COMMUNICATION METHOD, COMMUNICATION DEVICE, AND STORAGE MEDIUM

Abstract

The present disclosure relates to a communication method, a communication device, and a storage medium, which are applied to a first user device, and in response to determining that a resource collision is about to occur in a reserved resource for a second user device to perform data transmission, transmit a potential collision indication to the second user device, indicating that a resource collision is about to occur in a reserved resource for the second user device to perform data transmission. The present disclosure realizes an indication of whether a resource collision has occurred in the reserved resource for the data transmission.

Description

[Technical field]

[0001] The present disclosure relates to the field of communication technologies, and in particular to a communication method, a communication device, and a storage medium. [Background technology]

[0002] Since Long Term Evolution (LTE), the Third Generation Partnership (3GPP) has been formulating Sidelink standards as a standard for direct communication between terminals. In July 2020, the first standard for New Radio (NR) Sidelink was completed in Rel-16, where NR Sidelink solutions are mainly used for Vehicle to Everything (V2X) and public safety. For V2X and public safety, due to time constraints, Release 16 did not fully support the service requirements and operation schemes, and Service and System Aspects (SA) have made some enhancements in Release 17 NR Sidelink. For example, architectural enhancements and system enhancements to support advanced V2X services for 3GPP. In addition, the SA working group is considering other commercial use cases related to NR Sidelink, such as network-controlled interactive services, enhanced energy efficiency relay, widespread coverage, and audiovisual service production. Therefore, at the 86th General Assembly of 3GPP, in drafting Release 17, enhancements to the NR Sidelink were included as a work item in order to improve the reliability of Sidelink transmission and reduce latency.

[0003] In the NR sidelink enhancement, user device A in direct connection communication can transmit a supplementary resource set to user device B whose resource selection method is Mode 2, and user device B takes the supplementary resource set into consideration when selecting resources for its own data transmission. However, in the related art, in the supplementary resource set provided by user device A to user device B, the candidate resources determined by user device B may overlap with resources reserved by other user devices, causing resource collision on the resources on which the second user device transmits data. Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a communication method, a communication device, and a storage medium to overcome problems existing in the related art. [Means for solving the problem]

[0005] According to a first aspect of an embodiment of the present disclosure, a communication method is provided that is applied to a first user device and includes, in response to determining that a resource collision is about to occur in reserved resources over which a second user device is to transmit data, transmitting a potential collision indication to the second user device indicating that a resource collision is about to occur in reserved resources over which the second user device is to transmit data.

[0006] In one embodiment, the step of transmitting a potential collision indication to the second user device comprises: and transmitting a potential collision indication to the second user device using a physical sidelink feedback channel (PSFCH) resource mapped by a first physical sidelink shared channel (PSSCH) transmission resource, where the first PSSCH is a PSSCH in a slot in which a first physical sidelink control channel (PSCCH) is present, and where the first PSCCH is a PSCCH indicating reserved time-frequency resources for a next PSSCH transmission.

[0007] In one embodiment, the communication method further comprises transmitting Hybrid Automatic Repeat Request (HARQ) feedback over the PSFCH resource.

[0008] In one embodiment, the HARQ feedback and the potential collision indication are transmitted via a first PSFCH format carrying the HARQ feedback and the potential collision indication.

[0009] In one embodiment, transmitting the HARQ feedback and the potential collision indication comprises multiplexing and transmitting the HARQ feedback and the potential collision indication on a PSFCH resource having the same time-frequency domain.

[0010] In one embodiment, the step of multiplexing and transmitting the HARQ feedback and the potential collision indication using a PSFCH resource having the same time-frequency domain includes a step of transmitting a base sequence using a PSFCH resource having the same time-frequency domain, and indicating the HARQ feedback and the potential collision indication after the base sequence undergoes a cyclic shift.

[0011] In one embodiment, transmitting the HARQ feedback and the potential collision indication comprises transmitting the HARQ feedback over a PSFCH resource of a first frequency domain and transmitting the potential collision indication over a PSFCH resource of a second frequency domain.

[0012] In one embodiment, the PSFCH resource of the second frequency domain has the same time domain resource as the PSFCH resource of the second frequency domain.

[0013] In one embodiment, the step of transmitting the HARQ feedback and the potential collision indication comprises: The method includes transmitting the HARQ feedback at a first time and transmitting the potential collision indication at a second time earlier than the first time.

[0014] In one embodiment, the communication method further comprises obtaining first indication information indicating a PSFCH resource to be used for transmitting the HARQ feedback and second indication information indicating a PSFCH resource to be used for transmitting the potential collision indication.

[0015] In one embodiment, the first indication information and the second indication information are carried in Radio Resource Control (RRC) signaling.

[0016] In one embodiment, the time interval between the time a potential collision indication is sent to the second user device and the time a resource conflict is about to occur at the second user device is determined by a time interval threshold. End It is.

[0017] In one embodiment, the time interval threshold is determined based on Radio Resource Control (RRC) signaling.

[0018] According to a second aspect of an embodiment of the present disclosure, a communication method is provided that is applied to a second user device and includes the steps of receiving a potential collision indication transmitted from a first user device, the potential collision indication indicating that a resource collision is about to occur for a reserved resource over which the second user device performs data transmission, and performing resource selection based on the potential collision indication.

[0019] In one embodiment, receiving the potential collision indication transmitted from the first user device comprises receiving the potential collision indication transmitted from the first user device using a physical sidelink feedback channel (PSFCH) resource mapped with a first physical sidelink shared channel (PSSCH) transmission resource, where the first PSSCH is a PSSCH in a slot in which a first physical sidelink control channel (PSCCH) is present, and where the first PSCCH is a PSCCH indicating reserved time-frequency resources for a next PSSCH transmission.

[0020] In one embodiment, the communication method further comprises receiving Hybrid Automatic Repeat Request (HARQ) feedback over the PSFCH resource.

[0021] In one embodiment, the HARQ feedback and the potential collision indication are received via a first PSFCH format.

[0022] In one embodiment, receiving the HARQ feedback and the potential collision indication comprises receiving the HARQ feedback and the potential collision indication over a PSFCH resource having the same time-frequency domain.

[0023] In one embodiment, a base sequence is received using a PSFCH resource having the same time-frequency domain, and the HARQ feedback and the potential collision indication are determined based on the base sequence after circular shifting.

[0024] In one embodiment, receiving the HARQ feedback and the potential collision indication comprises receiving the HARQ feedback over a PSFCH resource of a first frequency domain and receiving the potential collision indication over a PSFCH resource of a second frequency domain.

[0025] In one embodiment, the PSFCH resource of the second frequency domain has the same time domain resource as the PSFCH resource of the second frequency domain.

[0026] In one embodiment, receiving the HARQ feedback and the potential collision indication includes receiving the HARQ feedback at a first time and receiving the potential collision indication at a second time earlier than the first time.

[0027] In one embodiment, the communication method further comprises obtaining first indication information indicating a PSFCH resource to be used for receiving the HARQ feedback and second indication information indicating a PSFCH resource to be used for receiving the potential collision indication.

[0028] In one embodiment, the first indication information and the second indication information are carried in Radio Resource Control (RRC) signaling.

[0029] In one embodiment, the time interval between receiving a potential collision indication and a time when a resource collision is about to occur for the second user device is determined by a time interval threshold. End It is.

[0030] In one embodiment, the time interval threshold is determined based on Radio Resource Control (RRC) signaling.

[0031] According to a third aspect of an embodiment of the present disclosure, there is provided a communication device, which is applied to a first user device, the communication device comprising: The method includes: a processing unit configured to determine that a resource collision is about to occur in a reserved resource over which a second user device performs data transmission; and a transmitting unit configured to transmit, in response to the processing unit determining that a resource collision is about to occur in a reserved resource over which the second user device performs data transmission, a potential collision indication to the second user device indicating that a resource collision is about to occur in the reserved resource over which the second user device performs data transmission.

[0032] In one embodiment, the transmitting unit is configured to transmit a potential collision indication to the second user device in the following manner:

[0033] and transmitting a potential collision indication to the second user device using a physical sidelink feedback channel (PSFCH) resource mapped by a first physical sidelink shared channel (PSSCH) transmission resource, where the first PSSCH is a PSSCH in a slot in which a first physical sidelink control channel (PSCCH) is present, and where the first PSCCH is a PSCCH indicating reserved time-frequency resources for a next PSSCH transmission.

[0034] In one embodiment, the transmitting unit is further configured to transmit Hybrid Automatic Repeat Request (HARQ) feedback via the PSFCH resource.

[0035] In one embodiment, the transmitting unit conveys the HARQ feedback and the potential collision indication via a first PSFCH format.

[0036] In one embodiment, the transmitting unit multiplexes and transmits the HARQ feedback and the potential collision indication on a PSFCH resource having the same time-frequency domain.

[0037] In one embodiment, the transmitting unit transmits a base sequence using a PSFCH resource having the same time-frequency domain, and indicates the HARQ feedback and the potential collision indication after the base sequence undergoes a cyclic shift.

[0038] In one embodiment, the transmitting unit transmits the HARQ feedback over a PSFCH resource of a first frequency domain and transmits the potential collision indication over a PSFCH resource of a second frequency domain.

[0039] In one embodiment, the PSFCH resource of the second frequency domain has the same time domain resource as the PSFCH resource of the second frequency domain.

[0040] In one embodiment, the transmitting unit transmits the HARQ feedback at a first time and transmits the potential collision indication at a second time that is earlier than the first time.

[0041] In one embodiment, the communications device further includes a receiving unit configured to obtain first indication information indicating a PSFCH resource to be used for transmitting the HARQ feedback and second indication information indicating a transmission of a PSFCH resource to be used for transmitting the potential collision indication.

[0042] In one embodiment, the first indication information and the second indication information are carried in Radio Resource Control (RRC) signaling.

[0043] In one embodiment, the time interval between the time a potential collision indication is sent to the second user device and the time a resource collision is about to occur at the second network device is determined by a time interval threshold. End It is.

[0044] In one embodiment, the time interval threshold is determined based on Radio Resource Control (RRC) signaling.

[0045] According to a fourth aspect of an embodiment of the present disclosure, there is provided a communication device, which is applied to a second user device, the communication device comprising: The present invention includes a receiving unit configured to receive a potential collision indication transmitted from a first user device, the potential collision indication indicating that a resource collision is about to occur in a reserved resource on which a second user device is to perform data transmission, and a processing unit configured to perform resource selection based on the potential collision indication.

[0046] In one embodiment, the unit receives a potential collision indication transmitted from a first user device using a physical sidelink feedback channel (PSFCH) resource mapped by a first physical sidelink shared channel (PSSCH) transmission resource, where the first PSSCH is a PSSCH in a slot in which a first physical sidelink control channel (PSCCH) is present, and where the first PSCCH is a PSCCH indicating reserved time-frequency resources for a next PSSCH transmission.

[0047] In one embodiment, the receiving unit receives Hybrid Automatic Repeat Request (HARQ) feedback via the PSFCH resource.

[0048] In one embodiment, the receiving unit receives the HARQ feedback and the potential collision indication via a first PSFCH format.

[0049] In one embodiment, the receiving unit receives the HARQ feedback and the potential collision indication over a PSFCH resource that is the same in time-frequency domain.

[0050] In one embodiment, the receiving unit receives a base sequence using a PSFCH resource having the same time-frequency domain, and determines the HARQ feedback and the potential collision indication based on the base sequence after a cyclic shift.

[0051] In one embodiment, the receiving unit receives the HARQ feedback via a PSFCH resource of a first frequency domain and receives the potential collision indication via a PSFCH resource of a second frequency domain.

[0052] In one embodiment, the PSFCH resource of the second frequency domain has the same time domain resource as the PSFCH resource of the second frequency domain.

[0053] In one embodiment, the receiving unit receives the HARQ feedback at a first time and receives the potential collision indication at a second time that is earlier than the first time.

[0054] In one embodiment, the receiving unit is further configured to obtain first indication information indicating a PSFCH resource to be used for receiving the HARQ feedback and second indication information indicating a PSFCH resource to be used for receiving the potential collision indication.

[0055] In one embodiment, the first indication information and the second indication information are carried in Radio Resource Control (RRC) signaling.

[0056] In one embodiment, the time interval between receiving a potential collision indication and a time when a resource collision is about to occur for the second user device is determined by a time interval threshold. End It is.

[0057] In one embodiment, the time interval threshold is determined based on Radio Resource Control (RRC) signaling.

[0058] According to a fifth aspect of an embodiment of the present disclosure, there is provided a communication device including a processor and a memory for storing instructions executable by the processor, wherein the processor is configured to execute the communication method described in the first aspect or any one of the first aspects.

[0059] According to a sixth aspect of an embodiment of the present disclosure, there is provided a communication device, the communication device including a processor and a memory for storing instructions executable by the processor, wherein the processor is configured to perform the communication method described in the second aspect or any one of the second aspects.

[0060] According to a seventh aspect of an embodiment of the present disclosure, a non-transitory computer-readable storage medium is provided, the instructions of which, when executed by a processor, enable a user device to perform the communication method described in the first aspect or any one of the first aspects.

[0061] According to an eighth aspect of an embodiment of the present disclosure, a non-transitory computer-readable storage medium is provided, the instructions of which, when executed by a processor, enable a user device to perform the communication method described in the second aspect or any one of the second aspects. Effect of the Invention

[0062] The technical solutions provided in the embodiments of the present disclosure may include the following beneficial effects: when determining that a resource collision is about to occur on the reserved resources for data transmission, sending a potential collision indication to the second user device, and realizing an indication of whether a resource collision occurs on the reserved resources for data transmission;

[0063] It should be noted that the above general description and the following detailed description are merely illustrative and explanatory and do not limit the present disclosure. [Brief description of the drawings]

[0064] The drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification serve to explain the principles of the present disclosure. [Figure 1] 1 is a schematic diagram of a direct connect communication system according to one exemplary embodiment; [Diagram 2] FIG. 2 is a schematic diagram of a resource collision occurring on reserved resources as illustrated by an exemplary embodiment; [Diagram 3] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 4] FIG. 13 is a schematic diagram of PSFCH resources used to transmit a potential collision indication as shown in accordance with an exemplary embodiment. [Diagram 5] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 6] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 7] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 8] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 9] FIG. 1 is a schematic diagram of distinguishing HARQ feedback and potential collision indications by a cycle shift as shown by an exemplary embodiment of the present disclosure. [Figure 10] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 11] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 12] FIG. 2 is a schematic diagram of independently configuring resources for potential collision indication and resources for HARQ feedback by RRC signaling as shown in one exemplary embodiment; [Figure 13] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 14] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 15] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 16] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 17]4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 18] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 19] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 20] 4 is a flowchart of a communication method according to an exemplary embodiment. [Figure 21] 1 is a block diagram of a communication device according to an exemplary embodiment; [Figure 22] 1 is a block diagram of a communication device according to an exemplary embodiment; [Diagram 23] FIG. 2 is a block diagram of an apparatus for communication as illustrated by an exemplary embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0065] Exemplary embodiments will now be described in detail, examples of which are illustrated in the drawings. Where the following description refers to the drawings, the same numerals in different drawings represent the same or similar elements unless otherwise stated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure, as detailed in the appended claims.

[0066] The communication method provided in the embodiment of the present disclosure can be applied to the direct connection communication system shown in Fig. 1. As shown in Fig. 1, in a scene where direct connection communication is performed between directly connected communication devices, a network device sets various transmission parameters for data transmission to the directly connected communication device 1. The directly connected communication device 1, the directly connected communication device 2, and the directly connected communication device 3 perform direct connection communication. There may be an obstacle between the directly connected communication device 2 and the directly connected communication device 3. The link for communication between the network device and the directly connected communication device is an up-down link, and the link between the directly connected communication device and the directly connected communication device is a sidelink.

[0067] In the present disclosure, the communication scene in which the direct connection communication device directly communicates may be a vehicle wireless communication technology (Vehicle to Everything, V2X) business scene. Here, V represents an in-vehicle device, and X represents any object that interacts with the in-vehicle device. Currently, X mainly includes in-vehicle devices, handheld devices, roadside infrastructure, and networks. Information patterns of V2X interactions include interactions between in-vehicle devices (Vehicle to Vehicle, V2V), between in-vehicle devices and roadside devices (Vehicle to Infrastructure, V2I), between in-vehicle devices and handheld devices (Vehicle to Pedestrian, V2P), and between in-vehicle devices and networks (Vehicle to Network, V2N).

[0068] With the development of next-generation 5G mobile communication technology, 3GPP Rel-16 uses 5G NR technology to realize support for new V2x communication services and scenarios, such as Vehicles Platooning, Extended Sensors, Advanced Driving, Remote Driving, etc. Overall, 5G V2x sidelink can provide higher communication speeds, shorter communication latency, and more reliable communication quality.

[0069] The communication scene in which direct communication is performed between directly connected communication devices may be a communication scene from a terminal to a terminal (Device to Device, D2D). In the embodiment of the present disclosure, the directly connected communication devices that directly communicate may include various handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, and various forms of user devices (User Equipment, UE), mobile stations (Mobile Stations, MS), terminals, terminal devices, etc. For ease of explanation, the embodiment of the present disclosure will be described below with an example in which the directly connected communication device is a user device.

[0070] Here, the enhancement of NR Sidelink can improve the reliability of transmission and reduce delay. In the enhancement of NR Sidelink, in the form of enhancing Mode 2 resource allocation, the 3GPP working group concluded that it is necessary to consider a method of supporting resource selection between user devices. In this method, two user devices are specified, for example, user device A is an auxiliary user device of user device B that needs to perform resource selection for data transmitted from itself. Here, user device A determines a resource set and transmits it to user device B through the mode 2 scheme, and user device B considers the resource set transmitted to user device A when performing resource selection, that is, it can be understood that user device B performs resource selection using the auxiliary resource set support mechanism. Here, user device B can transmit data to user device A and / or other user devices.

[0071] In the resource allocation method of mode 2, resources are selected by a resource sensing manner, and the user device determines a candidate resource set by decoding a demodulation reference signal (DMRS) measurement of sidelink control information (SCI) and a physical sidelink shared channel (PSSCH). However, due to a half-duplex problem, when user device B transmits SCI, it cannot receive SCI of other user devices (e.g., user device C) in the same slot, and the time-frequency resources reserved by user device B and the time-frequency resources reserved by other user devices UE overlap, that is, the information fields of the time resource assignment and frequency resource assignment carried in the SCI of user device B and other user devices are the same, which causes resource collision to occur in the reserved resources for data transmission by user devices, i.e., pre-collision.

[0072] FIG. 2 shows a schematic diagram of a resource collision occurring in a reserved resource. As shown in FIG. 2, in sub-channel 1, UEA decodes the reserved resource acquired from the SCI of UEB, decodes the SCI of UEC, and finds that resource overlap occurs in the acquired reserved resources of UEB and UEC. When UEB transmits data, a resource collision occurs using the overlapped time-frequency resource. In the related technology, UEA can detect the overlap in the reserved resource in each SCI of UEB and UEC, i.e., can determine that a resource collision occurs in the reserved resource for UEB to transmit data.

[0073] In order to achieve resource allocation enhancement, it is necessary to reduce the occurrence probability of pre-collision. An embodiment of the present disclosure provides a communication method, and when a user device determines that a resource collision is about to occur on a reserved resource for data transmission, the communication method sends a potential collision indication to the user device, indicating whether a resource collision is about to occur on the reserved resource for data transmission, to realize the indication of whether a resource collision is about to occur on the reserved resource for data transmission, and the user device can select a resource according to the potential collision indication, thereby reducing the probability that a resource collision is about to occur on the reserved resource for data transmission is selected, and further reducing the occurrence probability of pre-collision.

[0074] In one embodiment, when the UEA, which provides the auxiliary resource set in the above example, detects that the reserved resources in the SCIs of the UEB and the UEC overlap, i.e., determines that a resource collision is about to occur on the reserved resources on which the UEB performs data transmission, the UEA sends a potential collision indication to the UEB, indicating whether a resource collision has occurred on the reserved resources used to perform data transmission to the UEB. After receiving the potential collision indication, the UEB performs resource reselection to reduce the probability of pre-collision occurring.

[0075] In the embodiments of the present disclosure, for ease of explanation, a user device that provides auxiliary resources is referred to as a first user device, and a user device that performs resource selection using the auxiliary resource set assistance mechanism is referred to as a second user device.

[0076] FIG. 3 is a flowchart of a communication method shown by an exemplary embodiment. As shown in FIG. 3, the communication method is used in a first user device and includes the following steps:

[0077] In step S11, in response to determining that a resource collision is about to occur for the reserved resources over which the second user device performs data transmission, a potential collision indication is transmitted to the second user device.

[0078] Here, the potential collision indication indicates that a resource collision is about to occur on the reserved resource for the second user device to perform data transmission.

[0079] In an embodiment of the present disclosure, the first user device can determine whether a resource collision occurs in the reserved resources for data transmission by detecting whether resource overlap occurs in the time domain and / or frequency domain for the reserved resources in the SCIs of the second user device and the other user device. If resource overlap occurs in the time domain and / or frequency domain for the reserved resources in the SCIs of the second user device and the other user device, it can be determined that a resource collision is about to occur in the reserved resources for data transmission by the second user device.

[0080] When the communication method provided in the embodiment of the present disclosure determines that a resource collision is about to occur in the reserved resources for data transmission of the second user device, a potential collision indication is sent to the second user device to realize an indication of whether a resource collision has occurred in the reserved resources for data transmission.

[0081] In one embodiment of the communication method provided in the embodiment of the present disclosure, sending the potential collision indication to the second user device may use a Physical Sidelink Feedback Channel (PSFCH) resource of the current PSSCH transmission resource mapping of the second user device, where the current PSSCH transmission resource of the second user device can be understood to be a corresponding PSSCH transmission resource on a slot in which a reserved time-frequency resource Physical Sidelink Control Channel (PSCCH) used to indicate a next PSSCH transmission of the second user device exists.

[0082] In the embodiment of the present disclosure, for ease of description, the current PSSCH of the second user device is referred to as the first PSSCH, and the PSCCH indicating the reserved time-frequency resource for the next PSSCH transmission is referred to as the first PSCCH.

[0083] 4 is a schematic diagram of PSFCH resources for transmitting a potential collision indication shown by an exemplary embodiment of the present disclosure. Referring to FIG. 4, the PSCCH in Slot 3 can be understood to be the first PSCCH indicating the time-frequency resource for the next PSSCH (PSSCH in Slot 5) transmission. The corresponding PSSCH on the slot in which the first PSCCH in Slot 3 is located can be understood to be the first PSSCH. The PSFCH resource mapped by the first PSSCH transmission resource can be understood to be the PSFCH in Slot 3.

[0084] FIG. 5 is a flowchart of a communication method shown in an exemplary embodiment. As shown in FIG. 5, the communication method is used in a first user device and includes the following steps:

[0085] In step S21, a potential collision indication is transmitted to a second user device using a PSFCH resource mapped by the first PSSCH transmission resource.

[0086] Here, the first PSSCH is a PSSCH in a slot in which the first PSCCH exists, and the first PSCCH is a PSCCH indicating reserved time-frequency resources for a next PSSCH transmission.

[0087] The following describes a process in which a first user device is UEA, a second user device is UEB, and a PSFCH resource mapped by a first PSSCH transmission resource is determined.

[0088] In one example, assuming that UEA is an auxiliary UE and a receiving UE of UEB, one PSSCH resource may be reserved for one PSCCH. The mapping rule between the PSSCH transmission resource and the PSFCH transmission resource is that the slots available for the PSFCH in the resource pool are indicated in the higher layer signaling parameters (e.g., periodic PSFCH resource parameters (period PSFCH resource)), and the higher layer signaling parameters are configured to transmit one PSFCH every several slots. And the slot (Min Time Gap PSFCH), which is the minimum time gap between the PSSCH and the PSFCH, is specified in the higher layer signaling parameters.

[0089] In one embodiment of the present disclosure, a PSFCH candidate resource mapped by a first PSSCH transmission resource is determined according to a mapping rule between the PSSCH transmission resource and the PSFCH transmission resource, and the PSFCH candidate resource is taken as a PSFCH candidate resource for transmitting a potential collision indication, and then Equation 1 can be used to determine a PSFCH transmission resource for transmitting a potential collision indication.

[0090]

number

[0091] In one embodiment of the present disclosure, still referring to FIG. 4, the first user device can obtain a time domain resource assignment and a frequency domain resource assignment by decoding the first stage SCI (the first PSCCH in Slot 3), and further determines the resource of the data transmission of the PSSCH in Slot 5. Therefore, the first user device sends a potential collision indication to the second user device based on the PSFCH resource in Slot 3, to indicate to the second user device that a resource collision is about to occur in the data transmission of the PSSCH in Slot 5.

[0092] In the communication method provided by the embodiment of the present disclosure, the time interval ΔT between the time of sending a potential collision indication to the second user device and the time when a resource collision is about to occur in the second user device is less than or equal to a time interval threshold Tmax End and the second user device receives the potential collision indication and makes a resource selection prior to the time that a resource collision is about to occur for the second user device.

[0093] In one embodiment, the time interval threshold may be indicated by Radio Resource Control (RRC) signaling, and the first user device determines the time interval threshold Tmax based on the RRC signaling. For example, in FIG. 4, UEA transmits a 1-bit potential collision indication using a PSFCH resource corresponding to the current PSSCH resource of UEB, and specifies a maximum time gap Tmax between the feedback potential collision indication and the slot where pre-collision occurs, ΔT (a slot difference between the slot where the potential collision indication is fed back and the slot where pre-collision occurs)≦Tmax by RRC. Here, FIG. 4 can also be understood as a design in which the Min Time Gap Precollison for transmitting the potential collision indication using the PSFCH resource is 0 slot.

[0094] In the related art, the PSFCH resource is used to transmit a 1-bit Hybrid Automatic Repeat Request (HARQ) feedback, so in the embodiments of the present disclosure, the PSFCH resource used to transmit the potential collision indication can be understood to be the PSFCH resource used to transmit the HARQ feedback.

[0095] FIG. 6 is a flowchart of a communication method shown in an exemplary embodiment. As shown in FIG. 6, the communication method is used in a first user device and includes the following steps:

[0096] In step S31, send HARQ feedback and a potential collision indication to a second user device using a PSFCH resource mapped by the first PSSCH transmission resource.

[0097] In an embodiment of the present disclosure, the HARQ feedback transmitted to the second user device using the PSFCH resource mapped by the first PSSCH transmission resource may be a 1-bit HARQ feedback.

[0098] In an embodiment of the present disclosure, the potential collision indication transmitted to the second user device using the PSFCH resource mapped by the first PSSCH transmission resource may be a 1-bit potential collision indication.

[0099] In the embodiments of the present disclosure, the PSFCH carrying the HARQ feedback and the potential collision indication may be understood to be a new PSFCH format, which is referred to as a first PSFCH format in the embodiments of the present disclosure.

[0100] FIG. 7 is a flowchart of a communication method shown in an exemplary embodiment. As shown in FIG. 7, the communication method is used in a first user device and includes the following steps:

[0101] In step S41, the HARQ feedback and potential collision indication are carried via a first PSFCH format.

[0102] In an embodiment of the present disclosure, the HARQ feedback and the potential collision indication are transmitted over a PSFCH resource of a first PSFCH format.

[0103] In embodiments of the present disclosure, the potential collision indication and the HARQ feedback may or may not be multiplexed on the same PSFCH resource.

[0104] In one embodiment, in the communication method provided in the embodiment of the present disclosure, the potential collision indication and the HARQ feedback may be multiplexing PSFCH resources having the same time-frequency domain.

[0105] FIG. 8 is a flowchart of a communication method shown by an exemplary embodiment. As shown in FIG. 8, the communication method is used in a first user device and includes the following steps:

[0106] In step S51, the HARQ feedback and the potential collision indication are multiplexed and transmitted in the PSFCH resource having the same time-frequency domain.

[0107] In an embodiment of the present disclosure, the potential collision indication may be a 1-bit potential collision indication, and the HARQ feedback may be a 1-bit HARQ feedback.

[0108] The embodiments of the present disclosure can design a new 2-bit PSFCH format that can simultaneously transmit HARQ feedback and potential collision indication, i.e., 1-bit ACK / NACK feedback and 1-bit potential collision indication are carried using the newly designed 2-bit PSFCH format.

[0109] Here, in the embodiment of the present disclosure, in order to distinguish between HARQ feedback and potential collision indication, a cycle shift can be designed to distinguish between HARQ feedback and potential collision indication, that is, the existing 2-bit HARQ feedback mechanism is reused.

[0110] Here, in one embodiment, the base sequence is transmitted using a PSFCH resource with the same time-frequency domain, and the base sequence indicates HARQ feedback and potential collision indication after cyclic shift. In one example, the embodiment of the present disclosure transmits a base sequence with a length of 12 using a PSFCH resource with the same time-frequency domain, and the base sequence can carry information transmitted after cyclic shift. For example, this sequence is mapped to a single Physical Resource Block (PRB) and a single Orthogonal Frequency Division Multiplexing (O FDM) symbol, i.e., 1 bit of potential collision indication and 1 bit of HARQ feedback. Figure 9 is a schematic diagram of distinguishing HARQ feedback and potential collision indication by cyclic shift shown by an exemplary embodiment of the present disclosure. As shown in Figure 9, it rotates in units of π / 2, i.e., there are 4 cyclic shifts. Here, a phase of 0 represents (N, + collision), i.e., NACK feedback and pre-collision have occurred. A phase of π / 2 indicates (N,-collision), i.e., no NACK feedback and pre-collision. A phase of π indicates (ACK,+collision), i.e., ACK feedback and pre-collision. A phase of 3π / 2 indicates (ACK,-collision), i.e., no ACK feedback and pre-collision.

[0111] In another embodiment, in the communication method provided in the embodiment of the present disclosure, the potential collision indication and the HARQ feedback may not multiplex the PSFCH resource.

[0112] Here, the potential collision indication and the HARQ feedback may use the PSFCH resource in a Frequency Division Multiplexing (FDM) manner, for example, the HARQ feedback and the potential collision indication are transmitted on different frequency domain resources.

[0113] For ease of explanation, in the embodiments of the present disclosure, the frequency domain for transmitting HARQ feedback is referred to as the first frequency domain, and the frequency domain for transmitting potential collision indication is referred to as the second frequency domain.

[0114] FIG. 10 is a flowchart of a communication method shown in an exemplary embodiment. As shown in FIG. 10, the communication method is used in a first user device and includes the following steps:

[0115] In step S61, transmit HARQ feedback via a PSFCH resource of a first frequency domain and transmit a potential collision indication via a PSFCH resource of a second frequency domain.

[0116] In the communication method provided by the embodiment of the present disclosure, different frequency domain resources can be set for potential collision indication and HARQ feedback, respectively.

[0117] FIG. 11 is a flowchart of a communication method shown in an exemplary embodiment. As shown in FIG. 11, the communication method is used in a first user device and includes the following steps:

[0118] In step S71, the first instruction information and the second instruction information are obtained.

[0119] Here, the first indication information is used to indicate a PSFCH resource to be used for transmitting HARQ feedback, and the second indication information is used to indicate a PSFCH resource to be used for transmitting a potential collision indication.

[0120] In one embodiment, in the example of the present disclosure, two parameter values ​​may be introduced to indicate the PSFCH resource used to transmit HARQ feedback and the PSFCH resource used to transmit pre-collision.

[0121] In one example, a parameter value sl-PSFCH-HARQ-RB-Set-r16 is introduced to represent resources for HARQ feedback and sl-PSFCH-precollsion-RB-Set-r16 is introduced to represent resources for potential collision indication.

[0122] In the communication method provided by the embodiment of the present disclosure, different frequency domain resources can be configured by RRC for potential collision indication and HARQ feedback, for example, a resource parameter value sl-PSFCH-HARQ-RB-Set-r16 indicating HARQ feedback can be introduced into RRC signaling, and a parameter value sl-PSFCH-precollsion-RB-Set-r16 indicating pre-collision indicator resource can be introduced into RRC signaling.

[0123] It should be understood that in the R16 communication protocol, determining the frequency domain resource to be used for PSFCH transmission among the candidate resources of PSFCH is performed in the frequency domain by a PRB set pre-configured by RRC and indicated by bit mapping. In one scheme, a higher layer parameter sl-PSFCH-RB-Set-r16 BIT STRING(SIZE(10..275)) is used to indicate bit mapping of length 10 to 275. In the communication method provided by the embodiment of the present disclosure, the following two parameter values ​​are introduced to ensure that the criteria for mapping from PSSCH to potential collision indication and HARQ feedback resource are the same.

[0124] The two parameter values ​​are sl-PSFCH-HARQ-RB-Set-r16 BIT STRING (SIZE(10..275)) sl-PSFCH-precollsion-RB-Set-r16 BIT STRING(SIZE(10..275)).

[0125] In the communication method provided by the embodiment of the present disclosure, the PSFCH resource of the second frequency domain and the PSFCH resource of the second frequency domain have the same time domain resource.

[0126] Figure 12 is a schematic diagram of independently configuring a resource of a potential collision indication and a resource of a HARQ feedback by the illustrated RRC signaling according to one embodiment. Referring to Figure 12, the PRB with sequence number 3 of the PSFCH resource is used to indicate a resource for transmitting the HARQ feedback. The PRB with sequence number 11 of the PSFCH resource is used to indicate a resource for transmitting the potential collision indication.

[0127] In the communication method provided by the embodiments of the present disclosure, the HARQ feedback and the potential collision indication can be transmitted in different time domains.

[0128] For ease of explanation, in the embodiments of the present disclosure, the time when the HARQ feedback is transmitted is referred to as a first time, and the time when the potential collision indication is transmitted is referred to as a second time.

[0129] FIG. 13 is a flowchart of a communication method shown in an exemplary embodiment. As shown in FIG. 13, the communication method is used in a first user device and includes the following steps:

[0130] In step S81, the HARQ feedback is sent at a first time and the potential collision indication is sent at a second time that is earlier than the first time.

[0131] In the communication method provided by the embodiment of the present disclosure, the resources of the PSFCH are not multiplexed, the HARQ is fed back at time T1, the potential collision indication is fed back at time T2, and the T2 <T1である。

[0132] In one embodiment, the frequency domain resource of the HARQ feedback transmitted at the first time and the frequency domain resource of the HARQ feedback transmitted at the second time may be different.

[0133] In the communication method provided by the embodiment of the present disclosure, different frequency domain resources can be set for potential collision indication and HARQ feedback, respectively.

[0134] In one aspect, the first user device may obtain first indication information and second indication information, where the first indication information is used to indicate a PSFCH resource used to transmit HARQ feedback, and the second indication information is used to indicate a PSFCH resource used to transmit a potential collision indication.

[0135] In one embodiment, in the example of the present disclosure, two parameter values ​​may be introduced to indicate the PSFCH resource used to transmit HARQ feedback and the PSFCH resource used to transmit pre-collision.

[0136] In one example, a parameter value sl-PSFCH-HARQ-RB-Set-r16 is introduced to represent resources for HARQ feedback and sl-PSFCH-precollsion-RB-Set-r16 is introduced to represent resources for potential collision indication.

[0137] In the communication method provided by the embodiment of the present disclosure, different frequency domain resources can be configured by RRC for potential collision indication and HARQ feedback, for example, a resource parameter value sl-PSFCH-HARQ-RB-Set-r16 indicating HARQ feedback can be introduced into RRC signaling, and a parameter value sl-PSFCH-precollsion-RB-Set-r16 indicating pre-collision indicator resource can be introduced into RRC signaling.

[0138] In the embodiment of the present disclosure, since the PSSCH needs to be decoded before transmitting the HARQ feedback, a Cyclic Redundancy Check (CRC) also needs to be completed until the data is correctly decoded. However, the detection of whether a pre-collision occurs is determined by decoding the first stage SCI, and the time when the pre-collision is detected is earlier than the time when the data decoding is completed. Therefore, the time when the potential collision indication is transmitted is set earlier than the time when the HARQ feedback is transmitted. Furthermore, in the communication method provided by the embodiment of the present disclosure, the communication efficiency can be improved by separately feeding back the HARQ and the potential collision indication at different times.

[0139] A communication method provided by an embodiment of the present disclosure includes, when a first user device determines that a resource collision is about to occur in a reserved resource for data transmission, sending a potential collision indication to a second user device, thereby realizing an indication of whether a resource collision has occurred in the reserved resource for data transmission.

[0140] In an embodiment of the present disclosure, a first user device may transmit a potential collision indication to a second user device, and the second user device may receive the potential collision indication transmitted from the first user device and reselect resources based on the potential collision indication to reduce the probability of a collision occurring.

[0141] FIG. 14 is a flowchart of a communication method shown by an exemplary embodiment. As shown in FIG. 14, the communication method is used in a second user device, and includes the following steps:

[0142] In step S91, a potential collision indication sent by a first user device is received.

[0143] The potential collision indication is used to indicate that a resource collision is about to occur on the reserved resource for the second user device to perform data transmission.

[0144] In step S92, a resource selection is made based on the potential conflict indication.

[0145] In an embodiment of the present disclosure, the second user device receives the potential collision indication, and performs resource reselection based on the received potential collision indication to avoid the occurrence of pre-collision. For example, the resource selected by the resource reselection of the second device may be different from the reserved resource where the resource collision is about to occur.

[0146] FIG. 15 is a flowchart of a communication method shown by an exemplary embodiment. As shown in FIG. 15, the communication method is used in a second user device, and includes the following steps:

[0147] In step S101, receive a potential collision indication transmitted by a first user device using a PSFCH resource mapped by a first PSSCH transmission resource.

[0148] Here, the first PSSCH is a PSSCH in a slot in which the first PSCCH exists, and the first PSCCH is a PSCCH indicating reserved time-frequency resources for a next PSSCH transmission.

[0149] In the communication method provided by the embodiment of the present disclosure, the time interval ΔT between the time when a potential collision indication is sent to the second user device and the time when a resource collision is about to occur in the second user device is less than or equal to a time interval threshold Tmax End , whereby the second user device receives the potential collision indication and makes a resource selection prior to the time that a resource collision is about to occur for the second user device.

[0150] FIG. 16 is a flowchart of a communication method shown according to an exemplary embodiment. As shown in FIG. 16, the communication method is used in a second user device and includes the following steps:

[0151] In step S111, receive HARQ feedback and a potential collision indication using a PSFCH resource mapped by the first PSSCH transmission resource.

[0152] In an embodiment of the present disclosure, the HARQ feedback received using the PSFCH resource mapped by the first PSSCH transmission resource may be a 1-bit HARQ feedback.

[0153] In an embodiment of the present disclosure, the potential collision indication received using the PSFCH resource mapped by the first PSSCH transmission resource may be a 1-bit potential collision indication.

[0154] In the embodiment of the present disclosure, the PSFCH that receives the HARQ feedback and the potential collision indication can be understood to be a new PSFCH format. In the embodiment of the present disclosure, the new PSFCH format corresponding to the new PSFCH is referred to as a first PSFCH format.

[0155] FIG. 17 is a flowchart of a communication method shown according to an exemplary embodiment. As shown in FIG. 17, the communication method is used in a second user device and includes the following steps:

[0156] In step S121, receive HARQ feedback and a potential collision indication via a first PSFCH format.

[0157] In embodiments of the present disclosure, the potential collision indication and the HARQ feedback may or may not be multiplexed on the same PSFCH resource.

[0158] In one embodiment, in the communication method provided in the embodiment of the present disclosure, the potential collision indication and the HARQ feedback may be multiplexing PSFCH resources having the same time-frequency domain.

[0159] FIG. 18 is a flowchart of a communication method shown in an exemplary embodiment. As shown in FIG. 18, the communication method is used in a second user device and includes the following steps:

[0160] In step S131, receive HARQ feedback and a potential collision indication via a PSFCH resource having the same time-frequency domain.

[0161] In one embodiment, the base sequence is received using the same time-frequency domain PSFCH resource, and the HARQ feedback and potential collision indication are determined based on the base sequence after circular shifting.

[0162] In another embodiment, in the communication method provided by the embodiment of the present disclosure, the potential collision indication and the HARQ feedback may not multiplex the PSFCH resource.

[0163] Here, the potential collision indication and the HARQ feedback may use the PSFCH resource in an FDM manner, for example, the HARQ feedback and the potential collision indication are received on different frequency domain resources.

[0164] FIG. 19 is a flowchart of a communication method shown by an exemplary embodiment. As shown in FIG. 19, the communication method is used in a second user device and includes the following steps:

[0165] In step S141, receive HARQ feedback via a PSFCH resource of a first frequency domain, and receive a potential collision indication via a PSFCH resource of a second frequency domain.

[0166] In the communication method provided by the embodiment of the present disclosure, different frequency domain resources can be set for potential collision indication and HARQ feedback, respectively.

[0167] In one embodiment, the second user device obtains the first indication information and the second indication information.

[0168] Here, the first indication information is used to indicate a PSFCH resource to be used for transmitting HARQ feedback, and the second indication information is used to indicate a PSFCH resource to be used for transmitting a potential collision indication.

[0169] In one embodiment, in the example of the present disclosure, two parameter values ​​may be introduced to indicate the PSFCH resource used to transmit HARQ feedback and the PSFCH resource used to transmit pre-collision.

[0170] In one example, a parameter value sl-PSFCH-HARQ-RB-Set-r16 is introduced to represent resources for HARQ feedback and sl-PSFCH-precollsion-RB-Set-r16 is introduced to represent resources for potential collision indication.

[0171] In the communication method provided by the embodiment of the present disclosure, different frequency domain resources can be set by RRC for potential collision indication and HARQ feedback, for example, a resource parameter value sl-PSFCH-HARQ-RB-Set-r16 indicating HARQ feedback can be introduced into RRC signaling, and a parameter value sl-PSFCH-precollsion-RB-Set-r16 indicating pre-collision indicator resource can be introduced into RRC signaling.

[0172] It should be understood that in the R16 communication protocol, determining the frequency domain resource to be used for PSFCH transmission among the candidate resources of PSFCH is realized in the frequency domain by a PRB set pre-configured by RRC and indicated by bit mapping. In one scheme, a higher layer parameter sl-PSFCH-RB-Set-r16 BIT STRING(SIZE(10..275)) is used to indicate bit mapping with a length of 10 to 275. In the communication method provided by the embodiment of the present disclosure, the following two parameter values ​​are introduced to ensure that the criteria for mapping from PSSCH to potential collision indication and HARQ feedback resource are the same.

[0173] The two parameter values ​​are sl-PSFCH-HARQ-RB-Set-r16 BIT STRING (SIZE(10..275)) sl-PSFCH-precollsion-RB-Set-r16 BIT STRING(SIZE(10..275)).

[0174] In the communication method provided by the embodiment of the present disclosure, the PSFCH resource of the second frequency domain and the PSFCH resource of the second frequency domain have the same time domain resource, that is, the second user device receives the HARQ feedback and the potential collision indication in the same time domain in a frequency division multiplexed manner.

[0175] In one embodiment, the PSFCH resource of the second frequency domain has a different time domain resource than the PSFCH resource of the second frequency domain.

[0176] FIG. 20 is a flowchart of a communication method shown in an exemplary embodiment. As shown in FIG. 20, the communication method is used in a second user device, and includes the following steps:

[0177] In step S151, HARQ feedback is sent at a first time and a potential collision indication is sent at a second time earlier than the first time.

[0178] In addition, in the embodiments of the present disclosure, the technical implementation related to the process of the first user device sending a potential collision indication and / or HARQ feedback can be applied to the process of the second device in the embodiments of the present disclosure receiving a potential collision indication and / or HARQ feedback sent from the first user device and performing resource selection. Therefore, for some of the technical implementation parts of the process of the second device performing resource selection that are not fully described, please refer to the relevant descriptions in the implementation process of the first user device performing resource selection, and no further description will be given here.

[0179] It should be noted that the communication method provided by the embodiment of the present disclosure is applied to the process of realizing random access parameter configuration in the interaction process between the first user device and the second user device, where the process of the first user device and the second user device interacting to realize resource selection is not described in detail in the embodiment of the present disclosure.

[0180] It should be understood by those skilled in the art that the embodiments of the present disclosure may be used in conjunction with the above-mentioned various embodiments / examples or may be used independently. Whether used alone or together with the above-mentioned examples, the same principles are realized. In the embodiments of the present disclosure, some examples are described in the form of embodiments used together, and of course, those skilled in the art can understand that such examples do not limit the embodiments of the present disclosure.

[0181] Based on the same idea, an embodiment of the present disclosure further provides a communication device.

[0182] It should be noted that the communication device provided by the embodiment of the present disclosure includes a hardware structure and / or a software module for performing each function to realize the above-mentioned functions. With respect to the units and algorithm steps of various examples disclosed by the embodiment of the present disclosure, the embodiment of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can realize the described functions using different methods for each specific application, but such embodiments are not considered to go beyond the scope of the technical solution of the embodiment of the present disclosure.

[0183] 21 is a block diagram of a communication device according to an exemplary embodiment. Referring to FIG. 21, the communication device 100 is applied to a first user device and includes a processing unit 101 and a sending unit 102.

[0184] The processing unit 101 is configured to determine that a resource collision is about to occur in the reserved resources on which the second user device performs data transmission. The sending unit 102 is configured to send a potential collision indication to the second user device indicating that a resource collision is about to occur in the reserved resources on which the second user device performs data transmission in response to the processing unit 101 determining that a resource collision is about to occur in the reserved resources on which the second user device performs data transmission, to the second user device.

[0185] In one embodiment, the transmitting unit 102 transmits the potential collision indication to the second user device using a PSFCH resource mapped by a first PSSCH transmission resource, where the first PSSCH is a PSSCH in a slot in which the first PSCCH resides, and the first PSCCH is a PSCCH indicating a reserved time-frequency resource for a next PSSCH transmission.

[0186] In an embodiment, the transmitting unit 102 is further configured to transmit Hybrid Automatic Repeat Request (HARQ) feedback via the PSFCH resource.

[0187] In one embodiment, the transmitting unit 102 conveys the HARQ feedback and potential collision indication via the first PSFCH format.

[0188] In one embodiment, the transmitting unit 102 multiplexes and transmits the HARQ feedback and the potential collision indication on the same time-frequency domain PSFCH resource.

[0189] In one embodiment, the transmitting unit 102 transmits a base sequence using a PSFCH resource having the same time-frequency domain, and indicates the HARQ feedback and the potential collision indication after the base sequence undergoes a cyclic shift.

[0190] In one embodiment, the transmitting unit 102 transmits the HARQ feedback via a PSFCH resource of the first frequency domain and transmits the potential collision indication via a PSFCH resource of the second frequency domain.

[0191] In one embodiment, the PSFCH resource in the second frequency domain has the same time domain resource as the PSFCH resource in the second frequency domain.

[0192] In one embodiment, the transmitting unit 102 transmits the HARQ feedback at a first time and transmits the potential collision indication at a second time that is earlier than the first time.

[0193] In one embodiment, the communications device 100 further includes a receiving unit 103 configured to obtain first indication information used to indicate a PSFCH resource to be used for transmitting HARQ feedback and second indication information used to indicate a PSFCH resource to be used for transmitting a potential collision indication.

[0194] In one embodiment, the first indication information and the second indication information are carried in RRC signaling.

[0195] In one embodiment, the time interval between the time the potential collision indication is sent to the second user device and the time the second user device is about to experience a resource collision is determined by a time interval threshold. End It is.

[0196] In one embodiment, the time interval threshold is determined based on RRC signaling.

[0197] 22 is a block diagram of a communication device according to an exemplary embodiment. Referring to FIG. 22, the communication device 200 is applied to a second user device and includes a receiving unit 201 and a processing unit 202.

[0198] The receiving unit 201 is configured to receive a potential collision indication sent from a first user device. The potential collision indication indicates that a resource collision is about to occur on a reserved resource on which a second user device performs data transmission. The processing unit 202 is configured to perform resource selection based on the potential collision indication.

[0199] In one embodiment, the receiving unit 201 receives a potential collision indication transmitted from a first user device using a PSFCH resource mapped by a first PSSCH transmission resource, where the first PSSCH is a PSSCH in a slot in which a first PSCCH resides, and the first PSCCH is a PSCCH indicating a reserved time-frequency resource for a next PSSCH transmission.

[0200] In one embodiment, the receiving unit 201 receives HARQ feedback via a PSFCH resource.

[0201] In one embodiment, the receiving unit 201 receives the HARQ feedback and the potential collision indication via a first PSFCH format.

[0202] In one embodiment, the receiving unit 201 receives the HARQ feedback and the potential collision indication over a PSFCH resource that is the same in time-frequency domain.

[0203] In one embodiment, the receiving unit 201 receives a base sequence using a PSFCH resource having the same time-frequency domain, and determines the HARQ feedback and the potential collision indication based on the base sequence after cyclic shift.

[0204] In one embodiment, the receiving unit 201 receives HARQ feedback via a PSFCH resource of a first frequency domain and receives a potential collision indication via a PSFCH resource of a second frequency domain.

[0205] In one embodiment, the PSFCH resource of the second frequency domain and the PSFCH resource of the second frequency domain have the same time domain resource.

[0206] In one embodiment, the receiving unit 201 receives the HARQ feedback at a first time and receives the potential collision indication at a second time that is earlier than the first time.

[0207] In one embodiment, the receiving unit 201 is further configured to obtain first indication information indicating a PSFCH resource used for receiving the HARQ feedback and second indication information indicating a PSFCH resource used for receiving the potential collision indication.

[0208] In one embodiment, the first indication information and the second indication information are carried in RRC signaling.

[0209] In one embodiment, the time interval between the time when the potential collision indication is received and the time when a resource collision is about to occur for the second user device is determined by a time interval threshold. End It is.

[0210] In one embodiment, the time interval threshold is determined based on RRC signaling.

[0211] Regarding the apparatus of the above-mentioned embodiment, the specific manner in which each module executes an operation has been described in detail in the embodiment of this method, and therefore will not be described in detail here.

[0212] 23 is a block diagram of a device 300 for communication shown in an exemplary embodiment. For example, the device 300 may be the first user device or the second user device of the above embodiment. For example, the device 300 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0213] Referring to FIG. 23, the device 300 may include one or more components: a processing component 302, a memory 304, a power component 306, a multimedia component 308, an audio component 310, an input / output (I / O) interface 312, a sensor component 314, and a communication component 316.

[0214] The processing component 302 typically controls the overall operation of the device 300, such as operations related to display, phone calls, data communication, camera operation, and recording operations. The processing component 302 may include one or more processors 320 for executing instructions to complete all or some of the steps of the above methods. The processing component 302 may also include one or more modules to facilitate processing of interactions with other components. For example, the processing component 302 may include a multimedia module to facilitate interaction between the processing component 302 and the multimedia component 308.

[0215] The memory 304 is configured to store various types of data to support operation on the device 300. Examples of these data include instructions for any application programs or methods for operating on the device 300, contact data, phone book data, messages, images, videos, etc. The memory 304 may be implemented by any type of volatile or non-volatile storage device or combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk, or an optical disk.

[0216] The power component 306 provides power for the various components of the device 300. The power component 306 can include a power management system, one or more power sources, and other components related to generating, managing, and allocating power for the device 300.

[0217] The multimedia component 308 includes a screen that provides an output interface between the device 300 and a user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). When the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel may include one or more touch sensors to sense touch, slide, and touch panel gestures. The touch sensor may detect the boundaries of a touch or slide operation as well as the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 308 includes a front camera and / or a back camera. When the device 300 is in an operation mode, such as a photo mode or a video mode, the front camera and / or the back camera may receive external multimedia data. Each front camera and back camera may be a fixed optical lens system or may have a focal length and optical zoom capability.

[0218] The audio component 310 is configured to output and / or input audio signals. For example, the audio component 310 includes a microphone (MIC) configured to receive external audio signals when the device 300 is in an operation mode such as a call mode, a record mode, and a voice recognition mode. The received audio signals may be further stored in the memory 304 or transmitted via the communication component 316. In some embodiments, the audio component 310 further includes a speaker for outputting audio signals.

[0219] The I / O interface 312 provides an interface between the processing component 302 and a peripheral interface module, which may be a keyboard, a click wheel, buttons, etc. These buttons may include, but are not limited to, a home button, volume buttons, a start button, and a lock button.

[0220] The sensor component 314 includes one or more sensors to provide various aspects of status assessment for the device 300. For example, the sensor component 314 can detect the on / off state of the device 300, the relative positioning of components, such as the display and keypad of the device 300, and the sensor component 314 can also detect position changes of the device 300 or components of the device 300, the presence or absence of user contact with the device 300, the orientation or acceleration / deceleration of the device 300, and temperature changes of the device 300. The sensor component 314 can also include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor component 314 can further include an optical sensor, such as a CMOS or CCD image sensor used for imaging applications. In some embodiments, the sensor component 314 can further include an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0221] The communication component 316 is configured to facilitate wired or wireless communication between the device 300 and other devices. The device 300 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 316 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 316 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra-Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0222] In an exemplary embodiment, the apparatus 300 may be implemented by an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic components, one or more applications to perform the above methods.

[0223] In an exemplary embodiment, a non-transitory computer readable storage medium containing instructions, such as a memory 304 containing instructions, may be provided, which may be executed by the processor 320 of the apparatus 300 to complete the method. For example, the non-transitory computer readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device.

[0224] Furthermore, it can be understood that "plurality" in this disclosure means two or more, and other counter words are similar. "And / or" describes the relation between related objects and indicates that three relations can exist. For example, a description of A and / or B can indicate three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " usually indicates that the related objects before and after are in an "or" relation. The singular forms "a," "the," and "the" are also intended to include the plural, unless the context clearly indicates otherwise.

[0225] Further, it can be understood that while terms such as "first," "second," and the like, describe various pieces of information, these pieces of information should not be limited to these terms. These terms are merely used to distinguish between similar types of information and do not imply any particular order or importance. In fact, terms such as "first," "second," and the like can be used completely interchangeably. For example, a first piece of information can be referred to as a second piece of information, and similarly, a second piece of information can be referred to as a first piece of information, without departing from the scope of this disclosure.

[0226] Additionally, although the embodiments of the present disclosure describe operations in a particular order in the figures, these operations should not be construed as requiring that the operations be performed in the particular order shown, or in a serial order, or that all operations be performed to achieve desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0227] Those skilled in the art may easily conceive other implementations of the present disclosure after studying the specification and practicing the invention disclosed in the specification. The present disclosure is intended to cover any modifications, uses or adaptations of the present disclosure, which modifications, uses or adaptations follow the general principles of the present disclosure and include common general knowledge or commonly used technical means in the art that are not disclosed in the present disclosure. The specification and examples are considered to be merely exemplary, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0228] It should be noted that the present disclosure is not limited to the exact structure described above and illustrated in the drawings, and various modifications and variations can be made without departing from the scope of the present disclosure, which is limited only by the scope of the appended claims.

Claims

1. 1. A communication method applied to a first user device, the communication method comprising: in response to determining that a resource collision is about to occur on the reserved resources on which the second user device performs data transmission, transmitting a potential collision indication to the second user device, using a physical sidelink feedback channel (PSFCH) resource mapped by a first physical sidelink shared channel (PSSCH) transmission resource, indicating that a resource collision is about to occur on the reserved resources on which the second user device performs data transmission; transmitting Hybrid Automatic Repeat Request (HARQ) feedback via the PSFCH resource; The step of transmitting the HARQ feedback and the potential collision indication comprises: transmitting the HARQ feedback via a PSFCH resource of a first frequency domain and transmitting the potential collision indication via a PSFCH resource of a second frequency domain. A communication method comprising:

2. the first PSSCH is a PSSCH in a slot in which a first physical sidelink control channel (PSCCH) is present, the first PSCCH being a PSCCH indicating reserved time-frequency resources for a next PSSCH transmission; 2. The communication method according to claim 1 .

3. The HARQ feedback and the potential collision indication: transmitting the HARQ feedback and the potential collision indication via a first PSFCH format; 2. The communication method according to claim 1 .

4. The communication method includes: the potential collision indication is one bit; 2. The communication method according to claim 1 .

5. The PSFCH resource of the first frequency domain has the same time domain resource as the PSFCH resource of the second frequency domain.

2. The communication method according to claim 1 .

6. a first indication information and a second indication information are carried in a radio resource control (RRC) signaling, the first indication information indicating a PSFCH resource to be used for transmitting the HARQ feedback, and the second indication information indicating a PSFCH resource to be used for transmitting the potential collision indication; 6. The communication method according to claim 5.

7. a time interval between a time when a potential collision indication is sent to the second user device and a time when a resource collision is about to occur at the second user device is equal to or greater than a time interval threshold; 2. The communication method according to claim 1 .

8. the time interval threshold is determined based on radio resource control (RRC) signaling.

8. The communication method according to claim 7.

9. A communication method applied to a second user device, the communication method comprising: receiving a potential collision indication transmitted from a first user device using a physical sidelink feedback channel (PSFCH) resource mapped by a first physical sidelink shared channel (PSSCH) transmission resource, the potential collision indication indicating that a resource collision is about to occur on a reserved resource on which a second user device performs data transmission; performing a resource selection based on the potential conflict indication; receiving Hybrid Automatic Repeat Request (HARQ) feedback via the PSFCH resource; The step of receiving the HARQ feedback and the potential collision indication comprises: receiving the HARQ feedback via a PSFCH resource of a first frequency domain and receiving the potential collision indication via a PSFCH resource of a second frequency domain. A communication method comprising:

10. the first PSSCH is a PSSCH in a slot in which a first physical sidelink control channel (PSCCH) is present, the first PSCCH being a PSCCH indicating reserved time-frequency resources for a next PSSCH transmission; 10. The communication method according to claim 9.

11. The HARQ feedback and the potential collision indication: receiving the HARQ feedback and the potential collision indication via a first PSFCH format; 10. The communication method according to claim 9.

12. The communication method includes: the potential collision indication is one bit; 10. The communication method according to claim 9.

13. The PSFCH resource of the first frequency domain has the same time domain resource as the PSFCH resource of the second frequency domain.

10. The communication method according to claim 9.

14. a first indication information and a second indication information are carried in a radio resource control (RRC) signaling, the first indication information indicating a PSFCH resource to be used for receiving the HARQ feedback, and the second indication information indicating a PSFCH resource to be used for receiving the potential collision indication; The communication method according to claim 11 .

15. a time interval between receiving a potential collision indication and a time when a resource collision is about to occur for the second user device is equal to or greater than a time interval threshold; 10. The communication method according to claim 9.

16. the time interval threshold is determined based on radio resource control (RRC) signaling.

16. The communication method according to claim 15.

17. A communication apparatus for application to a first user device, the communication apparatus comprising: a processing unit configured to determine that a resource collision is about to occur on a reserved resource on which a second user device performs data transmission; a transmitting unit configured to, in response to the processing unit determining that a resource collision is about to occur in the reserved resources on which the second user device performs data transmission, transmit to the second user device, using a physical sidelink feedback channel (PSFCH) resource mapped by a first physical sidelink shared channel (PSSCH) transmission resource, a potential collision indication indicating that a resource collision is about to occur in the reserved resources on which the second user device performs data transmission, The transmitting unit is further configured to transmit Hybrid Automatic Repeat Request (HARQ) feedback via the PSFCH resource; The transmitting unit transmits the HARQ feedback via a PSFCH resource of a first frequency region and transmits the potential collision indication via a PSFCH resource of a second frequency region; The PSFCH resource of the first frequency domain has the same time domain resource as the PSFCH resource of the second frequency domain. A communication device comprising:

18. the first PSSCH is a PSSCH in a slot in which a first physical sidelink control channel (PSCCH) is present, the first PSCCH being a PSCCH indicating reserved time-frequency resources for a next PSSCH transmission; 20. The communication device according to claim 17,

19. the transmitting unit conveys the HARQ feedback and the potential collision indication via a first PSFCH format.

20. The communication device according to claim 17,

20. the transmitting unit transmitting the HARQ feedback at a first time and transmitting the potential collision indication at a second time earlier than the first time.

20. The communication device according to claim 19 .

21. A communication apparatus adapted for a second user device, the communication apparatus comprising: a receiving unit configured to receive a potential collision indication transmitted from a first user device using a physical sidelink feedback channel (PSFCH) resource mapped by a first physical sidelink shared channel (PSSCH) transmission resource, the potential collision indication indicating that a resource collision is about to occur on a reserved resource on which a second user device performs data transmission; a processing unit configured to perform a resource selection based on the potential collision indication; The receiving unit receives a hybrid automatic repeat request (HARQ) feedback via the PSFCH resource; The receiving unit receives the HARQ feedback via a PSFCH resource of a first frequency region and receives the potential collision indication via a PSFCH resource of a second frequency region; The PSFCH resource of the first frequency domain has the same time domain resource as the PSFCH resource of the second frequency domain. A communication device comprising:

22. the first PSSCH is a PSSCH in a slot in which a first physical sidelink control channel (PSCCH) is present, the first PSCCH being a PSCCH indicating reserved time-frequency resources for a next PSSCH transmission; 22. A communication device according to claim 21,

23. the receiving unit receives the HARQ feedback and the potential collision indication via a first PSFCH format; 22. The communication device according to claim 21 .

24. the receiving unit receives the HARQ feedback at a first time and receives the potential collision indication at a second time earlier than the first time.

24. The communication device according to claim 23.

25. A communication device, comprising: A processor; and a memory for storing processor-executable instructions; The processor is configured to execute a communication method according to any one of claims 1 to 8. A communication device comprising:

26. A communication device, comprising: A processor; and a memory for storing processor-executable instructions; The processor is configured to execute a communication method according to any one of claims 9 to 16. A communication device comprising:

27. A non-transitory computer-readable storage medium, comprising: The instructions of the storage medium, when executed by a processor, enable a user device to carry out the communication method according to any one of claims 1 to 8. A non-transitory computer-readable storage medium comprising:

28. A non-transitory computer-readable storage medium, comprising: The instructions of the storage medium, when executed by a processor, enable a user device to carry out the communication method according to any one of claims 9 to 16. A non-transitory computer-readable storage medium comprising:

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