CN108024230A

CN108024230A - Resource selection method and equipment in a kind of V2X communications

Info

Publication number: CN108024230A
Application number: CN201710060123.8A
Authority: CN
Inventors: 张世昌; 李迎阳; 王轶
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2016-11-04
Filing date: 2017-01-24
Publication date: 2018-05-11
Anticipated expiration: 2037-01-24
Also published as: CN108024230B

Abstract

A kind of resource selection method in communicating present applicant proposes V2X, in this method, UE determines one or more configurations for sending resource pool of work at present carrier wave according to the instruction of pre-configured or eNB signalings first, then, UE sends resource pool according to the state and Channel Detection condition selecting of resource pool, and last UE selects transmission resource concurrence to send physical signal in transmission resource pool according to corresponding resource selection mode.The method proposed by the application, when the resource pool for allowing random sources to select loads relatively low, UE can select the resource pool as sending resource pool and selecting resource by the way of random sources selection, to reduce the power attenuation of UE.And when the load of above-mentioned resource pool is higher, another resource pool can be chosen as resource pool is sent by supporting the UE of incomplete Channel Detection, so as to reduce the loading level of the resource pool.This method can take into account the power attenuation of UE and the load control of resource pool, can effectively improve the overall performance of system.

Description

Resource selection method and equipment in a kind of V2X communications

Technical field

This application involves mobile communication technology field, specifically, this application involves car to extraneous information exchange V2X (Vehicle to Vehicle/Pedestrian/Infrastructure/Network) communication in resource selection method and Equipment.

Background technology

At present, device-to-device (Device to Device, D2D) communication technology by it in public safety field and general Huge potential value in logical commercial communication field, is received, and realized in 3GPP Rel-12 and Rel-13 by 3GPP standards The standardization of partial function.3GPP Rel-12 standards define the pattern of two kinds of D2D broadcast communications at present, referred to as pattern 1 (Mode 1) and pattern 2 (Mode 2).

The UE that wherein Mode 1 requires to send D2D broadcast communications must be the UE being located under the covering of cellular network.UE System broadcasts signaling by receiving eNB transmissions obtains Bypass Control channel (PSCCH, the Physical Sidelink of Mode 1 Control CHannel) resource pool configuration information, in the cycle and each cycle including PSCCH be used for PSCCH send out Physical Resource Block (PRB, the Physical Resource sent in the subframe position sent, and each subframe for PSCCH Block) position, UE detect the bypass scheduling (Sidelink Grant) of eNB before each PSCCH cycles, obtain the PSCCH The resource-niche of PSCCH and bypass data channel (PSSCH, Physical Sidelink Shared CHannel) is sent in cycle Put., can be to avoid the conflict of resource between different UE by the centralized Control of eNB in Mode 1.

The UE of D2D broadcast communications is sent by Mode 2 can be located in the coverage of cellular network or position UE outside cellular network coverage.The former by receive eNB system broadcasts signaling obtain Mode 2 PSCCH resource pools and Corresponding PSSCH resource pools configuration, wherein PSSCH resource pools include the subframe position sent in the corresponding PSCCH cycles for PSSCH Put, and the Physical Resource Block position sent in each subframe for PSSCH, in each PSCCH cycles, randomly choose PSCCH With the transmission resource of corresponding PSSCH.The latter determines the PSCCH resource pools of Mode 2 and corresponding PSSCH by preconfigured information Resource pool configures, and resource selection mode is identical with the former.In typical D2D communication environments, D2D communications transmission UE in each cell Quantity be 3, so, during 3GPP standard formulations not to random sources selection may caused by resource collision and band The problems such as interior interference (IBE, In-band Emission), optimizes.

Because the D2D of 3GPP Rel-12 Plays communicates mainly for low speed UE, and to time delay sensitivity and reception The relatively low business of reliability requirement, so the D2D functions of having realized are also far from meeting user demand, it is each in subsequent 3GPP In version, the functional framework for further enhancing D2D has been the extensive of current each communication UE manufacturer and communication network device manufacturer Common recognition.Wherein, based on current D2D broadcast communication mechanisms, support between high-speed equipment, between high-speed equipment and low-speed device, The communication of direct low time delay high reliability between high-speed equipment and static equipment, i.e. V2X (Vehicle to Vehicle/ Perdestrian/Infrastructure/Network), it is to need one of function of priority criteria.

Compared with existing D2D communications, one of V2X communication main features are exactly the transmission UE density of higher.For example, in urban district Under traffic congestion environment (average speed 15km/h), the quantity of car can reach 2400 in every sq-km.According to ETSI (Europe Continent telecommunication standard association, European Telecommunication Standards Institute) as defined in V2X communication industries Business model, above-mentioned vehicle can generate a V2X data packet every about 1 second, and under normal circumstances, which needs after generation Sent out in 100ms, it is seen that the density of the transmission UE of V2X is far longer than D2D.According to the conclusion of current 3GPP, V2X communicates edge With 2 patterns of Mode defined in D2D, that is, send UE independently can select resource in a certain resource pool, however, it is close to send UE Increasing considerably for degree causes V2X communications to continue to use the random sources selection mode in 2 patterns of Mode of D2D, otherwise thus Caused resource collision and IBE interference will seriously affect the performance of V2X communications.For this problem, 3GPP communicates with V2X is intended to Middle introducing Channel Detection mechanism, i.e. the interference level that V2X UE will be detected in candidate resource, when primary resource selects, selection is dry Disturb the horizontal resource for meeting corresponding conditions.

According to the conclusion of current 3GPP, V2X UE should carry out Channel Detection in the resource pool currently selected, if V2X UE carries out resource selection in subframe n, then after the UE is according to the channel detection result prediction n in [n-a, n-b] time range Idling-resource, wherein a-b should be not less than 1s, and to obtain sufficiently exact resource occupation information, this requires V2X UE to be held Continuous Channel Detection.However, there is also the UE that some electricity cruising abilities are limited in V2X communication environments, such as (people arrives in P2V Car communicates, Pedestrian to Vehicle) in, the UE types for sending data are pedestrian's handheld terminal, different with car, this The UE of type cannot bear the electric quantity consumption caused by long-time Channel Detection.The UE that this kind of electricity is limited is referred to as P- below UE.In order to reduce the power attenuation of P-UE, 3GPP is determined, P-UE can select resource by two spike-type cultivars selection mode, i.e., with Machine resource selection sends the mode (RM) of resource and selects to send out according to the result of incomplete Channel Detection (Partial Sensing) Send the mode (PS) of resource.Wherein, the UE for performing incomplete Channel Detection should be often other in Y subframe of detection in X subframe The signal that terminal is sent, wherein Y≤X, such as X=100, Y=10.However, at present still without clear and definite P-UE resource selections When method, i.e. P-UE should use any resource selection mode.

Analyzed more than passing through, it can be seen that, it is necessary to a kind of clearly P-UE resource selection methods under P2V communication scenes, and Still disclosed at present without such method.

The content of the invention

The purpose of the application is intended at least solve one of above-mentioned technological deficiency, in particular, provides in a kind of V2X communications Resource selection method and equipment, including：

User equipment (UE) determines one or more configurations for sending resource pool of work at present carrier wave；

UE one resource pool of selection from said one or multiple transmission resource pools, which is used as, sends resource pool；

UE selects transmission resource concurrence to send physical signal in transmission resource pool according to corresponding resource selection mode.

Preferably, the configurations for one or more transmission resource pools that UE passes through pre-configured definite work at present carrier wave, or

UE receives the configuration signal that eNB is sent, and one or more on work at present carrier wave is obtained according to the configuration signal A resource pool configuration information.

Preferably, the transmission resource pool configuration of work at present carrier wave includes one or more in following information：Resource pool Sub-frame set, the physical resource set of blocks of resource pool, resource pool allow resource selection mode.

Preferably, if the resource selection mode that resource pool allows is random RM resource selections mode, resource pool configuration Information includes the channel occupancy ratio thresholding that resource pool allows the semi-static data priority for taking resource and resource pool to allow；Such as The resource selection mode that fruit resource pool allows is the PS resource selection modes based on incomplete Channel Detection, then resource pool matches somebody with somebody confidence It can include the priority that resource pool allows the data of transmission in breath.

Preferably, if there are multiple optional resource pools on work at present carrier wave, and wherein both there is the random money of permission The RM resource pools of source selection, and there is the PS resource pools for not allowing RM to select, then when UE does not perform channel in PS resource pools During detection, alternatively, when UE performs Channel Detection in PS resource pools, but according to specific resource selection condition, PS resources When there is currently no available resources in pond, UE selection RM resource pools are as transmission resource pool.

Preferably, if UE selects RM resource pools, to send resource pool, UE passes through RM resource selections in RM resource pools Mode selects resource, and UE physical layers when meeting any one or more following conditions since subframe p or from subframe p+1 Start to perform incomplete Channel Detection：

The incomplete Channel Detection instruction of UE high levels is received in subframe p；

Receive the instruction of eNB；

The configuration information of PS resource pools includes the priority that resource pool allows the data of transmission, and the UE numbers to be sent According to priority of the packet priority higher than the data that the resource pool allows to send.

Preferably, for performing the UE of incomplete Channel Detection in PS resource pools, if the UE performs resource in subframe n Gravity treatment, and there is the resource for meeting available resources condition in resource selection window [n+T1, n+T2], then UE selections perform incomplete For the PS resource pools of Channel Detection to send resource pool, wherein T1 and T2 are positive integer.

Preferably, in current channel occupancy ratio CBR values R_nAllow more than the resource pool in resource pool configuration information During CBR thresholdings, the high-rise instruction UE physical layers of UE perform incomplete Channel Detection；Alternatively, in current CBR values R_nMore than resource pool During the CRB thresholdings that the resource pool in configuration information allows, UE high levels generate a random number at random between [0,1], if raw Into random number be more than the first thresholding, it indicates that UE physical layers perform incomplete Channel Detection, if less than first thresholding, Then UE high levels are by R_nZero setting；

Alternatively, the high-rise instructions of UE are given the correct time on continuous N number of UE physical layer events are received, instruction UE physical layers perform endless All channel detects, the random generation one between [0,1] alternatively, UE high levels give the correct time on continuous N number of UE physical layer events are received A random number, if the random number of generation is more than the second thresholding, it indicates that UE physical layers perform incomplete Channel Detection, if small In second thresholding, then the physical layer being currently received is reported counting zero setting by UE high levels.

Preferably, the CRB measurement results in each cycle are reported high level by UE physical layers, and UE high levels report physical layer CBR results carry out smothing filtering, obtain current CBR values；

Alternatively, UE physical layers are when the CBR values of measurement are higher than three thresholdings, by CBR values higher than the 3rd thresholding this event Report high level；

Preferably, if UE currently selects resource in PS resource pools by PS resource selection modes, and subframe p meet with Next or multiple conditions, then UE physical layers incomplete Channel Detection since subframe p：

Condition 1:t+(COUNTER+1)*SAI-p<=W, wherein COUNTER are the value in subframe p resource gravity treatment counters, T is the subframe that the value of the last resource gravity treatment counter changes, and SAI is to be indicated in the last PSCCH sent of UE Resource reservation interval, W is incomplete Channel Detection window size；

Condition 2:Subframe p is first subframe for meeting condition 1 after the last resource gravity treatment counter initialization；

Condition 3:Random numbers of the UE between [0,1] that subframe p is generated is more than the 4th thresholding.

Preferably, UE carries out resource selection using single RM resource selections mode；

Alternatively, UE uses the RM resource selection modes with resource reservation.

Preferably, if UE performs resource selection in subframe n, and UE carries out resource using single RM resource selections mode Selection, then UE is randomly selected for PSCCH the and PSSCH resources of current data packet new biography in the range of subframe [n+T1, n+T2], If data packet allows to retransmit, the PSCCH and PSSCH of data packet retransmission are randomly choosed in the range of [n+T1, n+T2] at random Resource, wherein T1 and T2 are positive integer；If UE uses the RM resource selection modes with resource reservation, UE should be in subframe [n+ T1, n+T2] in the range of frequency resource in some random subframe be used for PSCCH and PSSCH that current data packet is just passed and retransmitted Send, and be used for PSCCH and the PSSCH transmission of new data packets with frequency resource identical in specific C subframe of Period Reservation, Wherein the value of C is determined at random within the specific limits by UE.

Preferably, if the data for sending the semi-static occupancy resource of permission of the priority higher than resource pool configuration of data are excellent First level, then UE uses the RM resource selection modes with resource reservation, conversely, UE uses single RM resource selection modes.

A kind of resource selection equipment in V2X communications, it is characterised in that including：

Resource pool configures determining module, sends resource pool selecting module and sends resource selection and signal transmitting module；

Resource pool configures determining module, for determining the resource pool configuration information on work at present carrier wave；

Resource pool selecting module is sent, for being sent according to current optional resource pool state and Channel Detection condition selecting Resource pool；

Resource selection and signal transmitting module are sent, for selecting transmission resource concurrence to send physics to believe in transmission resource pool Number.

The technical solution that the application proposes, UE determine work at present carrier wave according to the instruction of pre-configured or eNB signalings first One or more sends the configuration of resource pool, and then, UE sends resource according to the state and Channel Detection condition selecting of resource pool Pond, last UE select transmission resource concurrence to send physical signal in transmission resource pool according to corresponding resource selection mode.Pass through The method that the application proposes, when the resource pool for allowing random sources to select loads relatively low, UE can select the resource pool conduct Send resource pool and select resource by the way of random sources selection, to reduce the power attenuation of UE.And work as above-mentioned resource pool When load is higher, another resource pool can be chosen as transmission resource pool by supporting the UE of incomplete Channel Detection, so that The loading level of the resource pool can be reduced.This method can take into account the power attenuation of UE and the load control of resource pool, energy Enough effectively improve the overall performance of system.

Brief description of the drawings

Fig. 1 carries technical solution implementation steps flow chart by the application；

Fig. 2 is that a kind of possible UE that the application proposes measures the schematic diagram of RM resource pools CBR；

Fig. 3 is that the UE that the application proposes sends resource selection method schematic diagram；

Fig. 4 is the resource selection device structure block diagram that the application proposes.

Embodiment

For the object, technical solution and advantage of the application are more clearly understood, develop simultaneously embodiment referring to the drawings, right The application is described in further detail.

In V2X communications, if the UE for sending data is P-UE, due to the limitation of UE battery backup capabilities, it is impossible to bear Prolonged Channel Detection, so the mechanism for selecting to send resource based on 1s Channel Detections that 3GPP is defined at present is not particularly suited for P-UE.For this reason, 3GPP is the P- for being operated under primary resource selection mode (Mode 4 defined in i.e. current 3GPP standards) UE defines the mode (PS) that random selection sends the mode (RM) of resource and resource is selected according to incomplete channel detection result, To reduce the power attenuation of P-UE.However, P-UE should how utilization effective and reasonable in practical operation both send money The selection mode in source, at present still without clear and definite solution.A kind of for this reason, resource choosing in communicating present applicant proposes V2X Selection method, hereinafter, except specified otherwise, the UE refers both to the P-UE being operated under primary resource selection mode or with being operated in Under primary resource selection mode P-UE there are same or similar resource selection demand terminal, as shown in Figure 1, including following step Suddenly：

Step 110：UE determines one or more configurations for sending resource pool of work at present carrier wave.

In this application, one or more configurations for sending resource pool of work at present carrier wave include one in following information Item is multinomial：The sub-frame set of resource pool, Physical Resource Block (PRB, the Physical Resource Block) collection of resource pool Close, and the resource selection mode that resource pool allows, etc..If the resource selection mode that resource pool allows is RM, resource pool is matched somebody with somebody Confidence breath, which may further include resource pool, allows the semi-static data priority for taking resource, the channel occupancy that resource pool allows Ratio (CBR, Channel Busy Ratio) thresholding etc..If the resource selection mode that resource pool allows is PS, resource pool May further include resource pool in configuration information allows priority of data of transmission etc..If the resource that resource pool allows is selected Selecting mode includes RM, then UE can select transmission resource in the resource pool by way of RM, conversely, UE is in the resource pool It can only select to send resource by way of PS.Hereinafter, the resource pool for allowing RM to select is become into RM resource pools, for not permitting Perhaps the resource pool of RM selections is known as PS resource pools.In this application, RM resource pools and PS resource pools can be partially or completely overlapping.

UE can be by pre-configured, or receives the configuration signal of eNB and obtain one or more hairs on work at present carrier wave Send the configuration information of resource pool.

Step 120：UE sends one resource pool of selection in resource pool from one or more of previous step and is provided as transmission Source pond.

In this application, if there are multiple optional resource pools on work at present carrier wave, and wherein i.e. there are RM resources Pond, and there are PS resource pools, then if UE does not perform Channel Detection in PS resource pools, alternatively, UE is in PS resource pools Interior execution Channel Detection, but according to specific resource selection condition, available resources are there is currently no, then UE should select RM resources Pond.Otherwise, UE should select PS resource pools.

If work at present carrier wave only exists a kind of resource pool, UE directly performs step 130.

Step 130：UE selects transmission resource concurrence to send physics in transmission resource pool according to corresponding resource selection mode Signal.

For the ease of understanding the application, with reference to concrete application situation, with the pattern of equipment room interaction in the application State technical solution be described further it is specific as follows：

Embodiment one：

In the present embodiment, the carrier wave of UE works at present only exists RM resource pools, and UE is only carried out in RM resource pools RM resource selections.Specific method is as follows：

Step 210：UE determines one or more configurations for sending resource pool of work at present carrier wave.

In the present embodiment, the transmission resource pool configuration of work at present carrier wave includes the resource selection side of resource pool permission Formula, and include the sub-frame set of one or more resource pools in following information, resource pool Physical Resource Block collection (PRB, Physical Resource Block) set, and the semi-static data priority for taking resource of resource pool permission, etc..Wherein provide The resource selection mode that source pond allows is RM.

Step 220：UE is sent in resource pool in RM selects transmission resource concurrence to send physics to believe by RM resource selection modes Number.

According to a kind of implementation of the present embodiment, UE can carry out resource selection using single RM resource selections mode, In such a way, if UE performs resource selection in subframe n, UE should be randomly choosed in the range of subframe [n+T1, n+T2] PSCCH the and PSSCH resources just passed for current data packet, if data packet allows to retransmit, further at random in above-mentioned model Enclose PSCCH the and PSSCH resources of interior random selection data packet retransmission.UE is sent in the resource selected using this mode During PSCCH, resource occupation period region (Reservation Interval) can be arranged to zero by UE, alternatively, being set to Random value, to be randomized the cyclic redundancy check (CRC) bit of PSCCH.UE should set the Priority field (Priority) in PSCCH The priority of currently transmitted data is set to, zero is either arranged to or uses the method similar with resource occupation period region, will set Random value is set to, to be further randomized the cyclic redundancy check (CRC) bit of PSCCH.Wherein T1 and T2 is positive integer, real by UE Now select, and T1≤4,20≤T2≤100, the T2 values of UE selections must are fulfilled for the delay requirement of data packet.

According to another implementation of the application, UE can use the RM resource selection modes with resource reservation, press According to this mode, if UE meets resource reselection conditions in subframe n, UE should in the range of subframe [n+T1, n+T2] it is random certain Frequency resource in a subframe is used for PSCCH and the PSSCH transmissions that current data packet just passes, and with specific Period Reservation C In subframe identical frequency resource be used for new data packets PSCCH and PSSCH send, wherein the value of C by UE within the specific limits Random to determine, preferably, described a certain range can be [between 5,15].Specifically, if UE have selected subframe m in subframe n On frequency resource, wherein m belongs to [n+T1, n+T2], then UE further reserves subframeOn identical frequency Rate resource, wherein, i=1,2,3 ..., C, P_rsvp,iFor the prepared separation of i-th of reserved resource, realized and determined, it is necessary to say by UE Bright, the prepared separation of C reserved resource can be equal, and in this case, UE further reserves subframe m+i × P_rsvpOn Identical frequency resource, wherein, i=1,2,3 ..., C, P_rsvpTo reserve the prepared separation of resource, realized and determined by UE.Such as Fruit UE further have selected the retransmission resource of data packet in subframe n in the range of subframe [n+T1, n+T2], then UE should according to it is first Resource same way is passed, C retransmission resource is reserved with identical prepared separation.

Compare, randomly choosed using the UE of single RM resource selection modes every with the RM resource selection modes with resource reservation The transmission resource of one data packet, can be to avoid producing lasting resource collision between multiple UE.And when there are base in resource pool In the UE of Channel Detection selection resource, if using the RM resource selection modes with resource reservation, this part resource can be protected The UE of resource is not selected to disturb by Channel Detection.UE can be determined using above-mentioned any according to the priority for sending data RM resource selection modes, if for example, the priority for sending data is higher than the semi-static occupancy resource of permission obtained in step 210 Data priority, then UE use the RM resource selection modes with resource reservation, so as to preferably protect high priority number According to conversely, UE uses single RM resource selection modes, to avoid excessive persistent resources collision is produced；Alternatively, if UE is current Transmission resource pool only allow RM resource selection modes, then UE uses single RM resource selection modes, if current transmission money Source pond allows RM resource selection modes, and allows PS resource selection modes, then UE uses the RM resource selections with resource reservation Mode.

So far the present embodiment terminates, and only exists RM resource pools on the carrier wave of UE works at present in the present embodiment, and UE can be with RM resource selections mode using single RM resource selections mode or with reserved resource selects resource in RM resource pools, can The resource selection of UE is realized with relatively low complexity.

Embodiment two：

In the present embodiment, i.e. there are RM resource pools on the carrier wave of UE works at present, and there are PS resource pools, and UE is not PS resource selections are performed in RM resource pools.If UE supports PS resource selection modes, UE is in RM resource pools CBR higher than a certain Start to carry out Channel Detection in PS resource pools during certain threshold, if UE performs resource selection, the resource choosing of PS resource pools The resource for existing in window and meeting specific available resources condition is selected, then UE selects resource in PS resource pools, conversely, UE is in RM resources Resource is selected in pond.If UE does not support PS resource selection modes, UE in RM resource pools by embodiment one described in side Method performs resource selection, will not be described in great detail in the present embodiment.It should be strongly noted that in the present embodiment, RM resource pools and PS Resource pool can be overlapping completely or partially.Specific method is as follows：

Step 310：UE determines one or more configurations for sending resource pool of work at present carrier wave.

In embodiment, it is again there are PS resource pools, for RM resources there are RM resource pools on the carrier wave of UE works at present Pond, resource pool configuration information should include the sub-frame set of resource pool, the PRB set of resource pool, the resource selection that resource pool allows Mode, resource pool allow the semi-static data priority for taking resource, and whether resource pool allows to support PS resource selection modes UE is used, if so, resource pool allows the CBR thresholdings (the CBR thresholdings that hereinafter referred to as resource pool allows) that the type UE is used, Deng.The CBR thresholdings that wherein resource pool allows represent, when the CBR values of resource pool are less than the thresholding, support PS resource selection modes UE can select resource in the resource pool, conversely, the type UE in the resource pool not in selecting resource.It is special to need Illustrate, whether resource pool allows to support the UE of PS resource selection modes using can be by the CBR doors that allow resource pool Limit is arranged to negative and infinite indicates.Can be with if the resource selection mode that resource pool allows is PS, in resource pool configuration information Further comprise that resource pool allows priority of data of transmission etc..

UE can be by pre-configured, or receives the resource pool that the configuration signal of eNB is obtained on work at present carrier wave and match somebody with somebody confidence Breath.

Step 320：UE sends one resource pool of selection in resource pool from one or more of previous step and is provided as transmission Source pond.

In the present embodiment, if UE supports PS resource selection modes, UE physical layers should measure money in RM resource pools The CBR in source pond, and measurement result is reported to the high level of UE.Wherein, CBR can be defined as in particular time range, and bypass receives Ratio of the signal strength instruction (S-RSSI) shared by higher than the resource of a certain certain threshold；Wherein, UE can by pre-configured, ENB configurations or standard define the value of the definite particular time range, for example, the value of the particular time range can be determined by standard Justice is 100ms；UE can be by pre-configured, and eNB configurations or standard define the value of the definite certain threshold.

UE can be according to the CBR of specific period measurement RM resource pools, and UE can be by pre-configured, eNB configurations or standard Definition determines the value of the specific period.For example, the specific period is defined as 10s by standard.Fig. 2 gives a kind of possible The mode of UE measurement RM resource pools CBR, the time range of wherein CBR measurements is 100ms, and the measurement period of CBR is 10s.

According to a kind of implementation of the application, the CRB measurement results in each cycle are reported high level, UE by UE physical layers The CBR results that high level reports physical layer carry out smothing filtering, current CBR values are obtained, for example, current CBR values R_nCan be with For R_n=(1- α) × R_n-1+α×r_n, wherein R_n-1Represent that last physical layer reports corresponding CBR values, r_nRepresent current UE thing The CBR values that reason layer reports, α represent smothing filtering coefficient, and UE can be by pre-configured, and eNB configurations or standard define definite α's Value.

According to aforesaid way, UE high levels can be in R_nThe CBR thresholdings allowed more than the resource pool in resource pool configuration information When, directly indicate that UE physical layers perform incomplete Channel Detection.Alternatively, UE high levels can be in R_nDuring more than above-mentioned thresholding [0, 1] between at random generation one random number, if generation random number be more than a certain certain threshold (UE can by pre-configured, ENB is configured or standard defines the value for determining the certain threshold), it indicates that UE physical layers perform incomplete Channel Detection, if small In the certain threshold, then UE high levels are by R_nZero setting.The CBR thresholdings that the resource pool allows can send the priority of data with UE Related, i.e., the height of threshold value can send the priority inverse correlation (the more high then thresholding of priority is lower) of data with UE, and The threshold value can be born infinite including positive infinite sum.Specified otherwise is needed, if threshold value is just infinite, UE can be with CBR measurements are not performed；If threshold value is negative infinite, if UE supports PS resource selection modes, UE is provided not in the RM Selection sends resource in the pond of source.

According to another implementation of the application, UE physical layers when the CBR values of measurement are higher than a certain certain threshold, This reporting events are high-rise.UE can be by pre-configured, and eNB configurations or standard define the value of the definite certain threshold.Root According to this mode, the high-rise instructions of UE can give the correct time the execution of instruction UE physical layers not on continuous N number of UE physical layer events are received Complete channel detects.Alternatively, UE high levels can give the correct time between [0,1] at random on continuous N number of UE physical layer events are received A random number is generated, (UE can be by pre-configured, eNB configurations or mark if the random number of generation is more than a certain certain threshold Certainly justice determines the value of the certain threshold), it indicates that UE physical layers perform incomplete Channel Detection, if less than the particular door Limit, then the physical layer being currently received is reported counting zero setting by UE high levels.UE can be by pre-configured, and eNB configurations or standard are determined The value of the definite N of justice, moreover, the thresholding that the value of N can send data with UE is related, for example, the value of N can send data with UE Priority inverse correlation (the more high then N of priority is smaller), and the value of N can include positive infinite sum 0.Specified otherwise is needed, If threshold value is just infinite, UE can not perform CBR measurements；If threshold value is 0, if UE supports PS resource selection sides Formula, then UE is not in selection transmission resource in the RM resource pools.

If UE currently selects resource in RM resource pools by RM resource selection modes, UE physical layers are below meeting Incomplete Channel Detection can be performed during one or more conditions in PS resource pools since subframe p or since subframe p+1：

The incomplete Channel Detection instruction of UE high levels is received in subframe p；Alternatively,

Receive the instruction of eNB；Alternatively,

The configuration information of PS resource pools includes the priority that resource pool allows the data of transmission, and the UE numbers to be sent It is higher than above-mentioned priority according to packet priority.

If UE currently selects resource in PS resource pools by PS resource selection modes, if subframe p meets with next A or multiple conditions, then UE physical layers can since subframe p incomplete Channel Detection：

Condition 1:t+(COUNTER+1)*SAI-p<=W, wherein COUNTER are in subframe p resource gravity treatment counters (SL_ RESOURCE_RESELECTION_COUNTER value), t are the son that the value of the last resource gravity treatment counter changes Frame, SAI are UE is the last or UE is indicated in the PSCCH that subframe t is sent resource reservation interval (i.e. the last time or in son The value of resource reservation spacer domain is multiplied by basic prepared separation P in the PSCCH that frame t is sent_step) in, W is incomplete Channel Detection window Mouthful size, UE can be by pre-configured, and eNB configurations or standard define the value of definite W, such as W=1001；

Condition 3:Random numbers of the UE between [0,1] that subframe p is generated is more than a certain certain threshold, and UE can be by prewired Put, eNB configurations or standard define the value for determining the thresholding.

UE for performing incomplete Channel Detection, if the UE performs resource gravity treatment in subframe n, if in resource selection There is the resource for meeting specific available resources condition in window [n+T1, n+T2], then UE selections perform the PS of incomplete Channel Detection Resource pool is sends resource pool, conversely, UE selects RM resource pools to send resource pool.Wherein, the specific available resources condition It can be defined by standard, if for example, resource is located at subframe j, wherein j belongs to [n+T1, n+T2], and UE at least have detected subframe j- M, wherein M include 100,200,300,400,500,600,700,800,900 and 1000, and are somebody's turn to do according to what testing result was estimated The interference from other terminals in resource is sufficiently low.

Step 330：UE selects transmission resource concurrence to send physics in transmission resource pool according to corresponding resource selection mode Signal.

If the transmission resource pool of UE selections is RM resource pools, UE selects the mode and reality of resource sending in resource pool It is identical to apply example one.If the transmission resource pool of UE selections is PS resource pools, UE expiring in resource selection window [n+T1, n+T2] The transmission resource of PSCCH and PSSCH is randomly choosed in the resource of the specific available resources condition of foot.

Specified otherwise is needed, selection sends resource if UE is based on incomplete Channel Detection, and UE can be in resource Resource gravity treatment is directly performed after gravity treatment counter clear, i.e. UE is skipped defined in current standard after resource gravity treatment counter clear [0,1] at random generate random number (the parameter probResourceKeep defined in i.e. current standard) and with certain threshold ratio Compared with operation, directly perform resource gravity treatment.

So far, the present embodiment terminates.In the present embodiment, when the Congestion Level SPCC of RM resource pools is relatively low, UE can be provided in RM Selection selects to send resource by RM resource selection modes in the pond of source, to reduce the energy loss of UE.When RM resource pool congestions When, support the UE of incomplete Channel Detection to be unloaded to according to certain probability in PS resource pools, so as to advantageously reduce RM resources Congestion condition in pond.

Embodiment three：

In the present embodiment, not only there are RM resource pools on the carrier wave of UE works at present, but also there are PS resource pools, and UE is not PS resource selections are performed in RM resource pools.If UE performs incomplete Channel Detection in PS resource pools, UE is in RM resources When pond CBR is less than a certain certain threshold certain amplitude, then UE stops incomplete Channel Detection, and money is selected in RM resource pools Source.If UE does not support PS resource selection modes, UE performs resource in RM resource pools by the method described in embodiment one Select, will not be described in great detail in the present embodiment.It should be strongly noted that in the present embodiment, RM resource pools and PS resource pools can be with It is overlapping completely or partially.Specific method is as follows：

Step 410：UE determines one or more configurations for sending resource pool of work at present carrier wave.

In embodiment, it is again there are PS resource pools, for RM resources there are RM resource pools on the carrier wave of UE works at present Pond, resource pool configuration information should include the sub-frame set of resource pool, the PRB set of resource pool, the resource selection that resource pool allows Mode, resource pool allow the semi-static data priority for taking resource, and whether resource pool allows to support PS resource selection modes UE is used, if so, resource pool allows the CBR thresholdings (the CBR thresholdings that hereinafter referred to as resource pool allows) that the type UE is used, Deng.Need specified otherwise, whether resource pool allows to support that the UE uses of PS resource selection modes can be by by resource pool The CBR thresholdings of permission are arranged to negative and infinite indicate.If the resource selection mode that resource pool allows is PS, resource pool configuration May further include resource pool in information allows priority of data of transmission etc..

Step 420：UE sends one resource pool of selection in resource pool from one or more of previous step and is provided as transmission Source pond.

According to aforesaid way, UE high levels can be in R_nThe CBR thresholdings one allowed less than resource pool in resource pool configuration information During tentering degree (UE can be by pre-configured, and eNB configurations or standard define the value for determining the amplitude), directly indicate that UE physical layers are stopped Only perform incomplete Channel Detection.Alternatively, UE high levels can be in R_nThe random generation one between [0,1] during no more than above-mentioned thresholding A random number, if the random number of generation is more than a certain certain threshold, (UE can be by pre-configured, eNB configurations or standard definition Determine the value of the certain threshold), it indicates that UE physical layers stop performing incomplete Channel Detection, if less than the certain threshold, Then UE high levels are by R_nZero setting.The priority that the CBR thresholdings that the resource pool allows can send data with UE is related, i.e. threshold value Height the priority positive correlation (the more high then thresholding of priority is higher) of data can be sent with UE, and the threshold value can be with Born including positive infinite sum infinite.Specified otherwise is needed, if threshold value is negative infinite, UE can not perform CBR measurements； If threshold value is just infinite, if UE supports PS resource selection modes, UE is sent not in selection in the RM resource pools Resource.

According to another implementation of the application, UE physical layers when the CBR values of measurement are less than a certain certain threshold, This reporting events are high-rise.UE can be by pre-configured, and eNB configurations or standard define the value of the definite certain threshold.Root According to this mode, the high-rise instructions of UE can give the correct time on continuous N number of UE physical layer events are received indicates that UE physical layers stop holding The incomplete Channel Detection of row.Alternatively, UE high levels can give the correct time between [0,1] on continuous N number of UE physical layer events are received One random number of generation at random, if the random number of generation is more than a certain certain threshold, (UE can be by pre-configured, eNB configurations Or standard defines the value for determining the certain threshold), it indicates that UE physical layers perform incomplete Channel Detection, specific if less than this Thresholding, then UE high levels the physical layer being currently received is reported into counting zero setting.UE can be by pre-configured, eNB configurations or standard Definition determines the value of N, moreover, the thresholding that the value of N can send data with UE is related, for example, the value of N can send data with UE Priority positive correlation (the more high then N of priority is bigger), and the value of N can include positive infinite sum 0.Need specified otherwise It is, if threshold value can not perform CBR measurements for 0, UE；If threshold value is just infinite, if UE supports the choosing of PS resources Mode is selected, then UE sends resource not in selection in the RM resource pools.

If UE currently selects resource in PS resource pools by PS resource selection modes, or is performed in PS resource pools Incomplete Channel Detection, and receive the stopping incomplete Channel Detection instruction of UE high levels in subframe r, then UE physical layers can be from Subframe r starts or stops performing incomplete Channel Detection since subframe r+1.

If the UE performs resource gravity treatment in subframe n, and indicates according to high level, UE should currently stop performing incomplete letter Road detects, then UE selects RM resource pools as transmission resource pool.

Step 430：UE selects transmission resource concurrence to send physics in transmission resource pool according to corresponding resource selection mode Signal.

UE selects the mode of resource and embodiment one identical in transmission resource pool.

According to the embodiment of the present application one, the method for embodiment two and the offer of embodiment three, resource selection mode such as Fig. 3 of UE It is shown.

So far, the present embodiment terminates.In the present embodiment, selection transmission resource or the endless all channel of execution in PS resource pools The UE of detection can reuse RM resource pools as hair after the reduction of the Congestion Level SPCC of RM resource pools according to certain probability Resource pool is sent, to reduce the energy loss of UE.

Example IV：

In the present embodiment, UE supports PS resource selection modes, and UE carries out channel according to ad hoc rules in PS resource pools Detection, and resource selection is carried out in PS resource pools according to testing result.Specific method is as follows：

Step 510：UE determines one or more configurations for sending resource pool of work at present carrier wave.

In embodiment, UE should at least determine the configuration of PS resource pools, and the configuration information of PS resource pools should include at least money The sub-frame set in source pond, the PRB set of resource pool.

Step 520：UE sends one resource pool of selection in resource pool from one or more of previous step and is provided as transmission Source pond.

In the present embodiment, if UE currently selects resource in RM resource pools by RM resource selection modes, and in son Frame p receives the incomplete Channel Detection instruction of UE high levels, or receives the instruction of eNB, alternatively, PS resource pools match somebody with somebody confidence Breath includes the priority that resource pool allows the data of transmission, and the UE packet priorities to be sent are preferential higher than above-mentioned Level, then UE physical layers can perform incomplete Channel Detection since subframe p or since subframe p+1 in PS resource pools.

Condition 1:t+(COUNTER+1)*SAI-100-p<=W, wherein COUNTER are in subframe t resource gravity treatment counters (SL_RESOURCE_RESELECTION_COUNTER) value, t are that the value of the last resource gravity treatment counter changes Subframe, SAI be UE is the last or UE is indicated in the PSCCH that subframe t is sent resource reservation interval (i.e. the last time or The value of resource reservation spacer domain is multiplied by basic prepared separation P in the PSCCH that subframe t is sent_step) in, W is incomplete Channel Detection Window size, UE can be by pre-configured, and eNB configurations or standard define the value of definite W, such as W=1001, or match somebody with somebody for eNB The maximum resource that Current resource pond put or pre-configured allows takes the cycle；

UE for performing incomplete Channel Detection, preferably, it should since subframe p, every detecting y in x subframe The signal that other terminals are sent in a subframe, wherein y≤x, such as X=100, Y=10.Preferably, it is assumed that the UE is held in subframe n Row resource gravity treatment, if there is the resource for meeting specific available resources condition in resource selection window [n+T1, n+T2], then UE is selected The PS resource pools for performing incomplete Channel Detection are selected to send resource pool, conversely, UE can select RM resource pools to send resource Pond.Wherein, the specific available resources condition can be defined by standard, if for example, resource is located at subframe j, wherein j belongs to [n + T1, n+T2], UE at least have detected subframe j-M, and wherein M includes 100,200,300,400,500,600,700,800,900 Hes 1000, and according to testing result estimate the resource on the interference from other terminals it is sufficiently low.

Step 530：UE selects transmission resource concurrence to send physics in transmission resource pool according to corresponding resource selection mode Signal.

So far, the present embodiment terminates.Method through this embodiment, can reduce UE resource selections complexity as far as possible Degree, and reduce the power attenuation of UE Channel Detections.

Embodiment five：

In the present embodiment, UE supports PS resource selection modes, and UE carries out channel according to ad hoc rules in PS resource pools Detection, and the number of subframes of UE progress Channel Detections cannot be less than a certain particular value, finally according to testing result in PS resources Resource selection is carried out in pond.Specific method is as follows：

Step 610：UE determines one or more configurations for sending resource pool of work at present carrier wave.

Step 620：UE sends one resource pool of selection in resource pool from one or more of previous step and is provided as transmission Source pond.

In the present embodiment, if UE currently selects resource in RM resource pools by RM resource selection modes, and in son Frame p receives the incomplete Channel Detection instruction of UE high levels, or receives the instruction of eNB, alternatively, PS resource pools match somebody with somebody confidence Breath includes the priority that resource pool allows the data of transmission, and the UE packet priorities to be sent are preferential higher than above-mentioned Level, then UE physical layers can perform incomplete Channel Detection since subframe p or since subframe p+1 in PS resource pools.Such as The high-rise instruction UE physical layers of fruit UE perform incomplete Channel Detection in PS resource pools, then UE high levels can further indicate that execution The data packet generation cycle assumed during incomplete Channel Detection.

If UE currently selects resource in PS resource pools by PS resource selection modes, if subframe q meets with next A or multiple conditions, then UE physical layers can be in subframe q execution Channel Detections：

Condition 1:Subframe q+k belongs to set [T+M1, T+M2].Wherein, the selection of M1 and M2 is realized by UE and determined, however, Number of sub frames in set [t+ (COUNTER+1) * SAI+M1, t+ (COUNTER+1) * SAI+M2] should be not less than Y, and UE passes through eNB Configuration or pre-configured acquisition Y value；K belongs to set K, UE by receiving eNB configurations or by pre-configured definite set K Element, the element in K can be used to indicate that the resource reservation cycle supported in Current resource pond；According to a kind of T of the application Determination mode one, T are determined that wherein T=t+ (COUNTER+1) * SAI+M1, COUNTER are the resource in subframe t by UE physical layers The value of gravity treatment counter (SL_RESOURCE_RESELECTION_COUNTER), t are the arrival subframe of a nearest data packet, Be either the subframe that changes of value of the last resource gravity treatment counter or be the last execution resource gravity treatment son Frame, or be subframe p or p+1；SAI is that the resource reservation interval indicated in the last PSCCH sent of UE is (i.e. the last Or the value of resource reservation spacer domain is multiplied by basic prepared separation P in the PSCCH that subframe t is sent_step), or refer to for UE high levels The data packet generation cycle assumed during the incomplete Channel Detection of execution shown.According to the determination mode two of the T of the application, T serves as reasons The MAC layer of UE determines, and preferably, the value of T is indicated UE physical layers before T-1000.The MAC layer of UE determines that the mode of T can With identical with the determination mode one of T, or realized and determined by UE.

Condition 2:Between [0,1] that UE physical layers or UE MAC layers sometime generate after last time resource gravity treatment with Machine number is more than a certain certain threshold, and UE can be by pre-configured, and eNB configurations or standard define and determine that the value of the thresholding is (i.e. current Parameter probResourceKeep defined in standard).The value of the thresholding is used to configure the resource that UE is continuing with currently selecting Probability.

Condition 3：UE does not send any signal in subframe q on the carrier wave where PS resource pools.

For the UE using PS resource selections, if the UE performs resource gravity treatment in subframe n, if subframe [n+ △, t+ (COUNTER+1) * SAI+M2] in the range of belong to set [t+ (COUNTER+1) * SAI+M1, t+ (COUNTER+1) * SAI+M2] Subframe be not less than Y, then the PS resource pools that UE selections perform incomplete Channel Detection are transmission resource pool, conversely, UE can be selected RM resource pools are selected to send resource pool.

Step 630：UE selects transmission resource concurrence to send physics in transmission resource pool according to corresponding resource selection mode Signal.

If the transmission resource pool of UE selections is RM resource pools, UE selects the mode and reality of resource sending in resource pool It is identical to apply example one.If the transmission resource pool of UE selections is PS resource pools, UE is in set [n+ △, t+ (COUNTER+1) * SAI + M2] and the intersection range of set [t+ (COUNTER+1) * SAI+M1, t+ (COUNTER+1) * SAI+M2] in meet it is specific available The transmission resource of PSCCH and PSSCH is randomly choosed in the resource of resources supplIes.The resource of the specific available resources condition of foot can So that all resources for belonging to PS resource pools in above-mentioned two set intersection, or be what is estimated according to testing result, disturb Resource that is horizontal sufficiently low or not taken by other transmission high-priority data UE.

So far, the present embodiment terminates.Compared with example IV, constrain UE to carry out the subframe of Channel Detection in the embodiment Number, so as to ensure that UE have during resource gravity treatment by the subframe fully detected as candidate's subframes.

Disclosed herein as well is a kind of V2X communicate in resource selection equipment, its form structure as shown in figure 4, including：Money Source pond configures determining module, sends resource pool selecting module and sends resource selection and signal transmitting module, wherein：

Resource pool configures determining module, for determining one or more configurations for sending resource pool on work at present carrier wave Information；

Resource pool selecting module is sent, for according to the selections such as current optional resource pool state and Channel Detection state hair Send resource pool；

Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method carries Suddenly it is that relevant hardware can be instructed to complete by program, the program can be stored in a kind of computer-readable storage medium In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.

In addition, each functional unit in each embodiment of the application can be integrated in a processing module, can also That unit is individually physically present, can also two or more units be integrated in a module.Above-mentioned integrated mould Block can both be realized in the form of hardware, can also be realized in the form of software function module.The integrated module is such as Fruit is realized in the form of software function module and as independent production marketing or in use, can also be stored in a computer In read/write memory medium.

Storage medium mentioned above can be read-only storage, disk or CD etc..

The foregoing is merely the preferred embodiment of the application, not limiting the application, all essences in the application God and any modification, equivalent substitution, improvement and etc. within principle, done, should be included within the scope of the application protection.

Claims

1. a kind of car is to the resource selection method in extraneous V2X communications, it is characterised in that including：

2. according to the method described in claim 1, it is characterized in that, the UE determines one or more hairs of work at present carrier wave Sending the configuration of resource pool includes：

The configurations for one or more transmission resource pools that UE passes through pre-configured definite work at present carrier wave, or

UE receives the configuration signal that eNB is sent, and one or more moneys on work at present carrier wave are obtained according to the configuration signal Source pond configuration information.

3. method according to claim 1 or 2, it is characterised in that the transmission resource pool configuration of work at present carrier wave includes It is one or more in following information：The sub-frame set of resource pool, the physical resource set of blocks of resource pool, the money that resource pool allows Source selection mode.

4. according to the method described in claim 3, it is characterized in that：

If the resource selection mode that resource pool allows is random RM resource selections mode, resource pool configuration information includes resource Pond allows the channel occupancy ratio thresholding that the semi-static data priority for taking resource and resource pool allow；If resource pool allows Resource selection mode be the PS resource selection modes based on incomplete Channel Detection, then resource pool configuration information includes resource Pond allows the priority of the data sent.

5. according to the method described in claim 1, it is characterized in that, the UE is selected from said one or multiple transmission resource pools A resource pool is selected as transmission resource pool, including：

If there are multiple optional resource pools on work at present carrier wave, and wherein both there is the RM for allowing random sources to select and provided Source pond, and there is the PS resource pools for not allowing RM to select, then when UE performs Channel Detection not in PS resource pools, alternatively, When UE performs Channel Detection in PS resource pools, but according to specific resource selection condition, do not deposited at present in PS resource pools In available resources, UE selection RM resource pools are as transmission resource pool.

6. according to the method described in claim 5, it is characterized in that：

If UE selects RM resource pools, to send resource pool, UE selects to provide in RM resource pools by RM resource selection modes Source, and UE physical layers perform not when meeting any one or more following conditions since subframe p or since subframe p+1 Complete channel detects：

Receive the instruction of eNB；

The configuration information of PS resource pools includes the priority that resource pool allows the data of transmission, and the UE data packets to be sent Priority of the priority higher than the data that the resource pool allows to send.

7. according to the method described in claim 5, it is characterized in that：

UE for performing incomplete Channel Detection in PS resource pools, if the UE performs resource gravity treatment in subframe n, and is providing There is the resource for meeting available resources condition in source selection window [n+T1, n+T2], then UE selections perform incomplete Channel Detection For PS resource pools to send resource pool, wherein T1 and T2 are positive integer.

8. according to the method described in claim 7, it is characterized in that：

In current channel occupancy ratio CBR values R_nMore than in resource pool configuration information resource pool allow CBR thresholdings when, UE High level instruction UE physical layers perform incomplete Channel Detection；Alternatively, in current CBR values R_nMore than in resource pool configuration information During the CRB thresholdings that resource pool allows, UE high levels generate a random number at random between [0,1], if the random number of generation is big In the first thresholding, it indicates that UE physical layers perform incomplete Channel Detection, and if less than first thresholding, then UE high levels are by R_n Zero setting；

Alternatively, the high-rise instructions of UE are given the correct time on continuous N number of UE physical layer events are received, instruction UE physical layers perform not exclusively letter Road detects, alternatively, UE high levels give the correct time on continuous N number of UE physical layer events are received between [0,1] random generation one with Machine number, if the random number of generation is more than the second thresholding, it indicates that UE physical layers perform incomplete Channel Detection, if less than institute The second thresholding is stated, then the physical layer being currently received is reported counting zero setting by UE high levels.

9. according to the method described in claim 8, it is characterized in that：

CRB measurement results in each cycle are reported high level by UE physical layers, and the CBR results that UE high levels report physical layer carry out Smothing filtering, obtains current CBR values；

Alternatively, UE physical layers are when the CBR values of measurement are higher than three thresholdings, by CBR values higher than the 3rd thresholding this reporting events It is high-rise.

10. according to the method described in claim 5, it is characterized in that：

If UE currently selects resource in PS resource pools by PS resource selection modes, and subframe p meets with next or more A condition, then UE physical layers incomplete Channel Detection since subframe p：

Condition 1:t+(COUNTER+1)*SAI-p-100<=W, wherein COUNTER are the value in subframe p resource gravity treatment counters, T is the subframe that the value of the last resource gravity treatment counter changes, and SAI is to be indicated in the last PSCCH sent of UE Resource reservation interval, W is incomplete Channel Detection window size；

11. according to the method described in claim 1, it is characterized in that, UE is being sent in resource pool according to corresponding resource selection Mode selects transmission resource concurrence to send physical signal, including：

UE carries out resource selection using single RM resource selections mode；

12. according to the method for claim 11, it is characterised in that：

If UE performs resource selection in subframe n, and UE carries out resource selection using single RM resource selections mode, then UE exists PSCCH the and PSSCH resources of current data packet new biography are randomly selected in the range of subframe [n+T1, n+T2], if data packet Allow to retransmit, then randomly choose PSCCH the and PSSCH resources of data packet retransmission, wherein T1 in the range of [n+T1, n+T2] at random It is positive integer with T2；If UE uses the RM resource selection modes with resource reservation, UE should be in subframe [n+T1, n+T2] scope Frequency resource in some interior random subframe is used for PSCCH and PSSCH that current data packet is just passed and retransmitted and sends, and with specific C subframe of Period Reservation on identical frequency resource be used for the PSCCH and PSSCH of new data packets and send, the wherein value of C is by UE It is random within the specific limits to determine.

13. according to the method for claim 11, it is characterised in that：

If the semi-static data priority for taking resource of permission of the priority higher than resource pool configuration of data is sent, or UE The resource pool currently selected had not only allowed RM resource selections but also had allowed PS resource selections, then UE is using the RM resources choosing with resource reservation Mode is selected, conversely, UE uses single RM resource selection modes.

A kind of 14. resource selection equipment in V2X communications, it is characterised in that including：

Resource pool selecting module is sent, for sending resource according to current optional resource pool state and Channel Detection condition selecting Pond；

Resource selection and signal transmitting module are sent, for selecting transmission resource concurrence to send physical signal in transmission resource pool.