CN111756487B - Resource reselection method, node equipment and resource reselection device - Google Patents

Abstract

The present invention provides a resource reselection method, node equipment and resource reselection device. The method includes: if a service packet sent by an upper layer is received at a target time, within a preset perception window after the target time, monitoring whether there is a resource conflict in the initial transmission or retransmission of the service packet; If there is a resource conflict in transmission or retransmission, resource reselection is triggered, and the target resource in the preset resource reselection window is selected as the transmission resource for initial transmission or retransmission of the service package; Initial transmission or retransmission. By using this method, by setting the preset perception window and the preset resource reselection window, it can solve the problem that in the prior art V2X communication protocol, when the initial transmission or retransmission resources of the service at time n collide with the resources in the resource selection window, it is impossible to Adjusting the selected initial transmission or retransmission resources leads to the problem of reduced reliability.

Description

Resource reselection method, node device and resource reselection device

technical field

The invention relates to the technical field of Internet of Vehicles, in particular to a resource reselection method, node equipment and resource reselection device.

Background technique

At present, in the Internet of Vehicles, based on the wireless access protocol, the carrier sense multiple access/collision avoidance (CSMA/CA) mechanism is adopted. After the carrier sense is busy, the access is delayed by random backoff to avoid resources collision, but the periodic characteristics of road safety services in the Internet of Vehicles are not considered, the reliability is low, and the spectrum utilization rate is low.

The Long Term Evolution-vehicle toeverything (LTE-V2X) technology based on 3GPP R14/R15 research takes into account the periodicity of basic road safety applications and the predictable size of service packets, and adopts perceptual reception and semi-persistent The scheduling method provides resource occupancy information, received signal power/received energy and other information for the resource selection process. However, using perception and one shot (One shot) for aperiodic services and still using received energy processing will result in inaccurate perception results. In addition, the LTE-V2X technology only supports broadcast services (broadcast), and does not support unicast (unicast) and multicast (groupcast) services.

The LTE-V2X technology no longer performs resource sensing after the service arrives at time n. If the initial retransmission resource of the burst service collides with the initial retransmission resource in the resource selection window at time n, the initial retransmission selected at time n cannot be detected. Adjustment of resources results in increased resource collision probability, reduced reliability, and low system spectrum utilization.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a resource reselection method, node equipment and resource reselection device, which are used to solve the problem of collision between the initial transmission or retransmission resources of the service at time n and the resources in the resource selection window in the prior art, and the The selected initial transmission or retransmission resources are adjusted, resulting in the problem of reduced reliability.

An embodiment of the present invention provides a resource reselection method, which is applied to a first node device, wherein the method includes:

If the service packet sent by the upper layer is received at the target time, within the preset perception window after the target time, monitor whether there is a resource conflict in the initial transmission or retransmission of the service packet;

If there is a resource conflict in the initial transmission or retransmission of the service package, triggering resource reselection, and selecting the target resource in the preset resource reselection window as the transmission resource for the initial transmission or retransmission of the service package;

The initial transmission or retransmission of the service packet is performed through the transmission resource.

An embodiment of the present invention provides a resource reselection method, which is applied to a second node device, wherein the method includes:

Receive the initial transmission data of the service packet sent by the first node device; wherein, when the first node sends the service packet, if in a preset perception window after the target time, monitor the initial transmission or retransmission of the service packet If there is a resource conflict in the transmission, resource reselection is triggered, and the target resource in the preset resource reselection window is selected as the transmission resource for initial transmission or retransmission of the service package;

If the initial transmission data of the service package is successfully received, the retransmission data reception of the target service package is abandoned;

If the initial transmission data of the target service package is not successfully received, try to receive the retransmission data of the service package within the duration of the preset time interval limit value after receiving the initial transmission data;

The preset time interval limit value is a time interval that needs to be satisfied between initial transmission and retransmission configured or preconfigured by the system.

An embodiment of the present invention provides a node device, where the node device is a first node device, including: a transceiver, a memory, a processor, and a program stored in the memory and executable on the processor; wherein , the processor executes the program to achieve the following steps:

If the service package sent by the upper layer is received at the target time, in the preset perception window after the target time, monitor whether there is a resource conflict in the initial transmission or retransmission of the service package;

If there is a resource conflict in the initial transmission or retransmission of the service package, triggering resource reselection, and selecting the target resource in the preset resource reselection window as the transmission resource for the initial transmission or retransmission of the service package;

The initial transmission or retransmission of the service packet is performed through the transmission resource.

An embodiment of the present invention provides a node device, where the node device is a second node device, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; wherein , the processor executes the program to achieve the following steps:

Receive the initial transmission data of the service packet sent by the first node device; wherein, when the first node sends the service packet, if in a preset perception window after the target time, monitor the initial transmission or retransmission of the service packet If there is a resource conflict in the transmission, resource reselection is triggered, and the target resource in the preset resource reselection window is selected as the transmission resource for initial transmission or retransmission of the service package;

If the initial transmission data of the service package is successfully received, the retransmission data reception of the target service package is abandoned;

If the initial transmission data of the target service package is not successfully received, try to receive the retransmission data of the service package within the duration of the preset time interval limit value after receiving the initial transmission data;

The preset time interval limit value is a time interval that needs to be satisfied between initial transmission and retransmission configured or preconfigured by the system.

An embodiment of the present invention provides a resource reselection apparatus, which is applied to a first node device, wherein the apparatus includes:

A monitoring module, configured to monitor whether there is a resource conflict in the initial transmission or retransmission of the service packet within a preset perception window after the target time if the service packet sent by the upper layer is received at the target time;

The reselection module is used to trigger resource reselection if there is a resource conflict in the initial transmission or retransmission of the service package, and select the target resource in the preset resource reselection window as the transmission of the initial transmission or retransmission of the service package resource;

A sending module, configured to perform initial transmission or retransmission of the service packet through the transmission resource.

An embodiment of the present invention provides a resource reselection apparatus, which is applied to a second node device, wherein the apparatus includes:

a receiving module, configured to receive the initial transmission data of the service package sent by the first node device; wherein, when the first node sends the service package, if it is in a preset perception window after the target time, the first node monitors the service package If there is a resource conflict in the initial transmission or retransmission of the service package, then resource reselection is triggered, and the target resource in the preset resource reselection window is selected as the transmission resource for the initial transmission or retransmission of the service package;

a first processing module, configured to abandon the reception of retransmission data of the target service package if the initial transmission data of the service package is successfully received;

A second processing module, configured to attempt to receive the retransmission data of the service package within the duration of the preset time interval limit value after receiving the initial transmission data if the initial transmission data of the target service package is not successfully received;

The preset time interval limit value is a time interval that needs to be satisfied between initial transmission and retransmission configured or preconfigured by the system.

An embodiment of the present invention provides a computer-readable storage medium, wherein, when the program is executed by a processor, the steps in any one of the resource reselection methods described above are implemented.

At least one of the above-mentioned technical solutions in the specific embodiment of the present invention has the following beneficial effects:

Using the resource reselection method according to the embodiment of the present invention, when the initial transmission or retransmission resources of the service package at the target time collide with the resources in the resource selection window, the service package can be sensed by using the sensing information in the preset sensing window. The resource conflict between the selected resource in the resource selection window and the burst service in the preset sensing window is used to reselect the resource for the service at the target time, so as to improve the reliability of the system and improve the spectrum utilization rate. In the prior art, when the initial transmission or retransmission resources of the service at time n collide with the resources in the resource selection window, the selected initial transmission or retransmission resources cannot be adjusted, resulting in a problem of reduced reliability.

Description of drawings

FIG. 1 is a schematic flowchart of a resource reselection method according to an embodiment of the present invention;

FIG. 2 is one of the sequence diagrams of sending a service packet by adopting a resource reselection method according to an embodiment of the present invention;

Fig. 3 is the second sequence diagram of service packet sending by adopting the resource reselection method according to the embodiment of the present invention;

FIG. 4 is a schematic flowchart of step S110 in the method shown in FIG. 1;

FIG. 5 is a schematic flowchart of step S120 in the method shown in FIG. 2;

6 is a schematic flowchart of a resource reselection method according to another embodiment of the present invention;

Fig. 7 is the second sequence diagram of service packet sending by adopting the resource reselection method according to the embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a node device according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a node device according to another embodiment of the present invention;

10 is a schematic structural diagram of a resource reselection apparatus according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a resource reselection apparatus according to another embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided merely to assist in a comprehensive understanding of embodiments of the present invention. Accordingly, it should be apparent to those skilled in the art that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It is to be understood that reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic associated with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the size of the sequence numbers of the following processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, rather than the implementation of the present invention The implementation of the examples constitutes no limitation.

Additionally, the terms "system" and "network" are often used interchangeably herein.

In the embodiments provided in this application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is only determined according to A, and B may also be determined according to A and/or other information.

The resource reselection method according to the specific embodiment of the present invention can solve the problem that in the prior art V2X communication protocol, when the initial transmission or retransmission resources of the service at time n collide with the resources in the resource selection window, the selected initial transmission cannot be Or retransmission resources are adjusted, resulting in a problem of reduced reliability.

One of the resource reselection methods according to the embodiments of the present invention is applied to the first node device. As shown in FIG. 1 , the method includes:

S110, if the service package sent by the upper layer is received at the target time, within a preset perception window after the target time, monitor whether there is a resource conflict in the initial transmission or retransmission of the service package;

S120, if there is a resource conflict in the initial transmission or retransmission of the service package, trigger resource reselection, and select the target resource in the preset resource reselection window as the transmission resource for the initial transmission or retransmission of the service package;

S130: Perform initial transmission or retransmission of the service packet through the transmission resource.

Using the resource reselection method according to the embodiment of the present invention, when transmitting service packets between node devices, a preset perception window and a preset resource reselection window are added, and after receiving the service packets sent by the upper layer at the target time, the The preset perception window after the time monitors whether there is a resource conflict between the initial transmission and retransmission of the service package. If there is a resource conflict, resource reselection is triggered, and resource selection is performed in the preset resource reselection window to perform service package selection. Initial transmission or retransmission.

In this way, when the initial transmission or retransmission resources of the service package at the target time collide with the resources in the resource selection window, the sensing information in the preset sensing window can be used to sense the selection of the service package in the resource selection window. The resource conflict between the resource and the burst service in the preset sensing window is used to perform resource reselection for the service at the target time, so as to achieve the purpose of improving system reliability and improving spectrum utilization rate.

It should be noted that, the target time may be a set time in the process of transmitting the service packet by the first node device, or any time.

In the embodiment of the present invention, the preset sensing window may also be defined as a short-term sensing (Short-term sensing, STS) window; the preset resource reselection window may also be defined as a re-allocation window (Re-allocation window, RW). That is, the STS window mentioned below corresponds to the preset sensing window in the present invention, and the mentioned RW corresponds to the preset resource reselection window in the present invention.

In this embodiment of the present invention, the defined preset resource reselection window and preset sensing window may be determined by adopting the following rules:

For the preset resource reselection window, the resource selection range of the preset resource reselection window is: [m+T1,n+T2];

Wherein, m represents the triggering resource reselection time, n represents the target time; T1 is the first preset delay time, T2 is the second preset delay time; wherein T2 is greater than T1.

That is, specifically, the starting time of the RW is: the time when the first preset delay duration is increased from the moment when the resource reselection is triggered;

The end time of the preset resource re-selection window is: the second preset delay time is increased from the target time.

Optionally, based on the preset resource reselection window determined by the above rule, the method further includes:

If the retransmission of the service package is performed in the preset sensing window, the start time of the preset resource reselection window is updated according to the triggering resource reselection moment of the last retransmission, that is, the above m is updated.

For the preset sensing window, in one embodiment, the time range of the preset sensing window is: [n+T1, W];

Wherein, n represents the target time, T1 represents the first preset delay duration, and W represents the retransmission sending time of the last retransmission selected by the service package resource at time n.

That is, specifically, the starting time of the STS window is: from the target moment, the time of increasing the first preset delay time;

The end time is: the retransmission sending time of the last retransmission of the service package resource selection at the target moment.

Optionally, in the embodiment of the present invention, in another implementation manner of determining the preset sensing window, the time range of the preset sensing window is: [n+T1, W−T3 _delay ].

Among them, n represents the target time, T1 represents the first preset delay time, W represents the retransmission sending time of the last retransmission selected by the service package resource at time n; T3 _delay represents the third preset delay duration.

That is, in this embodiment, the start time of the STS window is: the time that the first preset delay time is increased from the target time;

The end time is: the time of the third preset delay time before the retransmission sending time of the last retransmission of the service package resource selection at the target time.

The end time of the STS window determined by this embodiment is compared with the end time of the STS window determined in the previous embodiment. Considering the influence of the transmission processing delay, the end time of the STS window is determined as the target time service package resource selection. The time of the third preset delay time before the retransmission sending time of the last retransmission.

In one of the embodiments of the present invention, optionally, the third preset delay duration may be equal to the first preset delay duration, that is, T3 _delay is equal to T1, and the third preset delay is directly determined according to the sending processing delay Of course, in addition to considering the influence of the sending processing delay, the third preset delay time length can also be comprehensively determined by considering other influencing factors.

In this embodiment of the present invention, the T1, T2, and T3 _delays may be determined by high-level configuration or pre-configuration, or may be system default parameters.

Optionally, based on the STS window determined by the above-mentioned regulation, the method further includes:

If the service packet is retransmitted in the preset sensing window, the end time of the preset sensing window is updated according to the retransmission sending time of the last retransmission.

For example, when the T3 _delay is set to zero, as shown in Figure 2, for the received time packet sent by the upper layer at time n, first determine the STS window 1, the start time of the STS window 1 is n+T1, The end time is determined according to the last retransmission at time n, that is, W1; when the initial transmission of the service package at time n fails and the resource reselection of the service package is triggered, the end time of the STS window is re-determined and determined according to the resource reselection. The end time of the STS window is determined at the last retransmission sending time, which corresponds to STS window 2, that is, the end time is W2.

For the preset resource reselection window, first, if the reselection is triggered at time m1, the start time of the preset resource reselection window is determined to be m1+T1, and the end time of the preset resource reselection window is n+T2, corresponding to determining is RW1; after retransmission is triggered at time m2, the start time of the preset resource reselection window is changed to m2+T1, which is correspondingly determined to be RW2.

In the case where the end time of the STS window is determined to be the time of the third preset delay time before the retransmission time of the last retransmission selected by the service package resource at the target moment, as shown in Figure 3, the STS window 1 The start time is n+T1, and the end time of STS window 1 is the time T3 _delay that is the third preset delay time before the retransmission transmission time W1 of the last retransmission selected according to the service packet resources, that is, W1-T3 _delay ; after redetermining the end time of the STS window, the end time of the STS window 2 is the time T3 of the third preset delay duration before the end time W2 of the STS window is determined according to this last retransmission transmission time determined by resource reselection _delay , which is W2-T3 _delay . It should be noted that, in the resource reselection method according to the embodiment of the present invention, after receiving the service packet sent by the upper layer at the target time, the process of adding a preset perception window and a preset resource reselection window to perform resource reselection still needs to consider the current situation. There is no conflict between the sensing window defined in the prior art and the sensing mechanism of the sensing window in the prior art.

In the method for resource reselection according to the embodiment of the present invention, optionally, as shown in FIG. 4 , in step S110, monitoring whether there is a resource conflict in the initial transmission or retransmission of the service package includes:

S111, decode the sidelink control information (Sidelink Control Information, SCI), and determine the periodic/aperiodic service according to the DATA time-frequency resource information of the initial transmission or retransmission of the periodic/aperiodic service indicated in the SCI Whether there is a resource conflict between the initial retransmission of the service package and the initial transmission or retransmission of the service package, obtain the first monitoring result;

S112, judging whether the feedback information fed back by the hybrid automatic retransmission request HARQ has a resource conflict with the initial transmission or retransmission resources in the resource selection window corresponding to the service package at the target time, and obtain a second monitoring result;

S113, decode the random access preamble preamble, determine whether the preamble of the periodic/aperiodic service has a resource conflict with the initial transmission or retransmission resources in the resource selection window corresponding to the service package at the target moment, and obtain a third monitoring result;

S114: If at least one of the first monitoring result, the second monitoring result and the third monitoring result is that there is a resource conflict, determine that there is a resource conflict in the initial transmission or retransmission of the service package.

According to the above monitoring conditions of steps S111 to S113, if there is a resource conflict according to at least one of the judgment results, it is determined that there is a resource conflict between the initial transmission or retransmission of the service packet at time n and the perceived use resource in the STS window, and the resource is triggered. reselection.

On the other hand, if there is no resource conflict in any monitoring result according to the monitoring conditions in steps S111 to S113, it is determined that resource reselection does not need to be triggered, and resource conflict monitoring is continued.

Through the above method, in the STS window, the perception mechanism of the sensing window in the prior art is reused, and the feedback information for HARQ feedback and the resource conflict monitoring of the resources used by the Preamble are added to avoid the initial transmission or retransmission resources of the service at time n. The resources in the resource selection window collide, resulting in the problem of low reliability of service transmission.

In one implementation manner of the resource reselection method according to the embodiment of the present invention, optionally, as shown in FIG. 5 , in step S120, the target resource in the preset resource reselection window is selected as the initial transmission or re-selection of the service package The transmitted transmission resources, including:

S121, determining excluded resources that need to be excluded in the preset resource reselection window;

S122, according to the excluded resources, determine a set of candidate resources in the preset resource reselection window that can be used for initial transmission or retransmission of the service packet;

S123: Select the target resource for initial transmission or retransmission of the service packet from the candidate resource set.

According to the above, after receiving the service package sent by the upper layer at time n, the resource selection range of the preset resource reselection window can be determined as follows according to the description about the determination method of the preset resource reselection window: [m+T1,n+T2] . In the embodiment of the present invention, in step S120, before determining the transmission resources in the preset resource reselection window that can be used for initial transmission or retransmission of service packets, the starting time and the ending time of the preset resource reselection window are determined according to the preset resource reselection window. All the limited time-frequency resources are determined as available resources, and on this basis, by further determining the transmission resources that cannot be used for the initial transmission or retransmission of the service packet, that is, the resources that need to be excluded are determined as excluded resources, and preset resources are selected. The time-frequency resources other than the excluded resources determined in the time-frequency resources defined by the start time and the end time of the reselection window are a set of candidate resources, which are used for the target resources of the initial transmission or retransmission of the service packet. choose.

Optionally, in this embodiment of the present invention, in step S121, the determining of excluded resources to be excluded in the preset resource reselection window includes:

The first elimination step: according to the resource selection window corresponding to the service package at the target time, determine that among the time-frequency resources defined by the start time and end time of the preset resource reselection window, the occupied resources are the Exclude resources; specifically, according to the time-frequency resources limited by the preset resource re-selection window, the resource information can be searched in the resource selection window to determine the corresponding occupancy. If it is determined that the corresponding resource is occupied in the resource selection window, the corresponding The resources in the default resource re-selection window are excluded resources;

The second elimination step: if there is a resource conflict in the retransmission of the service packet, determine, among the time-frequency resources defined by the start time and end time of the preset resource reselection window, all the resources within the preset perception window. The resource corresponding to the sending subframe is the excluded resource; if there is a resource conflict in the initial transmission of the service packet, the exclusion of the sent subframe in the preset perception window may not be considered;

The third elimination step: according to the random access preamble preamble sensed in the preset sensing window, mapping to the preset resource reselection window, and according to the random access preamble preamble and control SA information and data DATA The time-frequency position relationship between the information, determine that in the time-frequency resources limited by the start time and end time of the preset resource reselection window, the resources occupied by the SA information and the DATA information are the excluded resources. At the same time, if the transmission of the service package is a unicast service or a multicast service, determine the time-frequency resources defined by the start time and end time of the preset resource reselection window, the feedback information of the DATA information The occupied resources are the excluded resources;

Specifically, when the preamble sensed in the preset sensing window is mapped into the preset resource reselection window, the occupancy of SA/DATA is determined according to the time-frequency positional relationship between the preamble and SA/DATA, and if the service packet is sent For unicast/groupcast, it is necessary to judge the occupancy of the feedback information of the DATA information. If it is judged to be occupied, the corresponding resource is determined to be an excluded resource.

Fourth elimination step: determining the time-frequency resources defined by the start time and the end time of the preset resource re-selection window, the resources sensed in the preset perception window need to be re-selected in the preset resource. The resources mapped in the window or the resources that need to be mapped in the multiple reserved resources of the preset resource reselection window are the excluded resources.

Specifically, in the above-mentioned fourth exclusion step, the multiple reservation resources of the preset resource reselection window are also based on the periodic service package. According to the period sent by the service package, the resources need to be mapped to the resources behind the resource selection window. It can be understood that However, the reserved resource may be a resource mapped for multiple reservations (for example, it may be a maximum of 10 reservations in the prior art).

In this embodiment of the present invention, optionally, the fourth exclusion step may include:

The first exclusion sub-step: the periodic services in the preset sensing window are mapped in the preset resource reselection window or mapped in the preset resource reselection window according to the period indicated in the control SA information. Reserving the mapping resource in the resource multiple times, if the control SA information is successfully decoded and the RSRP value of the reference signal received power of the data DATA information exceeds a preset threshold, then determine that the mapping resource is the excluded resource;

Specifically, if the periodic service in the preset sensing window is mapped to the resource reselection window or multiple reserved resources of the resource reselection window according to the period indicated in the SA, the SA decoding is successful and the RSRP value of the DATA exceeds the threshold, the determination is made. The mapping resource is occupied, and the mapping resource is an excluded resource;

The second exclusion sub-step: for aperiodic services within the preset sensing window, if the resource for service packet retransmission is located within the preset resource reselection window, the long-term sensing (Long-term sensing window, LTS) window At least one of the initial transmission and retransmission of the aperiodic service, the decoding of the control SA information is successful, and the decoding of the control SA information is successful, and the RSRP value of the reference signal received power of the data DATA information exceeds the preset threshold, then determine the described The mapping resource is the exclusion resource, and if the aperiodic service is a unicast service or a multicast service, determine that the mapping resource corresponding to the feedback resource of the DATA information is the exclusion resource;

Specifically, if the retransmission of the aperiodic service in the preset sensing window falls within the resource reselection window, the initial retransmission of the aperiodic service in the LTS window has a successful SA decoding, and the RSRP of the DATA exceeds the threshold, the retransmission is determined. If the corresponding mapping resource is occupied, it is an excluded resource, and if the aperiodic service is a unicast service or a multicast service, it is considered that the mapping resource corresponding to the corresponding feedback resource is also occupied and belongs to an excluded resource.

The third exclusion sub-step: determining the time-frequency resources defined by the start time and the end time of the preset resource reselection window, and confirming that the occupied time-frequency resources in the preset resource reselection window are the excluded time-frequency resources resource;

Fourth exclusion sub-step: if the service package to be sent is a periodic service, the resources selected in the preset resource reselection window are sent to the preset resource reselection window according to the service period of the service package. If there is a resource conflict in the mapping resources of the multiple reserved resource mappings, determine that the mapping resource is the excluded resource, and if the periodic service is a unicast service or a multicast service, determine that the feedback resource of the service package corresponds to The mapped resource is the excluded resource;

Specifically, if the service package sent this time is a periodic service, the resources selected in the preset resource reselection window are mapped to the preset resource reselection window for multiple preset resource mappings according to the service cycle. It is considered that the mapping resource is occupied and belongs to the excluded resource; meanwhile, if the periodic service is a unicast service or a multicast service, the mapping resource corresponding to the feedback resource of the service package is determined to be the excluded resource.

The fifth exclusion sub-step: if the service packet to be sent is an aperiodic service, determine when a resource conflict occurs between the resources for initial transmission and retransmission of the service packet and the time-frequency resources in the preset resource reselection window Exclude resources for the described.

In the resource reselection method according to the embodiment of the present invention, by performing the above-mentioned first exclusion step to fourth exclusion step in sequence, it is possible to determine the transmission resources that cannot be used for the initial transmission or retransmission of the service packet, that is, the transmission resources that need to be excluded. resource. On this basis, candidates that can be used for initial transmission or retransmission of the service packet can be determined according to the time-frequency resources defined by the start time and end time of the preset resource reselection window and the determined excluded resources Collection of resources.

The above process of determining the exclusion of resources in the preset resource reselection window takes into account the characteristics of service packet transmission of periodic services and aperiodic services, and the current 5G New Radio (NR) needs to support unicast and multicast services, corresponding to The resource occupancy of different types of service packages is excluded, and the HARQ feedback mechanism and preamble access mechanism are introduced to be applicable to periodic and aperiodic services, and to support any type of unicast/multicast/broadcast services, to effectively resolve the impact of business emergencies, to support rapid reduction of resource collisions, and to improve the reliability of service package delivery.

Optionally, in one of the embodiments of the present invention, in step S122, according to the excluded resources, determine candidate resources in the preset resource reselection window that can be used for initial transmission or retransmission of the service packet Collection, including:

determining whether the ratio of the remaining resources other than the excluded resources in the preset resource reselection window to the total time-frequency resources in the preset resource reselection window is greater than a first preset value;

If the ratio is greater than or equal to the first preset value, determining that the remaining resources in the preset resource reselection window except the excluded resources are the candidate resource set;

If the ratio is smaller than the first preset value, the RSRP threshold value of the reference signal received power in the resource selection process is increased by a second preset value, and the excluded resource is re-determined.

Specifically, using the above method, if it is determined that the ratio of the remaining resources in the preset resource reselection window to the total time-frequency resources in the preset resource reselection window is greater than the first preset value, if it is 0.2, the resource exclusion and division are completed. Determine the candidate resource set; if the calculated ratio is less than or equal to the first preset value, it is necessary to increase the RSRP threshold value in the resource selection process by a second preset value, such as 3dB, re-execute the above step S121 .

Optionally, in another implementation manner of the embodiment of the present invention, in step S122, according to the excluded resources, determine candidate resources in the preset resource reselection window that can be used for initial transmission or retransmission of the service packet Collection, including:

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is greater than or equal to the third preset value, and the preset resource reselection window is If the ratio of the remaining resources other than the excluded resources to the total time-frequency resources of the preset resource reselection window is greater than or equal to the first preset value, then it is determined that the preset resource reselection window excluding the excluded resources The remaining resources are the candidate resource set;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is greater than or equal to the third preset value, and the preset resource reselection window is If the ratio of the remaining resources except the excluded resources to the total time-frequency resources of the preset resource reselection window is less than the first preset value, the RSRP threshold value of the reference signal received power in the resource selection process is increased by a second Default value, re-determine the excluded resource;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is less than the third preset value, determine that the preset resource reselection window is divided into The remaining resources other than the excluded resources are the candidate resource set.

Specifically, using the above method, considering the proportional relationship between the preset resource reselection window and the resource selection window, if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window is greater than or equal to the third preset value, If it is 0.2, it is necessary to further determine whether the ratio of the remaining resources in the preset resource reselection window to the total time-frequency resources in the preset resource reselection window is greater than the first preset value, and if it is greater than the first preset value, determine whether The remaining resources in the preset resource reselection window except the excluded resources are the candidate resource set. If it is less than or equal to the first preset value, the RSRP threshold value in the resource selection process needs to be increased by a second. If the preset value is 3dB, perform the above step S121 again;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window is smaller than the third preset value, determine the remaining resources in the preset resource reselection window except the excluded resources as the candidate resource set .

In one implementation manner of the embodiments of the present invention, optionally, in step S123, the selecting the target resource for initial transmission or retransmission of the service packet in the candidate resource set includes:

A resource is directly selected from the candidate resource set at random as the target resource.

In another implementation manner of the embodiment of the present invention, optionally, in step S123, the selecting the target resource for initial transmission or retransmission of the service packet in the candidate resource set includes:

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is greater than or equal to the third preset value, skip the Received Signal Strength Indication (Received Signal Strength Indication, RSSI) measurement and smoothing process, according to the preset time interval limit value of initial transmission and retransmission of the service packet, randomly select resources as the target resources in the candidate resource set;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is less than the third preset value, and the resources in the candidate resource set are greater than or equal to When the service package initially transmits or retransmits resources this time, randomly select resources from the candidate resource set as the target resources;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is less than the third preset value, and the resources in the candidate resource set are less than the When the service package is initially transmitted or retransmitted resources this time, the current transmission of the service package is abandoned.

Specifically, in the above-mentioned embodiment, the proportional relationship between the preset resource reselection window and the resource selection window is considered: when the ratio between the length of the preset resource reselection window and the length of the resource selection window is greater than or equal to the third preset value When the RSSI measurement and smoothing process is not performed, only the preset time interval limit value for initial transmission and retransmission of the service packet is required, and the resource is randomly selected as the target in the candidate resource set determined according to the preset resource reselection window. resource;

When the ratio between the length of the preset resource reselection window and the length of the resource selection window is less than the third preset value, and the resources in the candidate resource set are greater than or equal to the initial transmission or retransmission resources of the service package this time , randomly select a resource in the candidate resource set as the target resource, otherwise give up the current sending of the service package.

Optionally, in one implementation manner of the resource reselection method, based on the target resource determined above, the method further includes:

According to the target resource, determine whether the time interval of the initial transmission resource of the service package and the time interval of the retransmission resource meet the preset time interval limit value;

If the preset time interval limit value is not met, the target resource is reselected in the candidate resource set.

It should be noted that, the above-mentioned preset time interval limit value is determined according to the limitation of the node device's cache capacity. If step S123 in the embodiment of the present invention determines that in the target resource of the service package, the time interval between initial transmission and retransmission exceeds For the preset time interval limit value, step S123 needs to be performed again to select the target resource until the initial transmission resource and the retransmission resource that satisfy the conditions are formed.

It should be noted that the above-mentioned first preset value, second preset value, third preset value and preset time interval limit value may be determined by high-level configuration or pre-configuration, or may be system default parameters. Specifically, the size of the first preset value is considered to ensure that the candidate resource set has randomness when being selected, and avoiding continuous resource collision is a determining condition. The size of the second preset value is considered to reasonably increase the power threshold, which can quickly form Remaining optional resources and avoiding too fast power rise are the determining conditions. The size of the third preset value is considered to ensure the randomness of resources in the preset resource reselection window, and providing effective candidate resources is the determining condition.

In the embodiment of the present invention, further, the method further includes: if within the preset resource reselection window, the number of times of resource reselection of the service package exceeds a preset value, discarding the service package, or The target resource is randomly selected within the preset resource reselection window.

The pre-designed value may be set by the count value of the resource reselection counter, and the resource reselection counter may be set by high-level configuration, pre-configuration or system default parameters.

Using the resource reselection method described in the embodiment of the present invention, it is possible to support business models such as the periodical services in 5G NR V2X that may include predictable and unpredictable service packet sizes, and unpredictable service packets of aperiodic services, etc. It can support unicast and multicast services of 5G NR V2X, and fully consider the HARQ feedback mechanism and preamble access mechanism. The resource reselection method according to the embodiment of the present invention can reduce the resource collision between the resources selected in the resource selection window and the burst services perceived in the STS window by using the perception information of the STS window, and improve the system reliability and spectrum. utilization.

Another embodiment of the resource reselection method according to the embodiment of the present invention is applied to the second node device. As shown in FIG. 6 , the method includes:

S610: Receive initial transmission data of the service package sent by the first node device; wherein, when the first node sends the service package, if the first node monitors the initial transmission of the service package in a preset sensing window after the target time Or if there is a resource conflict in the retransmission, resource reselection is triggered, and the target resource in the preset resource reselection window is selected as the transmission resource for initial transmission or retransmission of the service package;

S620, if the initial transmission data of the service package is successfully received, then abandon the retransmission data reception of the target service package;

S630, if the initial transmission data of the target service package is not successfully received, try to receive the retransmission data of the service package within the duration of the preset time interval limit value after receiving the initial transmission data;

The preset time interval limit value is a time interval that needs to be satisfied between initial transmission and retransmission configured or preconfigured by the system.

Using the resource reselection method described in the embodiment of the present invention, the second node device that receives the service packet sent by the first node device can perform receiving processing on the corresponding resource according to the time-frequency resource indicated in the SA of the received service packet. When the first node device sends a service packet, when there is a resource conflict in the initial transmission or retransmission of the service packet in the preset sensing window, as shown in FIG. 7 , resource reselection is triggered, so if the second node device If only the initial transmission or partial retransmission of the service package sent by the first node device is received, information cannot be received on the corresponding resources according to the time-frequency resources for subsequent transmission indicated in the SA of the received service package.

Based on the resource reselection method described in the embodiment of the present invention, the second node device serving as the receiving end performs the following processing:

If the initial transmission has been successfully received, subsequent retransmission reception processing may not be considered;

If the initial transmission is not successfully received, try to receive the retransmission sent after resource reselection within the preset time interval limit between the initial transmission and the retransmission, and according to the initial transmission or other retransmission time-frequency resources indicated in the retransmission and other information, and combine the received initial retransmission information of the same service package.

Therefore, in the method for resource reselection according to the embodiment of the present invention, in step S630, within the duration of the preset time interval limit value after receiving the initial transmission data, after receiving the retransmission data of the service packet, the method further includes:

According to the time-frequency resource information of initial transmission or retransmission indicated in the retransmission data, the received initial transmission data and retransmission data corresponding to the target service packet are combined and processed.

As shown in FIG. 8, an embodiment of the present invention further provides a node device, including: a processor 801; and a memory 803 connected to the processor 801 through a bus interface 802, where the memory 803 is used to store the processing The processor 801 calls and executes the programs and data stored in the memory 803 to obtain the programs and data used by the processor 801 when performing operations.

Wherein, the transceiver 804 is connected with the bus interface 802, and is used for receiving and sending data under the control of the processor 801. Specifically, the processor 801 is used to read the program in the memory 803, and execute the following process:

If the service package sent by the upper layer is received at the target time, in the preset perception window after the target time, monitor whether there is a resource conflict in the initial transmission or retransmission of the service package;

If there is a resource conflict in the initial transmission or retransmission of the service package, triggering resource reselection, and selecting the target resource in the preset resource reselection window as the transmission resource for the initial transmission or retransmission of the service package;

The initial transmission or retransmission of the service packet is performed through the transmission resource.

Optionally, in the node device, the start time of the preset resource reselection window is: a time that increases the first preset delay duration from the moment when the resource reselection is triggered;

The end time of the preset resource re-selection window is: the second preset delay time is increased from the target time;

Wherein, the second preset delay time is greater than the first preset delay time.

Optionally, in the node device, the starting time of the preset sensing window is: the time when the first preset delay time is increased from the target time;

The end time of the preset perception window is: the retransmission sending time of the last retransmission selected by the service package resource at the target moment; or,

The end time of the preset perception window is: the time of the third preset delay time before the retransmission sending time of the last retransmission of the service package resource selection at the target time.

Optionally, in the node device, the processor 801 is further configured to:

If the service packet is retransmitted in the preset sensing window, the end time of the preset sensing window is updated according to the retransmission sending time of the last retransmission.

Optionally, in the node device, the processor 801 is further configured to:

If the retransmission of the service package is performed in the preset sensing window, the starting time of the preset resource reselection window is updated according to the time of triggering resource reselection of the last retransmission.

Optionally, in the node device, wherein the processor 801 monitors whether there is a resource conflict in the initial transmission or retransmission of the service packet, including:

Decode the straight-through link control information SCI, and determine whether the initial retransmission of periodic/aperiodic services is the same as that of the service according to the DATA time-frequency resource information of the initial transmission or retransmission of the periodic/aperiodic service indicated in the SCI. There is a resource conflict in the initial transmission or retransmission of the packet, and the first monitoring result is obtained;

Judging whether the feedback information fed back by the hybrid automatic repeat request HARQ has a resource conflict with the initial transmission or retransmission resources in the resource selection window corresponding to the service package at the target time, and obtains a second monitoring result;

Decoding the random access preamble preamble, judging whether the preamble of the periodic/aperiodic service has a resource conflict with the initial transmission or retransmission resources in the resource selection window corresponding to the service package described at the target time, and obtains the third monitoring result;

If at least one of the first monitoring result, the second monitoring result and the third monitoring result is that there is a resource conflict, it is determined that there is a resource conflict in the initial transmission or retransmission of the service packet.

Optionally, in the node device, wherein the processor 801 selects the target resource in the preset resource reselection window as the transmission resource for initial transmission or retransmission of the service packet, including:

determining the excluded resources that need to be excluded in the preset resource reselection window;

determining, according to the excluded resources, a set of candidate resources in the preset resource reselection window that can be used for initial transmission or retransmission of the service packet;

The target resource for initial transmission or retransmission of the service packet is selected from the candidate resource set.

Optionally, in the node device, wherein the processor 801 determines the excluded resources that need to be excluded in the preset resource reselection window, including:

According to the resource selection window corresponding to the service package at the target time, it is determined that among the time-frequency resources defined by the start time and the end time of the preset resource reselection window, the occupied resources are the excluded resources;

If there is a resource conflict in the retransmission of the service packet, determine, in the time-frequency resources defined by the start time and the end time of the preset resource reselection window, the phase of the subframe sent in the preset perception window. The corresponding resource is the excluded resource;

According to the random access preamble preamble sensed in the preset sensing window, map to the preset resource reselection window, and according to the time between the random access preamble preamble and the control SA information and the data DATA information frequency position relationship, determine that in the time-frequency resources defined by the start time and end time of the preset resource reselection window, the resources occupied by the SA information and the DATA information are the excluded resources. The transmission of the service package is a unicast service or a multicast service, and in the time-frequency resources defined by the start time and end time of the preset resource reselection window, the resources occupied by the feedback information of the DATA information are the excluded resource;

In the time-frequency resources defined by the start time and the end time of the preset resource reselection window, the resources perceived in the preset sensing window need to be mapped or required in the preset resource reselection window. The resources mapped in the multiple reserved resources of the preset resource reselection window are the excluded resources.

Optionally, in the node device, wherein the processor 801 determines the time-frequency resources defined by the start time and the end time of the preset resource reselection window, all the parameters in the preset perception window are The perceived resources, the mapping resources that need to be mapped in the preset resource reselection window or the mapped resources that need to be mapped in the multiple reserved resources of the preset resource reselection window are the excluded resources, including:

The periodic service in the preset perception window is mapped in the preset resource reselection window or in the multiple reserved resources of the preset resource reselection window according to the period indicated in the control SA information. mapping resources, if the control SA information is successfully decoded and the RSRP value of the reference signal received power of the data DATA information exceeds a preset threshold, the mapping resources are determined to be the excluded resources;

For the aperiodic service in the preset sensing window, if the resource for retransmission of the service package is located in the preset resource reselection window, at least one of the initial transmission and retransmission of the aperiodic service within the long-term sensing LTS window is detected. Once, the control SA information is successfully decoded, and the control SA information is successfully decoded, and the reference signal received power RSRP value of the data DATA information exceeds a preset threshold, then determine that the mapping resource is the exclusion resource, and if the aperiodic The service is a unicast service or a multicast service, and it is determined that the mapping resource corresponding to the feedback resource of the DATA information is the exclusion resource;

determining the time-frequency resources defined by the start time and the end time of the preset resource reselection window, and confirming that the occupied time-frequency resources in the preset resource reselection window are the excluded resources;

If the service package to be sent is a periodic service, the resources selected in the preset resource reselection window are mapped to the multiple reserved resources in the preset resource reselection window according to the service cycle of the service package. If there is a resource conflict in the mapping resources of the service package, then determine that the mapping resource is the exclusion resource, and if the periodic service is a unicast service or a multicast service, determine that the mapping resource corresponding to the feedback resource of the service package is the exclude resources;

If the service packet to be sent is an aperiodic service, it is determined that the resource for initial transmission and retransmission of the service packet conflicts with the time-frequency resource in the preset resource reselection window as the excluded resource.

Optionally, in the node device, wherein the processor 801 determines, according to the excluded resources, a set of candidate resources that can be used for initial transmission or retransmission of the service packet in the preset resource reselection window, include:

determining whether the ratio of the remaining resources other than the excluded resources in the preset resource reselection window to the total time-frequency resources in the preset resource reselection window is greater than a first preset value;

If the ratio is greater than or equal to the first preset value, determining that the remaining resources in the preset resource reselection window except the excluded resources are the candidate resource set;

If the ratio is smaller than the first preset value, the RSRP threshold value of the reference signal received power in the resource selection process is increased by a second preset value, and the excluded resource is re-determined.

Optionally, in the node device, wherein the processor 801 determines, according to the excluded resources, a set of candidate resources that can be used for initial transmission or retransmission of the service packet in the preset resource reselection window, include:

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is greater than or equal to the third preset value, and the preset resource reselection window is If the ratio of the remaining resources other than the excluded resources to the total time-frequency resources of the preset resource reselection window is greater than or equal to the first preset value, then it is determined that the preset resource reselection window excluding the excluded resources The remaining resources are the candidate resource set;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is greater than or equal to the third preset value, and the preset resource reselection window is If the ratio of the remaining resources except the excluded resources to the total time-frequency resources of the preset resource reselection window is less than the first preset value, the RSRP threshold value of the reference signal received power in the resource selection process is increased by a second Default value, re-determine the excluded resource;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is less than the third preset value, determine that the preset resource reselection window is divided into The remaining resources other than the excluded resources are the candidate resource set.

Optionally, in the node device, wherein the processor 801 selects the target resource for initial transmission or retransmission of the service packet in the candidate resource set, including:

A resource is directly selected from the candidate resource set at random as the target resource.

Optionally, in the node device, wherein the processor 701 selects the target resource for initial transmission or retransmission of the service packet in the candidate resource set, including:

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is greater than or equal to the third preset value, skip the RSSI measurement and smoothing processing of the received energy intensity indication process, according to the preset time interval limit value of initial transmission and retransmission of the service package, randomly select resources in the candidate resource set as the target resource;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is less than the third preset value, and the resources in the candidate resource set are greater than or equal to When the service package initially transmits or retransmits resources this time, randomly select resources from the candidate resource set as the target resources;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is less than the third preset value, and the resources in the candidate resource set are less than the When the service package is initially transmitted or retransmitted resources this time, the current transmission of the service package is abandoned.

Optionally, the node device, wherein the processor 801 executes the program is further configured to:

According to the target resource, determine whether the time interval of the initial transmission resource of the service package and the time interval of the retransmission resource meet the preset time interval limit value;

If the preset time interval limit value is not met, the target resource is reselected in the candidate resource set.

Optionally, the node device, wherein the processor 801 executes the program is further configured to:

If within the preset resource reselection window, the number of times of resource reselection of the service package exceeds a preset value, the service package is discarded, or the target resource is randomly selected within the preset resource reselection window .

It should be noted that, in FIG. 8 , the bus architecture may include any number of interconnected buses and bridges, specifically, one or more processors represented by the processor 801 and various circuits of the memory represented by the memory 803 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 804 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other devices over a transmission medium. For different terminals, the user interface 805 may also be an interface capable of externally connecting a required device, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like. The processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 may store data used by the processor 801 in performing operations.

Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned embodiments can be completed by hardware, or can be completed by instructing relevant hardware through a program, and the program includes instructions for executing part or all of the steps of the above-mentioned method; and The program may be stored in a readable storage medium, which may be any form of storage medium.

As shown in FIG. 9 , an embodiment of the present invention further provides a node device, including: a processor 901; and a memory 903 connected to the processor 901 through a bus interface 902, where the memory 903 is used to store the processing The processor 901 calls and executes the programs and data stored in the memory 903 to obtain programs and data used by the processor 901 when performing operations.

Wherein, the transceiver 904 is connected with the bus interface 902, and is used for receiving and sending data under the control of the processor 901. Specifically, the processor 901 is used to read the program in the memory 903, and execute the following process:

Receive the initial transmission data of the service packet sent by the first node device; wherein, when the first node sends the service packet, if in a preset perception window after the target time, monitor the initial transmission or retransmission of the service packet If there is a resource conflict in the transmission, resource reselection is triggered, and the target resource in the preset resource reselection window is selected as the transmission resource for initial transmission or retransmission of the service package;

If the initial transmission data of the service package is successfully received, the retransmission data reception of the target service package is abandoned;

If the initial transmission data of the target service package is not successfully received, try to receive the retransmission data of the service package within the duration of the preset time interval limit value after receiving the initial transmission data;

The preset time interval limit value is a time interval that needs to be satisfied between initial transmission and retransmission configured or preconfigured by the system.

Optionally, in the node device, the processor 901 is further configured to: after receiving the retransmission data of the service packet within the duration of the preset time interval limit value after receiving the initial transmission data:

According to the time-frequency resource information of initial transmission or retransmission indicated in the retransmission data, the received initial transmission data and retransmission data corresponding to the target service packet are combined and processed.

It should be noted that, in FIG. 9 , the bus architecture may include any number of interconnected buses and bridges, specifically, one or more processors represented by processor 901 and various circuits of memory represented by memory 903 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 904 may be multiple elements, ie, including transmitters and receivers, providing a means for communicating with various other devices over a transmission medium. For different terminals, the user interface 905 may also be an interface capable of externally connecting a desired device, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like. The processor 901 is responsible for managing the bus architecture and general processing, and the memory 903 may store data used by the processor 901 in performing operations.

Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned embodiments can be completed by hardware, or can be completed by instructing relevant hardware through a program, and the program includes instructions for executing part or all of the steps of the above-mentioned method; and The program may be stored in a readable storage medium, which may be any form of storage medium.

An embodiment of the present invention further provides a resource reselection apparatus, which is applied to a first node device, wherein, as shown in FIG. 10 , the apparatus includes:

The monitoring module 1010 is configured to monitor whether there is a resource conflict in the initial transmission or retransmission of the service packet within a preset perception window after the target time if the service packet sent by the upper layer is received at the target time;

The reselection module 1020 is configured to trigger resource reselection if there is a resource conflict in the initial transmission or retransmission of the service package, and select the target resource in the preset resource reselection window to be the initial transmission or retransmission of the service package. transmission resources;

The sending module 1030 is configured to perform initial transmission or retransmission of the service packet through the transmission resource.

The starting time of the preset resource reselection window is: from the moment when the resource reselection is triggered, the first preset delay time is increased;

The end time of the preset resource re-selection window is: the second preset delay time is increased from the target time;

Wherein, the second preset delay time is greater than the first preset delay time.

Optionally, in the resource reselection device, the start time of the preset perception window is: the time when the first preset delay time is increased from the target time;

The end time of the preset perception window is: the retransmission sending time of the last retransmission selected by the service package resource at the target moment; or,

The end time of the preset perception window is: the time of the third preset delay time before the retransmission sending time of the last retransmission of the service package resource selection at the target time.

Optionally, the resource reselection device, wherein the device further comprises:

The first updating module 1040 is configured to update the end time of the preset sensing window according to the retransmission sending time of the last retransmission if the service packet is retransmitted in the preset sensing window.

Optionally, the resource reselection device, wherein the device further comprises:

The second updating module 1050 is configured to update the start time of the preset resource reselection window according to the time of triggering resource reselection of the last retransmission if the retransmission of the service package is performed in the preset sensing window .

Optionally, in the resource reselection apparatus, wherein the monitoring module 1010 monitors whether there is a resource conflict in the initial transmission or retransmission of the service package, including:

Decode the straight-through link control information SCI, and determine whether the initial retransmission of periodic/aperiodic services is the same as that of the service according to the DATA time-frequency resource information of the initial transmission or retransmission of the periodic/aperiodic service indicated in the SCI. There is a resource conflict in the initial transmission or retransmission of the packet, and the first monitoring result is obtained;

Judging whether the feedback information fed back by the hybrid automatic repeat request HARQ has a resource conflict with the initial transmission or retransmission resources in the resource selection window corresponding to the service package at the target time, and obtains a second monitoring result;

Decoding the random access preamble preamble, judging whether the preamble of the periodic/aperiodic service has a resource conflict with the initial transmission or retransmission resources in the resource selection window corresponding to the service package described at the target time, and obtains the third monitoring result;

If at least one of the first monitoring result, the second monitoring result and the third monitoring result is that there is a resource conflict, it is determined that there is a resource conflict in the initial transmission or retransmission of the service packet.

Optionally, in the resource reselection apparatus, wherein the reselection module 1020 selects the target resource in the preset resource reselection window as the transmission resource for initial transmission or retransmission of the service package, including:

determining the excluded resources that need to be excluded in the preset resource reselection window;

determining, according to the excluded resources, a set of candidate resources in the preset resource reselection window that can be used for initial transmission or retransmission of the service packet;

The target resource for initial transmission or retransmission of the service packet is selected from the candidate resource set.

Optionally, in the resource reselection apparatus, wherein the reselection module 1020 determines the excluded resources that need to be excluded in the preset resource reselection window, including:

According to the resource selection window corresponding to the service package at the target time, it is determined that among the time-frequency resources defined by the start time and the end time of the preset resource reselection window, the occupied resources are the excluded resources;

If there is a resource conflict in the retransmission of the service packet, determine, in the time-frequency resources defined by the start time and the end time of the preset resource reselection window, the phase of the subframe sent in the preset perception window. The corresponding resource is the excluded resource;

According to the random access preamble preamble sensed in the preset sensing window, map to the preset resource reselection window, and according to the time between the random access preamble preamble and the control SA information and the data DATA information frequency position relationship, determine that in the time-frequency resources defined by the start time and end time of the preset resource reselection window, the resources occupied by the SA information and the DATA information are the excluded resources. The transmission of the service package is a unicast service or a multicast service, and in the time-frequency resources defined by the start time and end time of the preset resource reselection window, the resources occupied by the feedback information of the DATA information are the excluded resource;

In the time-frequency resources defined by the start time and the end time of the preset resource reselection window, the resources perceived in the preset sensing window need to be mapped or required in the preset resource reselection window. The resources mapped in the multiple reserved resources of the preset resource reselection window are the excluded resources.

Optionally, in the resource reselection apparatus, wherein the reselection module 1020 determines that in the time-frequency resources defined by the start time and the end time of the preset resource reselection window, the preset perception window The resources perceived within the resource that need to be mapped in the preset resource reselection window or the mapped resources that need to be mapped in the multiple reserved resources of the preset resource reselection window are the excluded resources, including:

The periodic service in the preset perception window is mapped in the preset resource reselection window or in the multiple reserved resources of the preset resource reselection window according to the period indicated in the control SA information. mapping resources, if the control SA information is successfully decoded and the RSRP value of the reference signal received power of the data DATA information exceeds a preset threshold, the mapping resources are determined to be the excluded resources;

For the aperiodic service in the preset sensing window, if the resource for retransmission of the service package is located in the preset resource reselection window, at least one of the initial transmission and retransmission of the aperiodic service within the long-term sensing LTS window is detected. Once, the control SA information is successfully decoded, and the control SA information is successfully decoded, and the RSRP value of the reference signal received power of the data DATA information exceeds a preset threshold, then determine that the mapping resource is the exclusion resource, and if the aperiodic The service is a unicast service or a multicast service, and it is determined that the mapping resource corresponding to the feedback resource of the DATA information is the exclusion resource;

determining the time-frequency resources defined by the start time and the end time of the preset resource reselection window, and confirming that the occupied time-frequency resources in the preset resource reselection window are the excluded resources;

If the service package to be sent is a periodic service, the resources selected in the preset resource reselection window are mapped to the multiple reserved resources in the preset resource reselection window according to the service cycle of the service package. If there is a resource conflict in the mapping resources of the service package, then determine that the mapping resource is the exclusion resource, and if the periodic service is a unicast service or a multicast service, determine that the mapping resource corresponding to the feedback resource of the service package is the exclude resources;

If the service packet to be sent is an aperiodic service, it is determined that the resource for initial transmission and retransmission of the service packet conflicts with the time-frequency resource in the preset resource reselection window as the excluded resource.

Optionally, in the resource reselection apparatus, wherein the reselection module 1020 determines, according to the excluded resources, candidates within the preset resource reselection window that can be used for initial transmission or retransmission of the service packet A collection of resources, including:

determining whether the ratio of the remaining resources other than the excluded resources in the preset resource reselection window to the total time-frequency resources in the preset resource reselection window is greater than a first preset value;

If the ratio is greater than or equal to the first preset value, determining that the remaining resources in the preset resource reselection window except the excluded resources are the candidate resource set;

If the ratio is smaller than the first preset value, the RSRP threshold value of the reference signal received power in the resource selection process is increased by a second preset value, and the excluded resource is re-determined.

Optionally, in the resource reselection apparatus, wherein the reselection module 1020 determines, according to the excluded resources, candidates within the preset resource reselection window that can be used for initial transmission or retransmission of the service packet A collection of resources, including:

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is greater than or equal to the third preset value, and the preset resource reselection window is If the ratio of the remaining resources other than the excluded resources to the total time-frequency resources of the preset resource reselection window is greater than or equal to the first preset value, then it is determined that the preset resource reselection window excluding the excluded resources The remaining resources are the candidate resource set;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is greater than or equal to the third preset value, and the preset resource reselection window is If the ratio of the remaining resources except the excluded resources to the total time-frequency resources of the preset resource reselection window is less than the first preset value, the RSRP threshold value of the reference signal received power in the resource selection process is increased by a second Default value, re-determine the excluded resource;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is less than the third preset value, determine that the preset resource reselection window is divided into The remaining resources other than the excluded resources are the candidate resource set.

Optionally, in the resource reselection apparatus, wherein the reselection module 1020 selects the target resource for initial transmission or retransmission of the service packet from the candidate resource set, including:

A resource is directly selected from the candidate resource set at random as the target resource.

Optionally, in the resource reselection method, wherein the reselection module 1020 selects the target resource for initial transmission or retransmission of the service packet from the candidate resource set, including:

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is greater than or equal to the third preset value, skip the RSSI measurement and smoothing processing of the received energy intensity indication process, according to the preset time interval limit value of initial transmission and retransmission of the service package, randomly select resources in the candidate resource set as the target resource;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is less than the third preset value, and the resources in the candidate resource set are greater than or equal to When the service package initially transmits or retransmits resources this time, randomly select resources from the candidate resource set as the target resources;

If the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service package at the target time is less than the third preset value, and the resources in the candidate resource set are less than the When the service package is initially transmitted or retransmitted resources this time, the current transmission of the service package is abandoned.

Optionally, in the resource reselection apparatus, wherein the reselection module 1020 is further configured to:

According to the target resource, determine whether the time interval of the initial transmission resource of the service package and the time interval of the retransmission resource meet the preset time interval limit value;

If the preset time interval limit value is not met, the target resource is reselected in the candidate resource set.

Optionally, in the resource reselection apparatus, wherein the reselection module 1020 is further configured to:

If within the preset resource reselection window, the number of times of resource reselection of the service package exceeds a preset value, the service package is discarded, or the target resource is randomly selected within the preset resource reselection window .

An embodiment of the present invention further provides a resource reselection apparatus, which is applied to a second node device. As shown in FIG. 11 , the apparatus includes:

The receiving module 1110 is configured to receive the initial transmission data of the service package sent by the first node device; wherein, when the first node sends the service package, if it is in a preset perception window after the target time, it monitors the service If there is a resource conflict in the initial transmission or retransmission of the packet, resource reselection is triggered, and the target resource in the preset resource reselection window is selected as the transmission resource for the initial transmission or retransmission of the service packet;

A first processing module 1120, configured to abandon the reception of retransmission data of the target service package if the initial transmission data of the service package is successfully received;

The second processing module 1130 is configured to, if the initial transmission data of the target service package is not successfully received, try to receive the retransmission data of the service package within the duration of the preset time interval limit value after receiving the initial transmission data;

The preset time interval limit value is a time interval that needs to be satisfied between initial transmission and retransmission configured or preconfigured by the system.

Optionally, in the resource reselection apparatus, the second processing module 1130, after receiving the retransmission data of the service packet within the duration of the preset time interval limit value after receiving the initial transmission data, further Used for:

According to the time-frequency resource information of initial transmission or retransmission indicated in the retransmission data, the received initial transmission data and retransmission data corresponding to the target service packet are combined and processed.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, each process of each embodiment of the above-mentioned resource reselection method is implemented , and can achieve the same technical effect, in order to avoid repetition, it is not repeated here. The computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk or an optical disk, and the like.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course hardware can also be used, but in many cases the former is better implementation. Based on this understanding, the technical solutions of the present invention can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products are stored in a storage medium (such as ROM/RAM, magnetic disk, CD), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present invention.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the spirit of the present invention and the scope protected by the claims, many forms can be made, which all belong to the protection of the present invention.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as It is the protection scope of the present invention.

Claims (35)

1. A resource reselection method is applied to a first node device, and is characterized in that the method comprises the following steps:

if the service packet sent by the upper layer is received at the target moment, monitoring whether resource conflict exists in initial transmission or retransmission of the service packet in a preset sensing window after the target moment;

if the initial transmission or retransmission of the service packet has resource conflict, triggering resource reselection, and selecting a target resource in a preset resource reselection window as a transmission resource for the initial transmission or retransmission of the service packet;

performing initial transmission or retransmission of the service packet through the transmission resource;

wherein, the starting time of the preset sensing window is as follows: increasing the time of a first preset delay time duration from the target time;

the end time of the preset sensing window is as follows: retransmission sending time of the last retransmission selected by the service packet resource at the target moment; or,

the end time of the preset sensing window is as follows: and the time of a third preset delay time length is before the retransmission sending time of the last retransmission selected by the service packet resource at the target moment.

2. The method of claim 1, wherein a starting time of the preset resource reselection window is: increasing the time of a first preset delay time duration from the moment of triggering the resource reselection;

the end time of the preset resource reselection window is as follows: increasing the time of a second preset delay time duration from the target time;

and the second preset delay time is longer than the first preset delay time.

3. The method of resource reselection according to claim 1, wherein said method further comprises:

and if the service packet is retransmitted in the preset sensing window, updating the end time of the preset sensing window according to the retransmission sending time of the last retransmission.

4. The resource reselection method of claim 2, further comprising:

and if the retransmission of the service packet is carried out in the preset sensing window, updating the starting time of the preset resource reselection window according to the triggering resource reselection time of the last retransmission.

5. The method for resource reselection according to claim 1, wherein the monitoring whether resource collision exists in the initial transmission or the retransmission of the service packet comprises:

decoding the control information SCI of the direct link, judging whether the initial retransmission of the periodic/aperiodic service conflicts with the initial transmission or retransmission of the service packet according to the DATA DATA time-frequency resource information of the initial transmission or retransmission of the periodic/aperiodic service indicated in the SCI, and obtaining a first monitoring result;

judging whether the feedback information fed back by the hybrid automatic repeat request HARQ has resource conflict with the initial transmission or retransmission resources in the resource selection window corresponding to the service packet at the target moment, and obtaining a second monitoring result;

decoding a preamble of the random access, judging whether the preamble of the periodic/non-periodic service has resource conflict with the initial transmission or retransmission resource in the resource selection window corresponding to the service packet at the target moment, and obtaining a third monitoring result;

and if at least one of the first monitoring result, the second monitoring result and the third monitoring result is that resource conflict exists, determining that resource conflict exists in initial transmission or retransmission of the service packet.

6. The method for resource reselection according to claim 1, wherein the selecting a target resource in a preset resource reselection window as a transmission resource for initial transmission or retransmission of the service packet comprises:

determining excluded resources needing to be excluded in the preset resource reselection window;

determining a candidate resource set which can be used for initial transmission or retransmission of the service packet in the preset resource reselection window according to the excluded resources;

and selecting the target resource for initial transmission or retransmission of the service packet in the candidate resource set.

7. The method for resource reselection according to claim 6, wherein the determining excluded resources to be excluded in the preset resource reselection window comprises:

determining occupied resources as excluded resources in time-frequency resources limited by the starting time and the ending time of the preset resource reselection window according to a resource selection window corresponding to the service packet at a target moment;

if the retransmission of the service packet has resource conflict, determining that the corresponding resource of the subframe sent in the preset sensing window is the excluded resource in the time-frequency resources limited by the starting time and the ending time of the preset resource reselection window;

mapping the random access preamble in the preset sensing window, determining the time-frequency resources defined by the starting time and the ending time of the preset resource reselection window according to the time-frequency position relationship between the random access preamble and the control SA information and the DATA DATA information, wherein the resources occupied by the SA information and the DATA information are the excluded resources, and determining the resources occupied by the feedback information of the DATA information in the time-frequency resources defined by the starting time and the ending time of the preset resource reselection window as the excluded resources if the transmission of the service packet is a unicast service or a multicast service;

determining, as the excluded resource, a resource that needs to be mapped in the preset resource reselection window or mapped in a multi-reserved resource of the preset resource reselection window, among the time-frequency resources defined by the start time and the end time of the preset resource reselection window, the resource sensed in the preset sensing window.

8. The method for resource reselection according to claim 7, wherein the determining that, of the time-frequency resources defined by the start time and the end time of the preset resource reselection window, the resource sensed in the preset sensing window is the excluded resource, where the resource needs to be mapped in the preset resource reselection window or mapped in multiple reserved resources of the preset resource reselection window, comprises:

the periodic service in the preset sensing window is mapped to the preset resource reselection window or mapped to a mapping resource in multiple reserved resources of the preset resource reselection window according to a period indicated in control SA information, and if the control SA information is decoded successfully and the Reference Signal Received Power (RSRP) value of DATA DATA information exceeds a preset threshold, the mapping resource is determined to be the excluded resource;

if the aperiodic service in the preset sensing window is located in the preset resource reselection window, and if the resource retransmitted by the service packet is located in the preset resource reselection window, at least one of initial transmission and retransmission of the aperiodic service in the long-term sensing LTS window is successful in decoding control SA information and successful in decoding the control SA information, and meanwhile, the Reference Signal Received Power (RSRP) value of DATA DATA information exceeds a preset threshold, determining that the mapping resource is the excluded resource, and meanwhile, if the aperiodic service is a unicast service or a multicast service, determining that the mapping resource corresponding to the feedback resource of the DATA information is the excluded resource;

determining that the occupied time-frequency resources are the excluded resources in the preset resource reselection window in the time-frequency resources limited by the starting time and the ending time of the preset resource reselection window;

if the service packet to be sent is a periodic service, selecting resources in the preset resource reselection window, and determining that the mapping resources are excluded resources if a resource conflict exists between the mapping resources mapped to the multiple reserved resources of the preset resource reselection window according to the service period of the service packet, and meanwhile, determining that the mapping resources corresponding to the feedback resources of the service packet are the excluded resources if the periodic service is a unicast service or a multicast service;

and if the service packet to be sent is an aperiodic service, determining that the service packet is excluded when the resources of initial transmission and retransmission of the service packet conflict with the time-frequency resources in the preset resource reselection window.

9. The method of claim 6, wherein the determining the candidate resource set capable of being used for initial transmission or retransmission of the service packet within the preset resource reselection window according to the excluded resources comprises:

determining whether the ratio of the remaining resources except the excluded resources in the preset resource reselection window to the total time-frequency resources of the preset resource reselection window is greater than a first preset value;

if the ratio is greater than or equal to the first preset value, determining the remaining resources except the excluded resources in a preset resource reselection window as the candidate resource set;

and if the ratio is smaller than the first preset value, increasing the Reference Signal Received Power (RSRP) threshold value in the resource selection process by a second preset value, and re-determining the excluded resources.

10. The method of claim 6, wherein the determining the candidate resource set capable of being used for initial transmission or retransmission of the service packet within the preset resource reselection window according to the excluded resources comprises:

if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is greater than or equal to a third preset value, and the ratio of the remaining resources, except the excluded resources, in the preset resource reselection window to the total time-frequency resources of the preset resource reselection window is greater than or equal to a first preset value, determining that the remaining resources, except the excluded resources, in the preset resource reselection window are the candidate resource set;

if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is greater than or equal to a third preset value, and the ratio of the remaining resources except the excluded resources in the preset resource reselection window to the total time-frequency resources of the preset resource reselection window is smaller than the first preset value, increasing the Reference Signal Received Power (RSRP) threshold value in the resource selection process by a second preset value, and re-determining the excluded resources;

and if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is smaller than the third preset value, determining that the remaining resources in the preset resource reselection window except the excluded resources are the candidate resource set.

11. The method of claim 6, wherein the selecting the target resource for initial transmission or retransmission of the service packet in the candidate resource set comprises:

and randomly selecting the resource directly in the candidate resource set as the target resource.

12. The method of claim 6, wherein the selecting the target resource for initial transmission or retransmission of the service packet in the candidate resource set comprises:

if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is greater than or equal to a third preset value, skipping the processes of RSSI measurement and smoothing, and randomly selecting a resource as the target resource in the candidate resource set according to a preset time interval limit value of initial transmission and retransmission of the service packet;

if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is smaller than the third preset value, and the resources in the candidate resource set are greater than or equal to the initial transmission or retransmission resources of the service packet at this time, randomly selecting the resources in the candidate resource set as the target resources;

and if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is smaller than the third preset value, and the resources in the candidate resource set are smaller than the initial transmission or retransmission resources of the service packet at this time, giving up the current transmission of the service packet.

13. The method of resource reselection according to claim 11 or 12, wherein the method further comprises:

judging whether the time interval of the initial transmission resource and the time interval of the retransmission resource of the service packet meet a preset time interval limit value or not according to the target resource;

and if the preset time interval limit value is not met, reselecting the target resource in the candidate resource set.

14. The method of resource reselection according to claim 1, wherein said method further comprises:

if the resource reselection times of the service packet exceeds a preset count value in the preset resource reselection window, discarding the service packet, or randomly selecting the target resource in the preset resource reselection window.

15. A resource reselection method is applied to a second node device, and is characterized in that the method comprises the following steps:

receiving initial transmission data of a service packet sent by first node equipment; when the first node sends the service packet, if a preset sensing window after a target moment monitors that resource conflict exists in initial transmission or retransmission of the service packet, resource reselection is triggered, and a target resource in a preset resource reselection window is selected as a transmission resource for initial transmission or retransmission of the service packet;

if the initial transmission data of the service packet is successfully received, the retransmission data of the service packet is abandoned;

if the initial transmission data of the service packet is not successfully received, trying to receive retransmission data of the service packet within the duration of a preset time interval limit value after the initial transmission data is received;

the preset time interval limit value is a time interval which needs to be met between initial transmission and retransmission and is configured by a system or preconfigured;

the starting time of the preset sensing window is as follows: increasing the time of a first preset delay time duration from the target time;

the end time of the preset sensing window is as follows: retransmission sending time of the last retransmission selected by the service packet resource at the target moment; or,

the end time of the preset sensing window is as follows: and the time of a third preset delay time length is before the retransmission sending time of the last retransmission selected by the service packet resource at the target moment.

16. The method for resource reselection according to claim 15, wherein after receiving the retransmission data of the service packet within a duration of a preset time interval limit value after receiving the initial transmission data, the method further comprises:

and combining the received initial transmission data and retransmission data corresponding to the service packet according to the initial transmission or retransmission time-frequency resource information indicated in the retransmission data.

17. A node device, the node device being a first node device, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; wherein the processor executes the program to perform the steps of:

if the service packet sent by the upper layer is received at the target moment, monitoring whether resource conflict exists in initial transmission or retransmission of the service packet or not at a preset sensing window after the target moment;

if the initial transmission or retransmission of the service packet has resource conflict, triggering resource reselection, and selecting a target resource in a preset resource reselection window as a transmission resource for the initial transmission or retransmission of the service packet;

performing initial transmission or retransmission of the service packet through the transmission resource;

wherein, the starting time of the preset sensing window is as follows: increasing the time of a first preset delay time duration from the target time;

the end time of the preset sensing window is as follows: retransmission sending time of the last retransmission selected by the service packet resource at the target moment; or,

the end time of the preset sensing window is as follows: and the time of a third preset delay time length is before the retransmission sending time of the last retransmission selected by the service packet resource at the target moment.

18. The node device of claim 17, wherein a starting time of the preset resource reselection window is: increasing the time of a first preset delay time duration from the moment of triggering the resource reselection;

the end time of the preset resource reselection window is as follows: increasing the time of a second preset delay time duration from the target time;

and the second preset delay time is longer than the first preset delay time.

19. The node device of claim 17, wherein the processor is further configured to:

and if the service packet is retransmitted in the preset sensing window, updating the end time of the preset sensing window according to the retransmission sending time of the last retransmission.

20. The node device of claim 18, wherein the processor is further configured to:

and if the retransmission of the service packet is carried out in the preset sensing window, updating the starting time of the preset resource reselection window according to the triggering resource reselection time of the last retransmission.

21. The node device of claim 17, wherein the processor monitors whether there is a resource conflict in the initial transmission or the retransmission of the traffic packet, comprising:

decoding the control information SCI of the direct link, judging whether the initial retransmission of the periodic/aperiodic service conflicts with the initial transmission or retransmission of the service packet according to the DATA DATA time-frequency resource information of the initial transmission or retransmission of the periodic/aperiodic service indicated in the SCI, and obtaining a first monitoring result;

judging whether the feedback information fed back by the hybrid automatic repeat request HARQ has resource conflict with the initial transmission or retransmission resources in the resource selection window corresponding to the service packet at the target moment, and obtaining a second monitoring result;

decoding a preamble of the random access, judging whether the preamble of the periodic/non-periodic service has resource conflict with the initial transmission or retransmission resource in the resource selection window corresponding to the service packet at the target moment, and obtaining a third monitoring result;

and if at least one of the first monitoring result, the second monitoring result and the third monitoring result is that resource conflict exists, determining that resource conflict exists in initial transmission or retransmission of the service packet.

22. The node device of claim 17, wherein the processor selects a target resource in a preset resource reselection window as a transmission resource for initial transmission or retransmission of the service packet, and comprises:

determining excluded resources needing to be excluded in the preset resource reselection window;

determining a candidate resource set which can be used for initial transmission or retransmission of the service packet in the preset resource reselection window according to the excluded resources;

and selecting the target resource for initial transmission or retransmission of the service packet in the candidate resource set.

23. The node device of claim 22, wherein the processor determines excluded resources to be excluded from the preset resource reselection window, comprising:

determining occupied resources as excluded resources in time-frequency resources limited by the starting time and the ending time of the preset resource reselection window according to a resource selection window corresponding to the service packet at a target moment;

if the retransmission of the service packet has resource conflict, determining that the corresponding resource of the subframe sent in the preset sensing window is the excluded resource in the time-frequency resources limited by the starting time and the ending time of the preset resource reselection window;

mapping the random access preamble in the preset sensing window, determining the time-frequency resources defined by the starting time and the ending time of the preset resource reselection window according to the time-frequency position relationship between the random access preamble and the control SA information and the DATA DATA information, wherein the resources occupied by the SA information and the DATA information are the excluded resources, and determining the resources occupied by the feedback information of the DATA information in the time-frequency resources defined by the starting time and the ending time of the preset resource reselection window as the excluded resources if the transmission of the service packet is a unicast service or a multicast service;

determining, as the excluded resource, a resource that needs to be mapped in the preset resource reselection window or mapped in a multi-reserved resource of the preset resource reselection window, among the time-frequency resources defined by the start time and the end time of the preset resource reselection window, the resource sensed in the preset sensing window.

24. The node device of claim 23, wherein the processor, in determining time-frequency resources defined by a start time and an end time of the preset resource reselection window, determines, as the excluded resource, a resource that is perceived in the preset perception window and needs to be mapped in the preset resource reselection window or a resource that needs to be mapped in multiple reservations of the preset resource reselection window, and includes:

the periodic service in the preset sensing window is mapped to the preset resource reselection window or mapped to a mapping resource in multiple reserved resources of the preset resource reselection window according to a period indicated in control SA information, and if the control SA information is decoded successfully and the Reference Signal Received Power (RSRP) value of DATA DATA information exceeds a preset threshold, the mapping resource is determined to be the excluded resource;

if the aperiodic service in the preset sensing window is located in the preset resource reselection window, and if the resource retransmitted by the service packet is located in the preset resource reselection window, at least one of initial transmission and retransmission of the aperiodic service in the long-term sensing LTS window is successful in decoding control SA information and successful in decoding the control SA information, and meanwhile, the Reference Signal Received Power (RSRP) value of DATA DATA information exceeds a preset threshold, determining that the mapping resource is the excluded resource, and meanwhile, if the aperiodic service is a unicast service or a multicast service, determining that the mapping resource corresponding to the feedback resource of the DATA information is the excluded resource;

determining that the occupied time-frequency resources are the excluded resources in the preset resource reselection window in the time-frequency resources limited by the starting time and the ending time of the preset resource reselection window;

if the service packet to be sent is a periodic service, selecting resources in the preset resource reselection window, and determining that the mapping resources are excluded resources if a resource conflict exists between the mapping resources mapped to the multiple reserved resources of the preset resource reselection window according to the service period of the service packet, and meanwhile, determining that the mapping resources corresponding to the feedback resources of the service packet are the excluded resources if the periodic service is a unicast service or a multicast service;

and if the service packet to be sent is an aperiodic service, determining that the service packet is excluded when the resources of initial transmission and retransmission of the service packet conflict with the time-frequency resources in the preset resource reselection window.

25. The node device of claim 22, wherein the processor determines, according to the excluded resource, a candidate resource set that can be used for initial transmission or retransmission of the service packet within the preset resource reselection window, including:

determining whether the ratio of the remaining resources except the excluded resources in the preset resource reselection window to the total time-frequency resources of the preset resource reselection window is greater than a first preset value;

if the ratio is greater than or equal to the first preset value, determining the remaining resources except the excluded resources in a preset resource reselection window as the candidate resource set;

and if the ratio is smaller than the first preset value, increasing the Reference Signal Received Power (RSRP) threshold value in the resource selection process by a second preset value, and re-determining the excluded resources.

26. The node device of claim 22, wherein the processor determines, according to the excluded resource, a candidate resource set that can be used for initial transmission or retransmission of the service packet within the preset resource reselection window, including:

if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is greater than or equal to a third preset value, and the ratio of the remaining resources, except the excluded resources, in the preset resource reselection window to the total time-frequency resources of the preset resource reselection window is greater than or equal to a first preset value, determining that the remaining resources, except the excluded resources, in the preset resource reselection window are the candidate resource set;

if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is greater than or equal to a third preset value, and the ratio of the remaining resources except the excluded resources in the preset resource reselection window to the total time-frequency resources of the preset resource reselection window is smaller than the first preset value, increasing the Reference Signal Received Power (RSRP) threshold value in the resource selection process by a second preset value, and re-determining the excluded resources;

and if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is smaller than the third preset value, determining that the remaining resources in the preset resource reselection window except the excluded resources are the candidate resource set.

27. The node device of claim 22, wherein the processor selects the target resource for initial transmission or retransmission of the traffic packet from the set of candidate resources, comprising:

and randomly selecting the resource directly in the candidate resource set as the target resource.

28. The node device of claim 22, wherein the processor selects the target resource for initial transmission or retransmission of the traffic packet from the set of candidate resources, comprising:

if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is greater than or equal to a third preset value, skipping the processes of RSSI measurement and smoothing, and randomly selecting a resource as the target resource in the candidate resource set according to a preset time interval limit value of initial transmission and retransmission of the service packet;

if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is smaller than the third preset value, and the resources in the candidate resource set are greater than or equal to the initial transmission or retransmission resources of the service packet at this time, randomly selecting the resources in the candidate resource set as the target resources;

and if the ratio of the time length of the preset resource reselection window to the time length of the resource selection window corresponding to the service packet at the target moment is smaller than the third preset value, and the resources in the candidate resource set are smaller than the initial transmission or retransmission resources of the service packet at this time, giving up the current transmission of the service packet.

29. The node apparatus of claim 27 or 28, wherein the processor executing the program is further configured to:

judging whether the time interval of the initial transmission resource and the time interval of the retransmission resource of the service packet meet a preset time interval limit value or not according to the target resource;

and if the preset time interval limit value is not met, reselecting the target resource in the candidate resource set.

30. The node device of claim 17, wherein execution of the program by the processor is further configured to:

if the resource reselection times of the service packet exceeds a preset count value in the preset resource reselection window, discarding the service packet, or randomly selecting the target resource in the preset resource reselection window.

31. A node device, the node device being a second node device, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; wherein the processor executes the program to perform the steps of:

receiving initial transmission data of a service packet sent by first node equipment; when the first node sends the service packet, if a preset sensing window after a target moment monitors that resource conflict exists in initial transmission or retransmission of the service packet, resource reselection is triggered, and a target resource in a preset resource reselection window is selected as a transmission resource for initial transmission or retransmission of the service packet;

if the initial transmission data of the service packet is successfully received, the retransmission data of the service packet is abandoned;

if the initial transmission data of the service packet is not successfully received, trying to receive retransmission data of the service packet within the duration of a preset time interval limit value after the initial transmission data is received;

the preset time interval limit value is a time interval which needs to be met between initial transmission and retransmission and is configured by a system or preconfigured;

the starting time of the preset sensing window is as follows: increasing the time of a first preset delay time duration from the target time;

the end time of the preset sensing window is as follows: retransmission sending time of the last retransmission selected by the service packet resource at the target moment; or,

the end time of the preset sensing window is as follows: and the time of a third preset delay time length is before the retransmission sending time of the last retransmission selected by the service packet resource at the target moment.

32. The node device of claim 31, wherein the processor, after receiving the retransmission data of the service packet within a duration of a preset time interval limit value after receiving the initial transmission data, is further configured to:

and combining the received initial transmission data and retransmission data corresponding to the service packet according to the initial transmission or retransmission time-frequency resource information indicated in the retransmission data.

33. A resource reselection apparatus applied to a first node device, the apparatus comprising:

the monitoring module is used for monitoring whether resource conflict exists in initial transmission or retransmission of the service packet in a preset sensing window after the target time if the service packet sent by an upper layer is received at the target time;

the reselection module is used for triggering resource reselection if resource conflict exists in initial transmission or retransmission of the service packet, and selecting a target resource in a preset resource reselection window as a transmission resource for the initial transmission or retransmission of the service packet;

a sending module, configured to perform initial transmission or retransmission of the service packet through the transmission resource;

wherein, the starting time of the preset sensing window is as follows: increasing the time of a first preset delay time duration from the target time;

the end time of the preset sensing window is as follows: retransmission sending time of the last retransmission selected by the service packet resource at the target moment; or,

the end time of the preset sensing window is as follows: and the time of a third preset delay time length is before the retransmission sending time of the last retransmission selected by the service packet resource at the target moment.

34. A resource reselection apparatus applied to a second node device, the apparatus comprising:

the receiving module is used for receiving initial transmission data of a service packet sent by the first node equipment; when the first node sends the service packet, if a preset sensing window after a target moment monitors that resource conflict exists in initial transmission or retransmission of the service packet, resource reselection is triggered, and a target resource in a preset resource reselection window is selected as a transmission resource for initial transmission or retransmission of the service packet;

the first processing module is used for giving up the retransmission data reception of the service packet if the initial transmission data reception of the service packet is successful;

the second processing module is used for trying to receive the retransmission data of the service packet within the duration of a preset time interval limit value after the initial transmission data is received if the initial transmission data of the service packet is not successfully received;

the preset time interval limit value is a time interval which needs to be met between initial transmission and retransmission and is configured by a system or preconfigured;

the starting time of the preset sensing window is as follows: increasing the time of a first preset delay time duration from the target time;

the end time of the preset sensing window is as follows: retransmission sending time of the last retransmission selected by the service packet resource at the target moment; or,

the end time of the preset sensing window is as follows: and the time of a third preset delay time length is before the retransmission sending time of the last retransmission selected by the service packet resource at the target moment.

35. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of a resource reselection method as claimed in any one of claims 1 to 14 or carries out the steps of a resource reselection method as claimed in claim 15 or 16.

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