CN117750521A - Side-link feedback method and communication device - Google Patents

Abstract

The application provides a side-link feedback method and a communication device, wherein the method comprises the following steps: the first communication device receives a first physical side uplink shared channel PSSCH from the second communication device on a first resource; the first communication device determining one or more physical side uplink feedback channel, PSFCH, resources from the first resource, wherein each PSFCH resource comprises an orthogonal sequence, an interleaved resource block, and a cyclic shift pair; the first communication device sends a first PSFCH at a first PSFCH resource for feeding back whether the first communication device successfully demodulates the first PSSCH, wherein the first PSFCH resource belongs to the one or more PSFCH resources, and the first PSFCH resource comprises a first orthogonal sequence, a first staggered resource block and a first cyclic shift pair. By increasing the number of resources used to transmit the physical side-uplink feedback channel, the present application can meet the need of the receiving end to perform side-uplink feedback to the transmitting end.

Description

Side-link feedback method and communication device

The present application claims priority from the national intellectual property agency, application number 202211140210.1, application name "a feedback channel resource extension method and communication device", filed on 9/20 of 2022, the entire contents of which are incorporated herein by reference.

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a side uplink feedback method and a communications device.

Background

Side Link (SL) communications support direct transmission between terminal devices. Currently, the third generation partnership project (3 ^rd generation partnership project,3 GPP) is discussing extending SL communication over unlicensed spectrum with larger bandwidth in R18, i.e., SL-unlicensed spectrum (SL-U) communication, in order to support transmission of higher rate traffic, such as Virtual Reality (VR) traffic, etc.

On unlicensed bands, SL-U communications need to meet at least two regulatory requirements: channel-listen-talk (LBT) and 80% channel occupancy (occupied channel bandwidth, OCB). For the latter, the concept of interleaved resource blocks (interlace resource block, IRB) is currently introduced, which as a form of frequency domain resource occupation can meet the OCB requirement of 80%.

However, in the SL feedback mechanism, if one physical side uplink feedback channel (physicalsidelinkfeedback channel, PSFCH) occupies one IRB in the frequency domain, the number of PSFCH resources is insufficient, which cannot meet the requirement of SL feedback from the receiving end to the transmitting end under the unlicensed spectrum.

Disclosure of Invention

The application provides a side uplink feedback method and a communication device, which can meet the requirement of SL feedback from a receiving end to a transmitting end on an unlicensed spectrum by increasing the quantity of resources used for transmitting PSFCH.

It should be appreciated that on unlicensed spectrum, there are other communication devices/terminals that communicate using other technologies, such as WIFI, in addition to the communication devices/terminals that communicate using SL-U technology. In the present application, unless otherwise specified, a communication apparatus/terminal refers to a communication apparatus/terminal that communicates using SL-U technology.

In a first aspect, a side-link feedback method is provided, including: the first communication device receives a first physical side uplink shared channel PSSCH from the second communication device on a first resource; the first communication device determining one or more PSFCH resources from the first resource, wherein each PSFCH resource comprises an orthogonal sequence, an IRB, and a cyclic shift pair (cyclic shift pair, CS pair); the first communication device sends a first PSFCH to the second communication device at a first PSFCH resource, the first PSFCH is used for feeding back whether the first communication device successfully demodulates the first PSSCH, the first PSFCH resource belongs to one or more PSFCH resources, and the first PSFCH resource comprises a first orthogonal sequence, a first IRB and a first CS pair.

Specifically, in SL-U, PSFCH is sent on an IRB to meet OCB requirements. The present application block spreads the PSFCH that would otherwise occupy one PRB through orthogonal sequences, thereby transmitting the PSFCH over multiple PRBs in one IRB. In the above manner, the present application supports the dimension that PSFCH resources increase orthogonal sequences, so that the number of PSFCH resources can be increased.

By introducing the orthogonal sequence, the resources of the PSFCH are expanded from two dimensions { IRB, CS pair } to three dimensions { IRB, CS pair, orthogonal sequence }, so that the number of resources for transmitting the PSFCH can be increased, and the requirement of the receiving end for side-link feedback of the transmitting end under the unlicensed spectrum can be met.

With reference to the first aspect, in certain implementations of the first aspect, the first communication device determining one or more PSFCH resources from the first resource includes: the first communication device determines one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resources and at least one resource corresponding to part or all of the one or more minimum time-frequency units; at least one resource is allocated for each minimum time-frequency unit for transmitting the PSSCH; each of the at least one resource includes any one of: { orthogonal sequence, IRB }, { orthogonal sequence, CS pair }, or, { orthogonal sequence, IRB, CS pair }.

Specifically, the support system configures/pre-configures one or more resources for each minimum time-frequency unit according to the resource pool, namely, establishes a mapping relation between the minimum time-frequency unit and at least one resource, and the first communication device can determine the PSFCH resource corresponding to the first PSSCH according to the mapping relation and the minimum time-frequency unit occupied by the first resource. In this way, other communication devices can be prevented from selecting the same PSFCH resource for FSFCH feedback, so that resource collision between different communication devices can be avoided. In addition, according to the mapping relation, the sending end of the PSSCH can also know where to receive the PSFCH, so that the overhead of detecting the PSFCH is reduced.

It should be understood that the determining, by the first communication device, one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource and at least one resource corresponding to some or all of the one or more minimum time-frequency units includes: the first communication device determines one or more PSFCH resources according to at least one resource corresponding to a minimum time-frequency unit with a lowest/highest frequency position in one or more minimum time-frequency units, or according to at least one resource corresponding to all minimum time-frequency units in the one or more minimum time-frequency units.

With reference to the first aspect, in certain implementations of the first aspect, each resource includes { orthogonal sequence, IRB }, the first communication device determining one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource, including: the first communication device determines one or more PSFCH resources according to one or more minimum time-frequency units, at least one resource corresponding to part or all of the one or more minimum time-frequency units, and at least one CS pair.

Specifically, the support system configures one or more resources in the form of { orthogonal sequences, IRBs } for each minimum time-frequency unit, and after the first communication device determines one or more resources according to the minimum time-frequency unit occupied by the first resource, the first communication device may further determine one or more PSFCH resources for transmitting the PSFCH in combination with at least one CS pair. Accordingly, the first communication device selects one PSFCH resource from the one or more PSFCH resources to transmit the first PSFCH.

With reference to the first aspect, in certain implementations of the first aspect, each resource includes { CS pair, orthogonal sequence }, the first communication device determining one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource, including: the first communication device determines one or more PSFCH resources according to one or more minimum time-frequency units, at least one resource corresponding to part or all of the one or more minimum time-frequency units, and at least one IRB.

Specifically, the support system configures one or more resources in the form of { CS pair, orthogonal sequence } for each minimum time-frequency unit, and after the first communication device determines one or more resources according to the minimum time-frequency unit occupied by the first resource, the first communication device may further determine one or more PSFCH resources for transmitting the PSFCH in conjunction with at least one IRB. Accordingly, the first communication device selects one PSFCH resource from the one or more PSFCH resources to transmit the first PSFCH.

With reference to the first aspect, in certain implementation manners of the first aspect, the at least one IRB is determined by the first communication device according to a frequency domain position of some or all of one or more minimum time-frequency units.

With reference to the first aspect, in certain implementations of the first aspect, the at least one resource is allocated for each minimum time-frequency unit used for transmitting the PSSCH, including: the at least one resource is allocated according to a time domain location and/or a frequency domain location of each minimum time-frequency unit.

With reference to the first aspect, in certain implementations of the first aspect, the time domain position and/or the frequency domain position includes a first index and/or a second index, wherein the first index indicates a time domain position of each minimum time-frequency unit and the second index indicates a frequency domain position of each minimum time-frequency unit.

In one possible scenario, when the minimum time-frequency unit occupies a time slot in the time domain, then the first index indicates that the time slot is at a transmission opportunity associated with the same PSFCHThe time-domain position in the time slot, i.e. the range of values of the first index, is +.>

In one possible case, when the minimum time-frequency unit occupies one IRB in the frequency domain, the value range of the second index is 0-N _interlace -1, wherein N _interlace Is the number of IRBs in the resource pool.

In another possible case, the minimum time-frequency unit occupies k IRBs (k>1) The value range of the second index is 0 to (N) _interlace /k)-1。

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the first communication device transmitting a redundancy signal on the second PSFCH resource; wherein the second PSFCH resource comprises a second orthogonal sequence, a second IRB, and a second CS pair, the second PSFCH resource being orthogonal to each of the at least one resource.

In some possible cases, the first communication device does not transmit the PSFCH on a transmission occasion of the PSFCH corresponding to the received PSSCH. For example, the second order side-link control information (sidelink control information, SCI) associated with the PSSCH indicates that the first communication device is not transmitting hybrid automatic repeat request (hybrid automatic repeat request, HARQ) feedback (HARQ feedback disabled), or indicates that the first communication device is transmitting only NACKs and is not transmitting ACKs, and the state that the first communication device demodulates the PSSCH is ACK. At this time, since the first communication apparatus does not transmit the PSFCH at the transmission timing of the PSFCH, the time-frequency resource corresponding to the transmission timing may be occupied by the communication apparatus adopting other technologies, such as occupied by the communication apparatus adopting WIFI, which may affect the transmission of the subsequent SL-U communication apparatus. By the technical scheme, the time-frequency resource corresponding to the transmission time of the PSFCH can be prevented from being occupied by other communication devices.

To prevent the redundant transmission from interfering with the PSFCH feedback carrying HARQ information, the resources used by the redundant transmission are kept in an orthogonal relationship with at least one resource allocated for each minimum time-frequency unit. Specifically, the PSFCH resource used for the redundant transmission includes three dimensions, i.e., IRB, CS pair, and orthogonal sequence, so that the resource of any one dimension of the PSFCH resource for the redundant transmission may be different from the resource of the corresponding dimension in at least one resource allocated for each minimum time-frequency unit, for example, the IRB used is different, or the CS pair is different, or the orthogonal sequence is different.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the first communication device determines a first PSFCH resource from one or more PSFCH resources according to the identification information corresponding to the first PSSCH.

In this way, the first communication device is supported to determine the first PSFCH resource according to the identification information corresponding to the first PSSCH, so that the first communication device can send the corresponding PSFCH through the appropriate PSFCH resource.

With reference to the first aspect, in certain implementations of the first aspect, the identification information includes an identification of the second communication device, which is carried in the side-uplink control information associated with the first PSSCH.

More specifically, the identifier of the second communication device is carried in the second-level SCI associated with the first PSSCH, and the identifier is the Source identifier (Source ID). At this time, the source identification may be considered to correspond to the first PSSCH.

With reference to the first aspect, in certain implementations of the first aspect, the identification information further includes an intra-group identification of the first communication device.

In some possible cases, the second-order SCI associated with the first PSSCH may indicate that the determination of the first PSFCH resource also requires an intra-group identification of the first communication device. The intra-group identifier is configured by an application layer (application layer), and the configuration information may be carried in the first PSSCH, or may be carried in another PSSCH transmitted by the second communication device to the first communication device. At this time, both the source identity and the intra-group identity can be considered to correspond to the first PSSCH.

In a second aspect, there is provided a communication apparatus comprising: a transceiving unit for receiving a first PSSCH from a second communication device at a first resource; a processing unit configured to determine one or more PSFCH resources from the first resource, wherein each PSFCH resource comprises an orthogonal sequence, an IRB, and a CS pair; the transceiver unit is further configured to send a first PSFCH to the second communication device at a first PSFCH resource, where the first PSFCH is used to feed back whether the first communication device successfully demodulates the first PSSCH, the first PSFCH resource belongs to one or more PSFCH resources, and the first PSFCH resource includes a first orthogonal sequence, a first IRB, and a first CS pair.

With reference to the second aspect, in some implementations of the second aspect, the processing unit is further configured to determine one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource and at least one resource corresponding to some or all of the one or more minimum time-frequency units; at least one resource is allocated for each minimum time-frequency unit for transmitting the PSSCH; each of the at least one resource includes any one of: { orthogonal sequence, IRB }, { orthogonal sequence, CS pair }, or, { orthogonal sequence, IRB, CS pair }.

With reference to the second aspect, in some implementations of the second aspect, each resource includes { an orthogonal sequence, IRB }, and the processing unit is further configured to determine one or more PSFCH resources according to one or more minimum time-frequency units, at least one resource corresponding to a part or all of the one or more minimum time-frequency units, and at least one CS pair.

With reference to the second aspect, in some implementations of the second aspect, each resource includes { CS pair, orthogonal sequence }, and the processing unit is further configured to determine one or more PSFCH resources according to one or more minimum time-frequency units, at least one resource corresponding to some or all of the one or more minimum time-frequency units, and at least one IRB.

With reference to the second aspect, in certain implementations of the second aspect, the at least one IRB is determined by the processing unit from a frequency domain location of some or all of the one or more minimum time-frequency units.

With reference to the second aspect, in some implementations of the second aspect, at least one resource is allocated for each minimum time-frequency unit used for transmitting the PSSCH, including: at least one resource is allocated according to the time-frequency location and/or the frequency-domain location of each minimum time-frequency unit.

With reference to the second aspect, in some implementations of the second aspect, the time-frequency location and/or the frequency-domain location includes a first index indicating the time-domain location of each minimum time-frequency unit and a second index indicating the frequency-domain location of each minimum time-frequency unit.

With reference to the second aspect, in certain implementations of the second aspect, the transceiver unit is further configured to send a redundancy signal on a second PSFCH resource; the second PSFCH resource includes a second orthogonal sequence, a second IRB, and a second CS pair, the second PSFCH resource being orthogonal to each of the at least one resource.

With reference to the second aspect, in some implementations of the second aspect, the processing unit is further configured to determine a first PSFCH resource from one or more PSFCH resources according to the identification information corresponding to the first PSSCH.

With reference to the second aspect, in certain implementations of the second aspect, the identification information includes an identification of a second communication device, the identification of the second communication device being carried in the side-uplink control information associated with the first PSSCH.

With reference to the second aspect, in certain implementations of the second aspect, the identification information further includes an intra-group identification of the communication device.

In a third aspect, a communications apparatus is provided, comprising a processor configured to cause the communications apparatus to perform the method of any one of the first aspect and any one of the possible implementations of the first aspect by executing a computer program or instructions, or by logic circuitry.

With reference to the third aspect, in certain implementations of the third aspect, the communication apparatus further includes a memory for storing the computer program or instructions.

With reference to the third aspect, in certain implementations of the third aspect, the communication device further includes a communication interface for inputting and/or outputting signals.

In a fourth aspect, a communication device is provided, comprising logic circuitry for performing the method of the first aspect and any one of the possible implementations of the first aspect, and an input-output interface for inputting and/or outputting signals.

In a fifth aspect, a computer readable storage medium is provided, comprising a computer program or instructions which, when run on a computer, cause the method of any one of the first aspect and any one of the possible implementations of the first aspect to be performed.

In a sixth aspect, a computer program product is provided, comprising instructions which, when run on a computer, cause the method of any one of the first aspect and any one of the possible implementations of the first aspect to be performed.

In a seventh aspect, a computer program is provided which, when run on a computer, causes the method of any one of the first aspect and any one of the possible implementations of the first aspect to be performed.

Drawings

Fig. 1 is a schematic diagram of a suitable communication system 100 in accordance with an embodiment of the present application.

Fig. 2 is a schematic diagram of the configuration of frequency domain resources of IRBs.

Fig. 3 is a schematic diagram of a configuration of transmission occasions of the PSFCH.

Fig. 4 is a schematic diagram of an interaction flow of a side-link feedback method according to an embodiment of the present application.

Fig. 5 is a schematic diagram of block spreading processing of PSFCH by orthogonal sequences according to an embodiment of the present application.

Fig. 6 is a schematic block diagram of a communication device 600 of an embodiment of the present application.

Fig. 7 is a schematic block diagram of a communication device 700 of an embodiment of the present application.

Fig. 8 is a schematic block diagram of a communication device 800 of an embodiment of the present application.

Fig. 9 is a schematic block diagram of a communication device 900 of an embodiment of the present application.

Fig. 10 is a schematic block diagram of a communication apparatus 1000 of an embodiment of the present application.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunication system, UMTS), fifth generation (5) ^th generation, 5G) systems or New Radio (NR), sixth generation (6 ^th generation, 6G) system, etc., a 5G later evolution system, an inter-satellite communication, etc., non-terrestrial communication network (NTN) system, etc. The satellite communication system comprises a satellite base station and a terminal device. The satellite base station provides communication services for the terminal device. The satellite base station may also communicate with a terrestrial base station. The satellite may be used as a base station or as a terminal device. Wherein the satellite may be Refers to unmanned aerial vehicles, hot air balloons, low-orbit satellites, medium-orbit satellites, high-orbit satellites and other non-ground base stations or non-ground equipment.

The technical scheme of the embodiment of the application is applicable to the scenes of the isomorphic network and the heterogeneous network, is unlimited to transmission points, can be multipoint cooperative transmission between macro base stations and macro base stations, between micro base stations and between macro base stations and micro base stations, and is applicable to FDD/TDD systems. The technical scheme of the embodiment of the application is not only suitable for low-frequency scenes (sub 6G), but also suitable for high-frequency scenes (more than 6 GHz), terahertz, optical communication and the like. The technical scheme of the embodiment of the application not only can be suitable for communication between the network equipment and the terminal, but also can be suitable for communication between the network equipment and the terminal, communication between the terminal and the terminal, communication between the Internet of vehicles, the Internet of things, the industrial Internet and the like.

The technical solution of the embodiment of the present application may also be applied to a scenario where a terminal is connected to a single base station, where the base station to which the terminal is connected and a Core Network (CN) to which the base station is connected are the same standard. For example, CN is 5G Core, the base station is corresponding to 5G base station, and the 5G base station is directly connected with 5G Core; or CN is 6G Core, the base station is 6G base station, and the 6G base station is directly connected with the 6G Core. The technical solution of the embodiment of the application may also be applied to a dual connectivity (dual connectivity, DC) scenario where a terminal is connected with at least two base stations.

The technical solution of the embodiment of the present application may also use macro-micro scenarios composed of base stations in different forms in the communication network, for example, the base stations may be satellites, air balloon stations, unmanned aerial vehicle stations, etc. The technical scheme of the embodiment of the application is also suitable for the scene that the wide coverage base station and the small coverage base station exist at the same time.

The technical solution of the embodiment of the application may also be applied to wireless communication systems of 5.5G, 6G and later, and applicable scenarios include but are not limited to terrestrial cellular communication, NTN, satellite communication, high altitude communication platform (high altitude platform station, HAPS) communication, vehicle-to-evaluation (V2X), access backhaul integration (integrated access and backhaul, IAB), reconfigurable intelligent surface (reconfigurable intelligent surface, RIS) communication, indoor business, and other scenarios.

The technical scheme of the embodiment of the application can also be applied to SL communication of direct communication between terminal equipment, namely, the shared channel and the feedback channel are transmitted and received between the terminal equipment.

It should be appreciated that the technical solution of the embodiment of the present application may also be suitable for indoor commercial scenarios, such as, for example, high-definition screen projection from a mobile phone to a large screen, VR video transmission from a mobile phone to VR glasses, and so on.

The terminal in the embodiment of the present application may be a device with a wireless transceiver function, and specifically may refer to a User Equipment (UE), an access terminal, a subscriber unit (subscriber unit), a subscriber station, a mobile station (mobile station), a remote station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device may also be a satellite phone, a cellular phone, a smart phone, a wireless data card, a wireless modem, a machine type communication device, a terminal that may be a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a customer terminal device (customer-premises equipment, CPE), a point of sale (POS) machine, a handheld device with wireless communication functionality, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a communication device onboard an aerial plane, a wearable device, an unmanned aerial vehicle, a robot, a device to a terminal in a device communication (D2D), a terminal in V2X, a Virtual Reality (VR) terminal device, an enhanced reality (augmented reality, AR) terminal device, a wireless terminal in an industrial control (industrial control), a wireless terminal in a wireless driver of a remote (remote) device, a smart terminal in a smart network (smart terminal in a smart communication system, a smart terminal in a smart communication system (smart mobile application) or a mobile communication system (smart terminal in a smart network of the present application, a smart device in a smart communication system (smart system of a mobile application) or the like.

The device for implementing the function of the terminal device in the embodiment of the present application may be the terminal device; or a device, such as a chip system, capable of supporting the terminal device to implement the function. The device can be installed in or matched with the terminal equipment. In the embodiment of the application, the chip system may be formed by a chip, and may also include a chip and other discrete devices.

The network device in the embodiment of the application has a wireless receiving and transmitting function and is used for communicating with the terminal device. The access network device may be a node in a radio access network (radio access network, RAN), also referred to as a base station, also referred to as a RAN node. An evolved Node B (eNB or eNodeB) in LTE; or a base station in a 5G network such as a gndeb (gNB) or a base station in a public land mobile network (public land mobile network, PLMN) that evolves after 5G, a broadband network traffic gateway (broadband network gateway, BNG), a convergence switch or a 3GPP access device, etc.

The network device in the embodiment of the present application may further include various forms of base stations, for example: macro base stations, micro base stations (also referred to as small stations), relay stations, transmission points (transmitting and receiving point, TRP), transmission points (transmitting point, TP), mobile switching centers (mobile switching centers, D2D), devices that assume base station functions in vehicle-to-device (V2X), machine-to-machine (M2M) communications, and the like, and may also include Centralized Units (CUs) and Distributed Units (DUs) in a cloud access network (cloud radio access network, C-RAN) system, network devices in an NTN communication system, and the embodiments of the present application are not particularly limited.

The means for implementing the function of the network device in the embodiment of the present application may be the network device, or may be a means capable of supporting the network device to implement the function, for example, a chip system. The apparatus may be installed in or used in cooperation with a network device. The chip system in the embodiment of the application can be composed of chips, and can also comprise chips and other discrete devices.

Fig. 1 is a schematic diagram of a suitable communication system 100 in accordance with an embodiment of the present application. As shown in fig. 1, communication system 100 includes a network device 110, a terminal device 120, and a terminal device 130. The number of terminal devices and network devices included in the communication system 100 is not limited in the embodiments of the present application.

It should be understood that fig. 1 is only exemplary and is not intended to limit the scope of protection claimed in this application. Terminal device 120 and terminal device 130 may be any of the terminal devices listed above, and network device 110 may be any of the network devices listed above.

In the communication system 100, communication between the terminal device 120 and the terminal device 130 can be performed through a PC5 interface, that is: SL communication is performed between terminal device 120 and terminal device 130. Communication between terminal device 120 or terminal device 130 and network device 110 may also be via an air interface (Uu).

Some terms related to the technical solutions disclosed in the present application will be briefly described below.

First, SL-U.

As previously stated, SL-U communications are required to meet at least two regulatory requirements: LBT and 80% OCB.

1)LBT：

Specifically, LBT is divided into two classes: type 1-LBT and type 2-LBT. Among these, type 1-LBT requires counter backoff (i.e., performing channel listening multiple times), which is typically long. The type 2-LBT only requires a fixed time of interception of the channel, which is typically short. Since the time of channel interception of the type 2-LBT is short, the probability that the terminal device accesses the channel through the type 2-LBT is high.

When the terminal equipment needs to transmit signals, it needs to perform channel interception on one or more 20MHz channels corresponding to the frequency domain resources occupied by the transmitted signals. Wherein, the granularity of the channel monitored by the terminal equipment is 20MHz.

2) OCB requirement:

the terminal device needs to meet at least 80% of OCB requirements when transmitting data on the unlicensed spectrum, i.e. the terminal device needs to ensure that its own data transmission can occupy at least 80% of the bandwidth on the corresponding 20MHz channel or channels. To meet this OCB requirement, the IRB concept is currently introduced, which can be seen in fig. 2 as a form of frequency domain resource occupation.

Fig. 2 is a schematic diagram of the configuration of frequency domain resources of IRBs. As shown in fig. 2, a channel of a certain bandwidth includes a plurality of IRBs. Wherein one IRB includes a plurality of PRBs. Illustratively, when the subcarrier spacing (subcarrier spacing, SCS) is equal to 15KHz, the 20MHz channel comprises 10 IRBs, one IRB comprising 10 or 11 PRBs; when SCS is equal to 30KHz, the 20MHz channel includes 5 IRBs, and one IRB includes 10 or 11 PRBs. In fig. 2, 10 slash textured PRBs constitute one IRB (only an example). In other words, IRBs indicate that the frequency domain resources occupied by the signaling exhibit a comb-like structure, i.e. one PRB out of every several PRBs belongs to an IRB. In this way, the slash textured PRBs can span the entire channel of 20MHz, and can meet the requirement of at least 80% OCB.

Second, PSFCH.

The PSFCH feedback mechanism of the R16 version is configured/preconfigured for the resource pool. Specifically, the transmission timing (occalation) of the PSFCH is periodically configured on the resource pool, and the Period may be one value (in time slot) of {0,1,2,4} and is configured by RRC signaling sl-PSFCH-Period-r 1. When the configured period is 0, HARQ feedback is not supported on behalf of the resource pool. Thus, the present application is directed to the case where the configuration period is 1 or 2 or 4.

One of the resource pools includes time domain resources and frequency domain resources used for transmitting the PSSCH. The minimum time-frequency unit for transmitting the PSSCH in the resource pool specified by the R16 standard occupies one slot (slot) in the time domain and one subchannel (sub-channel) in the frequency domain. The PSSCH may occupy one or more of the minimum time-frequency units described above. For each slot in the resource pool, the transmission occasion of its associated PSFCH is located on the transmission occasion of the closest PSFCH that is several slots after the slot (configured by RRC signaling sl-MinTimeGapPSFCH-r 16).

On each PSFCH transmission occasion, the PSFCH resources include PRBs and CS pairs, one PSFCH occupies one PRB on the frequency domain, and the first communication device will transmit one CS of the base sequence on the PRB. Wherein the CS employed by the first communication device belongs to a CS pair. It should be appreciated that different CS pairs can be used for multi-user multiplexing. In addition, two CSs in the CS pair are used to indicate ACK and NACK, respectively; alternatively, one CS of the CS pair is used to indicate NACK, and the other CS is not used, which is not limited in this application.

It should be appreciated that the available PRBs, base sequences, and CS pair for transmitting the PSFCH are configured/pre-configured for a resource pool with only one base sequence on one resource pool and the base sequence has a sequence length of 12.

Fig. 3 is a schematic diagram of a configuration of transmission occasions of the PSFCH. As shown in fig. 3, the configuration period of the transmission opportunity of the PSFCH is four slots. Where the transmission opportunity of the PSFCH is located in slot 2, the transmission opportunity includes an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol (hereinafter referred to as symbol a) for transmitting the PSFCH. At this time, there are 4 total transmission occasions of PSFCH associated with symbol a (e.g., symbol a in slot 6 is associated with slots 1-4 as described above), i.e., the receiving end needs to feed back all possible physical side uplink shared channels (physical sidelink shared channel, PSSCH) on four slots on symbol a.

In SL-U, to meet the OCB requirement, the smallest time-frequency unit in the resource pool that transmits the PSSCH may occupy one or more IRBs in the frequency domain. In addition, the PSFCH is likely to transmit on one IRB. Thus, for each transmission opportunity of the PSFCH, the resources used to transmit the PSFCH include IRBs and CS pairs. At this time, the amount of resources used for transmitting the PSFCH is insufficient, and may not meet the feedback requirement from the receiving end to the transmitting end under the unlicensed spectrum.

Consider, for example, a unicast scenario. In the resource pool, the minimum time-frequency unit for transmitting PSSCH occupies one IRB in the frequency domain and one time slot in the time domain. The frequency domain resource in the resource pool comprises N IRBs, 3 CS pairs are configured, and the configuration period of the symbol A is 4 time slots. Assuming that a different PSSCH is transmitted on each minimum time-frequency unit over these 4 slots, 4*N PSFCH resources need to be included on symbol a to be able to distinguish between the different PSSCHs. However, the symbol a only includes 3*N resources, which cannot meet the feedback requirement from the receiving end to the transmitting end.

In another example, considering a multicast scenario, for example, the smallest time-frequency unit in the resource pool is the same as the above example, and it is assumed that a different PSSCH is transmitted on each smallest time-frequency unit, and considering that each PSSCH is transmitted to at least two receiving ends, at least two receiving ends need to feed back the same PSSCH. Assume that the frequency domain resource of one resource pool includes N IRBs, and 6 CS pairs are configured, and the configuration period of symbol a is 4 slots. At this time, in order to distinguish feedback from different receivers, symbol a needs to include at least 4×2×n=8n resources. However, symbol a can only carry 6*N resources, which cannot meet the feedback requirement from the receiving end to the transmitting end.

Notably, the PSFCH feedback mechanism is configured/preconfigured for the resource pool. Therefore, regardless of how many PSSCHs are transmitted on the resource pool, how many minimum time-frequency units each PSSCH occupies, whether unicast or multicast, there needs to be enough PSFCH resources to feed back. However, for the above two examples, the amount of resources used for transmitting the PSFCH in the existing SL feedback mechanism cannot meet the requirement of the receiving end to feedback to the transmitting end under the unlicensed spectrum. In view of the above technical problems, the present application provides a side uplink feedback method and a communication device, so as to meet the requirement of a receiving end to perform side uplink feedback to a transmitting end under unlicensed spectrum by increasing the number of resources used for transmitting PSFCH.

The side uplink feedback method and the communication device according to the embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 4 is a schematic diagram of an interaction flow of a side-link feedback method 400 according to an embodiment of the present application. The method flow in fig. 4 may be performed by the first communication device and the second communication device, or by a module and/or a device (e.g., a chip or an integrated circuit, etc.) installed in the first communication device and the second communication device and having corresponding functions, which is not limited in this application. The first communication device is a terminal device, and the second communication device is a terminal device. The first communication device and the second communication device are described below as examples. As shown in fig. 4, the method 400 includes:

s410, the second communication device transmits the first PSSCH to the first communication device.

Accordingly, the first communication device receives the first PSSCH from the second communication device on the first resource.

In the embodiment of the present application, the first resource includes one or more minimum time-frequency units. Wherein each minimum time-frequency unit comprises a time domain resource and a frequency domain resource.

Illustratively, the time domain resources in the minimum time-frequency unit comprise one or more time slots and the frequency domain resources in the minimum time-frequency unit comprise one or more IRBs. In other words, the minimum time-frequency unit includes at least one slot and at least one IRB. For convenience of description, the present application describes a scenario in which the minimum time-frequency unit includes one time slot and one IRB, but is not limited to a scenario in which the minimum time-frequency unit includes a plurality of time slots and a plurality of IRBs.

S420, the first communication device determines one or more PSFCH resources according to the first resource, each PSFCH resource including an orthogonal sequence, an IRB, and a CS pair.

Specifically, the first communication device determines one or more PSFCH resources on a transmission occasion of one PSFCH according to the first resource. In other words, one or more of the above-described PSFCH resources are located above the transmission opportunity of one PSFCH.

It should be understood that the first communication apparatus may follow an existing mechanism for determining the transmission opportunity of the PSFCH according to the first resource, which is not limited in this application. The present application mainly addresses how IRBs, CS pairs, and orthogonal sequences used to transmit PSFCHs are determined from received PSSCHs on a given PSFCH transmission occasion.

In one possible implementation, each PSFCH resource includes an orthogonal sequence, an IRB, and a CS pair. Wherein each PSFCH resource may include at least one orthogonal sequence, at least one IRB, and at least one CS pair. For convenience of description, the present application describes an example in which a PSFCH resource includes an orthogonal sequence, an IRB, and a CS pair, but is not limited to other scenarios.

In the embodiment of the application, the first communication device performs block spreading processing on the transmitted PSFCH by using an orthogonal sequence. For example, the first communication device sequentially multiplies the 12-long PSFCH sequence within each PRB by a block spreading factor, which is an element of the orthogonal sequence. See in particular fig. 5. It should be appreciated that IRBs, CS pair, and orthogonal sequences used for feeding back PSFCH are also configured/preconfigured for the resource pool. Wherein the length of the orthogonal sequences (the number of block spreading coefficients within the orthogonal sequences) and the number of orthogonal sequences are also configurable/preconfigured. Wherein the number of orthogonal sequences is less than or equal to the length of the orthogonal sequences.

Fig. 5 is a schematic diagram of block spreading processing of a PSFCH using orthogonal sequences in an embodiment of the present application. As shown in fig. 5 (a), when the length of the orthogonal sequence is equal to the number of PRBs in the IRBs, one IRB includes 10 PRBs, one orthogonal sequence includes 10 block spreading coefficients, and 12 long PSFCH sequences in the PRBs in one IRB are sequentially multiplied by the corresponding block spreading coefficients, that is: sequence a1 in PRB1 within IRB1, sequence a2 in PRB11 within IRB1, sequence a3 in PRB21 within IRB1, sequence a4 in PRB31 within IRB1, sequence a5 in PRB41 within IRB1, sequence a6 in PRB51 within IRB1, sequence a7 in PRB61 within IRB1, sequence a8 in PRB71 within IRB1, sequence a9 in PRB81 within IRB1, and sequence a10 in PRB91 within IRB 1. As shown in fig. 5 (b), when the number of block spreading coefficients in an orthogonal sequence can divide the number of PRBs in an IRB, one IRB includes 10 PRBs and one orthogonal sequence includes 2 block spreading coefficients, it is satisfied that: sequence a1 in PRB1 within IRB1, sequence a2 in PRB11 within IRB1, sequence a1 in PRB21 within IRB1, sequence a2 in PRB31 within IRB1, sequence a1 in PRB41 within IRB1, sequence a2 in PRB51 within IRB1, sequence a1 in PRB61 within IRB1, sequence a2 in PRB71 within IRB1, sequence a1 in PRB81 within IRB1, and sequence a2 in PRB91 within IRB 1. As shown in fig. 5 (c), when the number of block spreading coefficients in an orthogonal sequence cannot divide the number of PRBs in an IRB, one IRB includes 10 PRBs and one orthogonal sequence includes 3 block spreading coefficients, then: sequence a1 in PRB1 in IRB1, sequence a2 in PRB11 in IRB1, sequence a3 in PRB21 in IRB1, sequence a1 in PRB31 in IRB1, sequence a2 in PRB41 in IRB1, sequence a3 in PRB51 in IRB1, sequence a1 in PRB61 in IRB1, sequence a2 in PRB71 in IRB1, sequence a3 in PRB81 in IRB1, and sequence a1 in PRB91 in IRB1 (block spreading processing may not be performed).

In one possible implementation, the present application supports block spreading for a portion of IRBs within one IRB indicated by a resource pool configuration/pre-configuration bit map (bitmap), with the remaining PRBs not being block spread (i.e., the PSFCH sequences in the remaining PRBs need not be multiplied by block spreading coefficients). When performing block spreading processing on a part of PRBs, the PSFCH sequence in each PRB will be sequentially multiplied by the corresponding block spreading coefficient in the orthogonal sequence. At this time, the number of PRBs subjected to block spreading will be an integer multiple of the number of block spreading coefficients in one orthogonal sequence. When detecting the PSFCH, the second communication apparatus detects only the PSFCH sequence in the PRB subjected to block spreading. It should be appreciated that the 12 long PSFCH sequences within a PRB are derived from the base sequence through CS.

One possible implementation, the present application supports a way to instruct the second communication device to detect PSFCH with partial PRBs in IRB for a resource pool configuration/pre-configuration bit map. Wherein, the partial PRB for detecting PSFCH satisfies the following condition: the block spread spectrum coefficients multiplied by the PSFCH sequences in the PRB are taken over all the block spread spectrum coefficients in the orthogonal sequences; and the number of 12-long PSFCH sequences multiplied by any one block spreading factor is the same.

By introducing the orthogonal sequence, the resources of the PSFCH are expanded from two dimensions { IRB, CS pair } to three dimensions { IRB, CS pair, orthogonal sequence }, so that the number of resources for transmitting the PSFCH can be increased, and the requirement of the receiving end for side-link feedback of the transmitting end under the unlicensed spectrum can be met.

It is understood that the commonly used orthogonal sequences are orthogonal cover code (orthogonal covering code, OCC) sequences. Accordingly, the orthogonal sequence in the present application may also be an OCC sequence. In addition, the present application is not limited to a specific form of orthogonal sequence.

It should be appreciated that the orthogonal sequences commonly used in the standard are OCC sequences, which include the common discrete fourier transform (discrete fouriertransformation, DFT) sequences and channel codes (walsh). In the following description of the present application, the present application will be described by taking an orthogonal sequence as a top description as an example, and the specific type of the orthogonal sequence is not limited.

In one possible implementation, the determining, by the first communication device, one or more PSFCH resources according to the first resource includes:

s420a, the first communication device allocates at least one resource S for each minimum time-frequency unit of the scheduling PSSCH;

s420b, the first communication device determines the one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource and at least one resource S corresponding to part or all of the one or more minimum time-frequency units.

Specifically, the minimum time-frequency unit specified in the R16 standard is the minimum granularity (granularity) of the time-frequency resource occupied by the PSSCH. The time-frequency resource for transmitting the PSSCH occupies at least one minimum time-frequency unit, or may occupy a plurality of minimum time-frequency units. In R16, the minimum time-frequency unit occupies one slot in the time domain and one PRB in the frequency domain. In R18, after IRB is introduced, the minimum time-frequency unit may occupy one time slot in the time domain, and may occupy one or more IRBs in the frequency domain, which is not limited in this application. In summary, the specific form of the minimum time-frequency unit is not limited in this application.

The first communication device determines one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource and at least one resource S corresponding to some or all minimum time-frequency units in the one or more minimum time-frequency units, including: the first communication device determines one or more PSFCH resources in accordance with at least one resource S corresponding to a minimum time-frequency unit with a lowest/highest frequency position in the one or more minimum time-frequency units, or in accordance with at least one resource S corresponding to all minimum time-frequency units in the one or more minimum time-frequency units. The present application is not limited in this regard.

The above may be understood that the protocol configures/preconfigures the mapping rule Q (or the mapping relationship Q) between each minimum time-frequency unit and at least one resource S for the resource pool. For example, each minimum time-frequency unit corresponds to at least one resource S by the mapping rule Q. Illustratively, the minimum time-frequency unit a corresponds to at least one resource S through a mapping rule Q; the minimum time frequency unit B corresponds to at least one resource S through a mapping rule Q; the minimum time-frequency unit C corresponds to at least one resource S by the mapping rule Q.

It should be understood that the above-mentioned mapping rule Q is configured/preconfigured for the resource pool by the protocol, and the first communication device in S420a allocates at least one resource S for each minimum time-frequency unit of the scheduling PSSCH according to the configured/preconfigured mapping rule Q.

Alternatively, each minimum time-frequency unit may or may not be used to transmit the PSSCH, which is not limited in this application.

Specifically, the support system configures one or more resources S for each minimum time-frequency unit, that is, establishes a mapping relationship between the minimum time-frequency unit and at least one resource S, and the first communication device can determine a PSFCH resource corresponding to the first PSSCH according to the mapping relationship and the minimum time-frequency unit occupied by the first resource. In this way, other communication devices can be prevented from selecting the same PSFCH resource for FSFCH feedback, so that resource collision between different communication devices can be avoided.

In one possible implementation manner, the resource S includes any one of the following:

{ orthogonal sequence, CS pair, IRB }, { orthogonal sequence, IRB }, or, { orthogonal sequence, CS pair }.

In one possible implementation, the resources S include { orthogonal sequences, IRBs }, and the first communication device in S420a allocates at least one resource S for each minimum time-frequency unit of the scheduled PSSCH, including:

s420a1, the first communication device determines at least one resource S according to the time domain position and the frequency domain position of each minimum time-frequency unit.

Specifically, when the resources S include { orthogonal sequences, IRBs }, the first communication apparatus configures one or more resources S (based on the mapping rule Q) for each minimum time-frequency unit according to the time-domain position and the frequency-domain position of each minimum time-frequency unit.

As described above, a minimum time-frequency unit includes a time domain resource and a frequency domain resource, and this application takes as an example that the minimum time-frequency unit occupies a time slot in the time domain and occupies an IRB in the frequency domain. The present application supports configuring a set of indices { j, k } for each minimum time-frequency unit. Wherein j is used for indicating the time domain position of the minimum time-frequency unit, and k is used for indicating the frequency domain position of the minimum time-frequency unit. In other words, the present application supports the protocol to configure indexes for the minimum time-frequency unit and the resource S, where the index of one minimum time-frequency unit corresponds to the index of one or more resources S. In summary, the mapping rule Q is the mapping relationship between the index of the smallest time-frequency unit and the index of the resource S.

In one possible scenario, the minimum time-frequency unit occupies a time slot in the time domain, and the first index indicates that the time slot is at a transmission opportunity associated with the same PSFCHThe time-domain position in the time slot, i.e. the range of values of the first index, is +.>

In one possible case, the minimum time-frequency unit occupies one IRB in the frequency domain, and the value range of the second index is 0-N _interlace -1, wherein N _interlace Is the number of IRBs in the resource pool.

In another possible case, the minimum time-frequency unit occupies k IRBs (k>1) The value range of the second index is 0 to (N) _interlace /k)-1。

It should be understood that this application will illustrate an example where the minimum time-frequency unit occupies one time slot in the time domain and occupies one IRB in the frequency domain, but is not limited to the specific form of the minimum time-frequency unit.

It is understood that when the resource S includes { orthogonal sequence, IRB }, the resource S is a two-dimensional resource. As shown in table 1, each resource S is configured with a resource index, and the resource index corresponds to the resource S one by one. The resource S includes { orthogonal sequence, IRB }, one resource index corresponds to one two-dimensional resource, and table 1 can be seen. The IRB index is configured from low to high according to the frequency domain position, and the orthogonal sequence index is described with respect to resource pool configuration/pre-configuration, but the present application is not limited to other forms. In table 1, the index of the resource S is configured in such a way that the index of the IRB increases and the index of the orthogonal sequence increases. For example, the configuration may be performed such that the index of the first orthogonal sequence increases and the index of the second IRB increases, and this is not a limitation of the present application.

It should be understood that the index of IRBs and the index of orthogonal sequences in table 1 are merely examples, and that there may be more IRBs and/or orthogonal sequences in the system, which is not limited in this application.

TABLE 1

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As shown in table 1, one IRB and one orthogonal sequence constitute one two-dimensional resource. Each two-dimensional resource is configured with a resource index. For example, resource index 0 indicates { IRB0, orthogonal sequence 0}, resource index 1 indicates { IRB1, orthogonal sequence 0}, etc. Wherein the resource index of the one or more resources S allocated to the minimum time-frequency unit is located within the following interval (j and k indicate the time-domain position and the frequency-domain position of the minimum time-frequency unit, respectively, as described above):

wherein,configuration period for symbol a, N _interlace For the number of IRBs in the resource pool, +.> It is to be understood that R is->Is an integer multiple of (a). Wherein R is the total number of two-dimensional resources (resources S), and the indexes of the two-dimensional resources are 0-R-1.

In one example, j=2, k=2, n _interlace ＝4，R=32, and if the time domain position and the frequency domain position of a certain minimum time-frequency unit are { j=2, k=2 }, they correspond to { resource index 20} and { resource index 21}.

In one possible implementation, equation (1) is an implementation of the mapping rule Q.

Another possible implementation way is that the index of one or more resources S allocated to the smallest time-frequency unit satisfies the pair Taking remainder equal to->The time domain position and frequency domain position of the smallest time-frequency unit are formulated as follows (j and k indicate the time domain position and frequency domain position, respectively, as described above):

for example, r=32, the present application supports that the resource index of the two-dimensional resource corresponding to { j=2, k=2 } is {10, 26} (remainder is 10).

To sum up, resource index pairsThe way to do the remainder operation is an implementation of the mapping rule Q.

The present application supports configuring continuous indexes to IRBs. For example, the number of IRBs in a resource pool is N, and the present application supports configuring indexes (e.g., 0-N-1) in the order of the frequency domain from low to high. The present application also supports the configuration of contiguous indexes for orthogonal sequences of system configurations. For example, when H orthogonal sequences are arranged in the system, the consecutive indexes arranged for the H orthogonal sequences are 0 to H-1. Then, the application supports continuous resource index to two-dimensional resource allocation composed of IRB and orthogonal sequence.

The specific pairing of IRBs with orthogonal sequences is not limited in this application, and the contents shown in table 1 are only exemplary references.

In addition, the support system configures one or more resources S in the form of { orthogonal sequences, IRBs } for each minimum time-frequency unit, and after the first communication device determines one or more resources S according to a part or all occupied by the first resources, the first communication device may further determine one or more PSFCH resources for transmitting the PSFCH in combination with at least one CS pair. Accordingly, the first communication device selects one PSFCH resource from the one or more PSFCH resources to transmit the first PSFCH.

In one possible implementation, the determining, by the first communication device in S420b, one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource includes:

s420b1, the first communication device determines the one or more PSFCH resources according to the one or more minimum time-frequency units, at least one resource S corresponding to some or all of the one or more minimum time-frequency units, and at least one CS pair.

In one example, the first resource occupies a minimum time-frequency unit, and the time-domain position and the frequency-domain position of the minimum time-frequency unit are { j=2, k=2. At this time, the first communication apparatus determines two-dimensional resources corresponding to the { resource index 20} and the { resource index 21} according to the time domain position and the frequency domain position, and determines one or more PSFCH resources according to the { resource index 20}, { resource index 21} and at least one CS pair configured by the system, where each of the one or more PSFCH resources includes { IRB, orthogonal sequence, CS pair }, and { IRB, orthogonal sequence } in each resource is a two-dimensional resource corresponding to the { resource index 20} or { resource index 21 }.

If the first resource occupies a plurality of minimum time-frequency units, the first communication device may determine a corresponding two-dimensional resource according to a time domain position and a frequency domain position of a minimum time-frequency unit with a lowest/highest frequency domain position, or determine a corresponding two-dimensional resource according to a time domain position and a frequency domain position of each time-frequency unit in all minimum time-frequency units occupied by the first resource, and then determine one or more PSFCH resources according to the two-dimensional resources and at least one CS pair. Wherein each of the one or more PSFCH resources includes { IRB, orthogonal sequence, CS pair } and { IRB, orthogonal sequence } in each resource is one of the two-dimensional resources determined from the first resource.

In summary, the first communication device determines the one or more PSFCH resources based on the minimum time-frequency unit occupied by the first resource.

After determining the one or more PSFCH resources, an index needs to be reconfigured for the one or more PSFCH resources. It should be understood that the index is allocated to the one or more PSFCH resources, that is, the index is allocated to the three-dimensional resource formed by the one or more { IRB, orthogonal sequence, CS pair }. Wherein, the index of the two-dimensional resource corresponding to { IRB, orthogonal sequence } is already configured, and the index of CS pair multiplexes the configuration mode in R16. The method can be considered to set indexes according to the ascending order of indexes of two-dimensional resources and then set indexes according to the ascending order of indexes of CS pairs; or, the indexes may be set according to the ascending order of the indexes of the CS pair, and then the indexes may be set according to the ascending order of the indexes of the two-dimensional resources.

In one possible implementation, the resources S include { orthogonal sequence, CS pair }, and the first communication device in S420a allocates at least one resource S for each minimum time-frequency unit of the scheduling PSSCH, including:

s420a2, the first communication device determines at least one resource S according to the time domain position of each minimum time-frequency unit.

Specifically, the resources S include { orthogonal sequences, CS pair }, and the first communication device configures one or more resources S for each minimum time-frequency unit according to the mapping rule Q.

It is understood that the resource S includes { orthogonal sequence, CS pair }, and the resource S is a two-dimensional resource. As shown in table 2, each resource S is configured with a resource index, and the resource index corresponds to the resource S one by one. The resource S includes { orthogonal sequence, CS pair }, one resource index corresponds to one two-dimensional resource, and table 2 can be seen.

TABLE 2

As shown in table 2, one CS pair and one orthogonal sequence constitute one two-dimensional resource. Each two-dimensional resource is configured with a resource index. For example, resource index 0 indicates { CS pair0, orthogonal sequence 0}, resource index 1 indicates { CS pair1, orthogonal sequence 0}, and so on. The present application describes, by way of example, the index of the orthogonal sequence being configured/preconfigured for the resource pool, and the index of the CS pair being in the R16 version of the multiplex, but is not limited to other forms. In table 2, the index of the resource S is configured in such a way that the index of the CS pair increases first and the index of the orthogonal sequence increases later. In addition, the configuration may be performed in such a manner that the index of the orthogonal sequence increases and the index of the CS pair increases, and the present invention is not limited thereto.

It should be understood that the indices of CS pairs and the indices of orthogonal sequences in table 2 are merely examples, and that many more CS pairs and/or orthogonal sequences are possible in the system, and the invention is not limited in this respect.

Wherein the resource index of the one or more resources S allocated to the minimum time-frequency unit is located within the following interval (j and k indicate the time-domain position and the frequency-domain position of the minimum time-frequency unit, respectively, as described above):

wherein,for the configuration period of symbol A +.>It is to be understood that R is->Is an integer multiple of (a).

As one example, j=2,r=24, and when the time domain position of a certain minimum time-frequency unit is { j=2 }, it corresponds to 6 two-dimensional resources corresponding to { resource index 12}, { resource index 13}, { resource index 14}, { resource index 15}, { resource index 16}, and { resource index 17}, etc.

In one example, when the time domain position of the smallest time-frequency unit occupied by the first resource is { j=2 }, the first communication apparatus determines the corresponding { resource index 12}, { resource index 13}, { resource index 14}, { resource index 15}, { resource index 16}, and { resource index 17} according to the time domain position.

In one possible implementation, equation (3) is an implementation of the mapping rule Q.

Another possible implementation way is that the index of one or more resources S allocated to the smallest time-frequency unit satisfies the pairTaking the remainder equal to j, expressed as follows (j and k as described aboveTime domain position and frequency domain position of the minimum time-frequency unit are indicated, respectively):

For example, r=16, the present application supports a resource index of {2,6, 10, 14} (remainder 2) for the two-dimensional resource pair corresponding to { j=2, k=2 }.

One possible implementation, the resource index pairThe way to do the remainder operation is an implementation of the mapping rule Q.

In one possible implementation, the at least one IRB is determined by the first communication device according to an IRB occupied by the first resource. For example, the first communication device receives the first PSSCH at the IRB indicated by k=2, and the first communication device transmits the first PSFCH at the IRB indicated by k=2. Wherein N is _IRB =10. For another example, if the first PSSCH received by the first communication apparatus occupies IRBs indicated by k=2 and 3, the first communication apparatus may transmit the first PSFCH at the IRB indicated by k=2 or may transmit the first PSFCH at the IRB indicated by k=3.

It should be understood that the present application is not limited to a specific pairing of CS pair with orthogonal sequence, and that the contents shown in table 2 are only exemplary references.

In one possible implementation, the determining, by the first communication device in S420b, one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource includes:

s420b2, the first communication device determines the one or more PSFCH resources according to the one or more minimum time-frequency units, at least one resource S corresponding to some or all of the one or more minimum time-frequency units, and at least one IRB.

Specifically, the first communication apparatus constructs the above { resource index 12}, { resource index 13}, { resource index 14}, { resource index 15}, { resource index 16}, { resource index 17} and at least one IRB into one or more PSFCH resources, wherein each PSFCH resource includes { IRB, CS pair, orthogonal sequence }, and each PSFCH resource includes CS pair, orthogonal sequence } belonging to one of the above 6 two-dimensional resources.

Further, the first communication device determines a first PSFCH resource from the one or more PSFCH resources.

In summary, the first communication device determines the one or more PSFCH resources based on the minimum time-frequency unit occupied by the first resource.

Specifically, the support system configures one or more resources S in the form of { CS pair, orthogonal sequence } for each minimum time-frequency unit, and after the first communication device determines one or more resources S according to the minimum time-frequency unit occupied by the first resource, the first communication device may further determine one or more PSFCH resources for transmitting the PSFCH in conjunction with at least one IRB. Accordingly, the first communication device selects one PSFCH resource from the one or more PSFCH resources to transmit the first PSFCH.

After determining the one or more PSFCH resources, an index needs to be reconfigured for the one or more PSFCH resources. It should be understood that the index is allocated to the one or more PSFCH resources, that is, the index is allocated to the three-dimensional resource formed by the one or more { IRB, orthogonal sequence, CS pair }. The index of the two-dimensional resource corresponding to { CS pair, orthogonal sequence } is already configured, and the index of IRB multiplexes the configuration mode in R16. It is considered that the indexes are set according to the ascending order of the indexes of the two-dimensional resources, and then the indexes are set according to the ascending order of the indexes of the IRB; or, the index may be set according to the ascending order of the index of the IRB, and then the index may be set according to the ascending order of the index of the two-dimensional resource.

In one possible implementation, when the resources S include { orthogonal sequence, IRB, CS pair }, the first communication device in S420a allocates at least one resource S for each minimum time-frequency unit for scheduling the PSSCH, including:

s420a3, the first communication device determines at least one resource S according to the time domain position and the frequency domain position of each minimum time-frequency unit.

Specifically, when the resources S include { orthogonal sequences, IRBs, CS pair }, the present application allocates the one or more resources S for each minimum time-frequency unit, where the one or more resources S are allocated for the minimum time-frequency unit according to the time-domain position and the frequency-domain position of the minimum time-frequency unit. The resource S is a three-dimensional resource, and the method for indexing the three-dimensional resource can be referred to as the method for indexing the two-dimensional resource. Specifically, the manner of configuring the index to S is such that the index of the CS pair increases first according to the orthogonal index, then the IRB index increases, and finally the index of the CS pair increases. It should be appreciated that the order in which the three-dimensional indexes are grown when the indexes are configured may be different from that described above.

After the index is configured, the method for establishing the mapping rule for the three-dimensional resource and the minimum time-frequency unit can be referred to the method for establishing the mapping rule for the two-dimensional resource and the minimum time-frequency unit, which is not described herein.

S420b3, the first communication device determines the one or more PSFCH resources according to the one or more minimum time-frequency units, and at least one resource S corresponding to some or all of the one or more minimum time-frequency units.

For example, when the first resource occupies three minimum time-frequency units, each minimum time-frequency unit corresponds to one or more resources S, and the first communication device uses, as the one or more PSFCH resources, one or more resources S corresponding to a minimum time-frequency unit with a minimum frequency domain index in the three minimum time-frequency units; or the first communication device uses one or more resources S corresponding to the minimum time-frequency unit with the largest frequency domain index in the three minimum time-frequency units as one or more PSFCH resources; alternatively, the first communication apparatus may use all of the resources S corresponding to all of the minimum time-frequency units as the one or more PSFCH resources, which is not limited in this application.

S430, the first communication device sends a first PSFCH to the second communication device on the first PSFCH resource, wherein the first PSFCH is used for the first communication device to feed back whether the first PSSCH is successfully demodulated.

Accordingly, the second communication device receives the first PSFCH from the first communication device and determines whether the first communication device successfully demodulates the first PSSCH based on the first PSFCH.

Specifically, the first PSFCH resource of the first PSFCH transmitted by the first communication apparatus belongs to one or more PSFCH resources described above. Wherein the first PSFCH resource includes a first orthogonal sequence, a first IRB, and a first CS pair.

By introducing the orthogonal sequence, the resources of the PSFCH are expanded from two dimensions { IRB, CS pair } to three dimensions { IRB, CS pair, orthogonal sequence }, so that the number of resources for transmitting the PSFCH can be increased, and the requirement of the receiving end for side-link feedback of the transmitting end under the unlicensed spectrum can be met.

In one possible implementation manner, the first communication apparatus determines, from the one or more PSFCH resources, a first PSFCH resource according to identification information corresponding to the first PSSCH.

In one possible implementation, the first communication device sends the first PSFCH to the second communication device at the first PSFCH resource, including:

s430a, the first communication device determines a first PSFCH resource from the one or more PSFCH resources according to the identification information corresponding to the first PSSCH;

s430b, the first communication device transmits the first PSFCH on the first PSFCH resource.

In one possible implementation, the identification information includes an identification of the second communication device, which is carried in the side-uplink control information (sidelink control information, SCI) associated with the first PSSCH. More specifically, the identifier of the second communication device is carried in the second-level SCI associated with the first PSSCH, and the identifier is the Source identifier (Source ID). At this time, the source identification may be considered to correspond to the first PSSCH. For example, the identification of the second communication device is a source identification (source ID). The first communication device determines a resource index of the first PSFCH resource based on the identification of the second communication device. The resource index of the first PSFCH resource is:

P _ID mod D (5)

Specifically, D is the number of PSFCH resources in the at least one PSFCH resource. P (P) _ID Is the identity of the second communication device, which is carried by the second associated with the first PSSCHAmong the stages SCI.

In another possible scenario, the second-order SCI associated with the PSSCH would indicate that determining the PSFCH resource also requires the intra-group identity M of the first communication device _ID The intra-group identifier is configured by an application layer (application layer), and the configuration information may be carried in the first PSSCH, or may be carried in another PSSCH transmitted to the first communication device by the second communication device. At this time, both the source identity and the intra-group identity can be considered to correspond to the first PSSCH. Wherein, the resource index of the first PSFCH resource is:

(P _ID +M _ID )mod D (6)

in this way, the first communication device is supported to determine the first PSFCH resource according to the identification information corresponding to the first PSSCH, so that the first communication device can send the corresponding PSFCH through the appropriate PSFCH resource.

It will be appreciated that the manner in which the first communication device determines the first PSFCH resources from the first resources occupied by the first PSSCH (including determining one or more PSFCH resources from the first resources and determining the first PSFCH resources from the one or more PSFCH resources) is protocol-specific. Thus, the second communication device may also determine the first PSFCH resource using the same method and detect the first PSFCH on the first PSFCH resource. That is, on the corresponding IRB, the second communication device uses a certain CS of the base sequence to perform inner product on the sequence subjected to block spread spectrum processing of a certain orthogonal sequence and the received signal, and if the inner product result is greater than a set threshold value, it indicates that the second communication device detects the corresponding ACK/NACK.

In one possible implementation, the method 400 further includes:

s440, the first communication device transmits a redundancy signal on the second PSFCH resource.

Alternatively, the first communication device may transmit the redundant signal to a second communication device, wherein the second communication device is a transmitting device of the first PSSCH.

Specifically, the second PSFCH resource includes a second orthogonal sequence, a second CS pair, and a second IRB. In addition, the second PSFCH resource is orthogonal to each of the at least one resource S allocated for each minimum time frequency unit described above.

Specifically, the first communication apparatus does not transmit the PSFCH on the transmission occasion of the PSFCH corresponding to the received PSSCH. For example, the second order SCI associated with the PSSCH indicates that the first communication device is not transmitting HARQ feedback, or that the first communication device is only transmitting NACKs and is not transmitting ACKs, and that the first communication device demodulates the state of the PSSCH to ACKs. At this time, since the first communication apparatus does not transmit the PSFCH at the transmission timing of the PSFCH, the time-frequency resource corresponding to the transmission timing may be occupied by the communication apparatus adopting other technologies, such as occupied by the communication apparatus adopting WIFI, which may affect the transmission of the subsequent SL-U communication apparatus.

In order to avoid affecting the transmission of the communication device of the subsequent SL-U, in the above case, the first communication device will send, on the second IRB, a certain CS of the base sequence in the second CS pair using the second orthogonal sequence at the transmission timing of the PSFCH corresponding to the received PSSCH. It should be appreciated that the above transmission is a redundant transmission, which does not carry HARQ information, and is mainly intended to occupy transmission occasions of the PSFCH, preventing occupation by communication devices of other communication systems on the unlicensed spectrum.

To prevent the redundant transmission from interfering with the PSFCH feedback carrying HARQ information, the resources used by the redundant transmission are kept in an orthogonal relationship with at least one resource allocated for each minimum time-frequency unit. Specifically, the PSFCH resource used for the redundant transmission includes three dimensions, i.e., IRB, CS pair, and orthogonal sequence, so that the resource of any one dimension of the PSFCH resource for the redundant transmission may be different from the resource of the corresponding dimension in at least one resource allocated for each minimum time-frequency unit, for example, the IRB used is different, or the CS pair is different, or the orthogonal sequence is different.

The redundant signal sent by the first communication device on the second PSFCH resource is used for occupying the PSFCH transmission time corresponding to the first PSSCH, so that the communication device adopting other communication technologies is prevented from occupying the time slot position because the first communication device does not send the PSFCH.

Illustratively, at a certain slot position (e.g., symbol a) of a Channel Occupancy Time (COT), the first communication device does not transmit the PSFCH as indicated by the second-order SCI associated with the PSSCH, which may result in a loss of COT.

Illustratively, in a multicast scenario, the first communication device successfully demodulates the PSSCH when only a NACK is needed, and thus does not need to transmit the PSFCH to the second communication device.

In summary, both of the above cases result in loss of COT.

Accordingly, the present application supports configuring/pre-configuring one or more PSFCH resources for occupying symbol a where the PSFCH is located when the first communication device is not transmitting the PSFCH for the resource pool.

In other words, the present application supports dividing all PSFCH resources into two resource sets, resource set 1 and resource set 2, respectively. Wherein resource set 1 is used to occupy symbol a and resource set 2 is used to transmit the PSFCH. The first communication device may select any one of the resources in the set of resources 1 to transmit the redundancy signal.

One possible implementation is if R isOr->When non-integer multiples of (2) are used, the application supports the use of redundant resources as occupied resources, ensuring that R is +.>Or->Is an integer multiple of (a).

In one possible implementation, the present application supports informing the first communication device of the occupied resources employed by the configuration/pre-configuration manner of indicating the indexes of the PSFCH resources used as the occupied resources, such as indicating the start index of the PSFCH resources and the number of PSFCH resources, or indicating the start index and the end index of the PSFCH resources.

Having described method embodiments of the present application, corresponding apparatus embodiments are described below.

In order to implement the functions in the methods provided in the embodiments of the present application, the terminal and the network device may include hardware structures and/or software modules, and implement the functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Some of the functions described above are performed in a hardware configuration, a software module, or a combination of hardware and software modules, depending on the specific application of the solution and design constraints.

Fig. 6 is a schematic block diagram of a communication device 600 of an embodiment of the present application. The communication device 600 includes a processor 610 and a communication interface 620, the processor 610 and the communication interface 620 being connectable to each other through a bus 630. The communication device 600 shown in fig. 6 may be the first communication device or the second communication device.

Optionally, the communication device 600 further comprises a memory 640.

Memory 640 includes, but is not limited to, random access memory (random access memory, RAM), read-only memory (ROM), erasable programmable read-only memory (erasable programmable read only memory, EPROM), or portable read-only memory (compact disc read-only memory, CD-ROM), with memory 640 for associated instructions and data.

The processor 610 may be one or more central processing units (central processing unit, CPU), and in the case where the processor 610 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

When the communication device 600 is a first communication device, the processor 610 in the communication device 600 is illustratively configured to: receiving a first PSSCH from a second communication device on a first resource; determining one or more PSFCH resources from the first resource, each PSFCH resource comprising an orthogonal sequence, an interleaved resource block, and a cyclic shift pair; the first PSFCH is sent to the second communication device on the first PSFCH resource, and the first PSFCH is used for feeding back whether the first communication device successfully demodulates the first PSSCH.

The foregoing is described by way of example only. When the communication device 600 is a first communication device, it will be responsible for executing the methods or steps related to the first communication device in the foregoing method embodiments.

When the communication device 600 is a second communication device, the processor 610 in the communication device 600 is illustratively configured to: transmitting the first PSSCH to the first communication device; a first PSFCH is received from a first communication device.

The foregoing is described by way of example only. When the communication device 600 is a second communication device, it will be responsible for executing the methods or steps related to the second communication device in the method embodiments described above.

The above description is merely exemplary in nature. Specific content can be seen from the content shown in the above method embodiment. In addition, the implementation of the individual operations in fig. 6 may also correspond to the corresponding description of the method embodiment shown with reference to fig. 4.

Fig. 7 is a schematic block diagram of a communication device 700 of an embodiment of the present application. The communication apparatus 700 may be a network device or a terminal device in the above embodiment, or may be a chip or a module in the network device or the terminal device, for implementing the method related to the above embodiment. The communication device 700 includes a transceiver unit 710 and a processing unit 720. The transceiver unit 710 and the processing unit 720 are exemplarily described below.

The transceiver unit 710 may include a transmitting unit and a receiving unit, for implementing the functions of transmitting or receiving in the above-described method embodiments, respectively; and may further comprise a processing unit for implementing functions other than transmission or reception.

When the communication device 700 is a first communication device, the transceiving unit 710 is illustratively configured to receive a first PSSCH from a second communication device on a first resource; and is further configured to transmit the first PSFCH to the second communication device at the first PSFCH resource. The processing unit 720 is configured to determine one or more PSFCH resources from the first resource, each PSFCH resource comprising an orthogonal sequence, an interleaved resource block, and a cyclic shift pair.

Optionally, the communication device 700 further comprises a storage unit 730, the storage unit 730 being configured to store a program or code for performing the aforementioned method.

The foregoing is described by way of example only. When the communication device 700 is a first communication device, it will be responsible for executing the methods or steps related to the first communication device in the foregoing method embodiments.

When the communication apparatus 700 is a second communication apparatus, the transceiving unit 710 is illustratively configured to transmit the first PSSCH; and is also configured to receive the first PSFCH.

Optionally, the communication device 700 may further comprise a processing unit 720 for performing the content of the steps related to processing, coordination, etc. of the second communication device.

Optionally, the communication device 700 further comprises a storage unit 730, which storage unit 730 is adapted to store a program or code for performing the aforementioned method.

The foregoing is described by way of example only. When the communication device 700 is a second communication device, it will be responsible for executing the methods or steps related to the second communication device in the method embodiments described above.

In addition, the implementation of each operation of fig. 7 may also be correspondingly described with reference to the method shown in the foregoing embodiment, which is not described herein again.

The apparatus embodiments shown in fig. 6 and 7 are for implementing the content described in fig. 4 for the method embodiments described above. Accordingly, the specific steps and methods for performing the apparatus shown in fig. 6 and fig. 7 may be described with reference to the foregoing method embodiments.

It should be understood that the transceiver unit may include a transmitting unit and a receiving unit. The transmitting unit is used for executing the transmitting action of the communication device, and the receiving unit is used for executing the receiving action of the communication device. For convenience of description, the transmitting unit and the receiving unit are combined into one transceiver unit in the embodiment of the present application. The description is unified herein, and will not be repeated.

Fig. 8 is a schematic diagram of a communication device 800 according to an embodiment of the present application. The communication apparatus 800 may be used to implement the functions of the network device or the terminal device in the above method. The communication device 800 may be a chip in a network apparatus or a terminal apparatus. Wherein the communication apparatus 800 includes: an input-output interface 820 and a processor 810. The input-output interface 820 may be an input-output circuit. The processor 810 may be a signal processor, a chip, or other integrated circuit that may implement the methods of the present application. The input/output interface 820 is used for inputting or outputting signals or data.

For example, when the communication device 800 is a first communication device, the input-output interface 820 is used to receive a first PSSCH from a second communication device on a first resource. The processor 810 is configured to determine one or more PSFCH resources from the first resource, each PSFCH resource comprising an orthogonal sequence, an interleaved resource block, and a cyclic shift pair. Wherein the processor 810 is further configured to perform part or all of the steps of any one of the methods provided herein.

For example, when the communication device 800 is a second communication device, the input-output interface 820 is used to send the first PSSCH to the first communication; the input-output interface 820 is also used to receive a first PSFCH from a first communication device. Wherein the processor 810 is configured to perform some or all of the steps of any one of the methods provided herein.

In one possible implementation, the processor 810 implements functions implemented by a network device or terminal device by executing instructions stored in a memory.

Optionally, the communication device 800 further comprises a memory.

In the alternative, the processor and memory are integrated.

Optionally, the memory is external to the communication device 800.

In one possible implementation, the processor 810 may be a logic circuit, and the processor 810 inputs/outputs messages or signaling through the input-output interface 820. The logic circuit may be a signal processor, a chip, or other integrated circuits that may implement the methods of embodiments of the present application.

The above description of the apparatus of fig. 8 is merely an exemplary description, and the apparatus can be used to perform the method described in the foregoing embodiment, and details of the foregoing description of the method embodiment may be referred to herein and will not be repeated herein.

Fig. 9 is a schematic block diagram of a communication device 900 of an embodiment of the present application. The communication device 900 may be a network device or a chip. The communications apparatus 900 can be configured to perform the operations performed by the network device in the method embodiments described above.

When the communication apparatus 900 is a network device, for example, a base station. Fig. 9 shows a simplified schematic of a base station architecture. The base station includes portions 910, 920, and 930. The 910 part is mainly used for baseband processing, controlling the base station, etc.; portion 910 is typically a control center of the base station, and may be generally referred to as a processor, for controlling the base station to perform the processing operations on the network device side in the above method embodiment. Portion 920 is mainly used for storing computer program code and data. The 930 part is mainly used for receiving and transmitting radio frequency signals and converting the radio frequency signals and baseband signals; section 930 may be generally referred to as a transceiver module, transceiver circuitry, or transceiver, among others. The transceiver module of section 930, which may also be referred to as a transceiver or transceiver, includes an antenna 933 and radio frequency circuitry (not shown) that is primarily used for radio frequency processing. Alternatively, the means for implementing the receiving function in section 930 may be regarded as a receiver and the means for implementing the transmitting function may be regarded as a transmitter, i.e. section 930 comprises a receiver 932 and a transmitter 931. The receiver may also be referred to as a receiving module, receiver, or receiving circuit, etc., and the transmitter may be referred to as a transmitting module, transmitter, or transmitting circuit, etc.

Portions 910 and 920 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used for reading and executing the program in the memory to realize the baseband processing function and control of the base station. If there are multiple boards, the boards can be interconnected to enhance processing power. As an alternative implementation manner, the multiple boards may share one or more processors, or the multiple boards may share one or more memories, or the multiple boards may share one or more processors at the same time.

For example, in one implementation, the transceiver module of section 930 is configured to perform the transceiver-related process performed by the network device in the embodiment shown in fig. 4. The processor of portion 910 is configured to perform processes related to the processing performed by the network device in the embodiment shown in fig. 4.

In another implementation, the processor of portion 910 is configured to perform the processing related procedures performed by the communication device in the embodiment shown in fig. 4.

In another implementation, the transceiver module of part 930 is configured to perform the transceiver-related procedure performed by the communication device in the embodiment shown in fig. 4.

It should be understood that fig. 9 is only an example and not a limitation, and that the above-described network devices including processors, memories, and transceivers may not rely on the structures shown in fig. 6-8.

When the communication device 900 is a chip, the chip includes a transceiver, a memory, and a processor. Wherein, the transceiver can be an input-output circuit and a communication interface; the processor is an integrated processor, or microprocessor, or integrated circuit on the chip. The sending operation of the network device in the above method embodiment may be understood as the output of the chip, and the receiving operation of the network device in the above method embodiment may be understood as the input of the chip.

Fig. 10 is a schematic block diagram of a communication apparatus 1000 of an embodiment of the present application. The communication device 1000 may be a terminal equipment, a processor of a terminal equipment, or a chip. The communication apparatus 1000 may be used to perform the operations performed by the terminal device or the communication device in the above-described method embodiments.

Fig. 10 shows a simplified schematic structure of a terminal device when the communication apparatus 1000 is the terminal device. As shown in fig. 10, the terminal device includes a processor, a memory, and a transceiver. The memory may store computer program code, and the transceiver includes a transmitter 1031, a receiver 1032, radio frequency circuitry (not shown), an antenna 1033, and input and output devices (not shown).

The processor is mainly used for processing communication protocols and communication data, controlling the terminal equipment, executing software programs, processing data of the software programs and the like. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for converting a baseband signal and a radio frequency signal and processing the radio frequency signal. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. An input/output device. For example, touch screens, display screens, keyboards, etc. are mainly used for receiving data input by a user and outputting data to the user. It should be noted that some kinds of terminal apparatuses may not have an input/output device.

When data need to be sent, the processor carries out baseband processing on the data to be sent and then outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit carries out radio frequency processing on the baseband signal and then sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of illustration, only one memory, processor, and transceiver are shown in fig. 10, and in an actual end device product, one or more processors and one or more memories may be present. The memory may also be referred to as a storage medium or storage device, etc. The memory may be provided separately from the processor or may be integrated with the processor, which is not limited by the embodiments of the present application.

In the embodiment of the application, the antenna and the radio frequency circuit with the transceiving function can be regarded as a transceiving module of the terminal equipment, and the processor with the processing function can be regarded as a processing module of the terminal equipment.

As shown in fig. 10, the terminal device includes a processor 1010, a memory 1020, and a transceiver 1030. The processor 1010 may also be referred to as a processing unit, processing board, processing module, processing device, etc., and the transceiver 1030 may also be referred to as a transceiver unit, transceiver, transceiving device, etc.

Alternatively, the means for implementing the receiving function in the transceiver 1030 may be regarded as a receiving module, and the means for implementing the transmitting function in the transceiver 1030 may be regarded as a transmitting module, i.e. the transceiver 1030 comprises a receiver and a transmitter. The transceiver may also be referred to as a transceiver, transceiver module, transceiver circuitry, or the like. The receiver may also be sometimes referred to as a receiver, a receiving module, a receiving circuit, or the like. The transmitter may also sometimes be referred to as a transmitter, a transmitting module, or a transmitting circuit, etc.

For example, in one implementation, the processor 1010 is configured to perform the processing actions on the terminal device side in the embodiment shown in fig. 4, and the transceiver 1030 is configured to perform the transceiving actions on the first communication device side in fig. 4.

For example, in one implementation, the processor 1010 is configured to perform the processing actions on the terminal device side in the embodiment shown in fig. 4, and the transceiver 1030 is configured to perform the transceiving actions on the second communication device side in fig. 4.

It should be understood that fig. 10 is only an example and not a limitation, and the above-described terminal device including the transceiver module and the processing module may not depend on the structures shown in fig. 6 to 8.

When the communication device 1000 is a chip, the chip includes a processor, a memory, and a transceiver. Wherein the transceiver may be an input-output circuit or a communication interface; the processor may be an integrated processing module or microprocessor or an integrated circuit on the chip. The sending operation of the terminal device in the above method embodiment may be understood as the output of the chip, and the receiving operation of the terminal device in the above method embodiment may be understood as the input of the chip.

The present application also provides a chip including a processor for calling from a memory and executing instructions stored in the memory, so that a communication device mounted with the chip performs the methods in the examples above.

The present application also provides another chip, including: the input interface, the output interface and the processor are connected through an internal connection path, and the processor is used for executing codes in the memory, and when the codes are executed, the processor is used for executing the methods in the examples. Optionally, the chip further comprises a memory for storing a computer program or code.

The present application also provides a processor, coupled to the memory, for performing the methods and functions of any of the embodiments described above involving a network device or a terminal device.

In another embodiment of the present application, a computer program product comprising instructions is provided, which when run on a computer, implements the method of the previous embodiments.

The present application also provides a computer program which, when run in a computer, implements the method of the foregoing embodiments.

In another embodiment of the present application, a computer readable storage medium is provided, which stores a computer program, which when executed by a computer, implements the method described in the previous embodiment.

In the description of the embodiments of the present application, unless otherwise indicated, "plurality" means two or more than two. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", and the like are used to distinguish the same item or similar items having substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ. Meanwhile, in the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions.

Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion that may be readily understood.

In the description of the embodiments of the present application, unless otherwise indicated, "/" means that the associated object is an "or" relationship, for example, a/B may represent a or B; the term "and/or" in this application is merely an association relation describing an association object, and means that three kinds of relations may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural.

In various embodiments of the present application, the sequence number of each process does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed.

Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or, what contributes to the prior art, or part of the technical solutions may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The foregoing is merely a specific implementation of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto, and any person skilled in the art may easily think about changes or substitutions within the technical scope of the embodiments of the present application, and all changes and substitutions are included in the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims (28)

1. A side-link feedback method, comprising:

the first communication device receives a first physical side uplink shared channel PSSCH from the second communication device on a first resource;

the first communication device determining one or more physical side uplink feedback channel, PSFCH, resources from the first resource, each of the one or more PSFCH resources comprising an orthogonal sequence, an interleaved resource block, and a cyclic shift pair;

the first communication device transmitting a first PSFCH to the second communication device on a first PSFCH resource, the first PSFCH being used to feed back whether the first communication device successfully demodulates the first PSSCH,

the first PSFCH resource belongs to the one or more PSFCH resources, the first PSFCH resource comprising a first orthogonal sequence, a first interleaved resource block, and a first cyclic shift pair.

2. The method of claim 1, wherein the first communication device determining one or more PSFCH resources from the first resource comprises:

the first communication device determines one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource and at least one resource corresponding to part or all of the one or more minimum time-frequency units;

the at least one resource is allocated for each minimum time-frequency unit for transmitting the PSSCH;

each of the at least one resource includes any one of:

{ orthogonal sequence, interleaved resource block }, { orthogonal sequence, cyclic shift pair }, or, { orthogonal sequence, interleaved resource block, cyclic shift pair }.

3. The method of claim 2, wherein each resource comprises { orthogonal sequences, interleaved resource blocks },

the first communication device determining the one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource, including:

the first communication device determines the one or more PSFCH resources according to the one or more minimum time-frequency units, at least one resource corresponding to some or all of the one or more minimum time-frequency units, and at least one cyclic shift pair.

4. The method of claim 2, wherein each resource comprises { cyclic shift pairs, orthogonal sequences },

the first communication device determining the one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource, including:

the first communication device determines the one or more PSFCH resources according to the one or more minimum time-frequency units, at least one resource corresponding to some or all of the one or more minimum time-frequency units, and at least one interleaved resource block.

5. The method of claim 4, wherein the step of determining the position of the first electrode is performed,

the at least one interleaved resource block is determined by the first communication device from the frequency domain locations of some or all of the one or more minimum time-frequency units.

6. The method according to any of claims 2 to 5, wherein the at least one resource is allocated for each minimum time-frequency unit for transmitting a PSSCH, comprising:

the at least one resource is allocated according to the time domain position and/or the frequency domain position of each minimum time-frequency unit.

7. The method of claim 6, wherein the time domain location and/or frequency domain location comprises a first index and/or a second index,

the first index indicates a time domain position of the each minimum time-frequency unit, and the second index indicates a frequency domain position of the each minimum time-frequency unit.

8. The method according to any one of claims 1 to 7, further comprising:

the first communication device transmitting a redundancy signal on a second PSFCH resource;

wherein the second PSFCH resource comprises a second orthogonal sequence, a second interleaved resource block, and a second cyclic shift pair, the second PSFCH resource being orthogonal to each of the at least one resource.

9. The method according to any one of claims 1 to 8, further comprising:

and the first communication device determines the first PSFCH resource from the one or more PSFCH resources according to the identification information corresponding to the first PSSCH.

10. The method of claim 9, wherein the identification information comprises an identification of the second communication device carried in the side-uplink control information associated with the first PSSCH.

11. The method of claim 10, wherein the identification information further comprises an intra-group identification of the first communication device.

12. A communication device, comprising:

a transceiving unit for receiving a first physical side uplink shared channel, PSSCH, from a second communication device on a first resource;

a processing unit configured to determine one or more physical side uplink feedback channel, PSFCH, resources from the first resource, each of the one or more PSFCH resources comprising an orthogonal sequence, an interleaved resource block, and a cyclic shift pair;

the transceiver unit is further configured to send a first PSFCH to the second communication device on a first PSFCH resource, where the first PSFCH is used to feed back whether the first communication device successfully demodulates the first PSSCH,

the first PSFCH resource belongs to the one or more PSFCH resources, the first PSFCH resource comprising a first orthogonal sequence, a first interleaved resource block, and a first cyclic shift pair.

13. The apparatus of claim 12, wherein the processing unit is further configured to:

determining the one or more PSFCH resources according to one or more minimum time-frequency units occupied by the first resource and at least one resource corresponding to part or all of the one or more minimum time-frequency units;

The at least one resource is allocated for each minimum time-frequency unit for transmitting the PSSCH;

each of the at least one resource includes any one of:

{ orthogonal sequence, interleaved resource block }, { orthogonal sequence, cyclic shift pair }, or, { orthogonal sequence, interleaved resource block, cyclic shift pair }.

14. The apparatus of claim 13, wherein each resource comprises { orthogonal sequences, interleaved resource blocks },

the processing unit is further configured to determine the one or more PSFCH resources according to the one or more minimum time-frequency units, at least one resource corresponding to a part or all of the one or more minimum time-frequency units, and at least one cyclic shift pair.

15. The apparatus of claim 13, wherein each resource comprises { cyclic shift pairs, orthogonal sequences },

the processing unit is further configured to determine the one or more PSFCH resources according to the one or more minimum time-frequency units, at least one resource corresponding to a part or all of the one or more minimum time-frequency units, and at least one interleaved resource block.

16. The apparatus of claim 15, wherein the at least one interleaved resource block is determined by the processing unit based on a frequency domain location of some or all of the one or more minimum time-frequency units.

17. The apparatus according to any of claims 13 to 16, wherein the at least one resource is allocated for each minimum time-frequency unit for transmitting a PSSCH, comprising:

the at least one resource is allocated according to the time-frequency position and/or the frequency-domain position of each minimum time-frequency unit.

18. The apparatus of claim 17, wherein the time-frequency location and/or frequency-domain location comprises a first index and/or a second index,

the first index indicates a time domain position of the each minimum time-frequency unit, and the second index indicates a frequency domain position of the each minimum time-frequency unit.

19. The apparatus according to any of claims 12 to 18, wherein the transceiver unit is further configured to transmit a redundancy signal on a second PSFCH resource;

wherein the second PSFCH resource comprises a second orthogonal sequence, a second interleaved resource block, and a second cyclic shift pair, the second PSFCH resource being orthogonal to each of the at least one resource.

20. The device according to any one of claims 12 to 19, wherein,

the processing unit is further configured to determine, according to the identification information corresponding to the first PSSCH, the first PSFCH resource from the one or more PSFCH resources.

21. The apparatus of claim 20, wherein the identification information comprises an identification of the second communication apparatus carried in side-uplink control information associated with the first PSSCH.

22. The apparatus of claim 21, wherein the identification information further comprises an intra-group identification of the communication apparatus.

23. A communications apparatus comprising a processor configured to communicate with a host computer by executing a computer program or instructions, or,

the communication device being caused, by logic circuitry, to perform the method of any of claims 1-11.

24. The communication apparatus according to claim 23, further comprising a memory for storing the computer program or instructions.

25. A communication device according to claim 23 or 24, further comprising a communication interface for inputting and/or outputting signals.

26. A communication device comprising logic circuitry for inputting and/or outputting signals and an input-output interface for performing the method of any of claims 1-11.

27. A computer readable storage medium comprising a computer program or instructions which, when run on a computer, cause the method of any one of claims 1-11 to be performed.

28. A computer program product comprising instructions which, when run on a computer, cause the method of any one of claims 1 to 11 to be performed.