CN109714824B

CN109714824B - Semi-persistent scheduling resource allocation method and base station

Info

Publication number: CN109714824B
Application number: CN201711014308.1A
Authority: CN
Inventors: 周欣; 姜春霞; 吕征南
Original assignee: Potevio Information Technology Co Ltd
Current assignee: Potevio Information Technology Co Ltd
Priority date: 2017-10-26
Filing date: 2017-10-26
Publication date: 2023-08-11
Anticipated expiration: 2037-10-26
Also published as: CN109714824A

Abstract

The embodiment of the invention provides a semi-persistent scheduling resource allocation method and a base station. Wherein the method comprises the following steps: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, authorizing the UE to release the SL SPS resource; if judging that SL SPS service meeting the reassignment condition exists and the SL SPS service has the remaining control resources and service resources, reassigning SL SPS resources to the corresponding UE; if the SL SPS new access service is judged to exist and the SL SPS new access service has the residual control resources and service resources, SPS resources are allocated for the corresponding UE. The semi-persistent scheduling resource allocation method and the base station provided by the embodiment of the invention provide the classification and priority processing process of SL SPS service, and can more effectively utilize and allocate resources on the premise of guaranteeing QoS of users, thereby improving the utilization rate of the resources and the system capacity.

Description

Semi-persistent scheduling resource allocation method and base station

Technical Field

The embodiment of the invention relates to the field of wireless communication, in particular to a semi-persistent scheduling resource allocation method and a base station.

Background

V2X (Vehicle to X), namely information exchange between the vehicle and the outside, is a key technology of an intelligent transportation system in the future. V2X was approved in The 3GPP (The 3rd Generation Partnership Project, third generation partnership project) RAN #68 conference, mainly studying vehicle data transmission schemes based on 3GPP communication protocols. V2X communications include V2V communications (car-to-car communications), V2I communications (car-to-road side infrastructure communications), and V2P communications (car-to-pedestrian communications). V2X applications will improve driving safety, reduce congestion and vehicle energy consumption, improve traffic efficiency and vehicle entertainment experience.

One of the basic message types of V2V is a CAM message. The CAM (Cooperative Awareness Messages, cooperative sensing message) message is used for providing the basic state information of the vehicle such as the position, the speed, the acceleration, the direction and the like of the ITS terminal to the neighbor ITS (Intelligent Transport System, intelligent transportation system) terminals in the single-hop communication range, and is suitable for the scenes such as front vehicle alarming, motorcycle approaching indication and the like. After all VDC (Vehicle Dynamics Control ) nodes are started, CAM messages are sent out substantially at regular intervals. Most of the V2V services have a periodically broadcast feature. Meanwhile, for the periodical V2V service, the size and the arrival interval of the data packet are regular and can be circulated, so that the method is more suitable for a semi-persistent scheduling resource allocation mode.

The 3GPP protocol defines a sip SPS (sip Semi-Persistent Scheduling, SL SPS, sidelink Semi-persistent scheduling) mechanism, and reports traffic model related information, such as a traffic cycle, a time offset, SL priority information, and a message size of a maximum TB (Transport Block) in an observed traffic model, through auxiliary information of a UE. The Sidelink SPS mechanism supports multiple SL SPS configuration periods, each of which is configured by SPS-ConfigSL cells, including the index SL SPS index and SL SPS period of the SL SPS configuration. SL SPS mechanism unlike LTE R9SPS mechanism, it supports multiple SL SPS periods, and the SL SPS resources are a block of time-frequency domain resources allocated from a resource pool.

The current scheme based on SL SPS resource allocation is mainly based on SPS mechanism and VoIP (Voice over Internet Protocol ) traffic considerations and designs in the 3gpp LTE R9 protocol. However, the sip SPS mechanism is not the same as that in LTE Rel9, and the service characteristics of V2V service and VoIP service are also different. How to realize the resource allocation of the V2X service based on the Sidelink SPS mechanism becomes a problem to be solved.

Disclosure of Invention

In order to solve the resource scheduling requirement of the V2X service in the prior art, the embodiment of the invention provides a semi-persistent scheduling resource allocation method and a base station.

In a first aspect, an embodiment of the present invention provides a method for allocating resources in semi-persistent scheduling, where the method includes a release SL SPS resource flow, a reallocation SL SPS resource flow, and an allocation SL SPS resource flow; the SL SPS resource release process is executed first, and specifically comprises the following steps: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, authorizing the UE to release the SL SPS resource; and executing the SL SPS resource reallocation process, which specifically comprises the following steps: if judging that the SL SPS service meeting the reassignment condition exists and has the remained control resources and service resources, reassigning SL SPS resources to the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time; and finally, executing the SL SPS resource allocation process, which specifically comprises the following steps: if the new access service of the SL SPS is judged to exist and the residual control resource and service resource exist, the SPS resource is allocated to the corresponding UE according to the SL SPS period, the SL SPS data quantity and the SL SPS configuration time.

In a second aspect, an embodiment of the present invention provides a base station. The base station comprises a SL SPS resource release unit, a SL SPS resource reallocation unit and an SPS resource allocation unit. The SL SPS resource release unit is specifically configured to: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, authorizing the UE to release the SL SPS resource; the SL SPS resource reallocation unit is specifically configured to: if judging that the SL SPS service meeting the reassignment condition exists and has the remained control resources and service resources, reassigning SL SPS resources to the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time; the SL SPS resource allocation unit is specifically configured to: if the new access service of the SL SPS is judged to exist and the residual control resource and service resource exist, the SPS resource is allocated to the corresponding UE according to the SL SPS period, the SL SPS data quantity and the SL SPS configuration time.

In a third aspect, an embodiment of the present invention provides a computer apparatus. The device comprises a memory and a processor, wherein the processor and the memory complete communication with each other through a bus; the memory stores program instructions executable by the processor, the processor invoking the program instructions capable of performing the method of: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, authorizing the UE to release the SL SPS resource; if judging that the SL SPS service meeting the reassignment condition exists and has the remained control resources and service resources, reassigning SL SPS resources to the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time; if the new access service of the SL SPS is judged to exist and the residual control resource and service resource exist, the SPS resource is allocated to the corresponding UE according to the SL SPS period, the SL SPS data quantity and the SL SPS configuration time.

In a fourth aspect, embodiments of the present invention provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, is capable of performing the method of: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, authorizing the UE to release the SL SPS resource; if judging that the SL SPS service meeting the reassignment condition exists and has the remained control resources and service resources, reassigning SL SPS resources to the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time; if the new access service of the SL SPS is judged to exist and the residual control resource and service resource exist, the SPS resource is allocated to the corresponding UE according to the SL SPS period, the SL SPS data quantity and the SL SPS configuration time.

The semi-persistent scheduling resource allocation method and the base station provided by the embodiment of the invention provide the classification and priority processing process of SL SPS service, and can more effectively utilize and allocate resources on the premise of guaranteeing QoS of users, thereby improving the utilization rate of the resources and the system capacity.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flowchart of a method for allocating semi-persistent scheduling resources according to an embodiment of the present invention;

fig. 2 is a sub-flowchart of semi-persistent scheduling resource allocation according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The maximum difference between the Sidelink SPS mechanism and the LTE R9SPS mechanism is that a multi-period SPS mechanism is introduced, and meanwhile, the reporting of UE auxiliary information is increased, so that the base station eNB can better perform SL SPS configuration and activation and release of SL SPS resources. The embodiment of the invention provides a semi-persistent scheduling resource allocation method based on a Sidelink SPS (SL SPS) mechanism, which comprises a SL SPS resource release flow, a SL SPS resource reallocation flow and a SL SPS resource allocation flow.

The SL SPS resource release process is executed first, and specifically comprises the following steps: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, the UE is authorized to release the SL SPS resource.

The TTI is updated, i.e. the current system frame number and subframe number are updated. Wherein, the subframe number is circulated from 0 to 9, and the system frame number is circulated from 0 to 1023. The base station eNB first determines whether the current subframe is a downlink subframe or a special subframe. Because, the eNB can transmit downlink control information and data to the UE only if the subframe is a downlink subframe or a special subframe. The specific method is to determine whether the subframe is a downlink subframe or a special subframe according to the subframe number, for example, when the uplink/downlink configuration (UL/DL configuration) is 1, the subframe number is 0,4,5,9, the subframe number is 1, and the subframe number is 6. If the eNB judges that the current subframe is a downlink subframe or a special subframe, whether a SL SPS service release request sent by the UE is received or whether the SL SPS resource release request exists is further judged. And the UE actively informs the eNB when the SL SPS resource needs to be released, applies to release the SL SPS resource, and receives a SL SPS service release request sent by the UE. If the eNB actively determines that the SL SPS resources need to be released, for example, more important service is added, but the system resources are insufficient at present, the resources occupied by the relatively secondary service must be released first, which indicates that the SL SPS resources need to be released.

If the eNB receives a SL SPS service release request sent by a UE or judges that the SL SPS resource release request exists, the SL SPS resource release service is considered to be processed, whether the SL SPS resource release service needs to be processed is further judged, namely PDCCH (Physical Downlink Control Channel ) resources exist or not, if the residual control resources exist, the corresponding PDCCH resource positions corresponding to PDCCH search spaces of different UEs are possibly different, so that corresponding PDCCH resources are needed to be calculated and searched for the UE to which the service belongs, if the corresponding PDCCH resources exist, SL SPS resource release is carried out for the UE, the SL SPS resource is released through the PDCCH bearing downlink grant indication UE, and if the corresponding PDCCH resources do not exist, the next service in the service is processed; if there are no control resources remaining, execution is ended.

And if the SL SPS resource release service does not need to be processed or the SL SPS resource release service is completely traversed in the current TTI, executing a reassignment SL SPS resource flow.

And executing the SL SPS resource reallocation process, which specifically comprises the following steps: if judging that the SL SPS service meeting the reassignment condition exists and has the remained control resources and service resources, reassigning SL SPS resources to the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time; the eNB first determines whether there is SL SPS traffic satisfying the reallocation conditions. The eNB obtains service model related information, such as a service period, a time offset, SL priority information, and a message size of a maximum TB (transport block) in the service model, by using auxiliary information reported by the UE, and obtains configuration parameters required for semi-persistent scheduling resource allocation in combination with BSR (Buffer Size Report, buffer status report) reported by the UE and historical statistics information, including an SL SPS period, an SL SPS data amount, and an SL SPS configuration time. The arrival time of the data packet can be determined according to the service period and the offset, and the corresponding SL SPS configuration time can be determined according to the arrival time of the data packet. In the SL SPS traffic, situations may arise such as a change in SL SPS period, SL SPS data amount, and SL SPS configuration time, which may trigger SL SPS resource reallocation.

If the eNB judges that the SL SPS service meeting the reallocation condition exists according to the preset reallocation condition, the eNB considers that the SL SPS resource reallocation service needs to be processed, and further judges whether the residual control resource and service resource exist, namely whether the residual PDCCH (Physical Downlink Control Channel ) and PSCCH (Physical Sidelink Control Channel, physical sidelink control channel) and PSSCH (Physical Sidelink Shared Channel ) resources exist, and if one of the resources is exhausted, the residual resources are considered to exist.

If the eNB judges that the residual control resources and service resources exist, the PDCCH resource positions corresponding to PDCCH search spaces of different UE are possibly different, so that corresponding PDCCH resources are needed to be calculated and searched for the UE to which the service belongs, if the corresponding PDCCH resources do not exist, the next service in the service is processed, and if the corresponding PDCCH resources exist, SL SPS resources are reallocated for the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time; and if the eNB judges that the control resources and the service resources are not remained, ending the execution.

And if the SL SPS resource reallocation service does not need to be processed or the SL SPS resource reallocation service is completely traversed, executing the SL SPS resource allocation flow.

And finally, executing the SL SPS resource allocation process, which specifically comprises the following steps: if the new access service of the SL SPS is judged to exist and the residual control resource and service resource exist, the SPS resource is allocated to the corresponding UE according to the SL SPS period, the SL SPS data quantity and the SL SPS configuration time.

The eNB first determines whether there is a SL SPS new access service. The eNB obtains service model related information such as service period, time offset, SL priority information and message size of the maximum TB in the service model through auxiliary information reported by the UE, and obtains configuration parameters required by semi-persistent scheduling resource allocation by combining BSR reported by the UE and historical statistical information, wherein the configuration parameters comprise SL SPS period, SL SPS data volume and SL SPS configuration time. The arrival time of the data packet can be determined according to the service period and the offset, and the corresponding SL SPS configuration time can be determined according to the arrival time of the data packet. If the SL SPS new access service is judged to exist, whether the residual control resource and service resource exist or not is further judged, namely, whether the residual PDCCH and the corresponding PSCCH and PSSCH resources exist or not is judged, and if one of the resources is exhausted, the fact that the residual resources do not exist is considered.

If the eNB judges that there are remaining control resources and service resources, because the PDCCH resource positions corresponding to PDCCH search spaces of different UEs may be different, corresponding PDCCH resources need to be calculated and searched for the UE to which the service belongs, if there is no corresponding PDCCH resource, the next service in the service is processed, and if there is a corresponding PDCCH resource, SL SPS resources are configured for the corresponding UE according to the SL SPS period, the SL SPS data amount and the SL SPS configuration time, specifically: and activating scheduling resources at the SL SPS configuration time, wherein the scheduling resources comprise time domain resources and frequency domain resources, and the SL SPS configuration time is taken as a starting point, and the SL SPS resources are allocated to the frequency domain resources of the SL SPS data volume of the UE in each SL SPS period, and are authorized once and used for multiple times.

And if the eNB judges that the control resources and the service resources are not remained, ending the execution.

If no SL SPS resource allocation traffic needs to be processed or the SL SPS resource allocation traffic is fully traversed, execution is terminated.

The priorities of the three processes in the embodiment of the invention refer to the sequence of process processing, and are not executable only when the priority is high but also when the priority is low.

The embodiment of the invention provides the classification and priority processing process of SL SPS service, and designs the priority sorting by combining the factors of service characteristics, time delay requirements, reasonable use of control resources and service resources and the like. For example, the SL SPS resource release process may first reclaim PSCCH and PSSCH resources corresponding to the SL SPS prior to reallocation of the SL SPS resources and allocation of the SL SPS resources, and then use the resources for subsequent resource allocation and reallocation of the SL SPS traffic. This release-before-allocation to other users allows more efficient use of resources.

The semi-persistent scheduling resource allocation method provided by the embodiment of the invention provides the classification and priority processing process of SL SPS service, and can more effectively utilize and allocate resources on the premise of guaranteeing QoS of users, thereby improving the utilization rate of resources and the system capacity.

Further, based on the above embodiment, the reallocating SL SPS resource flow or the allocating SL SPS resource flow further includes: the SL SPS resources are configured at two SL SPS processes, the two SL SPS processes having different SL SPS periods.

The eNB acquires service model related information through auxiliary information reported by the UE, judges whether two SL SPS processes are required to be configured for the UE according to BSR and historical statistical information reported by the UE, and if so, more reasonably utilizes resources and reduces resource waste, the two SL SPS processes are configured for the UE. For example, the eNB may learn that the estimated period of the UE is 100ms and the maximum TB block is 300 bytes according to the auxiliary information sent by the UE, and meanwhile learn that the UE periodically sends a data packet according to the statistics result of the eNB, where the data packet size has 300 bytes and 190 bytes, and according to the service model, the data packet sending rule may be determined, that is, the data packet of 300 bytes first, the data packet of 4 bytes later, the data packet of 300 bytes later, and the data packet of 4 bytes later, and then the data packet of 190 bytes later is sent according to the rule. Thus, a double period can be set at this time to reasonably utilize resources. For example, x=300 bytes are divided into (X-y=110 bytes) and Y-byte packets (X-y=110 bytes, y=190 bytes) for transmission in two SL SPS processes, respectively, with a Y packet period t=100 ms and an X-Y packet period of 500ms. I.e., 190 bytes of SL SPS packets are transmitted every 100ms, and an additional 110 bytes (300-190) of SL SPS packets are transmitted every 500ms. And activating the scheduling resource of one SL SPS period at the configuration time, wherein the eNB cannot perform two scheduling grants on the same user in the same subframe, so that the activation of the scheduling resource of the second SL SPS period is performed in the next downlink subframe or the special subframe. So far, the time-frequency domain resource allocation of the dual-period SL SPS resource is completed.

Based on the above embodiments, the embodiments of the present invention maximize the utilization of system resources and reduce the waste of resources by configuring SL SPS resources in two SL SPS processes.

Further, based on the above embodiment, the reallocation SL SPS resource flow further includes: if any parameter of the SL SPS period, the SL SPS data amount, and the SL SPS configuration time is changed and meets a threshold requirement of the SL SPS configuration time, the reallocation condition is met, and SL SPS resources need to be reallocated for the UE; and if the current TTI moment is in the time range of the updated SL SPS configuration moment, reallocating SL SPS resources for the UE.

After the eNB acquires the configuration parameters required for scheduling, the eNB determines the following conditions, and if one of the following conditions is satisfied, it is considered that SL SPS reassignment is required.

1) The SL SPS period changes and meets the threshold requirement: the current data packet arrival period of the UE is not matched with the SL SPS scheduling period;

2) The SL SPS configuration time changes, i.e., the time offset changes, and meets the threshold requirement: the time domain position of the current data packet arrival time of the UE is not matched with the time domain position of the allocated SL SPS resource, so that the time delay requirement is not met;

3) The SL SPS data volume of the data packet changes, the length of the sub-channel to be configured is not matched with the length of the allocated sub-channel, and the threshold requirement is met: the number of physical resource blocks (Physical Resource Block, PRBs) that need to be allocated varies.

If the current TTI moment is in the time range of the updated SL SPS configuration moment, the SL SPS resource is reallocated for the UE; and if the current TTI time is not in the time range of the updated SL SPS configuration time, judging in the next scheduling period.

If the updated SL SPS configuration time is calculated to be T ₀ The allowable time delay is delta, the time range of the updated SL SPS configuration time is (T) ₀ ，T ₀ ⁺ δ)。

On the basis of the embodiment, the embodiment of the invention reallocates SL SPS resources for the UE when the reallocation condition is met by setting the reallocation condition, ensures that SL SPS resource allocation is dynamically adjusted according to the V2X service requirement, and the quick reallocation can meet the V2X function requirement, improves the efficiency and quality of resource utilization and ensures the reasonable use of V2X service transmission delay and system resources; through reasonable setting of configuration time, normal operation of SL SPS resource reallocation is ensured.

Further, based on the above embodiment, the SL SPS resource allocation procedure further includes: and if the current TTI time is in the time range of the SL SPS configuration time of the UE, SL SPS resources are allocated to the UE.

According to the SL SPS period, the SL SPS data amount and the SL SPS configuration time, SL SPS resources are allocated to the corresponding UE, and if the current TTI time is within the time range of the SL SPS configuration time of the UE, SL SPS resources are allocated to the UE; if the current TTI time is not within the time range of the SL SPS configuration time of the UE, judging again at the next scheduling time.

If it is known by calculationSL SPS configuration time is T ₀ The allowable time delay is delta, and the time range of the SLSPS configuration time is (T ₀ ，T ₀ ⁺ δ)。

On the basis of the embodiment, the embodiment of the invention ensures the normal running of SL SPS resource allocation through reasonable setting of the allocation time.

Further, based on the above embodiment, the SL SPS resource release process determines the priority of the SL SPS resource release in a first-in first-out order; the process of reallocating SL SPS resources determines the priority of the reallocated SL SPS resources according to the emergency situation of service processing and the requirements of Qos (Quality of service ); and the SL SPS resource allocation flow determines the priority of the SL SPS resources according to the priority information provided by the UE and the configuration time.

The embodiment of the invention combines the characteristics of the service, the time delay requirement, the reasonable use of control resources and service resources and other factors, and sets the internal processing priority for the SL SPS resource release flow, the SL SPS resource reallocation flow and the SL SPS resource allocation flow. The SL SPS resource release process determines the priority of the SL SPS resource release according to the first-in first-out sequence. For the SL SPS service of the allocated or reallocated resources, the internal priority ordering is carried out according to a certain principle, and the service QoS requirement, particularly the time delay requirement, is met by taking the fact that the SL SPS service with high priority is allocated or reallocated resources under the limited PDCCH resources preferentially.

The process of reallocating SL SPS resources determines the priority of the reallocated SPS resources according to the emergency situation of service processing and Qos requirements; based on the principle, the internal priority ordering is performed according to the service period, the time offset and the change condition of the data packet size, wherein the priority of the shorter service period is higher than that of the longer service period, the priority of the shorter service period which does not meet the time delay requirement is higher than that of the time offset which meets the time delay requirement but can be finely adjusted because of the change of the time offset, and the priority of the larger data packet is higher than that of the smaller data packet. The priority of SL SPS service with a shortened service period, which does not meet the time delay requirement due to the change of time offset and which has a large data packet is the same, and the priority is the first level and the level is higher; the priority level of the service period is prolonged, the time offset change meets the time delay requirement but can be adjusted finely, and the data packet is smaller, and the priority level is the second level and is lower. In addition, finer internal priorities may be divided, such as the following to give an internal prioritization approach for SL SPS reconfiguration: the sequence of the priority from high to low is SL SPS reconfiguration service which does not meet the time delay requirement due to the change of the time offset, SL SPS reconfiguration service with larger data packet, SL SPS reconfiguration service with shorter service period, SL SPS reconfiguration service with longer service period, SL SPS reconfiguration service with smaller data packet, and SL SPS reconfiguration service which meets the time delay requirement but can be finely tuned due to the change of the time offset.

And the SL SPS resource allocation flow determines the priority of the SL SPS resources according to the priority information provided by the UE and the configuration time, the priority with the earlier configuration time is configured, and the priority information provided by the UE at the same configuration time is ordered according to the priority level.

The internal processing priority set in the embodiment of the invention refers to the sequence of processing, and is not executable only when the priority is high but also when the priority is low.

On the basis of the embodiment, the embodiment of the invention sets the internal processing priority for the SL SPS resource release flow, SL SPS resource reallocation flow and SL SPS resource allocation flow, further meets the service requirement and ensures the reasonability of SL SPS resource reallocation.

Further, based on the above embodiment, the reallocating SL SPS resource flow or the allocating SL SPS resource flow further includes:

distributing time-frequency domain resources of primary transmission for SL SPS service;

if judging that secondary transmission is needed, distributing the time-frequency domain resource of retransmission for SL SPS service;

and packaging the PDCCH and outputting the SL SPS scheduling information to a physical layer.

Whether the SL SPS new service is accessed or the SL SPS service is reallocated due to some factors, there may be situations in the transmission where a secondary retransmission is needed. Firstly, the eNB allocates the time-frequency domain resources of primary transmission for the corresponding UE according to the SL SPS period, the SL SPS data volume and the SL SPS configuration time, then the eNB judges whether secondary transmission is needed, namely whether retransmission is needed, and if so, the eNB allocates the time-frequency domain resources of retransmission for the SL SPS service. The retransmission resource and the initial transmission resource are determined by the eNB scheduling and are indicated to the UE through the downlink control information borne by the PDCCH. For example, by DCI 5A (Downlink Control Information a, a type of downlink control information). It should be noted that, the primary transmission resource and the retransmission resource allocated by the eNB to the UE are indicated to the UE by one DCI. The principle of resource allocation is: 1) The same SL SPS scheduling period is used for primary transmission and retransmission, but the SL SPS activation time is different and the time interval cannot exceed K, wherein K is a threshold value set according to the time delay requirement; 2) The resource locations on the frequency domain allocated for the primary and retransmission may be different, but the resource sizes are the same. And finally, packaging the PDCCH, distributing SL SPS service resources, and outputting SL SPS scheduling information to a physical layer.

On the basis of the embodiment, the embodiment of the invention ensures the effective allocation of SL SPS service resources with high reliability requirements and improves the reliability of the system by setting secondary transmission (retransmission) in SL SPS resource allocation.

Further, based on the above embodiment, the time-frequency domain resource of the retransmission is different from the time-frequency domain resource of the initial transmission; the method for judging whether secondary transmission is needed specifically comprises the following steps: judging whether secondary transmission is needed or not according to the reliability requirement of the service and the shortage condition of network side resources.

And the eNB allocates the time-frequency domain resources of the primary transmission to the corresponding UE according to the SLSPS period, the SL SPS data quantity and the SL SPS configuration time, and then the eNB judges whether secondary transmission is needed, namely whether retransmission is needed or not, and particularly comprehensively judges according to service characteristics such as high reliability requirements and network side resource utilization conditions such as shortage of network side resources. And if judging that secondary transmission is needed, distributing the time-frequency domain resources of retransmission for the SL SPS service. When the system considers both the initial and retransmission positions, it is necessary to consider conflicting scenarios. Therefore, the time-frequency domain location of the retransmission cannot be scheduled using the initial transmission, i.e., using the time-frequency domain resources that have not yet been planned. Therefore, the configuration time of the primary transmission packet and the retransmission packet cannot be the same, but the interval cannot be too large, for example, the primary transmission packet and the retransmission packet cannot be more than 15 subframes; meanwhile, the resources allocated to the primary transmission packet and the retransmission packet also have different frequency domain spaces.

Based on the above embodiments, the embodiment of the present invention improves the reliability of the system by reasonably judging whether secondary transmission is required or not and ensuring that the time-frequency domain resource of retransmission is different from the time-frequency domain resource of primary transmission in secondary transmission.

In order to further explain the semi-persistent scheduling resource allocation method provided by the embodiment of the present invention, a specific example is given below with reference to fig. 1 and fig. 2.

Fig. 1 is a flowchart of a semi-persistent scheduling resource allocation method according to an embodiment of the present invention. As shown in fig. 1, the method flow is as follows:

step 1, resource allocation starts.

And step 2, updating the TTI by the eNB. Here, the current subframe number and the system frame number need to be updated. The subframe number is cycled from 0 to 9, and the system frame number is cycled from 0 to 1023.

And 3, the eNB judges whether the current TTI is a downlink subframe or a special subframe. The judging method is to judge whether the frame is a downlink subframe or a special subframe by the subframe number, for example, the UL/DL configuration is 1, the subframe number is 0,4,5,9 is the downlink subframe, and the subframe numbers are 1 and 6 are the special subframes. If yes, executing the step 4, otherwise, returning to the step 2. If the system is an FDD (Frequency Division Duplexing), the step is skipped.

And step 4, the eNB judges whether the service needing SL SPS release exists at the current moment. If yes, executing step 5, otherwise, executing step 8.

It should be noted that, the eNB inserts the SL SPS service release request and the SL SPS service with the SLSPS resource release requirement, which are received from the UE, into the SL SPS release service queue according to a priority principle (in a first-in first-out order here), and then performs resource release on the service in the SL SPS release service queue one by one according to the order of priority from high to low.

And 5, the eNB judges whether the residual PDCCH resources exist. If yes, step 6 is performed, otherwise step 21 is performed.

And 6, eNB authorization, SL SPS service resource release is carried out, namely the eNB sends downlink authorization to instruct the UE to release the sidelink resource of SPS.

Specifically, in this step, the eNB reads the service to be processed in the SL SPS release service queue sequentially, calculates and searches the corresponding PDCCH resource for the UE to which the service belongs, and if there is the corresponding PDCCH resource, encapsulates and sends the downlink grant of the sip link resource for releasing SPS for the UE to which the service belongs. And if the corresponding PDCCH resource does not exist, reading the next service to be processed in the SL SPS release service queue, and performing the operation of the step 6.

And 7, the eNB judges whether all the SL SPS resource release services are processed. If yes, executing the step 8, otherwise, returning to the step 5.

Step 8, the eNB determines whether there is a SL SPS period, a SL SPS data amount, or an offset change in the SL SPS traffic at the current time, that is, whether there is a SL SPS period, a SL SPS data amount, or an offset changed SL SPS traffic. If yes, step 9 is performed, otherwise step 15 is performed.

In SPS traffic, there may be situations such as scheduling period, time offset, SL SPS packet size changes that may trigger the SL SPS traffic to resume resource allocation. In order for the radio resources to meet the SL SPS traffic transmission, the eNB needs to make a decision based on these triggers.

Step 9, for all the SL SPS services for which the above-described trigger occurs, the eNB individually determines whether the reassignment condition is satisfied or not, and whether the SL SPS service reassignment is required or not. If yes, step 10 is performed, otherwise step 15 is performed.

The method is to read SL SPS scheduling information of the SPS service, judge the following conditions according to auxiliary information, BSR information and historical statistical data reported by UE, and consider that SL SPS reconfiguration is needed if one of the following conditions is met.

3) The SL SPS data volume of the data packet changes, the length of the sub-channel to be configured is not matched with the length of the allocated sub-channel, and the threshold requirement is met: the number of physical resource blocks PRB that need to be allocated varies.

In consideration of priority ranking, all the services meeting the SL SPS resource reallocation conditions are inserted into the SL SPS resource reallocation service queue according to the priority, and then the services in the SL SPS resource reallocation service queue are allocated with resources one by one according to the order of priority from high to low.

And step 10, the eNB judges whether the residual control resources and service resources exist. The judging mode is to check whether there is a residual PDCCH and corresponding PSCCH and PSSCH resources, and if one of the resources is exhausted, the residual resources are considered to be absent. If so, step 11 is performed. If not, step 21 is performed.

Step 11, the eNB determines updated configuration parameters required for the reallocation, that is, determines a reallocated SL SPS period, a SL SPS data amount, and a reallocation time, so as to reallocate SL SPS resources to the UE. Since the SL SPS index is already configured in the service creation process, a proper SL SPS period and SL SPS data volume can be directly selected in the SL SPS index configuration during reassignment, and the SL SPS service activation time is determined by the new SL SPS service arrival time, so that all parameters required in the reassignment process are determined. If the dual-period configuration is needed, determining the SL SPS data volume of each SL SPS schedule in the dual-period SPS schedule, selecting a period suitable for each SL SPS schedule in the dual-period SL SPS schedule in a SL SPS index, and determining a suitable service activation time of each SL SPS schedule in the dual-period SL SPS schedule, namely an updated SL SPS configuration time or SL SPS reconfiguration time.

Step 12, the eNB determines whether the current time is SL SPS reconfiguration time. If so, step 13 is performed. If not, step 14 is performed. The arrival time of the data packet can be determined according to the period and the offset, and the corresponding SL SPS reconfiguration time can be determined according to the arrival time of the data packet. If the current TTI moment is in the time range of the updated SL SPS reconfiguration moment, the SL SPS resources are redistributed to the UE; if the current TTI time is not in the time range of the SL SPS configuration time of the UE, judging in the next scheduling period.

Step 13, the eNB executes a sub-flow of semi-persistent scheduling resource allocation, and the description of the sub-flow is specifically shown in fig. 2.

And 14, the eNB judges whether all the SL SPS resource reallocation services are processed. If so, step 15 is performed. If not, returning to the step 10.

And step 15, the eNB judges whether the SL SPS new access service exists. If so, step 16 is performed. If not, step 21 is performed.

In consideration of priority ranking, all SL SPS resource allocation services are inserted into a SL SPS resource allocation service queue according to the priority, and then the services in the SL SPS resource allocation service queue are allocated with resources one by one according to the order of priority from high to low.

And step 16, the eNB judges whether the residual control resources and service resources exist. The judging mode is to check whether there is a residual PDCCH and corresponding PSCCH and PSSCH resources, and if one of the resources is exhausted, the residual resources are considered to be absent. If yes, step 17 is performed, otherwise step 21 is performed.

Step 17, the eNB determines the SL SPS period, the SL SPS data amount, and the activation time (configuration time). After the new service is initiated, the UE reports auxiliary information including the estimated period of the arrival of the data packet; estimated offset from subframe0 (subframe 0) in SFN0 (system 0 frame) and size of maximum transport block TB. After the eNB receives the information, the eNB judges by combining the BSR information of the UE and the historical statistical data of the eNB side, and determines whether the dual-period SL SPS resource or the single-period SL SPS resource is allocated to the UE. If double-periodic, there are two sets of configuration parameters. Since the eNB cannot perform two scheduling grants in the same subframe, the resource allocation of the second SL SPS scheduling is performed in the next downlink subframe or the special subframe. And the eNB integrates the judgment condition and allocates time-frequency domain resources for the SL SPS new service. The time domain comprises SL SPS service activation time and SL SPS service scheduling period; the frequency domain resources are activated at a specified time on the frequency domain, such as Y bytes of frequency domain resources are allocated according to time T, and (X-Y) bytes of frequency domain resources are allocated according to time 5T. And the time-frequency domain resource allocation is carried with authorization information through DCI 5A and is sent to the UE.

Step 18, the eNB determines whether the current time and the SL SPS new service activation time (configuration time) are consistent, i.e. whether the current time meets the SL SPS new service configuration time, i.e. whether the current TTI is within the time range of the SL SPS new service activation time. If so, step 19 is performed. If not, step 20 is performed. This is because after the activation time is issued, if the current TTI time is within the time range of the SL SPS activation time of the UE, the SL SPS service may be activated, if the activation time within the TTI has been missed, activation cannot be performed, and a decision is made to wait until the next SL SPS period.

Step 19, the eNB executes a semi-persistent scheduling resource allocation sub-process, and a description of the sub-process is specifically shown in fig. 2.

And 20, the eNB judges whether all the SL SPS resource allocation services are processed. If yes, executing step 21; if not, returning to the 16 th step.

And step 21, the SL SPS resource allocation in the current TTI period is ended.

As can be seen from the above steps, the embodiment of the present invention designs the classification and service priority of SL SPS service. In the priorities, SL SPS service is released as a first priority, and released service is processed first; the SL SPS service is reassigned to a second priority, and service reassignment is processed under the condition that no service is released; and finally processing SL SPS new access service. The processing mode can improve the resource utilization rate, and the fast redistribution can meet the capability requirement of V2X.

Reassignment is introduced throughout the process because some information is needed to be changeable in time, such as vehicles and other targets are often in the process of moving, considering V2X traffic. Thus, the period, packet size, and time offset need to be quickly adjusted. Some information to be reported can be notified to a network side in a mode of UE auxiliary information, such as time offset, and some information is configured by SPS-configSL, such as period, priority, carrier frequency point and the like, and the information can be adjusted by indicating the network side to redistribute SL SPS service, so that new service requirements can be rapidly met.

Fig. 2 is a sub-flowchart of semi-persistent scheduling resource allocation according to an embodiment of the present invention. As shown in fig. 2, the eNB performs the semi-persistent scheduling resource allocation sub-flow as follows:

step 101, the flow starts.

Step 102, allocating the time-frequency domain resources of the primary transmission for the SL SPS service.

In this step, the auxiliary information reported by the UE: the method comprises the estimated period of data packet arrival; estimated offset from subframe0 (subframe 0) in SFN0 (system 0 frame) and size of maximum transport block TB; an accurate time offset (offset) can be calculated by the estimated offset. After the eNB receives the information, the eNB judges by combining the BSR information of the UE and the historical statistical data of the eNB end, and determines whether the dual-period SL SPS resource or the single-period SL SPS resource is allocated to the UE. The appropriate SL SPS period and SL SPS data amount are then configured using the SL SPS index configuration. Taking a dual-period SL SPS configuration as an example, for example, the data amount x=300 bytes to be transmitted is divided into (X-Y) byte packets and Y byte packets (X-y=110 bytes, y=190 bytes) to be transmitted in two SL SPS processes, respectively, with a Y packet period t=100 ms and a (X-Y) packet period of 500ms. I.e. 190 bytes of SL SPS packets are transmitted every 100ms, an additional 110 bytes (300-190) of SL SPS packets are transmitted every 500ms, i.e. a total of 300 bytes of packets are transmitted every 500ms. The SL SPS index is determined according to the period T and the corresponding SPS data amount, and allocated as PSCCH resources indicated by the transmission sidelink control information (Sidelink Control Information, SCI) and PSSCH resources satisfying the SPS data amount, and the resource allocation information is encapsulated to the DCI 5A and indicated to the physical layer.

Step 103, judging whether SPS service is transmitted secondarily or not. If so, step 104 is performed. If not, step 105 is performed.

And 104, distributing the retransmitted time-frequency domain resources for the SL SPS service.

The retransmission resource allocation is the same as the initial transmission resource allocation except that the time domain position of the retransmission resource is different from the time domain position of the initial transmission, and the time domain resource allocation of the retransmission should be in (T ₁ ,T ₁ +K) time-of-day, where T ₁ The time corresponding to the time domain resource allocated by the primary transmission is the time delay requirement between the primary transmission and the retransmission.

And 105, packaging the PDCCH, distributing SL SPS service resources, and outputting SL SPS scheduling information to a physical layer.

And step 106, ending.

The semi-persistent scheduling resource allocation method provided by the embodiment of the invention provides the classification and priority processing process of SL SPS service, and can more effectively utilize and allocate resources on the premise of guaranteeing QoS of users, thereby improving the utilization rate of the resources and the system capacity.

Fig. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention. The base station comprises a SL SPS resource release unit 11, a SL SPS resource reallocation unit 12 and a SL SPS resource allocation unit 13, wherein the SL SPS resource release unit 11, the SL SPS resource reallocation unit 12 and the SL SPS resource allocation unit 13 sequentially process:

The SL SPS resource release unit 11 is specifically configured to: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, authorizing the UE to release the SL SPS resource;

when a new TTI period arrives, the base station eNB first determines whether or not a subframe to be communicated with a certain UE is a downlink subframe or a special subframe. If the current subframe is judged to be a downlink subframe or a special subframe, the SLSPS resource release unit 11 judges whether a SL SPS service release request sent by the UE is received or whether the SL SPS resource release request is met. And the UE actively informs the eNB when the SL SPS resource needs to be released, applies to release the SL SPS resource, and receives a SL SPS service release request sent by the UE. If the eNB actively determines that the SL SPS resources need to be released, for example, more important service is added, but the system resources are insufficient at present, the resources occupied by the relatively secondary service must be released first, which indicates that the SL SPS resources need to be released. If the eNB receives the SL SPS service release request sent by the UE or judges that the SL SPS resource release request exists, whether the UE has the remained control resources, namely PDCCH resources, if the UE has the remained control resources, the eNB performs downward authorization, and the authorization instructs the UE to release the SL SPS resources of a PC5 port (a port for scheduling).

The SL SPS resource reallocation unit 12 is specifically configured to: if judging that the SL SPS service meeting the reassignment condition exists and has the remained control resources and service resources, reassigning SL SPS resources to the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time;

SL SPS resource reallocation unit 12 first determines whether there is SL SPS traffic that satisfies the reallocation conditions. The SL SPS resource reallocation unit 12 obtains service model related information, such as a service period, a time offset, SL priority information, and a message size of a maximum TB in the service model, by using auxiliary information reported by the UE, and obtains configuration parameters required for semi-persistent scheduling resource allocation in combination with BSR reported by the UE and historical statistics information, including a SL SPS period, a SL SPS data amount, and a SL SPS configuration time. The arrival time of the data packet can be determined according to the service period and the offset, and the corresponding SL SPS configuration time can be determined according to the arrival time of the data packet. If the SL SPS resource reallocation unit 12 determines that the SL SPS service satisfying the reallocation condition exists according to the preset reallocation condition, the eNB further determines whether there are remaining control resources and service resources, that is, whether there are remaining PDCCH and corresponding PSCCH and pscsch resources, and if one of the remaining resources is exhausted, it is considered that there are no remaining resources. If the SL SPS resource reallocation unit 12 determines that there are remaining control resources and service resources, then reallocating SL SPS resources for the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount, and the updated SL SPS configuration time.

The SL SPS resource allocation unit 13 is specifically configured to: if the new access service of the SL SPS is judged to exist and the residual control resource and service resource exist, the SPS resource is allocated to the corresponding UE according to the SL SPS period, the SL SPS data quantity and the SL SPS configuration time.

The SL SPS resource allocation unit 13 first determines whether or not there is a new SL SPS access service. The SL SPS resource allocation unit 13 obtains service model related information, such as a service period, a time offset, SL priority information, and a message size of a maximum TB in the service model, by using auxiliary information reported by the UE, and obtains configuration parameters required for semi-persistent scheduling resource allocation in combination with BSR reported by the UE and historical statistics, including a SL SPS period, a SL SPS data amount, and a SL SPS configuration time. The arrival time of the data packet can be determined according to the service period and the offset, and the corresponding SL SPS configuration time can be determined according to the arrival time of the data packet. If the SL SPS new access service is judged to exist, whether the residual control resource and service resource exist or not is further judged, namely, whether the residual PDCCH and the corresponding PSCCH and PSSCH resources exist or not is judged, and if one of the resources is exhausted, the fact that the residual resources do not exist is considered. If the SL SPS resource allocation unit 13 determines that there are remaining control resources and service resources, SL SPS resources are configured for the corresponding UE according to the SL SPS period, the SL SPS data amount, and the SL SPS configuration time.

The embodiment of the invention can more effectively utilize and allocate resources and improve the utilization rate of the resources and the system capacity by giving out the classification and the priority processing process of the SL SPS service on the premise of guaranteeing the QoS of the user.

Further, based on the above embodiment, the SL SPS resource reallocation unit 12 or the SL SPS resource allocation unit 13 is further configured to: the SL SPS resources are configured at two SL SPS processes, the two SL SPS processes having different SL SPS periods.

The SL SPS resource reallocating unit 12 or the SL SPS resource allocating unit 13 obtains service model related information through auxiliary information reported by the UE, and determines whether two SL SPS processes need to be configured for the UE according to BSR reported by the UE and historical statistical information, if it is determined that two SL SPS periods are configured for the UE, resources are more reasonably utilized, and resource waste is reduced, the SL SPS resource reallocating unit 12 or the SL SPS resource allocating unit 13 configures two SL SPS periods for the UE. For example, the SL SPS data volume is divided into (X-Y) byte packets and Y byte packets, which are transmitted in two SL SPS processes, respectively. And activating the scheduling resource of one SL SPS period at the configuration time, wherein the activation of the scheduling resource of the second SL SPS period is performed in the next downlink subframe or special subframe. So far, the time-frequency domain resource allocation of the dual-period SL SPS resource is completed.

Further, based on the above embodiment, the SL SPS resource reallocation unit 12 is further configured to: if any parameter of the SL SPS period, the SL SPS data amount, and the SL SPS configuration time is changed and meets a threshold requirement of the SL SPS configuration time, the reallocation condition is met, and SL SPS resources need to be reallocated for the UE; and if the current TTI moment is in the time range of the updated SL SPS configuration moment, reallocating SL SPS resources for the UE.

After acquiring the configuration parameters required for scheduling, SL SPS resource reallocation section 12 determines the following conditions, and if any one of the conditions is satisfied, it is considered that SL SPS reallocation is required.

3) The SL SPS data volume of the data packet is changed, the allocated sub-channel length of the required configuration is not matched, and the threshold requirement is met: the number of physical resource blocks that need to be allocated varies.

If the current TTI is within the time range of the updated SL SPS configuration time, then the SL SPS resource reallocation unit 12 reallocates SL SPS resources for the UE; and if the current TTI time is not in the time range of the updated SL SPS configuration time, judging in the next scheduling period.

On the basis of the embodiment, the embodiment of the invention reallocates SL SPS resources for the UE when the reallocation condition is met by setting the reallocation condition, ensures that SL SPS resource allocation is dynamically adjusted according to the V2X service requirement, can meet the function requirement of V2X by quick reallocation, improves the efficiency and quality of resource utilization, and ensures normal development of V2X service; through reasonable setting of configuration time, normal operation of SL SPS resource reallocation is ensured.

Further, based on the above embodiment, the SL SPS resource allocation unit 13 is further configured to: and if the current TTI time is in the time range of the SL SPS configuration time of the UE, the SLSPS resource is allocated for the UE.

The SL SPS resource allocation unit 13 allocates SL SPS resources to the corresponding UE according to the SL SPS period, the SL SPS data amount, and the SL SPS configuration time, and allocates SL SPS resources to the UE if the current TTI time is within the time range of the SL SPS configuration time of the UE; if the current TTI time is not in the time range of the SL SPS configuration time of the UE, judging in the next scheduling period.

Further, based on the above embodiment, the SL SPS resource release unit 11 determines the priority of release of the SL SPS resources in a first-in first-out order; the SL SPS resource reallocation unit 12 determines the priority of the reallocated SL SPS resources according to the emergency situation of service processing and Qos requirements; the SL SPS resource allocation unit 13 determines the priority of the allocated SL SPS resources according to the priority information provided by the UE and the configuration time.

The embodiment of the invention sets the internal processing priority for each of the SL SPS resource release unit 11, the SL SPS resource reallocation unit 12, and the SL SPS resource allocation unit 13. Wherein the SL SPS resource release unit 11 determines the priority of the released SPS resources in a first-in first-out order.

The SL SPS resource reallocation unit 12 determines the priority of the reallocated SPS resources according to the emergency situation of service processing and Qos requirements; based on the principle, the internal priority ordering is performed according to the service period, the time offset and the change condition of the data packet size, wherein the priority of the shorter service period is higher than that of the longer service period, the priority of the shorter service period which does not meet the time delay requirement is higher than that of the time offset which meets the time delay requirement but can be finely adjusted because of the change of the time offset, and the priority of the larger data packet is higher than that of the smaller data packet.

The SL SPS resource allocation unit 13 determines the priority of the SPS resource allocation according to the priority information provided by the UE and the configuration time, and configures the priority with the earlier configuration time, where the same configuration time is ordered according to the priority level according to the priority information provided by the UE.

On the basis of the above embodiment, the embodiment of the present invention further satisfies the service requirement by setting the internal processing priority for the SL SPS resource release unit 11, the SL SPS resource reallocation unit 12, and the SL SPS resource allocation unit 13, and ensures the reasonability of SL SPS resource reallocation.

Further, based on the above embodiment, the SL SPS resource reallocation unit 12 or the SL SPS resource allocation unit 13 is further configured to:

Whether the SL SPS new service is accessed or the SL SPS service is reconfigured due to some factors, there may be situations in the transmission that require secondary retransmissions. Firstly, the SL SPS resource reallocating unit 12 or the SL SPS resource allocating unit 13 allocates the time-frequency domain resources of the primary transmission to the corresponding UE according to the SL SPS period, the SL SPS data amount and the SL SPS configuration time, and then determines whether secondary transmission is required, that is, whether retransmission is required, and if it is determined that secondary transmission is required, allocates the time-frequency domain resources of the retransmission to the SL SPS service. The SL SPS period of retransmission in the time domain is the same as that of initial transmission, and resources of corresponding bytes are planned in the frequency domain. The primary transmission resource and the retransmission resource are indicated to the UE through one DCI. And finally, packaging the PDCCH, distributing SL SPS service resources, and outputting SL SPS scheduling information to a physical layer.

Further, based on the above embodiment, the time-frequency domain resource of the retransmission in the SL SPS resource reallocation unit 12 or the SL SPS resource allocation unit 13 is different from the time-frequency domain resource of the initial transmission; the method for judging whether secondary transmission is needed specifically comprises the following steps: judging whether secondary transmission is needed or not according to the reliability requirement of the service and the shortage condition of network side resources.

The SL SPS resource reallocation unit 12 or the SL SPS resource allocation unit 13 determines whether secondary transmission, that is, whether retransmission is required, and specifically performs comprehensive determination according to service characteristics such as whether reliability requirements are high, and the utilization condition of network side resources such as whether network side resources are tense. And if judging that secondary transmission is needed, distributing the time-frequency domain resources of retransmission for the SL SPS service. The retransmitted time-frequency domain locations cannot be scheduled using the original, i.e., as yet unplanned, time-frequency domain resources.

The device provided by the embodiment of the invention is used for the method, and specific functions can refer to the flow of the method and are not repeated here.

Fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present invention. As shown in fig. 4, the computer device 1 includes a processor 401, a memory 402, and a bus 403. Wherein the processor 401 and the memory 402 complete communication with each other through the bus 403; the processor 401 is configured to call the program instructions in the memory 402 to perform the methods provided in the above method embodiments, for example, including: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, authorizing the UE to release the SL SPS resource; if judging that the SL SPS service meeting the reassignment condition exists and has the remained control resources and service resources, reassigning SL SPS resources to the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time; if the new access service of the SL SPS is judged to exist and the residual control resource and service resource exist, the SPS resource is allocated to the corresponding UE according to the SL SPS period, the SL SPS data quantity and the SL SPS configuration time.

Embodiments of the present invention disclose a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the method embodiments described above, for example comprising: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, authorizing the UE to release the SL SPS resource; if judging that the SL SPS service meeting the reassignment condition exists and has the remained control resources and service resources, reassigning SL SPS resources to the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time; if the new access service of the SL SPS is judged to exist and the residual control resource and service resource exist, the SPS resource is allocated to the corresponding UE according to the SL SPS period, the SL SPS data quantity and the SL SPS configuration time.

Embodiments of the present invention provide a non-transitory computer readable storage medium storing computer instructions that cause a computer to perform the methods provided by the above-described method embodiments, for example, including: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, authorizing the UE to release the SL SPS resource; if judging that the SL SPS service meeting the reassignment condition exists and has the remained control resources and service resources, reassigning SL SPS resources to the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time; if the new access service of the SL SPS is judged to exist and the residual control resource and service resource exist, the SPS resource is allocated to the corresponding UE according to the SL SPS period, the SL SPS data quantity and the SL SPS configuration time.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.

The embodiments of computer devices and the like described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The semi-persistent scheduling resource allocation method is characterized by comprising a SL SPS resource release flow, a SL SPS resource reallocation flow and a SL SPS resource allocation flow;

the SL SPS resource release process is executed first, and specifically comprises the following steps: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, authorizing the UE to release the SL SPS resource;

and executing the SL SPS resource reallocation process, which specifically comprises the following steps: if judging that the SL SPS service meeting the reassignment condition exists and has the remained control resources and service resources, reassigning SL SPS resources to the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time;

2. The method of claim 1, wherein the reallocating SL SPS resource flow or the allocating SL SPS resource flow further comprises: the SL SPS resources are configured at two SL SPS processes, the two SL SPS processes having different SL SPS periods.

3. The method of claim 1, wherein the reallocating SL SPS resource flow further comprises: if any parameter of the SL SPS period, the SL SPS data amount, and the SL SPS configuration time is changed and meets a threshold requirement of the SL SPS configuration time, the reallocation condition is met, and SL SPS resources need to be reallocated for the UE; and if the current TTI moment is in the time range of the updated SL SPS configuration moment, reallocating SL SPS resources for the UE.

4. The method of claim 1, wherein the allocating SL SPS resource flow further comprises: and if the current TTI time is in the time range of the SL SPS configuration time of the UE, SL SPS resources are allocated to the UE.

5. The method of claim 1, wherein the release SL SPS resource flow determines the priority of the release SL SPS resources in a first-in, first-out order; the process of reallocating SL SPS resources determines the priority of the reallocated SL SPS resources according to the emergency situation of service processing and Qos requirements; and the SL SPS resource allocation flow determines the priority of the SL SPS resources according to the priority information provided by the UE and the configuration time.

6. The method of claim 1, wherein the reallocating SL SPS resource flow or the allocating SL SPS resource flow further comprises:

7. The method of claim 6, wherein the time-frequency domain resources of the retransmission are different from the time-frequency domain resources of the initial transmission; the method for judging whether secondary transmission is needed specifically comprises the following steps: judging whether secondary transmission is needed or not according to the reliability requirement of the service and the shortage condition of network side resources.

8. A base station, comprising: the system comprises a SL SPS resource release unit, a SL SPS resource reallocation unit and a SL SPS resource allocation unit, wherein the SL SPS resource release unit, the SL SPS resource reallocation unit and the SL SPS resource allocation unit are sequentially processed;

the SL SPS resource release unit is specifically configured to: if judging that the SL SPS resource release requirement exists or the SL SPS service release request sent by the UE is received and the residual control resource exists, authorizing the UE to release the SL SPS resource;

the SL SPS resource reallocation unit is specifically configured to: if judging that the SL SPS service meeting the reassignment condition exists and has the remained control resources and service resources, reassigning SL SPS resources to the corresponding UE according to the updated SL SPS period, the updated SL SPS data amount and the updated SL SPS configuration time;

the SL SPS resource allocation unit is specifically configured to: if the new access service of the SL SPS is judged to exist and the residual control resource and service resource exist, the SPS resource is allocated to the corresponding UE according to the SL SPS period, the SL SPS data quantity and the SL SPS configuration time.

9. A computer device comprising a memory and a processor, said processor and said memory completing communication with each other via a bus; the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1-7.

10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method according to any one of claims 1 to 7.