WO2021027804A1

WO2021027804A1 - Communication method and apparatus, and computer-readable storage medium

Info

Publication number: WO2021027804A1
Application number: PCT/CN2020/108377
Authority: WO
Inventors: 黎超; 张兴炜; 温容慧; 张莉莉
Original assignee: 华为技术有限公司
Priority date: 2019-08-13
Filing date: 2020-08-11
Publication date: 2021-02-18
Also published as: CN112399487B; CN112399487A

Abstract

A communication method and apparatus, and a computer readable storage medium. The method comprises: a first device receives first control information, the first control information comprising indication information of a reserved resource; according to the first control information, determining whether the reserved resource corresponding to the indication information is a candidate resource; and sending a first data packet according to the candidate resource. In the embodiments of the present invention, the reliability of data transmission may be improved.

Description

Communication method, device and computer readable storage medium

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910743816.6, and the application name is "a communication method, device and computer-readable storage medium" on August 13, 2019, the entire content of which is by reference Incorporated in this application.

Technical field

The embodiments of the present invention relate to the field of communication technology, and in particular, to a communication method, device, and computer-readable storage medium.

Background technique

In the Internet of Vehicles (new radio, NR) vehicle and everything (vehicle to everything, V2X) for communication, when defining the requirements of the system design, it is clearly required that part of the business needs to meet 99.99% or 99.999% of the communication reliability. One of the key technologies in NR V2X is to support the transmission mode for terminal equipment to independently select resources in a non-network environment. In this transmission mode, transmission resources selected by different terminal devices may conflict. Once a conflict occurs, communication reliability is difficult to guarantee. Therefore, how to ensure the reliability of data transmission in the self-selected resource mode has become an urgent technical problem to be solved.

Summary of the invention

The embodiment of the invention discloses a communication method, a device and a computer-readable storage medium, which are used to improve the reliability of data transmission.

In a first aspect, a communication method is disclosed. A first device receives first control information including indication information of reserved resources, determines whether the reserved resource corresponding to the indication information is a candidate resource according to the first control information, and sends the first control information according to the candidate resource. data pack. Since the reserved resource in the candidate resource is determined according to the control information corresponding to the reserved resource, it can be guaranteed that the reserved resource in the candidate resource is a reserved resource that is released or a reservation that has little impact on the communication of the first device Resources, which can improve the reliability of data transmission.

As a possible implementation manner, the first device may first determine the transmission resource from the candidate resources, and then use the transmission resource to send the first data packet, which can ensure that the resource used to transmit the data packet is an available resource, thereby improving the efficiency of information transmission. reliability.

As a possible implementation manner, the indication information may be information about reserved resources fed back based on a hybrid automatic repeat request (HARQ). Optionally, the HARQ feedback may be feedback for unicast or multicast.

As a possible implementation manner, the indication information may be the information about the reserved resources for the retransmission of the first transmission, or the information about the reserved resources for the second retransmission for the first retransmission, or the second retransmission. The information about the reserved resources for the initial transmission or retransmission of the data packet for the initial transmission of the third data packet may also be the information about the reserved resources for the transmission based on HARQ feedback to the transmission of blind transmission, or it may be based on the blind transmission. The information of the reserved resources for transmission based on HARQ feedback is transmitted.

As a possible implementation manner, the first control information may also include information about the time slot where the reserved resource is located. When the first device does not detect the second control information and/or the second control information in the time slot where the reserved resource is located When the data packet is scheduled, the first device can determine that the reserved resource corresponding to the indication information is a candidate resource. When the first device detects the second control information and/or the data scheduled by the second control information in the time slot where the reserved resource is located Packet, the first device may further determine the reserved resource corresponding to the indication information and/or the indication information included in the second control information according to the detected first control information and/or the signal quality of the data packet scheduled by the first control information Whether the reserved resource of is a candidate resource. Wherein, the resource occupied by the second control information and/or the data packet scheduled by the second control information is the reserved resource corresponding to the indication information. When there is no corresponding transmission on the reserved resource corresponding to the indication information, the reserved resource is considered to be an invalid reserved resource, the first device can use the reserved resource and the use of the reserved resource will not affect the reliability of data transmission Therefore, the candidate resource can be determined as a candidate resource, thereby increasing the selection range of available resources of the first device without affecting the reliability of data transmission by the first device.

As a possible implementation manner, when the detected signal quality of the first control information and/or the data packet scheduled by the first control information is less than the first threshold, the first device may determine the reserved resource and/or corresponding to the indication information Or the reserved resources corresponding to the indication information included in the second control information belong to candidate resources. It can be seen that although the first device detects the second control information and/or the data packet scheduled by the second control information in the time slot where the reserved resource is located, it is due to the detected first control information and/or the data packet scheduled by the first control information. The signal quality of the data packet is less than the first threshold, indicating that the use of the reserved resource has a small impact on the data transmission of the first device. The candidate resource can be determined as a candidate resource, thereby increasing the selection range of available resources for the first device. The impact on the data transmission reliability of the first device can be reduced.

As a possible implementation manner, the first device may determine one or more reserved resources corresponding to the smallest signal quality among the reserved resources of the first control information corresponding to the indication information and/or the data packets scheduled by the first control information Belongs to candidate resources. It can be seen that although the first device detects the second control information and/or the data packets scheduled by the second control information on the time slot where the reserved resources are located, the signal quality corresponding to the one or more reserved resources is low, indicating The use of the one or more reserved resources has little impact on the data transmission of the first device. The one or more reserved resources can be determined as candidate resources, so that the selection range of the first device resources can be increased while reducing the impact. The influence of data transmission reliability of the first device.

As a possible implementation manner, the first control information may also include location information of the first control information sending device, and the first device may determine the distance between the first device and the sending device according to the location information, and then determine the indication information One or more reserved resources with the largest corresponding distance among the corresponding reserved resources belong to candidate resources. It can be seen that due to the long distance between the one or more reserved resources and the first device, the use of the one or more reserved resources will have less impact on the data transmission of the first device. The reserved resources are determined as candidate resources, so that while increasing the selection range of the resources of the first device, the impact on the reliability of data transmission of the first device can be reduced.

As a possible implementation manner, the first device may measure the signal quality of the first control information and/or the data packets scheduled by the first control information, and then may determine the one or the smallest signal quality corresponding to the reserved resources corresponding to the indication information. Multiple reserved resources belong to candidate resources. It can be seen that since the signal quality of the one or more reserved resources is relatively small, the use of the one or more reserved resources has less impact on the data transmission of the first device, and the one or more reserved resources can be determined as Candidate resources, thereby increasing the selection range of the resources of the first device and reducing the impact on the reliability of data transmission of the first device.

As a possible implementation manner, the first control information may also include location information of the first control information sending device. The first device can determine the distance between the first device and the sending device according to the location information, and can measure the first control information. Information and/or the signal quality of the data packet scheduled by the first control information, when the distance is greater than the first distance threshold and/or the signal quality is less than the second threshold, it may be determined that the reserved resource corresponding to the indication information is a candidate resource. It can be seen that the signal quality of the detected first control information and/or the data packet scheduled by the first control information is less than the second threshold, and/or the distance between the first device and the sending device of the first control information is greater than the first The distance threshold. The use of these reserved resources has little impact on the data transmission of the first device. These candidate resources can be determined as candidate resources, so that the selection range of the first device resources can be increased while reducing the reliability of data transmission to the first device. The impact of sex. The first distance threshold is a preset threshold or M times the minimum communication distance required by the first data packet, and M is an integer greater than or equal to 1.

As a possible implementation manner, the first device can measure the signal quality corresponding to the indication information on the physical layer feedback channel, and when the signal quality is less than the third threshold or within the threshold range, it can determine that the reserved resource corresponding to the indication information is a candidate Resources. It can be seen that when the signal quality corresponding to the indication information on the measured physical layer feedback channel is less than the third threshold or within the threshold range, it indicates that the feedback is a positive acknowledgement (ACK), which indicates that the data transmission is successful, and the corresponding prediction can be determined. The reserved resource is an invalid reservation, and the reserved resource can be determined as a candidate resource, so that the first device resource selection range is increased without affecting the reliability of data transmission by the first device. The first device may determine that one or more reserved resources with the smallest signal quality among the reserved resources corresponding to the indication information are candidate resources. Since the signal quality on the physical layer feedback channel corresponding to the one or more reserved resources is low, The use of the one or more reserved resources has little impact on the data transmission of the first device. The one or more reserved resources can be determined as candidate resources, so that the selection range of the first device resources can be increased while reducing the impact. The influence of data transmission reliability of the first device.

As a possible implementation manner, the first device obtains the probability, and determines that the reserved resource corresponding to the indication information belongs to the candidate resource according to the probability. The probability is configured by signaling, or pre-configured, or according to the degree of channel congestion and/or service. The properties are determined. Optionally, the attributes of the service may include the priority of the service, the period of the service, the size of the data packet of the service, the delay requirement of the service, the type of the service corresponding message, etc. It is determined by probability that the reserved resources belong to the candidate resources, and the statistically optimal resource utilization efficiency can be obtained from the system perspective and the possibility of conflicts can be reduced.

As a possible implementation manner, the probability is positively correlated with the degree of channel congestion, that is, the more severe the signal congestion, the greater the probability. When the channel is relatively idle, even if the reserved resource is not determined as a candidate reservation, the first device can still select enough idle resources; when the channel is relatively congested, it means that there are fewer idle resources available and only select from idle resources The resources may be insufficient, and some reserved resources need to be determined as candidate resources.

As a possible implementation manner, the reserved resource may be the first reserved resource for HARQ retransmission or the second reserved resource for blind transmission. Blind transmission is transmission without HARQ feedback.

As a possible implementation manner, the first device may measure the signal quality of the first control information and/or the data packets scheduled by the first control information, and when the reserved resource corresponding to the indication information is the first reserved resource, it may determine Among the reserved resources corresponding to the indication information, the reserved resources whose signal quality is less than the fourth threshold are candidate resources; when the reserved resource corresponding to the indication information is the second reserved resource, the signal quality of the reserved resources corresponding to the indication information can be determined The reserved resources less than the fifth threshold are candidate resources. It can be seen that the resources corresponding to the signal quality conditions can be selected as candidate resources from the reserved resources corresponding to the first reserved resources and the reserved resources corresponding to the second reserved resources, respectively, according to independent thresholds.

As a possible implementation manner, when the ratio of the current candidate resources to the total resources is less than the sixth threshold, the first device may determine that the resources in the first resource set whose signal quality is less than the sum of the fourth threshold and the first step length belong to Candidate resources, it can be determined that the resources in the second resource set whose signal quality is less than the sum of the fifth threshold and the second step size are candidate resources. Among them, the first resource set is the set of the first reserved resources among the reserved resources corresponding to the indication information except for the current candidate resources, and the second resource set is the set of reserved resources corresponding to the indication information except those belonging to the current Resources other than the candidate resources are the set of second reserved resources. It can be seen that when the size of the candidate resource determined only according to the fourth threshold and the fifth threshold is not enough, the threshold can be increased in different steps to separate the reserved resources for HARQ retransmission and the reservation for blind transmission. Candidate resources can be added to resources, so that resources of different magnitudes can be added.

As a possible implementation manner, the first device may determine that the second reserved resource among the reserved resources corresponding to the indication information is a candidate resource, and/or may determine that the reserved resource corresponding to the indication information is the second reserved resource. A reserved resource with a reserved resource and a signal quality less than the seventh threshold is a candidate resource, and/or it can be determined that the reserved resources corresponding to the indication information are the first reserved resource, the signal quality is greater than or equal to the seventh threshold, and the distance is greater than The reserved resources of the second distance threshold are candidate resources. The signal quality is the first control information measured by the first device and/or the signal quality of the data packet scheduled by the first control information, and the distance is the distance between the first device and the sending device determined according to the location information. It is possible to determine the reserved resources that have less impact on the data transmission reliability of the first device as candidate resources as much as possible, thereby reducing interference and avoiding resource waste.

As a possible implementation, the first device can update the value of the counter. When the updated value of the counter is equal to the set value, resource selection or reselection can be performed; when the updated value of the counter is not equal to the set value , The fourth data packet can be sent using the candidate resource. It can be seen that the value of the counter can be used to determine whether to trigger the first device to select or reselect resources.

As a possible implementation manner, the first device may receive feedback information for the first data packet, and when the feedback information is information indicating that the first data packet is successfully transmitted, the value of the counter may be updated, and when the feedback information is used When the information indicating that the transmission of the first data packet fails, the value of the counter can be kept unchanged. It can be seen that for HARQ-based data, it can be determined whether to update the value of the counter according to the feedback information.

As a possible implementation manner, when the fourth data packet is a data packet based on HARQ retransmission, the first device can select or reselect resources according to the first probability value. When the fourth data packet is a data packet based on blind transmission In the case of data packets, the first device can select or reselect resources according to the second probability value. It can be seen that the probability of resource selection or retransmission may be different for different types of data packets.

As a possible implementation manner, the counter may include a first counter and a second counter. When the first data packet is a data packet retransmitted based on HARQ, the first device may update the value of the first counter. When the data packet is blindly transmitted, the first device can update the value of the second counter. It can be seen that different types of data can maintain different counters respectively.

As a possible implementation manner, the counter may include a first counter, a second counter, and a third counter. When the first data packet is a unicast service data packet, the first device may update the value of the first counter; When a data packet is a data packet of a multicast service, the first device may update the value of the second counter; when the first data packet is a data packet of a broadcast service, the first device may update the value of the third counter. It can be seen that different types of data can maintain different counters respectively.

As a possible implementation manner, the counter may include a first counter and a second counter. When the first data packet is a periodic service data packet, the first device may update the value of the first counter; when the first data packet is In the case of a non-periodic service data packet, the first device may update the value of the second counter. It can be seen that different types of data can maintain different counters respectively.

A second aspect discloses a communication device, including:

A first receiving unit, configured to receive first control information, where the first control information includes indication information for reserved resources;

A determining unit, configured to determine whether the reserved resource corresponding to the indication information belongs to a candidate resource according to the first control information;

The sending unit is configured to send the first data packet according to the candidate resource.

As a possible implementation manner, the sending unit is specifically configured to:

Determining a transmission resource from the candidate resources;

Sending the first data packet using the transmission resource.

As a possible implementation manner, the indication information is information of reserved resources based on HARQ feedback.

As a possible implementation manner, the indication information is the information of the reserved resources for the retransmission of the first transmission, or the information of the reserved resources for the second retransmission of the first retransmission, or the information of the second data packet. Initial transmission or retransmission of the reserved resource information for the initial transmission of the third data packet, or the reserved resource information for the transmission based on HARQ feedback to the transmission of blind transmission, or the transmission based on blind transmission to the transmission based on HARQ feedback Information about reserved resources.

As a possible implementation manner, the first control information further includes information about the time slot where the reserved resource is located, and the determining unit is specifically configured to:

When the second control information and/or the data packet scheduled by the second control information is not detected in the time slot where the reserved resource is located, determining that the reserved resource corresponding to the indication information belongs to the candidate resource, and The second control information and/or the resources occupied by the data packets scheduled by the second control information are reserved resources corresponding to the indication information; or,

When the second control information and/or the data packet scheduled by the second control information is detected on the time slot where the reserved resource is located, according to the detected first control information and/or the first control information The signal quality of the scheduled data packet determines whether the reserved resource corresponding to the indication information and/or the reserved resource corresponding to the indication information included in the second control information is a candidate resource.

As a possible implementation manner, the determining unit determines the reserved resources and/or reserved resources corresponding to the indication information according to the detected first control information and/or the signal quality of the data packets scheduled by the first control information. Or whether the reserved resource corresponding to the indication information included in the second control information is a candidate resource includes:

When the detected signal quality of the first control information and/or the data packet scheduled by the first control information is less than the first threshold, determine the reserved resource corresponding to the indication information and/or the second control The reserved resource corresponding to the indication information included in the information belongs to the candidate resource.

It is determined that one or more reserved resources with the smallest signal quality of the corresponding first control information and/or data packets scheduled by the first control information in the reserved resources corresponding to the indication information belong to the candidate resources.

As a possible implementation manner, the first control information further includes location information of the first control information sending device, and the determining unit is specifically configured to:

Determine the distance between the first device and the sending device according to the location information;

It is determined that one or more reserved resources with the largest corresponding distance among the reserved resources corresponding to the indication information belong to the candidate resources.

As a possible implementation manner, the determining unit is specifically configured to:

Measuring the signal quality of the first control information and/or the data packets scheduled by the first control information;

It is determined that one or more reserved resources with the smallest signal quality corresponding to the reserved resources corresponding to the indication information belong to the candidate resources.

When the distance is greater than the first distance threshold and/or the signal quality is less than the second threshold, it is determined that the reserved resource corresponding to the indication information belongs to the candidate resource, and the first distance threshold is a preset The threshold or M times the minimum communication distance required by the first data packet, where M is an integer greater than or equal to 1.

Measuring the signal quality corresponding to the indication information on the physical layer feedback channel;

When the signal quality is less than a third threshold or within a threshold range, it is determined that the reserved resource corresponding to the indication information belongs to the candidate resource; or,

It is determined that one or more reserved resources with the smallest signal quality among the reserved resources corresponding to the indication information belong to the candidate resources.

Probability of acquisition

It is determined according to the probability that the reserved resource corresponding to the indication information belongs to the candidate resource, and the probability is determined by signaling configuration, or pre-configuration, or according to the degree of channel congestion and/or the attribute of the service.

As a possible implementation manner, the probability is positively correlated with the degree of channel congestion.

As a possible implementation manner, the reserved resource is a first reserved resource for HARQ retransmission or a second reserved resource for blind transmission, and the blind transmission is transmission without HARQ feedback.

When the reserved resource corresponding to the indication information is the first reserved resource, determining that the reserved resource whose signal quality is less than a fourth threshold among the reserved resources corresponding to the indication information belongs to the candidate resource;

When the reserved resource corresponding to the indication information is the second reserved resource, it is determined that among the reserved resources corresponding to the indication information, the reserved resource whose signal quality is less than a fifth threshold belongs to the candidate resource.

As a possible implementation manner, in the case that the ratio of the current candidate resources to the total resources is less than the sixth threshold, the determining unit is specifically further configured to:

It is determined that the resources in the first resource set whose signal quality is less than the sum of the fourth threshold and the first step length belong to the candidate resources, and the first resource set is the reserved resources corresponding to the indication information except for the current The resources other than the candidate resources are the set of the first reserved resources;

It is determined that resources in the second resource set whose signal quality is less than the sum of the fifth threshold and the second step size belong to the candidate resources, and the second resource set is the reserved resources corresponding to the indication information except for the current The resources other than the candidate resources are the set of the second reserved resources.

Determining that the reserved resource that is the second reserved resource among the reserved resources corresponding to the indication information is the candidate resource; and/or

It is determined that among the reserved resources corresponding to the indication information, the reserved resources that are the first reserved resources and whose signal quality is less than the seventh threshold are the candidate resources, and the signal quality is the measured first control information and /Or the signal quality of the data packet scheduled by the first control information; and/or

It is determined that among the reserved resources corresponding to the indication information, the reserved resources whose signal quality is greater than or equal to the seventh threshold and whose distance is greater than the second distance threshold are the first reserved resources, are the candidate resources, and The distance is the distance between the first device and the sending device determined according to the location information.

As a possible implementation manner, the device further includes:

The update unit is used to update the value of the counter;

The selection unit is used to select or reselect resources when the updated value of the counter is equal to the set value;

The sending unit is further configured to use the candidate resource to send a fourth data packet when the updated value of the counter is not equal to the set value.

As a possible implementation manner, the device further includes:

The second receiving unit is configured to receive feedback information for the first data packet;

The update unit is specifically configured to update the value of the counter when the feedback information is information used to indicate that the transmission of the first data packet is successful;

The holding unit is configured to keep the value of the counter unchanged when the feedback information is information used to indicate that the transmission of the first data packet fails.

As a possible implementation manner, the selection unit is specifically configured to:

When the fourth data packet is a data packet retransmitted based on HARQ, perform resource selection or reselection according to the first probability value;

When the fourth data packet is a data packet based on blind transmission, the resource selection or reselection is performed according to the second probability value.

As a possible implementation manner, the counter includes a first counter and a second counter, and the update unit is specifically configured to:

When the first data packet is a data packet retransmitted based on HARQ, updating the value of the first counter;

When the first data packet is a blindly transmitted data packet, the value of the second counter is updated.

As a possible implementation manner, the counter includes a first counter, a second counter, and a third counter, and the update unit is specifically configured to:

When the first data packet is a unicast service data packet, updating the value of the first counter;

When the first data packet is a data packet of a multicast service, updating the value of the second counter;

When the first data packet is a data packet of a broadcast service, the value of the third counter is updated.

When the first data packet is a periodic service data packet, updating the value of the first counter;

When the first data packet is a data packet of an aperiodic service, the value of the second counter is updated.

In a third aspect, a communication device is disclosed. The communication device includes a processor, a memory, an input interface, and an output interface. The input interface is used to receive information from other communication devices other than the communication device, and the output interface is used to send information outside the communication device. Other communication devices output information. When the processor executes the computer program stored in the memory, the processor is caused to execute the communication method disclosed in the first aspect or any possible implementation manner of the first aspect.

A fourth aspect discloses a computer-readable storage medium with a computer program stored on the computer-readable storage medium, and when the computer program runs, the communication method as disclosed in the first aspect or any one of the first aspect is implemented .

Description of the drawings

Figure 1 is a schematic diagram of a network architecture disclosed in an embodiment of the present invention;

Figure 2 is a schematic diagram of a V2X disclosed in an embodiment of the present invention;

Fig. 3 is a schematic diagram of a car networking disclosed in an embodiment of the present invention;

FIG. 4 is a schematic diagram of perception of V2X disclosed in an embodiment of the present invention;

FIG. 5 is a schematic diagram of reserved resources of a TB disclosed in an embodiment of the present invention;

FIG. 6 is a schematic flowchart of a communication method disclosed in an embodiment of the present invention;

FIG. 7 is a schematic diagram of a UE acquiring resources according to an embodiment of the present invention;

8 is a schematic diagram of determining whether a reserved resource belongs to a candidate resource according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of reserved resource division disclosed in an embodiment of the present invention;

FIG. 10 is a schematic flowchart of another communication method disclosed in an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a communication device disclosed in an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of another communication device disclosed in an embodiment of the present invention;

Fig. 13 is a schematic structural diagram of another communication device disclosed in an embodiment of the present invention.

detailed description

The embodiment of the invention discloses a communication method, a device and a computer-readable storage medium, which are used to improve the reliability of data transmission. Detailed descriptions are given below.

In order to better understand the communication method, device, and computer-readable storage medium disclosed in the embodiments of the present invention, the following describes the network architecture used in the embodiments of the present invention. Please refer to FIG. 1. FIG. 1 is a schematic diagram of a network architecture disclosed in an embodiment of the present invention. As shown in Figure 1, the network architecture may include multiple devices (three are shown in Figure 1). One of the multiple devices may only communicate with another device, and one of the multiple devices may also communicate with multiple devices at the same time. For example, the device 1 may only communicate with the device 2, or it may communicate with the device 2 and the device 3 at the same time. Among them, these devices may all be terminal devices, or some of them may be terminal devices and some of them may be access network devices.

The terminal equipment can be a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user device . The access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, aircraft (for example, airplanes, drones, flying cars, hot air balloons, etc.), roadside units, wearable devices, and future 5G networks Terminal or terminal in the future evolved public land mobile network (PLMN).

The access network equipment can be a device used to communicate with terminal equipment, and can be a base transceiver in the global system for mobile communication (GSM) or code division multiple access (CDMA) station, BTS), it can also be a base station (nodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolved base station in a long term evolution (LTE) system (evolutional node B, eNB or eNodeB), it can also be a terminal that functions as an access network device in device-to-device (D2D) communication, and can also be a relay station, access point, vehicle-mounted device, roadside unit, Transmitting points, wearable devices, network-side devices in the future 5G network or access network devices in the future evolved PLMN, or any device that undertakes network functions, etc.

The embodiments of the present invention are suitable for communication between devices that can select resources on their own. In order to better understand the embodiments of the present invention, the following describes the application scenarios of the embodiments of the present invention. The following description takes V2X as an example. In addition to being applied to V2X, the embodiments of the present invention can also be applied to NR Uu systems, and can also be applied to communication between other devices for self-selected resources, which is not limited here. Please refer to FIG. 2. FIG. 2 is a schematic diagram of a V2X disclosed in an embodiment of the present invention. As shown in Figure 2, V2X includes vehicle-to-vehicle (V2V) communication, vehicle-to-pedestrian (V2P) communication, and vehicle-to-infrastructure (V2I) communication. Inter-communication, vehicle-to-network (V2N) communication. Please refer to FIG. 3, which is a schematic diagram of an Internet of Vehicles disclosed in an embodiment of the present invention. As shown in Figure 3, the Internet of Vehicles may include one or more global navigation satellite systems (GNSS), one or more next-generation base stations (generational node B, gNB), one or more eNBs, one or more Multiple road side units (RSU) and multiple vehicle-mounted devices (such as UE1, UE2, UE3, etc.). GNSS can provide positioning information and authorization information for other network elements. Vehicle-mounted devices can communicate with each other. The RSU can communicate with vehicle-mounted equipment and/or eNB. The eNB can communicate with the vehicle-mounted equipment and/or RSU. The gNB can communicate with on-board equipment and/or RSU. Among them, the function of the RSU can be either a function of a vehicle-mounted device, a function of an eNB or gNB device, or a function of a vehicle-mounted device + an eNB device. Wherein, eNB and/or gNB are optional. When there is an eNB and/or gNB, it is a scenario with network coverage, and when there is no eNB or gNB, it is a scenario without network coverage.

In NR V2X, two resource allocation modes are defined. Mode 1: The base station schedules the side link transmission resources to be used by the UE, that is, the UE obtains the resources configured by the base station or the network device for side link transmission, and the UE uses the configured resources to communicate on the side link. Mode 2: The UE determines the side link transmission resources in the side link resource pool or the pre-configured side link resource pool configured by the base station or the network device. For example, the implementation may be: the UE determines the sidelink transmission resources through the sensing or sensing process, that is, the UE detects the sidelink control information (SCI) of other UEs or the process side The sidelink (SL) measurement is used to obtain the information occupied by other UE resources, and the sidelink transmission resources are determined based on the resources in the resource pool and the resources occupied by other UEs.

Please refer to FIG. 4, which is a schematic diagram of V2X perception according to an embodiment of the present invention. As shown in Figure 4, the resource pool may be a collection of resources configured for communication in a specific carrier or bandwidth part. The corresponding carrier or bandwidth part can come from the intelligent transport system (ITS) spectrum, or it can come from the authorized spectrum used for cellular links. When the UE needs to use resources, the UE can decode the SCI in a sensing window (for example, within a predefined or configured period of time before the current data packet to be transmitted, such as 100ms, 500ms, 1s, etc.) According to the resource occupation and resource reservation information provided in the SCI of other UEs, the resource selection can be performed avoiding the resources occupied by other UEs as shown in the figure, avoiding resource conflicts between different UEs. Among them, the sensing window is used for a sense of sliding, that is, the UE needs to perform measurement and detection all the time before the data packet arrives. The measurement result when selecting the resource is based on the measurement result in the listening window before the data packet arrives. In Figure 4, n represents the arrival time of the data packet to be transmitted, and the area within the time range of [n+T1,n+T2] is the area where the UE selects transmission resources, which is called the resource selection window, and its size can be It is pre-defined, configured or pre-configured, or it can be determined by the UE itself according to the urgency and delay requirements of the data packet to be transmitted. In the resource selection window, the UE should select the transmission resource and send out the data packet to be sent. In Fig. 4, through listening, it can be detected that UE1, UE2, and UE3 reserve possible future resources in the listening window, that is, reserved resources. In the example in FIG. 4, in the resource selection window on the right side of the sensing window, the resources in the resource pool except those reserved by UE1, UE2, and UE3 are resources that are not selected or occupied by the UE.

In a wireless communication system, data packets are transmitted in transmit blocks (TB). Please refer to FIG. 5. FIG. 5 is a schematic diagram of a reserved resource of a TB disclosed in an embodiment of the present invention. As shown in Figure 5, in mode 2, the TB for the initial transmission of the data packet is TB1, and when TB1 is sent, resources can be reserved for the retransmission TB1' of the data packet. When TB1' is retransmitted, resources can be further reserved for its subsequent retransmission TB1". The retransmission of TB1' and TB1" may not necessarily occur, depending on the HARQ feedback sent by the terminal device. When the feedback of TB1 is ACK, the retransmission of TB1' and TB1" will not occur. When the feedback of TB1 is a negative acknowledgement (NACK), TB1' will occur. The feedback of TB1' is In the case of ACK, TB1" retransmission will not occur. When the feedback of TB1' is NACK, TB1' will occur. The HARQ response of the present invention can be a unicast-based response of a terminal device to the transmitting terminal device of another data source, or a group of terminal devices based on multicast or multicast to the transmitting terminal device of a data source. The response may also be the response of an unlimited number of terminal devices based on broadcast to the transmitter of the data source, which is not limited in the present invention.

For the sending device of the TB, when the feedback it receives is ACK, it indicates that the transmission of the TB is successful, and the sending device can release the reserved resources corresponding to the TB. When the feedback it receives is NACK, it means that the transmission of this TB has failed, and the transmitting device can use reserved resources to retransmit this TB. It can be seen that when a TB has a corresponding reserved resource, the sending device of this TB can determine whether to release or continue to use the reserved resource according to the received feedback. Therefore, when the reserved resource is released, other devices dare not use the reserved resource, which causes a waste of resources. When the reserved resource is not released, other devices use the reserved resource incorrectly, causing resource conflicts. The present invention needs to process based on the measurement result in the listening or sensing window, especially for the reserved measurement result, to determine the resource for transmission in the resource selection window.

Based on the network architecture shown in FIG. 1, please refer to FIG. 6. FIG. 6 is a schematic flowchart of a communication method disclosed in an embodiment of the present invention. The steps of the communication method are described in detail below. Among them, the method can be applied to terminal equipment, RSU or other equipment with the ability or function of self-selecting resources. It can be understood that the functions executed by the first device in this application may also be executed by the chip or corresponding functional unit in the first device.

601. The first device receives first control information.

When the first device needs to select a resource or reselect a resource, it may receive the first control information, that is, detect or listen to the first control information, and the first control information may include indication information for reserving resources. The first device may detect or listen to the first control information sent by one or more devices, that is, the number of the first control information may be one or more.

In one case, the indication information may be information of reserved resources based on HARQ feedback.

In another case, the indication information may be information about the resources reserved for the retransmission for the first transmission, or information about the resources reserved for the second retransmission for the first retransmission, or the second retransmission. The information about the reserved resources for the initial transmission or retransmission of the data packet for the initial transmission of the third data packet may also be the information about the reserved resources for the transmission based on HARQ feedback to the transmission of blind transmission, or it may be based on the blind transmission. The information of the reserved resources for transmission based on HARQ feedback is transmitted. Optionally, the indication information can be carried in the physical sidelink control channel (PSCCH) or in the physical sidelink shared channel (PSSCH), which is not done in the present invention. limited.

602. The first device determines, according to the first control information, whether the reserved resource corresponding to the indication information is a candidate resource.

After detecting or intercepting the first control information, the first device may determine whether the reserved resource corresponding to the indication information belongs to the candidate resource according to the first control information. Among them, the candidate resource is a collection of resources that can be selected and used.

After detecting or intercepting the first control information, the first device can determine all reserved resources in the resource pool. At the same time, the first device can also detect or listen to the resources being used by the device, and can detect or listen to the resources occupied in the resource pool. The first device may determine that resources in the resource pool except all reserved resources and occupied resources are resources that are not used by the device and are not reserved, that is, idle resources. The first device may directly determine the idle resource as a candidate resource, and then or at the same time may determine whether the reserved resource belongs to the candidate resource. The first device may first classify all reserved resources into candidate resources, and then exclude reserved resources that do not meet the requirements from the candidate resources. It may also be that reserved resources that meet the requirements are continuously classified as candidate resources, and reserved resources that do not meet the requirements are not classified as candidate resources.

Please refer to FIG. 7. FIG. 7 is a schematic diagram of a UE acquiring resources according to an embodiment of the present invention. As shown in Figure 7, suppose that UE1 is the sending UE of TB1, UE2 is the receiving UE of TB1, and also the UE that feeds back TB1, and UE3 and UE4 are UEs adjacent to UE1 and UE2 in the same area or location. Assuming that the arrival time of the data packet to be transmitted in the UE buffer is time slot n, the UE can always blindly check the SCI and its associated data packets on all time-frequency resources used for transmission before time slot n. The information in the SCI is detected to determine which resources are unused idle resources, which resources are reserved resources, and which resources are occupied resources. The operation of the UE before n+T1 is to determine the candidate resource for transmitting the data packet. Between n+T1 and n+T2, the UE determines the transmission resource for transmitting the data packet from the candidate resources, and makes the corresponding data transmission.

In an embodiment, the first control information may also include information about the time slot where the reserved resource is located. The first device may detect the second control information and/or the data packet scheduled by the second control information on the time slot where the reserved resource is located, that is, detect the second control information and/or the second control information scheduling on the time slot corresponding to the information When the first device does not detect the second control information and/or the data packet scheduled by the second control information in the time slot where the reserved resource is located, it indicates that there is no information transmission on the reserved resource, that is, the reserved resource If the reserved resource is not used, it can be considered that the reserved resource is released, and the first device can determine that the reserved resource corresponding to the indication information is a candidate resource. As shown in Figure 7, the first device detects SCI2 corresponding to TB2 in the listening window. SCI2 can indicate the reserved resources for the first retransmission and the second retransmission of TB2 at the same time, or SCI2 only indicates the first time. Retransmit the reserved resources of TB2', but TB2' can also instruct it to retransmit the reserved resources of TB2" next time. Among them, the reserved resources of the first retransmission are still in the listening window, and the second time The reserved resources for retransmission are in the selection window. In the method of this embodiment, the first device determines whether there is data being transmitted on the reserved resources for the first retransmission TB2' to determine the second retransmission TB2" Whether the reserved resources can be used. The detection method may include: not detecting the corresponding second control information and/or the data packet scheduled by the second control information on the reserved resource corresponding to the first retransmission TB', or although the second control information and the second control information are detected / Or a data packet scheduled by the second control information but the second control information does not indicate the reservation for the second retransmission. Optionally, TB2 or TB2' may also indicate the reserved resources for the initial transmission of another new packet TB5 (not shown in Fig. 7). That is, the second data packet indicated by the second control information may be a retransmission of the data packet indicated by the first control information, or a new transmission of another data packet, which is not limited in the present invention.

When the first device detects the second control information and/or the data packet scheduled by the second control information on the time slot where the reserved resource is located, it indicates that there is information transmission on the reserved resource, that is, the reserved resource is used. It is considered that the reserved resource has not been released. Optionally, when the first device does not detect the second control information and/or the data packet scheduled by the second control information in the time slot where the reserved resources are located, it may also be that the first device detects the second control information and/or The data packet scheduled by the second control information, but the detected signal quality of the first control information and/or the data packet scheduled by the first control information is lower than the preset threshold. That is, the first device may determine the reserved resources corresponding to the indication information and/or the indication information included in the second control information according to the detected signal quality of the first control information and/or the data packets scheduled by the first control information. Whether the reserved resource is a candidate resource. In one case, when the detected signal quality of the first control information and/or the data packet scheduled by the first control information is less than the first threshold, it indicates that the information sent by the device corresponding to the reserved resource has a greater impact on the first device. The first device may determine that the reserved resource corresponding to the indication information and/or the reserved resource corresponding to the indication information included in the second control information belongs to the candidate resource. In another case, the first device may determine that the first control information corresponding to the reserved resources corresponding to the indication information and/or the one or more reserved resources with the smallest signal quality of the data packets scheduled by the first control information belong to Candidate resources, that is, determine that the N reserved resources of the reserved resources corresponding to the indication information are candidate resources, that is, the one or the smaller ones with the least impact on the first device from the information sent by the corresponding device in the reserved resources are determined to be candidates Resources. Only the reserved resource with the smallest signal quality of the corresponding first control information and/or the data packet scheduled by the first control information may be determined as belonging to the candidate resource. All signal qualities can be sorted in descending order, and then the last N reserved resources are classified into candidate resources. It is also possible to sort the signal quality of all the first control information and/or the data packets scheduled by the first control information in ascending order, and then classify the top N reserved resources into candidate resources. Wherein, the resource occupied by the second control information and/or the data packet scheduled by the second control information is the reserved resource corresponding to the indication information. Wherein, N is an integer greater than or equal to 1.

Optionally, the value of N may be determined according to the data volume of the first data packet to be sent. For example, the sorted first control information and/or the reserved resources with the smallest signal quality of the data packets scheduled by the first control information can be classified as candidate resources, and then it can be judged whether the current candidate resources are enough to send the first data packet. In the case of judging that the current candidate resource is sufficient to send the first data packet, it is not necessary to continue to select from the sorted reserved resources. In the case of judging that the current candidate resource is not enough to send the first data packet, you can continue to select Select from the reserved resources until the current candidate resource is enough to send the first data packet. For another example, you can first calculate the resources required to send the first data packet. In the case that the required resources are less than the current candidate resources, determine the required remaining resources according to the required resources and the current candidate resources, from the reserved resources sorted in descending order From the back-to-front or in the ascending order of the reserved resources, the signal quality of the data packets scheduled according to the first control information and/or the first control information is selected from low to high, until all the selected candidate resources are greater than Or equal to the remaining resources required.

Optionally, the value of N can also be determined according to the ratio of the current candidate resources to the total resources in the resource pool. For example, the reserved resources with the smallest signal quality of the first control information and/or the data packets scheduled by the first control information among the ordered reserved resources can be classified as candidate resources, and then it can be determined that the current candidate resources account for the total resources. Whether the ratio is greater than the resource threshold, such as 20%, 30%, 40%, etc., in the case of judging that the ratio is greater than the resource threshold, you may not continue to select from the sorted reserved resources, and if it is judged that the ratio is not greater than the resource threshold In this case, you can continue to select from the sorted reserved resources until the ratio is greater than the resource threshold. It is also possible to first determine whether the proportion of the current candidate resources to the total resources is greater than the resource threshold. In the case of determining that the proportion is greater than the resource threshold, it may not be selected from the sorted reserved resources. When it is determined that the proportion is not greater than the resource threshold Next, you can select from the sorted reserved resources until the ratio is greater than the resource threshold. The selection can be selected one by one according to the first control information and/or the signal quality of the data packets scheduled by the first control information from low to high, or the required resources can be calculated first, and then a one-time selection can be made according to the required resources.

Optionally, the value of N can also be determined according to the size of the data volume of the first data packet to be sent and the ratio of the current candidate resources to the total resources, and the above two methods can be combined, which will not be repeated here.

Optionally, the first device may also determine whether the reserved resource is valid according to the feedback result of the corresponding data packet. Assuming that UE1 in Figure 7 sends SCI1 and TB1 to UE2, the resource occupied by TB1 is S1, and the reserved resource S2 for TB1 to retransmit TB1' is reserved in SCI1. UE1 can detect the HARQ feedback of UE2, and when the feedback is ACK, UE1 releases the reserved resource S2. When the feedback is NACK, UE1 sends TB1' on the reserved resource S2, indicating in the corresponding SCI1' the next retransmission of the reserved resource S3 of TB1". At this time, the reserved resource S2 of TB1' continues to be valid. Is S3 Effective, depends on the feedback result for TB1'. S1, S2, S3 may be the same or different.

In an embodiment, the first device may first detect the SCI1 sent by the UE1, and the SCI1 may indicate the time-frequency resource S1 for the initial transmission of TB1 and the reserved resource S2 for the retransmission of TB1. When the first device detects SCI1 and/or TB1, it determines that the first transmission TB1 is detected. When the first device does not detect the retransmission of TB1' on S2, it determines that the reserved resource S2 made by UE1 for TB1 is invalid, and the first device can classify the reserved resource S2 as a candidate resource. When the first device detects the retransmission of TB1' on S2, it determines that the reserved resources S2 and/or S3 made by UE1 for TB1 are valid, and can directly determine the reserved resources S2 as not being candidate resources, or according to The detected signal quality continues to determine whether the reserved resource S2 is a candidate resource. Optionally, the first device may be a device that performs unicast or multicast communication with UE1, or may be another device, which is not limited in the present invention.

In one embodiment, after UE2 receives TB1 from UE1, when the feedback sent to UE is NACK, UE2 does not receive TB1' within a certain period of time after sending the feedback information, indicating that the transmission of TB1' exceeds the corresponding According to the time delay requirement of data packet transmission, UE2 can use reserved resource S2 as a release resource. Then UE2 can use this reserved resource S2 when transmitting its own data. Correspondingly, after UE3 detects the first control information and the feedback information for the first control information on the feedback channel, it does not detect the second control on the reserved resources corresponding to the first control information within a period of time. Information or a data packet scheduled by the second control information, it is determined that the reserved resource corresponding to the first control information is a candidate resource. It can be seen that whether the reserved resources are valid can be determined according to the data transmission time.

In an embodiment, the first control information may further include location information of the first control information sending device. The first device may determine the distance between the first device and the sending device according to the location information. In one case, when the distance is greater than the first distance threshold, it indicates that the distance between the device sending the information and the first device is far, and the information sent by the device corresponding to the reserved resource will have less impact on the first device. The device may determine that the reserved resource corresponding to the indication information is a candidate resource. The first distance threshold may be a preset threshold, and the preset threshold may be configured by the access network device, or may be preconfigured through predefined information. The first distance threshold may also be M times the minimum communication distance required by the first data packet, or M times the minimum communication distance required by the device corresponding to the reserved resources to send the data packet, and M is an integer greater than or equal to 1, For example, equal to 2. The first distance threshold may also be the sum of the minimum communication distance required by the first data packet and a threshold. Different data packets can correspond to different minimum communication distances, and different data packets can also correspond to the same minimum communication distance.

For example, suppose the distance threshold is the minimum communication distance required by the data packet. UE3 detects SCI1 sent by UE1a, reserved resources S2a in SCI1, SCI2 sent by UE1b, reserved resources S2b in SCI2, SCI3 sent by UE1c, and reserved resources S2c in SCI3. The distances from UE1a, UE1b, and UE1c to UE3 are 1km, 500m, and 300m in sequence. When the distance threshold is 600m, since the distance between UE1a and UE3 is greater than the distance threshold, and the distance between UE1b and UE1c to UE3 is less than the distance threshold, it can be determined that the reserved resource S2a corresponding to UE1a is a candidate resource, and that UE1b corresponds to The reserved resources S2b and the reserved resources S2c corresponding to UE1c are not candidate resources. When the minimum distance required for the data packets sent by UE1a, UE1b, and UE1c are 800m, 600m, and 200m in sequence, it can be determined that the reserved resource S2a corresponding to UE1a and the reserved resource S2c corresponding to UE1c are candidate resources, and the pre-determined distance corresponding to UE1b can be determined. The reserved resource S2b is not a candidate resource.

Optionally, the first device may determine that one or more reserved resources with the largest corresponding distance among the reserved resources corresponding to the indication information belong to candidate resources. Among them, it is determined that one or more reserved resources corresponding to the largest distance among the reserved resources corresponding to the indication information are candidate resources, and one or more reserved resources corresponding to the reserved resources corresponding to the indication information have the smallest signal quality. It is similar to candidate resources. For detailed description, please refer to the corresponding description, which will not be repeated here.

For example, UE3 detects data packets sent by K UEs, and UE3 can sort the distances from these K UEs to UE3 from far to nearest. When UE3 determines the candidate resources of its own data packet, it may preferentially use the reserved resources made by UEs that are far away as candidate resources.

In an embodiment, the first device may measure the signal quality of the first control information and/or the data packets scheduled by the first control information. In one case, when the signal quality is less than the second threshold, it indicates that the information sent by the device corresponding to the reserved resource has little impact on the first device, and the first device may determine that the reserved resource corresponding to the indication information is a candidate resource . In another implementation manner, the first device may determine that one or more reserved resources with the smallest signal quality corresponding to the reserved resources corresponding to the indication information are candidate resources. The determination method is the same as that described above, and details are not described herein. Among them, the signal quality can be reference signal received power (RSRP), signal to noise ratio (SNR), received signal strength indication (RSSI), reference signal received quality (reference signal to noise ratio, SNR) One or more of signal receiving quality (RSRQ), channel quality indication (CQI), and signal to interference plus noise ratio (SINR).

In an embodiment, the first control information may further include location information of the first control information sending device, and the first device may determine the distance between the first device and the sending device according to the location information, and measure the first control information and/ Or the signal quality of the data packet scheduled by the first control information. When the distance is greater than the second distance threshold and/or the signal quality is less than the third threshold, the first device may determine that the reserved resource corresponding to the indication information is a candidate resource, and the second distance threshold and the first distance threshold may be determined in the same manner , Can also be different. The first distance threshold and the second distance threshold may be the same or different. The first threshold, the second threshold, and the third threshold may be the same or different, and may be configured through a network device, or may be predefined or pre-configured. For example, a UE that exceeds a certain distance may be determined first, and then the UE with the smallest signal quality among the determined UEs that exceed the certain distance is prioritized as the candidate resource. It is also possible to first determine the UE whose signal quality is lower than a specific value, and then prioritize the UE with the farthest distance from UE3 or the UE exceeding the corresponding distance threshold among the determined UEs as candidate resources.

In an embodiment, the first device may measure the signal quality corresponding to the indication information on the physical layer feedback channel. In one case, when the signal quality is less than the fourth threshold or within the threshold range, the feedback can be considered as an ACK, and the first device can determine that the reserved resource corresponding to the indication information is a candidate resource. In another case, the first device may determine that one or more reserved resources with the smallest signal quality among the reserved resources corresponding to the indication information are candidate resources. The determination method is the same as that described above, and details are not described herein.

For example, please refer to FIG. 8. FIG. 8 is a schematic diagram of determining whether a reserved resource belongs to a candidate resource according to an embodiment of the present invention. As shown in Fig. 8, sidelink feedback control information (SFCI) is associated with corresponding data packets. UE3 can measure and detect the physical layer sidelink feedback channel (PSFCH) fed back by the receiver UE2 of the corresponding TB1 after UE1 sends TB1. When it is detected that the signal quality is less than a certain value or within a threshold range, it can be considered that the PSFCH feedback is an ACK, and it can be determined that the corresponding reserved resource is a candidate resource. The UE3 may also sort the signal quality detected on all PSFCHs in descending order, and the UE3 may preferentially determine the reserved resources corresponding to the PSFCH resources with the lowest signal quality as candidate resources.

In an embodiment, the first device may obtain the probability, and then may determine according to the probability that the reserved resource corresponding to the indication information belongs to the candidate resource. The probability may be configured by signaling, and the signaling may be sent by an access network device or pre-configured. The probability can also be determined according to the degree of channel congestion and/or the attributes of the service. Optionally, the attributes of the service may include the priority of the service, the period of the service, the size of the data packet of the service, the delay requirement of the service, the type of the service corresponding message, etc. The probability can be positively correlated with the degree of channel congestion, that is, the more serious the channel congestion, the greater the probability that the reserved resource belongs to the candidate resource, and the more idle the channel congestion, the smaller the probability that the reserved resource belongs to the candidate resource. The probability can be related to the priority of the service, that is, the higher the priority of the service, the greater the probability that the reserved resource belongs to the candidate resource, and the lower the priority of the service, the smaller the probability that the reserved resource belongs to the candidate resource. For example, the probability can be negatively related to the delay of the service, that is, the smaller the delay of the service, the greater the probability of selecting reserved resources. For example, the probability can be positively correlated with the period of the service, that is, the greater the period of the service, the greater the probability of selecting reserved resources. It is determined by probability that the reserved resources belong to the candidate resource set, and the statistically optimal resource utilization efficiency can be obtained from the system perspective and the possibility of conflicts can be reduced. For example, the probability is 0.3. For a certain reserved resource, a 30% probability can be used to determine whether the reserved resource is a candidate resource.

In an embodiment, the reserved resource may be the first reserved resource for HARQ retransmission, or the second reserved resource for blind transmission, and blind transmission is transmission without HARQ feedback. In one case, the first device may measure the signal quality of the first control information and/or the data packet scheduled by the first control information, and when the reserved resource corresponding to the indication information is the first reserved resource, the first device may It is determined that the reserved resources whose signal quality is less than the fifth threshold among the reserved resources corresponding to the indication information are candidate resources. When the reserved resources corresponding to the indication information are the second reserved resources, the first device can determine the reservation corresponding to the indication information Among the resources, reserved resources whose signal quality is less than the sixth threshold are candidate resources. That is, different types of reserved resources have different corresponding quality thresholds. The fifth threshold and the sixth threshold may be configured separately, and may be configured according to the priority of the detected signal and the priority of the signal to be transmitted. The fifth threshold and the sixth threshold may be the same during initial transmission, and configured separately during retransmission. The fifth threshold can be set larger than the sixth threshold. A fixed offset can be set between the fifth threshold and the sixth threshold. After one threshold is set, the other will also be determined, for example, the fifth threshold=sixth threshold+offset. In this embodiment, by setting different signal quality thresholds for reserved resources with HARQ and reserved resources for blind transmission, targeted exclusion, selection, and confirmation of resources are achieved, thereby improving the effectiveness of resource selection. Sex.

Further, after determining that part of the reserved resources belong to the candidate resources according to the fifth threshold and/or the sixth threshold, in the case where the ratio of the current candidate resources to the total resources is less than the seventh threshold, the first device may determine that the first resource concentration Resources whose signal quality is less than the sum of the fifth threshold and the first step length are candidate resources, and it can be determined that the resources in the second resource set whose signal quality is less than the sum of the sixth threshold and the second step length are candidate resources. The first resource set is a set of the first reserved resources among the reserved resources corresponding to the indication information except for the current candidate resources, and the second resource set is the set of reserved resources corresponding to the indication information except for the current candidate resources The other resources are the set of second reserved resources. When the proportion of candidate resources is less than a certain proportion, such as 20%, it indicates that the candidate resources are not enough and the resources in the candidate resources need to be increased. The threshold can be increased by a fixed step length, that is, the selection conditions are relaxed. Further, different step sizes may be set for the reserved resources for HARQ retransmission and the reserved resources for blind transmission respectively, or the same step size may be set. For example, the step size for reserved resources with HARQ retransmission is 1 dB, and the step size for reserved resources configuration for blind transmission is 3 dB. For another example, the step size of reserved resources for HARQ retransmission is 3dB, and the step size of reserved resource configuration for blind transmission is 2dB. Different resource-increasing thresholds are set for the reserved resources for HARQ retransmission and the reserved resources for blind transmission, respectively, and resources can be specifically increased for these two types of transmissions, and the effectiveness of resource selection is improved.

In another implementation manner, the first control information may further include location information of the first control information sending device. The first device may only determine that the reserved resource that is the second reserved resource among the reserved resources corresponding to the indication information is a candidate resource. It may also be determined that only the reserved resources whose signal quality is less than the eighth threshold among the reserved resources corresponding to the indication information are the first reserved resources and are candidate resources. It may also be determined that only the reserved resources that are the first reserved resource, the signal quality is greater than or equal to the eighth threshold, and the distance is greater than the third distance threshold among the reserved resources corresponding to the indication information are candidate resources. It may also be determined that the reserved resources corresponding to the indication information are the second reserved resources and the reserved resources corresponding to the indication information are the first reserved resources and whose signal quality is less than the eighth threshold are candidate resources. It may also be determined that the reserved resources corresponding to the indication information are the second reserved resources and the reserved resources corresponding to the indication information are the first reserved resources, the signal quality is greater than or equal to the eighth threshold and the distance is greater than the third distance threshold. The reserved resources are candidate resources. It may also be determined that the reserved resources corresponding to the indication information are the first reserved resources and the signal quality is less than the eighth threshold, and the reserved resources corresponding to the indication information are the first reserved resources and the signal quality is greater than or equal to the eighth threshold and The reserved resources whose distance is greater than the third distance threshold are candidate resources. It can also be determined that the reserved resources corresponding to the indication information are the second reserved resources, the reserved resources corresponding to the indication information are the first reserved resources and the signal quality is less than the eighth threshold, and the reserved resources corresponding to the indication information are The first reserved resource, the reserved resources whose signal quality is greater than or equal to the eighth threshold and the distance greater than the third distance threshold are candidate resources, that is, all the reserved resources for blind transmission in the reserved resources are determined as candidate resources, and the reserved resources Among the reserved resources for all HARQ retransmissions, reserved resources with signal quality less than the eighth threshold, signal quality greater than or equal to the eighth threshold and distance greater than the third distance threshold are determined as candidate resources. The signal quality is the measured signal quality of the first control information and/or the data packet scheduled by the first control information, and the distance is the distance between the first device and the sending device determined according to the location information. For example, please refer to FIG. 9, which is a schematic diagram of a reserved resource division disclosed in an embodiment of the present invention. As shown in Figure 9, all reserved resources in the resource pool are Sa, and Sa includes all reserved resources Sb used for HARQ retransmission and a set Sc of all reserved resources used for blind transmission. All reserved resources Sd whose measured signal quality is less than the eighth threshold in Sb and Sc are classified as candidate resources. Further, the reserved resources Se whose signal quality is greater than the eighth threshold and the distance is greater than the third distance threshold among Sb and Sc can be classified as candidate resources. It can be seen that the candidate resource is equal to Sd+Se.

603. The first device sends the first data packet to the second device according to the candidate resource.

The first device determines whether the reserved resource corresponding to the indication information is a candidate resource according to the first control information, that is, after determining the final candidate resource, the first device can determine the transmission resource from the candidate resources, and then use the transmission resource to send the first data packet . The transmission resource can be all or part of the candidate resources. Whether the transmission resource is all or part of the candidate resources depends on the size of the first data packet. In the case where the first data packet is relatively large and all resources in the candidate resources are required to be able to transmit the first data packet, the transmission resources are all resources in the candidate resources. In the case where the first data packet is relatively small and can be transmitted using part of the candidate resources, the transmission resource may be part of the candidate resources. It can be seen that the transmission resource can be determined from the candidate resources according to the size of the first data packet, so that a suitable transmission resource can be determined, and it can be ensured that no resources will be wasted or insufficient resources will be caused. Among them, the candidate resource is greater than or equal to the transmission resource.

Based on the network architecture shown in FIG. 1, please refer to FIG. 10. FIG. 10 is a schematic flowchart of another communication method disclosed in an embodiment of the present invention. The steps of the communication method are described in detail below. Among them, the method can be applied to terminal equipment, RSU or other equipment with the ability or function of self-selecting resources. It can be understood that the functions executed by the first device in this application may also be executed by the chip or corresponding functional unit in the first device.

1001. The first device receives first control information.

Among them, step 1001 is the same as step 601. For detailed description, please refer to step 601, which is not repeated here.

1002. The first device determines, according to the first control information, whether the reserved resource corresponding to the indication information belongs to the candidate resource.

Wherein, step 1002 is the same as step 602. For detailed description, please refer to step 602, which will not be repeated here.

1003. The first device sends the first data packet to the second device according to the candidate resource.

Wherein, step 1003 is the same as step 603. For detailed description, please refer to step 603, which will not be repeated here.

1004. The first device updates the value of the counter.

After the first device sends the first data packet to the second device according to the candidate resource, the value of the counter may be updated. It can be updated after the first data packet is sent out for the first time. It can also be updated after the first data packet is successfully sent. At this time, the first device may also receive feedback information for the first data packet. When the feedback information is information indicating that the first data packet is successfully transmitted, the first device updates the value of the counter; when the feedback information is for When the information indicating that the transmission of the first data packet fails, the first device keeps the value of the counter unchanged, and does not update until the first data packet is successfully retransmitted or until the multiple retransmissions of the first data packet are all sent. Update the value of the counter. Among them, the initial value of the counter can be randomly selected within a fixed value range.

In an embodiment, the counter may include a first counter and a second counter. When the first data packet is a data packet retransmitted based on HARQ, the first device updates the value of the first counter. When the first data packet is a blind transmission When the first device updates the value of the second counter. For example, the value range of the first counter may be [5, 15], and the value range of the second counter may be [1, 50]. A value can be randomly selected within the range of values. That is, the first counter and the second counter can have different value ranges. The HARQ-based retransmission data packet and the blind transmission data packet may correspond to the same counter, or may correspond to different counters respectively. When the HARQ-based retransmitted data packet and the blindly transmitted data packet respectively correspond to different counters, the values of the corresponding counters may be different or the same.

For example, for retransmission with HARQ feedback, within the delay budget of the data packet or within the maximum number of retransmissions, when the feedback is always NACK, the value of the counter may not change. Within the time delay budget of the data packet or the maximum number of retransmissions, when the feedback is ACK, the value of the counter can be reduced by 1. For blind transmission, after the last retransmission of each TB, the value of the counter can be reduced by 1.

In an embodiment, the counter may include a first counter, a second counter, and a third counter. When the first data packet is a unicast service data packet, the first device updates the value of the first counter. When it is a data packet of a multicast service, the first device updates the value of the second counter. When the first data packet is a data packet of a broadcast service, the first device updates the value of the third counter. For transmission on side links, unicast services, multicast services, or broadcast services can correspond to the same counter, or they can correspond to different counters. When the unicast service, the multicast service, or the broadcast service respectively correspond to different counters, the values of the corresponding counters may be different or the same.

In an embodiment, the counter may include a first counter and a second counter. When the first data packet is a periodic service data packet, the first device updates the value of the first counter. When the first data packet is a non-periodic When the data packet of the business, the first device updates the value of the second counter. The periodic service and the aperiodic service can correspond to the same counter or correspond to different counters respectively. When periodic services and aperiodic services correspond to different counters, the values of the corresponding counters may be different or the same.

For example, NR V2X supports both aperiodic services and periodic services, and different services can maintain different counters. Different services can also maintain the same counter. Assuming the preset value is T, such as 20ms, 50ms, 100ms, etc., when the transmission interval between two adjacent data packets is T, the value of the decrement counter is 1. When the transmission interval between two aperiodic services is Tx, the value of the decrement counter is Tx. Similarly, when the interval of a certain periodic service data packet is Ty, the value of the decrement counter is Ty. It can be seen that in the case of maintaining the same counter, the value of the counter may be different or the same each time for periodic business and aperiodic business.

1005. When the updated value of the counter is equal to the set value, the first device selects or reselects the resource.

After the first device updates the value of the counter, it can determine whether the value of the counter is equal to the set value. After determining that the updated value of the counter is equal to the set value, the first device can select or reselect resources. Step 1001 to step 1002 may be executed again, or step 1002 may be executed according to the first control information detected before. Wherein, the set value can be 0 or other values, which is not limited here. When the fourth data packet is a data packet based on HARQ retransmission, the first device can select or reselect resources according to the first probability value. When the fourth data packet is a data packet based on blind transmission, the first device can The resource selection or reselection is performed according to the second probability value.

1006. When the updated value of the counter is not equal to the set value, the first device uses the candidate resource to send the fourth data packet.

After judging that the updated value of the counter is not equal to the set value, the resource selection or reselection is not performed, and the resources in the current candidate resource set can continue to be used. When there is a fourth data packet to be sent, the first device can use The candidate resource sends the fourth data packet.

Based on the network architecture shown in FIG. 1, please refer to FIG. 11. FIG. 11 is a schematic structural diagram of a communication device disclosed in an embodiment of the present invention. As shown in FIG. 11, the communication device may include:

The first receiving unit 1101 is configured to receive first control information, where the first control information includes indication information for reserving resources;

The determining unit 1102 is configured to determine, according to the first control information, whether the reserved resource corresponding to the indication information is a candidate resource;

The sending unit 1103 is configured to send the first data packet according to the candidate resource.

In an embodiment, the sending unit 1103 is specifically configured to:

Determine the transmission resource from the candidate resources;

Use the transmission resource to send the first data packet.

In an embodiment, the indication information is information about reserved resources based on HARQ feedback.

In one embodiment, the indication information is the information of the reserved resources for the retransmission of the initial transmission, or the information of the reserved resources for the second retransmission of the first retransmission, or the initial transmission or retransmission of the second data packet. Transmit the information of the reserved resources for the initial transmission of the third data packet, or the information of the reserved resources for the transmission based on HARQ feedback for the transmission of blind transmission, or the information of the reserved resources for transmission based on the blind transmission for the transmission based on HARQ feedback Information.

In an embodiment, the first control information may also include information about the time slot where the reserved resource is located, and the determining unit 1102 is specifically configured to:

When the second control information and/or the data packet scheduled by the second control information is not detected in the time slot where the reserved resource is located, it is determined that the reserved resource corresponding to the indication information is a candidate resource, and the second control information and/or second control information The resource occupied by the data packet of the information scheduling is the reserved resource corresponding to the indication information; or,

When the second control information and/or the data packet scheduled by the second control information is detected on the time slot where the reserved resource is located, it is determined according to the detected first control information and/or the signal quality of the data packet scheduled by the first control information Whether the reserved resource corresponding to the indication information and/or the reserved resource corresponding to the indication information included in the second control information is a candidate resource.

In an embodiment, the determining unit 1102 determines the reserved resource corresponding to the indication information and/or the indication information included in the second control information according to the detected first control information and/or the signal quality of the data packet scheduled by the first control information Whether the corresponding reserved resource is a candidate resource includes:

When the detected signal quality of the first control information and/or the data packet scheduled by the first control information is less than the first threshold, the reserved resource corresponding to the indication information and/or the reserved resource corresponding to the indication information included in the second control information are determined The reserved resources are candidate resources.

It is determined that one or more reserved resources with the smallest signal quality of the corresponding first control information and/or the data packet scheduled by the first control information in the reserved resources corresponding to the indication information are candidate resources.

In an embodiment, the first control information may further include location information of the first control information sending device, and the determining unit 1102 is specifically configured to:

It is determined that one or more reserved resources with the largest corresponding distance among the reserved resources corresponding to the indication information belong to candidate resources.

In an embodiment, the determining unit 1102 is specifically configured to:

It is determined that one or more reserved resources with the smallest signal quality corresponding to the reserved resources corresponding to the indication information belong to candidate resources.

When the distance is greater than the first distance threshold and/or the signal quality is less than the second threshold, it is determined that the reserved resource corresponding to the indication information is a candidate resource, and the first distance threshold is the preset threshold or the minimum required by the first data packet M times the communication distance, where M is an integer greater than or equal to 1.

In an embodiment, the determining unit 1102 is specifically configured to:

Measure the signal quality corresponding to the indication information on the physical layer feedback channel;

When the signal quality is less than the third threshold or within the threshold range, it is determined that the reserved resource corresponding to the indication information is a candidate resource; or,

It is determined that one or more reserved resources with the smallest signal quality among the reserved resources corresponding to the indication information are candidate resources.

In an embodiment, the determining unit 1102 is specifically configured to:

Probability of acquisition

It is determined according to the probability that the reserved resource corresponding to the indication information belongs to the candidate resource, and the probability is determined by the signaling configuration, or pre-configuration, or according to the channel congestion degree and/or the attribute of the service.

In one embodiment, the probability is positively related to the degree of channel congestion.

In one embodiment, the reserved resource is the first reserved resource for HARQ retransmission or the second reserved resource for blind transmission, and blind transmission is transmission without HARQ feedback.

In an embodiment, the determining unit 1102 is specifically configured to:

When the reserved resource corresponding to the indication information is the first reserved resource, determining that the reserved resource whose signal quality is less than the fourth threshold among the reserved resources corresponding to the indication information is a candidate resource;

When the reserved resource corresponding to the indication information is the second reserved resource, it is determined that the reserved resource whose signal quality is less than the fifth threshold among the reserved resources corresponding to the indication information is a candidate resource.

In an embodiment, when the ratio of the current candidate resources to the total resources is less than the sixth threshold, the determining unit 1102 is specifically further configured to:

It is determined that the resources in the first resource set whose signal quality is less than the sum of the fourth threshold and the first step length are candidate resources, and the first resource set is the first resource among the reserved resources corresponding to the indication information except for the current candidate resources. Collection of reserved resources;

It is determined that the resources in the second resource set whose signal quality is less than the sum of the fifth threshold and the second step size are candidate resources, and the second resource set is the second resource among the reserved resources corresponding to the indication information except for the current candidate resources. A collection of reserved resources.

Determine that the reserved resource that is the second reserved resource among the reserved resources corresponding to the indication information is a candidate resource; and/or

Determine that the reserved resources corresponding to the indication information are the first reserved resources and the reserved resources whose signal quality is less than the seventh threshold are candidate resources, and the signal quality is the measured first control information and/or the data packet scheduled by the first control information Signal quality; and/or

Determine that the reserved resources corresponding to the indication information are the first reserved resources, the signal quality is greater than or equal to the seventh threshold, and the reserved resources whose distance is greater than the second distance threshold are candidate resources, and the distance is the first reserved resource determined according to the location information. The distance between the device and the sending device.

In an embodiment, the communication device may further include:

The update unit 1104 is used to update the value of the counter;

The selecting unit 1105 is configured to select or reselect resources when the updated value of the counter is equal to the set value;

The sending unit 1103 is further configured to use the candidate resource to send the fourth data packet when the updated value of the counter is not equal to the set value.

In an embodiment, the communication device may further include:

The second receiving unit 1106 is configured to receive feedback information for the first data packet;

The update unit 1104 is specifically configured to update the value of the counter when the feedback information is information used to indicate that the first data packet is successfully transmitted;

The holding unit 1107 is configured to keep the value of the counter unchanged when the feedback information is information used to indicate that the transmission of the first data packet fails.

In an embodiment, the selecting unit 1105 is specifically configured to:

When the fourth data packet is a data packet retransmitted based on HARQ, the resource selection or reselection is performed according to the first probability value;

In an embodiment, the counter may include a first counter and a second counter, and the updating unit 1104 is specifically used for:

When the first data packet is a data packet retransmitted based on HARQ, update the value of the first counter;

In an embodiment, the counter may include a first counter, a second counter, and a third counter, and the updating unit 1104 is specifically configured to:

When the first data packet is a unicast service data packet, update the value of the first counter;

When the first data packet is a data packet of a multicast service, update the value of the second counter;

When the first data packet is a broadcast service data packet, the value of the third counter is updated.

In an embodiment, the counter may include a first counter and a second counter, and the updating unit 1104 is specifically configured to:

When the first data packet is a periodic service data packet, update the value of the first counter;

When the first data packet is a non-periodic service data packet, the value of the second counter is updated.

For a more detailed description of the above-mentioned first receiving unit 1101, determining unit 1102, sending unit 1103, updating unit 1104, selecting unit 1105, second receiving unit 1106, and holding unit 1107, you can directly refer to the relevant first device in the above method embodiment. The description is directly obtained, so I won’t repeat it here.

Based on the network architecture shown in FIG. 1, please refer to FIG. 12. FIG. 12 is a schematic structural diagram of another communication device disclosed in an embodiment of the present invention. Wherein, the communication device may be a device or a chip in the device. As shown in FIG. 12, the communication device may include a processor 1201, a memory 1202, an input interface 1203, an output interface 1204, and a bus 1205. The memory 1202 may exist independently, and may be connected to the processor 1201 through the bus 1205. The memory 1202 may also be integrated with the processor 1201. Among them, the bus 1205 is used to realize the connection between these components. among them:

A group of computer programs are stored in the memory 1202, and the processor 1201 is configured to call the computer programs stored in the memory 1202 to perform the following operations:

Receiving first control information, where the first control information includes indication information for reserving resources;

Determining, according to the first control information, whether the reserved resource corresponding to the indication information is a candidate resource;

The processor 1201 controls the output interface 1204 for sending the first data packet according to the candidate resource.

In an embodiment, the processor 1201 controlling the output interface 1204 to send the first data packet according to the candidate resource includes:

The processor 1201 determines a transmission resource from the candidate resources;

The processor 1201 controls the output interface 1204 to use the transmission resource to send the first data packet.

In an embodiment, the indication information may be information of reserved resources based on HARQ feedback.

In one embodiment, the indication information may be information about the reserved resources for the retransmission in the initial transmission, or information about the reserved resources for the second retransmission in the first retransmission, or the initial transmission of the second data packet or Retransmit the information about the reserved resources for the initial transmission of the third data packet, or the information about the reserved resources for the transmission based on HARQ feedback for the transmission of blind transmission, or the reservation of the transmission based on blind transmission for the transmission based on HARQ feedback Resource information.

In an embodiment, the first control information may further include information about the time slot where the reserved resource is located. The processor 1201 determining whether the reserved resource corresponding to the indication information belongs to the candidate resource according to the first control information includes:

When the second control information and/or the data packet scheduled by the second control information is not detected in the time slot where the reserved resource is located, it is determined that the reserved resource corresponding to the indication information belongs to the candidate resource, and the second control information and/or second control information The resource occupied by the data packet of the information scheduling is the reserved resource corresponding to the indication information; or,

In an embodiment, the processor 1201 determines the reserved resource corresponding to the indication information and/or the indication information included in the second control information according to the detected first control information and/or the signal quality of the data packet scheduled by the first control information Whether the corresponding reserved resource is a candidate resource includes:

When the detected signal quality of the first control information and/or the data packet scheduled by the first control information is less than the first threshold, determine the reserved resource corresponding to the indication information and/or the reserved resource corresponding to the indication information included in the second control information. The reserved resources are candidate resources.

In an embodiment, the first control information may further include location information of the first control information sending device, and the processor 1201 determining whether the reserved resource corresponding to the indication information belongs to the candidate resource according to the first control information includes:

In an embodiment, the processor 1201 determining whether the reserved resource corresponding to the indication information belongs to the candidate resource according to the first control information includes:

When the distance is greater than the first distance threshold and/or the signal quality is less than the second threshold, it is determined that the reserved resource corresponding to the indication information is a candidate resource, and the first distance threshold is the preset threshold or the minimum communication required by the first data packet M times the distance, where M is an integer greater than or equal to 1.

Detect the signal quality corresponding to the indication information on the physical layer feedback channel;

Probability of acquisition

In an embodiment, when the ratio of the current candidate resources to the total resources is less than the sixth threshold, the processor 1201 determining whether the reserved resources corresponding to the indication information belong to the candidate resources according to the first control information may further include:

Determine that the reserved resources corresponding to the indication information are the first reserved resources and the reserved resources with signal quality less than the seventh threshold are candidate resources, and the signal quality is the measured first control information and/or data scheduled by the first control information The signal quality of the packet; and/or

Determine that the reserved resources corresponding to the indication information are the first reserved resources, the reserved resources whose signal quality is greater than or equal to the seventh threshold, and the distance greater than the second distance threshold are candidate resources, and the distance is the first device determined according to the location information The distance from the sending device.

In an embodiment, the processor 1201 is configured to call a computer program stored in the memory 1202 to perform the following operations:

Update the value of the counter;

When the updated value of the counter is equal to the set value, select or reselect resources;

When the updated value of the counter is not equal to the set value, the processor 1201 controls the output interface 1204 to use the candidate resource to send the fourth data packet.

The control input interface 1203 receives feedback information for the first data packet;

When the feedback information is information used to indicate that the first data packet is successfully transmitted, update the value of the counter;

When the feedback information is the information used to indicate that the transmission of the first data packet fails, the value of the counter is kept unchanged.

In an embodiment, the selection or reselection of resources by the processor 1201 includes:

In an embodiment, the counter may include a first counter and a second counter, and the processor 1201 updating the value of the counter includes:

In an embodiment, the counter may include a first counter, a second counter, and a third counter, and the processor 1201 updating the value of the counter includes:

Wherein, step 601-step 602, step 1001-step 1002, and step 1004-step 1005 can be executed by the processor 1201 and memory 1202 in the communication device, and step 603, step 1003, and step 1006 can be executed by the processor in the communication device. 1201 controls the output interface 1204 to execute.

Among them, the first receiving unit 1101, the determining unit 1102, the updating unit 1104, the selecting unit 1105, and the holding unit 1107 can be implemented by the processor 1201 and the memory 1202 in the communication device, and the second receiving unit 1106 can be implemented by the processing in the communication device. The processor 1201 controls the input interface 1203 to implement, and the sending unit 1103 can be implemented by the processor 1201 in the communication device controlling the output interface 1204.

Based on the network architecture shown in FIG. 1, please refer to FIG. 13. FIG. 3 is a schematic structural diagram of another communication device disclosed in an embodiment of the present invention. As shown in FIG. 13, the communication device may include an input interface 1301, a logic circuit 1302, and an output interface 1303. The input interface 1301 and the output interface 1303 are connected through a logic circuit 1302. The input interface 1301 is used to receive information from other communication devices, and the output interface 1303 is used to output information to other communication devices. The logic circuit 1302 is used to perform operations other than the operations of the input interface 1301 and the output interface 1303, for example, to implement the functions implemented by the processor 1201 in the foregoing embodiment. Wherein, the communication device may be a device or a chip in the device. Among them, more detailed descriptions of the input interface 1301, the logic circuit 1302, and the output interface 1303 can be obtained directly by referring to the related description of the first device in the method embodiments shown in FIG. 6 and FIG. 10, and will not be repeated here.

The embodiment of the present invention also discloses a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the computer program runs, the communication method shown in FIG. 6 and FIG. 10 is implemented.

The specific implementations described above further describe the purpose, technical solutions and beneficial effects of this application in detail. It should be understood that the above are only specific implementations of this application and are not intended to limit the scope of this application. The protection scope, any modification, equivalent replacement, improvement, etc. made on the basis of the technical solution of this application shall be included in the protection scope of this application.

Claims

A communication method, characterized in that it comprises:

The first device receives first control information, where the first control information includes indication information for reserving resources;

Determining, by the first device, whether the reserved resource corresponding to the indication information belongs to a candidate resource according to the first control information;

The first device sends a first data packet according to the candidate resource.
The method according to claim 1, wherein the first device sending a first data packet according to the candidate resource comprises:

The first device determines a transmission resource from the candidate resources;

The first device uses the transmission resource to send the first data packet.
The method according to claim 1 or 2, wherein the indication information is information of reserved resources fed back based on HARQ for hybrid automatic repeat request.
The method according to claim 1 or 2, wherein the indication information is information about reserved resources for retransmission in the initial transmission, or information about reserved resources for the second retransmission in the first retransmission , Or the information about the reserved resources for the initial transmission or retransmission of the second data packet for the initial transmission of the third data packet, or the information about the reserved resources for the transmission based on HARQ feedback to the transmission of blind transmission, or the information based on the blind transmission The information of the reserved resources for transmission based on HARQ feedback is transmitted.
The method according to any one of claims 1 to 4, wherein the first control information further includes information about the time slot where the reserved resource is located, and the first device determines according to the first control information Whether the reserved resource corresponding to the indication information is a candidate resource includes:

When the second control information and/or the data packet scheduled by the second control information is not detected on the time slot where the reserved resource is located, the first device determines that the reserved resource corresponding to the indication information belongs to the Candidate resource, the resource occupied by the second control information and/or the data packet scheduled by the second control information is the reserved resource corresponding to the indication information; or,

When the second control information and/or the data packet scheduled by the second control information is detected on the time slot where the reserved resource is located, the first device is based on the detected first control information and/or the data packet. The signal quality of the data packet scheduled by the first control information determines whether the reserved resource corresponding to the indication information and/or the reserved resource corresponding to the indication information included in the second control information is a candidate resource.
The method according to claim 5, wherein the first device determines that the indication information corresponds to the detected first control information and/or the signal quality of the data packet scheduled by the first control information Whether the reserved resources corresponding to the reserved resources and/or the indication information included in the second control information belong to candidate resources includes:

When the detected signal quality of the first control information and/or the data packet scheduled by the first control information is less than a first threshold, the first device determines the reserved resource and/or corresponding to the indication information The reserved resource corresponding to the indication information included in the second control information belongs to the candidate resource.
The method according to claim 5, wherein the first device determines that the indication information corresponds to the detected first control information and/or the signal quality of the data packet scheduled by the first control information Whether the reserved resources corresponding to the reserved resources and/or the indication information included in the second control information belong to candidate resources includes:

The first device determines that the first control information corresponding to the reserved resources corresponding to the indication information and/or the one or more reserved resources with the smallest signal quality of the data packets scheduled by the first control information belong to The candidate resource.
The method according to any one of claims 1 to 4, wherein the first control information further comprises location information of the first control information sending device, and the first device is based on the first control information Determining whether the reserved resource corresponding to the indication information is a candidate resource includes:

Determining, by the first device, the distance between the first device and the sending device according to the location information;

The first device determines that one or more reserved resources with the largest corresponding distance among the reserved resources corresponding to the indication information belong to the candidate resources.
The method according to any one of claims 1 to 4, wherein the first device determining whether the reserved resource corresponding to the indication information belongs to the candidate resource according to the first control information comprises:

Measuring, by the first device, the signal quality of the first control information and/or the data packet scheduled by the first control information;

The first device determines that one or more reserved resources with the smallest signal quality corresponding to the reserved resources corresponding to the indication information belong to the candidate resources.
The method according to any one of claims 1 to 4, wherein the first control information further comprises location information of the first control information sending device, and the first device is based on the first control information Determining whether the reserved resource corresponding to the indication information is a candidate resource includes:

Determining, by the first device, the distance between the first device and the sending device according to the location information;

Measuring, by the first device, the signal quality of the first control information and/or the data packet scheduled by the first control information;

When the distance is greater than the first distance threshold and/or the signal quality is less than the second threshold, the first device determines that the reserved resource corresponding to the indication information belongs to the candidate resource, and the first distance The threshold is a preset threshold or M times the minimum communication distance required by the first data packet, and the M is an integer greater than or equal to 1.
The method according to any one of claims 1 to 4, wherein the first device determining whether the reserved resource corresponding to the indication information belongs to the candidate resource according to the first control information comprises:

Measuring the signal quality corresponding to the indication information on the physical layer feedback channel by the first device;

When the signal quality is less than a third threshold or within a threshold range, the first device determines that the reserved resource corresponding to the indication information belongs to the candidate resource; or,

The first device determines that one or more reserved resources with the smallest signal quality among the reserved resources corresponding to the indication information belong to the candidate resources.
The method according to any one of claims 1 to 4, wherein the first device determining whether the reserved resource corresponding to the indication information belongs to the candidate resource according to the first control information comprises:

The first device acquisition probability;

The first device determines that the reserved resource corresponding to the indication information belongs to the candidate resource according to the probability, and the probability is determined by signaling configuration, or preconfiguration, or according to channel congestion degree and/or service attribute.
The method according to claim 12, wherein the probability is positively correlated with the degree of channel congestion.
The method according to any one of claims 1 to 4, wherein the reserved resource is a first reserved resource for HARQ retransmission or a second reserved resource for blind transmission, and the blind It is transmitted without HARQ feedback.
The method according to claim 14, wherein the first device determining whether the reserved resource corresponding to the indication information belongs to the candidate resource according to the first control information comprises:

Measuring, by the first device, the signal quality of the first control information and/or the data packet scheduled by the first control information;

When the reserved resource corresponding to the indication information is the first reserved resource, the first device determines that among the reserved resources corresponding to the indication information, the reserved resource whose signal quality is less than the fourth threshold belongs to all reserved resources. The candidate resources;

When the reserved resource corresponding to the indication information is the second reserved resource, the first device determines that among the reserved resources corresponding to the indication information, the reserved resource whose signal quality is less than the fifth threshold belongs to all reserved resources. The candidate resources.
The method according to claim 15, wherein when the ratio of the current candidate resources to the total resources is less than a sixth threshold, the first device determines the preset corresponding to the indication information according to the first control information. Whether reserved resources are candidate resources also includes:

The first device determines that the resources in the first resource set whose signal quality is less than the sum of the fourth threshold and the first step length belong to the candidate resources, and the first resource set is among the reserved resources corresponding to the indication information Resources other than the current candidate resources are the set of the first reserved resources;

The first device determines that the resources in the second resource set whose signal quality is less than the sum of the fifth threshold and the second step size belong to the candidate resources, and the second resource set is among the reserved resources corresponding to the indication information The resources other than the current candidate resources are the set of the second reserved resources.
The method according to claim 14, wherein the first control information further comprises location information of the first control information sending device, and the first device determines the indication information according to the first control information Whether the corresponding reserved resource is a candidate resource includes:

Determining, by the first device, a reserved resource that is the second reserved resource among reserved resources corresponding to the indication information as the candidate resource; and/or,

The first device determines, among the reserved resources corresponding to the indication information, that the reserved resources whose signal quality is the first reserved resource and whose signal quality is less than the seventh threshold are the candidate resources, and the signal quality is the measured The first control information and/or the signal quality of the data packet scheduled by the first control information; and/or,

The first device determines that among the reserved resources corresponding to the indication information, the reserved resources that are the first reserved resource, the signal quality is greater than or equal to the seventh threshold, and the reserved resources whose distance is greater than the second distance threshold are determined. For the candidate resource, the distance is a distance between the first device and the sending device determined according to the location information.
The method according to any one of claims 1-17, wherein the method further comprises:

The first device updates the value of the counter;

When the updated value of the counter is equal to the set value, the first device selects or reselects resources;

When the updated value of the counter is not equal to the set value, the first device uses the candidate resource to send a fourth data packet.
The method of claim 18, wherein the method further comprises:

Receiving, by the first device, feedback information for the first data packet;

When the feedback information is information used to indicate that the first data packet is successfully transmitted, the first device updates the value of the counter;

When the feedback information is information used to indicate that the transmission of the first data packet fails, the first device keeps the value of the counter unchanged.
The method according to claim 18 or 19, wherein the selection or reselection of resources by the first device comprises:

When the fourth data packet is a data packet retransmitted based on HARQ, the first device selects or reselects resources according to a first probability value;

When the fourth data packet is a data packet based on blind transmission, the first device selects or reselects resources according to a second probability value.
The method according to any one of claims 18-20, wherein the counter includes a first counter and a second counter, and updating the value of the counter by the first device comprises:

When the first data packet is a data packet retransmitted based on HARQ, the first device updates the value of the first counter;

When the first data packet is a blindly transmitted data packet, the first device updates the value of the second counter.
The method according to any one of claims 18-20, wherein the counter includes a first counter, a second counter, and a third counter, and updating the value of the counter by the first device includes:

When the first data packet is a unicast service data packet, the first device updates the value of the first counter;

When the first data packet is a data packet of a multicast service, the first device updates the value of the second counter;

When the first data packet is a data packet of a broadcast service, the first device updates the value of the third counter.
The method according to any one of claims 18-20, wherein the counter includes a first counter and a second counter, and updating the value of the counter by the first device comprises:

When the first data packet is a periodic service data packet, the first device updates the value of the first counter;

When the first data packet is a data packet of an aperiodic service, the first device updates the value of the second counter.
A communication device, characterized in that it comprises:

A first receiving unit, configured to receive first control information, where the first control information includes indication information for reserved resources;

A determining unit, configured to determine whether the reserved resource corresponding to the indication information belongs to a candidate resource according to the first control information;

The sending unit is configured to send the first data packet according to the candidate resource.
The device according to claim 24, wherein the sending unit is specifically configured to:

Determining a transmission resource from the candidate resources;

Sending the first data packet using the transmission resource.
The apparatus according to claim 24 or 25, wherein the indication information is information of reserved resources based on HARQ feedback.
The apparatus according to claim 24 or 25, wherein the indication information is information about reserved resources for retransmission for the first transmission, or information about reserved resources for the second retransmission for the first retransmission , Or the information about the reserved resources for the initial transmission or retransmission of the second data packet for the initial transmission of the third data packet, or the information about the reserved resources for the transmission based on HARQ feedback to the transmission of blind transmission, or the information based on the blind transmission The information of the reserved resources for transmission based on HARQ feedback is transmitted.
The device according to any one of claims 24-27, wherein the first control information further includes information about the time slot where the reserved resource is located, and the determining unit is specifically configured to:

When the second control information and/or the data packet scheduled by the second control information is not detected in the time slot where the reserved resource is located, determining that the reserved resource corresponding to the indication information belongs to the candidate resource, and The second control information and/or the resources occupied by the data packets scheduled by the second control information are reserved resources corresponding to the indication information; or,

When the second control information and/or the data packet scheduled by the second control information is detected on the time slot where the reserved resource is located, according to the detected first control information and/or the first control information The signal quality of the scheduled data packet determines whether the reserved resource corresponding to the indication information and/or the reserved resource corresponding to the indication information included in the second control information is a candidate resource.
A communication device, characterized by comprising a processor, a memory, an input interface and an output interface, the input interface is used to receive information from other communication devices other than the communication device, and the output interface is used to send When other communication devices other than the communication device output information, the processor invokes the computer program stored in the memory to implement the method according to any one of claims 1-23.
A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method according to any one of claims 1-23 is implemented.