CN109803321B

CN109803321B - Resource selection method and terminal under multiple services

Info

Publication number: CN109803321B
Application number: CN201711148939.2A
Authority: CN
Inventors: 冯媛; 周海军; 房家奕; 赵锐
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2017-11-17
Filing date: 2017-11-17
Publication date: 2020-12-08
Anticipated expiration: 2037-11-17
Also published as: CN109803321A

Abstract

The embodiment of the invention provides a resource selection method and a terminal, which are used for solving the technical problem that no clear and uniform processing mode exists when the terminal selects resources in the prior art. The method comprises the following steps: determining a resource reservation period of an arriving current service and a first occupied resource transmission opportunity corresponding to a first service before the current service, wherein the first occupied resource transmission opportunity is used for indicating a group of time-frequency resources of a service transmission packet selected by a resource selection node and used for transmitting the first service; performing resource exclusion on the time-frequency resource in a resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity to obtain a candidate resource set; wherein, the candidate time frequency resources included in the candidate resource set are not overlapped with the subframes of the time frequency resources in the first occupied resource transmission opportunity; and selecting the time-frequency resource for transmitting the current service from the candidate resource set according to the size of the service transmission packet of the current service and the resource reservation period.

Description

Resource selection method and terminal under multiple services

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a resource selection method and a terminal under multiple services.

Background

With the development of vehicle-mounted communication systems and the gradual maturity of mobile ad hoc network technologies, the realization of the real-time, dynamic and intelligent management of vehicles is concerned. At present, the protocol is described in terms of the exclusion of self-occupied resources in a multiprocess (multi-service) mode, which belongs to a passive processing mode.

In the prior art, the arrival of a service is random, and mainly includes the following two situations:

the first method comprises the following steps: the time interval between two service triggering selection is relatively large, when a certain service (new process) triggers selection/reselection, the first group of resources (such as initial transmission resources) after the rest service triggering selection/reselection is before a sensing window or in the sensing window.

And the second method comprises the following steps: the time points of two services triggering selection are relatively close, when a certain service (new process) triggers selection/reselection, a first group of resources (such as initial transmission resources) after triggering selection/reselection exist in the rest services, and the selection (selection) window is in or after the sending selection window.

In the existing standard, the resource selection and the new process are as follows: firstly, performing resource exclusion on resources in a selection window according to decoding and measurement information corresponding to SA successfully decoded in sending information; then, performing power smoothing according to the sending information, and determining a candidate resource set; finally, a suitable resource is selected from the determined set of candidate resources.

However, in the first case, when the initial transmission resource is before or within the sending window, the subframe where the part of resource is located is a skip subframe in the protocol, but the reserved resource for another node in the resource processing flow is only considered to be occupied next time. However, both the two resources are in the sending window or the initial transmission resource is in the sending window, and the retransmission resource is in the selection window, the two resources can be excluded through the existing protocol, but the existing standard also has similar processing, and the two resources are excluded from one occupation of other nodes. For the second case, no special processing is done for resource selection in the current standard, and further it is proposed in the standard that in order to guarantee single carrier characteristics, if multiple discontinuous resources occur within the same subframe, the transmission processing depends on implementation (packet loss processing is required). This situation may last for multiple frames and similar processing may be required for consecutive frames.

In summary, there is no explicit and uniform processing method for resource selection in the prior art.

Disclosure of Invention

The embodiment of the invention provides a resource selection method and a terminal under multiple services, which are used for solving the technical problem that no clear and uniform processing mode exists when the terminal selects resources in the prior art.

The embodiment of the invention provides the following specific technical scheme:

in a first aspect, an embodiment of the present invention provides a resource selection method, including the following steps:

determining a resource reservation period of an arriving current service and a first occupied resource transmission opportunity corresponding to a first service before the current service; wherein the first occupied resource transmission opportunity is used for indicating a group of time-frequency resources selected by a resource selection node and used for transmitting a service transmission packet of the first service;

performing resource exclusion on the time-frequency resource in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity to obtain a candidate resource set; wherein, the subframe where the candidate time frequency resource included in the candidate resource set is located is not overlapped with the subframe corresponding to the time frequency resource in the first occupied resource transmission opportunity;

and selecting the time-frequency resource for transmitting the current service in the candidate resource set according to the size of the service transmission packet of the current service and the resource reservation period.

In a possible implementation manner, performing resource exclusion on the time-frequency resource in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity includes:

determining a group of time frequency resource transmission opportunities corresponding to each candidate time frequency resource in the resource selection window according to the resource reservation period and the configured resource selection parameters;

and if the transmission opportunity of a group of time frequency resources corresponding to the candidate time frequency resources is determined to be overlapped with the first occupied resource transmission opportunity, excluding the candidate time frequency resources in the resource selection window.

In a possible implementation manner, after performing resource exclusion on the time-frequency resource in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource, and before obtaining a candidate resource set, the method further includes:

and according to the standard flow of a resource selection protocol, performing resource exclusion processing on the skip subframe in the sensing window, and performing resource exclusion processing according to the information received and measured by the scheduling control signaling SA.

In a possible implementation manner, before performing resource exclusion on the time-frequency resource in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource, the method further includes:

according to the standard flow of a resource selection protocol, resource exclusion processing is carried out on skip subframes in a sensing window;

and according to the standard flow of the resource selection protocol, performing resource exclusion processing according to the information received and measured by the scheduling control signaling SA.

In a possible embodiment, after obtaining the candidate resource set, the method further comprises:

performing power smoothing on the candidate time-frequency resources in the candidate resource set, and determining target candidate time-frequency resources with smoothing power lower than a preset power value;

then, selecting a time-frequency resource for transmitting the current service in the candidate resource set according to the size of the service transmission packet of the current service and the resource reservation period, including:

selecting time frequency resources with the quantity corresponding to the transmission times from the target candidate time frequency resources according to the size of the service transmission packet, the resource reservation period and the transmission times; and when the transmission times is more than or equal to 2, the time interval between two subframes corresponding to the two correspondingly selected time-frequency resources is in the resource reservation period, and the two subframes are not overlapped.

In a second aspect, an embodiment of the present invention provides a terminal, including:

a receiver for receiving a plurality of services;

a processor, configured to determine a resource reservation period of an arriving current service and a first occupied resource transmission opportunity corresponding to a first service before the current service, perform resource exclusion on a time-frequency resource in a resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity, obtain a candidate resource set, and select a time-frequency resource for transmitting the current service in the candidate resource set according to a size of a service transmission packet of the current service and the resource reservation period;

wherein the first occupied resource transmission opportunity is used to indicate a group of time-frequency resources selected by the resource selection node and used to transmit the service transmission packet of the first service, and the subframe where the candidate time-frequency resource included in the candidate resource set is located is not overlapped with the subframe corresponding to the time-frequency resource in the first occupied resource transmission opportunity.

In a possible embodiment, the processor is configured to:

In a possible embodiment, the processor is further configured to:

and after resource exclusion is carried out on the time-frequency resources in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resources, resource exclusion processing is carried out on skip subframes in the sensing window according to a standard flow of a resource selection protocol before a candidate resource set is obtained, and the resource exclusion processing is carried out according to the information received and measured by the scheduling control signaling SA.

In a possible embodiment, the processor is further configured to:

and before resource exclusion is carried out on the time-frequency resource in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource, resource exclusion processing is carried out on the skip subframe in the sensing window according to a standard flow of a resource selection protocol.

In a possible implementation, the processor is further configured to:

and after the time-frequency resource in the resource selection window corresponding to the current service is subjected to resource exclusion according to the resource reservation period and the first occupied resource and before a candidate resource set is obtained, performing resource exclusion processing according to the standard flow of a resource selection protocol and the receiving and measuring information of the scheduling control signaling SA.

In a possible embodiment, the processor is further configured to:

after the candidate resource set is obtained, performing power smoothing processing on the candidate time-frequency resources in the candidate resource set, and determining target candidate time-frequency resources with smoothing power lower than a preset power value;

In a third aspect, an embodiment of the present invention provides a terminal, including:

the system comprises a determining module, a resource reservation module and a resource allocation module, wherein the determining module is used for determining a resource reservation period of an arriving current service and a first occupied resource transmission opportunity corresponding to a first service before the current service; wherein the first occupied resource transmission opportunity is used for indicating a group of time-frequency resources selected by a resource selection node and used for transmitting a service transmission packet of the first service;

a processing module, configured to perform resource exclusion on the time-frequency resource in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity, to obtain a candidate resource set; wherein, the subframe where the candidate time frequency resource included in the candidate resource set is located is not overlapped with the subframe corresponding to the time frequency resource in the first occupied resource transmission opportunity;

and the selection module is used for selecting the time-frequency resource for transmitting the current service in the candidate resource set according to the size of the service transmission packet of the current service and the resource reservation period.

In a fourth aspect, an embodiment of the present invention provides a computer apparatus, where the computer apparatus includes a processor, and the processor is configured to implement the method according to the first aspect when executing a computer program stored in a memory.

In a fifth aspect, the present invention provides a computer-readable storage medium storing computer instructions, which when executed on a computer, cause the computer to perform the method according to the first aspect.

In the embodiment of the invention, the resource reservation period of the current service and the first occupied resource transmission opportunity of the first service before the current service are acquired, so that the resource exclusion can be performed on the time-frequency resource in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity, a candidate resource set with non-overlapping subframes and the time-frequency resource in the first occupied resource transmission opportunity is acquired, and then the proper time-frequency resource is selected from the candidate resource set to transmit the service transmission packet of the current service, thereby effectively avoiding resource collision, reducing the packet loss rate and improving the system performance.

Drawings

Fig. 1 is a flowchart of a resource selection method under multiple services in an embodiment of the present invention;

FIG. 2 is a timing diagram corresponding to an arrival service in an embodiment of the present invention;

FIG. 3 is a diagram illustrating a process of excluding self-occupied resources according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating an example of an effective SA in a sensing window according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating a collision between an occupied resource and a candidate resource according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating power smoothing of remaining resources not excluded from the resources within the selection window according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a terminal in an embodiment of the present invention;

fig. 8 is a block diagram of a terminal according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a computer device according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

First, a brief description will be given of the flow of resource selection/reselection in the existing standard.

In the existing standard, the resource selection/reselection process mainly includes the following steps:

1. according to the decoding and measurement information corresponding to the SA successfully decoded in the sending information of other nodes acquired by the receiving and sending node in the sending window, resource exclusion is carried out on the resources in the resource selection window;

2. performing power smoothing according to the sending information, and determining a candidate resource set;

3. selecting a suitable resource from the determined candidate resource set.

The resource exclusion process is to select the time-frequency resource in the selection window (selection), but the information that can be acquired by the resource selection node at present is only the information in the sending window, so that the occupation condition of the resource in the selection window needs to be inferred according to the acquired information in the sending window, and the time-frequency resource in the selection window is further screened to exclude the occupied time-frequency resource.

In the prior art, resource exclusion mainly includes the following processes:

first, the valid latest SA is determined, which reserves the SA that belongs to the time-frequency resource in and after the selection window in time for the latest time.

Secondly, excluding candidate subframes corresponding to skip subframes according to a period configured by the system;

then, resource exclusion is performed according to the SA reception and measurement information, that is, resource exclusion is performed according to the subframe in which the SCI is monitored.

That is, in the resource selection window, the SA of the decoded time-frequency resource indicates the next resource reservation and collides with a Transport Block (TB) sent by the candidate resource or a TB sent by a subsequent resource corresponding to the candidate resource, and the decoded SA performs physical downlink shared Channel (psch) -Reference Signal Received Power (RSRP) measurement, and the measurement value is higher than the RSRP threshold, so as to exclude the candidate resource.

The resource elimination process is to judge whether the occupied resources collide with the candidate resources of the UE, and eliminate the time-frequency resources for sending the collisions to obtain a candidate resource set including the candidate resources, so as to perform power smoothing on the candidate resources in the candidate resource set, screen the time-frequency resources with lower smoothing power, perform resource selection, and select a suitable time-frequency resource to transmit the service transmission packet of the current service.

The technical solutions of the embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1, an embodiment of the present invention provides a method for selecting resources under multiple services, where the method may be applied to a terminal, and the method may include the following steps:

s11: determining a resource reservation period of an arriving current service and a first occupied resource transmission opportunity corresponding to a first service before the current service; the first occupied resource transmission opportunity is used for indicating a group of time-frequency resources which are selected by the resource selection node and used for transmitting the service transmission packet of the first service.

In the embodiment of the present invention, the resource reservation period of the current service is known by the terminal, and may be used to indicate a period of a time-frequency resource, such as 20ms or 50ms, that is selectable for transmitting a transmission packet of the current service.

The current service may be a currently reached service in a multi-service (multi-process) scenario, which will trigger the resource selection node to select/reselect time-frequency resources for transmission of the current service. The other service (for example, the first service) before the current service triggers the first group of resource transmission opportunities (in the embodiment of the present invention, the initial transmission resource is taken as an example) corresponding to the selected/reselected resource, and the time-frequency resource reserved by the first group of resource transmission opportunities may be located before or within the sending window, that is, the time interval between the current service and the first service trigger the selection is larger. Alternatively, the first set of resource transmission opportunities may be within or after the selection window following the sending window, i.e. the time interval between the current traffic and the first traffic trigger selection may be closer.

As shown in fig. 2, it is a timing diagram corresponding to a service, where a sensing window is a sliding window with a fixed window length, for example, if a time of a current service reaching a corresponding subframe is m, if the window length of the sensing window is 1000ms, the window range of the sensing window corresponding to the current service is [ m-1000, m-1], and the window length range of a corresponding selection window may be [ m + T1, m + T2], where T1 and T2 are parameters that are fixedly set by the system. The sending window comprises a plurality of receiving and sending nodes of time frequency resources and is used for transmitting service transmission packets of related services, and the selection window comprises selectable time frequency resources.

S12: performing resource exclusion on the time-frequency resource in a resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity to obtain a candidate resource set; and the subframe in which the candidate time-frequency resource included in the candidate resource set is located is not overlapped with the subframe corresponding to the time-frequency resource in the first occupied resource transmission opportunity.

In the embodiment of the present invention, the candidate time-frequency resources included in the candidate resource set are optional idle resources, and the subframe where the idle resource is located is unoccupied.

Specifically, when resource exclusion is performed on the time-frequency resources in the resource selection window of the current service according to the resource reservation period and the multiple time-frequency resources included in the first occupied resource transmission opportunity in S12, a group of transmission opportunities corresponding to each candidate time-frequency resource in the resource selection window may be determined according to the resource reservation period and the configured resource persistence parameters; the configured RESOURCE duration parameter may refer to current SL _ RESOURCE _ reservation _ COUNTER, which may be used to represent a duration of a time-frequency RESOURCE corresponding to a service transport packet.

A group of transmission opportunities corresponding to one time-frequency resource in the resource selection window can be used to characterize a group of time-frequency resources, which may transmit a service transmission packet, corresponding to a subframe in which a corresponding candidate time-frequency resource is located in the resource selection window according to a resource reservation period, and is also referred to as grants, where grants in this document mainly refers to grants that are not yet sent after the sending window.

For example, if the resource reservation period is 100ms, and the subframe corresponding to the candidate resource in the selection window is n (unit: ms), the subframes corresponding to the time-frequency resource that can be included in the set of transmission opportunities that can be determined correspondingly include n +100ms, n +200ms, n +300ms, and … …, that is, the transmission opportunities are determined in a backward manner.

Meanwhile, because the starting positions of the subframes corresponding to the candidate time-frequency resources may be different from the starting position of the resource selection window, the subframes corresponding to the time-frequency resources, such as n-100ms, n-200ms, and … …, are determined in the resource selection window in a forward-backward manner for each subframe in the resource selection window, and the time slot corresponding to the subframe does not exceed the current time.

Therefore, the set of subframes corresponding to the transmission opportunity determined in S12 is a set of time frequency resources determined in a forward and backward manner according to the subframe corresponding to each candidate time frequency resource in the resource selection window and the resource reservation period.

Further, after determining a group of transmission opportunities corresponding to each candidate time-frequency resource in the resource selection window, it may be determined whether a group of transmission opportunities corresponding to each candidate time-frequency resource overlaps with a first occupied resource transmission opportunity, where the first occupied resource transmission opportunity may refer to a first group of time-frequency resources after the first service is triggered to be selected/re-selected, and the description is mainly given by taking a case where the first group of time-frequency resources is an initial transmission resource as an example.

In practical applications, if the existing resources include: resource 1, and a set of candidate resources { gradts } determined from the selected resources. If each resource in a group of grants corresponding to the resource 1 falls down according to the time sequence and according to the step length (resource reservation period) corresponding to the resource 2, all the candidate time-frequency resources on the subframe where the candidate time-frequency resource in the corresponding selection window is located can be excluded.

In the RESOURCE selection window, the sub-frames are taken as the granularity, for each sub-frame, possible occupied RESOURCEs can be determined to be reserved by 10 × SL _ RESOURCE _ reservation _ COUNTER according to the forward mode and the step length (namely the RESOURCE reservation period) corresponding to the RESOURCE 2, and if the occupied time-frequency RESOURCEs are overlapped with the sub-frame where the grants corresponding to the RESOURCE 1 are located, the sub-frame can be eliminated.

For example, if prior to the current service, the existing resources include: resource 1, and a set of candidate resources { gradts } determined from the selected resources. If the possible sub-numbers { grants } corresponding to the RESOURCE 1 and 10 × SL _ RESOURCE _ reset _ COUNTER corresponding to the RESOURCE 2 selected by the RESOURCE selection node for the current service belong to the same subframe, the RESOURCE is excluded, and the collision of time-frequency RESOURCEs is avoided.

The process of S12 may be referred to herein as an "exclusion of self-occupied resources" process. The process is specifically illustrated by way of example in conjunction with the foregoing description.

If the existing resources are: resource 1, with a reservation period of P1, and a group of grants determined according to the selected resource, wherein the corresponding time interval between two adjacent grants in the grants is P1; resources that need to be selected: the reservation period is P2.

FIG. 3 is a schematic diagram illustrating the process of excluding self-occupied resources. In the figure, the dashed arrows within the selection window represent a first group of existing resources (i.e., resource 1) followed by a corresponding plurality of resources (10 × COUNTER) for maintenance (not shown). Then, when processing each subframe in the resource selection window, it can be determined whether { each subframe + P2 × M } overlaps with the subframe where the grants in resource 1 are located, where M is 1, 2, … …, C_{r e}L and C_{r e}SL _ RESOURCE _ reset _ COUNTER 10. If there is overlap, this subframe is excluded.

It should be noted that, in the process of excluding the self-occupied resources, it is determined whether the resource after the sending window is the first group of existing resources, that is, whether resource 1 has already been sent, and the same processing manner is applied to the grant that has not been sent yet.

In the embodiment of the invention, through eliminating the self-occupied resources, the resource collision can be effectively avoided, the packet loss rate is reduced, and the system performance is improved.

In the embodiment of the present invention, the elimination of the self-occupied resource through S12 may be performed by combining with a resource elimination processing method in a standard flow of an existing resource selection protocol, and a standard resource elimination manner that can combine the self-occupied resource elimination manner will be described below:

the first method is as follows: and performing resource exclusion on the skip subframe.

A skip subframe refers to a subframe that cannot be perceived because a terminal (User Equipment, UE) itself transmits on some subframe(s) within a sensing window.

And (4) excluding resources of the skip subframe, which means that candidate subframes corresponding to the skip subframe are excluded actually. And supposing that other UE on the subframe reserves the next resource in all the periods configured by the system, and the subframe where the reserved resource is positioned overlaps with the candidate subframe of the skip subframe or overlaps with the 1, 2, …, 10 × counter-1 time sending subframe behind the candidate subframe, excluding the candidate subframe.

For example, if the system is configured to transmit short-period services with a duration of less than 100ms (e.g., the service has a subscription period of 20ms, 50ms, etc.). If the UE transmits within a short period before the TB arrives, e.g. the skip subframe exclusion condition is met, then (100 ms/short period) candidate subframes may be excluded. If the system supports 20ms service, and the resource selects the UE to transmit in the time range of [ n-20ms, n), and the candidate subframe y meets the condition of corresponding exclusion of the skip subframe, it can be determined to exclude 5 candidate subframes of y, y +20ms, y +40ms, y +60ms, and y +80 ms.

The second method comprises the following steps: and performing resource exclusion according to the SA receiving and measuring information, namely performing resource exclusion on SCI resource reservation.

Due to differences in service initiation point, Semi-Persistent Scheduling (SPS) resource duration (denoted as SPS counter value), and service period (SPS period: i × P). The number of SAs and the information such as the interval of SAs of other nodes received by the node in the sensing window may be different. In fig. 3, the number of SAs received by the node in the sending window corresponds to one TB, which includes an initial SA and a retransmission SA.

In this approach, first, the latest SA that is valid is determined.

The valid latest SA reserves the SA that belongs to the time-frequency resource in and after the selection window in time for the latest time. Because the maintenance duration of the node SPS resource belongs to the information maintained in the node, the information which can be obtained by other nodes is only whether to reserve or not next time. Therefore, from the perspective of the receiving node, the information of other nodes acquired in the sending window is valid only by the last SA which reserves the time-frequency resource in the selection window and behind the selection window.

For example, in the sensing window shown in fig. 4, assuming that the SPS period of node a is 100ms, if the latest SA indicates that the resource is reserved continuously and the subsequent resource belongs to the resource selection window, the SA is valid; assuming that the SPS period of the node B is 100ms, if the resource reserved by the latest SA belongs to the sending window, the SA is invalid, which may be caused by topology change or channel change; assuming that the SPS period of the node C is 1s, if the resource of the SA to which it newly subscribes belongs to the selection window in time, the SA is valid.

Then, whether the candidate resource in the resource selection window simultaneously meets the following two conditions is judged, and if yes, the candidate resource is excluded.

The SA indicates the next resource reservation and collides with the TB sent by the candidate resource or the TB sent by the subsequent time-frequency resource corresponding to the candidate resource.

That is, if according to the SA indication: if it is determined that the indicated occupied resources collide with the TBs sent by the resource selection UE on the candidate resources, that is, the sending SA node reserves the time-frequency resources in the resource selection window, as shown by the node a in fig. 4, the reserved resources of the node a may be excluded.

What needs to be added here is: the SA here refers to TB-sized, i.e. includes an initial SA and a retransmission SA. Whether the initial SA and/or the retransmission SA are decoded correctly, the corresponding 2-time data resource occupation can be determined.

Or, if according to the SA indication: it is determined that the indicated occupied resource may collide with a TB transmitted by the resource selection UE on a subsequent resource of the candidate resources, that is, although the SA transmission node does not reserve a resource in the selection window, for example, the resource reserved by the SA transmission node is outside the selection window, if the SA transmission node selects a certain resource in the selection window, there is a possibility that a future subsequent TB after the first TB is transmitted by the resource selection UE may collide with the SA transmission node, as shown in fig. 5, which is a schematic diagram of determining whether the occupied resource may collide with the candidate resource of the UE, shown in fig. 5 as node C.

There are additional points to be explained here: (1) the standard specification is that the resource in the selection window is mapped to the future by taking the period determined by the selected resource node as the granularity according to a time axis, and the mode is consistent with the mapping to the past by taking the period determined by the selected resource node as the granularity according to the time axis of the resource reserved next time by the SA sending node; (2) number of steps mapped (window length/range): 1, 2, …, 10 × counter-1; (3) the SA here refers to TB granularity, i.e. including initial transmission and retransmission. Whether the SA is decoded correctly for the first time and/or the retransmission or not, the corresponding 2-time data resource occupation can be determined; (4) from the point of view of avoiding collisions as much as possible, the subsequent possible resource reservations of the sending SA node need to be taken into account, where, according to the latest conclusion of the standard development, the sending SA node is considered to reserve resources only once.

And secondly, the decoded SA carries out PSSCH-RSRP measurement and excludes the resource with the measurement value higher than the RSRP receiving power threshold.

From the power measurement point of view, determining that resource occupancy is an effective occupancy for selecting a resource node, takes into account: the distance between the node corresponding to the effective latest SA and the node selecting the resources is within the effective range of resource multiplexing, so that the situation that the distance between the two nodes is out of the effective range of resource multiplexing, namely the two nodes are far away and can be subjected to spatial multiplexing substantially without spatial multiplexing is avoided. Here, the instantaneous PSSCH-RSRP value of the data (data) resource corresponding to the latest 1-time SA is compared with the corresponding pair of power thresholds.

There are additional points to be explained here: (1) the granularity of the SA is TB granularity, and includes an initial SA and a retransmission SA, that is, whether the initial SA and/or the retransmission SA is received, the corresponding 2-time data (data) resource occupation can be determined. Here, a similar process is used for the data field measurements: if the initial transmission SA and the retransmission SA are correctly received, independent measurement can be carried out on the respective associated data fields; if one of the times is not received correctly, another time of measurement node of the data field can be used instead. (2) And (3) measuring the particle size: the RE of each Demodulation Reference Signal (DMRS) pilot is measured, and the average RE granularity is calculated after adding the RE to the corresponding subchannel or set of subchannels. (3) The measurement here is independent of whether the data field is decoded correctly. (4) There are certain equivalent estimates here: using the measurement quantity of the Data field associated with the corresponding latest effective SA in the sending window to represent the measurement quantity of the corresponding resource in the corresponding selection window; and replacing the spatial distance between the two nodes in the subsequent time by the spatial distance between the two nodes at the time point of the corresponding latest effective SA in the current sending window.

Further, excluding candidate resources satisfying (i) and (ii) from the resource selection window may include the following cases:

case 1: if the resource reservation period of the received SA indication is greater than or equal to 100ms, only the resource reservation period of the next 1 time indicated by the SA indication needs to be excluded.

Case 2: if the resource reservation period of the received SA indication is a short period (20ms, 50ms) less than 100ms and the time of receiving the SA indication is in the range of [ n-short period, n), then the reserved resource of the next (100/short period) time of the SA indication is excluded.

For example, if the resource reservation period after receiving the SA indication is 20ms, and the SA is received in the time range of [ n-20ms, n), and the receiving time is denoted as x, it is necessary to consider excluding the candidate resources corresponding to the 5 reserved resources of x +20ms, x +40ms, x +60ms, x +80ms, and x +100 ms.

Case 3: if the resource reservation period of the received SA indication is a short period (20ms, 50ms) less than 100ms, but the time of receiving the SA is not in the range of [ n-short period, n), then only the next 1 reserved resource of the SA indication needs to be excluded.

In the embodiment of the present invention, when the processing procedure of excluding the self-occupied resource in S12 is combined with the first and second ways in the standard flow to perform resource exclusion, the following steps may be performed:

form 1: self-occupied resource exclusion → skip subframe exclusion → resource exclusion based on SA reception and measurement information (i.e. exclusion of SCI resource reservation).

Form 2: skip subframe exclusion → self-occupied resource exclusion → resource exclusion based on SA reception and measurement information (i.e. resource exclusion processing for SCI resource reservation).

That is, when a specific resource is excluded, the skip subframe can be processed first, then the self-occupied resource is excluded, and finally the resource exclusion processing is performed on the SCI resource reservation; or, the self-occupied resources can be eliminated, then the skip subframe is processed, and finally the resource elimination processing is carried out on the SCI resource reservation.

After resource exclusion, the remaining selectable resources (i.e., candidate time-frequency resources) in the resource selection window form a candidate resource set, and subframes where the candidate time-frequency resources included in the candidate resource set are located are not overlapped with subframes corresponding to the time-frequency resources in the first occupied resource transmission opportunity.

S13: and selecting the time-frequency resource for transmitting the current service from the candidate resource set according to the size of the service transmission packet of the current service and the resource reservation period.

After obtaining the candidate resource set, the proportion (duty cycle) of the candidate time-frequency resources (also called remaining optional resources) in the resource selection window may be determined, which is as follows:

1) selecting a resource node to determine TBS of the TB to be sent according to the size of the current newly arrived service packet so as to determine the number of sub-channels;

2) determining the total number of resources according to the number of the sub-channels and the length of the selected resource window;

3) determining the number of the selectable resources: traversing in each sub-frame, sliding by taking a sub-channel or a sub-channel set meeting the required size as a unit, wherein only the sub-channel or the sub-channel set which does not contain any deducted resources in the sub-channel or the sub-channel set belongs to an effective sub-channel set;

4) and determining the proportion of the current remaining optional resources according to the effective subchannel set and the total resource number.

If the proportion of the current remaining selectable resources in the resource selection window is determined to be larger than or equal to the preset proportion, for example, 20%, ending the resource exclusion process; if the proportion of the remaining selectable resources is less than 20%, the power threshold of the current transceiver node may be increased, for example, the power threshold is increased by 3dB, and the initial value is the system configuration in each resource selection, and the resource is updated iteratively in the following steps, so as to reduce the resource multiplexing range, and facilitate resource exclusion again until the proportion of the selectable resources in the resource selection window is greater than or equal to the preset proportion.

And further, performing power smoothing on candidate time-frequency resources which are not excluded from the resources in the resource selection window, sequencing, and screening target candidate time-frequency resources with lower smoothing power, such as 20% of the time-frequency resources with the lowest power. The process is as follows:

1) selecting candidate time frequency resources: and selecting all the time-frequency resources left after the resource in the window is eliminated, no matter whether the corresponding sending window corresponding to the time-frequency resources has the corresponding SA successfully decoded.

2) And performing power averaging on the candidate time-frequency resources: if the service sending period of the resource selection UE is more than or equal to 100ms, the measurement period is 100 ms; if the service sending period of the resource selection UE is less than 100ms, the measurement period is the same as the service sending period of the resource selection UE; the measurements are averaged linearly (1000 ms/measurement period) within a 1s window, for example, a plurality of sub-channels are selected, and the measurements of each sub-channel are averaged linearly. The sending window of 1s contains 1000 physical subframes, and the physical subframes of the UE's transmission subframe and non-logical subframe do not need to be monitored. Fig. 6 is a schematic diagram illustrating power smoothing processing on the remaining resources within the selection window where the resources are not excluded.

3) And (3) processing S-RSSI measurement information of the corresponding resource: the granularity of measurement is sub-channel, without any special treatment, the linear average of the total power measured on each sub-channel, no matter which one of the following conditions the resource belongs to: 1. the SA corresponding to the whole resource is successfully decoded; 2. the SA corresponding to the whole resource is not successfully decoded; 3. the SAs corresponding to a portion of the subchannels of the resource are successfully decoded, and the SAs corresponding to another portion of the subchannels are not successfully decoded. And the difference of specific SA information on each resource does not need to be considered.

Further, resource selection is performed.

According to the size of the service transmission packet, the resource reservation period and the transmission times, selecting the time frequency resources with the quantity corresponding to the transmission times from the target candidate time frequency resources in the candidate resource set; when the transmission times is greater than or equal to 2, the time interval between two subframes corresponding to the two correspondingly selected time-frequency resources is in the resource reservation period, and the two subframes are not overlapped.

For example, the initial/retransmission resource selection process when the number of transmissions is 2: randomly selecting 2 resources from the 20% resources with the lowest power, and ensuring that the interval of the two resources is within [ -15, 15] subframes and the interval cannot be 0; initial/retransmission resource selection process when the transmission times is 1: only one resource needs to be randomly selected from the candidate resources.

Example two

Based on the same inventive concept, the embodiment of the present invention further provides a terminal, which may be configured to perform the resource selection method under multi-service as shown in fig. 1, and as shown in fig. 6, the terminal includes a transceiver 31 and a processor 32.

In practical applications, the transceiver 31 may comprise a receiver and a transmitter, and therefore the transceiver 31 comprises these two components in fig. 7 as an example.

In addition, a memory 33, shown in dashed lines in fig. 7, may also be included in the terminal. The memory 33 may be used for storing various data in the terminal, such as storing service data and the like.

The transceiver 31 may be used to receive services, for example, a plurality of services (i.e., new processes) issued by an upper layer.

The processor 32 is configured to determine a resource reservation period of an arriving current service and a first occupied resource transmission opportunity corresponding to a first service before the current service, perform resource exclusion on a time-frequency resource in a resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity, obtain a candidate resource set, and select a time-frequency resource for transmitting the current service in the candidate resource set according to a size of a service transmission packet of the current service and the resource reservation period.

Optionally, the processor 32 may be configured to determine a group of time-frequency resource transmission opportunities corresponding to each candidate time-frequency resource in the resource selection window according to the resource reservation period and the configured resource selection parameter; and if the transmission opportunity of a group of time frequency resources corresponding to the candidate time frequency resources is determined to be overlapped with the first occupied resource transmission opportunity, excluding the candidate time frequency resources in the resource selection window.

Optionally, the processor 32 is further configured to:

EXAMPLE III

As shown in fig. 8, an embodiment of the present invention provides a terminal, where the terminal base station may be configured to execute the resource selection method under multi-service as shown in fig. 1, and the terminal includes a determining module 21, a resource excluding module 22, and a selecting module 23.

Specifically, the determining module 21 may be configured to determine a resource reservation period of an arriving current service and a first occupied resource transmission opportunity corresponding to a first service before the current service; wherein the first occupied resource transmission opportunity is used for indicating a group of time-frequency resources selected by the resource selection node and used for transmitting the service transmission packet of the first service.

The resource excluding module 22 may be configured to perform resource exclusion on the time-frequency resource in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity, so as to obtain a candidate resource set; wherein, the subframe where the candidate time frequency resource included in the candidate resource set is located is not overlapped with the subframe corresponding to the time frequency resource in the first occupied resource transmission opportunity.

The selecting module 23 may be configured to select, according to the size of the service transmission packet of the current service and the resource reservation period, a time-frequency resource for transmitting the current service in the candidate resource set.

Optionally, the resource excluding module 22 is configured to: determining a group of time frequency resource transmission opportunities corresponding to each candidate time frequency resource in the resource selection window according to the resource reservation period and the configured resource selection parameters; and if the transmission opportunity of a group of time frequency resources corresponding to the candidate time frequency resources is determined to be overlapped with the first occupied resource transmission opportunity, excluding the candidate time frequency resources in the resource selection window.

Optionally, the resource excluding module 22 is further configured to: and after resource exclusion is carried out on the time-frequency resources in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resources, resource exclusion processing is carried out on skip subframes in the sensing window according to a standard flow of a resource selection protocol before a candidate resource set is obtained, and the resource exclusion processing is carried out according to the information received and measured by the scheduling control signaling SA.

Optionally, the resource excluding module 22 is further configured to: before resource exclusion is carried out on time-frequency resources in a resource selection window corresponding to the current service according to the resource reservation period and the first occupied resources, resource exclusion processing is carried out on skip subframes in a sensing window according to a standard flow of a resource selection protocol;

and the resource exclusion processing module is used for performing resource exclusion processing according to the standard flow of the resource selection protocol and the scheduling control signaling SA receiving and measuring information after performing resource exclusion on the time-frequency resource in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource and before obtaining the candidate resource set.

Optionally, the terminal further includes a processing module, configured to perform power smoothing processing on the candidate time-frequency resources in the candidate resource set, and determine a target candidate time-frequency resource with a smoothing power lower than a preset power value.

Then, the selection module 23 is configured to: according to the size of the service transmission packet, the resource reservation period and the transmission times, selecting the time frequency resources with the quantity corresponding to the transmission times from the target candidate time frequency resources obtained by the processing module; and when the transmission times is more than or equal to 2, the time interval between two subframes corresponding to the two correspondingly selected time-frequency resources is in the resource reservation period, and the two subframes are not overlapped.

Example four

Referring to fig. 9, the computer device according to an embodiment of the present invention further includes a processor 41, a memory 42, and a transceiver 43, which are connected via a bus. Wherein the transceiver 43 receives and transmits data, such as the transmitting/receiving SA, etc., under the control of the processor 41, the memory 42 stores therein a preset program, and the processor 41 is configured to implement the steps of the method provided in the first embodiment of the present invention when executing the computer program stored in the memory 42.

Alternatively, the processor 41 may be a central processing unit, an Application Specific Integrated Circuit (ASIC), one or more Integrated circuits for controlling program execution, a hardware Circuit developed by using a Field Programmable Gate Array (FPGA), or a baseband processor.

Optionally, processor 41 may include at least one processing core.

Alternatively, the Memory 42 of the electronic device may include a Read Only Memory (ROM), a Random Access Memory (RAM), and a disk Memory. The memory 42 is used for storing data required by the processor 41 in operation. The number of the memory 42 is one or more.

EXAMPLE five

The embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and when the computer instructions are run on a computer, the steps of the resource selection method under multiple services provided in an embodiment of the present invention may be implemented.

In the embodiments of the present invention, it should be understood that the disclosed network traffic monitoring method and network traffic monitoring system may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical or other form.

The functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be an independent physical module.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device, such as a personal computer, a server, or a network device, or a Processor (Processor), to execute all or part of the steps of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a Universal Serial Bus flash drive (USB), a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, and an optical disk.

The above embodiments are only used to describe the technical solutions of the present invention in detail, but the above embodiments are only used to help understanding the method of the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention. Variations or substitutions that may be readily apparent to one skilled in the art are intended to be included within the scope of the embodiments of the present invention.

Claims

1. A method for selecting resources under multiple services is characterized by comprising the following steps:

selecting a time-frequency resource for transmitting the current service in the candidate resource set according to the size of the service transmission packet of the current service and the resource reservation period;

performing resource exclusion on the time-frequency resource in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity, including:

2. The method of claim 1, wherein before obtaining the candidate resource set after resource exclusion of the time-frequency resources in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity, further comprising:

3. The method of claim 1, wherein before performing resource exclusion on the time-frequency resources within the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity, the method further comprises:

and according to the standard flow of the resource selection protocol, performing resource exclusion processing on the skip subframe in the sensing window.

4. The method of claim 3, wherein before obtaining the candidate resource set after resource exclusion of the time-frequency resources in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity, further comprising:

5. The method of any of claims 1-4, wherein after obtaining the set of candidate resources, the method further comprises:

6. A terminal, comprising:

a transceiver for receiving a plurality of services;

wherein the first occupied resource transmission opportunity is used to indicate a group of time-frequency resources selected by a resource selection node and used to transmit the service transmission packet of the first service, and subframes where candidate time-frequency resources included in the candidate resource set are located are not overlapped with subframes corresponding to the time-frequency resources in the first occupied resource transmission opportunity;

wherein the processor is configured to:

7. The terminal of claim 6, wherein the processor is further configured to:

and after resource exclusion is carried out on the time-frequency resources in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity, resource exclusion processing is carried out on skip subframes in the sensing window according to a standard flow of a resource selection protocol before a candidate resource set is obtained, and the resource exclusion processing is carried out according to the scheduling control signaling SA receiving and measuring information.

8. The terminal of claim 6, wherein the processor is further configured to:

and before resource exclusion is carried out on the time-frequency resources in the resource selection window corresponding to the current service according to the resource reservation period and the first occupied resource transmission opportunity, resource exclusion processing is carried out on skip subframes in the sensing window according to a standard flow of a resource selection protocol.

9. The terminal of claim 8, wherein the processor is further configured to:

and after the time-frequency resource in the resource selection window corresponding to the current service is subjected to resource exclusion according to the resource reservation period and the first occupied resource transmission opportunity, and before a candidate resource set is obtained, performing resource exclusion processing according to the standard flow of a resource selection protocol and the receiving and measuring information of the scheduling control signaling SA.

10. The terminal of any of claims 6-9, wherein the processor is further configured to:

11. A terminal, comprising:

a selecting module, configured to select, according to the size of the service transmission packet of the current service and the resource reservation period, a time-frequency resource for transmitting the current service from the candidate resource set;

wherein the processing module is further configured to:

12. A computer arrangement, characterized in that the computer arrangement comprises a processor for implementing the method according to any of claims 1-5 when executing a computer program stored in a memory.

13. A computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-5.