WO2017107686A1

WO2017107686A1 - Method and apparatus for determining search space in narrowband system

Info

Publication number: WO2017107686A1
Application number: PCT/CN2016/104717
Authority: WO
Inventors: 石靖; 戴博; 夏树强; 袁弋非; 方惠英; 李书朋; 陈宪明
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-12-23
Filing date: 2016-11-04
Publication date: 2017-06-29

Abstract

The present invention provides a method and apparatus for determining a search space in a narrowband system. The method comprises: a terminal detects a search space where a narrowband downlink control channel is located, the search space using R subframes or a subframe set as a unit in a time domain, and the search space using a whole narrowband or M subcarriers in the narrowband as a unit in a frequency domain, the set of values of R and M being formed by positive integers, the subframe set comprising X subframes, and X being a fixed value or configured by a base station. By means of the present invention, the problem, in the prior art, of the structures of search spaces of control channels in an LTE system, failing to satisfy the demands of an NB-IoT narrowband system that only has one PRB in the frequency domain bandwidth is resolved.

Description

Method and device for determining search space in narrowband system

Technical field

The present invention relates to the field of communications, and in particular to a method and apparatus for determining a search space in a narrowband system.

Background technique

Machine Type Communication (MTC), also known as Machine to Machine (M2M), Narrow Band Internet of Things (NB-IoT) is the main application form of the Internet of Things. . The characteristics of the communication system are generally narrower than that of the Long Term Evolution (LTE) system, such as 1.4 MHz, 200 kHz, etc.; the number of user terminals or devices (User Equipment, UE for short) is large. Including traditional handheld terminals as well as machines, sensor terminals, etc.; with coverage enhancement requirements, including coverage improvement of 15dB or 20dB.

At present, there are three working scenarios in the NB-IoT system: In-band in the LTE system band, guard-band in the LTE system, and standalone in the independent band; such communication systems usually require independent operation or LTE. The system coexists; the transmission bandwidth and the downlink subcarrier spacing of the NB-IoT are 180 kHz and 15 kHz, respectively, which are the same as the bandwidth and subcarrier spacing of one Physical Resource Block (PRB) of the LTE system, respectively, which is beneficial to In the NB-IoT system, the design of the existing LTE system is reused. When the spectrum of the Global System for Mobile Communication (GSM) system reused by the NB-IoT system is adjacent to the spectrum of the LTE system, it is also advantageous. Reduce the mutual interference between the two systems.

The downlink data transmission and the uplink data transmission of the terminal are scheduled by using the downlink grant (Downlink grant, DL grant) and the uplink grant (Uplink grant, abbreviated as UL grant) respectively in the existing LTE system; wherein, the DL grant and the UL grant are collectively referred to as Downlink Control Information (DCI) is carried by a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) or an Enhanced Physical Downlink Control Channel (EPDCCH). The downlink data is carried in the Physical Downlink Shared Channel (PDSCH), and the uplink data is carried in the Physical Uplink Shared Channel (PUSCH). In the existing LTE system, the PDCCH uses the resources in the first 1-4 orthogonal frequency division multiplexing (OFDM) symbols of the system bandwidth, and the control channel element (CCE) is used as the basic aggregation. Resource granularity, the transmission method uses transmit diversity. The EPDCCH uses resources in a part of the PRBs in the system bandwidth to enhance the Control Channel Element (ECCE) as the basic aggregate resource granularity, and the transmission mode uses centralized transmission or distributed transmission.

Since the downlink control channel search space in the related art is located in the first 1-4 OFDM symbols of the system bandwidth, the aggregation level used by the enhanced downlink control signal exists only in one subframe, and the partial PRB in the subframe constitutes the search space frequency domain. set. Therefore, the control channel search space structure in the LTE system in the related art is not applicable to the demand of the NB-IoT narrowband system with only one PRB in the frequency domain bandwidth. In view of the above problems in the related art, there is currently no effective solution.

Summary of the invention

The embodiment of the invention provides a method and a device for determining a search space in a narrowband system, so as to at least solve the problem that the control channel search space structure in the LTE system in the related art is not applicable to the NB-IoT with only one PRB in the frequency domain bandwidth. The problem of the demand for narrowband systems.

According to an aspect of the embodiments of the present invention, a method for determining a search space in a narrowband system is provided, including: detecting, by a terminal, a search space in which a narrowband downlink control channel is located, wherein the search space has R subframes or The sub-frame set is a unit, and the search space is in the frequency domain of M subcarriers in the entire narrowband or narrowband, wherein the R and M value sets are positive integers, and the subframe set includes X subframes, and the X value is It is fixed or configured by the base station.

Optionally, the search space is continuous or discrete in a time domain, where the search space supports one or more coverage types, and each coverage type corresponds to a unique R value or one includes multiple R values. The set, R represents the number of repetitions of the downlink control channel.

Optionally, the search space continuously includes in the time domain: the search space is continuous in units of subframe sets and/or the search space is continuous in units of subframes.

Optionally, the search space is determined by at least one of a starting subframe, a subframe set size, a repetition number or a number of subframes, a detection period, a sub-band or a sub-carrier position, wherein the searching is determined The parameters of the space are predefined or fixed or base station configurations.

Optionally, the starting subframe is determined according to at least one of the following parameters: a maximum number of repetitions Rmax, an offset value offset, a radio frame number SFN, and a period M; wherein the manner of determining includes at least one of the following: The subframe number is index index k, and the subframe satisfying (10*SFN+k) mod Rmax=0; the starting subframe number is index k, and satisfies (10*SFN+k) mod N*Rmax=0 Subframe, N is a positive integer greater than 0; the starting subframe number is index k, and the subframe satisfying (10*SFN+k) mod M=0, M is a positive integer greater than or equal to Rmax; the starting subframe A frame numbered as index k and satisfying (10*SFN+k+offset) mod M=0, M is a positive integer greater than or equal to Rmax; the starting subframe number is index k, and satisfies (10*SFN+k +X*offset) mod M=0 subframe, M is a positive integer greater than or equal to Rmax, and X is a positive integer greater than zero.

Optionally, the value set of the period corresponding to the start subframe is determined according to the coverage type, and the value of the period corresponding to the start subframe is configured or fixed by the base station; and/or the offset value offset is taken. The set or value of values is determined according to the coverage type and/or period; or the value of the offset value offset is configured by the base station or fixed or determined according to the period.

Optionally, the value set of the period corresponding to the start subframe of the search space where the downlink control channel carrying the UL grant is located is determined according to at least one of the following: the coverage type, the uplink traffic channel PUSCH format, and the downlink control of the bearer UL grant The value of the period corresponding to the start subframe of the search space in which the channel is located is configured or fixed by the base station; and/or the value set or value of the offset value offset is determined according to at least one of the following: coverage type, period, and uplink service. Channel PUSCH format; or, the value of the offset value offset is configured by the base station or fixed or implicitly determined according to the period.

Optionally, in the case of a large coverage type, the period M and/or the offset value offset is greater than the value of the small coverage type.

Optionally, the subframe set size is determined by a fixed or base station configuration.

Optionally, when consecutive in the time domain, the starting subframe is a first subframe of the subframe set.

Optionally, when the search space is continuous in the time domain, repeating the used subframe and the intra-subframe aggregation level AL includes one of the following manners: when the subframe set is absent, starting from the start subframe R subframes are repeatedly transmitted in at least one of AL=1, 2, and 4 in one subframe; when the subframe set exists, AL=1 in the subframe set from the start subframe. And transmitting, by the at least one of 2, 4, 8, 16, 32, the R subframe sets; wherein, when the R subframes or the subframe set are repeatedly transmitted from the start subframe, the used subframe Is a available sub-frame.

Optionally, the search space includes at least an uplink control search space of an uplink grant UL grant and a downlink control search space of a downlink grant DL grant.

Optionally, the resources used by the uplink control search space and the downlink control search space are completely different resources or resources that are independently configured.

Optionally, the component form of the candidate set in the search space includes one of the following manners: the candidate set is composed of one or more aggregation levels and multiple repetition times, and the candidate sets of different repetition times correspond to The start subframe is the same; the candidate set is composed of one or more aggregation levels and multiple repetition times, and the start subframe corresponding to the candidate set of different repetition times is different, and the candidate set corresponding to the non-maximum repetition number is There are multiple in the search space; the candidate set is composed of multiple aggregation levels and one repetition number; the candidate set is composed of an aggregation level, wherein the candidate set fills all control of the search space a channel unit; the aggregation level corresponding to the candidate set is determined according to different application scenarios, where the application scenario includes at least an inband inband scenario, a standalone band standalone, and a guard band guardband scenario.

Optionally, when the search space is discrete in the time domain, use some or all resources in the window in units of detection windows or scheduling windows; or, in the search space, discrete and downlink control channel repetitions in the time domain During transmission, some or all of the resources are used within the window in units of detection windows or scheduling windows and time-domain repetitions within the window and/or between the windows are performed.

Optionally, in the detection window or the scheduling window, the downlink control channel is time division multiplexed with a downlink traffic channel, or resources used by different coverage types of the downlink control channel are time division multiplexed.

Optionally, when the transmission is repeated, the subframe set in the detection window is not repeated or the number of repetitions may be pre-configured.

Optionally, the search space is determined by at least one of the following parameters: a starting subframe, a subframe set, a repetition number, a scheduling window or a number of repetitions in the detection window, a repetition window length, a detection period, a sub-band or a sub-carrier position. Wherein the manner in which the search space is determined is a predefined or fixed or base station configuration.

Optionally, the manner in which the terminal detects the initial control channel unit in the search space includes: fixed or base station configuration or iterating between a subframe or a subframe set or a radio frame or a detection window or a search space according to a hash function. In the case of repeated transmission, the same control channel unit is used in each subframe/subframe of the repeated transmission, and the manner of configuring the base station includes: the user equipment UE-specific radio resource control RRC configuration start index and/or partial The value is offset and all UEs start the same.

Optionally, the component form of the candidate set in the search space includes one of the following manners: the candidate set is one or more The aggregation level is composed of multiple repetition times, and the start subframe corresponding to the candidate set of different repetition times is the same; the candidate set is composed of one or more aggregation levels and multiple repetition times, and the number of repetitions is different. The candidate subframe corresponding to the candidate set is different, and the candidate set corresponding to the non-maximum number of repetitions is plural in the search space; the candidate set is composed of multiple aggregation levels and one repetition number; the candidate set is composed of one An aggregation level composition, wherein the candidate set occupies all the control channel units in the search space; the aggregation level corresponding to the candidate set is determined according to different application scenarios, where the application scenario includes at least: an inband Inband scenario The standalone band and the guard band guardband scene are used independently; wherein the number of repetitions is determined by the number of repetitions between the windows, or by the number of repetitions in the window and the number of repetitions between the windows.

Optionally, the search space is time division multiplexed with different types, different messages, or different users/user groups.

Optionally, when the search space is in a frequency domain by a part of subcarriers, the frequency division multiplexing manner includes at least one of the following: frequency division multiplexing FDM between channels of the same type, and FDM between different types of channels. FDM between different coverage types, FDM between different message types, and different types of channels are multiplexed in units of enhanced control channel elements ECCE.

Optionally, the manner in which the downlink control channel scheduling indicates the downlink traffic channel in the frequency division multiplexing includes at least one of: indicating a subsequent sub-frame position in the same sub-band or sub-carrier position; indicating different cross-sub-band or sub-carrier The subframe position is occupied in the sub-band; the subsequent occupied subframe position in the same sub-band or sub-carrier position is indicated, and the sub-band or sub-carrier is indicated in different sub-bands.

Optionally, when the downlink control channel schedules the downlink traffic channel, the interval between the start subframe of the downlink traffic channel and the end subframe of the downlink control channel is in a subframe or a scheduling window, where The value of the interval between the start subframe of the downlink traffic channel and the end subframe of the downlink control channel is a fixed value or a variable value; wherein the value range of the variable value is based on at least the following parameters A determination: detection period, scheduling window, coverage type, physical uplink shared channel PUSCH format.

Optionally, when the uplink grant traffic control channel is configured to carry the uplink grant channel, the interval between the start subframe of the uplink traffic channel and the end subframe of the downlink control channel is in a subframe or a scheduling window. The value of the interval between the start subframe of the uplink traffic channel and the end subframe of the downlink control channel is a fixed value or a variable value.

Optionally, when the defined relationship is determined in units of the scheduling window, the scheduling window length is the same or independently determined when the uplink single carrier single tone transmission channel of different subcarrier intervals is used.

Optionally, the uplink grant UL grant indicates a starting subframe position of the uplink traffic channel in a window.

Optionally, the uplink grant UL grant indicates uplink single carrier transmission of different subcarrier spacing sizes.

Optionally, the uplink grant UL grant uses the same resource allocation indication bit field for uplink single carrier transmission of different subcarrier spacing sizes.

Optionally, the search space where the terminal detects the narrowband downlink control channel is configured by the high layer signaling to be one or more, including at least one of the following: only a single process is supported, and the base station configures a search space for the terminal by using high layer signaling; Supporting multiple processes, the base station configures a search space for the terminal through high-level signaling; supports multiple processes, and the base station configures multiple search spaces for the terminal through high-level signaling, at least one of which is located in a different search space from other processes.

Optionally, the method for determining a scheduling timing for scheduling a downlink traffic channel or an uplink traffic channel in a downlink control channel in the search space includes a following at least when the base station configures a search space for the terminal by using the high layer signaling. And determining: the value in the first timing value set indicated by the downlink control information carried by the downlink control channel; determining the value in the second timing value set indicated by the downlink control information carried by the first downlink control channel And determining, by the downlink information carried by the ith downlink control channel, an offset value of the traffic channel end subframe scheduled with respect to the downlink control information carried by the i-1th downlink control channel, where i is a positive integer greater than 1. The value in the second timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the first timing value set indicated by the downlink information carried by the ith downlink control channel is taken. The value determines that i is a positive integer greater than one.

Optionally, in a case where multiple processes are supported, the base station configures a search space for the terminal by using high layer signaling, and the downlink control channels for scheduling different process traffic channels are located in the same period, in the search space. The downlink control channel scheduling method for determining the scheduling timing of the downlink traffic channel or the uplink traffic channel includes at least one of the following:

The value of the timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the timing reference point is the first downlink control channel end subframe; and the downlink control information carried by the second downlink control channel indicates The value in the set of timing values is determined, and the timing reference point is an end subframe of the traffic channel scheduled by the first downlink control channel;

Determining, by using a value in the set of timing values indicated by the downlink control information carried by the first downlink control channel, the timing reference point is the end subframe of the first downlink control channel; and carrying the traffic channel scheduled for the first downlink control channel The timing reference point of the channel for feeding back the ACK/NACK is the ending subframe of the traffic channel scheduled by the second downlink control channel, and the offset value is determined by the value in the set of timing values indicated by the downlink control information carried by the first downlink control channel. ;

Determining, by using a value in the set of timing values indicated by the downlink control information carried by the first downlink control channel, the timing reference point is the end subframe of the first downlink control channel; and carrying the traffic channel scheduled for the first downlink control channel The timing reference point of the channel for feeding back the ACK/NACK is the ending subframe of the traffic channel scheduled by the second downlink control channel, and the offset value is determined by the value in the set of timing values indicated by the downlink control information carried by the first downlink control channel. And the timing reference point of the channel carrying the ACK/NACK of the traffic channel scheduled for the second downlink control channel is the end subframe of the channel carrying the ACK/NACK of the traffic channel scheduled for the first downlink control channel, and the offset value And determining, by using a value set in the timing value set indicated by the downlink control information carried by the second downlink control channel.

Optionally, the first downlink control channel is the same type as the second downlink control channel and is in a search space in the same period.

Optionally, in the case that multiple processes are supported, when the base station configures a search space for the terminal by using the high layer signaling, and the downlink control channel for scheduling different types of traffic channels is located in the same period, the downlink control channel in the search space A scheduling timing determining method for scheduling different types of traffic channels includes at least one of the following:

Determining the value in the set of timing values indicated by the downlink control information carried by the first downlink control channel, timing reference The point is the first downlink control channel end subframe; the value is determined by the value set in the downlink control information carried by the second downlink control channel, and the timing reference point is the bearer traffic channel scheduled for the first downlink control channel. End subframe of the channel that feeds back ACK/NACK;

Determining, by using a value in the set of timing values indicated by the downlink control information carried by the first downlink control channel, the timing reference point is the end subframe of the first downlink control channel; and carrying the traffic channel scheduled for the first downlink control channel The timing reference point of the channel for feeding back the ACK/NACK is the ending subframe of the traffic channel scheduled by the second downlink control channel, and the offset value is determined by the value in the set of timing values indicated by the downlink control information carried by the first downlink control channel. .

Optionally, the first downlink control channel is different from the second downlink control channel type and has a search space in the same period.

Optionally, the timing value set is a first timing value set or a second timing value set or a third timing value set; wherein the first timing value set or the second timing value set or The third set of timing values is a set that is different from the set element of the scheduled downlink traffic channel and the scheduled uplink traffic channel; or the first timing value set or the second timing value set or the third timing value set is configured for scheduling The downlink traffic channel and the scheduled uplink traffic channel and the timing offset indicating that the downlink traffic channel is fed back ACK/NACK are not the same set of set elements.

According to another aspect of the present invention, there is provided a device for determining a search space in a narrowband system, comprising: a detecting module configured to detect a search space in which a narrowband downlink control channel is located, wherein the search space is in time The domain is in units of R subframes or subframes, and the search space is in the frequency domain of M subcarriers in the entire narrowband or narrowband, where the R and M value sets are positive integers, and the subframe set includes X subframes, X is a fixed value or configured by the base station.

According to still another embodiment of the present invention, a storage medium is also provided. The storage medium is arranged to store program code for performing the following steps:

Detecting a search space where a narrowband downlink control channel is located, where the search space is in units of R subframes or subframe sets in the time domain, and the search space is in units of M subcarriers in the entire narrowband or narrowband in the frequency domain. The set of R and M values is a positive integer, and the subframe set includes X subframes, where X is a fixed value or configured by a base station.

In the embodiment of the present invention, the search space in which the narrowband downlink control channel is located is detected, wherein the search space is in units of R subframes or subframe sets in the time domain, and the search space is in the entire narrowband or narrowband in the frequency domain. The subcarriers are in units, where R and M are set to a positive integer, and the subframe set includes X subframes. The value of X is a fixed value or configured by the base station, and how to determine the search space in the narrowband system is achieved by time division transmission. The effect of reducing the blocking rate between the downlink control channels corresponding to different message types and different coverage types, and solving the related art, the control channel search space structure in the LTE system is not applicable to the NB-band with only one PRB in the frequency domain bandwidth. The problem of the demand for IoT narrowband systems.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of a method of determining a search space in a narrowband system according to an embodiment of the present invention;

2 is a structural block diagram of a device for determining a search space in a narrowband system according to an embodiment of the present invention;

3 is a schematic diagram of a search space when it is continuous in the time domain according to an alternative embodiment of the present invention;

4 is a schematic diagram of a search space when it is discrete in the time domain according to an alternative embodiment of the present invention;

5 is a schematic diagram of time division multiplexing of different coverage types in a control region according to an alternative embodiment of the present invention;

6 is a schematic diagram of control and data time division multiplexing according to an alternative embodiment of the present invention, where time division multiplexing is no longer used in different coverage areas;

7 is a schematic diagram of different coverage time division multiplexing, control area and data division re-time division multiplexing in the same coverage according to an alternative embodiment of the present invention;

8 is a schematic diagram of control and data time division multiplexing and control region dispersion according to an alternative embodiment of the present invention;

9 is a schematic diagram of time division of a search space by different types, different messages, and different users/user groups according to an embodiment of the present invention;

10 is a schematic diagram of a downlink control channel indicating only a downlink sub-frame position in a same sub-band or sub-carrier position on a resource indication of a downlink traffic channel when the downlink resource channel is frequency-division multiplexed according to an optional embodiment of the present invention;

11 is a schematic diagram of a downlink control channel indicating, on a resource indication, only the sub-bands occupy different sub-bands in different sub-bands and the starting subframes are the same when the downlink resource channel is frequency-division multiplexed according to an alternative embodiment of the present invention;

12 is a downlink control channel for a downlink traffic channel simultaneously indicating a subsequent sub-frame position in the same sub-band or sub-carrier position and a cross-subband or subcarrier on the resource indication according to an alternative embodiment of the present invention. a schematic diagram indicating the location of occupied subframes in different sub-bands;

13 is a downlink control channel for a downlink traffic channel simultaneously indicating a subsequent sub-frame position and a sub-subband or sub-band in the same sub-band or sub-carrier position on the resource indication according to an alternative embodiment of the present invention. The carrier indicates a schematic diagram of occupying a subframe position in different sub-bands and starting subframes of different sub-bands are the same;

14 is a schematic diagram of Rin time domain candidate set locations having the same relative position within a window in accordance with an alternate embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

In this embodiment, a method for determining a search space in a narrowband system is provided. FIG. 1 is a flowchart of a method for determining a search space in a narrowband system according to an embodiment of the present invention. As shown in FIG. 1, the flow includes the following steps. :

Step S102: The terminal determines a narrowband search space location.

Step S104: The terminal detects a narrowband downlink control channel in the determined narrowband search space, where the search space is in units of R subframes or subframe sets in the time domain, and the search space is in the frequency domain over the entire narrowband or narrowband M subframes. The carrier is a unit, where the set of R and M values is a positive integer, and the X subframes included in the subframe set are fixed by X or configurable by the base station.

It should be noted that step S102 and step S104 in this embodiment are further explanations for the terminal to detect the search space of the narrowband downlink control channel.

In addition, the search space in this embodiment generally refers to various application scenarios, such as inband inband, guard band guardband, standalone band standalone, and various overlay types, such as basic components of normal, medium, extreme, or basic components. The narrowband of the optional embodiment is 200 kHz or 180 kHz. When coexisting with LTE, the physical resource block PRB defined by LTE is used, corresponding to 180 kHz, and the narrowband is 1 PRB, wherein the number of subcarriers is 12. When cooperating with LTE in the time domain or working independently, the subframe uses LTE-defined subframes to contain 14 OFDM symbols and lasts for 1 ms in time, and the subframe set is fixed or predefined or base station configured several subframes, subframes The sub-frames included in the set are consecutive sub-frames or discrete sub-frames or consecutive or discrete sub-frames in a certain scheduling period or detection period, and the number of sub-frames may be selected as a set {1, 2, 4, 6, 8, 10, 16, 20} or a subset thereof. The base station configuration includes a manner of configuring the cell-specific type or the UE-specific type using SIB or RRC.

In an optional implementation manner of this embodiment, the search space involved in the embodiment is configured by one or more high layer signaling, including at least one of the following: only a single process is supported, and the base station configures the terminal by using high layer signaling. a search space; supporting multiple processes, the base station configures a search space for the terminal through high-level signaling; supports multiple processes, and the base station configures multiple search spaces for the terminal through high-level signaling, at least one of which is located in a different search from other processes. In space

Specifically, when only a single process is supported, the base station configures a search space for the terminal through high-level signaling; supports multiple processes, and the base station configures a search space for the terminal through high-level signaling; supports multiple processes, and the base station uses high-level signaling The terminal configures a plurality of search spaces, wherein at least one of the processes is located in a different search space from the other processes; wherein the specific content of the search space is as described in the present invention.

Further, when the base station configures a search space for the terminal by using the high layer signaling, the scheduling control method for scheduling the downlink traffic channel or the uplink traffic channel in the search space includes the following at least One:

The value of the first timing value set indicated by the downlink control information carried by the downlink control channel is determined; when the downlink traffic channel is scheduled, the first timing value set is preferably: {0, 4, 8, 12, 16 , 20, 24, 28}, or {0, 4, 8, 12, 16, 32, 48, 64}, or {0, 1, 2, 3, 4, 5, 6, 8, 10}, or R1 *{0, 1, 2, 3, 4, 5, 6, 8, 10}-R2; where R1 represents the number of repetitions of the scheduled downlink traffic channel and R2 represents the number of repetitions of the downlink control channel. The traffic channel scheduled when the downlink control information is the downlink grant is a downlink traffic channel. When scheduling the uplink traffic channel, the first set of timing values is preferably: {8, 12, 16, 20}, or {8, 12, 16, 32}, or {8, 10, 12, 14}, or

or

Where R1 represents the number of repetitions of the scheduled uplink traffic channel, and R2 represents the number of repetitions of the downlink control channel.

Indicates the time domain length when the uplink traffic channel is a single resource unit. As shown in Table 1, N _RU represents the number of resource elements included in the uplink traffic channel, where the value of N _RU is set {0, 1, 2, 3, 4 One of 5, 6, 8, 10}. The traffic channel scheduled when the downlink control information is the uplink grant is an uplink traffic channel.

Table 1

The value in the second timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the downlink information indicated by the ith downlink control channel indicates the i-1th downlink control channel. The offset value of the service channel end subframe of the downlink control information scheduled by the bearer is determined, i is a positive integer greater than 1; when the downlink traffic channel is scheduled, the second timing set is {0, 4, 8, 12, 16, 32, 64, 128} or {0, 16, 32, 64, 128, 256, 512, 1024}. When multiple processes have a maximum of 2 processes, i=2; when multiple processes have a maximum of 4 processes, i=2, 3, 4; when multiple processes have a maximum of 8 processes, i=2, 3 4, 5, 6, 7, 8; the offset value is preferably selected from the third set of timing values, and the third set of timing values is preferably: {0, 1, 2, 3, 4, 5, 6, 7 , 8}, or {0, 2, 4, 6, 8, 10, 12, 14}, or {0, 1, 2, 3, 4, 6, 8, 10}, or {0, 2, 4, 6, 8, 12, 16, 20}, or {0, 1, 2, 3, 4, 8, 12, 16}. The downlink control information carried by the i-th downlink control channel and the i-th downlink control channel are of the same type, that is, the downlink authorization is performed. The ith downlink control channel and the i-1th downlink control channel are both sent to the same UE. The traffic channel scheduled when the downlink control information is the downlink grant is a downlink traffic channel. When the uplink traffic channel is scheduled, the second timing set is {8, 16, 32, 64}. When multiple processes have a maximum of 2 processes, i=2; when multiple processes have a maximum of 4 processes, i=2, 3, 4; when multiple processes have a maximum of 8 processes, i=2, 3 4, 5, 6, 7, 8; the offset value is preferably selected from the third set of timing values, and the third set of timing values is preferably: {0, 1, 2, 3}, or {0, 2 4, 6}, or {0, 2, 6, 10}, or {0, 4, 8, 12}, or {0, 1, 3, 5}. The downlink control information carried by the i-th downlink control channel and the i-th downlink control channel are of the same type, that is, the uplink authorization. The ith downlink control channel and the i-1th downlink control channel are both sent to the same UE. The traffic channel scheduled when the downlink control information is the uplink grant is an uplink traffic channel. The i-th control channel and the i-th control channel are determined in the following manner: (method 1, determined by time-frequency resources), when the same search space is in the same period, the i-th control channel in the time domain is located at the i-1th After the control channel, when the aggregation level AL=1 is used for the control channel and the time domain position is the same, the i-th control channel in the frequency domain is located after the i-1th control channel. The i-th control channel in the time domain is located after the i-1th control channel in different periods of the same search space. (Mode 2, determined by the process number) The process number of the i-th control channel is greater than the process number of the i-1th control channel.

The value in the second set of timing values indicated by the downlink control information carried by the first downlink control channel is determined, and the value in the first set of timing values indicated by the downlink information carried by the ith downlink control channel is determined. It is determined that i is a positive integer greater than one; when scheduling the downlink traffic channel, wherein the second timing set is {0, 4, 8, 12, 16, 32, 64, 128} or {0, 16, 32, 64, 128, 256, 512, 1024}. When multiple processes have a maximum of 2 processes, i=2; when multiple processes have a maximum of 4 processes, i=2, 3, 4; when multiple processes have a maximum of 8 processes, i=2, 3 , 4, 5, 6, 7, 8; wherein the first set of timing values is preferably: {0, 4, 8, 12, 16, 20, 24, 28}, or {0, 4, 8, 12, 16 , 32, 48, 64}, or {0, 1, 2, 3, 4, 5, 6, 8, 10}, or R1*{0, 1, 2, 3, 4, 5, 6, 8, 10 }-R2; where R1 represents the number of repetitions of the scheduled traffic channel and R2 represents the number of repetitions of the downlink control channel. The downlink control information carried by the i-th downlink control channel and the i-th downlink control channel are of the same type, that is, the downlink authorization is performed. The ith downlink control channel and the i-1th downlink control channel are both sent to the same UE. The traffic channel scheduled when the downlink control information is the downlink grant is a downlink traffic channel. When the downlink traffic channel is scheduled, the second timing set is {8, 16, 32, 64}. When multiple processes have a maximum of 2 processes, i=2; when multiple processes have a maximum of 4 processes, i=2, 3, 4; when multiple processes have a maximum of 8 processes, i=2, 3 , 4, 5, 6, 7, 8; wherein the first set of timing values is preferably: {8, 12, 16, 20}, or {8, 12, 16, 32}, or {8, 10, 12, 14}, or

or

Indicates the time domain length when the uplink traffic channel is a single resource unit. As shown in Table 2, N _RU represents the number of resource elements included in the uplink traffic channel, where the value of N _RU is set {0, 1, 2, 3, 4 One of 5, 6, 8, 10}. The downlink control information carried by the i-th downlink control channel and the i-th downlink control channel are of the same type, that is, the uplink authorization. The ith downlink control channel and the i-1th downlink control channel are both sent to the same UE. The traffic channel scheduled when the downlink control information is the uplink grant is an uplink traffic channel.

The i-th control channel and the i-th control channel are determined in the following manner: (method 1, determined by time-frequency resources), when the same search space is in the same period, the i-th control channel in the time domain is located at the i-1th After the control channel, when the aggregation level AL=1 is used for the control channel and the time domain position is the same, the i-th control channel in the frequency domain is located after the i-1th control channel. The i-th control channel in the time domain is located after the i-1th control channel in different periods of the same search space. (Mode 2, determined by the process number) The process number of the i-th control channel is greater than the process number of the i-1th control channel.

Further, when the plurality of processes are supported, the base station configures a search space for the terminal by using the high layer signaling, and the downlink control channel for scheduling the traffic channels of different processes is located in the same period, and the downlink control channel is scheduled to be downlinked in the search space. The scheduling timing determining method of the traffic channel or the uplink traffic channel includes at least one of the following:

The value of the timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the timing reference point is the first downlink control channel end subframe; and the downlink control information carried by the second downlink control channel indicates The value in the set of timing values is determined, and the timing reference point is the end subframe of the traffic channel scheduled by the first downlink control channel.

Determining, by using a value in the set of timing values indicated by the downlink control information carried by the first downlink control channel, the timing reference point is the end subframe of the first downlink control channel; and carrying the traffic channel scheduled for the first downlink control channel The timing reference point of the channel for feeding back the ACK/NACK is the end subframe of the traffic channel scheduled by the second downlink control channel, and the offset value is The value in the set of timing values indicated by the downlink control information carried by the first downlink control channel is determined.

Determining, by using a value in the set of timing values indicated by the downlink control information carried by the first downlink control channel, the timing reference point is the end subframe of the first downlink control channel; and carrying the traffic channel scheduled for the first downlink control channel The timing reference point of the channel for feeding back the ACK/NACK is the ending subframe of the traffic channel scheduled by the second downlink control channel, and the offset value is determined by the value in the set of timing values indicated by the downlink control information carried by the first downlink control channel. . And the timing reference point of the channel carrying the ACK/NACK for the traffic channel scheduled by the second downlink control channel is the end subframe of the channel carrying the ACK/NACK for the traffic channel scheduled for the first downlink control channel, and the offset value is passed. The value of the set of timing values indicated by the downlink control information carried by the second downlink control channel is determined.

Further, the first downlink control channel is the same as the second downlink control channel type and has a search space in the same period. Specifically, the first downlink control channel and the second downlink control channel are both channels carrying the downlink grant information for scheduling the downlink traffic channel, and are referred to as the same type. The first downlink control channel and the second downlink control channel are located in the same search space and are in the same period, and the period is a period that is satisfied by configuring the start subframe of the search space.

Further, the timing value set is a first timing value set or a second timing value set or a third timing value set. The first timing value set or the second timing value set or the third timing value set is a set in which the scheduled downlink traffic channel and the scheduled uplink traffic channel are not all the same set elements; or the first timing value set is set. Or the second timing value set or the third timing value set is a set that is different from the set element for scheduling the downlink traffic channel and scheduling the uplink traffic channel and indicating that the downlink traffic channel feedback ACK/NACK is delayed. Specifically, when the value is determined in the timing value set indicated by the downlink control information carried by the first downlink control channel, the timing value set is preferably a second timing value set, or may be a first timing A set of values or a set of third timing values. Specifically, when the value is determined in the timing value set indicated by the downlink control information carried by the second downlink control channel, the timing value set is preferably a third timing value set or a second timing value set or A set of values is taken at a certain time. Specifically, the timing value set used by the downlink control information carried by the first downlink control channel for indicating the timing offset value of the channel of the ACK/NACK for the traffic channel scheduled by the first downlink control channel is preferably a third timing. A set of values or a set of second timing values or a set of first timing values. Specifically, the downlink control information carried by the second downlink control channel is used to indicate the timing offset value of the channel ACK/NACK channel of the traffic channel scheduled by the second downlink control channel, and the timing value set used is preferably the third timing value. The set or the second set of timing values or the first set of timing values. Specifically, the first timing value set or the second timing value set or the third timing value set is not the same set for the scheduled downlink traffic channel and the scheduled uplink traffic channel, and the specific set example is as follows. As described in the examples. Specifically, the timing offset of the first timing value set or the second timing value set or the third timing value set for scheduling the downlink traffic channel and scheduling the uplink traffic channel and indicating the downlink traffic channel feedback ACK/NACK is The collection elements are not all the same collection. The specific collection examples are described in the specific examples below.

When the same UE detects more than one downlink control channel in the search space in the same period, and all of them carry downlink authorization information for scheduling the downlink traffic channel. When scheduling the downlink traffic channel, where the second timing value set is {0, 4, 8, 12, 16, 32, 64, 128} (when the set is for Rmax<128, Rmax is the maximum number of repetitions of the downlink control channel) Or {0, 16, 32, 64, 128, 256, 512, 1024} (this set is for Rmax ≥ 128, Rmax is the maximum number of repetitions of the downlink control channel). The third set of timing values is preferably: {0, 1, 2, 3, 4, 5, 6, 7, 8}, or {0, 2, 4, 6, 8, 10, 12, 14}, or {0, 1, 2, 3, 4, 6, 8, 10}, or {0, 2, 4, 6, 8, 12, 16, 20}, or {0, 1, 2, 3, 4, 8, 12, 16}. The first set of timing values is preferably: {0, 4, 8, 12, 16, 20, 24, 28}, or {0, 4, 8, 12, 16, 32, 48, 64}, or {0, 1, 2, 3, 4, 5, 6, 8, 10}, or R1*{0, 1, 2, 3, 4, 5, 6, 8, 10}-R2; where R1 represents the scheduled downlink service The number of repetitions of the channel, and R2 represents the number of repetitions of the downlink control channel. The downlink control information carried by the first downlink control channel and the second downlink control channel are of the same type, that is, the downlink authorization is performed. The first downlink control channel and the second downlink control channel are both sent to the same UE. The traffic channel scheduled when the downlink control information is the downlink grant is a downlink traffic channel. The value of the timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the timing reference point is the end subframe of the first downlink control channel, and is at a minimum timing (eg, using a minimum interval of 4 ms, that is, Adding the value to the minimum timing n+5); determining the value in the timing value set indicated by the downlink control information carried by the second downlink control channel, and the timing reference point is the first downlink control channel scheduling The end subframe of the traffic channel may be added to the minimum timing basis, or the timing may be directly used to determine the timing without minimum timing. The value of the corresponding subframe is a available subframe or a physical subframe.

When the same UE detects only one downlink control channel in the search space in the same period, and performs downlink grant information for scheduling the downlink traffic channel. When scheduling the downlink traffic channel, only the second timing value set is used as {0, 4, 8, 12, 16, 32, 64, 128} or {0, 16, 32, 64, 128, 256, 512, 1024. }. The value of the timing value set indicated by the downlink control information carried by the downlink control channel is determined, and the timing reference point is the first downlink control channel end subframe, and is at a minimum timing (eg, using a minimum interval of 4 ms, that is, a minimum timing) Add the value based on n+5). The value of the corresponding subframe is a available subframe or a physical subframe.

When the same UE detects more than one downlink control channel in the search space in the same period, and all of them carry uplink grant information for scheduling the uplink traffic channel. When the uplink traffic channel is scheduled, the second timing set is {8, 16, 32, 64}. The third set of timing values is preferably: {0, 1, 2, 3}, or {0, 2, 4, 6}, or {0, 2, 6, 10}, or {0, 4, 8, 12 }, or {0, 1, 3, 5}. The first set of timing values is preferably: {8, 12, 16, 20}, or {8, 12, 16, 32}, or {8, 10, 12, 14}, or

or

Indicates the time domain length when the uplink traffic channel is a single resource unit. As shown in Table 1, N _RU represents the number of resource elements included in the uplink traffic channel, where the value of N _RU is set {0, 1, 2, 3, 4 One of 5, 6, 8, 10}. The downlink control information carried by the first downlink control channel and the second downlink control channel are of the same type, that is, the uplink authorization is performed. The first downlink control channel and the second downlink control channel are both sent to the same UE. The traffic channel scheduled when the downlink control information is the uplink grant is an uplink traffic channel. The value of the timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the timing reference point is the first downlink control channel end subframe; and the downlink control information carried by the second downlink control channel indicates The value in the set of timing values is determined, and the timing reference point is the end subframe of the traffic channel scheduled by the first downlink control channel, and the value may be added on the basis of the minimum timing, or may be directly used without minimum timing. The value is determined to determine the timing.

For the same UE, only one downlink control channel is detected in the search space in the same period, and the uplink grant information for scheduling the uplink traffic channel is carried. When scheduling the uplink traffic channel, only the second timing value set is used as {8, 16, 32, 64}. The value of the timing value set indicated by the downlink control information carried by the downlink control channel is determined, and the timing reference point is the first downlink control channel end subframe.

When the same UE detects more than one downlink control channel in the search space in the same period, and all of them carry downlink authorization information for scheduling the downlink traffic channel. When indicating a timing offset for feeding back ACK/NACK to the downlink traffic channel, where the second timing set is {0, 8} (the set is for a subcarrier spacing of 3.75 kHz) or {0, 2, 4, 5 } (This set is for a subcarrier spacing of 15 kHz). The third timing set is preferably {0, 1}, or {0, 2}, or {0, 4}, or {0, 6}, or {0, 10} when the subcarrier spacing is 3.75 kHz. When the subcarrier spacing is 15 kHz, it is preferably: {0, 1, 2, 3}, or {0, 1, 2, 4}, or {0, 2, 4, 6}, or {0, 1, 3 , 4}, or {0, 1, 3, 5}. The first timing set is preferably: {0, 16}, or {0, 32}, or {0, 48}, or {0, 64} when the subcarrier spacing is 3.75 kHz; the subcarrier spacing is 15 kHz. The time is preferably: {0, 4, 8, 12}, or {0, 8, 16, 24}, or {0, 8, 16, 32}, or {0, 12, 24, 36}, or {0 , 12, 24, 48}. The downlink control information carried by the first downlink control channel and the second downlink control channel are of the same type, that is, the downlink authorization is performed. The first downlink control channel and the second downlink control channel are both sent to the same UE. The traffic channel scheduled when the downlink control information is the downlink grant is a downlink traffic channel. When the downlink control information carried by the first downlink control channel indicates the timing offset of the downlink traffic channel feedback ACK/NACK scheduled by the first downlink control channel, the timing reference point is the end of the traffic channel scheduled by the second downlink control channel. The subframe may be added to the minimum timing interval (eg, with a minimum interval of 12 ms), or the timing may be directly used to determine the timing without minimum timing. Optionally, when the downlink control information carried by the second downlink control channel indicates the timing offset of the downlink traffic channel feedback ACK/NACK scheduled by the second downlink control channel, the timing reference point is the bearer pair first downlink control channel. The end subframe of the channel for which the scheduled traffic channel feeds back the ACK/NACK may be added to the minimum timing interval (eg, using a minimum interval of 12 ms), or may be directly used to determine the timing without using the minimum timing. .

When the same UE detects only one downlink control channel in the search space in the same period, and performs downlink grant information for scheduling the downlink traffic channel. When indicating the timing offset of the ACK/NACK for the downlink traffic channel, only the second timing set is {0, 8} (the set is for the subcarrier spacing of 3.75 kHz) or {0, 2, 4, 5} (This set is for a subcarrier spacing of 15 kHz). When the downlink control information carried by the downlink control channel indicates that the timing offset of the ACK/NACK is fed back to the downlink traffic channel, the timing reference point is the end subframe of the traffic channel scheduled by the second downlink control channel, and is at the minimum timing interval ( The value is added on the basis of a minimum interval of 12 ms.

The first downlink control channel and the second downlink control channel are determined by: (method 1, determined by time-frequency resources), when the same search space is in the same period, the second downlink control channel is located in the first downlink control channel in the time domain. Then, when the aggregation level AL=1 is used for the downlink control channel and the time domain location is the same, the second downlink control channel in the frequency domain is located after the first downlink control channel. (Mode 2, determined by the process ID) The process number of the second downlink control channel is greater than the process ID of the first downlink control channel.

Further, when the plurality of processes are supported, the base station configures a search space for the terminal by using the high layer signaling, and the downlink control channels for scheduling different types of traffic channels are located in the same period, and the downlink control channel scheduling in the search space is different. The scheduling timing determination method of the type traffic channel includes at least one of the following:

Determining the value in the set of timing values indicated by the downlink control information carried by the first downlink control channel, timing reference The point is the first downlink control channel end subframe; the value is determined by the timing value set indicated by the downlink control information carried by the second downlink control channel, and the timing reference point is the end of the traffic channel scheduled by the first downlink control channel. Subframe.

The value of the timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the timing reference point is the first downlink control channel end subframe; and the downlink control information carried by the second downlink control channel indicates The value in the set of timing values is determined. The timing reference point is an end subframe of a channel carrying ACK/NACK for the traffic channel scheduled for the first downlink control channel.

Further, the first downlink control channel is different from the second downlink control channel type and has a search space in the same period. Specifically, the first downlink control channel is a channel that carries downlink grant information for scheduling a downlink traffic channel, and the second downlink control channel is a channel that carries uplink grant information for scheduling an uplink traffic channel, and is called a different type. Alternatively, the first downlink control channel is a channel carrying uplink grant information for scheduling an uplink traffic channel, and the second downlink control channel is a channel carrying downlink grant information for scheduling a downlink traffic channel, which is called a type. The first downlink control channel and the second downlink control channel are located in the same search space and are in the same period, and the period is a period that is satisfied by configuring the start subframe of the search space.

Further, the timing value set is a first timing value set or a second timing value set or a third timing value set. The first timing value set or the second timing value set or the third timing value set is a set in which the scheduled downlink traffic channel and the scheduled uplink traffic channel are not all the same set elements; or the first timing value set is set. Or the second timing value set or the third timing value set is a set that is different from the set element for scheduling the downlink traffic channel and scheduling the uplink traffic channel and indicating that the downlink traffic channel feedback ACK/NACK is delayed. Specifically, when the value is determined in the timing value set indicated by the downlink control information carried by the first downlink control channel, the timing value set is preferably a second timing value set, or may be a first timing A set of values or a set of third timing values. Specifically, when the value is determined in the timing value set indicated by the downlink control information carried by the second downlink control channel, the timing value set is preferably a third timing value set or a second timing value set or A set of values is taken at a certain time. Specifically, the timing value set used by the downlink control information carried by the first downlink control channel for indicating the timing offset value of the channel of the ACK/NACK for the traffic channel scheduled by the first downlink control channel is preferably a third timing. A set of values or a set of second timing values or a set of first timing values. Specifically, the first timing value set or the second timing value set or the third timing value set is not the same set for the scheduled downlink traffic channel and the scheduled uplink traffic channel, and the specific set example is as follows. As described in the examples. Specifically, the timing offset of the first timing value set or the second timing value set or the third timing value set for scheduling the downlink traffic channel and scheduling the uplink traffic channel and indicating the downlink traffic channel feedback ACK/NACK is The collection elements are not all the same collection. The specific collection examples are described in the specific examples below.

When the same UE detects more than one downlink control channel in the search space in the same period, and one of them is the downlink grant information that carries the scheduled downlink traffic channel, and the other is the uplink grant information that carries the scheduled uplink traffic channel. When the downlink control channel is scheduled by the first downlink control channel, where the second timing value set is {0, 4, 8, 12, 16, 32, 64, 128} (when the set is Rmax<128, Rmax is downlink) The maximum number of repetitions of the control channel) or {0, 16, 32, 64, 128, 256, 512, 1024} (when Rmax ≥ 128, Rmax is the maximum number of repetitions of the downlink control channel). The third set of timing values is preferably: {0, 1, 2, 3, 4, 5, 6, 7, 8}, or {0, 2, 4, 6, 8, 10, 12, 14}, or { 0, 1, 2, 3, 4, 6, 8, 10}, or {0, 2, 4, 6, 8, 12, 16, 20}, or {0, 1, 2, 3, 4, 8, 12, 16}. The first set of timing values is preferably: {0, 4, 8, 12, 16, 20, 24, 28}, or {0, 4, 8, 12, 16, 32, 48, 64}, or {0, 1, 2, 3, 4, 5, 6, 8, 10}, or R1*{0, 1, 2, 3, 4, 5, 6, 8, 10}-R2; where R1 represents the scheduled downlink service The number of repetitions of the channel, and R2 represents the number of repetitions of the downlink control channel. The value of the timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the timing reference point is the end subframe of the first downlink control channel, which may be at a minimum timing (eg, using a minimum interval of 4 ms, that is, Adding the value to the minimum timing n+5) may also directly add the value without using a minimum timing, where the corresponding subframe is a available subframe or a physical subframe. When the second downlink control channel schedules the uplink traffic channel, the second timing set is {8, 16, 32, 64}. The third set of timing values is preferably: {0, 1, 2, 3}, or {0, 2, 4, 6}, or {0, 2, 6, 10}, or {0, 4, 8, 12 }, or {0, 1, 3, 5}. The first set of timing values is preferably: {8, 12, 16, 20}, or {8, 12, 16, 32}, or {8, 10, 12, 14}, or

or

Indicates the time domain length when the uplink traffic channel is a single resource unit. As shown in Table 1, N _RU represents the number of resource elements included in the uplink traffic channel, where the value of N _RU is set {0, 1, 2, 3, 4 One of 5, 6, 8, 10}. The value of the timing value set indicated by the downlink control information carried by the second downlink control channel is determined, and the timing reference point is the end subframe of the traffic channel scheduled by the first downlink control channel; or the timing reference point is the bearer pair. The traffic channel scheduled by the downlink control channel feeds back the end subframe of the ACK/NACK channel. The value may be added to the minimum timing or the timing may be directly determined using the value without minimum timing. The downlink control information carried by the first downlink control channel and the second downlink control channel is different. The first downlink control channel and the second downlink control channel are both sent to the same UE. The traffic channel scheduled when the downlink control information is the downlink grant is a downlink traffic channel. The traffic channel scheduled when the downlink control information is the uplink grant is an uplink traffic channel. Optionally, in this example, the uplink traffic channel is scheduled for the first downlink control channel, and the downlink traffic channel is also applicable to the second downlink control channel, and details are not described herein.

When the same UE detects more than one downlink control channel in the search space in the same period, and one of them is the downlink grant information that carries the scheduled downlink traffic channel, and the other is the uplink grant information that carries the scheduled uplink traffic channel. When the first downlink control channel schedules the downlink traffic channel, where the second timing value set is {0, 4, 8, 12, 16, 32, 64, 128} (when the set is for Rmax<128, Rmax is downlink) The maximum number of repetitions of the control channel) or {0, 16, 32, 64, 128, 256, 512, 1024} (when Rmax ≥ 128, Rmax is the maximum number of repetitions of the downlink control channel). The third set of timing values is preferably: {0, 1, 2, 3, 4, 5, 6, 7, 8}, or {0, 2, 4, 6, 8, 10, 12, 14}, or { 0, 1, 2, 3, 4, 6, 8, 10}, or {0, 2, 4, 6, 8, 12, 16, 20}, or {0, 1, 2, 3, 4, 8, 12, 16}. The first set of timing values is preferably: {0, 4, 8, 12, 16, 20, 24, 28}, or {0, 4, 8, 12, 16, 32, 48, 64}, or {0, 1, 2, 3, 4, 5, 6, 8, 10}, or R1*{0, 1, 2, 3, 4, 5, 6, 8, 10}-R2; where R1 represents the scheduled downlink service The number of repetitions of the channel, and R2 represents the number of repetitions of the downlink control channel. The value of the timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the timing reference point is the end subframe of the first downlink control channel, which may be at a minimum timing (eg, using a minimum interval of 4 ms, that is, Adding the value to the minimum timing n+5) may also directly add the value without using a minimum timing, where the corresponding subframe is a available subframe or a physical subframe. When the second downlink control channel schedules the uplink traffic channel, the second timing set is {8, 16, 32, 64}. The third set of timing values is preferably: {0, 1, 2, 3}, or {0, 2, 4, 6}, or {0, 2, 6, 10}, or {0, 4, 8, 12 }, or {0, 1, 3, 5}. The first set of timing values is preferably: {8, 12, 16, 20}, or {8, 12, 16, 32}, or {8, 10, 12, 14}, or

or

Indicates the time domain length when the uplink traffic channel is a single resource unit. As shown in Table 1, N _RU represents the number of resource elements included in the uplink traffic channel, where the value of N _RU is set {0, 1, 2, 3, 4 One of 5, 6, 8, 10}. The value of the timing value set indicated by the downlink control information carried by the second downlink control channel is determined, and the timing reference point is the end subframe of the second downlink control channel. And the timing reference point of the channel carrying the ACK/NACK for the traffic channel scheduled by the first downlink control channel is the end subframe of the traffic channel scheduled by the second downlink control channel, and the offset value is carried by the first downlink control channel. The value in the set of timing values indicated by the downlink control information is determined. The value set is a third timing value set or a second timing value set or a first timing value set, where the second timing value set is {0, 8} (the set is for a subcarrier spacing of 3.75 kHz) Time) or {0, 2, 4, 5} (this set is for a subcarrier spacing of 15 kHz). The third timing set is preferably {0, 1}, or {0, 2}, or {0, 4}, or {0, 6}, or {0, 10} when the subcarrier spacing is 3.75 kHz. When the subcarrier spacing is 15 kHz, it is preferably: {0, 1, 2, 3}, or {0, 1, 2, 4}, or {0, 2, 4, 6}, or {0, 1, 3 , 4}, or {0, 1, 3, 5}. The first timing set is preferably: {0, 16}, or {0, 32}, or {0, 48}, or {0, 64} when the subcarrier spacing is 3.75 kHz; the subcarrier spacing is 15 kHz. The time is preferably: {0, 4, 8, 12}, or {0, 8, 16, 24}, or {0, 8, 16, 32}, or {0, 12, 24, 36}, or {0 , 12, 24, 48}. The value may be added to the minimum timing or the timing may be directly determined using the value without minimum timing. The downlink control information carried by the first downlink control channel and the second downlink control channel is different. The first downlink control channel and the second downlink control channel are both sent to the same UE. The traffic channel scheduled when the downlink control information is the downlink grant is a downlink traffic channel. The traffic channel scheduled when the downlink control information is the uplink grant is an uplink traffic channel. Optionally, in this example, the uplink traffic channel is scheduled for the first downlink control channel, and the downlink traffic channel is also applicable to the second downlink control channel, and details are not described herein.

In an optional implementation manner of this embodiment, the search space involved in this embodiment is continuous or discrete in the time domain, and The coverage type supported by the search space includes one or more types, each coverage type corresponding to a unique R value or a set including multiple R values, and R represents the number of repetitions of the downlink control channel.

In the specific application scenario of this embodiment, for the coverage type involved in this embodiment, when each coverage type uniquely supports one R value, the normal coverage corresponds to R1, the medium coverage corresponds to R2, and the extreme coverage corresponds to R3; When the coverage type supports an R value set, when each value set is independent of each other, such as normal coverage corresponds to {R1, R2, R3, R4}, medium coverage corresponds to {R5, R6, R7, R8}, and extreme coverage corresponds to { R9, R10, R11, R12}; when each value set overlaps with each other, such as normal coverage corresponding to {R1, R2, R3, R4}, medium coverage corresponds to {R3, R4, R5, R6}, and extreme coverage corresponds to {R5 , R6, R7, R8}.

When the search space is continuous in the time domain in this embodiment, it may be included that the search space is continuous in units of subframe sets and/or the search space is continuous in units of subframes. Based on this, the search space is determined by at least one of the following parameters: a starting subframe, a number of repetitions or a number of subframes, a detection period, a sub-band or a sub-carrier position, wherein the parameters of the search space are determined to be predefined configurations or fixed. Or base station configuration. It should be noted that the fixed means that the parameter of the search space is not required to be configured by the base station, and is directly determined to be a fixed value in the standard.

The base station configuration may be configured by using an SIB or an RRC, for example, a starting subframe in the configuration parameter: (1) determining by a period (such as a first subframe in a period); (2) or determining a period + offset; Length: the number of repetitions (regardless of whether there is a subframe set, the number of repetitions is the number of repetitions in units of subframes or subframes) or the number of subframes (the number of repetitions is equal to the number of subframes when there is no subframe set), when When there are multiple Rs in the search space, the value is based on the maximum value Rmax of R. The subframe used by the repetition may be a physical subframe or a usable subframe; period: the parameter needs to be greater than Rmax. Preferably, the integer multiple of Rmax, or integer multiple + offset; sub-band or sub-carrier position: only applicable to the case where the search space does not occupy 1 PRB or the entire narrow band in the frequency domain, and the frequency domain sub-carrier needs to be configured when configuring the subframe resource. Resources, for example, configuration {subframe number S, number of subcarriers C}; for example: {8 subframe, 3 subcarrier}, {16 subframe, 3 subcarrier}, {32 subframe, 3 subcarrier}; {4 subframe, 6 subcarrier}, {8 subframe, 6 subcarrier}, {16 subframe, 6 subcarrier}, etc.

The initial subframe involved may be determined according to at least one of the following parameters: a maximum number of repetitions Rmax, an offset value offset, a radio frame number SFN, a period M; and the determining manner based on the foregoing parameters may include at least one of the following : the starting subframe number is index index k, and the subframe satisfying (10*SFN+k) mod Rmax=0; or, the starting subframe number is index k, and satisfies (10*SFN+k) mod N *Subframe with Rmax=0, N is a positive integer greater than 0; or, the starting subframe number is index k, and the subframe satisfying (10*SFN+k)mod M=0, M is greater than or equal to Rmax a positive integer; or, the starting subframe number is index k, and satisfies (10*SFN+k+offset) mod M=0, M is a positive integer greater than or equal to Rmax; or, the starting subframe number is Index k, and satisfying (10*SFN+k+X*offset) mod M=0, M is a positive integer greater than or equal to Rmax, and X is a positive integer greater than 0.

In this embodiment, the value set of the period corresponding to the start subframe of the start subframe mentioned above is determined according to the coverage type, and the value is configured or fixed by the base station. And or offset value offset determines the set of values or values according to the coverage type and or period, which is configured or fixed by the base station or implicitly determined according to the period. Both the period and the offset value can exist, or only the period has no offset value.

The value set of the period corresponding to the start subframe is determined according to the coverage type, and the value is configured or fixed by the base station. For example, the coverage type set corresponding to the coverage type x3 (such as the extreme coverage) is {M10, M9, M8, M7}. When configured by the base station, one of the values is configured (signaled by the SIB or RRC) to notify the terminal of the period. Value, at this time, the signaling uses 2 bits to indicate the values of the four periods. The coverage type x2 (such as medium coverage) corresponds to a case where the set of period values has an intersection with the coverage type x3, such as {M8, M7, M6, M5} or no overlap with the coverage type x3, such as {M6, M5, M4, M3}, configure one of the values through the SIB or RRC to inform the terminal of the period value. The number of elements in the above set is only an example. The period value is, for example, 1, 2, 4, 8, 16, 32, 64, 128, 256 ms or 10, 20, 30, 40, 80, 100 ms, or the like. The offset value offset determines the set of values or values according to the coverage type and or the period, which is configured by the base station or fixed or implicitly determined according to the period. For example, the offset value set corresponding to the coverage type x3 (eg, extreme coverage) is {z1, z2, z3, z4}. When configured by the base station, one of the values is configured by the SIB or RRC to notify the terminal of the offset value. Or, according to the period implicitly, when the base station configuration period is the set of Mi or Mi, the offset corresponds to the set of zi or zi, and the value or the set of values is determined according to the implicit correspondence table 2, and when determined as the set of values, the base station is determined. One of the values is configured. It should be noted that when there is no offset value in the configuration period only, the value of the zi is 0.

Table 2

周期MCycle M	偏移值offsetOffset value offset
M1M1	z1或{z1、z2、z3、z4}Z1 or {z1, z2, z3, z4}
M2M2	z2或{z1、z2、z3、z4}Z2 or {z1, z2, z3, z4}
…...	…...
MiMi	zi或{z(i-1)、zi、z(i+1)、z(i+2)}Zi or {z(i-1), zi, z(i+1), z(i+2)}

In addition, the value set of the period corresponding to the start subframe of the search space in which the downlink control channel carrying the UL grant is located is determined according to at least one of the coverage type and the uplink traffic channel PUSCH format, and the value is configured or fixed by the base station, and/ Or the offset value offset determines the value set or the value according to at least one of the coverage type, the period, and the uplink traffic channel PUSCH format, which is configured by the base station or fixed or implicitly determined according to the period.

Specifically, the PUSCH format includes: a single tone transmission format, and a multiple tones transmission format, wherein the single tone transmission format is further divided into a single tone transmission format with different subcarrier spacings. The value set of the period corresponding to the start subframe of the search space where the downlink control channel carrying the UL grant is located is determined according to at least one of the coverage type and the uplink traffic channel PUSCH format, and the value is configured or fixed by the base station, for example, the coverage type. When x3 (such as extreme coverage), the set of period values corresponding to the single tone PUSCH format is {M10, M9, M8, M7}. When configured by the base station, one of the values is configured (signaled by SIB or RRC) to notify the terminal of the period. The value is taken. At this time, the signaling uses 2 bits to indicate the values of the four periods. The case where the period value set corresponding to the multiple tones PUSCH format is an intersection with the period corresponding to the single tone PUSCH format, such as {M8, M7, M6, M5} or the case where there is no intersection, such as {M6, M5, M4, M3}, One of the values is configured by the SIB or RRC to notify the terminal of the period value. The same applies to the PUSCH format corresponding to the subcarrier spacing different from the single tone, such as 3.75 kHz and 15 kHz. The offset value offset determines the value set or the value according to at least one of the coverage type, the period, and the uplink traffic channel PUSCH format, which is configured by the base station or fixed or implicitly determined according to the period. E.g, When the coverage type x3 (such as the extreme coverage), the set of offset values corresponding to the single tone PUSCH format is {z1, z2, z3, z4}. When configured by the base station, one of the values is configured by the SIB or RRC to notify the terminal of the offset value. Or, according to the period implicitly, when the base station configuration period is the set of Mi or Mi, the offset corresponds to the set of zi or zi, and the value or the set of values is determined according to the implicit correspondence table 2, and when determined as the set of values, the base station is determined. Configure one of the values;

table 3

In a specific application scenario, when the base station uses the X bit configuration period M and the offset value offset, when only one of the M and offset is indicated, the base station indicates the 2.^X value set. For example, when only 3 bits are used to indicate M, one of the periods is indicated in the set of values {M0, M1, M2, M3, M4, M5, M6, M7} and determined according to (10*SFN+k)mod M=0. Start subframe. The elements in the M-value set used by different coverage types may be the same or different or partially identical. When M and offset are simultaneously indicated, a set of values of 2.^X {M, offset} is indicated. For example, when 3 bits are used to indicate only M and offset, the set of values {(M0, offset 0), (M1, offset 1), (M2, offset 2), (M3, offset 3), (M4, offset 4), (M5, offset 5) are used. , (M6, offset6), (M7, offset7)} indicates one of the combinations, or the child is indicated in any combination of the period {M0, M1} and {offset0, offset1, offset2, offset3}, and according to (10*SFN) +k+offset) mod M=0 mode determines the starting subframe.

In addition, the subframe set size involved in this embodiment is determined by a fixed or base station configuration. Preferably, when consecutive in the time domain, the starting subframe is the first subframe of the subframe set.

Optionally, when the search space is continuous in the time domain, the subframe used for repeated transmission and the Aggregation Level (AL) are included in one of the following ways:

When there is no subframe set, R subframes are repeatedly transmitted in at least one of AL=1, 2, and 4 within one subframe from the start subframe;

When there is a subframe set, R subframe sets are repeatedly transmitted in the subframe set with at least one of AL=1, 2, 4, 8, 16, 32 from the start subframe; wherein, from the start subframe When starting to repeatedly transmit R subframes or subframe sets, the used subframe is a usable subframe.

In addition, it should be noted that the search space involved in the embodiment includes at least an uplink control search space of an uplink grant UL grant and a downlink control search space of a downlink grant DL grant. The resources used by the uplink control search space and the downlink control search space are completely different resources or resources that are independently configured.

That is, the resource may be a partial subcarrier or a partial OFDM symbol or a partial control channel unit or a subframe or a subframe. The set is followed by a sub-frame as an example. For the two resources are completely different, the subframe resources in the downlink search space are configured in units of available subframes, and the subframe resources used in the uplink search space are not defined in the subframes; or the available subframes in the uplink search space are defined. The downlink search space is used to avoid the use of subframes after the uplink search space is available. For the independent configuration of the two resources, that is, the uplink search space uses the subframe resource and the downlink search space uses resources are independently configured by the base station, and the configuration subframes may be identical or partially identical or completely different.

Moreover, in an alternative embodiment of the present embodiment, the manner in which the terminal detects the initial control channel unit in the search space includes base station configuration or iteration between sub-frames or radio frames or detection windows or search spaces according to a hash function. When repeating transmission, the same control channel unit is used in each subframe/subframe of the repeated transmission.

For this optional implementation, when there is no subframe set, Alt1:AL=4ECCE, the starting subframe determines the starting position, 4ECCE is used in the subframe, the starting is always ECCE index 0; Alt2-1:AL=1, 2, 4ECCE, the initial ECCE is fixed to an integer multiple of the aggregation level or determined by configuration. Repeated transmission of each subframe uses the same ECCE, which is the same as the first subframe; Alt2-2: in the search space (Rmax) or radio frame. Hash calculation, repeated transmission of each subframe uses the same ECCE, the same as the first sub-frame.

Based on this, the composition form of the candidate set in the search space (detecting the minimum granularity of the downlink control channel in the search space) includes one of the following modes:

The candidate set is composed of one or more aggregation levels and multiple repetition times, and the starting subframes corresponding to the candidate sets of different repetition times are the same;

The candidate set is composed of one or more aggregation levels and multiple repetition times, and the start subframe corresponding to the candidate set of different repetition times is different, and the candidate set corresponding to the non-maximum repetition number is multiple in the search space;

The candidate set consists of multiple aggregation levels and one repetition number;

The candidate set is composed of an aggregation level, wherein the candidate set occupies all control channel units of the search space;

The aggregation level corresponding to the candidate set is determined according to different application scenarios, where the scenario includes at least: an Inband scenario and a standalone/guardband scenario.

In another optional implementation manner of this embodiment, some or all resources are used in the window in units of detection windows or scheduling windows when the search space is discrete in the time domain; or, the search space is discrete in the time domain. And when the downlink control channel is repeatedly transmitted, part or all of the resources are used in the window in units of detection windows or scheduling windows, and time domain repetition is performed in the window and/or between the windows. It should be noted that this method is preferred for large coverage; in Normal coverage, the preferred search space is continuously included in the time domain: the search space is continuous in units of subframe sets and/or the search space is continuous in subframes. ; and used in large coverage.

In the detection window or the scheduling window, the downlink control channel is time-division multiplexed with the downlink traffic channel, or the resources used by different coverage types of the downlink control channel are time-division multiplexed.

In the case of repeated transmission, the number of subframes in the search window in the detection window is not repeated or the number of repetitions can be pre-configured. The search space is determined by at least one of the following parameters: a starting subframe, a subframe set, a repetition number, a scheduling window or a number of repetitions in the detection window, a detection period, a sub-band or a sub-carrier position, wherein the search space is determined. The parameters are predefined or fixed Or base station configuration. In an optional implementation manner of this embodiment, the search space may have only one detection window, and the subframe or subframe set is in the defined repetition window, and the repetition number indicates the repetition number of the repetition window, and the repetition is repeated when the transmission is repeated. The window is repeatedly transmitted R times in units, and is repeatedly transmitted R times in the detection window. That is, the repeating window length is greater than the subframe set length, but smaller than the detection window length.

In this embodiment, the manner in which the terminal detects the initial control channel unit in the search space includes: fixed or base station configuration or iterating between subframes or radio frames or detection windows or search spaces according to a hash function, where the transmission is repeated The same control channel unit is used in each subframe/subframe in which the transmission is repeated. The manner in which the base station is configured includes: the user equipment UE-specific RRC configuration start + offset, and all UEs start the same. In an optional implementation of this embodiment, the initial control channel unit index needs to be configured, such as configuring a direct index of the control channel unit in the search space, or configuring a control channel unit start index and offset in the search space.

Based on this, the composition of the candidate set in the search space includes one of the following ways:

A candidate set consists of multiple aggregation levels and one repetition number.

The aggregation level corresponding to the candidate set is determined according to different application scenarios. The scenario includes at least an Inband scenario and a standalone/guardband scenario, and the total number of candidate sets corresponding to each scenario is the same. The number of the candidate sets is determined according to different scenarios, and the determined manner includes: the sum of the number of candidate sets corresponding to different scenarios is the same, and the number of candidate sets corresponding to different scenarios is determined independently;

The number of repetitions involved in the embodiment is determined by the number of repetitions between windows, or by the number of repetitions in the window and the number of repetitions between windows.

It should be noted that the search space involved in this embodiment is time-division multiplexed with different types, different messages, or different users/user groups. In addition, when the search space is in a frequency domain by a part of subcarriers, the frequency division multiplexing method includes at least one of the following: frequency division multiplexing FDM between channels of the same type, FDM between different types of channels, and different coverage types. Inter-FDM, FDM between different message types, and different types of channels are multiplexed in units of enhanced control channel elements ECCE. The manner in which the downlink control channel scheduling indicates the downlink traffic channel in the frequency division multiplexing includes at least one of the following:

Indicates a subsequent occupied subframe position in the same sub-band or sub-carrier position;

Sub-subbands or subcarriers indicate occupied subframe positions in different subbands;

At the same time indicating the subsequent occupied subframe position in the same sub-band or sub-carrier position and the sub-band or sub-carrier indicating the occupied sub-frame position in the different sub-band.

Optionally, when the downlink control channel schedules the downlink traffic channel, the interval between the start subframe of the downlink traffic channel and the end subframe of the downlink control channel is in a subframe or a scheduling window, where the start of the downlink traffic channel The value of the interval between the subframe and the downlink control channel end subframe is a fixed value or a variable value; wherein the value range of the variable value is determined according to at least one of the following parameters: detection period, scheduling window, and coverage Type, physical uplink shared channel PUSCH format.

It should be noted that, when the variable value is notified by the DCI, the value range is a limited set of values, and the elements in the set are determined according to at least one of a detection period, a scheduling window, an overlay level, and a PUSCH format single tone. The range of the value set of k is determined by not exceeding the detection period and the size of the scheduling window. For example, when the detection period is M, the value k is not greater than M, and when the coverage type is determined by the coverage type, different coverage types correspond to respective variable ranges. The value value set, such as the coverage type x3 corresponding to the k value set {k0, k1, k2, k3, k4, k5, k6, k7}, the coverage type x2 corresponding to the k value set and the x3 corresponding value set have an intersection The set of values corresponding to {k4, k5, k6, k7, k8, k9, k10, k11} or its non-intersection is {k8, k9, k10, k11, k12, k13, k14, k15}; the same applies to Different PUSCH formats correspond to respective sets of variable value values. The PUSCH format is as described previously.

In addition, the downlink control channel end subframe is subframe n, and the start subframe of the downlink traffic channel is n+k. When the subframe is used as the scheduling interval, that is, k subframes, k is a fixed value or signaling. The variable value, k set of values is preferably an integer greater than zero. When the scheduling window is used as the interval, the downlink control channel end subframe is the subframe n, the scheduling window is m, the starting subframe of the downlink traffic channel is n+k, and the scheduling window is m+u, where u is greater than An integer equal to 0, where u is a fixed value or a signaled variable value. The signaling is physical layer signaling DCI or higher layer signaling SIB or RRC.

Based on the foregoing manner, when the definition relationship is determined in units of the scheduling window, the scheduling window length is the same or independently determined when the uplink single carrier single tone transmission channel of different subcarrier intervals is different; wherein, the uplink grant UL grant indicates that the uplink traffic channel is in the window. The starting subframe position.

In addition, the uplink grant UL grant indicates uplink single carrier transmission of different subcarrier spacing sizes. For example, 1 bit is used to indicate uplink single carrier transmission of two different subcarrier spacing sizes, such as 3.75 kHz and 15 kHz, or 2.5 kHz and 15 kHz.

In addition, the uplink grant UL grant uses the same resource allocation indication bit field for uplink single carrier transmission of different subcarrier spacing sizes; in addition, the resource allocation bit field size is the same for uplink single carrier transmission with different subcarrier spacing sizes. . Within a certain scheduling window length, the uplink single carrier transmission for the smaller subcarrier spacing is numbered 0-X minimum basic allocation units according to the order in the frequency domain, and is used.

The bit indicates one of them. Similarly, within a certain scheduling window length, the uplink single carrier transmission for a larger subcarrier interval is numbered 0-X minimum basic allocation units according to the order of the first frequency domain or the time domain of the first time domain.

The bit indicates one of them.

Based on the above description, in the specific application scenario of the embodiment, the downlink control channel end subframe is subframe n, the initial subframe of the uplink traffic channel is n+k, and when the subframe is used as the scheduling interval, that is, k children. The frame, k is a fixed value or a signaled variable value, and the k-value set is preferably an integer greater than zero. When the scheduling window is used as the interval, the downlink control channel end subframe is the subframe n, the scheduling window is m, the initial subframe of the uplink traffic channel is n+k, and the scheduling window is m+u, where u is greater than An integer equal to 0, where u is a fixed value or a signaled variable value. The signaling is physical layer signaling DCI or higher layer signaling SIB or RRC. Preferably, the value of u when the scheduling interval is defined by the scheduling window is a fixed value.

The scheduling window has a length N (representing N subframes or N TTIs or N milliseconds), and the value of N is preferably an element in the set {1, 2, 4, 8, 10, 16, 20, 30, 32, 40, 48} Or an integer multiple thereof. The scheduling window length N is a fixed value or the base station is configured through SIB or RRC.

When the scheduling window length is the same when the uplink single carrier transmission channels of different subcarrier intervals are the same, for example, the uplink single carrier has two types of 15Khz and 3.75kHz, and both use the same scheduling window length N. When a PUSCH with a smaller subcarrier spacing is scheduled at this time, the PUSCH starting subframe is the starting subframe of the scheduling window, and when the PUSCH with a larger subcarrier spacing is scheduled, the PUSCH starting subframe is the starting subframe of the scheduling window. Or a partial position in the scheduling window as a starting subframe, for example, {0, 1/4, 2/4, 3/4}×N, preferably indicating a starting subframe in the scheduling window of the PUSCH by 2 bits in the UL grant position.

For the uplink single-carrier transmission channel whose scheduling window length is different in different sub-carrier intervals, the scheduling window length corresponding to the uplink single-carrier transmission of different sub-carrier intervals is independently determined, for example, adopting different fixed values, or the base station respectively passes The independent configuration signaling notifies the value of the scheduling window. At this time, the initial subframe determination manner of the uplink single carrier transmission PUSCH for different subcarrier intervals is, preferably, the starting subframe of the respective scheduling window. It is also possible to further specify the starting subframe position within the window by the UL grant.

It can be seen that the search space is determined in the narrowband system, and the time-division transmission achieves the effect of reducing the blocking rate between the downlink control channels corresponding to different message types and different coverage types, thereby saving unnecessary resource waste. Improve resource use efficiency.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

In this embodiment, a device for determining a search space in a narrowband system is also provided. The device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a structural block diagram of a device for determining a search space in a narrowband system according to an embodiment of the present invention. As shown in FIG. 2, the device includes: an identification module 22 configured to identify a narrowband downlink control channel; a detection module 24, and an identification module a coupling connection is set to detect a search space in which the narrowband downlink control channel is located, and the terminal detects a narrowband downlink control channel in the determined narrowband search space, wherein the search space is searched in units of R subframes or subframes in the time domain. The space is in the frequency domain of M subcarriers in the entire narrowband or narrowband. The R and M value sets are positive integers, and the X subframes included in the subframe set are fixed in X or configurable in the base station.

Optionally, the search space in this embodiment is continuous or discrete in the time domain, where the coverage type supported by the search space includes one or more types, and each coverage type corresponds to a unique R value or one includes multiple R acquisitions. A set of values, R represents the number of repetitions of the downlink control channel. Wherein, the search space continuously includes in the time domain: the search space is continuously in units of subframe sets And/or the search space is continuous in units of subframes.

In an optional implementation manner of this embodiment, the search space is determined by at least one of the following parameters: a start subframe, a subframe set size, a repetition number or a number of subframes, a detection period, a sub-band or a sub-carrier position, Wherein, the parameters determining the search space are predefined or fixed or base station configurations.

The starting subframe is determined according to at least one of the following parameters: a maximum number of repetitions Rmax, an offset value offset, a radio frame number SFN, and a period M; wherein the determined manner includes at least one of the following: the starting subframe number is a frame index index k, and satisfying (10*SFN+k) mod Rmax=0; the starting subframe number is index k, and the subframe satisfying (10*SFN+k) mod N*Rmax=0, N Is a positive integer greater than 0; the starting subframe number is index k, and the subframe satisfying (10*SFN+k) mod M=0, M is a positive integer greater than or equal to Rmax; the starting subframe number is index k And satisfying (10*SFN+k+offset) mod M=0, M is a positive integer greater than or equal to Rmax; the starting subframe number is index k, and satisfies (10*SFN+k+X*offset) a subframe with mod M=0, M is a positive integer greater than or equal to Rmax, and X is a positive integer greater than zero.

The value set of the period corresponding to the start subframe involved is determined according to the coverage type, and the value of the period corresponding to the start subframe is configured or fixed by the base station; and/or the value set of the offset value offset or The value is determined according to the coverage type and/or the period; or, the value of the offset value offset is configured by the base station or fixed or determined according to the period.

And the value set of the period corresponding to the start subframe of the search space where the downlink control channel carrying the UL grant is located is determined according to at least one of the following: the coverage type, the uplink traffic channel PUSCH format, and the search space where the downlink control channel carrying the UL grant is located The value of the period corresponding to the start subframe is configured or fixed by the base station; and/or the value set or value of the offset value offset is determined according to at least one of the following: coverage type, period, uplink traffic channel PUSCH format; Or, the value of the offset value offset is configured by the base station or fixed or implicitly determined according to the period. Wherein, in the case of a large coverage type, the period M and/or the offset value offset is greater than the value of the small coverage type.

In addition, the subframe set size in this embodiment is determined by a fixed or base station configuration. Optionally, when consecutive in the time domain, the starting subframe is the first subframe of the subframe set.

It should be noted that, when the search space is continuous in the time domain, the subframe used for repeated transmission and the intra-subframe aggregation level AL include one of the following modes: when there is no subframe set, starting from the starting subframe in one sub-frame R subframes are repeatedly transmitted in at least one of AL=1, 2, and 4; when there is a subframe set, AL=1, 2, 4, 8, 16 are in the subframe set from the start subframe. And at least one of 32 repeats transmitting R subframe sets; wherein, when R subframes or subframe sets are repeatedly transmitted from the start subframe, the used subframe is a usable subframe.

In another optional implementation manner of the embodiment, the search space includes at least an uplink control search space of an uplink grant UL grant and a downlink control search space of a downlink grant DL grant, where the uplink control search space and the downlink control search space The resources used are completely different resources or resources that are independently configured.

In addition, the composition form of the candidate set in the search space involved in the embodiment includes one of the following manners: the candidate set is composed of one or more aggregation levels and multiple repetition times, and the candidate sets of different repetition times correspond to The starting subframes are the same; the candidate set is composed of one or more aggregation levels and multiple repetition times, and the candidate sets of different repetition times correspond to The starting subframes are different, and the candidate set corresponding to the non-maximum number of repetitions has multiple in the search space; the candidate set is composed of multiple aggregation levels and one repetition number; the candidate set is composed of one aggregation level, wherein the candidate The set occupies all the control channel units of the search space; the aggregation level corresponding to the candidate set is determined according to different application scenarios, wherein the application scenario includes at least: an inband inband scene, a standalone band standalone, and a guard band guardband scene.

When the search space is discrete in the time domain, some or all resources are used in the window in units of detection windows or scheduling windows; or, when the search space is discrete in the time domain and the downlink control channel is repeatedly transmitted, the detection window or The dispatch window is a unit that uses some or all of the resources within the window and performs time domain repeats within the window and/or between the windows.

In the detection window or the scheduling window, the downlink control channel is time-division multiplexed with the downlink traffic channel, or the resources used by different coverage types of the downlink control channel are time-division multiplexed. In the case of repeated transmission, the number of subframes in the search window in the detection window is not repeated or the number of repetitions can be pre-configured. The search space is determined by at least one of the following parameters: a starting subframe, a subframe set, a repetition number, a scheduling window or a number of repetitions in the detection window, a repetition window length, a detection period, a sub-band or a sub-carrier position, wherein the search is determined The way of space is predefined or fixed or base station configuration.

Based on this, the manner in which the terminal detects the initial control channel unit in the search space includes: fixed or base station configuration or iterating between a subframe or a subframe set or a radio frame or a detection window or a search space according to a hash function, where During transmission, the same control channel unit is used in each subframe/subframe in the repeated transmission. The configuration of the base station includes: user equipment UE-specific radio resource control RRC configuration start index and/or offset value offset, all UEs The same is true.

In addition, the composition form of the candidate set in the search space includes one of the following manners: the candidate set is composed of one or more aggregation levels and multiple repetition times, and the start subframe corresponding to the candidate set of different repetition times is the same; The candidate set is composed of one or more aggregation levels and multiple repetition times, and the start subframe corresponding to the candidate set of different repetition times is different, and the candidate set corresponding to the non-maximum repetition number is multiple in the search space; The candidate set is composed of multiple aggregation levels and one repetition number; the candidate set is composed of one aggregation level, wherein the candidate set occupies all control channel units in the search space; the aggregation level corresponding to the candidate set is determined according to different application scenarios, wherein The application scenario includes at least: an inband inband scene, a standalone band standalone, and a guard band guardband scene; wherein the number of repetitions is determined by the number of repetitions between windows, or by the number of repetitions in the window and the number of repetitions between windows.

In still another alternative embodiment of this embodiment, the search spaces are time division multiplexed with different types, different messages, or different groups of users/users. And when the search space is in a frequency domain by a part of subcarriers, the frequency division multiplexing mode includes at least one of the following: frequency division multiplexing FDM between channels of the same type, FDM between different types of channels, different coverage types FDM between FDMs, different message types, and different types of channels are multiplexed in units of enhanced control channel elements ECCE.

The manner in which the downlink control channel scheduling indicates the downlink traffic channel in the frequency division multiplexing includes at least one of: indicating the subsequent occupied subframe position in the same sub-band or sub-carrier position; and indicating the occupation in different sub-bands across the sub-band or sub-carrier Subframe position; simultaneously indicating subsequent occupied subframe positions in the same sub-band or sub-carrier position and cross-sub-band or sub-carrier indicating occupied sub-frame positions in different sub-bands.

When the downlink control channel schedules the downlink traffic channel, the interval between the start subframe of the downlink traffic channel and the end subframe of the downlink control channel is in a subframe or a scheduling window, where the start subframe of the downlink traffic channel is The interval between the end subframes of the downlink control channel is a fixed value or a variable value; wherein the value range of the variable value is based on at least the following parameters A determination: detection period, scheduling window, coverage type, physical uplink shared channel PUSCH format.

When the uplink grant channel is allocated by the uplink grant control downlink grant control channel, the interval between the start subframe of the uplink traffic channel and the end subframe of the downlink control channel is in a subframe or a scheduling window, where the uplink traffic channel starts from The interval between the start subframe and the downlink control channel end subframe is a fixed value or a variable value. Wherein, when the definition relationship is determined in units of the scheduling window, the scheduling window length is the same or independently determined when the uplink single carrier single tone transmission channel of different subcarrier intervals is used. And the uplink grant UL grant indicates the initial subframe position of the uplink traffic channel in the window; the uplink grant UL grant indicates uplink single carrier transmission with different subcarrier spacing sizes; and the uplink grant UL grant transmits uplink single carrier for different subcarrier spacing sizes The same resource allocation indicator bit field is used.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

The invention will now be described in connection with alternative embodiments of the invention;

The present invention provides a method for determining a search space in a narrowband system. The technical solution of the method is as follows: the terminal detects that the search space where the narrowband downlink control channel is located is in a subframe or a subframe set in the time domain. In the frequency domain, the entire narrow band or narrow band middle molecular carrier is used.

It should be noted that the search space in this alternative embodiment generally refers to various application scenarios, such as inband inband, guard band guardband, standalone band standalone, and various coverage types, such as normal, medium, and extreme components. Or a basic unit, the narrowband involved in the alternative embodiment is 200 kHz or 180 kHz. When coexisting with LTE, the physical resource block PRB defined by LTE is used, corresponding to 180 kHz, and the narrow band is 1 PRB, where the number of subcarriers There are 12. When cooperating with LTE in the time domain or working independently, the subframe uses LTE-defined subframes to contain 14 OFDM symbols and lasts for 1 ms in time, and the subframe set is fixed or predefined or base station configured several subframes, subframes The sub-frames included in the set are consecutive sub-frames or discrete sub-frames or consecutive or discrete sub-frames in a certain scheduling period or detection period, and the number of sub-frames may be selected as a set {1, 2, 4, 6, 8, 10, 16, 20} or a subset thereof. The base station configuration includes a manner of configuring the cell-specific type or the UE-specific type using SIB or RRC.

Additionally, the search space is continuous or discrete in the time domain when the overlay enhancement uses duplicate transmission, wherein the coverage enhancement includes one or more coverage types. Each coverage type corresponds to a unique R value or a set of R values.

Optionally, the search space may support only one type of coverage, or all coverage types are supported, and are supported by configuring different repetition times R; wherein each coverage type may only support a unique R value, or support an R A collection of values. The Rs corresponding to different coverage types have independent or overlapping elements in the set when there is a set of values.

For example, when each coverage type uniquely supports an R value, normal coverage corresponds to R1, medium coverage corresponds to R2, and extreme coverage corresponds to R3; when each coverage type supports an R value set, when each value set is independent of each other, For example, the normal coverage corresponds to {R1, R2, R3, and R4}, the medium coverage corresponds to {R5, R6, R7, and R8}, and the extreme coverage corresponds to {R9, R10, R11, and R12}; Normal coverage corresponds to {R1, R2, R3, R4}, medium coverage corresponds to {R3, R4, R5, R6}, and extreme coverage corresponds to {R5, R6, R7, R8}.

The manner of continuously transmitting the search space of the alternative embodiment will be described below;

When the search space is continuous in the time domain, it is divided into a set of existing subframes and a set of subframes that are absent, that is, continuous in units of subframe sets and continuous in units of subframes. 3 is a schematic diagram of a search space that is continuous in the time domain according to an alternative embodiment of the present invention. As shown in FIG. 3, the search space is continuous in the time domain.

In this optional embodiment, the search space may be determined by at least one of a starting subframe, a repetition number or a number of subframes, a detection period, a sub-band, or a sub-carrier position, and the determining manner may be predefined, Fixed, or base station configuration.

The configuration of the base station may be configured by using an SIB or an RRC. For example, the configuration parameters include:

Start subframe: (1) determined by period (such as the first subframe in the period); (2) or period + offset determined;

Length: the number of repetitions (regardless of whether there is a subframe set, the number of repetitions is the number of repetitions in units of subframes or subframes) or the number of subframes (the number of repetitions is equal to the number of subframes when there is no subframe set), when When there are multiple Rs in the search space, the value is based on the maximum value Rmax of R, and the subframe used by the repetition may be a physical subframe or a usable subframe;

Period: This parameter needs to be greater than Rmax. Preferably an integer multiple of Rmax, or an integer multiple + offset;

Sub-band or sub-carrier position: It is only applicable to the case where the search space does not occupy 1 PRB or the entire narrowband in the frequency domain. When configuring the subframe resources, you also need to configure the frequency domain sub-carrier resources, for example, configuration {subframe number S, subcarriers. Number C}; for example: {8 subframe, 3 subcarrier}, {16 subframe, 3 subcarrier}, {32 subframe, 3 subcarrier}; {4 subframe, 6 subcarrier}, {8 subframe, 6 subcarrier}, {16 subframe, 6 subcarrier} and so on.

In addition, in the continuous mode, the sub-frame and intra-frame aggregation levels used for repeated transmissions include one of the following methods:

Manner 1: when there is no subframe set, R subframes are repeatedly transmitted in at least one of AL=1, 2, and 4 in one subframe from the start subframe;

Manner 2: When there is a subframe set, R subframe sets are repeatedly transmitted in the subframe set with at least one of AL=1, 2, 4, 8, 16, 32 from the start subframe;

Wherein, when R subframes or subframe sets are repeatedly transmitted from the start subframe, the subframe is used as a available subframe.

For the above manner 1: in continuous transmission, and there is no subframe set, R subframes are repeatedly transmitted with AL=1, 2, and 4 in one subframe from the start subframe. Further, in the continuous mode, when the subframe set exists, the subframes in the subframe set are consecutive physical subframes or available subframes in the time domain. When the transmission is repeated, the transmission is repeated R times in units of subframe sets. When there is no subframe set, R transmission is repeated R times in units of subframes, that is, R physical subframes or available subframes. The aggregation level uses the maximum aggregation level that can be supported in the subframe or the aggregation level set that does not exceed the maximum aggregation level when there is no subframe set, and the elements in the set are one or more.

For mode 2: when there are subframe set=X subframes, for example, X=2, 4, 8, then from the starting subframe, within the X subframes, AL=1, 2, 4, 8, 16, 32 R × X subframes are repeatedly transmitted. At this time, the subframes in the subframe set are consecutive physical subframes or available subframes. In mode 3, the repeated transmission uses available subframes, that is, the physical subframes are not continuously occupied. Part or all of the spare physical subframe is used as a downlink control channel for transmitting a UL grant or the like. At this point, it is necessary to signal the UE to cooperate, including Two modes: Mode 3-1: The base station configures a cell-specific uplink control subframe set. Mode 3-2: The base station configures a UE-specific downlink control and a subframe set resource used by the service, and then configures a UE-specific uplink control subframe set.

Optionally, the determining manner in which the terminal detects the initial control channel unit in the search space comprises base station configuration or iterating between subframes or radio frames or detection windows or search spaces according to a hash function. When repeating transmission, the same control channel unit is used in each subframe/subframe of the repeated transmission.

For example, when there is no subframe set, Alt1:AL=4ECCE, the starting subframe determines the starting position, 4ECCE is used in the subframe, the starting is always ECCE index 0; Alt2-1:AL=1, 2, 4ECCE, The initial ECCE is fixed to an integer multiple of the aggregation level or determined by configuration. The repeated transmission of each subframe uses the same ECCE, which is the same as the first subframe; Alt2-2: hash calculation in the search space (Rmax) or radio frame, repeated transmission Each subframe uses the same ECCE, which is the same as the first subframe.

When there is a subframe set, Alt1-1: the initial ECCE is fixed to an integer multiple of the aggregation level or determined by configuration. Each subframe is repeatedly transmitted using the same ECCE, which is the same as the first subframe. Alt1-2: Calculated in hashes of search space (Rmax) or radio frames. Repeated transmission of each subframe uses the same ECCE, the same as the first subframe.

There is only one candidate set, which fills up all control channel elements in the search space. That is, there is only one aggregation level, one candidate set (including the sum of frequency domain and time domain granularity).

The aggregation level corresponding to the candidate set is determined according to different application scenarios. For example, the Inband scenario and the standalone/guardband scenario support different aggregation levels, and the sum of the corresponding candidate sets is the same.

The following will describe the way in which the search space is transmitted discretely (blocked);

The search space is discrete in the time domain, and the time domain is repeated in units of detection windows or scheduling windows. FIG. 4 is a schematic diagram of the search space being discrete in the time domain according to an alternative embodiment of the present invention, as shown in FIG. The search space is discrete in the time domain.

Optionally, in the detection window or the scheduling window, the downlink control channel is time-division multiplexed with the downlink traffic channel or the resources used by different coverage types.

The way of time division multiplexing includes the following ways:

Alt1. Control and data TDM, different coverage types TDM within the control area. FIG. 5 is a schematic diagram of time division multiplexing of different coverage types in a control region according to an alternative embodiment of the present invention. As shown in FIG. 5, CE1, CE2, and CE3 indicate different coverage levels, and different coverage levels are in The time domain is distinguished within the control area.

Alt2. Control and data TDM, different coverage types are not distinguished in the control region. Through different R configurations, FIG. 6 is a control and data time division multiplexing according to an alternative embodiment of the present invention, and the control region is no longer time-divisionally multiplexed with different coverage. The schematic diagram is shown in Figure 6. At this time, no distinction is made in the control area.

Alt3. Different coverage types TDM in the scheduling period, control and data TDM in the same coverage type, FIG. 7 is a schematic diagram of different coverage time division multiplexing according to an alternative embodiment of the present invention, and control region and data differentiation time division multiplexing in the same coverage As shown in FIG. 7, different coverage TDM, same coverage control and data TDM, preferably control area before the data area. The control area under Alt4.TDM is discrete in the scheduling window. FIG. 8 is a schematic diagram of control and data time division multiplexing and control region dispersion according to an alternative embodiment of the present invention. As shown in FIG. 8, the control regions are not concentrated and are discrete in the time domain.

In the block transfer mode, it is not important whether the specific subframe position of the control region in the scheduling window is concentrated in the front position of the scheduling window, and the specific occupied subframe number is determined by the subframe configuration. That way, this approach highlights flexibility.

Optionally, the subframe set in the detection window in the search window is not repeated or the number of repetitions is configurable when the transmission is repeated.

For the scheduling window scenario, in principle, there is only one subframe set in each detection window for each UE, at least in the normal coverage scenario. The medium/extreme coverage enhancement further distinguishes between two repetition modes, (1) repeating only between detection windows, and (2) repeating between detection windows and detection windows.

For the mode 1: the detection window does not support repetition, and when there is only one subframe set=X subframes in each detection window, R detection windows are repeatedly transmitted in X subframes from the start subframe. The detection window start subframe is the same as the scheduling window start subframe or later than the scheduling window start subframe.

For the mode 2: the detection window supports repetition, the subframe set=X subframes repeat Rin times in the detection window, repeat Rout times between the detection windows, and repeat the number of transmissions R=Rin×Rout. The detection window start subframe is the same as the scheduling window start subframe or later than the scheduling window start subframe. The search space boundary is determined by Rout_max.

Optionally, the search space is determined by using at least one of a start subframe, a subframe set, a repetition number, a scheduling window or a number of repetitions in the detection window, a detection period, a sub-band, or a sub-carrier position, including a predefined or fixed or base station. Configuration.

The configuration of the base station includes the SIB or the RRC, for example, the configuration parameters include:

Subframe set: {2, 4, 8} in the scheduling period;

Number of repetitions in the dispatch window: The default value is Rin=1, which can be configured 1, 2, 4, 8, limited and the size of the dispatch window.

The initial scheduling window: (1) determines by the period (such as the first scheduling window in the period); (2) or the period + offset determines that the basic unit of the offset is not the scheduling window. Wherein, determining the initial scheduling window can determine the starting subframe according to the subframe set.

Length: (1) Rmax, at this time, the subframe set in the window is not repeated (ie, Rin=1). (2) Rout_max, Rout=Rmax/Rin. At this time, the sub-frame set in the window repeats Rin, and Rout is repeated between the windows. Further divided into physical sub-frames or available sub-frames. Where Rmax={1, 2, 4, 8, 16, 32, 64, 128}

Period: (1) Rin=1, this parameter needs to be greater than Rmax. An integer multiple of Rmax, or an integer multiple + offset is preferred. (2) This parameter needs to be greater than Rout_max, Rout = Rmax / Rin. An integer multiple of Rout_max, or an integer multiple of +offset is preferred.

Sub-band or sub-carrier position: It is only applicable to the case where the search space does not occupy 1 PRB or the entire narrowband in the frequency domain. When configuring the subframe resources, you also need to configure the frequency domain sub-carrier resources, for example, configuration {subframe number S, subcarriers. Number C}. Such as: {8 subframe, 3 subcarrier}, {16 subframe, 3 subcarrier}, {32 subframe, 3 subcarrier}; {4 subframe, 6 subcarrier}, {8 subframe, 6 subcarrier}, {16 subframe, 6 subcarrier}, etc. .

Optionally, the manner in which the terminal detects the initial control channel unit in the search space includes: fixed or base station configuration or iterating between subframes or radio frames or detection windows or search spaces according to a hash function. When repeating transmission, the same control channel unit is used in each subframe/subframe of the repeated transmission. The configuration includes: (1) UE-specific RRC, configuration start + offset, and (2) all UEs start at the same.

Where Alt1: The starting ECCE is calculated in search space (containing one or more scheduling periods) or hash in units of scheduling periods. At the same time, it is guaranteed that the repeated transmission of each subframe set (2, 4, 8) uses the same ECCE, which is the same as the first subframe set.

E.g:

The calculation of the subframe number k by the slot number needs to be revised, and still based on the slot number in the LTE system, then the k calculation needs to be revised to:

(1) The formula is rewritten according to one scheduling period (M-subframe) containing X subframes. The hash iteration is satisfied for ten consecutive scheduling periods.

(2) Re-define k according to the scheduling period (M-subframe) number, and k=0, 1, 2...9 in one M-frame.

Alt2: Fixed to an integer multiple of the aggregation level or determined by configuration, the candidate set start (E) CCE position is fixed to an integral multiple of L (E) CCE positions. (1) UE-specific RRC, configuration start + offset, (2) cell-specific configuration, all UEs start at the same.

Alt3: extreme overrides a special case when Normal overlay is used for repeated transmission. The aggregation level of the occupied subframe set is selected, and the starting ECCE is always index 0 in the subframe set.

Based on the above description, the composition form of the candidate set in the search space in the alternative embodiment includes one of the following ways:

There is only one candidate set, which fills all control channel units in the search space, that is, only one aggregation level and one candidate set (including the sum of frequency domain and time domain granularity);

The aggregation level corresponding to the candidate set is determined according to different application scenarios. For example, the Inband scenario and the standalone/guardband scenario support different aggregation levels, and the sum of the corresponding candidate sets is the same;

The number of repetitions may be determined only by the number of repetitions between windows, or by the number of repetitions in the window and the number of repetitions between windows.

The following describes the contents of CSS and USS.

The search space can be further divided into different types, different messages, and different users/user groups.

Optionally, the CSS and the USS are time-division, and the CSS corresponding to the RAR and the CSS corresponding to the Paging are time-division, different users, or different user groups. The base station configures each of the above search spaces through SIB or RRC. That is, if CSS and USS are overlapped, they can overlap. When CSS and USS are configured, the blind detection complexity is reduced, and the search space itself (starting subframe, period, subframe set, aggregation level) is used for both types. There is no essential difference, just the difference in parameters. For example, the aggregation level corresponding to the CSS is less than the aggregation level corresponding to the USS. For example, the USS/SS performs time division multiplexing on different UEs/UE groups. It is recommended that the CSS perform time division multiplexing on different message types. Available subframe set or physical subframe set used when distinguishing coverage type or not distinguishing coverage type: Alt1: Time division multiplexing different UE/UE group/all UE for USS/SS, FIG. 9 is an embodiment according to the present invention The search space is divided into different types, different messages, and different users/user groups. As shown in FIG. 9, different gray shades indicate different UE/UE groups; Alt2: for CSS, time-division multiplexing different message types, such as As shown in FIG. 9, different gray shades indicate different public message types; Alt3: For different search space types, time division multiplexing USS and CSS, wherein the darkest grayscale is CSS, and the other two grayscales are USS.

The following will describe in detail the contents of the additional FDM;

Optionally, the downlink control channel and the downlink traffic channel may be FDM at the same time as time division multiplexing. Specifically, it includes at least one of the following: FDM between channels of the same type, FDM between different types of channels, FDM between different coverage types, and FDM between different message types.

Wherein, considering that downlink support for single subcarrier transmission is of little significance, it is recommended that the downlink is not subdivided into granularity of a single subcarrier. Considering 1 PRB=4ECCE, it is recommended to perform FDM with 3 subcarrier granularity. At this time, the resource size corresponding to the {1 subframe, 3 subcarrier} granularity after FDM is equivalent to the size of one ECCE resource. It is considered that in order to facilitate SFBC coding, it is preferable to perform FDM with a 2 or 4 subcarrier granularity.

Optionally, the downlink control channel scheduling indicates that the downlink traffic channel mode includes at least one of the following manners:

Wherein, only the subsequent occupied subframe positions in the same sub-band or sub-carrier position are indicated. That is, only the same sub-band or sub-carrier position is indicated across subframes. At this time, the FDM between different coverage types is independent of each other, and is indicated in the same subband at this time. The cross-subframe scheduling interval k may be a fixed value, for example, k=1 is the next subframe or the next scheduling period, and FIG. 10 is a downlink control channel pair downlink when the downlink resource frequency division multiplexing is performed according to an alternative embodiment of the present invention. The traffic channel indicates only a schematic diagram of the subsequent occupied subframe positions in the same sub-band or sub-carrier position on the resource indication, as shown in FIG. 10, or is a variable value, and k is notified in the downlink control information. The subsequent occupied subframe position may be determined by the number of repetitions R or by the basic occupied unit and the number of repetitions R. The basic occupied unit is the number of subframes that the source is encoded and modulated to occupy without being duplicated.

For this approach, only the same sub-band or sub-carrier position is indicated across the subframe. For example, at this time, the NB-PDCCH scheduling NB-PDSCH adopts cross-subframe scheduling. The cross-subframe scheduling interval is fixed or dynamically indicated, and the number of occupied subframes is indicated in the DCI.

The occupied sub-frame positions in different sub-bands are indicated only across sub-bands or sub-carriers. That is, across sub-frames and or across sub-bands or sub-carrier indications. In this case, the downlink selected control channel in the different subbands is the same as the starting subframe of the traffic channel, indicating the number of subframes occupied or the ending subframe position, that is, the sub-mode 1, and the sub-band scheduling in the same subframe. Or preferably, the traffic channel start subframes in different subbands are not the same as the downlink control channel start subframes.

Simultaneously indicating the subsequent occupied subframe positions in the same sub-band or sub-carrier position and the sub-bands or sub-carriers indicating the occupied sub-frame positions in different sub-bands, that is, sub-mode 2, the subsequent sub-frames have the same sub-band and the same/different sub-frames Subband scheduling. A special case is included, that is, sub-mode 3 subsequent sub-frames have the same sub-band and different sub-band scheduling of the same sub-frame.

Wherein, the indication is for a cross-subframe and or a sub-band or sub-carrier. Then, the NB-PDCCH scheduling NB-PDSCH has time-frequency two-dimensional scheduling. Considering the feedback timing alignment, the NB-PDSCH end times of different C subcarriers should remain the same.

Sub-mode 1: Different sub-band scheduling with the same subframe. Only the same subframe scheduling mode 1 is supported. That is, the different C subcarriers, the NB-PDSCH and the NB-PDCCH start subframe are the same. FIG. 11 is a cross-sectional control channel for the downlink traffic channel on the resource indication only when the downlink resource frequency division multiplexing is used according to an alternative embodiment of the present invention. The frequency band indicates a schematic diagram of occupying a subframe position in different sub-bands and the starting subframes are the same. As shown in FIG. 11, the number of subframes in which the PDSCH is occupied in the DCI is required. Applicable to NB-PDCCH and NB-PDSCH full FDM.

Sub-mode 2: Sub-band scheduling of the same sub-band and same/different sub-frames of subsequent sub-frames. Supports the same subframe scheduling mode 3. That is, different C subcarriers, the NB-PDSCH is different from the NB-PDCCH starting subframe, and the same C subcarrier, the NB-PDSCH is transmitted later than the NB-PDCCH. At this time, it is necessary to indicate the number of NB-PDSCH occupied subframes in different C subcarriers. 12 is a downlink control channel for a downlink traffic channel simultaneously indicating a subsequent sub-frame position in the same sub-band or sub-carrier position and a cross-subband or subcarrier on the resource indication according to an alternative embodiment of the present invention. A schematic diagram indicating the positions of occupied subframes in different sub-bands, as shown in FIG. 12, for example: (1) indicates {subcarrier position x, starting subframe y, occupied subframe number r}. (2) A cross-subframe scheduling interval k indicating different C subcarriers, based on the offset of the NB-PDCCH starting subframe position, and indicating the ending subframe.

Sub-mode 3: The same sub-band of the subsequent subframe and the different sub-band scheduling of the same subframe. Supports the same subframe scheduling mode 2. That is, different C subcarriers, the NB-PDSCH is the same as the NB-PDCCH starting subframe, and the same C subcarrier, the NB-PDSCH is transmitted later than the NB-PDCCH. At this time, it is necessary to indicate the number of NB-PDSCH occupied subframes in different C subcarriers. 13 is a downlink control channel for a downlink traffic channel simultaneously indicating a subsequent sub-frame position and a sub-subband or sub-band in the same sub-band or sub-carrier position on the resource indication according to an alternative embodiment of the present invention. Carrier indicates the difference in different subbands A schematic diagram in which the subframe position and the different sub-band start subframes are the same, as shown in FIG. 13, for example: (1) a fixed subframe/interval scheduling interval indication/indication, and indicating the same end subframes of different C subcarriers; The cross-subframe scheduling interval is fixed/indicated, indicating the number of subframes of different C subcarriers, and the number of subframes of the same C subcarrier can be implicitly calculated (R_pdsch−R_pdcch−k). (3) The cross-subframe scheduling interval is fixed/indicated, indicating the number of subframes of the same C subcarrier, and the number of subframes of different C subcarriers can be implicitly calculated (R_pdsch+R_pdcch+k).

The invention will be described in detail below with reference to specific embodiments;

Example 1

This alternative embodiment is directed to the search space continuously occupying a subframe or a subframe set mode.

At this time, the candidate sets of different repetition times in the search space are the same in the time domain corresponding to the starting subframe. At this time, the base station side configures the repeated set {R1, R2, R3, R4} or only configures the remaining R4 to be multiplied according to the factor k, such as k=1/2, 1/4, 1/8, and the like. The aggregation level can be fixed, or different aggregation level sets can be determined according to different coverage types. For example, at this time, the base station of the RRC configuration terminal of the RRC configuration terminal is located in the first subframe of the period C=640 ms, and is located at the subframe position of 10*SFN+subframe index mod 640=0. At this time, the coverage type is medium coverage type, and Rmax=R4=32 is configured. At this time, the remaining R3 to R1 are determined to be 16, 8, and 4 by the factors k=1/2, 1/4, and 1/8, respectively. At this time, the corresponding aggregation level AL=1, 2, 4, 8MCCE.

Different coverage levels are used for different coverage levels, and R sets determined by different Rmax are used. The starting subframes of different Rs are the same, and the total number of candidate sets is not greater than the number of blind detections of Legacy LTE single subframes.

When the search space is determined by the continuous occupied subframe, the search space and the candidate set are as shown in Table 1-1, wherein the consecutive occupied subframes are physical subframes or available subframes.

Table 1-1

The search space and the candidate set are as shown in Table 1-2. The consecutive occupied subframes and the subframes in the subframe set are physical subframes or available subframes. At this time, the base station also needs to configure the number of subframes of the subframe set and the time domain location of the subframe set. Preferably, the subframe set time domain position continuously occupies a corresponding number of subframes from the start subframe in the cycle.

Table 1-2

By using the method of the embodiment, by configuring a narrowband control channel search space that continuously occupies a subframe or a subframe set, time division multiplexing between the downlink control channel and the downlink traffic channel can be implemented, and the LTE system list is implemented in the configured period. Blind detection of the same complexity in the frame.

Example 2

At this time, the candidate sets of different repetition times in the search space are not all the same in the time domain, and the candidate set corresponding to the non-maximum repetition number has multiple starting subframes in the search space. At this time, the base station side configures the repeated set {R1, R2, R3, R4} or only configures the remaining R4 to be multiplied according to the factor k, such as k=1/2, 1/4, 1/8, and the like. The aggregation level can be fixed, or different aggregation level sets can be determined according to different coverage types. For example, at this time, the base station of the RRC configuration terminal of the RRC configuration terminal is located in the first subframe of the period C=640 ms, and is located at the subframe position of 10*SFN+subframe index mod 640=0. At this time, the coverage type is medium coverage type, and Rmax=R4=32 is configured. At this time, the remaining R3 to R1 are determined to be 16, 8, and 4 by the factors k=1/2, 1/4, and 1/8, respectively. At this time, the aggregation level selects the maximum aggregation level supported in the subframe.

The search space and the candidate set are as shown in Table 2-1, where the consecutive occupied subframes are physical subframes or available subframes. At this time, the aggregation level selects the maximum aggregation level supported in one subframe. AL=4ECCE.

table 2-1

When the search space is determined by the continuous occupied subframe set mode, the search space and the candidate set are as shown in Table 2-2, wherein the consecutive occupied subframes and the subframes in the subframe set are physical subframes or available subframes. At this time, the base station also needs to configure the number of subframes of the subframe set and the time domain location of the subframe set. Preferably, the subframe set time domain position continuously occupies a corresponding number of subframes from the start subframe in the cycle. At this time, the aggregation level selects the maximum aggregation level supported by the subframe.

Table 2-2

By using the method of the embodiment, by configuring a narrowband control channel search space that continuously occupies a subframe or a subframe set, multiple time domain candidate set positions in the search space can be selected, and time division between the downlink control channel and the downlink traffic channel can be realized. Multiplexing, and blind detection of the same complexity as in a single subframe of the LTE system is achieved during the configured period.

Example 3

This alternative embodiment is directed to the search space continuously occupying a subframe or a subframe set mode. And the search space configured in different scenarios is different.

In the Inband scenario, there are many REs (Legacy PDCCH, CRS, etc.), which support a larger AL. In the standalone/guardband scenario, the aggregation level including AL=1 is supported. For example, the Inband scene supports AL=2, 4, 8, and 16. The standalone/guardband scene supports AL=1, 2, 4, and 8.

The configuration is the same as the implementation 1 or 2.

The search space and the candidate set are as shown in Table 3-1. The standalone/guardband scene search space and the candidate set are as shown in Table 3-2. A frame is a physical subframe or a usable subframe.

Table 3-1

Table 3-2

The search space and the candidate set are as shown in Table 3-3, and the standalone/guardband scene search space and candidate set are as shown in Table 3-4, where the search space is continuously occupied. Both the frame and the subframe in the subframe are both physical or available. At this time, the base station also needs to configure the number of subframes of the subframe set and the time domain location of the subframe set. Preferably, the subframe set time domain position continuously occupies a corresponding number of subframes from the start subframe in the cycle.

Table 3-3

Table 3-4

By using the method in this embodiment, a narrowband control channel search space of consecutively occupying a subframe or a subframe set is separately configured for different scenarios to adapt to different scenario requirements. The time division multiplexing between the downlink control channel and the downlink traffic channel can be implemented, and the blind detection of the same complexity in the single subframe of the LTE system is implemented in the configured period.

Example 4

This embodiment occupies a subframe set in a continuous scheduling window or a detection window for a search space of time-division transmission. The subframe set is not repeated within the window. That is, repeated transmissions are only repeated between windows.

At this time, the candidate sets of different repetition times in the search space are the same in the time domain corresponding to the starting subframe. At this time, the base station side configures the repeated set {R1, R2, R3, R4} or only configures the remaining R4 to be multiplied according to the factor k, such as k=1/2, 1/4, 1/8, and the like. The aggregation level can be fixed, or different aggregation level sets can be determined according to different coverage types. For example, at this time, the base station of the RRC configuration terminal of the RRC configuration terminal is located in the first scheduling window or detection window of the period C=640 ms (ie, located at detection_window_index mod C/W=0), and the window length is W=20 ms. The frame set is frame set=N, such as N=8. The N subframes may be configured continuously or discontinuously in the time domain, or may be fixed to N subframes starting from the first subframe in the window, where the initial subframe is located in the subframe in the first detection window in the period C. The first subframe of the set. At this time, the coverage type is medium coverage type, and Rmax=R4=16 is configured. At this time, the remaining R3 to R1 are determined to be 8, 4, and 2 by the factors k=1/2, 1/4, and 1/8, respectively. That is, R detection windows are repeatedly transmitted. The aggregation level corresponds to the subframe set, as shown in Table 4-1.

The search space and the candidate set when the transmission is repeated only between the scheduling window or the detection window are as shown in Table 4-1, wherein the subframes occupying the subframe set are physical subframes or available subframes. If Rmax=1, it means non-coverage enhanced scene or no need to repeat transmission scene, and there is no other R value in the search space when Rmax=1.

Table 4-1

By using the method of the embodiment, by configuring a narrow-band control channel search space for time-division transmission, time division multiplexing between the downlink control channel and the downlink traffic channel can be implemented in units of a scheduling window or a detection window, and different coverage scenarios of different channels can be reduced. The blocking rate at the time. And blind detection with the same complexity in a single subframe of the LTE system is implemented in the configured period.

Example 5

This alternative embodiment occupies a set of subframes in a continuous scheduling window or detection window for a search space for time-division transmission. The set of subframes is repeated within the window. That is, repeated transmissions are repeated in the window and repeated between windows.

At this time, the candidate sets of different repetition times in the search space are the same in the time domain corresponding to the starting subframe. Case 1, the number of repetitions in the window is fixed or the number of repetitions between windows is fixed. At this time, the base station side configures the repeated set {R1, R2, R3, R4} or only configures the remaining R4 according to the factor k, such as k=1/2. 1/4, 1/8, etc. The aggregation level can be fixed, or different aggregation level sets can be determined according to different coverage types. For example, at this time, the base station of the RRC configuration terminal of the RRC configuration terminal is located in the first scheduling window or detection window of the period C=640 ms (ie, located at detection_window_index mod C/W=0), and the window length is W=20 ms. The frame set is frame set=N, such as N=8. The N subframes may be configured continuously or discontinuously in the time domain, or may be fixed to N subframes starting from the first subframe in the window, where the initial subframe is located in the subframe in the first detection window in the period C. The first subframe of the set. At this time, the coverage type is medium coverage type, and Rmax=R4=16 is configured. At this time, the remaining values of R3 to R1 are 8, 4, and 2, respectively, by the factors k=1/2, 1/4, and 1/8, and are repeated according to the window. The number of times or the number of repetitions between windows is fixed to calculate another one, such as Rout=R/Rin or Rin=R/Rout. Repeat the transmission of Rout detection windows. The aggregation level corresponds to the subframe set, as shown in Table 5-1. The fixed value may be configured by the base station through SIB or RRC, or implicitly determined according to the coverage level.

Case 1, the search space and the candidate set when the number of repetitions in the window are fixed or the number of repetitions between the windows is fixed are as shown in Table 5-1, wherein the subframes occupying the subframe set are physical subframes or available subframes. If Rmax=1, it means non-coverage enhanced scene or no need to repeat transmission scene. At this time, Rin=1, Rout=1, and there are no other R, Rin, Rout values in the search space when Rmax=1.

Table 5-1

Similarly, in case 2, the number of repetitions in the window and the number of repetitions in the window have a set of values. At this time, both Rin and Rout have a set of values. The total number of repetitions is determined by Rin×Rout, and the set of values can be fixed or the base station can pass the SIB. Or RRC configuration. The Rout times are repeated between the windows, and the Rin times are repeated in the window. The search space and the candidate set of the preferred embodiment are as shown in Table 5-2. The number of blind detections is not greater than the number of blind detections in a single subframe.

Table 5-2

By using the method of the embodiment, by configuring a narrow-band control channel search space for time-division transmission, time division multiplexing between the downlink control channel and the downlink traffic channel can be implemented in units of a scheduling window or a detection window, and different coverage scenarios of different channels can be reduced. The blocking rate at the time. At the same time, the delay can be reduced and the resource utilization can be improved by increasing the number of repetitions in the window.

Example 6

This embodiment occupies a subframe set in a continuous scheduling window or a detection window for a search space of time-division transmission. At this time, the candidate sets of different repetition times in the search space are not all the same in the time domain corresponding to the starting subframe. That is, the candidate set corresponding to the non-Rmax repetition number has multiple starting subframes in the time domain in the search space.

At this time, the base station side configures the repeated set {R1, R2, R3, R4} or only configures the remaining R4 to be multiplied according to the factor k, such as k=1/2, 1/4, 1/8, and the like. The aggregation level can be fixed, or different aggregation level sets can be determined according to different coverage types. For example, at this time, the base station of the RRC configuration terminal of the RRC configuration terminal is located in the first scheduling window or detection window of the period C=640 ms (ie, located at detection_window_index mod C/W=0), and the window length is W=20 ms. The frame set is frame set=N, such as N=8. The N subframes may be configured continuously or discontinuously in the time domain, or may be fixed to N subframes starting from the first subframe in the window, where the initial subframe is located in the subframe in the first detection window in the period C. The first subframe of the set. At this time, the coverage type is medium coverage type, and Rmax=R4=16 is configured. At this time, the remaining R3 to R1 are determined to be 8, 4, and 2 by the factors k=1/2, 1/4, and 1/8, respectively.

Different coverage levels are used for different coverage levels, and R sets determined by different Rmax are used. The starting subframes of different Rs are not all the same, and the total number of candidate sets is not greater than the number of blind detections of Legacy LTE single subframes.

The search space and the candidate set when the transmission is repeated only between the scheduling window or the detection window are as shown in Table 6-1. At this time, R=Rout, where the subframes occupying the subframe set are physical subframes or available subframes. If Rmax=1, it means non-coverage enhanced scene or no need to repeat The scene is transmitted, and there are no other R values in the search space when Rmax=1.

Table 6-1

Similarly, when there are also repetition times in the window, for example, when one of the number of repetitions in the window and the number of repetitions between the windows is a fixed value, the fixed value may be configured by the base station through SIB or RRC. At this time, one of Rin and Rout has a set of values, and the total number of repetitions is R=Rin×Rout, and the set of values may be fixed or the base station may be configured through SIB or RRC.

For a scene in which the number of repetitions in the window is fixed or the number of repetitions between windows is fixed, when Rout is fixed, the position of the Rin time domain candidate set is the same in the window, and FIG. 14 is a Rin time domain candidate set position according to an alternative embodiment of the present invention. A schematic diagram in which the relative positions are the same in the window, as shown in FIG. 14, the search space Rout=4, Rin=1, 2, 4, 8, and Rin=2, one of the time domain candidate set positions is indicated.

The Rout times are repeated between the windows, and the Rin times are repeated in the window. The search space and the candidate set of the preferred embodiment are as shown in Table 6-2. The number of blind detections is not greater than the number of blind detections in a single subframe.

Table 6-2

Similarly, when there are repeated times in the window, the number of repetitions in the window and the number of repetitions in the window have a set of values. At this time, both Rin and Rout have a set of values, and the total number of repetitions is determined by Rin×Rout, and the set of values can be The fixed or base station is configured through SIB or RRC. The Rout times are repeated between the windows, and the Rin times are repeated in the window. The search space and the candidate set of the preferred embodiment are as shown in Table 6-3. The number of blind detections is not greater than the number of blind detections in a single subframe, and the number of aggregation levels or R is required. The number is limited system.

Table 6-3

By using the method of the present embodiment, by configuring a narrowband control channel search space for time-division transmission, time division multiplexing between the downlink control channel and the downlink traffic channel in units of a scheduling window or a detection window may be implemented, and in the time domain. Increase the number of corresponding candidate sets to increase resource utilization.

Example 7

This embodiment occupies a subframe set in a continuous scheduling window or a detection window for a search space of time-division transmission. The number of repetitions and the coverage level are uniquely determined.

The unique determination of the number of repetitions and the coverage level includes: mode one, the window does not support repetition, and the number of repetitions only refers to the repetition between windows, and the R value of the search space is uniquely determined. Method 2: There are repeated times in the window, and R=Rin×Rout is uniquely determined.

For mode 1, the coverage level is differentiated at this time, the number of repetitions is fixed, and the candidate set is composed of {aggregation level, number of candidate sets}. When the coverage level is determined, R is uniquely determined, and there is no longer a set of R values. The search space and candidate set are shown in Table 7-1.

Table 7-1

For the second method, it can be further divided into three cases. In case 1, the number of repetitions in the window and the number of repetitions in the window are fixed, which is the same as the first method. In case 2, the number of repetitions in the window and the number of repetitions between the windows are fixed, and the starting sub-frame of the Rout candidate set is the same. In case 3, the number of repetitions in the window and the number of repetitions between the windows are fixed, and there are a plurality of non-Rout_max candidate set starting subframes.

For Case 2, the candidate set of the number of repetitions Rout in the search space at this time is the same in the time domain corresponding to the starting subframe. For Case 3, the candidate set of the number of repetitions Rout in the search space at this time is not the same in the time domain. At this time, the base station side configures the intra-window or inter-window repetition number set and implicitly obtains another repetition number set according to the fixed R value; or only configures the maximum value of the intra-window or inter-window repetition times to be multiplied according to the factor k, such as k = 1/2, 1/4, 1/8, etc., and another set of repetition times is implicitly obtained from the fixed R value. The aggregation level can be fixed, or different aggregation level sets can be determined according to different coverage types. For example, at this time, the base station of the RRC configuration terminal of the RRC configuration terminal is located in the first scheduling window or detection window of the period C=640 ms (ie, located at detection_window_index mod C/W=0), and the window length is W=20 ms. The frame set is frame set=N, such as N=2. The N subframes may be configured continuously or discontinuously in the time domain, or may be fixed to N subframes starting from the first subframe in the window, where the initial subframe is located in the subframe in the first detection window in the period C. The first subframe of the set. At this time, Rout_max=8 is configured. At this time, the remaining Rout3 to Rout1 are determined to be 4, 2, and 1, respectively, by the factors k=1/2, 1/4, and 1/8. At this time, R=8 is fixed, that is, Rin is implicitly obtained by R/Rout. At this time, the aggregation level corresponds to the subframe set. Different coverage levels are used for different coverage levels. The starting subframes of different Routs are the same, and the total number of candidate sets is not greater than the number of blind detections of Legacy LTE single subframes. The search space and the candidate set are as shown in Table 7-2, in which the subframes occupying the subframe set are physical subframes or available subframes. If Rmax=1, it means non-coverage enhanced scene or no need to repeat transmission scene. Rout=1, Rin=1, and there are no other R, Rout, Rin values in the search space when Rmax=1.

Table 7-2

Unlike the case 2 type, for case 3, the candidate set of different Rout repetition times in the search space at this time is not identical in the time domain corresponding to the start subframe. That is, the candidate set corresponding to the number of non-Rout_max repetitions has multiple starting subframes in the time domain in the search space. The search space and candidate set are shown in Table 7-3.

Table 7-3

By using the method of the embodiment, by configuring a narrowband control channel search space for time-division transmission, time division multiplexing between the downlink control channel and the downlink traffic channel in units of a scheduling window or a detection window can be implemented, in the coverage level and the number of repetitions. When uniquely determined, the frequency domain resource granularity of the candidate set is increased and the maximum number of blind detections is reduced.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1: the terminal determines a narrowband search space location;

S2: The terminal detects a narrowband downlink control channel in the determined narrowband search space, where the search space is in units of R subframes or subframe sets in the time domain, and the search space is in the frequency domain with M subcarriers in the entire narrowband or narrowband. In the unit, where R and M are set to a positive integer, X subframes are included in the subframe set, and the value of X is fixed or the base station is configurable.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

In the process of determining the search space in the narrowband system according to the embodiment of the present invention, the search space in which the narrowband downlink control channel is located is detected, wherein the search space is in units of R subframes or subframe sets in the time domain, and the search space is in frequency. The domain is in units of M subcarriers in the entire narrowband or narrowband, where the set of R and M values is a positive integer, and the subframe set includes X subframes. The value of X is a fixed value or configured by a base station, and is implemented in a narrowband system. How to determine the search space, the effect of reducing the blocking rate between the downlink control channels corresponding to different message types and different coverage types is achieved by time-division transmission, and the control channel search space structure in the LTE system in the related art is not applicable to the frequency domain. The problem of the demand for a NB-IoT narrowband system with a bandwidth of only 1 PRB.

Claims

A method for determining a search space in a narrowband system, comprising:

The terminal detects a search space where the narrowband downlink control channel is located, where the search space is in units of R subframes or subframe sets in the time domain, and the search space is in the frequency domain with M subcarriers in the entire narrowband or narrowband. The unit, where the R and M value sets are positive integers, the subframe set includes X subframes, and the X value is a fixed value or configured by the base station.
The method of claim 1 wherein

The search space is continuous or discrete in the time domain, wherein the search space supports one or more coverage types, and each coverage type corresponds to a unique R value or a set including multiple R values, R Indicates the number of repetitions of the downlink control channel.
The method of claim 2, wherein

The search space continuously includes in the time domain: the search space is continuous in units of subframe sets and/or the search space is continuous in units of subframes.
The method of claim 3, wherein

The search space is determined by at least one of the following parameters: a start subframe, a subframe set size, a repetition number or a number of subframes, a detection period, a sub-band or a sub-carrier position, wherein the parameter of the search space is determined as Predefined or fixed or base station configuration.
The method of claim 4, wherein

The starting subframe is determined according to at least one of the following parameters: a maximum number of repetitions Rmax, an offset value offset, a radio frame number SFN, and a period M; wherein the manner of determining includes at least one of the following:

The starting subframe number is index index k, and the subframe satisfying (10*SFN+k) mod Rmax=0;

The starting subframe number is index k, and the subframe satisfying (10*SFN+k) mod N*Rmax=0, and N is a positive integer greater than 0;

The starting subframe number is index k, and the subframe satisfying (10*SFN+k) mod M=0, and M is a positive integer greater than or equal to Rmax;

The starting subframe number is index k, and satisfies (10*SFN+k+offset) mod M=0, M is a positive integer greater than or equal to Rmax;

The starting subframe number is index k, and satisfies (10*SFN+k+X*offset) mod M=0, M is a positive integer greater than or equal to Rmax, and X is a positive integer greater than 0.
The method of claim 5, wherein

The value set of the period corresponding to the start subframe is determined according to the coverage type, and the period corresponding to the start subframe The value is configured or fixed by the base station; and/or,

The set or value of the offset value offset is determined according to the coverage type and/or the period; or the value of the offset value offset is configured by the base station or fixed or determined according to the period.
The method of claim 5, wherein

The value set of the period corresponding to the start subframe of the search space in which the downlink control channel carrying the UL grant is located is determined according to at least one of the following: an coverage type, an uplink traffic channel PUSCH format, and a search space where the downlink control channel carrying the UL grant is located The value of the period corresponding to the starting subframe is configured or fixed by the base station; and/or,

The value set or the value of the offset value offset is determined according to at least one of the following: an coverage type, a period, an uplink traffic channel PUSCH format; or, the value of the offset value offset is configured by the base station or fixed or implicit according to the period. determine.
The method of claim 7 wherein

In the case of a large coverage type, the period M and/or the offset value offset is greater than the value of the small coverage type.
The method of claim 4 wherein the subframe set size is determined by a fixed or base station configuration.
The method of claim 9, wherein the starting subframe is a first subframe of the subframe set when consecutive in the time domain.
The method of claim 3, wherein

When the search space is continuous in the time domain, the subframe used for repeated transmission and the intra-subframe aggregation level AL include one of the following methods:

When the subframe set does not exist, R subframes are repeatedly transmitted in at least one of AL=1, 2, and 4 in one subframe from the start subframe;

When the subframe set exists, R subframe sets are repeatedly transmitted in the subframe set with at least one of AL=1, 2, 4, 8, 16, 32 from the start subframe;

Wherein, when the R subframes or the subframe set are repeatedly transmitted from the start subframe, the used subframe is a usable subframe.
The method according to claim 1 or 2, wherein

The search space includes at least an uplink control search space of an uplink grant UL grant and a downlink control search space of a downlink grant DL grant.
The method of claim 12, wherein

The resources used by the uplink control search space and the downlink control search space are completely different resources or resources that are independently configured.
The method of claim 3, wherein

The composition form of the candidate set in the search space includes one of the following ways:

The candidate set is composed of one or more aggregation levels and multiple repetition times, and the start subframes corresponding to the candidate sets of different repetition times are the same;

The candidate set is composed of one or more aggregation levels and multiple repetition times, and the start subframe corresponding to the candidate set of different repetition times is different, and the candidate set corresponding to the non-maximum repetition number is in the search space. There are multiple;

The candidate set is composed of multiple aggregation levels and one repetition number;

The candidate set is composed of an aggregation level, wherein the candidate set occupies all control channel units of the search space;

The aggregation level corresponding to the candidate set is determined according to different application scenarios, where the application scenario includes at least an inband inband scenario, a standalone band standalone, and a guard band guardband scenario.
The method of claim 2, wherein when the search space is discrete in the time domain, some or all of the resources are used within the window in units of detection windows or scheduling windows; or, in the search space in the time domain When the discrete and downlink control channels are repeatedly transmitted, some or all of the resources are used in the window in units of detection windows or scheduling windows, and intra-window and/or inter-window time domain repetition is performed.
The method according to claim 15, wherein in the detection window or the scheduling window, the downlink control channel is time division multiplexed with a downlink traffic channel, or resources used by different coverage types of the downlink control channel Time division multiplexing.
The method of claim 15, wherein the number of subframe sets in the search window that are not repeated or repeated in the detection window is pre-configurable when the transmission is repeated.
The method according to claim 15, wherein the search space is determined by at least one of the following parameters: a starting subframe, a subframe set, a repetition number, a scheduling window or a number of repetitions in the detection window, a repetition window length, a detection period a sub-band or sub-carrier location, wherein the manner in which the search space is determined is a predefined or fixed or base station configuration.
The method of claim 15 wherein

The manner in which the terminal detects the initial control channel unit in the search space includes: fixed or base station configuration or iterating between a subframe or a subframe set or a radio frame or a detection window or a search space according to a hash function, where When the transmission is repeated, the same control channel unit is used in each subframe/subframe of the repeated transmission. The configuration of the base station includes: the user equipment UE-specific radio resource control RRC configuration start index and/or offset value offset, All UEs start the same.
The method of claim 15 wherein the composition of the candidate set in the search space comprises one of the following:

The candidate set is composed of one or more aggregation levels and multiple repetition times, and the start subframes corresponding to the candidate sets of different repetition times are the same;

The candidate set is composed of one or more aggregation levels and multiple repetition times, and candidate sets of different repetition times The corresponding starting subframes are different, and the candidate set corresponding to the non-maximum number of repetitions has multiple in the search space;

The candidate set is composed of multiple aggregation levels and one repetition number;

The candidate set is composed of an aggregation level, wherein the candidate set occupies all control channel units of the search space;

The aggregation level corresponding to the candidate set is determined according to different application scenarios, where the application scenario includes at least: an inband inband scenario, an independent use band standalone, and a guard band guardband scenario;

The number of repetitions is determined by the number of repetitions between windows, or by the number of repetitions in the window and the number of repetitions between windows.
The method of claim 1 wherein the search spaces are time division multiplexed with different types, different messages, or different groups of users/user groups.
The method according to claim 1, wherein when the search space is in a frequency domain by a part of subcarriers, the frequency division multiplexing mode comprises at least one of the following: frequency division multiplexing FDM between channels of the same type FDM between different types of channels, FDM between different coverage types, FDM between different message types, and different types of channels are multiplexed in units of enhanced control channel elements ECCE.
The method according to claim 22, wherein the manner in which the downlink control channel scheduling indicates the downlink traffic channel in the frequency division multiplexing comprises at least one of the following:

Indicates a subsequent occupied subframe position in the same sub-band or sub-carrier position;

Sub-subbands or subcarriers indicate occupied subframe positions in different subbands;

At the same time indicating the subsequent occupied subframe position in the same sub-band or sub-carrier position and the sub-band or sub-carrier indicating the occupied sub-frame position in the different sub-band.
The method of claim 1 wherein

When the downlink control channel schedules the downlink traffic channel, the interval between the start subframe of the downlink traffic channel and the end subframe of the downlink control channel is in a subframe or a scheduling window, where the downlink service is The value of the interval between the start subframe of the channel and the end subframe of the downlink control channel is a fixed value or a variable value;

The value range of the variable value is determined according to at least one of the following parameters: a detection period, a scheduling window, an coverage type, and a physical uplink shared channel PUSCH format.
The method of claim 1 wherein

The uplink between the start subframe of the uplink traffic channel and the end subframe of the downlink control channel is in a subframe or a scheduling window, where The value of the interval between the start subframe of the uplink traffic channel and the end subframe of the downlink control channel is a fixed value or a variable value.
The method according to claim 25, wherein, when the definition relationship is determined in units of a scheduling window, the scheduling window length is identical or independently determined at an uplink single carrier single tone transmission channel of different subcarrier spacing.
The method of claim 25, wherein the uplink grant UL grant indicates a starting subframe position of the uplink traffic channel within a window.
The method of claim 25, wherein the uplink grant UL grant indicates uplink single carrier transmission of different subcarrier spacing sizes.
The method of claim 25, wherein the uplink grant UL grant uses the same resource allocation indication bit field for uplink single carrier transmission of different subcarrier spacing sizes.
The method according to claim 1, wherein the search space in which the terminal detects the narrowband downlink control channel is configured by the high layer signaling to be one or more, including at least one of the following:

Only a single process is supported, and the base station configures a search space for the terminal through high layer signaling;

Support multiple processes, and the base station configures a search space for the terminal through high layer signaling;

Supporting multiple processes, the base station configures multiple search spaces for the terminal through high-level signaling, at least one of which is located in a different search space from other processes.
The method according to claim 30, wherein the supporting the plurality of processes, when the base station configures a search space for the terminal by using the high layer signaling, scheduling the downlink traffic channel or the uplink traffic channel by using the downlink control channel in the search space The timing determination method includes at least one of the following:

Determining, by the value set in the first timing value set indicated by the downlink control information carried by the downlink control channel;

The value in the second timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the downlink information indicated by the ith downlink control channel indicates the i-1th downlink control channel. The offset value of the end of the service channel end of the downlink control information scheduled by the bearer is determined, and i is a positive integer greater than one;

The value in the second set of timing values indicated by the downlink control information carried by the first downlink control channel is determined, and the value in the first set of timing values indicated by the downlink information carried by the ith downlink control channel is determined. Determine that i is a positive integer greater than one.
The method according to claim 30, wherein, when a plurality of processes are supported, the base station configures a search space for the terminal by using high layer signaling, and the downlink control channel for scheduling different process traffic channels is located in the same cycle. The scheduling control method for scheduling the downlink traffic channel or the uplink traffic channel in the downlink control channel in the search space includes at least one of the following:

The value of the timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the timing reference point is the first downlink control channel end subframe; and the downlink control information carried by the second downlink control channel indicates The value in the set of timing values is determined, and the timing reference point is an end subframe of the traffic channel scheduled by the first downlink control channel;

Determining, by using a value in the set of timing values indicated by the downlink control information carried by the first downlink control channel, the timing reference point is the end subframe of the first downlink control channel; and carrying the traffic channel scheduled for the first downlink control channel The timing reference point of the channel for feeding back the ACK/NACK is the ending subframe of the traffic channel scheduled by the second downlink control channel, and the offset value is determined by the value in the set of timing values indicated by the downlink control information carried by the first downlink control channel. ;

Determining, by using a value in the set of timing values indicated by the downlink control information carried by the first downlink control channel, the timing reference point is the end subframe of the first downlink control channel; and carrying the traffic channel scheduled for the first downlink control channel The timing reference point of the channel for feeding back the ACK/NACK is the ending subframe of the traffic channel scheduled by the second downlink control channel, and the offset value is determined by the value in the set of timing values indicated by the downlink control information carried by the first downlink control channel. And the timing reference point of the channel carrying the ACK/NACK of the traffic channel scheduled for the second downlink control channel is the end subframe of the channel carrying the ACK/NACK of the traffic channel scheduled for the first downlink control channel, and the offset value And determining, by using a value set in the timing value set indicated by the downlink control information carried by the second downlink control channel.
The method of claim 32, wherein the first downlink control channel is of the same type as the second downlink control channel and is in a search space within the same period.
The method according to claim 30, wherein, in the case of supporting a plurality of processes, when the base station configures a search space for the terminal through high layer signaling, and the downlink control channels for scheduling different types of traffic channels are located in the same cycle, The scheduling timing determining method for scheduling different types of traffic channels in the downlink control channel in the search space includes at least one of the following:

The value of the timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the timing reference point is the first downlink control channel end subframe; and the downlink control information carried by the second downlink control channel indicates The value in the set of timing values is determined, and the timing reference point is an end subframe of the traffic channel scheduled by the first downlink control channel;

The value of the timing value set indicated by the downlink control information carried by the first downlink control channel is determined, and the timing reference point is the first downlink control channel end subframe; and the downlink control information carried by the second downlink control channel indicates The value in the set of timing values is determined, and the timing reference point is an end subframe of a channel carrying ACK/NACK for the traffic channel scheduled for the first downlink control channel;

Determining, by using a value in the set of timing values indicated by the downlink control information carried by the first downlink control channel, the timing reference point is the end subframe of the first downlink control channel; and carrying the traffic channel scheduled for the first downlink control channel The timing reference point of the channel for feeding back the ACK/NACK is the ending subframe of the traffic channel scheduled by the second downlink control channel, and the offset value is determined by the value in the set of timing values indicated by the downlink control information carried by the first downlink control channel. .
The method of claim 34, wherein the first downlink control channel is different from the second downlink control channel type and has a search space within the same period.
A method according to claim 32 or 34, wherein

The set of timing values is a first set of timing values or a second set of timing values or a third set of timing values;

The first timing value set or the second timing value set or the third timing value set is not the same set for the scheduled downlink traffic channel and the scheduled uplink traffic channel; or the first timing value set Or the second timing value set or the third timing value set is a set that is different from the set element for scheduling the downlink traffic channel and scheduling the uplink traffic channel and indicating that the downlink traffic channel feedback ACK/NACK is delayed.
A device for determining a search space in a narrowband system, comprising:

a detecting module, configured to detect a search space where the narrowband downlink control channel is located, wherein the search space is in units of R subframes or subframe sets in the time domain, and the search space is in the entire narrowband or narrowband in the frequency domain The M subcarriers are in units, wherein the R and M value sets are positive integers, and the subframe set includes X subframes, and the X value is a fixed value or configured by the base station.