CN107645774A - The confirmation method of PC5 mouth resources is dispatched in V2X networks - Google Patents
The confirmation method of PC5 mouth resources is dispatched in V2X networks Download PDFInfo
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- CN107645774A CN107645774A CN201610576984.7A CN201610576984A CN107645774A CN 107645774 A CN107645774 A CN 107645774A CN 201610576984 A CN201610576984 A CN 201610576984A CN 107645774 A CN107645774 A CN 107645774A
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- feedback information
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Abstract
The present invention provides the confirmation method that PC5 mouth resources are dispatched in a kind of V2X networks, and methods described includes：Base station eNB sends the control command of Sidelink SPS resources by PDCCH to user equipment (UE)；UE sends ACK feedback information by physical uplink control channel PUCCH after the control command is received, at the feedback moment to eNB, so that eNB is confirmed according to the ACK feedback information.The present invention can improve the reliability of Sidelink SPS resource control commands (including activation command/release command), reduce up and Sidelink interference, it can be simultaneously UE assignment period PC5 mouth resources in time, and then ensure that V2X business datums are sent in time in PC5 mouths.
Description
Technical field
The present invention relates to the confirmation method that PC5 mouth resources are dispatched in communication technical field, more particularly to a kind of V2X networks.
Background technology
V2X (Vehicle to X) is that car exchanges with the information in the external world, is the crucial skill of following intelligent transport system
Art.V2X is mainly studied and is based on, progress third generation partner program (3rd Generation Partnership Project,
Abbreviation 3GPP) communication protocol vehicle data transmission scheme.V2X communications include V2V communications (car communicates with car), V2I communication (cars
With trackside infrastructure-based communication) and V2P communicate (car communicates with pedestrian).V2X applications will improve drive safety, reduce congestion
With energy consumption of vehicles, raising traffic efficiency and car entertainment information etc..In V2X business most of business have periodic broadcast or
The feature of event triggering finite time periodically broadcast.Meanwhile for the V2X message of preiodic type, the size of its packet and
There is rule can follow for arrival interval, be more suited to semi-static resource distribution mode.
In D2D technologies, supporting the user equipment (User Equipment, abbreviation UE) of sidelink communications has scheduling point
Both resource distribution modes of resource mode are independently selected with mode and UE.For dispatching distribution mode, it is necessary to which UE enters wirelessly
Resources control (Radio Resource Control, abbreviation RRC) connection status transmits data.UE asks to send out to base station eNB
Send resource.ENB come dispatch with the resource on Sidelink to Sidelink control and data.Specifically, UE sends a tune
ENB is given in degree request (ScheduleRequest, abbreviation SR) (D-SR or Stochastic accessing), then retransmits SideLink cachings
State report (i.e. SideLink BSR).SideLink BSR, the eNB cans reported according to UE know that UE has SideLink to lead to
The data of letter will be sent, and estimate the resource needed for UE.ENB scrambles Downlink Control Information DCI 5 to dispatch by SL-RNTI
Resource.The Sidelink control resources and data resource of UE distribution are included as in DCI5.For the autonomous selection resource modes of UE,
UE independently selects resource to transmit Sidelink controls and data inside resource pool.
For dispatching distribution mode, eNB is by being carried on Physical Downlink Control Channel (Physical Downlink
Control Channel, abbreviation PDCCH) on Downlink Control Information come for sender UE distribute PC5 mouth resources, sender UE
Sidelink controls and the transmission of data are carried out in the PC5 mouth resources that eNB is its distribution.But because eNB does not receive PC5
Any information on mouth, the Downlink Control Information that UE will not also be directed to eNB transmission scheduling PC5 mouth resources are fed back, and eNB does not know simultaneously
Whether road sender UE has correctly received is distributed the Downlink Control Information of PC5 mouth resources for it.For with periodic feature
V2X business, eNB can be the PC5 mouth resources of UE assignment periods.So, if continuing to use existing D2D technologies, eNB and UE it
Between without dispatch PC5 mouth resources confirmation, can bring the wasting of resources of PC5 mouths or conflict the problem of, in some instances it may even be possible to greatly increase
Add the propagation delay time of V2X business.
The content of the invention
To solve above-mentioned technical problem, the present invention provides the confirmation method that PC5 mouth resources are dispatched in a kind of V2X networks,
Can improve the reliability of Sidelink SPS resource control commands (including activation command/release command), reduce it is up and
Sidelink is disturbed, while can be UE assignment period PC5 mouth resources in time, so guarantee V2X business datums in PC5 mouths and
When send.
The present invention provides the confirmation method that PC5 mouth resources are dispatched in a kind of V2X networks, including：
Base station eNB sends the control of Sidelink SPS resources by physical downlink control channel PDCCH to user equipment (UE)
System order；
The UE passes through physical uplink control channel PUCCH after the control command is received, at the feedback moment
ACK feedback information is sent to the eNB, so that the eNB is confirmed according to the ACK feedback information.
Alternatively, the feedback moment depends on FDD or TDD and TDD time slot proportions；
And/or
The ACK feedback information uses PUCCH format 3.
Alternatively, the control command of the Sidelink SPS resources is ordered for the activation of the Sidelink SPS resources
Order.
Alternatively, in the UE after the control command is received, controlled at the feedback moment by physical uplink link
After channel PUCCH is confirmed to eNB transmissions ACK feedback information, methods described also includes：
If the eNB determines the UE successful activations in feedback reception to the ACK feedback information, the eNB
The Sidelink SPS resources.
Alternatively, in the UE after the control command is received, controlled at the feedback moment by physical uplink link
After channel PUCCH is confirmed to eNB transmissions ACK feedback information, methods described also includes：
If the eNB at the feedback moment be not received by the ACK feedback information and the eNB by PDCCH to described
The number that UE resends the control command of Sidelink SPS resources is less than predetermined threshold value, then the eNB be the UE again
Assignment period PC5 mouths resource and return the base station eNB by physical downlink control channel PDCCH to user equipment (UE) send
The step of control command of Sidelink SPS resources, ordered with sending the control of Sidelink SPS resources to the UE again
Order.
Alternatively, in the UE after the control command is received, controlled at the feedback moment by physical uplink link
After channel PUCCH is confirmed to eNB transmissions ACK feedback information, methods described also includes：
If the eNB at the feedback moment be not received by the ACK feedback information and the eNB by PDCCH to described
The number that UE resends the control command of Sidelink SPS resources is equal to predetermined threshold value, then the eNB is released to the UE
The periodicity PC5 mouth resources of distribution.
Alternatively, the control command of the Sidelink SPS resources is ordered for the release of the Sidelink SPS resources
Order.
Alternatively, in the UE after the control command is received, controlled at the feedback moment by physical uplink link
After channel PUCCH is confirmed to eNB transmissions ACK feedback information, methods described also includes：
If the eNB determines that the UE successfully discharges in feedback reception to the ACK feedback information, the eNB
The Sidelink SPS resources, the eNB are released to the periodicity PC5 mouth resources of the UE distribution.
Alternatively, in the UE after the control command is received, controlled at the feedback moment by physical uplink link
After channel PUCCH is confirmed to eNB transmissions ACK feedback information, methods described also includes：
If the eNB at the feedback moment be not received by the ACK feedback information and the eNB by PDCCH to described
The number that UE resends the control command of Sidelink SPS resources is less than predetermined threshold value, then returns to the base station eNB and pass through
Physical downlink control channel PDCCH sends the step of control command of Sidelink SPS resources to user equipment (UE), with again
The control command of Sidelink SPS resources is sent to the UE.
Alternatively, in the UE after the control command is received, controlled at the feedback moment by physical uplink link
After channel PUCCH is confirmed to eNB transmissions ACK feedback information, methods described also includes：
If the eNB at the feedback moment be not received by the ACK feedback information and the eNB by PDCCH to described
The number that UE resends the control command of Sidelink SPS resources is equal to predetermined threshold value, then the eNB is in preset time period
The periodicity PC5 mouth resources of the UE distribution are released to afterwards.
As shown from the above technical solution, the confirmation method of PC5 mouth resources is dispatched in V2X networks of the invention, passes through base station
ENB sends the control command of Sidelink SPS resources by PDCCH to user equipment (UE), and the UE is receiving the control
After order, pass through physical uplink control channel (Physical Uplink Control Channel, letter at the feedback moment
Claim PUCCH) ACK feedback information is sent to the eNB, so that the eNB is confirmed according to the ACK feedback information, can
Improve Sidelink SPS resource control commands (including activation command/release command) reliability, reduce it is up and
Sidelink is disturbed, while can be UE assignment period PC5 mouth resources in time, so guarantee V2X business datums in PC5 mouths and
When send.
Brief description of the drawings
Fig. 1 is the flow signal for the confirmation method that PC5 mouth resources are dispatched in the V2X networks that one embodiment of the invention provides
Figure；
Fig. 2 is that the control command of the resources of Sidelink SPS described in embodiment illustrated in fig. 1 is the Sidelink SPS
The schematic flow sheet of the confirmation method of PC5 mouth resources is dispatched in V2X networks during the activation command of resource；
Fig. 3 is that the control command of the resources of Sidelink SPS described in embodiment illustrated in fig. 1 is the Sidelink SPS
The schematic flow sheet of the confirmation method of PC5 mouth resources is dispatched in V2X networks during the release command of resource.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
Only it is part of the embodiment of the present invention, rather than whole embodiments.Based on embodiments of the invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 shows that the flow for the confirmation method that PC5 mouth resources are dispatched in the V2X networks that one embodiment of the invention provides is shown
It is intended to, as shown in figure 1, the confirmation method that PC5 mouth resources are dispatched in the V2X networks of the present embodiment is as described below.
101st, base station eNB sends Sidelink SPS resources by physical downlink control channel PDCCH to user equipment (UE)
Control command.
In a particular application, the control command of the Sidelink SPS resources can be the Sidelink SPS resources
Activation command, or the release command of the Sidelink SPS resources.
102nd, the UE passes through physical uplink control channel after the control command is received at the feedback moment
PUCCH sends ACK feedback information to the eNB, so that the eNB is confirmed according to the ACK feedback information.
In a particular application, it is described feedback the moment depend on FDD (Frequency Division Duplexing,
Abbreviation FDD) or time division duplex (Time Division Duplexing, abbreviation TDD) and TDD time slot proportions.
In a particular application, the ACK feedback information can be with being that the UE distributes Sidelink resources for the eNB
DCI format be associated.
In a particular application, the transmission position of the PUCCH in the present embodiment step 102 is related to the PDCCH in step 101
Connection, such as the transmission position of the PUCCH in step 102 are associated with the CCE indexes of the PDCCH in step 101.
Further, it is contemplated that the compatibility of the feedback discharged with the data transfer on Uu mouths and SPS, i.e., these feedbacks can
It can need in synchronization to feed back to eNB with the feedbacks of above-mentioned Sidelink SPS resources controls (including activate or discharge),
Therefore, the present embodiment (including can be activated or released to carry out Sidelink SPS resources controls using the PUCCH format specified
Put) feedback.In a particular application, the ACK feedback information can use PUCCH format 3.For example, for FDD,
Sidelink SPS resource actives or the feedback of release can use PUCCH format 3；For TDD, Sidelink SPS resources swash
Living or release feedback can also use PUCCH format 3；Specifically, PUCCH format 3 can increase 1bit and be used to indicate
The feedback of Sidelink SPS resources controls (including activate or discharge).
The explanation that the present invention is carried out with PUCCH format 3.But it is also possible to use other PUCCH formats or newly-increased one kind
PUCCH format realizes Sidelink SPS feedback information.Or realize Sidelink by increasing a kind of MAC CE newly
SPS feedback information.
The confirmation method of PC5 mouth resources is dispatched in the V2X networks of the present embodiment, by base station eNB by PDCCH to user
Equipment UE sends the control command of Sidelink SPS resources, and the UE is after the control command is received, at the feedback moment
By physical uplink control channel (Physical Uplink Control Channel, abbreviation PUCCH) to the eNB
ACK feedback information is sent, so that the eNB is confirmed according to the ACK feedback information, it is possible to increase Sidelink SPS are provided
The reliability of source control command (including activation command/release command), up and Sidelink interference is reduced, while can be timely
For UE assignment period PC5 mouth resources, and then ensure that V2X business datums are sent in time in PC5 mouths.
It is the Sidelink SPS resources in the control command of the Sidelink SPS resources in a concrete application
Activation command when, after above-mentioned steps 102, methods described can also include：
If the eNB determines the UE successful activations in feedback reception to the ACK feedback information, the eNB
The Sidelink SPS resources；
If the eNB at the feedback moment be not received by the ACK feedback information and the eNB by PDCCH to described
The number that UE resends the control command of Sidelink SPS resources is less than predetermined threshold value, then the eNB be the UE again
Assignment period PC5 mouths resource and return to step 101, ordered with sending the control of Sidelink SPS resources to the UE again
Order；
If the eNB at the feedback moment be not received by the ACK feedback information and the eNB by PDCCH to described
The number that UE resends the control command of Sidelink SPS resources is equal to predetermined threshold value, then the eNB is released to the UE
The periodicity PC5 mouth resources of distribution.
It is understood that by above method the present embodiment can improve Sidelink SPS resource active orders can
By property, up and Sidelink interference is reduced, while can be UE assignment period PC5 mouth resources in time, and then ensures V2X industry
Business data are sent in time in PC5 mouths.
In another concrete application, provided in the control command of the Sidelink SPS resources for the Sidelink SPS
During the release command in source, after above-mentioned steps 102, methods described can also include：
If the eNB determines that the UE successfully discharges in feedback reception to the ACK feedback information, the eNB
The Sidelink SPS resources, the eNB are released to the periodicity PC5 mouth resources of the UE distribution；
If the eNB at the feedback moment be not received by the ACK feedback information and the eNB by PDCCH to described
The number that UE resends the control command of Sidelink SPS resources is less than predetermined threshold value, then return to step 101, with again to
The UE sends the control command of Sidelink SPS resources；
If the eNB at the feedback moment be not received by the ACK feedback information and the eNB by PDCCH to described
The number that UE resends the control command of Sidelink SPS resources is equal to predetermined threshold value, then the eNB is in preset time period
The periodicity PC5 mouth resources of the UE distribution are released to afterwards.
It is understood that by above method the present embodiment can improve Sidelink SPS resource release commands can
By property, up and Sidelink interference is reduced, while can be UE assignment period PC5 mouth resources in time, and then ensures V2X industry
Business data are sent in time in PC5 mouths.
Fig. 2 shows that the control command of the resources of Sidelink SPS described in embodiment illustrated in fig. 1 is the Sidelink
The schematic flow sheet of the confirmation method of PC5 mouth resources is dispatched in V2X networks during the activation command of SPS resources, as shown in Fig. 2
The confirmation method of PC5 mouth resources is dispatched in the V2X networks of the present embodiment, including：
201st, eNB sends the activation command of Sidelink SPS resources by PDCCH to UE.
Specifically, step 201 is to report Sidelink BSR to eNB in UE, if eNB is according to the Sidelink of the UE
BSR caching situations, when being distributed or reconfigured periodic PC5 mouths resource using the mode of semi-continuous scheduling for the UE, eNB leads to
Cross the activation command that PDCCH sends Sidelink SPS resources to UE.
202nd, the UE sends ACK by PUCCH at the feedback moment after the activation command is received to the eNB
Feedback information, so that the eNB is confirmed according to the ACK feedback information.
In a particular application, the feedback moment depends on FDD or TDD and TDD time slot proportions.
In a particular application, the ACK feedback information can use PUCCH format 3.
If the 203, the eNB is in feedback reception to the ACK feedback information, the eNB determines the UE successes
Activate the Sidelink SPS resources.
If the 204th, the eNB feedback the moment be not received by the ACK feedback information and the eNB by PDCCH to
The number that the UE resends the activation command of Sidelink SPS resources is less than predetermined threshold value, then the eNB is the UE
Periodicity PC5 mouths resource and return to step 201 are redistributed, to send the activation of Sidelink SPS resources to the UE again
Order.
Wherein, the predetermined threshold value, can be pre- according to actual conditions to send the maximum number of retransmissions of the activation command
First set.
If the 205th, the eNB feedback the moment be not received by the ACK feedback information and the eNB by PDCCH to
The number that the UE resends the activation command of Sidelink SPS resources is equal to predetermined threshold value, then the eNB is released to institute
State the periodicity PC5 mouth resources of UE distribution.
It should be noted that after step 205, until the UE reports Sidelink BSR, eNB to be received according to new again
The UE arrived Sidelink BSR caching situations, then start to distribute resource for the UE, if eNB is the UE using semi-continuous
The mode of scheduling distributes PC5 mouth resources, then performs above-mentioned steps 201-205.
The confirmation method of PC5 mouth resources is dispatched in the V2X networks of the present embodiment, it is possible to increase Sidelink SPS resources swash
The reliability of life order, up and Sidelink interference is reduced, while can be in time UE assignment period PC5 mouth resources, entered
And ensure V2X business datums and sent in time in PC5 mouths.
Fig. 3 shows that the control command of the resources of Sidelink SPS described in embodiment illustrated in fig. 1 is the Sidelink
The schematic flow sheet of the confirmation method of PC5 mouth resources is dispatched in V2X networks during the release command of SPS resources, as shown in Fig. 2
The confirmation method of PC5 mouth resources is dispatched in the V2X networks of the present embodiment, including：
301st, eNB sends the release command of Sidelink SPS resources by PDCCH to UE.
Specifically, step 301 is that eNB passes through PDCCH when eNB pre-release is that UE is assigned with periodic PC5 mouths resource
The release command of Sidelink SPS resources is sent to UE.
302nd, the UE sends ACK by PUCCH at the feedback moment after the release command is received to the eNB
Feedback information, so that the eNB is confirmed according to the ACK feedback information.
In a particular application, the feedback moment depends on FDD or TDD and TDD time slot proportions.
In a particular application, the ACK feedback information can use PUCCH format 3.
If the 303, the eNB is in feedback reception to the ACK feedback information, the eNB determines the UE successes
The Sidelink SPS resources are discharged, the eNB is released to the periodicity PC5 mouth resources of the UE distribution.
If the 304th, the eNB feedback the moment be not received by the ACK feedback information and the eNB by PDCCH to
The number that the UE resends the release command of Sidelink SPS resources is less than predetermined threshold value, then return to step 301, with weight
The release command of Sidelink SPS resources is newly sent to the UE.
Wherein, the predetermined threshold value, can be pre- according to actual conditions to send the maximum number of retransmissions of the release command
First set.
If the 305th, the eNB feedback the moment be not received by the ACK feedback information and the eNB by PDCCH to
The number that the UE resends the release command of Sidelink SPS resources is equal to predetermined threshold value, then the eNB is when default
Between the periodicity PC5 mouth resources of the UE distribution are released to after section.
It should be noted that if eNB detects that UE is no longer RRC connection status, eNB is directly released to the UE distribution
The resource of periodicity PC5 mouths, but the order of Sidelink SPS resources release need not be sent.
The confirmation method of PC5 mouth resources is dispatched in the V2X networks of the present embodiment, it is possible to increase Sidelink SPS resources are released
The reliability of order is put, reduces up and Sidelink interference, while can be in time UE assignment period PC5 mouth resources, is entered
And ensure V2X business datums and sent in time in PC5 mouths.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, execution the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme, it all should cover among the claim of the present invention and the scope of specification.
Claims (10)
1. the confirmation method of PC5 mouth resources is dispatched in a kind of V2X networks, it is characterised in that including：
The control that base station eNB sends Sidelink SPS resources by physical downlink control channel PDCCH to user equipment (UE) is ordered
Order；
The UE is after the control command is received, at the feedback moment by physical uplink control channel PUCCH to institute
State eNB and send ACK feedback information, so that the eNB is confirmed according to the ACK feedback information.
2. according to the method for claim 1, it is characterised in that the feedback moment depends on FDD or TDD and TDD time slots
Proportioning；
And/or
The ACK feedback information uses PUCCH format 3.
3. according to the method for claim 1, it is characterised in that the control command of the Sidelink SPS resources is described
The activation command of Sidelink SPS resources.
4. according to the method for claim 3, it is characterised in that in the UE after the control command is received, anti-
It is described after the feedback moment is confirmed by physical uplink control channel PUCCH to eNB transmissions ACK feedback information
Method also includes：
If the eNB is determined described in the UE successful activations in feedback reception to the ACK feedback information, the eNB
Sidelink SPS resources.
5. according to the method for claim 3, it is characterised in that in the UE after the control command is received, anti-
It is described after the feedback moment is confirmed by physical uplink control channel PUCCH to eNB transmissions ACK feedback information
Method also includes：
If the eNB is not received by the ACK feedback information at the feedback moment and the eNB is heavy to the UE by PDCCH
The number of the new control command for sending Sidelink SPS resources is less than predetermined threshold value, then the eNB is that the UE is redistributed
Periodicity PC5 mouths resource and return the base station eNB by physical downlink control channel PDCCH to user equipment (UE) send
The step of control command of Sidelink SPS resources, ordered with sending the control of Sidelink SPS resources to the UE again
Order.
6. according to the method for claim 3, it is characterised in that in the UE after the control command is received, anti-
It is described after the feedback moment is confirmed by physical uplink control channel PUCCH to eNB transmissions ACK feedback information
Method also includes：
If the eNB is not received by the ACK feedback information at the feedback moment and the eNB is heavy to the UE by PDCCH
The number of the new control command for sending Sidelink SPS resources is equal to predetermined threshold value, then the eNB is released to the UE distribution
Periodicity PC5 mouth resources.
7. according to the method for claim 1, it is characterised in that the control command of the Sidelink SPS resources is described
The release command of Sidelink SPS resources.
8. according to the method for claim 7, it is characterised in that in the UE after the control command is received, anti-
It is described after the feedback moment is confirmed by physical uplink control channel PUCCH to eNB transmissions ACK feedback information
Method also includes：
If the eNB, in feedback reception to the ACK feedback information, it is described that the eNB determines that the UE successfully discharges
Sidelink SPS resources, the eNB are released to the periodicity PC5 mouth resources of the UE distribution.
9. according to the method for claim 7, it is characterised in that in the UE after the control command is received, anti-
It is described after the feedback moment is confirmed by physical uplink control channel PUCCH to eNB transmissions ACK feedback information
Method also includes：
If the eNB is not received by the ACK feedback information at the feedback moment and the eNB is heavy to the UE by PDCCH
The number of the new control command for sending Sidelink SPS resources is less than predetermined threshold value, then returns to the base station eNB and pass through physics
Down control channel PDCCH sends the step of control command of Sidelink SPS resources to user equipment (UE), with again to institute
State the control command that UE sends Sidelink SPS resources.
10. according to the method for claim 7, it is characterised in that in the UE after the control command is received, anti-
It is described after the feedback moment is confirmed by physical uplink control channel PUCCH to eNB transmissions ACK feedback information
Method also includes：
If the eNB is not received by the ACK feedback information at the feedback moment and the eNB is heavy to the UE by PDCCH
The number of the new control command for sending Sidelink SPS resources is equal to predetermined threshold value, then the eNB is released after preset time period
Put the periodicity PC5 mouth resources for UE distribution.
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