CN112312484B

CN112312484B - Method and apparatus in a node used for wireless communication

Info

Publication number: CN112312484B
Application number: CN201910679927.5A
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: 2019-07-26
Filing date: 2019-07-26
Publication date: 2022-10-28
Anticipated expiration: 2039-07-26
Also published as: CN112312484A

Abstract

A method and apparatus in a node used for wireless communication is disclosed. A first node firstly receives a first signal, then determines a first air interface resource block and sends a first sequence in the first air interface resource block; a first set of blocks of bits is used to generate the first signal, the first sequence being used to indicate whether the first set of blocks of bits was received correctly; the first empty resource block is one of K1 candidate empty resource blocks; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; the first signal and the first sequence are both transmitted on a sidelink. According to the method and the device, the transmission mode of the first sequence is designed to be linked with the position where the first sequence is actually sent, so that the transmission robustness of a feedback channel on the sidelink is improved, and the spectrum efficiency of transmission on the sidelink is improved.

Description

Method and apparatus in a node used for wireless communication

Technical Field

The present application relates to a transmission method and apparatus in a wireless communication system, and more particularly, to a transmission method and apparatus related to a Sidelink (Sidelink) in wireless communication.

Background

In the future, the application scenes of the wireless communication system are more and more diversified, and different application scenes put different performance requirements on the system. In order to meet different performance requirements of various application scenarios, research on New air interface technology (NR, new Radio) (or Fifth Generation, 5G) is decided over #72 sessions of 3GPP (3 rd Generation Partner Project) RAN (Radio Access Network), and standardization Work on NR begins over 3GPP RAN #75 sessions over WI (Work Item ) of NR.

For the rapidly evolving Vehicle-to-evolution (V2X) service, the 3GPP initiated standard formulation and research work under the NR framework. At present, 3GPP has completed the work of formulating requirements for the 5G V2X service, and has written standard TS22.886. The 3GPP defines a 4-large application scenario group (Use Case Groups) for the 5G V2X service, including: automatic in-line Driving (Vehicles platform), extended sensing (Extended Sensors), semi/full automatic Driving (Advanced Driving) and Remote Driving (Remote Driving). NR-based V2X technical studies have been initiated on the 3GPP ran #80 event.

Disclosure of Invention

Compared with the existing LTE (Long-term Evolution) V2X system, one significant feature of NR V2X is to support unicast and multicast and support HARQ (Hybrid Automatic Repeat reQuest) function. A PSFCH (Physical Sidelink Feedback Channel) Channel is introduced for HARQ-ACK (Acknowledgement) transmission on the secondary link. The PSFCH resources may be configured or preconfigured periodically according to the results of the 3gpp ran1 #96bconference.

Over the 3gpp ran1#97 session, it is determined whether the psch (Physical Sidelink Shared Channel) is correctly received by the receiving end of V2X using Sequence-based (Sequence-based) PSFCH feedback, and whether repeated (Repetition) transmission of the PSFCH is supported needs to be further considered. Currently, in a V2X system, a terminal device can obtain a time-frequency resource for sending a PSSCH by receiving a configuration from a base station or channel sensing, and further determine a position of the time-frequency resource occupied by a PSFCH. However, in addition to communicating with a peer terminal device, a terminal in V2X also communicates with a base station through a cellular link and communicates with other terminals in V2X. Considering that the cellular link transmission has higher priority and the uncertainty of the channel sensing result, only reserving one time-frequency resource location for the PSFCH transmission will not guarantee that the PSFCH will be successfully transmitted. Based on this, a solution is to reserve multiple time-frequency resource locations for the PSFCH, and how to transmit the PSFCH on the multiple time-frequency resource locations will be a problem to be solved.

In view of the above, the present application discloses a solution. It should be noted that, without conflict, the embodiments and features in the embodiments in the first node of the present application may be applied to the second node and vice versa. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

The application discloses a method in a first node used for wireless communication, characterized by comprising:

receiving a first signal;

determining a first air interface resource block, and sending a first sequence in the first air interface resource block;

wherein a first set of bit blocks is used to generate the first signal, the first sequence being used to indicate whether the first set of bit blocks was received correctly; the first air interface resource block is one candidate air interface resource block in the K1 candidate air interface resource blocks; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on a sidelink.

As an example, the above method has the benefits of: establishing a relation between the repeated transmission times of the first sequence in the time domain and the position of the first air interface resource block in the K1 candidate air interface resource blocks, namely in the K1 candidate air interface resource blocks, when the first sequence is transmitted later, the first sequence needs to be transmitted repeatedly; and further improve the robustness of the first sequence transmission.

As an example, another benefit of the above method is: the later the first sequence is sent, which indicates that the previous candidate air interface resource blocks which cannot send the first sequence are occupied by higher priority transmission or are subjected to larger interference, and further when opportunity transmission of the PSFCH is obtained at a later position in the K1 candidate air interface resource blocks, the robustness of the PSFCH needs to be improved to ensure that one-time transmission is correct, that is, a time domain repetition mode is adopted to improve the robustness of the PSFCH transmission.

According to an aspect of the present application, the method is characterized in that, when the first air interface resource block is an earliest candidate air interface resource block in the time domain among the K1 candidate air interface resource blocks, the first sequence is transmitted in the first air interface resource block in the time domain for a single time; when the first air interface resource block is a candidate air interface resource block other than the earliest candidate air interface resource block in the time domain among the K1 candidate air interface resource blocks, the first sequence is repeatedly transmitted in the time domain in the first air interface resource block.

According to one aspect of the application, the above method is characterized by comprising:

performing channel monitoring in a first time window;

wherein the channel monitoring is used to determine the first air interface resource block from the K1 candidate air interface resource blocks.

As an example, the above method has the benefits of: the first node needs to perform channel monitoring on the K1 candidate air interface resource blocks to determine a time-frequency resource which can be actually used for transmitting the PSFCH, so as to avoid interference between the PSFCH and other signals.

As an example, another benefit of the above method is: the interference may be from terminals outside the serving cell of the first node, or some terminals in an RRC non-connected state (non-connected).

receiving a target signaling;

wherein the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks are used for transmission of a cellular link, or the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks are used for transmission of a given signal, where the priority of the given signal is higher than that of the first signal; the K2 is a positive integer greater than 0 and smaller than K1, and the first air interface resource block is a candidate air interface resource block out of the K1 candidate air interface resource blocks and the K2 candidate air interface resource blocks.

As an example, the above method has the benefits of: signal transmission with higher priority is guaranteed, or the signal transmission on the cellular link has higher priority than the PSFCH, so that more important signals can be sent preferentially.

receiving a first signaling;

wherein the first signaling is physical layer signaling, the first signaling including configuration information of the first signal.

receiving a second signal;

wherein a second set of bit blocks is used to generate a second signal, a second HARQ-ACK is used to indicate whether the second set of bit blocks was received correctly, a first HARQ-ACK is used to indicate whether the first set of bit blocks was received correctly; the first empty resource block is reserved for transmitting the second HARQ-ACK; the first HARQ-ACK and the second HARQ-ACK are used together to generate the first sequence.

As an example, the above method has the benefits of: the first air interface resource block can also be reserved for nodes other than the first node to be used for transmitting PSFCH, and when multiple HARQ-ACK transmissions on the secondary link are overlapped on time-frequency resources, the multiple HARQ-ACK transmissions are multiplexed (Multiplexing) to improve the spectrum efficiency.

receiving a second signaling;

wherein the second signaling is used to determine the K1 candidate air interface resource blocks.

The application discloses a method in a second node used for wireless communication, characterized by comprising:

transmitting a first signal;

detecting a first sequence in K1 candidate air interface resource blocks;

wherein a first set of bit blocks is used to generate the first signal, the first sequence being used to indicate whether the first set of bit blocks was received correctly; a first air interface resource block is one of the K1 candidate air interface resource blocks, and the first sequence is sent in the first air interface resource block; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on a sidelink.

sending a first signaling;

transmitting a second signal;

wherein a second set of bit blocks is used to generate a second signal, a second HARQ-ACK is used to indicate whether the second set of bit blocks was received correctly, a first HARQ-ACK is used to indicate whether the first set of bit blocks was received correctly; the first air interface resource block is reserved for transmitting the second HARQ-ACK; the first HARQ-ACK and the second HARQ-ACK are used together to generate the first sequence.

receiving a second signaling;

The application discloses a method in a third node used for wireless communication, characterized by comprising:

sending a target signaling;

wherein the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks are used for transmission of a cellular link, or the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks are used for transmission of a given signal, and the priority of the given signal is higher than that of the first signal; k2 is a positive integer greater than 0 and less than K1; the first air interface resource block is a candidate air interface resource block which is out of the K1 candidate air interface resource blocks and the K2 candidate air interface resource blocks; the receiver of the target signaling comprises a first node that sends a first sequence in the first resource block of air ports that is used to indicate whether a first set of bit blocks is correctly received by the first node; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; the first set of bit blocks is used to generate a first signal, the first signal and the first sequence are both transmitted on a sidelink; and K1 is a positive integer greater than 1.

sending a second signaling;

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

a first receiver receiving a first signal;

the first transceiver determines a first air interface resource block and sends a first sequence in the first air interface resource block;

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

a first transmitter that transmits a first signal;

the second receiver detects a first sequence in the K1 candidate air interface resource blocks;

The application discloses be used for wireless communication's third node, its characterized in that includes:

a second transmitter for transmitting the target signaling;

wherein the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks are used for transmission of the cellular link, or the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks are used for transmission of a given signal, and the priority of the given signal is higher than that of the first signal; k2 is a positive integer greater than 0 and less than K1; the first air interface resource block is a candidate air interface resource block out of the K1 candidate air interface resource blocks and the K2 candidate air interface resource blocks; the receiver of the target signaling comprises a first node, wherein the first node receives the first signal and sends a first sequence in the first air interface resource block; the first sequence is used to indicate whether a first set of bit blocks is correctly received by the first node; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; the first set of bit blocks is used to generate a first signal, the first signal and the first sequence are both transmitted on a sidelink; and K1 is a positive integer greater than 1.

As an example, compared with the conventional scheme, the present application has the following advantages:

establishing a relationship between the number of times of retransmission of the first sequence in the time domain and the position of the first empty resource block in the K1 candidate empty resource blocks, that is, in the K1 candidate empty resource blocks, when the first sequence is sent later, the first sequence needs to be retransmitted; the robustness of the first sequence transmission is further improved;

the later the first sequence is sent, which indicates that the previous candidate air interface resource blocks which cannot send the first sequence are occupied by higher priority transmission or are subjected to larger interference, and further when opportunity transmission of the PSFCH is obtained at a later position in the K1 candidate air interface resource blocks, the robustness of the PSFCH needs to be improved to ensure that one-time transmission is correct, that is, a time domain repetition mode is adopted to improve the robustness of the PSFCH transmission;

the first node needs to perform channel monitoring on the K1 candidate air interface resource blocks to determine a time-frequency resource which can be actually used for transmitting the PSFCH, so as to avoid interference between the PSFCH and other signals;

signal transmission with higher priority is guaranteed, or the signal transmission on the cellular link has higher priority than the PSFCH, thus guaranteeing that more important signals can be sent first;

the first air interface resource block can also be reserved for nodes other than the first node to use for transmission of the PSFCH, and when there is overlap of multiple HARQ-ACK transmissions on the secondary link on the time-frequency resource, the multiple HARQ-ACKs are multiplexed (multiplexed) to improve the spectrum efficiency.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of the non-limiting embodiments 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 present application;

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

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

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

FIG. 5 shows a flow diagram of a first signal according to an embodiment of the present application;

FIG. 6 shows a flow diagram of target signaling according to one embodiment of the present application;

figure 7 shows a schematic diagram of a first empty resource block according to one embodiment of the present application;

fig. 8 shows a schematic diagram of K1 candidate air interface resource blocks according to an embodiment of the present application;

fig. 9 shows a schematic diagram of K1 candidate air interface resource blocks according to another embodiment of the present application;

FIG. 10 shows a diagram of a first sequence being transmitted a single time in the time domain, according to an embodiment of the present application;

FIG. 11 shows a diagram of a first sequence being transmitted a single time in the time domain, according to another embodiment of the present application;

fig. 12 shows a schematic diagram of a first sequence being repeatedly transmitted in the time domain according to an embodiment of the present application;

fig. 13 shows a schematic diagram in which a first sequence is repeatedly transmitted in a time domain according to another embodiment of the present application;

fig. 14 shows a schematic diagram of K2 candidate air interface resource blocks according to an embodiment of the present application;

figure 15 shows a schematic diagram of a first HARQ-ACK and a second HARQ-ACK according to an embodiment of the present application;

FIG. 16 shows a block diagram of a structure used in a first node according to an embodiment of the present application;

figure 17 shows a block diagram of a structure for use in a second node according to an embodiment of the present application;

fig. 18 shows a block diagram of a structure used in a third node according to an embodiment of the present application.

Detailed Description

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

Example 1

Embodiment 1 illustrates a processing 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 receives a first signal at step 101; a first resource block of the null is determined in step 102 and a first sequence is transmitted in said first resource block of the null.

In embodiment 1, a first set of blocks of bits is used to generate the first signal, the first sequence being used to indicate whether the first set of blocks of bits was received correctly; the first air interface resource block is one candidate air interface resource block in the K1 candidate air interface resource blocks; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on a sidelink.

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

As one embodiment, the first signal is a baseband signal.

As an embodiment, the first signal occupies the psch at the physical layer.

As an embodiment, the first signal occupies a target air interface resource block, and the target air interface resource block is used to determine the K1 candidate air interface resource blocks.

As an embodiment, the scheduling signaling of the first signal is used to indicate the K1 candidate air interface resource blocks.

As one embodiment, the first set of bit blocks includes a positive integer number of bit blocks.

As an embodiment, the first set of bit blocks comprises only 1 bit block.

As one embodiment, the first set of bit blocks includes a plurality of bit blocks.

As an embodiment, each bit block comprised by the first set of bit blocks comprises a positive integer number of binary bits.

As an embodiment, any one of the bit blocks included in the first set of bit blocks is a Transport Block (TB).

As an embodiment, any one bit Block included in the first bit Block set is a CBG (Code Block Group).

As an embodiment, the first set of bit blocks is Unicast (Unicast) transmitted.

As an embodiment, the first set of bit blocks is transferred by multicast (Groupcast).

As an embodiment, the first set of bit blocks is transmitted on a SideLink (SideLink).

As an embodiment said first set of bit blocks is transmitted over a PC5 interface.

As one embodiment, the first sequence carries HARQ-ACKs for the first set of bit blocks.

As an embodiment, the first sequence comprises a pseudo-random sequence.

In one embodiment, the first sequence comprises a Zadoff-Chu sequence.

As an embodiment, the first sequence includes a CP (Cyclic Prefix).

As an embodiment, the physical layer channel occupied by the first sequence includes a PSFCH.

As a sub-embodiment of this embodiment, the PSFCH adopts PUCCH format 0.

As an embodiment, the first sequence is used to carry N information bits, the N information bits being used to indicate whether the first set of blocks of bits is received correctly; and N is a non-negative integer.

As a sub-embodiment of this embodiment, the first sequence is one of the candidate sequences of the power of N of 2, and the candidate sequences of the power of N of 2 are used to carry the N information bits.

As an embodiment, the first air interface resource block occupies a positive integer of multicarrier symbols in a time domain and occupies a positive integer of subcarriers in a frequency domain.

As an embodiment, the first empty Resource Block occupies M1 multicarrier symbols in a time domain, and occupies frequency domain resources corresponding to M2 RBs (Resource blocks ) in a frequency domain.

As a sub-embodiment of this embodiment, said M1 is a positive integer.

As a sub-embodiment of this embodiment, the first air interface resource block is an earliest candidate air interface resource block located in a time domain among the K1 candidate air interface resource blocks, and M1 is equal to 1.

As a sub-embodiment of this embodiment, the first air interface resource block is a candidate air interface resource block, which is located outside an earliest candidate air interface resource block in the time domain, from among the K1 candidate air interface resource blocks, and M1 is equal to 2.

As a sub-embodiment of this embodiment, said M2 is equal to 1.

As a sub-embodiment of this embodiment, said M2 is a positive integer greater than 1.

As a sub-embodiment of this embodiment, M2 is greater than 1, and the first sequence is repeated M2 times in the frequency domain resources corresponding to the M2 RBs.

As an embodiment, any two of the K1 candidate air interface Resource blocks occupy the same number of REs (Resource elements).

As an embodiment, a first candidate air interface resource block located in a time domain of the K1 candidate air interface resource blocks occupies Q1 REs, and any candidate air interface resource block of other (K1-1) candidate air interface resource blocks of the K1 candidate air interface resource blocks occupies (Q1 × 2) REs, where Q1 is a positive integer greater than 1; q1 is a positive integer greater than 1.

As an embodiment, any two candidate air interface resource blocks in the K1 candidate air interface resource blocks occupy the same number of multicarrier symbols.

As an embodiment, the first candidate air interface resource block located in the time domain of the K1 candidate air interface resource blocks occupies 1 multicarrier symbol, and any one candidate air interface resource block of other (K1-1) candidate air interface resource blocks of the K1 candidate air interface resource blocks occupies 2 multicarrier symbols.

As an embodiment, a given candidate air interface resource block is an ith candidate air interface resource block of the K1 candidate air interface resource blocks in a time domain, the given candidate air interface resource block occupies i multicarrier symbols in the time domain, and i is a positive integer not greater than K1.

As an embodiment, a given candidate air interface resource block is an ith candidate air interface resource block of the K1 candidate air interface resource blocks in a time domain, the given candidate air interface resource block occupies (i × Q1) REs, i is a positive integer not greater than K1, Q1 is a positive integer greater than 1, and Q1 is unrelated to i.

As an example, said Q1 in the present application is equal to 12.

As an example, Q1 in this application is a positive integer multiple of 12.

As an embodiment, the multicarrier symbol in this application is an OFDM (Orthogonal Frequency Division Multiplexing) symbol.

As an embodiment, the multicarrier symbol in this application is an SC-FDMA (Single-Carrier Frequency Division Multiple Access) symbol.

As an embodiment, the Multi-Carrier symbol in this application is an FBMC (Filter Bank Multi Carrier) symbol.

As an embodiment, the multicarrier symbol in this application is an OFDM symbol including a CP (Cyclic Prefix).

As an example, the multi-carrier symbol in this application is a DFT-s-OFDM (Discrete Fourier Transform spread Orthogonal Frequency Division Multiplexing) symbol including a CP.

As an embodiment, the secondary link refers to a wireless link between terminals.

As an embodiment, the sender of the first signal is a terminal.

As an example, the cellular link described in this application is a radio link between a terminal and a base station.

As an example, the sidelink in this application corresponds to a PC5 port.

As an embodiment, the cellular link in this application corresponds to a Uu port.

As an example, the sidelink in this application is used for V2X communication.

As an example, the cellular link in the present application is used for cellular communication.

As an embodiment, the transmission mode adopted by the first signal is mode 1.

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 for the 5g nr, LTE (Long-Term Evolution, long Term Evolution) and LTE-a (Long-Term Evolution Advanced) systems. The 5G NR or LTE network architecture 200 may be referred to as EPS (Evolved Packet System) 200 or some other suitable terminology. The EPS 200 may include one or more UEs (User Equipment) 201, and includes one UE241 in sidelink communication with the UE201, an NG-RAN (next generation radio access Network) 202, an epc (Evolved Packet Core)/5G-CN (5G-Core Network,5G Core Network) 210, an hss (Home Subscriber Server) 220, and an internet service 230. The EPS may interconnect with other access networks, but these entities/interfaces are not shown for simplicity. As shown, the EPS provides packet-switched services, however those skilled in the art will readily appreciate that the various concepts presented throughout this application 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 terminations towards the UE 201. The gnbs 203 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 (transmitting receiving node), or some other suitable terminology. The gNB203 provides an access point for the UE201 to the EPC/5G-CN 210. Examples of the UE201 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, non-terrestrial base station communications, satellite mobile communications, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a drone, an aircraft, a narrowband internet of things device, a machine type communication device, a terrestrial vehicle, an automobile, a wearable device, or any other similar functioning device. Those skilled in the art may also refer to 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 connects to the EPC/5G-CN 210 through the S1/NG interface. The EPC/5G-CN 210 includes MME (Mobility Management Entity)/AMF (Authentication Management Domain)/UPF (User Plane Function) 211, other MMEs/AMF/UPF 214, S-GW (Service Gateway) 212, and P-GW (Packet data Network Gateway) 213.MME/AMF/UPF211 is a control node that handles signaling between UE201 and EPC/5G-CN 210. In general, the MME/AMF/UPF211 provides bearer and connection management. All user IP (Internet protocol) packets are transmitted through S-GW212, and S-GW212 itself is connected to P-GW213. The P-GW213 provides UE IP address allocation as well as other functions. The P-GW213 is connected to the internet service 230. The internet service 230 includes an operator-corresponding internet protocol service, and may specifically include the internet, an intranet, an IMS (IP Multimedia Subsystem), and a packet-switched streaming service.

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

As an embodiment, the gNB203 corresponds to the third node in this application.

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

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

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 gNB203 is a cellular link.

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

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

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

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

For one embodiment, the UE201 and the UE241 support unicast transmission.

For one embodiment, the UE201 and the UE241 support broadcast transmission.

As an embodiment, the UE201 and the UE241 support multicast transmission.

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

As one embodiment, the first node is a car.

As one embodiment, the first node is a vehicle.

As an embodiment, the third node is a base station.

As an embodiment, the second node is a vehicle.

As one example, the second node is a car.

As an example, the second node is an RSU (Road Side Unit).

For one embodiment, the second node is a Group Header (Group Header) of a terminal Group.

As an embodiment, the first node is an RSU.

As an embodiment, the first node is a group head of a group of terminals.

Example 3

Embodiment 3 shows a schematic diagram of an embodiment of a radio protocol architecture for a user plane and a control plane according to the present 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 showing the radio protocol architecture for the first communication node device (UE, RSU in gbb or V2X) and the second communication node device (gbb, RSU in UE or V2X), or the control plane 300 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 the PHY301 and is responsible for the link between the first and second communication node devices and the two UEs through the PHY301. The L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) 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 data packets and provides handoff support between second communication node devices to the first communication node device. The RLC sublayer 303 provides segmentation and reassembly of upper layer packets, retransmission of lost packets, and reordering of 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 various radio resources (e.g., resource blocks) in one cell between the first communication node devices. The MAC sublayer 302 is also responsible for HARQ operations. A 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 comprises layer 1 (L1 layer) and layer 2 (L2 layer), the radio protocol architecture in the user plane 350 for the first and second communication node devices is substantially the same for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355 and the 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 packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 further includes a Service Data Adaptation Protocol (SDAP) sublayer 356, and the SDAP sublayer 356 is responsible for mapping between QoS streams and Data Radio Bearers (DRBs) to support Service diversity. Although not shown, the first communication node device 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., far end UE, server, etc.).

As an example, the wireless protocol architecture in fig. 3 is applicable to the first node in this application.

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

The radio protocol architecture of fig. 3 applies, as an example, to the third node in the present application.

For one embodiment, the first signal is generated at the MAC352 or the MAC302.

For one embodiment, the first signal is generated from the PHY301 or the PHY351.

For one embodiment, the first sequence is generated at the MAC352 or the MAC302.

For one embodiment, the first sequence is generated from the PHY301 or the PHY351.

For one embodiment, the target signaling is generated in the MAC352 or the MAC302.

For one embodiment, the target signaling is generated in the PHY301 or the PHY351.

For one embodiment, the first signaling is generated from the PHY301 or the PHY351.

For one embodiment, the first signaling is generated in the MAC352 or the MAC302.

For one embodiment, the second signal is generated at the MAC352, or the MAC302.

For one embodiment, the second signal is generated from the PHY301 or the PHY351.

For one embodiment, the first HARQ-ACK is generated at the MAC352 or the MAC302.

For one embodiment, the first HARQ-ACK is generated at the PHY301 or the PHY351.

For one embodiment, the second HARQ-ACK is generated at the MAC352 or the MAC302.

For one embodiment, the second HARQ-ACK is generated at the PHY301 or the PHY351.

As an embodiment, the second signaling is generated at the RRC306.

As an embodiment, the second signaling is generated in 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 present 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 communications 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 multiple antenna receive processor 472, a multiple 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, at the second communication device 410, upper layer data packets from the core network are provided to the controller/processor 475. The controller/processor 475 implements the functionality of the L2 layer. In transmissions from the second communications device 410 to the first communications device 450, the controller/processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communications 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., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate Forward Error Correction (FEC) at the second communication device 410, as well as mapping of signal constellation 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 performs digital spatial precoding, including codebook-based precoding and non-codebook based precoding, and beamforming processing on the coded and modulated symbols to generate one or more spatial streams. Transmit processor 416 then maps each spatial stream to subcarriers, 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 the physical channels carrying the time-domain multicarrier symbol streams. 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 multi-antenna transmit processor 471 into a radio frequency stream that is then provided to a different antenna 420.

In a transmission from the second communications apparatus 410 to the first communications apparatus 450, each receiver 454 receives a signal through its respective antenna 452 at the first communications apparatus 450. Each receiver 454 recovers information modulated onto a radio frequency carrier and converts the radio frequency stream into a baseband multi-carrier symbol stream that is provided to a receive processor 456. Receive processor 456 and multi-antenna receive processor 458 implement the various signal processing functions of 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. Receive processor 456 converts the baseband multicarrier symbol stream after the receive 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 signals and the reference signals to be used for channel estimation are demultiplexed by the receive processor 456, and the data signals are subjected to multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial streams destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered at 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 transmitted by the second communication device 410 on the physical channel. The upper layer data and control signals are then provided to a 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 transmissions from the second communications device 410 to the second communications device 450, the controller/processor 459 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the core network. The upper layer packet is then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing.

In a transmission from the first communications device 450 to the second communications device 410, a data source 467 is used at the first communications 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 send function at the second communications apparatus 410 described in the transmission from the second communications apparatus 410 to the first communications apparatus 450, the controller/processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, implementing L2 layer functions for the user plane and control plane. The controller/processor 459 is also responsible for retransmission of lost packets and signaling to said second communications device 410. A transmit processor 468 performs modulation mapping, channel coding, and digital multi-antenna spatial precoding by a multi-antenna transmit processor 457 including codebook-based precoding and non-codebook based precoding, and beamforming, and the transmit processor 468 then modulates the resulting spatial streams into multi-carrier/single-carrier symbol streams, which are provided to different antennas 452 via a transmitter 454 after analog precoding/beamforming in the multi-antenna transmit processor 457. 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 the radio frequency symbol stream to the antenna 452.

In a transmission from the first communication device 450 to the second communication device 410, the functionality at the second communication device 410 is similar to the receiving functionality 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 an rf signal through its respective antenna 420, converts the received rf signal to a baseband signal, and provides the baseband signal to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multiple antenna receive processor 472 collectively implement the functionality of the L1 layer. The controller/processor 475 implements the L2 layer functions. The controller/processor 475 can be associated with a memory 476 that stores program codes and data. Memory 476 may be referred to as a computer-readable medium. In transmission from the first communications device 450 to the second communications device 410, the controller/processor 475 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the UE 450. Upper layer data packets from the controller/processor 475 may be provided to a 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 configured to, for use with the at least one processor, the first communication device 450 apparatus at least: receiving a first signal; determining a first air interface resource block, and sending a first sequence in the first air interface resource block; a first set of blocks of bits is used to generate the first signal, the first sequence being used to indicate whether the first set of blocks of bits was received correctly; the first air interface resource block is one candidate air interface resource block in the K1 candidate air interface resource blocks; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on 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 result in actions comprising: receiving a first signal; determining a first air interface resource block, and sending a first sequence in the first air interface resource block; a first set of bit blocks is used to generate the first signal, the first sequence being used to indicate whether the first set of bit blocks is received correctly; the first air interface resource block is one candidate air interface resource block in the K1 candidate air interface resource blocks; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on 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; detecting a first sequence in the K1 candidate air interface resource blocks; a first set of blocks of bits is used to generate the first signal, the first sequence being used to indicate whether the first set of blocks of bits was received correctly; a first air interface resource block is one of the K1 candidate air interface resource blocks, and the first sequence is sent in the first air interface resource block; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on 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 result in actions comprising: transmitting a first signal; detecting a first sequence in K1 candidate air interface resource blocks; a first set of bit blocks is used to generate the first signal, the first sequence being used to indicate whether the first set of bit blocks is received correctly; a first air interface resource block is one of the K1 candidate air interface resource blocks, and the first sequence is sent in the first air interface resource block; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on 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: sending a target signaling; the target signaling is used for determining that K2 candidate air interface resource blocks in the K1 candidate air interface resource blocks are used for transmission of a cellular link, or the target signaling is used for determining that K2 candidate air interface resource blocks in the K1 candidate air interface resource blocks are used for transmission of a given signal, wherein the priority of the given signal is higher than that of a first signal; k2 is a positive integer greater than 0 and less than K1; the first air interface resource block is a candidate air interface resource block which is out of the K1 candidate air interface resource blocks and the K2 candidate air interface resource blocks; the receiver of the target signaling comprises a first node, wherein the first node receives the first signal and sends a first sequence in the first air interface resource block; the first sequence is used to indicate whether a first set of bit blocks is correctly received by the first node; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; the first set of bit blocks is used to generate a first signal, the first signal and the first sequence are both transmitted on a sidelink; and K1 is a positive integer greater than 1.

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 result in actions comprising: sending a target signaling; the target signaling is used for determining that K2 candidate air interface resource blocks in the K1 candidate air interface resource blocks are used for transmission of a cellular link, or the target signaling is used for determining that K2 candidate air interface resource blocks in the K1 candidate air interface resource blocks are used for transmission of a given signal, wherein the priority of the given signal is higher than that of a first signal; k2 is a positive integer greater than 0 and less than K1; the first air interface resource block is a candidate air interface resource block which is out of the K1 candidate air interface resource blocks and the K2 candidate air interface resource blocks; the receiver of the target signaling comprises a first node, and the first node receives the first signal and sends a first sequence in the first air interface resource block; the first sequence is used to indicate whether a first set of bit blocks is correctly received by the first node; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; the first set of bit blocks is used to generate a first signal, the first signal and the first sequence are both transmitted on a sidelink; the K1 is a positive integer greater than 1.

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 second communication device 410 corresponds to a third node in the present application.

For one embodiment, the first communication device 450 is a UE.

For one embodiment, the second communication device 410 is a base station.

For one embodiment, the second communication device 410 is a UE.

For one embodiment, at least one of the antenna 452, the receiver 454, the multiple antenna receive processor 458, the receive processor 456, the controller/processor 459 is configured to receive a first signal; at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller/processor 475 is configured to transmit a first signal.

In an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, and the controller/processor 459 is configured to determine a first resource block of air interfaces.

As one implementation, at least one of the antennas 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, the controller/processor 459 is configured to send a first sequence in the first resource block of air ports.

As one implementation, at least one of the antennas 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, the controller/processor 459 is configured to determine a first resource block of slots and transmit a first sequence in the first resource block of slots; at least one of the antennas 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, and the controller/processor 475 is configured to detect a first sequence in K1 candidate air interface resource blocks.

As one implementation, at least one of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, the controller/processor 459 is configured to perform channel monitoring during a first time window.

For one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459 is configured to receive target signaling; at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller/processor 475 is configured to send target signaling.

For one embodiment, at least one of the antenna 452, the receiver 454, the multiple antenna receive processor 458, the receive processor 456, the controller/processor 459 is configured to receive first signaling; at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller/processor 475 is configured to send first signaling.

For one embodiment, at least one of the antenna 452, the receiver 454, the multiple antenna receive processor 458, the receive processor 456, the controller/processor 459 is configured to receive a second signal; at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, and the controller/processor 475 is configured to transmit a second signal.

For one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459 is configured to receive second signaling; at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, and the controller/processor 475 is configured to send second signaling.

Example 5

Embodiment 5 illustrates a flow chart of a first signal, as shown in fig. 5. In fig. 5, a first node U1 communicates with a second node U2 via a sidelink, and a first node U1 communicates with a third node N3 via a cellular link; the step denoted by block F0 in the figure is optional.

For theFirst node U1Receiving a second signaling in step S10; receiving a first signaling in step S11; receiving a first signal in step S12; in step S13, a first empty resource block is determined, and a first sequence is transmitted in the first empty resource block.

For theSecond node U2Receiving a second signaling in step S20; transmitting a first signaling in step S21; transmitting a first signal in step S22; in step S23, a first sequence is detected in K1 candidate air interface resource blocks.

ForThird node N3In step S30, the second signaling is transmitted.

In embodiment 5, a first set of blocks of bits is used to generate the first signal, the first sequence being used to indicate whether the first set of blocks of bits was received correctly; the first air interface resource block is one candidate air interface resource block in the K1 candidate air interface resource blocks; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on a sidelink; the first signaling is physical layer signaling, the first signaling comprising configuration information of the first signal; the second signaling is used to determine the K1 candidate air interface resource blocks.

As an embodiment, when the first air interface resource block is the earliest candidate air interface resource block in the time domain among the K1 candidate air interface resource blocks, the first sequence is sent in the first air interface resource block in the time domain for a single time; when the first air interface resource block is a candidate air interface resource block other than the earliest candidate air interface resource block in the time domain among the K1 candidate air interface resource blocks, the first sequence is repeatedly transmitted in the time domain in the first air interface resource block.

As a sub-embodiment of this embodiment, the earliest candidate air interface resource block in the K1 candidate air interface resource blocks occupies a multicarrier symbol in the time domain.

As a sub-embodiment of this embodiment, one candidate air interface resource block out of the K1 candidate air interface resource blocks at the earliest time domain occupies multiple multicarrier symbols in the time domain.

As a sub-embodiment of this embodiment, the meaning that the first sequence is transmitted once in the time domain in the first air interface resource block in the above sentence includes: the first air interface resource block only occupies one multi-carrier symbol in a time domain, and the first sequence is transmitted only in the multi-carrier symbol.

As a sub-embodiment of this embodiment, the meaning that the first sequence is transmitted once in the time domain in the first air interface resource block in the above sentence includes: the first space resource block occupies a multi-carrier symbol in a time domain and occupies frequency domain resources corresponding to M2 RBs in a frequency domain; the first sequence is repeated for M2 times only in the occupied frequency domain resources corresponding to the M2 RBs in the one multicarrier symbol, and the first sequence is not repeatedly sent between two different multicarrier symbols; and M2 is a positive integer greater than 1.

As a sub-embodiment of this embodiment, the above sentence that the first sequence is repeatedly transmitted in the first air interface resource block in the time domain includes: the first air interface resource block occupies M1 multi-carrier symbols in a time domain, wherein M1 is a positive integer greater than 1, and the first sequence is transmitted by repeating M1 times in the M1 multi-carrier symbols.

As a sub-embodiment of this embodiment, the above sentence that the first sequence is repeatedly transmitted in the first air interface resource block in the time domain includes: the first air interface resource block occupies M1 multi-carrier symbols in a time domain, and occupies frequency domain resources corresponding to M2 RBs in a frequency domain, the first sequence is transmitted repeatedly for M2 times in the frequency domain resources corresponding to the M2 RBs in one occupied multi-carrier symbol, and the first sequence is transmitted repeatedly for M1 times in the M1 multi-carrier symbols; the M1 is a positive integer larger than 1, and the M2 is a positive integer larger than 1.

As a sub-embodiment of this embodiment, the above sentence that the first sequence is repeatedly transmitted in the first air interface resource block in the time domain includes: the first empty port resource block occupies M1 multi-carrier symbols in a time domain, and occupies frequency domain resources corresponding to M2 RBs in a frequency domain, and the first sequence is transmitted repeatedly (M1 x M2) times in the first empty port resource block; the M1 is a positive integer larger than 1, and the M2 is a positive integer larger than 1.

As an embodiment, the first signaling carries an MCS (Modulation and Coding Scheme) of the first signal.

As an embodiment, the first signaling carries DMRS (DeModulation Reference Signals) configuration information of the first signal.

As an embodiment, the first signaling comprises scheduling information of the first set of bit blocks.

As an embodiment, the DMRS configuration information includes one or more of a port of the DMRS, an occupied time domain resource, an occupied frequency domain resource, an occupied Code domain resource, an RS sequence, a mapping manner, a DMRS type, a cyclic shift amount (cyclic shift), or an OCC (Orthogonal Code).

As an embodiment, the first signaling carries an NDI (New Data Indicator) corresponding to the first signal.

As an embodiment, the first signaling carries an RV (Redundancy Version) corresponding to the first signal.

As an embodiment, the first signaling is used to indicate the target resource block of air interface, and the first signal occupies the target resource block of air interface.

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

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

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

As an embodiment, the Physical layer Channel occupied by the first signaling includes a PSCCH (Physical Sidelink Control Channel).

As an embodiment, the first signaling is used to indicate a priority corresponding to the first signal.

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

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

As an embodiment, the second signaling is higher layer signaling.

As an embodiment, the second signaling is RRC signaling.

As one embodiment, the second signaling is transmitted on a sidelink.

As an embodiment, the second signaling is used to indicate K4 second-type air interface resource blocks, the K1 candidate air interface resource blocks are K1 second-type air interface resource blocks in the K4 second-type air interface resource blocks, and the first signal is used to determine time domain positions of the K1 second-type air interface resource blocks in the K4 second-type air interface resource blocks; the K4 is a positive integer greater than the K1.

As a sub-embodiment of this embodiment, a time interval between a first second-type air interface resource block located in a time domain among the K1 second-type air interface resource blocks and the first signal is not less than a first time interval.

As an additional embodiment of this sub-embodiment, the first time interval is equal to the duration of a positive integer number of time slots in the time domain.

As an additional embodiment of this sub-embodiment, the unit of the first time interval is milliseconds.

As an additional embodiment of the sub-embodiment, the unit of the first time interval is a length of time occupied by one time slot.

As an additional embodiment of this sub-embodiment, the first time interval is equal to a positive integer number of sub-frames in the time domain.

As a subsidiary embodiment of the sub-embodiment, the unit of the first time interval is a length of time occupied by one sub-frame.

As one embodiment, the unit of the first time interval is a sub-slot (sub-slot).

As an embodiment, the unit of the first time interval is a mini-slot.

As an embodiment, the unit of the first time interval is a subframe (subframe).

As one embodiment, the first time interval is a positive integer.

As one embodiment, the first time interval is a non-negative integer.

Example 6

Embodiment 6 illustrates a schematic diagram of target signaling according to an embodiment of the present application; as shown in fig. 6. In fig. 6, the first node U4 communicates with the second node U5 via a sidelink, and the first node U4 communicates with the third node N6 via a cellular link.

For theSection 1Point U4Receiving a target signaling in step S40; receiving a second signal in step S41; in step S12, channel monitoring is performed in a first time window.

For theSecond node U5In step S50, a second signal is transmitted.

For theThird node N6The target signaling is sent in step S60.

In embodiment 6, the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks in the present application are used for transmission of a cellular link, or the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks in the present application are used for transmission of a given signal, where a priority of the given signal is higher than that of the first signal; the K2 is a positive integer greater than 0 and smaller than the K1, and the first air interface resource block is a candidate air interface resource block out of the K1 candidate air interface resource blocks and the K2 candidate air interface resource blocks; the second set of bit blocks is used to generate a second signal, a second HARQ-ACK is used to indicate whether the second set of bit blocks was received correctly, a first HARQ-ACK is used to indicate whether the first set of bit blocks was received correctly; the first empty resource block is reserved for transmitting the second HARQ-ACK; the first HARQ-ACK and the second HARQ-ACK are used together to generate the first sequence; the channel monitoring is used to determine the first air interface resource block from the K1 candidate air interface resource blocks.

For one embodiment, the channel monitoring includes energy detection.

As one embodiment, the channel monitoring includes channel sensing.

As one embodiment, the channel monitoring includes blind detection.

As a sub-embodiment of this embodiment, the blind detection is for the PSCCH.

For one embodiment, the channel monitoring includes coherent detection.

As an embodiment, the first node U4 determines, through channel monitoring, that K3 first-type air interface resource blocks in the first time window are occupied, where the K3 first-type air interface resource blocks respectively correspond to K3 candidate air interface resource blocks in the K1 candidate air interface resource blocks, and the first air interface resource block is one candidate resource block out of the K1 candidate air interface resource blocks and the K3 candidate air interface resource blocks.

As a sub-embodiment of this embodiment, the K3 first-class air interface resource blocks respectively occupy the same frequency domain resources as the K3 candidate air interface resource blocks.

As an embodiment, the third node N6 determines, through the target signaling, that the K2 candidate air interface resource blocks are used for transmission of a cellular link.

As a sub-embodiment of this embodiment, the third node N6 is a base station corresponding to a serving cell of the first node.

As an embodiment, the sender of the target signaling is the same as the sender of the first signal, and the sender of the target signaling determines that the given signal has higher priority than the first signal through the target signaling.

As an embodiment, the sender of the target signaling is different from the sender of the first signal, and the sender of the target signaling determines that the given signal has higher priority than the first signal through the target signaling.

As a sub-embodiment of this embodiment, the sender of the target signaling is a terminal.

For one embodiment, the Priority of the given signal is indicated by a Priority field in a SCI that schedules the given signal.

As an embodiment, the first HARQ-ACK carries one bit.

As an embodiment, the second HARQ-ACK carries one bit.

As an embodiment, the first HARQ-ACK carries a plurality of bits.

As an embodiment, the second HARQ-ACK carries a plurality of bits.

Example 7

Embodiment 7 illustrates a schematic diagram of a first air interface resource block according to an embodiment of the present application; as shown in fig. 7.

As an embodiment, the first air interface resource block includes a positive integer number of REs in a time-frequency domain, where one RE occupies one multicarrier symbol in a time domain and occupies one subcarrier in a frequency domain.

As an embodiment, the first air interface resource block occupies a plurality of multicarrier symbols in a time domain.

As an embodiment, the first air interface resource block includes only 1 multicarrier symbol in time domain.

As an embodiment, the first air interface resource block includes a positive integer number of subcarriers in a frequency domain.

As an embodiment, the first empty Resource block occupies frequency domain resources corresponding to a plurality of RBs (Resource blocks) in a frequency domain.

As an embodiment, the first air interface resource block only occupies frequency domain resources corresponding to 1 RB in a frequency domain.

As an embodiment, the first empty resource block includes a positive integer number of sub-channels (sub-channels) in a frequency domain.

As an embodiment, the first air interface resource block includes a positive integer number of discontinuous multicarrier symbols in a time domain.

As an embodiment, the first air interface resource block includes a positive integer number of consecutive multicarrier symbols in a time domain.

As an embodiment, the first air interface resource block includes a positive integer number of slots in a time domain.

As an embodiment, the first resource block includes a positive integer number of subframes in a time domain.

As an embodiment, the first air-port resource block includes a positive integer number of micro-subframes (Sub-slots) in a time domain.

As an embodiment, the first resource block includes time domain resources and frequency domain resources.

As an embodiment, the first air interface resource block includes time domain resources, frequency domain resources and code domain resources.

As an example, the code domain resource in the present application includes one or more of pseudo-random sequences (pseudo-random sequences), low-peak-to-average power ratio (low-PAPR sequences), cyclic shift values (cyclic shift), OCCs, orthogonal sequences (orthogonal sequences), frequency domain orthogonal sequences and time domain orthogonal sequences.

Example 8

Embodiment 8 illustrates a schematic diagram of K1 candidate air interface resource blocks, as shown in fig. 8. Any candidate air interface resource block in the K1 candidate air interface resource blocks shown in the figure occupies M1 multicarrier symbols in the time domain, and occupies frequency domain resources corresponding to M2 RBs in the frequency domain; the M1 is a positive integer larger than 1, and the M2 is a positive integer.

As an embodiment, when the first sequence is transmitted in a first candidate air interface resource block located in a time domain among the K1 candidate air interface resource blocks, a signal generated by the first sequence only occupies one multicarrier symbol in the first candidate air interface resource block.

As an embodiment, when the first sequence is transmitted in any candidate air interface resource block, which is located outside the first candidate air interface resource block of the time domain, among the K1 candidate air interface resource blocks, a signal generated by the first sequence occupies a plurality of multicarrier symbols in the any candidate air interface resource block.

As an example, said M2 is equal to 1.

As an example, said M2 is equal to 2.

As an embodiment, the M2 is greater than 1, and the M2 RBs are contiguous in the frequency domain.

As an embodiment, the M2 is greater than 1, and the M2 RBs are discrete in the frequency domain.

As an embodiment, the M1 is greater than 1, and the M1 multicarrier symbols are consecutive in the time domain.

As an embodiment, the M1 is greater than 1, and the M1 multicarrier symbols are discrete in the time domain.

Example 9

Embodiment 9 illustrates a schematic diagram of another K1 candidate air interface resource blocks, as shown in fig. 9. A first candidate air interface resource block in the time domain in the K1 candidate air interface resource blocks shown in the figure occupies one multicarrier symbol, and a candidate air interface resource block out of the first candidate air interface resource block in the time domain in the K1 candidate air interface resource blocks occupies multiple multicarrier symbols.

As an embodiment, the number of multicarrier symbols occupied by the candidate air interface resource blocks, which are located outside the first candidate air interface resource block in the time domain, in the K1 candidate air interface resource blocks is related to the positions of the corresponding candidate air interface resource blocks in the K1 candidate air interface resource blocks.

As an embodiment, any candidate air interface resource block of the K1 candidate air interface resource blocks occupies frequency domain resources corresponding to M2 RBs in a frequency domain, where M2 is a positive integer.

As a sub-embodiment of this embodiment, said M2 is equal to 1.

As a sub-embodiment of this embodiment, the M2 is greater than 1, and the M2 RBs are discrete in the frequency domain.

Example 10

Embodiment 10 illustrates a schematic diagram in which a first sequence is transmitted once in the time domain, as shown in fig. 10. In fig. 10, the first sequence is used to generate a first type of signal, where the first type of signal includes P1 modulation symbols, and the P1 modulation symbols are sequentially mapped into P1 REs; the P1 REs occupy P1 subcarriers in a frequency domain and are positioned in a multicarrier symbol in a time domain; and P1 is a positive integer greater than 1.

As an example, said P1 is equal to 12.

As an embodiment, the P1 REs are consecutive in the frequency domain.

Example 11

Embodiment 11 illustrates a schematic diagram in which another first sequence is transmitted once in the time domain, as shown in fig. 11. In fig. 11, the first sequence is used to generate a first type of signal, where the first type of signal includes P1 modulation symbols, and the P1 modulation symbols are repeatedly mapped into (P1 × M2) REs in a frequency domain, where each P1 consecutive REs in the (P1 × M2) REs includes the P1 modulation symbols, respectively; the (P1 × M2) REs are all located within one multicarrier symbol in the time domain; p1 is a positive integer greater than 1, and M2 is a positive integer greater than 1.

As an example, said P1 is equal to 12.

As an example, said M2 is equal to 2.

As an embodiment, the (P1 × M2) REs are consecutive.

As an embodiment, the (P1 × M2) REs are respectively located in frequency domain resources corresponding to the M2 RBs.

As a sub-embodiment of this embodiment, the M2 RBs are consecutive.

As a sub-embodiment of this embodiment, the M2 RBs are discrete.

Example 12

Embodiment 12 illustrates a schematic diagram in which a first sequence is repeatedly transmitted in the time domain, as shown in fig. 12. In fig. 12, the first sequence is used to generate a first type of signal, which includes P1 modulation symbols, corresponding to #1 to # P1 in the figure; the P1 modulation symbols are repeatedly mapped in time domain into (P1 × M1) REs, wherein each P1 consecutive REs of the (P1 × M1) REs respectively include the P1 modulation symbols; the (P1 × M1) REs are located in M1 multicarrier symbols in the time domain, respectively; p1 is a positive integer greater than 1, and M1 is a positive integer greater than 1.

As an example, said P1 is equal to 12.

As an example, said M1 is equal to 2.

As a sub-embodiment of this embodiment, the M1 multicarrier symbols are consecutive in the time domain.

As a sub-embodiment of this embodiment, the M1 multicarrier symbols are discrete in the time domain.

Example 13

Embodiment 13 illustrates a schematic diagram in which another first sequence is repeatedly transmitted in the time domain, as shown in fig. 13. In fig. 13, the first sequence is used to generate a first type of signal, which includes P1 modulation symbols, corresponding to #1 to # P1 in the figure; the P1 modulation symbols are repeatedly mapped into M1 multicarrier symbols in a time domain and mapped into frequency domain resources corresponding to M2 RBs in a frequency domain; the first type of signal occupies (P1 × M2) REs; p1 is a positive integer greater than 1, M1 is a positive integer greater than 1; and M2 is a positive integer greater than 1.

As an example, said P1 is equal to 12.

As an example, said M1 is equal to 2.

As an example, said M2 is equal to 2.

As an embodiment, the M1 multicarrier symbols are consecutive in the time domain.

As an embodiment, the M1 multicarrier symbols are discrete in the time domain.

As an embodiment, the M2 RBs are consecutive in the frequency domain.

As an embodiment, the M2 RBs are discrete in the frequency domain.

Example 14

Embodiment 14 illustrates a schematic diagram of K2 candidate air interface resource pools, as shown in fig. 14. In fig. 14, the K2 candidate air interface resource blocks are K2 candidate air interface resource blocks that cannot be used by the first node to transmit the first sequence in the K1 candidate air interface resource block of the present application; and K2 is a positive integer.

As an example, K2 is equal to 1.

As an example, K1 is equal to 2.

As an embodiment, the K2 candidate air interface resource blocks are reserved for transmission of a cellular link.

As an embodiment, the K2 candidate air interface resource blocks are used for transmission of a signal with higher priority than the first signal.

Example 15

Embodiment 15 illustrates a schematic diagram of a first HARQ-ACK and a second HARQ-ACK, as shown in fig. 15. In fig. 15, a first signal is transmitted in a first time unit, a second signal is transmitted in a second time unit, the first time unit and the second time unit are both used to determine a third time unit, and the first HARQ-ACK and the second HARQ-ACK are both determined to be transmitted in the third time unit.

As an embodiment, the time domain resource occupied by the first air interface resource block in the present application belongs to the third time unit.

As one embodiment, the first HARQ-ACK and the second HARQ-ACK are used together to generate a first sequence, the first sequence being transmitted in the third time unit.

Example 16

Embodiment 16 illustrates a block diagram of the structure in a first node, as shown in fig. 16. In fig. 16, a first node 1600 includes a first receiver 1601 and a first transceiver 1602.

A first receiver 1601 to receive a first signal;

a first transceiver 1602, determining a first air interface resource block, and transmitting a first sequence in the first air interface resource block;

in embodiment 16, a first set of blocks of bits is used to generate the first signal, the first sequence being used to indicate whether the first set of blocks of bits was received correctly; the first air interface resource block is one candidate air interface resource block in the K1 candidate air interface resource blocks; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on a sidelink.

For one embodiment, the first transceiver 1602 performs channel monitoring in a first time window; the channel monitoring is used to determine the first air interface resource block from the K1 candidate air interface resource blocks.

As an embodiment, the first receiver 1601 receives target signaling; the target signaling is used to determine that K2 of the K1 candidate air interface resource blocks are used for transmission of a cellular link, or the target signaling is used to determine that K2 of the K1 candidate air interface resource blocks are used for transmission of a given signal, where the priority of the given signal is higher than that of the first signal; the K2 is a positive integer greater than 0 and smaller than the K1, and the first air interface resource block is a candidate air interface resource block other than the K2 candidate air interface resource blocks and in the K1 candidate air interface resource blocks.

For one embodiment, the first receiver 1601 receives a first signaling; the first signaling is physical layer signaling, the first signaling including configuration information of the first signal.

For one embodiment, the first receiver 1601 receives a second signal; the second set of bit blocks is used to generate a second signal, a second HARQ-ACK is used to indicate whether the second set of bit blocks was received correctly, a first HARQ-ACK is used to indicate whether the first set of bit blocks was received correctly; the first empty resource block is reserved for transmitting the second HARQ-ACK; the first HARQ-ACK and the second HARQ-ACK are used together to generate the first sequence.

For one embodiment, the first receiver 1601 receives a second signaling; the second signaling is used to determine the K1 candidate air interface resource blocks.

For one embodiment, the first receiver 1601 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.

For one embodiment, the first transmitter 1602 includes at least the first 6 of the antenna 452, the receiver/transmitter 454, the multi-antenna receive processor 458, the receive processor 456, the multi-antenna transmit processor 457, the transmit processor 468, and the controller/processor 459 of embodiment 4.

Example 17

Embodiment 17 is a block diagram illustrating the structure of a second node, as shown in fig. 17. In fig. 17, a second node 1700 comprises a first transmitter 1701 and a second receiver 1702.

A first transmitter 1701 that transmits a first signal;

the second receiver 1702, detecting the first sequence in K1 candidate air interface resource blocks;

in embodiment 17, a first set of bit blocks is used to generate the first signal, the first sequence being used to indicate whether the first set of bit blocks is received correctly; a first air interface resource block is one of the K1 candidate air interface resource blocks, and the first sequence is sent in the first air interface resource block; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on a sidelink.

As an example, the first transmitter 1701 transmits first signaling; the first signaling is physical layer signaling, the first signaling including configuration information of the first signal.

As an example, the first transmitter 1701 transmits a second signal; the second set of bit blocks is used to generate a second signal, a second HARQ-ACK is used to indicate whether the second set of bit blocks was received correctly, a first HARQ-ACK is used to indicate whether the first set of bit blocks was received correctly; the first empty resource block is reserved for transmitting the second HARQ-ACK; the first HARQ-ACK and the second HARQ-ACK are used together to generate the first sequence.

For one embodiment, the second receiver 1702 receives second signaling; the second signaling is used to determine the K1 candidate air interface resource blocks.

As an example, the first transmitter 1701 transmits first information; the first information is used for determining at least one of a first air interface resource pool or a second air interface resource pool; the first air interface resource pool comprises the first air interface resource block; the second air interface resource pool comprises the second air interface resource set.

For one embodiment, the first transmitter 1701 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 of embodiment 4.

For one embodiment, the second receiver 1702 includes at least the first 4 of the antenna 420, the receiver 418, the multiple antenna receive processor 472, the receive processor 470, and the controller/processor 475 of embodiment 4.

Example 18

Embodiment 18 illustrates a block diagram of the structure in a third node, as shown in fig. 18. In fig. 18, the third node 1800 includes a second transmitter 1801.

A second transmitter 1801, sending a target signaling;

in embodiment 18, the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks are used for transmission of a cellular link, or the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks are used for transmission of a given signal, where a priority of the given signal is higher than that of the first signal; k2 is a positive integer greater than 0 and less than K1; the first air interface resource block is a candidate air interface resource block which is out of the K1 candidate air interface resource blocks and the K2 candidate air interface resource blocks; the receiver of the target signaling comprises a first node, wherein the first node receives the first signal and sends a first sequence in the first air interface resource block; the first sequence is used to indicate whether a first set of bit blocks is correctly received by the first node; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; the first set of bit blocks is used to generate a first signal, the first signal and the first sequence are both transmitted on a sidelink; the K1 is a positive integer greater than 1.

For an embodiment, the second transmitter 1801 sends a second signaling; the second signaling is used to determine the K1 candidate air interface resource blocks.

For one embodiment, the second transmitter 1801 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 of embodiment 4.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in 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 by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. First node and second node in this application include but not limited to cell-phone, panel computer, notebook, network card, low-power consumption equipment, eMTC equipment, NB-IoT equipment, vehicle communication equipment, vehicles, vehicle, RSU, aircraft, unmanned aerial vehicle, wireless communication equipment such as remote control plane. 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 and reception node TRP, a GNSS, a relay satellite, a satellite base station, an over-the-air base station, an RSU, and other wireless communication devices.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A first node configured for wireless communication, comprising:

a first receiver receiving a first signal;

wherein a first set of bit blocks is used to generate the first signal, the first sequence being used to indicate whether the first set of bit blocks was received correctly; the first air interface resource block is one candidate air interface resource block in the K1 candidate air interface resource blocks; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on a sidelink; when the first empty resource block is the earliest candidate empty resource block in the time domain among the K1 candidate empty resource blocks, the first sequence is sent in the first empty resource block in the time domain for a single time; when the first air interface resource block is a candidate air interface resource block other than the earliest candidate air interface resource block in the time domain among the K1 candidate air interface resource blocks, the first sequence is repeatedly transmitted in the time domain in the first air interface resource block.

2. The first node of claim 1, wherein the first transceiver performs channel monitoring in a first time window; the channel monitoring is used to determine the first air interface resource block from the K1 candidate air interface resource blocks.

3. The first node according to any of claims 1 or 2, wherein the first receiver receives target signaling; the target signaling is used to determine that K2 of the K1 candidate air interface resource blocks are used for transmission of a cellular link, or the target signaling is used to determine that K2 of the K1 candidate air interface resource blocks are used for transmission of a given signal, where the given signal has a higher priority than the first signal; the K2 is a positive integer greater than 0 and smaller than the K1, and the first air interface resource block is a candidate air interface resource block other than the K2 candidate air interface resource blocks and in the K1 candidate air interface resource blocks.

4. The first node according to claim 1 or 2, characterized in that the first receiver receives first signaling; the first signaling is physical layer signaling, the first signaling including configuration information of the first signal.

5. The first node of claim 3, wherein the first receiver receives first signaling; the first signaling is physical layer signaling, the first signaling including configuration information of the first signal.

6. The first node of claim 1 or 2, wherein the first receiver receives a second signal; the second set of bit blocks is used to generate a second signal, a second HARQ-ACK is used to indicate whether the second set of bit blocks was received correctly, a first HARQ-ACK is used to indicate whether the first set of bit blocks was received correctly; the first air interface resource block is reserved for transmitting the second HARQ-ACK; the first HARQ-ACK and the second HARQ-ACK are used together to generate the first sequence.

7. The first node according to claim 1 or 2, characterized in that the first receiver receives second signaling; the second signaling is used to determine the K1 candidate air interface resource blocks.

8. A second node for wireless communication, comprising:

a first transmitter that transmits a first signal;

wherein a first set of bit blocks is used to generate the first signal, the first sequence being used to indicate whether the first set of bit blocks was received correctly; a first air interface resource block is one of the K1 candidate air interface resource blocks, and the first sequence is sent in the first air interface resource block; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted on a sidelink; when the first empty resource block is the earliest candidate empty resource block in the time domain among the K1 candidate empty resource blocks, the first sequence is sent in the first empty resource block in the time domain for a single time; when the first air interface resource block is a candidate air interface resource block other than the earliest candidate air interface resource block in the time domain among the K1 candidate air interface resource blocks, the first sequence is repeatedly transmitted in the time domain in the first air interface resource block.

9. The second node of claim 8, wherein the first transmitter transmits first signaling; the first signaling is physical layer signaling, the first signaling including configuration information of the first signal.

10. Second node according to claim 8 or 9, characterized in that the first transmitter transmits a second signal; the second set of bit blocks is used to generate a second signal, a second HARQ-ACK is used to indicate whether the second set of bit blocks was received correctly, a first HARQ-ACK is used to indicate whether the first set of bit blocks was received correctly; the first empty resource block is reserved for transmitting the second HARQ-ACK; the first HARQ-ACK and the second HARQ-ACK are used together to generate the first sequence.

11. The second node according to claim 8 or 9, characterized in that the second receiver receives second signaling; the second signaling is used to determine the K1 candidate air interface resource blocks.

12. The second node of claim 10, wherein the second receiver receives second signaling; the second signaling is used to determine the K1 candidate air interface resource blocks.

13. A method in a first node used for wireless communication, comprising:

receiving a first signal;

wherein a first set of bit blocks is used to generate the first signal, the first sequence being used to indicate whether the first set of bit blocks was received correctly; the first air interface resource block is one candidate air interface resource block in the K1 candidate air interface resource blocks; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted over a sidelink; when the first empty resource block is the earliest candidate empty resource block in the time domain among the K1 candidate empty resource blocks, the first sequence is sent in the first empty resource block in the time domain for a single time; when the first air interface resource block is a candidate air interface resource block other than the earliest candidate air interface resource block in the time domain among the K1 candidate air interface resource blocks, the first sequence is repeatedly transmitted in the time domain in the first air interface resource block.

14. A method in a first node according to claim 13, comprising:

performing channel monitoring in a first time window;

15. A method in a first node according to claim 13 or 14, comprising:

receiving a target signaling;

wherein the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks are used for transmission of a cellular link, or the target signaling is used to determine that K2 candidate air interface resource blocks of the K1 candidate air interface resource blocks are used for transmission of a given signal, where the priority of the given signal is higher than that of the first signal; the K2 is a positive integer greater than 0 and smaller than the K1, and the first air interface resource block is a candidate air interface resource block other than the K2 candidate air interface resource blocks and in the K1 candidate air interface resource blocks.

16. A method in a first node according to claim 13 or 14, comprising:

receiving a first signaling;

17. A method in a first node according to claim 15, comprising:

receiving a first signaling;

18. A method in a first node according to claim 13 or 14, comprising:

receiving a second signal;

19. A method in a first node according to claim 13 or 14, comprising:

receiving a second signaling;

20. A method in a second node used for wireless communication, comprising:

transmitting a first signal;

detecting a first sequence in K1 candidate air interface resource blocks;

wherein a first set of bit blocks is used to generate the first signal, the first sequence being used to indicate whether the first set of bit blocks was received correctly; a first air interface resource block is one of the K1 candidate air interface resource blocks, and the first sequence is sent in the first air interface resource block; the repeated transmission times of the first sequence in the time domain are related to the position of the first air interface resource block in the K1 candidate air interface resource blocks; k1 is a positive integer greater than 1; the first signal and the first sequence are both transmitted over a sidelink; when the first empty resource block is the earliest candidate empty resource block in the time domain among the K1 candidate empty resource blocks, the first sequence is sent in the first empty resource block in the time domain for a single time; when the first air interface resource block is a candidate air interface resource block other than the earliest candidate air interface resource block in the time domain among the K1 candidate air interface resource blocks, the first sequence is repeatedly transmitted in the time domain in the first air interface resource block.

21. A method in a second node according to claim 20, comprising:

sending a first signaling;

22. A method in a second node according to claim 20 or 21, comprising:

transmitting a second signal;

23. A method in a second node according to claim 20 or 21, comprising:

receiving a second signaling;

24. A method in a second node according to claim 22, comprising:

receiving a second signaling;