CN110492972B

CN110492972B - Blind detection control method, device, base station, user equipment and storage medium

Info

Publication number: CN110492972B
Application number: CN201810458245.7A
Authority: CN
Inventors: 许百成; 毕存磊
Original assignee: Beijing Xiaomi Pinecone Electronic Co Ltd
Current assignee: Beijing Xiaomi Pinecone Electronic Co Ltd
Priority date: 2018-05-14
Filing date: 2018-05-14
Publication date: 2022-02-08
Anticipated expiration: 2038-05-14
Also published as: CN110492972A

Abstract

The disclosure relates to a blind detection control method, a blind detection control device, a base station, user equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: for the MPDCCH or NPDCCH, a target PDCCH for transmitting downlink control information DCI is determined on the base station side according to a pre-specified PDCCH set or a pre-configured PDCCH holding period, and the DCI is transmitted to user equipment by using the target PDCCH. Correspondingly, on the user equipment side, a target PDCCH needing blind detection is determined according to a pre-specified PDCCH set or a pre-configured PDCCH retention period, and the target PDCCH is utilized to perform the blind detection of the DCI. The number of the MPDCCHs or NPDCCHs required to be subjected to blind detection by the user equipment can be reduced, so that the blind detection complexity of the user equipment can be reduced, and the blind detection power consumption can be reduced.

Description

Blind detection control method, device, base station, user equipment and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a blind detection control method, apparatus, base station, user equipment, and storage medium.

Background

eMTC (Enhanced Machine-Type Communications) and NB-IoT (Narrow Band Internet of Things) are two cellular Internet of Things technologies defined by 3GPP (3rd Generation Partnership Project), and reducing terminal complexity and power consumption are important issues of common concern for the two technologies.

Taking the eMTC as an example, an MTC Physical Downlink Control Channel (MTC pdcch) is defined in the eMTC to dynamically schedule a PDSCH (Physical Downlink Shared Channel) and a PUSCH (Physical Uplink Shared Channel). The basic resource unit of the MPDCCH is ECCE (Enhanced Control Channel Element, Control Channel Element), various DCI (Downlink Control Information) is carried on the MPDCCH, and a UE (User Equipment) does not know the length of the carried DCI and the position of the ECCE where the MPDCCH is located at the beginning.

Currently, in the blind detection process specified by the 3GPP protocol, no matter the above-mentioned MPDCCH or NPDCCH blind detection process of NB-IoT, in each search time window, the network side (i.e. the base station side) may dynamically select an MPDCCH or an NPDCCH channel to be used according to the channel condition and the network load condition in the search space, and the UE needs to blind detect all possible candidate sets in the search space.

Disclosure of Invention

The disclosure aims to provide a blind test control method, a blind test control device, a base station, user equipment and a storage medium, which are used for solving the problems of high blind test complexity and high power consumption caused by the fact that all possible candidate sets in a search space need to be blind tested when the user equipment is in blind test at present.

In order to achieve the above object, in a first aspect of the present disclosure, there is provided a blind detection control method applied to a base station, the method including:

determining a target PDCCH for sending Downlink Control Information (DCI) according to a pre-configured Physical Downlink Control Channel (PDCCH) resource selection strategy, wherein the PDCCH resource selection strategy comprises a pre-designated PDCCH set or a pre-configured PDCCH retention period, and the PDCCH comprises an MPDCCH based on enhanced machine type communication (eMTC) or an NPDCCH based on narrowband internet of things (NB-IoT);

and transmitting the DCI to user equipment by using the target PDCCH.

Optionally, the PDCCH resource selection policy includes the PDCCH retention period, and the determining, according to the preconfigured PDCCH resource selection policy, a target PDCCH for transmitting DCI includes:

determining whether a selected candidate PDCCH exists in a current search space in a current PDCCH holding period, wherein the candidate PDCCH is a PDCCH selected in the current search space according to a preset scheduling algorithm;

determining the candidate PDCCH as the target PDCCH when the candidate PDCCH exists;

and when the candidate PDCCH does not exist, taking the PDCCH selected in the current search space by using the scheduling algorithm as the target PDCCH.

Optionally, the PDCCH resource selection policy includes the PDCCH retention period, an update window is set in the PDCCH retention period, the starting time of the update window is the same as the starting time of the PDCCH retention period, and the duration of the update window is shorter than the PDCCH retention period;

the determining a target PDCCH for transmitting DCI according to a preconfigured PDCCH resource selection policy includes:

determining whether the current PDCCH is in an updating window in the current PDCCH holding period or not in the current PDCCH holding period;

when the search space is in the updating window, taking the PDCCH selected in the current search space by using a preset scheduling algorithm as the target PDCCH;

when the PDCCH is not in the updating window, taking the selected PDCCH in the updating window as the target PDCCH;

and when a plurality of PDCCHs are selected in the updating window, the PDCCH selected last in the plurality of PDCCHs selected in the updating window is taken as the target PDCCH.

Optionally, a starting subframe of one PDCCH holding period is a subframe satisfying the following condition:

wherein n is_hfIndicating the number of the super system frame, n_fIndicating the system frame number, n_sIndicating the time slot number, alpha_offsetDenotes a start offset factor, and T denotes a PDCCH retention period.

Optionally, the PDCCH resource selection policy includes the pre-designated PDCCH set, and the determining, according to the pre-configured PDCCH resource selection policy, a target PDCCH for transmitting DCI includes:

and determining the PDCCH in the pre-designated PDCCH set as the target PDCCH.

Optionally, the sending the DCI to the user equipment by using the target PDCCH includes:

preferentially utilizing the target PDCCH to transmit the DCI to the user equipment;

and when the DCI is not successfully transmitted by using the target PDCCH, transmitting the DCI to the user equipment by using other PDCCHs except the target PDCCH in the current search space.

setting a PDCCH holding flag bit in the DCI;

and transmitting the DCI to the user equipment by using the target PDCCH, wherein the holding flag bit is used for indicating whether the PDCCH used when the base station transmits the DCI to the user equipment is the same as the PDCCH used when the DCI is transmitted at this time in a time window of a next search space.

In a second aspect of the present disclosure, a blind detection control method is provided, which is applied to a user equipment, and the method includes:

acquiring a target Physical Downlink Control Channel (PDCCH) needing blind detection, wherein the target PDCCH is a PDCCH which is determined according to a pre-configured PDCCH resource selection strategy and is used for sending Downlink Control Information (DCI), the PDCCH resource selection strategy comprises a pre-designated PDCCH set or a pre-configured PDCCH retention period, and the PDCCH comprises an enhanced machine type communication (eMTC) -based MPDCCH or a narrowband internet of things (NB-IoT) -based NPDCCH

And performing blind detection by using the target PDCCH to acquire the DCI sent by the base station.

Optionally, the PDCCH resource selection policy includes the PDCCH retention period, and the acquiring the target PDCCH requiring blind detection includes:

determining whether a PDCCH with the DCI blindly detected exists in a current search space in a current PDCCH maintaining period;

when the PDCCH with the DCI detected in the blind mode exists, taking the PDCCH with the DCI detected in the blind mode as the target PDCCH in the current PDCCH maintaining period;

and when the PDCCH of which the DCI is blindly detected does not exist, taking all PDCCHs in the current search space as the target PDCCH.

Optionally, the PDCCH resource selection policy includes the PDCCH retention period, an update window is set in the PDCCH retention period, the starting time of the update window is the same as the starting time of the PDCCH retention period, and the duration of the update window is shorter than the PDCCH retention period; the acquiring of the target PDCCH needing blind detection comprises the following steps:

when the current search space is in the updating window, all PDCCHs in the current search space are taken as the target PDCCHs;

when not in the update window, taking the PDCCH in which the DCI is blind-detected in the update window as the target PDCCH;

and when a plurality of PDCCHs which have blindly detected the DCI in the updating window are available, taking the PDCCH which has blindly detected the DCI in the updating window finally as the target PDCCH.

Optionally, a starting subframe of one PDCCH retention period is a subframe satisfying the following conditions:

Optionally, the PDCCH resource selection policy includes the pre-designated PDCCH set, and the acquiring the target PDCCH requiring blind detection includes:

and determining the PDCCH in the pre-designated PDCCH set as the target PDCCH.

Optionally, the performing blind detection by using the target PDCCH to acquire the DCI sent by the base station includes:

preferentially utilizing the target PDCCH to carry out blind detection;

and when the DCI is not successfully detected on the target PDCCH, performing blind detection by using other PDCCHs except the target PDCCH in the current search space.

Optionally, before the acquiring the target PDCCH requiring blind detection, the method further includes:

judging whether the DCI is detected in a time window of a last search space in a blind manner;

when the DCI is detected in the time window of the last search space, acquiring the value of a PDCCH (physical Downlink control channel) holding flag bit in the DCI;

determining whether the PDCCH used by the base station for sending the DCI last time is the same as the PDCCH used by the base station for sending the DCI this time according to the value of the PDCCH holding flag bit;

when the PDCCH used when the DCI is transmitted last time is the same as the PDCCH used when the DCI is transmitted this time, the PDCCH used when the DCI is transmitted last time is used for blind detection;

and when the DCI is not detected in a time window of a last search space in a blind manner, or a PDCCH used when the DCI is sent last time is different from a PDCCH used when the DCI is sent this time, executing the step of acquiring the target PDCCH needing the blind detection.

In a third aspect of the present disclosure, there is provided a blind detection control apparatus, applied to a base station, the apparatus including:

a determining module, configured to determine a target PDCCH for sending downlink control information DCI according to a preconfigured physical downlink control channel PDCCH resource selection policy, where the PDCCH resource selection policy includes a pre-specified PDCCH set or a preconfigured PDCCH retention period, and the PDCCH includes an MPDCCH based on enhanced machine type communication eMTC or an NPDCCH based on narrowband internet of things NB-IoT;

and a sending module, configured to send the DCI to a user equipment using the target PDCCH.

Optionally, the PDCCH resource selection policy includes the PDCCH retention period, and the determining module is configured to:

Optionally, the PDCCH resource selection policy includes the PDCCH retention period, an update window is set in the PDCCH retention period, the starting time of the update window is the same as the starting time of the PDCCH retention period, and the duration of the update window is shorter than the PDCCH retention period; the determining module is configured to:

when the current search space is in the updating window, taking the MPDCCH selected in the current search space by using a preset scheduling algorithm as the target PDCCH;

Optionally, the PDCCH resource selection policy includes the pre-designated PDCCH set, and the determining module is configured to:

and determining the PDCCH in the pre-designated PDCCH set as the target PDCCH.

Optionally, the sending module is configured to:

Optionally, the sending module includes:

a setting submodule, configured to set a PDCCH holding flag bit in the DCI;

and a sending submodule, configured to send the DCI to the user equipment by using the target PDCCH, where the holding flag bit is used to indicate whether, in a time window of a next search space, a PDCCH used by the base station when sending the DCI to the user equipment is the same as a PDCCH used when sending the DCI this time.

In a fourth aspect of the present disclosure, there is provided a blind detection control apparatus, applied to a user equipment, the apparatus including:

the system comprises an acquisition module, a detection module and a control module, wherein the acquisition module is used for acquiring a target downlink control channel (PDCCH) needing blind detection, the target PDCCH is a PDCCH which is determined according to a pre-configured Physical Downlink Control Channel (PDCCH) resource selection strategy and is used for sending Downlink Control Information (DCI), the PDCCH resource selection strategy comprises a pre-designated PDCCH set or a pre-configured PDCCH retention period, and the PDCCH comprises an enhanced machine type communication (eMTTC) -based MPDCCH or a narrowband internet of things (NB-IoT) -based NPDCCH;

and the blind detection module is used for carrying out blind detection by using the target PDCCH so as to acquire the DCI sent by the base station.

Optionally, the PDCCH resource selection policy includes the PDCCH retention period, and the obtaining module is configured to:

when the PDCCH which has been blindly detected to the DCI exists, taking the PDCCH which has been blindly detected to the DCI as the target PDCCH;

when the PDCCH which has been blindly detected the DCI does not exist, all PDCCHs in the current search space are used as the target PDCCH in the current PDCCH maintaining period.

Optionally, the PDCCH resource selection policy includes the PDCCH retention period, an update window is set in the PDCCH retention period, the starting time of the update window is the same as the starting time of the PDCCH retention period, and the duration of the update window is shorter than the PDCCH retention period; the obtaining module is configured to:

wherein nh_fIndicating the number of the super system frame, n_fIndicating the system frame number, n_sIndicating the time slot number, alpha_off_setDenotes a start offset factor, and T denotes a PDCCH retention period.

Optionally, the PDCCH resource selection policy includes the pre-designated PDCCH set, and the obtaining module is configured to:

and determining the PDCCH in the pre-designated PDCCH set as the target PDCCH.

Optionally, the blind detection module is configured to:

preferentially utilizing the target PDCCH to carry out blind detection;

Optionally, the apparatus further comprises:

a determining module, configured to determine whether the DCI is blind-detected in a time window of a previous search space before the target PDCCH requiring blind-detection is acquired;

a reading module, configured to obtain a value of a PDCCH retention flag bit in DCI when the DCI is detected in a time window of a previous search space;

a determining module, configured to determine, according to the value of the PDCCH holding flag, whether a PDCCH used by the base station when the DCI is transmitted last time is the same as a PDCCH used when the DCI is transmitted this time;

the blind detection module is further configured to perform blind detection by using the PDCCH used when the DCI was last transmitted when the PDCCH used when the DCI was last transmitted is the same as the PDCCH used when the DCI was transmitted this time;

the obtaining module is further configured to, when the DCI is not blind-detected in a time window of a previous search space, or a PDCCH used when the DCI was last transmitted is different from a PDCCH used when the DCI was transmitted this time, perform the step of obtaining the target PDCCH that needs blind-detection.

In a fifth aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored, which program, when being executed by a processor, carries out the steps of the method according to the first aspect as described above.

In a sixth aspect of the present disclosure, there is provided a base station comprising:

a memory having a computer program stored thereon; and

one or more processors configured to execute the computer program in the memory to perform the steps of the method of the first aspect.

In a seventh aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored, which when executed by a processor, performs the steps of the method of the second aspect described above.

In an eighth aspect of the present disclosure, there is provided a user equipment comprising:

a memory having a computer program stored thereon; and

one or more processors configured to execute the computer program in the memory to perform the steps of the method of the second aspect.

According to the technical scheme, for MPDCCH based on eMTC or NPDCCH based on NB-IoT, a target PDCCH for sending downlink control information DCI is determined on the base station side according to a pre-designated PDCCH set or a pre-configured PDCCH holding period, and the DCI is sent to user equipment by using the target PDCCH. Correspondingly, on the user equipment side, a target PDCCH needing blind detection is determined according to a pre-specified PDCCH set or a pre-configured PDCCH retention period, and the target PDCCH is utilized to perform the blind detection of the DCI. The number of the MPDCCHs or NPDCCHs required to be subjected to blind detection by the user equipment can be reduced, so that the blind detection complexity of the user equipment can be reduced, and the blind detection power consumption can be reduced.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1A is a schematic flow chart diagram illustrating a blind test control method according to an exemplary embodiment of the present disclosure;

fig. 1B is a schematic diagram illustrating a DCI transmission flow according to an exemplary embodiment of the present disclosure;

fig. 2A is a schematic flow chart diagram illustrating another blind test control method according to an exemplary embodiment of the present disclosure;

FIG. 2B is a schematic diagram illustrating a blind inspection flow according to an exemplary embodiment of the present disclosure;

FIG. 3 is a flowchart illustrating a method for selecting a target PDCCH of a base station according to the embodiment shown in FIG. 1;

fig. 4 is a flowchart illustrating a method for selecting a target PDCCH for a user equipment according to the embodiment shown in fig. 1;

FIG. 5A is a flowchart illustrating another method for selecting a target PDCCH of a base station according to the embodiment shown in FIG. 1;

FIG. 5B is a schematic diagram illustrating a relationship between a retention period and an update window according to the embodiment shown in FIG. 5A;

fig. 6 is a flowchart illustrating another method for selecting a target PDCCH for a user equipment according to the embodiment shown in fig. 1;

FIG. 7 is a block diagram illustrating a blind test control apparatus according to an exemplary embodiment of the present disclosure;

FIG. 8 is a block diagram of a transmit module according to the embodiment shown in FIG. 7;

FIG. 9 is a block diagram illustrating another blind test control arrangement according to an exemplary embodiment of the present disclosure;

FIG. 10 is a block diagram illustrating yet another blind test control apparatus according to an exemplary embodiment of the present disclosure;

FIG. 11 is a block diagram illustrating a base station in accordance with an example embodiment;

fig. 12 is a block diagram illustrating a user device in accordance with an example embodiment.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

Before introducing the blind detection control method provided by the present disclosure, an application scenario related to each embodiment of the present disclosure is first introduced. The application scenario may include a base station and a user equipment, where the base station may be an eNodeB (Evolved Node B), the eNodeB is a base station in an LET (Long Term Evolution), and the user equipment may be a smart phone, a tablet computer, an intelligent wearable device, a PDA (Personal Digital Assistant), a portable computer, and the like. In the disclosure, the base station transmits DCI to the user equipment through the selected MPDCCH or NPDCCH, and the user equipment performs blind detection on the selected MPDCCH or NPDCCH which needs to be blind-detected, so as to obtain DCI transmitted by the base station. The following describes a blind test control method provided by the present disclosure.

Fig. 1A is a flowchart illustrating a blind detection control method according to an exemplary embodiment of the present disclosure, which is applied to a base station, and the method includes:

step 101, determining a target PDCCH for sending DCI according to a preconfigured PDCCH resource selection policy, where the PDCCH resource selection policy includes a pre-specified PDCCH set or a preconfigured PDCCH retention period, and the PDCCH includes an eMTC-based MPDCCH or an NB-IoT-based NPDCCH.

That is, it can be understood that, taking application to eMTC as an example, the corresponding MPDCCH resource selection policy may include an MPDCCH set or a preconfigured MPDCCH retention period. When the implementation of the MPDCCH holding period is adopted, the base station may update the MPDCCH according to a preconfigured MPDCCH holding period, for example, in a current search space, the MPDCCH used for transmission may be updated every new MPDCCH holding period that arrives, and if the next MPDCCH holding period is not reached, the MPDCCH that has been selected in the current search space may be used to transmit the DCI. When an implementation of a pre-designated MPDCCH set is employed, the MPDCCH set may contain one or more designated MPDCCH's that may be configured by a higher layer or network side (i.e., base station side).

In addition, the target MPDCCH described herein may be understood as a resource location of the MPDCCH selected for sending DCI, that is, a location of the ECCH, that is, the above-mentioned MPDCCH candidate set, so that the MPDCCH selected by the base station for sending DCI or the MPDCCH selected by the user equipment for blind detection in the following description is actually referred to as the MPDCCH candidate set.

Step 102, transmitting DCI to user equipment by using the target PDCCH.

Also taking an eMTC as an example, fig. 1B shows a DCI transmission flow diagram according to an exemplary embodiment of the present disclosure, and a process of transmitting DCI to a user by a base station using MPDCCH as shown in fig. 1B may include: the method comprises the steps of sequentially performing CRC (Cyclic Redundancy Check) addition, channel coding, rate matching, scrambling, modulation, layer mapping, precoding, RE (Resource Element) Resource mapping, OFDM (Orthogonal Frequency Division Multiplexing) signal generation, modulation and up-conversion on DCI to be transmitted, and then transmitting the processed DCI.

Accordingly, fig. 2A is a flowchart illustrating another blind detection control method according to an exemplary embodiment of the present disclosure, which is applied to a user equipment, and the method includes:

step 201, a target PDCCH needing blind detection is obtained, where the target PDCCH is a PDCCH determined according to a preconfigured PDCCH resource selection policy and used for sending downlink control information DCI, the PDCCH resource selection policy includes a pre-specified PDCCH set or a preconfigured PDCCH retention period, and the PDCCH includes MPDCCH based on eMTC or NPDCCH based on NB-IoT.

Corresponding to step 101, taking application to eMTC as an example, the MPDCCH resource selection policy on the user equipment side may include an MPDCCH set or a preconfigured MPDCCH retention period. When the implementation mode of the MPDCCH holding period is adopted, the MPDCCH holding period on the user equipment side and the MPDCCH on the base station side are kept synchronous, and the user equipment can update the MPDCCH according to the preconfigured MPDCCH holding period, for example, in the current search space, the MPDCCH used for transmission can be updated every new arriving MPDCCH holding period, if the next MPDCCH holding period is not reached, the MPDCCH which has been blind-detected before the DCI in the current search space can be used as the target MPDCCH for subsequent blind-detection, and when the next MPDCCH holding period is reached, the MPDCCH used for blind-detection needs to be reselected. However, according to the above scheme, in one MPDCCH holding period, the MPDCCH used by the base station to transmit DCI is updated only once, and in one MPDCCH holding period, the MPDCCH used for blind detection is also updated only once on the user equipment side, so the base station does not need to reselect the MPDCCH in the entire search space every time the DCI is transmitted, and the user equipment does not need to blind-detect all the mpdchs in the entire search space every time the DCI is transmitted. When an implementation of a pre-designated MPDCCH set is employed, the MPDCCH set may contain one or more designated MPDCCH's that may be configured by the higher layer or base station side. Therefore, when the user equipment performs blind detection, the user equipment only needs to perform blind detection on the one or more appointed MPDCCHs, and the MPDCCHs for the blind detection do not need to be selected in the whole search space.

The above is described with reference to MPDCCH only as an example, and the same is true for NPDCCH of NB-IoT. Therefore, the technical scheme can reduce the number of the MPDCCHs or NPDCCHs required to be subjected to blind detection by the user equipment, thereby reducing the blind detection complexity of the user equipment and reducing the high power consumption of the blind detection.

Step 202, performing blind detection by using the target PDCCH to acquire DCI transmitted by the base station.

Or apply to eMTC as an example, fig. 2B is a schematic diagram of a blind detection flow shown according to an exemplary embodiment of the present disclosure, and as shown in fig. 2B, corresponding to a process in which a base station transmits DCI, a process in which a user equipment performs blind detection by using a target MPDCCH may include:

the user equipment sequentially performs resource de-mapping, channel estimation, channel equalization, MIMO (Multiple Input Multiple Output) demodulation, pre-coding de-decoding, layer de-mapping, demodulation, descrambling, rate de-matching, channel decoding and CRC (cyclic redundancy check) on the selected target MPDCCH to detect whether DCI exists. And when the DCI cannot be detected on one MPDCCH, repeating the process until the DCI is detected or all target MPDCCHs are blindly detected.

According to the technical scheme, for MPDCCH based on eMTC or NPDCCH based on NB-IoT, a target PDCCH for sending downlink control information DCI is determined on the base station side according to a pre-designated PDCCH set or a pre-configured PDCCH holding period, and the DCI is sent to user equipment by using the target PDCCH. Correspondingly, on the user equipment side, a target PDCCH needing blind detection is determined according to a pre-specified PDCCH set or a pre-configured PDCCH retention period, and the target PDCCH is utilized to perform the blind detection of the DCI. The number of the MPDCCHs or NPDCCHs required to be subjected to blind detection by the user equipment can be reduced, so that the blind detection complexity of the user equipment can be reduced, and the blind detection power consumption is reduced.

In a first implementation manner, fig. 3 is a flowchart illustrating a method for selecting a target PDCCH for a base station according to the embodiment shown in fig. 1, where the method is applicable to MPDCCH or NPDCCH, and taking the PDCCH resource selection policy including a PDCCH retention period as an example, the step of determining the target PDCCH for transmitting DCI according to the preconfigured PDCCH resource selection policy in step 101 may include the following steps:

in step 1011a, in the current PDCCH retention period, it is determined whether there is a selected PDCCH candidate in the current search space, where the PDCCH candidate is a PDCCH selected in the current search space according to a preset scheduling algorithm.

Wherein, the starting subframe of a PDCCH retention period is a subframe satisfying the following conditions:

wherein n is_hfIndicating the number of the super system frame, n_fIndicating the system frame number, n_sIndicating the time slot number, alpha_offsetIndicating the start offset factor.

That is, each time a subframe satisfies the above condition, it means that a new PDCCH holding period is currently entered, and steps 1011a to 1013a need to be executed again.

In step 1012a, when the candidate PDCCH exists, the candidate PDCCH is determined as the target PDCCH. Wherein the candidate PDCCH is determined as the target PDCCH, it should be understood that the candidate PDCCH is determined as the target PDCCH in the current PDCCH holding period, and the target PDCCH needs to be reselected when the next PDCCH holding period is reached.

And a step 1013a, when the candidate MPDCCH does not exist, taking the PDCCH selected in the current search space by using the scheduling algorithm as the target PDCCH.

Taking the MPDCCH as an example, in the foregoing steps 1011a to 1013a, in an MPDCCH holding period, if there is an already selected MPDCCH (which may be selected when the DCI was last transmitted) in the current search space, the currently transmitted DCI directly utilizes the already selected MPDCCH, and if there is no already selected MPDCCH (for example, a DCI may not be transmitted before), the preset scheduling algorithm selects an MPDCCH currently used for transmitting the DCI in the current search space, and the same applies to the NPDCCH. Therefore, the MPDCCH or NPDCCH can be considered to be updated once in one MPDCCH or NPDCCH holding period, so as to reduce the complexity of blind detection on the user equipment side.

Fig. 4 is a flowchart illustrating a method for selecting a target PDCCH for a user equipment according to the embodiment shown in fig. 1, where the method is applicable to MPDCCH or NPDCCH, and for example, a PDCCH resource selection policy includes a PDCCH retention period corresponding to the embodiment shown in fig. 3, where the step of acquiring the target PDCCH requiring blind detection in step 201 may include the following steps:

in step 2011a, in the current PDCCH holding period, it is determined whether there is a PDCCH for which DCI has been blindly detected in the current search space.

As with the base station side, for the user equipment, the starting subframe of one PDCCH retention period is a subframe that also satisfies the following condition:

wherein n is_hfRepresenting a super systemFrame number, n_fIndicating the system frame number, n_sIndicating the time slot number, alpha_offsetDenotes a start offset factor, T denotes a PDCCH retention period,

indicating a rounding down operation. That is, each time a subframe satisfies the above condition, it indicates that a new PDCCH holding period is currently entered, and T indicates a PDCCH holding period, steps 1021a-1023a need to be executed again.

The PDCCH holding period of the ue side and the PDCCH holding period of the base station side should be kept synchronized.

In step 2012a, when there is the PDCCH that has been blind-detected to DCI, the PDCCH that has been blind-detected to DCI is used as the target PDCCH in the current PDCCH holding period. That is, the PDCCH for which the DCI is blindly detected in the current PDCCH holding period is used as the target PDCCH in the current PDCCH holding period, and when the PDCCH reaches the next PDCCH holding period, the determination in step 2011a needs to be performed again.

In step 2013a, when there is no PDCCH for which DCI has been blindly detected, all PDCCHs in the current search space are set as target PDCCHs.

Or taking the MPDCCH as an example, corresponding to the process of selecting the MPDCCH on the base station side, in the foregoing steps 1021a to 1023a, if the MPDCCH of the DCI is successfully detected in the previous blind detection subframe in the current search space in one MPDCCH holding period, the MPDCCH of the DCI successfully detected before is used as the MPDCCH for the current blind detection; if the MPDCCH for which DCI was successfully detected before does not exist in the current search space, blind detection is performed on all MPDCCH in the entire current search space (for example, it may be the first blind detection in the current MPDCCH retention period). Therefore, the MPDCCH or the NPDCCH is updated once in an MPDCCH or NPDCCH holding period, so as long as the user equipment successfully performs blind detection once, the MPDCCH or the NPDCCH which has been successfully performed blind detection before can be used in the subsequent blind detection process in the holding period, and therefore the complexity of blind detection on the user equipment side can be reduced, and the blind detection power consumption is reduced.

In a second implementation manner, fig. 5A is a flowchart illustrating another method for selecting a target PDCCH for a base station according to the embodiment shown in fig. 1, where the method is applicable to MPDCCH or NPDCCH, the PDCCH resource selection policy includes a PDCCH holding period, an update window is set in the PDCCH holding period, a starting time of the update window is the same as a starting time of the PDCCH holding period, and a duration of the update window is less than the PDCCH holding period. The step of determining a target PDCCH for transmitting DCI according to the preconfigured PDCCH resource selection policy in step 101 may include the following steps:

in step 1011b, it is determined whether the current PDCCH holding period is within the update window of the current PDCCH holding period.

In this embodiment, the conditions that need to be satisfied by the PDCCH holding period are the same as those in step 1011a, and are not described again.

And 1012b, when the search space is in the update window, using the PDCCH selected in the current search space by using a preset scheduling algorithm as a target PDCCH.

And a step 1013b of, when the PDCCH is not within the update window, setting the PDCCH selected within the update window as the target PDCCH. And when the selected PDCCH is multiple in the updating window, the PDCCH selected last in the multiple PDCCHs selected in the updating window is used as a target PDCCH.

The scheme provided by the embodiment can be understood as increasing the update window in the PDCCH retention period on the basis of the method shown in fig. 3. I.e., the PDCCH can be updated within one PDCCH holding period and within its update window.

Taking MPDCCH as an example, fig. 5B is a schematic diagram illustrating a relationship between a holding period and an update window according to the embodiment shown in fig. 5A, and as shown in fig. 5B, in an MPDCCH holding period T, the update window T is set to be smaller than the update window T_updateIs the same as the start time of the hold period T, and T_updateIs shorter than the retention period T, i.e. it can be understood that every time a new MPDCCH retention period T is entered, only at the beginning T_updateMPDCCH may be updated. Therefore, the base station needs toWhen DCI is transmitted, firstly, whether an update window T of an MPDCCH retention period T is currently in is determined_updateWhen in the update window T_updateWhen the search time is short, the MPDCCH selected in the current search space by using a preset scheduling algorithm is used as the MPDCCH for transmitting DCI; when in the non-update window T_updateIntra-time (still within the current MPDCCH retention period T, but the update window T has elapsed_updateAnd therefore no longer updated), will be in the previous update window T_updateThe selected MPDCCH is used as the MPDCCH for transmitting DCI. The scheme is the same for NPDCCH. Therefore, in an MPDCCH or NPDCCH holding period, the MPDCCH or NPDCCH can be limited to update the window T_updateAnd performing internal updating to reduce the complexity of blind detection on the user equipment side. Wherein, the specification is required if the window T is updated_updateAnd if a plurality of target MPDCCHs are selected, the selected MPDCCH is used as the MPDCCH for transmitting the DCI.

Fig. 6 is a flowchart illustrating another method for selecting a target PDCCH for a user equipment according to the embodiment shown in fig. 1, where the method is applicable to MPDCCH or NPDCCH, and corresponding to the embodiment shown in fig. 5A, a PDCCH resource selection policy also includes a PDCCH holding period and an update window in the PDCCH holding period, where a starting time of the update window is the same as a starting time of the PDCCH holding period, and a duration of the update window is smaller than the PDCCH holding period, and the step of acquiring the target PDCCH requiring blind detection in step 201 may include the following steps:

in step 2011b, it is determined whether the current PDCCH holding period is within an update window of the current PDCCH holding period.

In this embodiment, the conditions that the PDCCH retention period needs to satisfy are the same as those in step 2011a, and are not described again.

In step 2012b, when the search space is within the update window, all PDCCHs in the current search space are set as target PDCCHs.

And 2013b, when the current PDCCH is not in the updating window, using the PDCCH with the DCI which is detected in the updating window in a blind mode as a target PDCCH. And when a plurality of PDCCHs are detected in the updating window in a blind mode, the PDCCH which detects the DCI in the updating window in the blind mode finally is used as a target PDCCH.

Taking MPDCCH as an example, the relationship between the MPDCCH holding period and the update window in this embodiment may be as shown in fig. 5B. As with the base station side, it updates the window T within one MPDCCH holding period T_updateIs the same as the start time of the hold period T, and T_updateIs shorter than the holding period T. And, the holding period T and the update window T of the user equipment side_updateKeeping period T and updating window T with base station side_updateSynchronization should be maintained.

Therefore, every time a new MPDCCH holding period T is entered, the base station side is only at the beginning T_updateMPDCCH may be updated. Therefore, when the ue is to perform blind detection, it first determines whether the current ue is in an update window T of an MPDCCH retention period T_updateWhen in the update window T_updateIn the inner time, because the MPDCCHs of the DCI transmitted by the base station are possible to be changed, blind detection is carried out on all the MPDCCHs in the whole current search space; when not in the update window T_updateIn the inner time, since the MPDCCH for the base station to send the DCI is the previous MPDCCH, the blind detection may be performed on the MPDCCH on which the DCI has been detected in the previous blind detection. Therefore, in an MPDCCH or NPDCCH holding period, the MPDCCH or NPDCCH can be limited to update the window T_updateAnd performing internal updating to reduce the complexity of blind detection on the user equipment side.

In a third implementation manner, the PDCCH resource selection policy may include a pre-specified PDCCH set, where the PDCCH may include one or more PDCCHs pre-configured by a higher layer or a base station, and the scheme is applicable to MPDCCH and NPDCCH, and correspondingly, the step of determining a target PDCCH for transmitting DCI according to the pre-configured PDCCH resource selection policy in step 101 may include: and determining the PDCCH in the preassigned PDCCH set as a target PDCCH.

Taking MPDCCH as an example, when the base station transmits DCI, if there is preconfigured MPDCCH, the base station transmits DCI by using preconfigured MPDCCH.

Correspondingly, the acquiring the target PDCCH requiring blind detection in step 201 includes: and determining the PDCCH in the preassigned PDCCH set as a target PDCCH.

Also taking the MPDCCH as an example, when the user equipment performs blind detection, it may be determined whether there is an MPDCCH configured in advance by a higher layer or a base station side in the current search space, and if there is a preconfigured MPDCCH, the blind detection is performed on the preconfigured MPDCCH. Therefore, the user equipment does not need to perform blind detection on all the MPDCCHs in the whole current search space, the blind detection complexity of the user equipment can be reduced, and the blind detection power consumption is reduced.

Further, the base station may preferentially utilize the preconfigured PDCCH to transmit the DCI, and use other PDCCHs in the current search space as the standby PDCCH, and accordingly, step 102 may include:

preferentially utilizing the target PDCCH to send DCI to the user equipment; and when the DCI is not successfully transmitted by using the target PDCCH, transmitting the DCI to the user equipment by using other PDCCHs except the target PDCCH in the current search space.

The user equipment side can preferentially utilize the target PDCCH for blind detection, and when the DCI is not successfully detected on the target PDCCH, other PDCCHs except the target PDCCH in the current search space are utilized for blind detection. The above scheme is applicable to both MPDCCH and NPDCCH, and MPDCCH is taken as an example below:

the base station can take one or more pre-configured MPDCCHs as a preferred MPDCCH, preferentially benefits the pre-configured MPDCCH to transmit DCI, and takes other MPDCCHs in the current search space as standby MPDCCHs; correspondingly, when the user equipment performs blind detection, the blind detection is preferentially performed on the preconfigured MPDCCH, and when the preconfigured MPDCCH does not detect DCI, the blind detection is performed on other MPDCCHs in the current search space.

It should be noted that, in the third implementation manner, for a Specific search space (UE-Specific search space) of the UE, the base station may configure an MPDCCH, which is required to be blind-detected by the UE, in a Radio Resource Control (RRC) signaling.

In addition, in the scheme of indicating the MPDCCH in the preconfigured manner, the indication of the MPDCCH may be implemented in a form of uniformly numbering the MPDCCH. By way of example, the numbering convention may include: firstly, according to the ECCH starting position from low to high, then considering the Aggregation Level (Aggregation Level) from low to high, then considering the Repetition Level (Repetition Level) from low to high, then considering the PRB (Physical Resource Block) set, wherein for the PRB set, firstly considering the 2PRBs set, then considering the 4PRBs set, and then considering the 2+4PRBs set. Illustratively, Table 1 is a table for MPDCCH in Table9.1.5-1b in 3GPP protocol TS 36.213.

TABLE 1

Wherein MPDCCH PRB set represents the above-mentioned MPDCCH PRB set, R represents a repetition level, L' represents an aggregation level,

the number of MPDCCH required for blind detection of the ue under different repeated registrations corresponding to PRB set p (0 or 1) and aggregation level L' is shown, and 16 cases requiring blind detection are listed in the whole table. As an example, as can be seen from table 1, when R ═ R1 and L ═ 2 are set for 2PRB, 1 MPDCCH needs blind detection.

The numbering results shown in table 2 can be obtained by numbering MPDCCH in table 1 according to the above numbering principles.

TABLE 2

Therefore, the base station side or the higher layer can indicate the MPDCCH by the above numbers. The user equipment can perform MPDCCH demodulation according to this numbering order, and can solve the correct MPDCCH in advance and end (i.e. DCI is detected).

Optionally, in a fourth implementation manner, the sending DCI to the user equipment by using the target PDCCH in step 102 may include: setting a PDCCH holding flag bit in the DCI; the DCI is then transmitted to the user equipment using the target PDCCH.

That is, the DCI transmitted by the base station may include a PDCCH holding flag bit, where the PDCCH used by the base station to transmit the DCI to the user equipment is the same as the PDCCH used by the base station to transmit the DCI this time in the time window of the next search space.

Correspondingly, on the user equipment side, before acquiring the target PDCCH requiring blind detection, the method illustrated in fig. 2 may further include the following steps:

first, it is determined whether DCI is detected blindly in a time window of a previous search space. When the DCI is detected in the time window of the last search space, the value of the PDCCH holding flag bit in the DCI is acquired.

And secondly, determining whether the PDCCH used by the base station for transmitting the DCI last time is the same as the PDCCH used for transmitting the DCI this time according to the value of the PDCCH holding flag bit. When the PDCCH used when the DCI is transmitted last time is the same as the PDCCH used when the DCI is transmitted this time, the PDCCH used when the DCI is transmitted last time is used for blind detection; when the DCI is not detected in the time window of the previous search space in a blind manner, or the PDCCH used when the DCI was transmitted last time is different from the PDCCH used when the DCI was transmitted this time, step 201 and step 202 are executed again, or the blind detection may be performed in the entire search space.

That is, when the ue performs the current blind detection, it may first determine whether the current ue is scheduled in the previous search space time window, that is, whether the base station has sent DCI to the current ue in the previous search space time window, if the DCI has been sent in the previous search space time window, determine whether the PDCCH used by the DCI sent by the current base station is changed according to the value of the PDCCH holding flag bit in the DCI, if the PDCCH is not changed, the ue may perform the blind detection on the last PDCCH, and if the PDCCH is changed, the ue may determine the PDCCH used for the blind detection by using the methods shown in steps 201 to 202, or perform the blind detection in the entire search space. The above procedure is applicable to both MPDCCH and NPDCCH.

Taking the application to the eMTC as an example, one bit may be added to the DCI to serve as an MPDCCH holding flag, for example, defined as MPDCCH _ keep _ flag, and then:

if the MPDCCH _ keep _ flag is 1, indicating that the base station uses the same MPDCCH in the time window of the next MPDCCH search space, if the base station has DCI to send to the user equipment;

if MPDCCH _ keep _ flag is 0, which indicates that in the time window of the next MPDCCH search space, if the base station has DCI to send to the user equipment, the base station may use an MPDCCH different from this time.

If the MPDCCH _ keep _ flag indicates that the base station uses the same MPDCCH as the current blind detection, the user equipment performs the blind detection on the MPDCCH of the DCI blind detection last time; if the MPDCCH _ keep _ flag indicates that the base station may use an MPDCCH different from this time, the ue performs blind detection on all mpdchs in the entire search space. The time window refers to a preset receiving time range of the MPDCCH, for example, it is known that the MPDCCH may be transmitted (DCI) between time a and time B, and may fill the entire interval between time a and time B, or a period of time within the interval.

Therefore, whether the MPDCCH used by the base station when the DCI is sent next time is changed or not can be indicated through the DCI, when the MPDCCH is not changed, the user equipment does not need to perform blind detection on all the MPDCCHs in the whole current search space, and only the MPDCCH on which the DCI is blindly detected last time is needed to perform blind detection, so that the blind detection complexity of the user equipment can be reduced, and the blind detection power consumption is reduced.

Fig. 7 is a block diagram of a blind detection control apparatus according to an exemplary embodiment of the present disclosure, which is applied to a base station, and the blind detection control apparatus 700 may include:

a determining module 701, configured to determine a target PDCCH for transmitting DCI according to a preconfigured PDCCH resource selection policy, where the PDCCH resource selection policy includes a pre-specified PDCCH set or a preconfigured PDCCH retention period, and the PDCCH includes eMTC-based MPDCCH or NB-IoT-based NPDCCH;

a sending module 702, configured to send DCI to the user equipment using the target PDCCH.

Optionally, the PDCCH resource selection policy includes the PDCCH retention period, and the determining module 701 is configured to:

determining whether a selected candidate PDCCH exists in a current PDCCH holding period, wherein the candidate PDCCH is a PDCCH selected in a current search space according to a preset scheduling algorithm;

when the candidate PDCCH exists, determining the candidate PDCCH as a target PDCCH;

and when the candidate PDCCH does not exist, taking the PDCCH selected in the current search space by using the scheduling algorithm as a target PDCCH.

Optionally, in another implementation manner, the PDCCH resource selection policy includes the PDCCH retention period, an update window is set in the PDCCH retention period, the starting time of the update window is the same as the starting time of the PDCCH retention period, and the duration of the update window is shorter than the PDCCH retention period; the determining module 701 may be configured to:

in the current PDCCH maintaining period, determining whether the current PDCCH is in an updating window in the current PDCCH maintaining period;

when the search space is in the updating window, taking the PDCCH selected in the current search space by using a preset scheduling algorithm as a target PDCCH;

when the PDCCH is not in the updating window, the selected PDCCH in the updating window is taken as a target PDCCH;

and when a plurality of PDCCHs are selected in the updating window, the PDCCH selected last in the plurality of PDCCHs selected in the updating window is taken as a target PDCCH.

wherein n is_hfIndicating the number of the super system frame, n_fIndicating system frame number，n_sIndicating the time slot number, alpha_offsetDenotes a start offset factor, and T denotes a PDCCH retention period.

Optionally, in another implementation manner, the PDCCH resource selection policy includes a pre-specified PDCCH set, and the determining module 701 is configured to:

and determining the PDCCH in the preassigned PDCCH set as a target PDCCH.

Optionally, the sending module 702 may be configured to:

preferentially utilizing the target PDCCH to send DCI to the user equipment;

Optionally, fig. 8 is a block diagram of a sending module according to the embodiment shown in fig. 7, where the sending module 702 may include:

a setting submodule 7021 configured to set a PDCCH holding flag bit in the DCI;

a sending submodule 7022, configured to send DCI to the user equipment using the target PDCCH, and hold a flag bit to indicate whether, in a time window of a next search space, a PDCCH used when the base station sends DCI to the user equipment is the same as a PDCCH used when the base station sends DCI this time.

Fig. 9 is a block diagram of another blind detection control apparatus according to an exemplary embodiment of the present disclosure, which is applied to a user equipment, and the blind detection control apparatus 900 may include:

an obtaining module 901, configured to obtain a target PDCCH requiring blind detection, where the target PDCCH is a PDCCH determined according to a preconfigured PDCCH resource selection policy and used for sending DCI, the PDCCH resource selection policy includes a pre-specified PDCCH set or a preconfigured PDCCH retention period, and the PDCCH includes an eMTC-based MPDCCH or an NB-IoT-based NPDCCH;

a blind detection module 902, configured to perform blind detection on the target PDCCH to obtain DCI sent by the base station.

Optionally, in an implementation manner, the PDCCH resource selection policy includes the PDCCH retention period, and the obtaining module 901 may be configured to:

when the PDCCH with the DCI which is detected in the blind mode exists, taking the PDCCH with the DCI which is detected in the blind mode as a target PDCCH in the current PDCCH holding period;

and when the PDCCH of which the DCI is blindly detected does not exist, taking all PDCCHs in the current search space as target PDCCHs.

Optionally, in another implementation manner, the PDCCH resource selection policy includes the PDCCH retention period, an update window is set in the PDCCH retention period, the starting time of the update window is the same as the starting time of the PDCCH retention period, and the duration of the update window is shorter than the PDCCH retention period; the obtaining module 901 may be configured to:

when the search space is in the updating window, taking all PDCCHs in the current search space as target PDCCHs;

when the PDCCH is not in the updating window, the PDCCH of which the DCI is detected in the updating window in a blind mode is taken as a target PDCCH; when there are a plurality of PDCCHs on which the DCI has been blind-detected in the update window, the PDCCH on which the DCI has been blind-detected last in the update window is used as a target PDCCH.

Optionally, in another implementation manner, the PDCCH resource selection policy includes the pre-designated PDCCH set, and the obtaining module 901 may be configured to:

and determining the PDCCH in the preassigned PDCCH set as a target PDCCH.

Optionally, the blind detection module 902 may be configured to:

preferentially utilizing the target PDCCH to carry out blind detection;

Optionally, fig. 10 is a block diagram illustrating another blind detection control apparatus according to an exemplary embodiment of the present disclosure, and as shown in fig. 10, the blind detection control apparatus 900 may further include:

a determining module 903, configured to determine whether DCI is blind detected in a time window of a previous search space before a target PDCCH that needs blind detection is acquired;

a reading module 904, configured to obtain a value of a PDCCH retention flag bit in DCI when DCI is detected in a time window of a previous search space;

a determining module 905, configured to determine, according to the value of the PDCCH holding flag, whether the PDCCH used when the base station last transmits DCI is the same as the PDCCH used when the base station currently transmits DCI;

the blind detection module 902 is further configured to perform blind detection by using the PDCCH used when the DCI was transmitted last time when the PDCCH used when the DCI was transmitted last time is the same as the PDCCH used when the DCI was transmitted this time;

the obtaining module 901 is further configured to execute the step of obtaining the target PDCCH that needs to be blind-detected when the DCI is not blind-detected in the time window of the previous search space, or the PDCCH used when the DCI was last transmitted is different from the PDCCH used when the DCI was transmitted this time.

According to the technical scheme, for MPDCCH based on eMTC or NPDCCH based on NB-IoT, a target PDCCH for sending downlink control information DCI is determined on the base station side according to a pre-designated PDCCH set or a pre-configured PDCCH holding period, and the DCI is sent to user equipment by using the target PDCCH. Correspondingly, on the user equipment side, a target PDCCH needing blind detection is determined according to a pre-specified PDCCH set or a pre-configured PDCCH retention period, and the target PDCCH is utilized to perform the blind detection of the DCI. The number of the MPDCCHs or the NPDCCHs required to be subjected to blind detection by the user equipment can be reduced, so that the blind detection complexity of the user equipment can be reduced, and the blind detection power consumption is reduced

Fig. 11 is a block diagram illustrating a base station in accordance with an example embodiment. As shown in fig. 11, the base station 1100 may include: a processor 1101, a memory 1102, an input/output (I/O) interface 1103, and a communications component 1104.

The processor 1101 is configured to control the overall operation of the base station 1100, so as to complete all or part of the steps in the above-described blind detection control method. The memory 1102 is used to store various types of data to support operation at the base station 1100, such as instructions for any application or method operating on the base station 1100, as well as application-related data such as messaging, pictures, audio, video, and so forth. The Memory 1102 may be implemented by any type or combination of volatile and non-volatile Memory devices, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk. The I/O interface 1103 provides an interface between the processor 1101 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. A communication component 1104 is employed for wired or wireless communication between the base station 1100 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, or 4G, or a combination of one or more of them, and thus the corresponding Communication component 1104 may include: Wi-Fi module, bluetooth module, NFC module.

In an exemplary embodiment, the base station 1100 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described blind detection control method.

In another exemplary embodiment, a computer readable storage medium, such as a memory 1102, is also provided that includes program instructions executable by a processor 1101 of the base station 1100 to perform the blind detection control method described above.

Fig. 12 is a block diagram illustrating a user device in accordance with an example embodiment. As shown in fig. 12, the user equipment 12 may include: a processor 1201, a memory 1202, a multimedia component 1203, an input/output (I/O) interface 1204, and a communications component 1205.

The processor 1201 is configured to control the overall operation of the ue 1200, so as to complete all or part of the steps in the above-mentioned blind detection control method. The memory 1202 is used to store various types of data to support operation at the user device 1200, such as instructions for any application or method operating on the user device 1200 and application-related data, such as contact data, messaging, pictures, audio, video, and so forth. The Memory 1202 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk. The multimedia components 1203 may include screen and audio components. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may further be stored in the memory 1202 or transmitted via the communication component 1205. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 1204 provides an interface between the processor 1201 and other interface modules, such as a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. A communication component 1205 is used for wired or wireless communication between the user device 1200 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, or 4G, or a combination of one or more of them, so that the corresponding Communication component 1205 can include: Wi-Fi module, bluetooth module, NFC module.

In an exemplary embodiment, the user equipment 1200 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described blind detection control method.

In another exemplary embodiment, a computer readable storage medium, such as the memory 1202, is also provided that includes program instructions executable by the processor 1201 of the user device 1200 to perform the blind detection control method described above.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A blind detection control method is applied to a base station, and comprises the following steps:

determining a target PDCCH for sending DCI (downlink control information) according to a pre-configured PDCCH resource selection strategy, wherein the PDCCH resource selection strategy comprises a pre-designated PDCCH set or a pre-configured PDCCH retention period, the PDCCH comprises an MPDCCH (multi-channel physical control channel) based on enhanced machine type communication (eMTC) or an NPDCCH (network data channel) based on narrow-band Internet of things (NB-IoT), and the PDCCH retention period is a period for updating the MPDCCH or the NPDCCH;

transmitting the DCI to user equipment by using the target PDCCH;

the PDCCH resource selection strategy includes the PDCCH retention period, and the determining a target PDCCH for transmitting DCI according to a preconfigured PDCCH resource selection strategy includes:

2. The method of claim 1, wherein the PDCCH resource selection strategy comprises the PDCCH retention period, an update window is set in the PDCCH retention period, the starting time of the update window is the same as the starting time of the PDCCH retention period, and the duration of the update window is smaller than the PDCCH retention period;

3. The method according to claim 1 or 2, wherein the starting subframe of one PDCCH retention period is a subframe satisfying the following condition:

wherein,

a number of the super system frame is indicated,

a system frame number is indicated that indicates a system frame number,

which indicates the number of the time slot,

which represents the starting offset factor, is,Tindicating a PDCCH retention period.

4. The method of claim 1, wherein the PDCCH resource selection strategy comprises the pre-designated PDCCH set, and wherein determining the target PDCCH for transmitting the DCI according to the pre-configured PDCCH resource selection strategy comprises:

and determining the PDCCH in the pre-designated PDCCH set as the target PDCCH.

5. The method of claim 4, wherein the transmitting the DCI to a user equipment using the target PDCCH comprises:

6. The method of claim 1, wherein the transmitting the DCI to a user equipment using the target PDCCH comprises:

setting a PDCCH holding flag bit in the DCI;

7. A blind detection control method is applied to user equipment, and the method comprises the following steps:

acquiring a target Physical Downlink Control Channel (PDCCH) needing blind detection, wherein the target PDCCH is a PDCCH which is determined according to a pre-configured PDCCH resource selection strategy and is used for sending Downlink Control Information (DCI), the PDCCH resource selection strategy comprises a pre-designated PDCCH set or a pre-configured PDCCH retention period, the PDCCH comprises an MPDCCH based on enhanced machine type communication (eMTC) or an NPDCCH based on a narrow-band internet of things (NB-IoT), and the PDCCH retention period is a period for updating the MPDCCH or the NPDCCH;

performing blind detection by using the target PDCCH to acquire the DCI sent by the base station;

the PDCCH resource selection strategy comprises the PDCCH retention period, and the acquiring the target PDCCH needing blind detection comprises:

8. The method of claim 7, wherein the PDCCH resource selection strategy comprises the PDCCH retention period, wherein an update window is set in the PDCCH retention period, the starting time of the update window is the same as the starting time of the PDCCH retention period, and the duration of the update window is smaller than the PDCCH retention period; the acquiring of the target PDCCH needing blind detection comprises the following steps:

when the search space is in the updating window, taking all PDCCHs in the current search space as the target PDCCHs;

9. The method according to claim 7 or 8, wherein the starting subframe of one PDCCH retention period is a subframe satisfying the following condition:

wherein,

a number of the super system frame is indicated,

a system frame number is indicated that indicates a system frame number,

which indicates the number of the time slot,

10. The method of claim 7, wherein the PDCCH resource selection strategy comprises the pre-designated PDCCH set, and wherein the acquiring the target PDCCH requiring blind detection comprises:

and determining the PDCCH in the pre-designated PDCCH set as the target PDCCH.

11. The method of claim 10, wherein the performing blind detection using the target PDCCH to obtain the DCI transmitted by the base station comprises:

preferentially utilizing the target PDCCH to carry out blind detection;

12. The method of claim 7, wherein before the acquiring the target PDCCH requiring blind detection, the method further comprises:

13. A blind detection control device applied to a base station, the device comprising:

a determining module, configured to determine a target PDCCH for sending downlink control information DCI according to a preconfigured physical downlink control channel PDCCH resource selection policy, where the PDCCH resource selection policy includes a pre-specified PDCCH set or a preconfigured PDCCH retention period, the PDCCH includes an MPDCCH based on enhanced machine type communication eMTC or an NPDCCH based on narrowband NB-IoT, and the PDCCH retention period is a period for updating the MPDCCH or the NPDCCH;

a sending module, configured to send the DCI to a user equipment using the target PDCCH;

the PDCCH resource selection policy comprises the PDCCH retention period, and the determining module is configured to:

14. The apparatus of claim 13, wherein the PDCCH resource selection strategy comprises the PDCCH holding period, wherein an update window is set in the PDCCH holding period, a starting time of the update window is the same as a starting time of the PDCCH holding period, and a duration of the update window is smaller than the PDCCH holding period; the determining module is configured to:

15. The apparatus of claim 13 or 14, wherein a starting subframe of one PDCCH holding period is a subframe satisfying the following condition:

wherein,

a number of the super system frame is indicated,

a system frame number is indicated that indicates a system frame number,

which indicates the number of the time slot,

16. The apparatus of claim 13, wherein the PDCCH resource selection policy comprises the pre-designated PDCCH set, and wherein the determining module is configured to:

and determining the PDCCH in the pre-designated PDCCH set as the target PDCCH.

17. The apparatus of claim 16, wherein the sending module is configured to:

18. The apparatus of claim 13, wherein the sending module comprises:

a setting submodule, configured to set a PDCCH holding flag bit in the DCI;

19. A blind detection control device applied to User Equipment (UE), the device comprising:

an obtaining module, configured to obtain a target Physical Downlink Control Channel (PDCCH) that needs blind detection, where the target PDCCH is a PDCCH that is determined according to a preconfigured PDCCH resource selection policy and is used to send Downlink Control Information (DCI), the PDCCH resource selection policy includes a pre-specified PDCCH set or a preconfigured PDCCH retention period, the PDCCH includes an MPDCCH based on enhanced machine type communication (eMTC) or an NPDCCH based on a narrowband internet of things (NB-IoT), and the PDCCH retention period is a period for updating the MPDCCH or the NPDCCH;

a blind detection module, configured to perform blind detection using the target PDCCH to obtain the DCI sent by the base station;

the PDCCH resource selection policy comprises the PDCCH retention period, and the obtaining module is configured to:

20. The apparatus of claim 19, wherein the PDCCH resource selection policy comprises the PDCCH holding period, wherein an update window is set in the PDCCH holding period, a starting time of the update window is the same as a starting time of the PDCCH holding period, and a duration of the update window is smaller than the PDCCH holding period; the obtaining module is configured to:

21. The apparatus of claim 19 or 20, wherein a starting subframe of one PDCCH holding period is a subframe satisfying the following condition:

wherein,

a number of the super system frame is indicated,

a system frame number is indicated that indicates a system frame number,

which indicates the number of the time slot,

22. The apparatus of claim 19, wherein the PDCCH resource selection policy comprises the pre-designated PDCCH set, and wherein the obtaining module is configured to:

and determining the PDCCH in the pre-designated PDCCH set as the target PDCCH.

23. The apparatus of claim 22, wherein the blind detection module is configured to:

preferentially utilizing the target PDCCH to carry out blind detection;

24. The apparatus of claim 19, further comprising:

25. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.

26. A base station, comprising:

a memory having a computer program stored thereon; and

one or more processors configured to execute a computer program in the memory to perform the steps of the method of any one of claims 1-6.

27. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 7 to 12.

28. A user device, comprising:

a memory having a computer program stored thereon; and

one or more processors configured to execute a computer program in the memory to perform the steps of the method of any one of claims 7-12.