CN114845270B

CN114845270B - Method and apparatus in a node for wireless communication

Info

Publication number: CN114845270B
Application number: CN202210417606.XA
Authority: CN
Inventors: 蒋琦; 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2019-05-22
Filing date: 2019-05-22
Publication date: 2024-09-13
Anticipated expiration: 2039-05-22
Also published as: CN114845270A; CN111988760A; CN114866984A; CN111988760B

Abstract

A method and apparatus in a node for wireless communication is disclosed. The first node first performs a first measurement to determine first channel information; second receiving a first signal, the first signal including second channel information; subsequently transmitting the first signaling and the second signal; the first channel information and the second channel information are used together to determine a set of candidate indices, the first index being one of the set of candidate indices; the first signaling is physical layer signaling; the first signaling is used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; the second channel information is channel information for a sidelink; the application uses the first channel information and the second channel information together to determine the first index, and further reflects the channel occupation condition to the selection of the modulation coding mode, so as to optimize the transmission performance and efficiency of the sidelink.

Description

Method and apparatus in a node for wireless communication

The application is a divisional application of the following original application:

Filing date of the original application: 22 th 2019, 05 th month

Number of the original application: 201910430092.X

-The name of the invention of the original application: method and apparatus in a node for wireless communication

Technical Field

The present application relates to a transmission method and apparatus in a wireless communication system, and in particular, to a method and apparatus for scheduling on a sidelink in an internet of things or an internet of things system.

Background

For the rapidly evolving internet of vehicles (V2X) service, 3GPP has also begun to initiate standard formulation and research work under the NR framework. The 3GPP has completed the requirement formulation work for the 5g v2x service at present, and writes it into the standard TS 22.886. The 3GPP defines a 4-large application scenario group (Use Case Groups) for 5g v2x services, including: auto-queuing Driving (Vehicles Platnooning), support Extended sensing (Extended sensing), semi/full automatic Driving (ADVANCED DRIVING) and Remote Driving (Remote Driving). NR-based V2X technology studies have been initiated at 3gpp ran#80, and agree on the path loss for the transmitting and receiving ends of the V2X pair as a reference for the transmit power of V2X at RAN12019 for the first ad hoc conference.

In the V2X with Rel-15 being based on NR, CQI (Channel Quality Indicator, channel quality indication) on the secondary link is introduced into the physical layer report to increase the spectrum efficiency on the secondary link, and thus, at the transmitting end of the PSSCH (PHYSICAL SIDELINK SHARED CHANNEL, physical secondary link shared channel), how to determine MCS (Modulation and Coding Scheme, modulation coding scheme) through the CQI report will need to be redesigned.

Disclosure of Invention

In the V2X system of Rel-13/14, the terminal can determine the PSCCH (PHYSICAL SIDELINK Control Channel) and the time-frequency resource occupied by the PSSCH by Sensing the occupation condition of the (Sensing) sub-Channel (Subchannel). In the NR-based V2X, channel quality between a transmitting end and a receiving end may be embodied through reporting of CQI on a secondary link, thereby improving spectral efficiency of transmission on the secondary link. The CBR (Channel Busy Ratio ) result of channel perception is the subchannel occupancy perceived at the sender, while CQI is the channel quality of the sidelink perceived at the receiver; the application discloses a solution to realize simultaneous application of CBR and CQI to scheduling of sidelink. It should be noted that, in the case of no conflict, the embodiments of the first node and the second node of the present application and the features in the embodiments may be applied to the base station. Meanwhile, the embodiments of the present application and the features in the embodiments may be arbitrarily combined with each other without collision.

The application discloses a method used in a first node of wireless communication, which is characterized by comprising the following steps:

performing a first measurement to determine first channel information;

receiving a first signal, the first signal including second channel information;

transmitting a first signaling and a second signal;

Wherein the first channel information and the second channel information are used together to determine a candidate index set, the first signaling being used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; the first index is one candidate index in the candidate index set; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink.

As an embodiment, the above method has the following advantages: when the first channel information corresponds to the CBR obtained by measurement of the first node, and the second channel information corresponds to CQI feedback from a receiving end of a sidelink data channel received by the first node; the first node determines the proper first index, namely the modulation coding mode of the second signal, by comprehensively considering the first channel information and the second channel information, thereby improving the performance on the secondary link.

As an embodiment, the principle of the above method is: when CBR is large, the first node needs to select MCS more conservatively to avoid interference from potential other users, even if CQI feedback indicates a better channel on the sidelink; similarly, when CBR is small, the first node may use more aggressive MCS selection to increase sidelink spectral efficiency even though CQI feedback indicates that the channel on the sidelink is general.

According to an aspect of the present application, the method is characterized in that the sentence in which the first channel information and the second channel information are used together to determine the meaning of the candidate index set includes: the first index is not greater than the sum of the second index and the first offset; the first offset is related to the first channel information; the second index is related to the second channel information.

As an embodiment, the above method has the following advantages: establishing a connection between the first offset and the first channel information, and considering CBR into the selection of MCS through the first offset; when CBR is larger, the code rate corresponding to CQI recommended by a sender of the first signal is properly reduced through a first offset and is applied to the second signal, so that the transmission performance is ensured; when CBR is smaller, the code rate corresponding to the CQI recommended by the sender of the first signal is appropriately increased by the first offset and applied to the second signal, so as to increase the spectrum efficiency.

According to an aspect of the present application, the method is characterized in that the sentence in which the first channel information and the second channel information are used together to determine the meaning of the candidate index set includes: the first index is not greater than the sum of the second index and the second offset, and the first index is not less than the difference between the second index and the third offset; the second offset and the third offset are both related to the first channel information; the second index is related to the second channel information.

As an embodiment, the above method has the following advantages: establishing a connection between the second offset and the third offset and the first channel information, and taking CBR into consideration in the selection of MCS through the second offset and the third offset; and further, according to CQI feedback, the second offset and the third offset, a larger MCS selection space is given to the first node on the basis of combining CBR, so that the code rate is flexibly configured, and the transmission performance of the secondary link is improved.

According to one aspect of the present application, the method is characterized in that a first index set is related to the first channel information, and any candidate index in the candidate index set belongs to the first index set.

According to an aspect of the present application, the above method is characterized in that the second channel information is used to indicate a second index, the second index corresponding to a second spectral efficiency value, the first set of indices corresponding to a first spectral efficiency value interval, the second spectral efficiency value not belonging to the first spectral efficiency value interval; the first index set comprises K1 first type indexes; the candidate index set includes only the smallest first-class index in the first index set, or the candidate index set includes only the largest first-class index in the first index set.

As an embodiment, the above method has the following advantages: when the CQI reported by the sender of the first signal exceeds the MCS set based on CBR configured by the first node, the first node adopts the largest or smallest MCS in the configured MCS set to send, and the transmission performance is ensured under the condition of ensuring the dispatching autonomy.

According to an aspect of the present application, the receiver of the second signal includes a second node, and the first node assumes that an error probability of a transport block corresponding to the second signal received by the second node when the modulation coding mode corresponding to the first index is adopted is not greater than a first threshold; the first threshold is fixed or configured by higher layer signaling.

The application discloses a method used in a second node of wireless communication, which is characterized by comprising the following steps:

Transmitting a first signal, the first signal including second channel information;

receiving a first signaling and a second signal;

Wherein first channel information and the second channel information are used together to determine a set of candidate indices, a sender of the first signaling performing a first measurement to determine the first channel information; the first signaling is used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; the first index is one candidate index in the candidate index set; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink.

According to an aspect of the present application, the above method is characterized in that the error probability of the transport block corresponding to the second signal received by the second node when the modulation coding scheme corresponding to the first index is adopted is not greater than a first threshold value; the first threshold is fixed or configured by higher layer signaling.

The present application discloses a first node used for wireless communication, which is characterized by comprising:

a first receiver performing a first measurement to determine first channel information;

A second receiver that receives a first signal, the first signal including second channel information;

a first transmitter that transmits a first signaling and a second signal;

The present application discloses a second node used for wireless communication, which is characterized by comprising:

a second transmitter transmitting a first signal, the first signal including second channel information;

a third receiver that receives the first signaling and the second signal;

As an embodiment, the present application has the following advantages over the conventional scheme:

First channel information corresponds to CBR obtained by measurement of the first node, and second channel information corresponds to CQI feedback from a receiving end of a data channel of a secondary link received by the first node; the first node determines a proper first index after comprehensively considering the first channel information and the second channel information, namely a modulation coding mode of the second signal, so that the performance on a secondary link is improved;

When CBR is large, the first node needs to select MCS more conservatively to avoid interference by potential other users, even if CQI feedback indicates a better channel on the sidelink; likewise, when CBR is smaller, the first node may use more aggressive MCS selection to improve sidelink spectral efficiency even though CQI feedback indicates that the channel on the sidelink is general;

Establishing a connection between the first offset and the first channel information, taking the CBR into account the selection of the MCS by means of the first offset; when CBR is larger, the code rate corresponding to CQI recommended by a sender of the first signal is properly reduced through a first offset and is applied to the second signal, so that the transmission performance is ensured; when the CBR is smaller, the code rate corresponding to the CQI recommended by the sender of the first signal is properly increased through a first offset and is applied to a second signal, so that the spectrum efficiency is improved; or establishing a relation between the second offset and the third offset and the first channel information, and taking CBR into consideration in the selection of MCS through the second offset and the third offset; further, according to CQI feedback, the second offset and the third offset, a larger MCS selection space is given to the first node on the basis of combining CBR, so that the code rate is flexibly configured, and the transmission performance of the secondary link is improved;

When the CQI reported by the sender of the first signal exceeds the MCS set configured by the first node and based on the CBR, the first node adopts the largest or smallest MCS in the configured MCS set to send, and the transmission performance is ensured under the condition of ensuring the dispatching autonomy.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings in which:

FIG. 1 illustrates a process flow diagram of a first node according to one embodiment of the application;

FIG. 2 shows a schematic diagram of a network architecture according to one embodiment of the application;

Fig. 3 shows a schematic diagram of an embodiment of a radio protocol architecture of a user plane and a control plane according to an embodiment of the application;

FIG. 4 shows a schematic diagram of a first communication device and a second communication device according to one embodiment of the application;

FIG. 5 shows a flow chart of a first signal according to one embodiment of the application;

FIG. 6 shows a schematic diagram of a first measurement according to an embodiment of the application;

fig. 7 shows a schematic diagram of first channel information according to an embodiment of the application;

FIG. 8 illustrates a schematic diagram of a first offset and a first index according to one embodiment of the application;

FIG. 9 shows a schematic diagram of a second offset and a third offset according to one embodiment of the application;

FIG. 10 shows a schematic diagram of a second offset, a third offset, and a first index according to one embodiment of the application;

FIG. 11 illustrates a first index set and candidate index set schematic diagram in accordance with one embodiment of the application;

FIG. 12 illustrates a first index set and candidate index set schematics according to another embodiment of the application;

FIG. 13 illustrates a block diagram of a structure used in a first node in accordance with one embodiment of the present application;

Fig. 14 shows a block diagram of a structure for use in a second node according to an embodiment of the application.

Detailed Description

The technical scheme of the present application will be further described in detail with reference to the accompanying drawings, and it should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be arbitrarily combined with each other.

Example 1

Embodiment 1 illustrates a process flow diagram of a first node, as shown in fig. 1. In 100 shown in fig. 1, each block represents a step. In embodiment 1, a first node in the present application performs a first measurement in step 101 to determine first channel information; receiving a first signal in step 102, the first signal comprising second channel information; the first signaling and the second signal are sent in step 103.

In embodiment 1, the first channel information and the second channel information are used together to determine a candidate index set, and the first signaling is used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; the first index is one candidate index in the candidate index set; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink.

As an embodiment, the first channel information is CBR.

As one embodiment, the first channel information is a positive integer not less than 0 and not more than 100.

As an embodiment, the first channel information indicates a number of time slots in which RSSI (RECEIVED SIGNAL STRENGTH Indicator of received channel strength) on the first set of frequency domain resources detected in the given time window is greater than a given threshold.

As a sub-embodiment of this embodiment, the given time window is continuous.

As a sub-embodiment of this embodiment, the given time window comprises 100 time slots.

As a sub-embodiment of this embodiment, the given threshold is fixed or the given threshold is configured by higher layer signaling.

As a sub-embodiment of this embodiment, the unit of the given threshold is dBm (millidecibel) or the unit of the given threshold is watts.

As an embodiment, the first channel information is used to represent a channel occupancy of the first sub-channel.

As an embodiment, the first channel information is used to represent a duty cycle of the first sub-channel.

As one embodiment, the first channel information is used to represent an average SINR (Signal to Interference plus Noise Ratio ) over the first sub-channel.

As an embodiment, the candidate index set includes a positive integer number of candidate indexes, and the first index is one candidate index of the positive integer number of candidate indexes.

As one embodiment, the candidate Index set includes a positive integer number of candidate indices, any one of which is one MCS Index.

As an embodiment, the second channel information is a CQI.

As an embodiment, the second channel information is a PMI (Precoding Matrix Indicator ).

As an embodiment, the second channel information is feedback for a sidelink.

As an embodiment, the second channel Information is CSI (CHANNEL STATE Information) for a sidelink.

As an embodiment, the second channel information includes HARQ-ACK (Hybrid Automatic Repeat request Acknowledgement ) for sidelink data transmission.

As one embodiment, the second channel information includes a number of NACK (Non-Acknowledgement) counted by a sender of the second channel information in a target time window.

As an embodiment, the sidelink in the present application is Sidelink.

As one example, the sidelink in the present application corresponds to a PC-5 (Proximity Communication-5 ) interface.

As an embodiment, the sidelink in the present application is a wireless link between terminals.

As an embodiment, the second channel information is RSRP (REFERENCE SIGNAL RECEIVING Power, reference signal received Power) from the first node to the second node in the present application.

As an embodiment, the second channel information is RSRQ (REFERENCE SIGNAL RECEIVING Quality, reference signal reception Quality) of the first node to the second node in the present application.

As one embodiment, the second channel information is SINR detected by a sender of the second channel information.

As an embodiment, the first index is used to indicate the MCS of the second signal.

As an embodiment, the candidate index set includes Q1 candidate indexes, and the first index is one candidate index of the Q1 candidate indexes.

As a sub-embodiment of this embodiment, the Q1 candidate indexes correspond to Q1 MCS indexes, respectively.

As a sub-embodiment of this embodiment, the Q1 candidate indexes correspond to Q1 different spectral efficiencies, respectively.

As an embodiment, the first signal is transmitted over a sidelink.

As an embodiment, the physical layer Channel occupied by the first signal includes PSFCH (PHYSICAL SIDELINK Feedback Channel ).

As an embodiment, the physical layer channel occupied by the first signal includes a PSSCH.

As an embodiment, the first measurement is performed on a first set of frequency domain resources, the frequency domain resources occupied by the second signal not exceeding the first set of frequency domain resources.

As a sub-embodiment of this embodiment, the first set of frequency domain resources is a BWP (Bandwidth Part).

As a sub-embodiment of this embodiment, the first set of frequency domain resources is one CC (Component Carrier ).

As a sub-embodiment of this embodiment, the first set of frequency domain resources is one Subchannel (sub-channel).

As a sub-embodiment of this embodiment, the first set of frequency domain resources comprises frequency domain resources occupied by a positive integer number of consecutive PRBs (Physical Resource Block, physical resource blocks).

As an embodiment, the first measurement comprises X channel perceptions, the X channel perceptions being performed in X time-domain units, respectively, the X channel perceptions being used to determine X first-class measurement values, the X first-class measurement values being used to determine the first channel information, the X being a positive integer.

As a sub-embodiment of this embodiment, the X time-domain units are X time slots.

As a sub-embodiment of this embodiment, said X is equal to 100, said X time-domain units being 100 consecutive time slots before the time slot occupied by said second signal.

As a sub-embodiment of this embodiment, the first channel information includes R, which is an integer not less than 0 and not more than 100, used to indicate a measurement value greater than a given threshold value among the X first-type measurement values.

As an subsidiary embodiment of this sub-embodiment, any of said X first type of measurement values is a detected S-RSSI in the corresponding time domain unit (SIDELINK RSSI, sidelink received channel strength indication).

As an subsidiary embodiment of this sub-embodiment, the unit of any one of the X first type of measurement values is dBm.

As an subsidiary embodiment of this sub-embodiment, the unit of any one of said X first type of measurement values is either a watt or a milliwatt.

As an subsidiary embodiment of this sub-embodiment, said given threshold value is in dBm.

As an subsidiary embodiment of this sub-embodiment, said given threshold value is in units of watts or milliwatts.

As an embodiment, the first signaling is a SCI (Sidelink Control Information ).

As an embodiment, the first signaling is used to indicate time domain resources occupied by the second signal.

As an embodiment, the first signaling is used to indicate frequency domain resources occupied by the second signal.

As an embodiment, the physical layer channel occupied by the first signaling comprises a PSCCH.

As an embodiment, the physical layer channel occupied by the second signal includes a PSSCH.

As one embodiment, the first signal comprises a wireless signal.

As an embodiment, the first signal comprises a baseband signal.

As an embodiment, the first signal is transmitted over an air interface (AIR INTERFACE).

As an embodiment, the second signal comprises a wireless signal.

As an embodiment, the second signal comprises a baseband signal.

As an embodiment, the second signal is transmitted over an air interface.

Example 2

Embodiment 2 illustrates a schematic diagram of a network architecture, as shown in fig. 2.

Fig. 2 illustrates a diagram of a network architecture 200 of a 5g nr, LTE (Long-Term Evolution) and LTE-a (Long-Term Evolution Advanced, enhanced Long-Term Evolution) system. The 5G NR or LTE network architecture 200 may be referred to as EPS (Evolved PACKET SYSTEM ) 200, or some other suitable terminology. EPS200 may include one or more UEs (User Equipment) 201, and includes a UE241 in sidelink communication with UE201, NG-RAN (next generation radio access Network) 202, epc (Evolved Packet Core )/5G-CN (5G Core Network) 210, hss (Home Subscriber Server ) 220, and internet service 230. The EPS may interconnect with other access networks, but these entities/interfaces are not shown for simplicity. As shown, EPS provides packet-switched services, however, those skilled in the art will readily appreciate that the various concepts presented throughout this disclosure may be extended to networks providing circuit-switched services or other cellular networks. The NG-RAN includes NR node bs (gnbs) 203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gNB203 may be connected to other gnbs 204 via an Xn interface (e.g., backhaul). The gNB203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (transmit receive node), or some other suitable terminology. The gNB203 provides the UE201 with an access point to the EPC/5G-CN 210. Examples of UE201 include a cellular telephone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, a non-terrestrial base station communication, a satellite mobile communication, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, an drone, an aircraft, a narrowband internet of things device, a machine-type communication device, a land-based vehicle, an automobile, a wearable device, or any other similar functional device. Those of skill in the art may also refer to the UE201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. The gNB203 is connected to the EPC/5G-CN 210 through an S1/NG interface. EPC/5G-CN 210 includes MME (Mobility MANAGEMENT ENTITY )/AMF (Authentication management domain)/UPF (User Plane Function ) 211, other MME/AMF/UPF214, S-GW (SERVICE GATEWAY, serving Gateway) 212 and P-GW (PACKET DATE Network Gateway, Packet data network gateway) 213. The MME/AMF/UPF211 is a control node that handles signaling between the UE201 and the EPC/5G-CN 210. In general, the MME/AMF/UPF211 provides bearer and connection management. All user IP (Internet Protocal, internet protocol) packets are transported through the S-GW212, which S-GW212 itself is connected to P-GW213. The P-GW213 provides UE IP address assignment as well as other functions. The P-GW213 is connected to the internet service 230. Internet services 230 include operator-corresponding internet protocol services, which may include, in particular, the internet, intranets, IMS (IP Multimedia Subsystem ) and packet-switched streaming services.

As an embodiment, the UE201 corresponds to the first node in the present application.

As an embodiment, the UE241 corresponds to the second node in the present application.

As an embodiment, the air interface between the UE201 and the gNB203 is a Uu interface.

As one embodiment, the wireless link between the UE201 and the gNB203 is a cellular link.

As an embodiment, the air interface between the UE201 and the UE241 is a PC-5 interface.

As an embodiment, the radio link between the UE201 and the UE241 is a sidelink.

As an embodiment, the first node in the present application is a terminal within the coverage of the gNB 203.

As an embodiment, the second node in the present application is a terminal outside the coverage of the gNB 203.

As an embodiment, the first node and the second node belong to a V2X Pair (Pair).

As one embodiment, unicast-based V2X communication is performed between the first node and the second node.

As an embodiment, the first node and the second node perform multicast-based V2X communication.

As an embodiment, the first node is an automobile.

As an embodiment, the second node is an automobile.

As an embodiment, the first node is a vehicle.

As an embodiment, the second node is a vehicle.

As an embodiment, the first node is an RSU (Road Side Unit).

As an embodiment, the second node is an RSU.

Example 3

Embodiment 3 shows a schematic diagram of an embodiment of a radio protocol architecture of a user plane and a control plane according to the application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for the user plane 350 and the control plane 300, fig. 3 shows the radio protocol architecture for the control plane 300 for a first communication node device (UE, RSU in gNB or V2X) and a second communication node device (gNB, RSU in UE or V2X), or between two UEs, in three layers: layer 1, layer 2 and layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY301. Layer 2 (L2 layer) 305 is above PHY301 and is responsible for the link between the first communication node device and the second communication node device and the two UEs through PHY301. The L2 layer 305 includes a MAC (Medium Access Control ) sublayer 302, an RLC (Radio Link Control, radio link layer control protocol) sublayer 303, and a PDCP (PACKET DATA Convergence Protocol ) sublayer 304, which terminate at the second communication node device. the PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by ciphering the data packets and handover support for the first communication node device between second communication node devices. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out of order reception due to HARQ. The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell among the first communication node devices. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control ) sublayer 306 in layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the second communication node device and the first communication node device. The radio protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer), the radio protocol architecture for the first communication node device and the second communication node device in the user plane 350 is substantially the same for the physical layer 351, PDCP sublayer 354 in the L2 layer 355, RLC sublayer 353 in the L2 layer 355 and MAC sublayer 352 in the L2 layer 355 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. Also included in the L2 layer 355 in the user plane 350 is an SDAP (SERVICE DATA Adaptation Protocol ) sublayer 356, the SDAP sublayer 356 being responsible for mapping between QoS flows and data radio bearers (DRBs, data Radio Bearer) to support diversity of traffic. Although not shown, the first communication node apparatus may have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) that terminates at the P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., remote UE, server, etc.).

As an embodiment, the radio protocol architecture in fig. 3 is applicable to the first node in the present application.

As an embodiment, the radio protocol architecture in fig. 3 is applicable to the second node in the present application.

As an embodiment, the first channel information is generated at the PHY301 or the PHY 351.

As an embodiment, the first channel information is generated at the MAC352 or the MAC 302.

As an embodiment, the first channel information is generated at the RRC 306.

As an embodiment, the first signal is generated in the PHY301 or the PHY351.

As an embodiment, the first signal is generated at the MAC352 or the MAC302.

As an embodiment, the first signal is generated in the RRC306.

As an embodiment, the second channel information is generated at the PHY301 or the PHY 351.

For one embodiment, the second channel information is generated at the MAC352 or the MAC 302.

As an embodiment, the first signaling is generated in the PHY301 or the PHY351.

As an embodiment, the second signal is generated in the PHY301 or the PHY351.

As an embodiment, the second signal is generated at the MAC352 or the MAC302.

Example 4

Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the application, as shown in fig. 4. Fig. 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

The first communication device 450 includes a controller/processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter/receiver 454, and an antenna 452.

The second communication device 410 includes a controller/processor 475, a memory 476, a receive processor 470, a transmit processor 416, a multi-antenna receive processor 472, a multi-antenna transmit processor 471, a transmitter/receiver 418, and an antenna 420.

In the transmission from the second communication device 410 to the first communication device 450, upper layer data packets from the core network are provided to a controller/processor 475 at the second communication device 410. The controller/processor 475 implements the functionality of the L2 layer. In the transmission from the second communication device 410 to the first communication device 450, a controller/processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communication device 450 based on various priority metrics. The controller/processor 475 is also responsible for retransmission of lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., physical layer). Transmit processor 416 performs coding and interleaving to facilitate Forward Error Correction (FEC) at the second communication device 410, as well as mapping of signal clusters based on various modulation schemes, e.g., binary Phase Shift Keying (BPSK), quadrature Phase Shift Keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM). The multi-antenna transmit processor 471 digitally space-precodes the coded and modulated symbols, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, to generate one or more spatial streams. A transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes with reference signals (e.g., pilots) in the time and/or frequency domain, and then uses an Inverse Fast Fourier Transform (IFFT) to generate a physical channel carrying the time domain multicarrier symbol stream. The multi-antenna transmit processor 471 then performs transmit analog precoding/beamforming operations on the time domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multiple antenna transmit processor 471 to a radio frequency stream and then provides it to a different antenna 420.

In a transmission from the second communication device 410 to the first communication device 450, each receiver 454 receives a signal at the first communication device 450 through its respective antenna 452. Each receiver 454 recovers information modulated onto a radio frequency carrier and converts the radio frequency stream into a baseband multicarrier symbol stream that is provided to a receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various signal processing functions for the L1 layer. A multi-antenna receive processor 458 performs receive analog precoding/beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. The receive processor 456 converts the baseband multicarrier symbol stream after receiving the analog precoding/beamforming operation from the time domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receive processor 456, wherein the reference signal is to be used for channel estimation, and the data signal is subjected to multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial stream destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered in a receive processor 456 and soft decisions are generated. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals that were transmitted by the second communication device 410 on the physical channel. The upper layer data and control signals are then provided to the controller/processor 459. The controller/processor 459 implements the functions of the L2 layer. The controller/processor 459 may be associated with a memory 460 that stores program codes and data. Memory 460 may be referred to as a computer-readable medium. In the transmission from the second communication device 410 to the second communication device 450, the controller/processor 459 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover upper layer data packets from the core network. The upper layer packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing.

In the transmission from the first communication device 450 to the second communication device 410, a data source 467 is used at the first communication device 450 to provide upper layer data packets to a controller/processor 459. Data source 467 represents all protocol layers above the L2 layer. Similar to the transmit functions at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller/processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocations, implementing L2 layer functions for the user and control planes. The controller/processor 459 is also responsible for retransmission of lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping, channel coding, and digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming, with the multi-antenna transmit processor 457 performing digital multi-antenna spatial precoding, after which the transmit processor 468 modulates the resulting spatial stream into a multi-carrier/single-carrier symbol stream, which is analog precoded/beamformed in the multi-antenna transmit processor 457 before being provided to the different antennas 452 via the transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream and provides it to an antenna 452.

In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the receiving function at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals to baseband signals, and provides the baseband signals to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 collectively implement the functions of the L1 layer. The controller/processor 475 implements L2 layer functions. The controller/processor 475 may be associated with a memory 476 that stores program codes and data. Memory 476 may be referred to as a computer-readable medium. In the transmission from the first communication device 450 to the second communication device 410, a controller/processor 475 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover upper layer data packets from the UE 450. Upper layer packets from the controller/processor 475 may be provided to the core network.

As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus of the first communication device 450 to at least: performing a first measurement to determine first channel information; receiving a first signal, the first signal including second channel information; and transmitting the first signaling and the second signal; the first channel information and the second channel information are used together to determine a candidate index set; the first signaling is used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; the first index is one candidate index in the candidate index set; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink.

As an embodiment, the first communication device 450 includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: performing a first measurement to determine first channel information; receiving a first signal, the first signal including second channel information; and transmitting the first signaling and the second signal; the first channel information and the second channel information are used together to determine a candidate index set; the first signaling is used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; the first index is one candidate index in the candidate index set; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink.

As an embodiment, the second communication device 410 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured for use with the at least one processor. The second communication device 410 means at least: transmitting a first signal, the first signal including second channel information; receiving a first signaling and a second signal; the first channel information and the second channel information are used together to determine a candidate index set; the first signaling is used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; a sender of the first signaling performs a first measurement to determine the first channel information, the first index being one candidate index of the set of candidate indices; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink.

As an embodiment, the second communication device 410 apparatus includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: transmitting a first signal, the first signal including second channel information; receiving a first signaling and a second signal; the first channel information and the second channel information are used together to determine a candidate index set; the first signaling is used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; a sender of the first signaling performs a first measurement to determine the first channel information, the first index being one candidate index of the set of candidate indices; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink.

As an embodiment, the first communication device 450 corresponds to a first node in the present application.

As an embodiment, the second communication device 410 corresponds to a second node in the present application.

As an embodiment, the first communication device 450 is a UE.

As an embodiment, the second communication device 410 is a UE.

As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, and the controller/processor 459 is configured to perform a first measurement to determine first channel information.

As one embodiment, the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, at least one of the controller/processor 459 is configured to receive a first signal comprising second channel information; the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, at least one of the controller/processor 475 are used to transmit a first signal comprising second channel information.

As one implementation, the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, at least one of the controller/processor 459 is used to transmit first signaling and second signals; the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, at least one of the controller/processor 475 is configured to receive the first signaling and the second signal.

Example 5

Example 5 illustrates a flow chart of a first signal, as shown in fig. 5. In fig. 5, the first node U1 and the second node U2 communicate with each other via a sidelink.

For the first node U1, performing a first measurement in step S10 to determine first channel information; receiving a first signal in step S11, the first signal including second channel information; the first signaling and the second signal are transmitted in step S12.

For the second node U2, transmitting a first signal in step S20, the first signal comprising second channel information; the first signaling and the second signal are received in step S21.

In embodiment 5, the first channel information and the second channel information are used together to determine a candidate index set, and the first signaling is used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; the first index is one candidate index in the candidate index set; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink.

As an embodiment, the meaning that the first channel information and the second channel information of the sentence are used together to determine the candidate index set includes: the first index is not greater than the sum of the second index and the first offset; the first offset is related to the first channel information; the second index is related to the second channel information.

As a sub-embodiment of this embodiment, the candidate index set includes all candidate indexes that are not greater than a sum of the second index and the first offset.

As a sub-embodiment of this embodiment, the second index is a CQI.

As a sub-embodiment of this embodiment, the second index corresponds to a spectral efficiency value.

As a sub-embodiment of this embodiment, the meaning of the first offset of the above sentence regarding the first channel information includes: the value range of the first channel information does not exceed L1 intervals, the L1 intervals respectively correspond to L1 offset, the value of the first channel information belongs to a given interval in the L1 intervals, and the first offset is equal to the offset corresponding to the given interval in the L1 offsets.

As an subsidiary embodiment of this sub-embodiment, said L1 offsets are L1 integers, respectively.

As an auxiliary embodiment of the sub-embodiment, the L1 intervals respectively correspond to L1 value ranges, and an upper limit and a lower limit of any one of the L1 value ranges are non-negative integers.

As an auxiliary embodiment of this sub-embodiment, the L1 intervals correspond to L1 SINR ranges, respectively.

As a sub-embodiment of this embodiment, the meaning of the first offset of the above sentence regarding the first channel information includes: the first channel information is used to determine the first offset.

As a sub-embodiment of this embodiment, the meaning of the first offset of the above sentence regarding the first channel information includes: the first channel information is used to generate the first offset.

As a sub-embodiment of this embodiment, the first offset is a positive integer.

As a sub-embodiment of this embodiment, the first offset is a negative integer.

As a sub-embodiment of this embodiment, the first offset is equal to 0.

As a sub-embodiment of this embodiment, the meaning of the second index of the sentence related to the second channel information includes: the second channel information is used to indicate the second index.

As a sub-embodiment of this embodiment, the meaning of the second index of the sentence related to the second channel information includes: the second channel information includes the second index.

As a sub-embodiment of this embodiment, the meaning of the second index of the sentence related to the second channel information includes: the second channel information includes a target CQI, the second index is a second MCS index, and a spectral efficiency value corresponding to the second MCS index is not greater than a spectral efficiency value corresponding to the target CQI.

As an auxiliary embodiment of this sub-embodiment, the spectrum efficiency value corresponding to the second MCS index is the largest spectrum efficiency value among all spectrum efficiency values not greater than the spectrum efficiency value corresponding to the target CQI.

As a sub-embodiment of this embodiment, the meaning of the second index of the sentence related to the second channel information includes: the second channel information includes a target RSRP, the target RSRP value corresponds to the second index, and the second index is an MCS index.

As a sub-embodiment of this embodiment, the meaning of the second index of the sentence related to the second channel information includes: the second channel information includes a target RSRQ, the target RSRQ corresponding to the second index, and the second index being one MCS index.

As an embodiment, the meaning that the first channel information and the second channel information of the sentence are used together to determine the candidate index set includes: the first index is not greater than the sum of the second index and the second offset, and the first index is not less than the difference between the second index and the third offset; the second offset and the third offset are both related to the first channel information; the second index is related to the second channel information.

As a sub-embodiment of this embodiment, the candidate index set includes all candidate indexes that are not greater than a sum of the second index and the second offset, and not less than a difference between the second index and the third offset.

As a sub-embodiment of this embodiment, the meaning of the sentence in which the second offset and the third offset are both related to the first channel information includes: the value range of the first channel information does not exceed L1 intervals, the L1 intervals respectively correspond to L1 offset pairs, the value of the first channel information belongs to a given interval in the L1 intervals, and the second offset and the third offset are respectively equal to two offsets in an offset pair corresponding to the given interval in the L1 offset pairs.

As an subsidiary embodiment of this sub-embodiment, said L1 offset pairs are L1 integer pairs, respectively, any one of said L1 integer pairs comprising two integers.

As a subsidiary embodiment of this sub-embodiment, said L1 offset pairs are L1 non-negative integer pairs, respectively, any non-negative integer pair of said L1 integer pairs comprising two non-negative integers.

As a sub-embodiment of this embodiment, the meaning of the sentence in which the second offset and the third offset are both related to the first channel information includes: the first channel information is used to determine the second offset and the third offset.

As a sub-embodiment of this embodiment, the meaning of the sentence in which the second offset and the third offset are both related to the first channel information includes: the first channel information is used to generate the second offset and the third offset.

As a sub-embodiment of this embodiment, the second offset is a non-negative integer.

As a sub-embodiment of this embodiment, the third offset is a non-negative integer.

As an embodiment, a first set of indices is related to the first channel information, any candidate index of the candidate index sets belonging to the first set of indices.

As a sub-embodiment of this embodiment, the first Index set includes K1 first type indexes, where the K1 first type indexes respectively correspond to K1 MCS indexes.

As a sub-embodiment of this embodiment, the meaning of the first index set of the sentence related to the first channel information includes: the value range of the first channel information does not exceed L2 intervals, the L2 intervals respectively correspond to L2 first type index sets, the value of the first channel information belongs to a given interval in the L2 intervals, and the first index set is a first type index set corresponding to the given interval in the L2 first type index sets.

As an auxiliary embodiment of this sub-embodiment, the L2 intervals and the L2 index sets of the first class are configured by RRC signaling.

As an embodiment, the second channel information is used to indicate a second index, the second index corresponding to a second spectral efficiency value, the first set of indices corresponding to a first spectral efficiency value interval, the second spectral efficiency value not belonging to the first spectral efficiency value interval; the first index set comprises K1 first type indexes; the candidate index set includes only the smallest first-class index in the first index set, or the candidate index set includes only the largest first-class index in the first index set.

As a sub-embodiment of this embodiment, the meaning of the first index set corresponding to the first spectral efficiency value interval in the sentence includes: the largest first class index set of the K1 first class index sets corresponds to a first given spectrum efficiency value, the smallest first class index set of the K1 first class index sets corresponds to a second given spectrum efficiency value, and the first spectrum efficiency value interval corresponds to a spectrum efficiency value interval not greater than the first given spectrum efficiency value and not less than the second given spectrum efficiency value.

As a sub-embodiment of this embodiment, the meaning that the second spectral efficiency value does not belong to the first spectral efficiency value interval includes: the second spectral efficiency value is greater than the first given spectral efficiency value.

As a sub-embodiment of this embodiment, the meaning that the second spectral efficiency value does not belong to the first spectral efficiency value interval includes: the second spectral efficiency value is less than the second given spectral efficiency value.

As an embodiment, the receiver of the second signal includes a second node, and the first node assumes that an error probability of a transport block corresponding to the second signal received by the second node when the modulation coding mode corresponding to the first index is adopted is not greater than a first threshold; the first threshold is fixed or configured by higher layer signaling.

As a sub-embodiment of this embodiment, the first threshold value is equal to 0.1.

As a sub-embodiment of this embodiment, the first threshold value is equal to 0.00001.

Example 6

Example 6 illustrates a schematic of the first measurement, as shown in fig. 6. In fig. 6, the first measurement includes X channel perceptions, the X channel perceptions being respectively performed in X time-domain units, the X channel perceptions being used to determine X first-class measurements, the X first-class measurements being used to determine the first channel information, the X being a positive integer; and the first measurements are all measurements for the first subchannel in the present application.

As an embodiment, the X time-domain units are X consecutive time slots (slots), respectively.

As an embodiment, the X time-domain units are X consecutive subframes (subframes), respectively.

As an embodiment, the X time-domain units are X consecutive minislots (Mini-slots), respectively.

As an embodiment, the second signal is transmitted by the first node in the present application at an nth time domain unit, and the X time domain units are the (n-100) th to (n-1) th time domain units.

As an embodiment, said X is equal to 100.

As an embodiment, the first sub-channel occupies, in the frequency domain, frequency domain resources corresponding to a positive integer number of consecutive PRBs.

As an embodiment, the frequency domain resource occupied by the second signal in the present application belongs to the first sub-channel.

Example 7

Embodiment 7 illustrates a schematic diagram of first channel information, as shown in fig. 7. For the value of the first channel information, there are L1 integer sections, which are integer section #1 to integer section #l1, respectively; integer interval #i is an i-th integer interval of L1 integer intervals; the upper limit of the integer section #i is R (i), and the lower limit of the integer section #i is R (i-1); r (i) and R (i-1) are both positive integers; the L1 integer sections correspond to L1 offsets, that is, offset #1 to offset #l1 shown in the figure, respectively; the value of the first channel information belongs to the integer interval #i, and the first offset is equal to an offset corresponding to the integer interval #i of the L1 offsets.

As an embodiment, any one of the L1 offsets is an integer.

As one embodiment, the value range of the first channel information is not less than 0 and not more than 100.

Example 8

Embodiment 8 illustrates a schematic diagram of a first offset and a first index, as shown in fig. 8. In fig. 8, MCSs in the table are all MCSs that the first node can employ without regard to the first offset and the first index; the part in the dashed box is the candidate index set in the present application determined by the first offset and the second channel information; the spectrum efficiency value filled by oblique lines in the figure corresponds to the spectrum efficiency value corresponding to the second index in the application; and the frequency spectrum efficiency value corresponding to the second index is not more than the frequency spectrum efficiency value corresponding to the CQI included in the second channel information.

As an embodiment, the spectrum efficiency value corresponding to the second index is equal to the spectrum efficiency value corresponding to the CQI included in the second channel information.

As an embodiment, the spectral efficiency value corresponding to the second index is smaller than the largest one of the spectral efficiency values corresponding to the CQI included in the second channel information.

As an embodiment, the first node selects one candidate index from the candidate index set as the first index by itself.

As one embodiment, the first index is the MCS of the candidate index set that corresponds to the highest spectral efficiency.

Example 9

Embodiment 9 illustrates a schematic diagram of the second offset and the third offset, as shown in fig. 9. For the value of the first channel information, there are L1 integer sections, which are integer section #1 to integer section #l1, respectively; integer interval #i is an i-th integer interval of L1 integer intervals; the upper limit of the integer section #i is R (i), and the lower limit of the integer section #i is R (i-1); r (i) and R (i-1) are both positive integers; the L1 integer intervals respectively correspond to L1 offset pairs, namely offset pairs #1 to #l1 shown in the figure; any one of the offset pairs #1 to #l1 includes two offsets; the value of the first channel information belongs to the integer interval #i, and the second offset and the third offset are respectively equal to two offsets included in an offset pair corresponding to the integer interval #i in the L1 offset pairs; the spectrum efficiency value filled by oblique lines in the figure corresponds to the spectrum efficiency value corresponding to the second index in the application; and the frequency spectrum efficiency value corresponding to the second index is not more than the frequency spectrum efficiency value corresponding to the CQI included in the second channel information.

As an embodiment, any one of the L1 offset pairs includes an offset that is an integer.

Example 10

Embodiment 10 illustrates a schematic diagram of a second offset, a third offset, and a first index, as shown in fig. 10. In fig. 10, MCSs in the table are all MCSs that the first node can employ without regard to the first offset and the first index; the part in the dashed box is the candidate index set in the present application determined by the second offset, the third offset and the second channel information; the spectrum efficiency value filled by oblique lines in the figure corresponds to the spectrum efficiency value corresponding to the second index in the application; and the frequency spectrum efficiency value corresponding to the second index is not more than the frequency spectrum efficiency value corresponding to the CQI included in the second channel information.

As one embodiment, the first index is the MCS of the candidate index set that corresponds to the lowest spectral efficiency.

Example 11

Embodiment 11 illustrates a first index set and candidate index set schematic diagram of one embodiment, as shown in fig. 11. In FIG. 11, all MCS indices in the table in the figure make up the first Index set; the spectrum efficiency value filled by oblique lines in the figure corresponds to the spectrum efficiency value corresponding to the CQI included in the second channel information in the application; the frequency spectrum efficiency value corresponding to the CQI included in the second channel information is larger than the frequency spectrum efficiency value corresponding to any MCS in the first index set.

As an embodiment, the candidate index set includes only one candidate index, and the candidate index is the MCS with the largest corresponding spectral efficiency value in the first index set.

As an embodiment, the candidate index set includes only one candidate index, and the candidate index is an MCS corresponding to a spectral efficiency corresponding to a CQI included in the second channel information.

Example 12

Embodiment 12 illustrates a schematic diagram of a first index set and candidate index set of another embodiment, as shown in fig. 12. In FIG. 12, all MCS indices in the table in the figure make up the first Index set; the spectrum efficiency value filled by oblique lines in the figure corresponds to the spectrum efficiency value corresponding to the CQI included in the second channel information in the application; the frequency spectrum efficiency value corresponding to the CQI included in the second channel information is smaller than the frequency spectrum efficiency value corresponding to any MCS in the first index set.

As an embodiment, the candidate index set includes only one candidate index, and the candidate index is an MCS corresponding to a spectral efficiency value corresponding to a CQI included in the second channel information.

As an embodiment, the candidate index set includes only one candidate index, and the candidate index is the MCS with the smallest corresponding spectral efficiency value in the first index set, as indicated in the figure.

As one embodiment, the candidate index set includes all MCSs from the MCS corresponding to the spectral efficiency value corresponding to the CQI included in the second channel information to the MCS corresponding to the lowest spectral efficiency value in the first index set, as indicated in the figure, which is the first candidate index set.

Example 13

Embodiment 13 illustrates a block diagram of the structure in a first node, as shown in fig. 13. In fig. 13, a first node 1300 includes a first receiver 1301, a second receiver 1302, and a first transmitter 1303.

A first receiver 1301 that performs a first measurement to determine first channel information;

a second receiver 1302 that receives a first signal comprising second channel information;

a first transmitter 1303 that transmits a first signal and a second signal;

in embodiment 13, the first channel information and the second channel information are used together to determine a candidate index set, the first signaling being used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; the first index is one candidate index in the candidate index set; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink.

As an embodiment, the first receiver 1301 includes at least the first 4 of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, and the controller/processor 459 in embodiment 4.

As an embodiment, the second receiver 1302 includes at least the first 4 of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, and the controller/processor 459 of embodiment 4.

As one embodiment, the first transmitter 1303 includes at least the first 4 of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, and the controller/processor 459 in embodiment 4.

Example 14

Embodiment 14 illustrates a block diagram of the structure in a second node, as shown in fig. 14. In fig. 14, a second node 1400 includes a second transmitter 1401 and a third receiver 1402.

A second transmitter 1401 transmitting a first signal, the first signal including second channel information;

A third receiver 1402 that receives the first signaling and the second signal;

in embodiment 14, the first channel information and the second channel information are used together to determine a candidate index set, the sender of the first signaling performing a first measurement to determine the first channel information; the first signaling is used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; the first index is one candidate index in the candidate index set; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink.

As an embodiment, the sender of the second signal assumes that the error probability of the transport block corresponding to the second signal received by the second node when the modulation coding mode corresponding to the first index is adopted is not greater than a first threshold; the first threshold is fixed or configured by higher layer signaling.

As an example, the second transmitter 1401 includes at least the first 4 of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, and the controller/processor 475 in example 4.

As an example, the third receiver 1402 includes at least the first 4 of the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, and the controller/processor 475 of example 4.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described methods may be implemented by a program that instructs associated hardware, and the program may be stored on a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment may be implemented in a hardware form or may be implemented in a software functional module form, and the present application is not limited to any specific combination of software and hardware. The first node and the second node in the application comprise, but are not limited to, mobile phones, tablet computers, notebooks, network cards, low-power consumption devices, eMTC devices, NB-IoT devices, vehicle-mounted communication devices, vehicles, RSUs, aircrafts, unmanned planes, remote control aircrafts and other wireless communication devices. The base station in the present application includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, an eNB, a gNB, a transmission receiving node TRP, a GNSS, a relay satellite, a satellite base station, an air base station, an RSU, and other wireless communication devices.

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A first node for wireless communication, comprising:

a first transmitter that transmits a first signaling and a second signal;

Wherein the first channel information and the second channel information are used together to determine a candidate index set, the first signaling being used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; the first index is one candidate index in the candidate index set; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink; the first channel information is a channel busy ratio; the first index is used to indicate an MCS of the second signal; the physical layer channel occupied by the second signal includes a physical sidelink shared channel.

2. The first node of claim 1, wherein the first channel information and the second channel information are used together to determine the meaning of a candidate index set comprises: the first index is not greater than the sum of the second index and the first offset; the first offset is related to the first channel information; the second index is related to the second channel information.

3. The first node of claim 1, wherein the first channel information and the second channel information are used together to determine the meaning of a candidate index set comprises: the first index is not greater than the sum of the second index and the second offset, and the first index is not less than the difference between the second index and the third offset; the second offset and the third offset are both related to the first channel information; the second index is related to the second channel information.

4. A first node according to any of claims 1-3, characterized in that a first set of indices is related to the first channel information, any candidate index of the candidate index sets belonging to the first set of indices.

5. The first node of claim 4, wherein the second channel information is used to indicate a second index, the second index corresponding to a second spectral efficiency value, the first set of indices corresponding to a first spectral efficiency value interval, the second spectral efficiency value not belonging to the first spectral efficiency value interval; the first index set comprises K1 first type indexes; the candidate index set includes only the smallest first-class index in the first index set, or the candidate index set includes only the largest first-class index in the first index set.

6. The first node according to any one of claims 1 to 5, wherein the receiver of the second signal includes a second node, and the first node assumes that an error probability of a transport block corresponding to the second signal received by the second node when the modulation coding scheme corresponding to the first index is adopted is not greater than a first threshold; the first threshold is fixed or configured by higher layer signaling.

7. The first node according to any of claims 1 to 6, characterized in that the second channel information is CQI for a sidelink.

8. The first node according to any of claims 1-7, wherein the first channel information indicates a number of time slots where the received channel strength indication over the first set of frequency domain resources detected in a given time window is greater than a given threshold.

9. The first node according to any of claims 1 to 8, wherein the second channel information is CSI for a sidelink.

10. The first node according to any of the claims 1 to 9, characterized in that said first signaling is a SCI.

11. The first node according to any of claims 1-10, characterized in that the physical layer channel occupied by the first signal comprises a PSSCH.

12. The first node according to any of claims 1 to 11, wherein the first signaling is used to indicate time domain resources occupied by the second signal.

13. The first node according to any of claims 1 to 12, wherein the first signaling is used to indicate frequency domain resources occupied by the second signal.

14. The first node according to any of claims 1-13, characterized in that the physical layer channel occupied by the first signaling comprises a PSCCH.

15. The first node according to any of claims 1 to 14, wherein the first channel information is a positive integer not less than 0 and not more than 100.

16. A second node for wireless communication, comprising:

a third receiver that receives the first signaling and the second signal;

Wherein first channel information and the second channel information are used together to determine a set of candidate indices, a sender of the first signaling performing a first measurement to determine the first channel information; the first signaling is used to indicate a first index; the first index is used for determining a modulation coding mode of the second signal; the first index is one candidate index in the candidate index set; the first signaling is physical layer signaling; the second channel information is channel information for a sidelink; the first channel information is a channel busy ratio; the first index is used to indicate an MCS of the second signal; the physical layer channel occupied by the second signal includes a physical sidelink shared channel.

17. The second node of claim 16, wherein the first channel information and the second channel information are used together to determine the meaning of a candidate index set comprises: the first index is not greater than the sum of the second index and the first offset; the first offset is related to the first channel information; the second index is related to the second channel information.

18. The second node of claim 16, wherein the first channel information and the second channel information are used together to determine the meaning of a candidate index set comprises: the first index is not greater than the sum of the second index and the second offset, and the first index is not less than the difference between the second index and the third offset; the second offset and the third offset are both related to the first channel information; the second index is related to the second channel information.

19. The second node according to any of claims 16 to 18, wherein a first set of indices is related to the first channel information, any candidate index of the candidate set of indices belonging to the first set of indices.

20. The second node according to claim 19, wherein the second channel information is used to indicate a second index, the second index corresponding to a second spectral efficiency value, the first set of indices corresponding to a first spectral efficiency value interval, the second spectral efficiency value not belonging to the first spectral efficiency value interval; the first index set comprises K1 first type indexes; the candidate index set includes only the smallest first-class index in the first index set, or the candidate index set includes only the largest first-class index in the first index set.

21. The second node according to any of claims 16 to 20, wherein the sender of the second signal comprises a first node, and the first node assumes that the error probability of the transport block corresponding to the second signal received by the second node when the modulation coding scheme corresponding to the first index is adopted is not greater than a first threshold; the first threshold is fixed or configured by higher layer signaling.

22. The second node according to any of claims 16 to 21, characterized in that the second channel information is CQI for a sidelink.

23. The second node according to any of claims 16 to 22, wherein the first channel information indicates a number of time slots where the received channel strength indication over the first set of frequency domain resources detected in a given time window is greater than a given threshold.

24. The second node according to any of claims 16-23, characterized in that the second channel information is CSI for a sidelink.

25. The second node according to any of the claims 16-24, characterized in that the first signaling is a SCI.

26. The second node according to any of claims 16-25, wherein the physical layer channel occupied by the first signal comprises a PSSCH.

27. The second node according to any of claims 16 to 26, wherein the first signaling is used to indicate time domain resources occupied by the second signal.

28. The second node according to any of claims 16 to 27, wherein the first signaling is used to indicate frequency domain resources occupied by the second signal.

29. The second node according to any of claims 16-28, wherein the physical layer channel occupied by the first signaling comprises a PSCCH.

30. The second node according to any of claims 16 to 29, wherein the first channel information is a positive integer not less than 0 and not more than 100.

31. A method for a first node of wireless communication, comprising:

performing a first measurement to determine first channel information;

transmitting a first signaling and a second signal;

32. The method of claim 31, wherein the first channel information and the second channel information are used together to determine the meaning of a candidate index set comprises: the first index is not greater than the sum of the second index and the first offset; the first offset is related to the first channel information; the second index is related to the second channel information.

33. The method of claim 31, wherein the first channel information and the second channel information are used together to determine the meaning of a candidate index set comprises: the first index is not greater than the sum of the second index and the second offset, and the first index is not less than the difference between the second index and the third offset; the second offset and the third offset are both related to the first channel information; the second index is related to the second channel information.

34. The method according to any of claims 31 to 33, wherein a first set of indices is related to the first channel information, any candidate index of the candidate index sets belonging to the first set of indices.

35. The method of claim 34, wherein the second channel information is used to indicate a second index, the second index corresponding to a second spectral efficiency value, the first set of indices corresponding to a first spectral efficiency value interval, the second spectral efficiency value not belonging to the first spectral efficiency value interval; the first index set comprises K1 first type indexes; the candidate index set includes only the smallest first-class index in the first index set, or the candidate index set includes only the largest first-class index in the first index set.

36. The method according to any one of claims 31 to 35, wherein the receiver of the second signal comprises a second node, and the first node assumes that the error probability of the transport block corresponding to the second signal received by the second node when the modulation coding scheme corresponding to the first index is adopted is not greater than a first threshold; the first threshold is fixed or configured by higher layer signaling.

37. The method of a first node according to any of claims 31-36, characterized in that the second channel information is CQI for a sidelink.

38. The method according to any of claims 31 to 37, wherein the first channel information indicates a number of time slots in which the received channel strength indication over the first set of frequency domain resources detected in a given time window is greater than a given threshold.

39. The method of a first node according to any of claims 31-38, wherein the second channel information is CSI for a sidelink.

40. The method of a first node according to any of the claims 31-39, characterized in that said first signaling is a SCI.

41. The method of any one of claims 31 to 40, wherein the physical layer channel occupied by the first signal comprises a PSSCH.

42. A method according to any of claims 31 to 41, wherein the first signalling is used to indicate the time domain resources occupied by the second signal.

43. A method according to any of claims 31 to 42, wherein the first signalling is used to indicate the frequency domain resources occupied by the second signal.

44. A method according to any of claims 31 to 43, wherein the physical layer channel occupied by the first signalling comprises a PSCCH.

45. The method of any one of claims 31 to 44, wherein the first channel information is a positive integer not less than 0 and not more than 100.

46. A method for a second node of wireless communication, comprising:

receiving a first signaling and a second signal;

47. The method of claim 46, wherein the first channel information and the second channel information are used together to determine the meaning of a candidate index set comprises: the first index is not greater than the sum of the second index and the first offset; the first offset is related to the first channel information; the second index is related to the second channel information.

48. The method of claim 46, wherein the first channel information and the second channel information are used together to determine the meaning of a candidate index set comprises: the first index is not greater than the sum of the second index and the second offset, and the first index is not less than the difference between the second index and the third offset; the second offset and the third offset are both related to the first channel information; the second index is related to the second channel information.

49. A method according to any of claims 46 to 48, wherein a first set of indices is associated with the first channel information, any candidate index of the candidate set of indices belonging to the first set of indices.

50. The method of claim 49, wherein the second channel information is used to indicate a second index, the second index corresponding to a second spectral efficiency value, the first set of indices corresponding to a first spectral efficiency value interval, the second spectral efficiency value not belonging to the first spectral efficiency value interval; the first index set comprises K1 first type indexes; the candidate index set includes only the smallest first-class index in the first index set, or the candidate index set includes only the largest first-class index in the first index set.

51. A method according to any one of claims 46 to 50, wherein the sender of the second signal comprises a first node that assumes that the probability of an error of a transport block to which the second signal received by the second node corresponds when the modulation and coding scheme to which the first index corresponds is not greater than a first threshold; the first threshold is fixed or configured by higher layer signaling.

52. A method of a second node according to any of claims 46 to 51, characterized in that the second channel information is CQI for a sidelink.

53. The method of any of claims 46 to 52, wherein the first channel information indicates a number of time slots in which the received channel strength indication over the first set of frequency domain resources detected in the given time window is greater than a given threshold.

54. A method according to any of claims 46 to 53, wherein the second channel information is CSI for a sidelink.

55. The method of any one of claims 46 to 54 wherein the first signaling is a SCI.

56. A method according to any of claims 46 to 55, wherein the physical layer channel occupied by the first signal comprises a PSSCH.

57. A method as claimed in any one of claims 46 to 56, wherein the first signalling is used to indicate the time domain resources occupied by the second signal.

58. A method as claimed in any one of claims 46 to 57, wherein the first signalling is used to indicate the frequency domain resources occupied by the second signal.

59. A method according to any of claims 46 to 58, wherein the physical layer channel occupied by the first signalling comprises a PSCCH.

60. A method according to any of claims 46 to 59, wherein the first channel information is a positive integer not less than 0 and not more than 100.