CN105722056A - Method for configuring device-to-device communication with mode 2 - Google Patents
Method for configuring device-to-device communication with mode 2 Download PDFInfo
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- CN105722056A CN105722056A CN201410736294.4A CN201410736294A CN105722056A CN 105722056 A CN105722056 A CN 105722056A CN 201410736294 A CN201410736294 A CN 201410736294A CN 105722056 A CN105722056 A CN 105722056A
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Abstract
The invention relates to a method for configuring D2D (device-to-device) communication with a mode 2, in a first user device of a wireless communication system. The wireless communication system includes a service base station, and at least one D2D user device pair, wherein the at least one D2D user device pair includes a first user device as the transmitting party and a second user device as the receiving party. The method comprises the steps: the first user device receives the first resource pool information for D2D data transmission from the service base station; the first user device intercepts and decodes the scheduling distribution of other D2D user device pairs within the detection range so as to obtain the second resource pool information about a second resource pool; and the first user device selects the resource from the second resource pool indicated by the second resource pool information to perform D2D communication with the second user device. Besides, the invention also relates to a method for configuring D2D communication with a mode 2, in the second user device. The method for configuring device-to-device communication with a mode 2 can reduce and even avoid the interference on D2D communication so as to improve the D2D communication performance.
Description
Technical field
The present invention relates to wireless communication technology, specifically, relate to a kind of method communicated for the device-to-device (D2D) of configuration mode two in the first user equipment of wireless communication system and a kind of method communicated for the device-to-device (D2D) of configuration mode two in the second subscriber equipment of wireless communication system, wherein, first user equipment and the second subscriber equipment are respectively as the sender of at least one D2D subscriber equipment pair and recipient.
Background technology
Among the communication of the D2D (device-to-device) of pattern 2 of today, each D2D emitter selects resource on himself.If the two pairs of D2D subscriber equipmenies use the receptor of identical radio frequency resources and one pair of which close to another to transmitter, then it is possible that the problem of common-channel interference.
Current solution is that transmitting subscriber equipment can with the probability identical with frequency resource to select data frequency resource.But, select to discharge resource conflict problem with identical probability.
Summary of the invention
Therefore, according to the above-mentioned understanding to background technology and the technical problem of existence, a first aspect of the present invention proposes a kind of method communicated for the device-to-device (D2D) of configuration mode two in the first user equipment of wireless communication system, wherein, described wireless communication system includes serving BS, at least one D2D subscriber equipment pair, wherein, at least one D2D subscriber equipment described is to including the described first user equipment as sender and the second subscriber equipment as recipient, and described method includes:
B) described first user equipment receives the first resource pond information in the first resource pond transmitted for D2D data from described serving BS；
C) dispatching distribution (SchedulingAssignment) of the other D2D subscriber equipment pair of at least one among its reconnaissance range is intercepted and decoded to described first user equipment, to draw the Secondary resource pond information about Secondary resource pond；And
D) described first user equipment selects resource and described second subscriber equipment to carry out D2D communication from the Secondary resource pond indicated by the information of described Secondary resource pond.
Those skilled in the art it is understood that, the subset that Secondary resource pond is first resource pond in the present invention, that is, compared to prior art, the resource that the D2D equipment first intercepting surrounding before selecting resource to be used for D2D data communication is used by the transmitter of the present invention, in order to make the selection more optimized.Sum it up, by can reduce the interference even avoiding D2D communication suffered according to the method for the present invention, and then improve D2D communication performance.
According among one embodiment of the present of invention, described method also includes in described step (C):
-described first user equipment draws the described Secondary resource pond information about described Secondary resource pond according to the dispatching distribution of described first resource pond information and at least one other D2D subscriber equipment pair described.
By this way, transmitter can obtain them after the dispatching distribution of the transmitter or receptor of intercepting and decode surrounding and be used which resource to have been used for D2D data communication, and can be avoided when self selects, in order to reduce D2D communication and send collision or the probability of conflict.
According among one embodiment of the present of invention, described method also includes in described step (C):
-described first user equipment receives ACK message or NACK message from described second subscriber equipment；And
-described first user equipment draws the described Secondary resource pond information about described Secondary resource pond according to described first resource pond information, the dispatching distribution of at least one other D2D subscriber equipment pair described and received described ACK message or described NACK message.
By this way, except transmitter itself considers the resource that D2D equipment around uses, optimized the selection of D2D data resource communication by the feedback signal of the receptor of its correspondence further, and then reduce further conflict or the probability of collision.
According among one embodiment of the present of invention, described ACK message represents that the interference conflict situation of the D2D communication at described second subscriber equipment place is within acceptable scope.
According among one embodiment of the present of invention, described NACK message represents that the interference conflict situation of the D2D communication at described second subscriber equipment place is outside acceptable scope.
According among one embodiment of the present of invention, described first user equipment also receives the information resources pond information for dispatching distribution feedback and/or the 4th resource pool information for dispatching distribution from described serving BS.
Those skilled in the art it is to be appreciated that can specify among follow-up standard, and this information resources pond and the 4th resource pool are separate resource pool, it is also possible to is the same resource pool of multiplexing.
In addition, in order to coordinate first user equipment and optimize D2D communication further, a second aspect of the present invention proposes a kind of method communicated for the device-to-device (D2D) of configuration mode two in the second subscriber equipment of wireless communication system, wherein, described wireless communication system includes serving BS, at least one D2D subscriber equipment pair, wherein, at least one D2D subscriber equipment described is to including the first user equipment as sender and described second subscriber equipment as recipient, and described method includes:
L) described second subscriber equipment receives the Secondary resource pond information in the Secondary resource pond transmitted for D2D data from described first user equipment, wherein, described Secondary resource pond information is intercepted and decode the dispatching distribution of the other D2D subscriber equipment pair of at least one among its reconnaissance range by described first user equipment to draw the Secondary resource pond information about Secondary resource pond；
M) dispatching distribution of the other D2D subscriber equipment pair of at least one among its reconnaissance range intercepted by described second subscriber equipment, to determine interference conflict situation；And
N) described second subscriber equipment sends NACK message or ACK message according to described interference conflict situation to described first user equipment.
According among one embodiment of the present of invention, described ACK message represents that the interference conflict situation of the D2D communication at described second subscriber equipment place is within acceptable scope.
According among one embodiment of the present of invention, described NACK message represents that the interference conflict situation of the D2D communication at described second subscriber equipment place is outside acceptable scope.
According among one embodiment of the present of invention, at least one other D2D subscriber equipment described is to outside being in the reconnaissance range of described first user equipment.
Those skilled in the art it is understood that, the subset that Secondary resource pond is first resource pond in the present invention, that is, compared to prior art, the resource that the D2D equipment first intercepting surrounding before selecting resource to be used for D2D data communication is used by the transmitter of the present invention, in order to make the selection more optimized.Preferably, transmitter can obtain them after the dispatching distribution of the transmitter or receptor of intercepting and decode surrounding and be used which resource to have been used for D2D data communication, and can be avoided when self selects, in order to reduce D2D communication and send collision or the probability of conflict.It is further preferable that except transmitter itself considers the resource that D2D equipment around uses, optimized the selection of D2D data resource communication by the feedback signal of the receptor of its correspondence further, and then reduce further conflict or the probability of collision.Sum it up, by can reduce the interference even avoiding D2D communication suffered according to the method for the present invention, and then improve D2D communication performance.
Accompanying drawing explanation
Reading the following detailed description to non-limiting example by referring to accompanying drawing, the other features, objects and advantages of the present invention will become more apparent upon.
Fig. 1 illustrates a kind of exemplary application scene 100 of the method according to the present invention；And
Fig. 2 illustrates flow process Figure 200 of the method according to the present invention.
In the drawings, running through different diagrams, same or similar accompanying drawing labelling represents same or analogous device (module) or step.
Detailed description of the invention
In the specific descriptions of following preferred embodiment, reference is constituted the accompanying drawing appended by a present invention part.Appended accompanying drawing has been illustrated by way of example and has been capable of specific embodiment.The embodiment of example is not intended as the limit all embodiments according to the present invention.It is appreciated that under the premise not necessarily departing from the scope of the present invention, it is possible to use other embodiments, it is also possible to carry out structural or logicality amendment.Therefore, following specific descriptions are also nonrestrictive, and the scope of the present invention is defined by the claims appended hereto.
Fig. 1 illustrates a kind of typical application scenarios 100 of the method according to the present invention.As can be seen from the figure, using D2D subscriber equipment to Tx1 and Rx1 as the object of observation, it is only select resource to carry out D2D communication among the SA resource and D2D data transmission resources that configure at its serving BS according to traditional method, due to the reason of geographic close together, the D2D communication between Tx1 and Rx1 will necessarily be subject to the interference of other D2D subscriber equipmenies pair.Such as Tx1 can be subject to the interference of Tx2 and Tx3 about when sending.
For problem suggested above, the solution of the present invention is as shown in Figure 2, Fig. 2 illustrates the flow process Figure 200 of the method communicated according to the device-to-device (D2D) for configuration mode two in the first user equipment of wireless communication system of the present invention, wireless communication system includes serving BS, at least one D2D subscriber equipment is to Tx1-> Rx1/Tx2-> Rx2/Tx3-> Rx3 and Tx4-> Rx4, wherein, Tx1-> Rx1/Tx2-> Rx2/Tx3-> Rx3 and Tx4-> Rx4 is included first user equipment Tx1/Tx2/Tx3 and Tx4 as sender and the second subscriber equipment Rx1/Rx2/Rx3 and Rx4 as recipient by least one D2D subscriber equipment, the method according to the present invention is set forth as first user equipment and Rx1 as the second subscriber equipment below for Tx1.It is seen that first, in method step 210, first user equipment Tx1 receives the first resource pond information in the first resource pond transmitted for D2D data from its serving BS；Then, in a step 220, first user equipment Tx1 intercepts and decodes the other D2D subscriber equipment of at least one among its reconnaissance range dispatching distribution to (such as Tx2-> Rx2 and Tx3-> Rx3), to draw the Secondary resource pond information about Secondary resource pond；And in step 230, this first user equipment Tx1 selects resource and the second subscriber equipment Rx1 to carry out D2D communication from the Secondary resource pond indicated by the information of Secondary resource pond finally.
Those skilled in the art it is understood that, the subset that Secondary resource pond is first resource pond in the present invention, that is, compared to prior art, the resource that the D2D equipment first intercepting surrounding before selecting resource to be used for D2D data communication is used by the transmitter of the present invention, in order to make the selection more optimized.Sum it up, by can reduce the interference even avoiding D2D communication suffered according to the method for the present invention, and then improve D2D communication performance.
According among one embodiment of the present of invention, the method also includes in a step 220:
First user equipment Tx1 draws the Secondary resource pond information about Secondary resource pond according to the dispatching distribution of first resource pond information He at least one other D2D subscriber equipment pair.
By this way, transmitter can obtain them after the dispatching distribution of the transmitter or receptor of intercepting and decode surrounding and be used which resource to have been used for D2D data communication, and can be avoided when self selects, in order to reduce D2D communication and send collision or the probability of conflict.
According among one embodiment of the present of invention, the method also includes in a step 220:
First user equipment Tx1 receives ACK message or NACK message from the second subscriber equipment Rx1；And
The dispatching distribution of (such as Tx2-> Rx2 and Tx3-> Rx3) and received ACK message or NACK message are drawn the Secondary resource pond information about Secondary resource pond according to first resource pond information, D2D subscriber equipment that at least one is other by first user equipment Tx1.According among one embodiment of the present of invention, ACK message represents that the interference conflict situation of the D2D communication at the second subscriber equipment Rx1 place is within acceptable scope.According among one embodiment of the present of invention, NACK message represents that the interference conflict situation of the D2D communication at the second subscriber equipment place is outside acceptable scope.
By this way, except transmitter itself considers the resource that D2D equipment around uses, optimized the selection of D2D data resource communication by the feedback signal of the receptor of its correspondence further, and then reduce further conflict or the probability of collision.
According among one embodiment of the present of invention, first user equipment Tx1 also receives the information resources pond information for dispatching distribution feedback and/or the 4th resource pool information for dispatching distribution from serving BS (not shown).Those skilled in the art it is to be appreciated that can specify among follow-up standard, and this information resources pond and the 4th resource pool are separate resource pool, it is also possible to is the same resource pool of multiplexing.
In addition, in order to coordinate first user equipment and optimize D2D communication further, a second aspect of the present invention proposes a kind of method communicated for the device-to-device (D2D) of configuration mode two in the second subscriber equipment of wireless communication system, wherein, wireless communication system includes serving BS, at least one D2D subscriber equipment pair, wherein, at least one D2D subscriber equipment is to including the first user equipment as sender and the second subscriber equipment as recipient, the method includes: the second subscriber equipment Rx1 receives the Secondary resource pond information in the Secondary resource pond transmitted for D2D data from first user equipment Tx1, wherein, Secondary resource pond information is intercepted and decode the dispatching distribution of the other D2D subscriber equipment pair of at least one among its reconnaissance range by first user equipment Tx1 to draw the Secondary resource pond information about Secondary resource pond；Then, the second subscriber equipment Rx1 intercepts the dispatching distribution of the other D2D subscriber equipment pair of at least one among its reconnaissance range, to determine interference conflict situation；And the second last subscriber equipment Rx is according to disturbing conflict situation to send NACK message or ACK message to first user equipment Tx1.According among one embodiment of the present of invention, ACK message represents that the interference conflict situation of the D2D communication at the second subscriber equipment Rx1 place is within acceptable scope.According among one embodiment of the present of invention, NACK message represents that the interference conflict situation of the D2D communication at the second subscriber equipment place is outside acceptable scope.
According among one embodiment of the present of invention, at least one other D2D subscriber equipment is to outside being in the reconnaissance range of first user equipment Tx1.In the embodiment illustrated in figure 1, other D2D subscriber equipment is to outside such as Tx4-> Rx4 is then positioned at the reconnaissance range of first user equipment Tx1.
Putting it briefly, the present invention proposes a kind of scheduled feedback mechanism by means of the D2D data transmitter of scheduling and receptor of intercepting neighbouring subscriber equipment.The data that can optimize in D2D communication according to this feedback mechanism send.It will be applied to the situation of single transmission and clean culture.Alternatively, base station eNB can be pre-configured with and notify the subscriber equipment independent resource pool for dispatching distribution, SA feedback and D2D data of transmitting.In scheduling process, the dispatching distribution of other subscriber equipmenies first intercepted and decoded by D2D transmitter before selecting resource, in order to optimize the method further, D2D receptor is made same action and its resource allocation conditions in dispatching distribution is mated with other carrying out, in order to discover whether there is resource contention and send back the ACK/NACK feedback of SA.
Those skilled in the art it is understood that, the subset that Secondary resource pond is first resource pond in the present invention, that is, compared to prior art, the resource that the D2D equipment first intercepting surrounding before selecting resource to be used for D2D data communication is used by the transmitter of the present invention, in order to make the selection more optimized.Preferably, transmitter can obtain them after the dispatching distribution of the transmitter or receptor of intercepting and decode surrounding and be used which resource to have been used for D2D data communication, and can be avoided when self selects, in order to reduce D2D communication and send collision or the probability of conflict.It is further preferable that except transmitter itself considers the resource that D2D equipment around uses, optimized the selection of D2D data resource communication by the feedback signal of the receptor of its correspondence further, and then reduce further conflict or the probability of collision.Sum it up, by can reduce the interference even avoiding D2D communication suffered according to the method for the present invention, and then improve D2D communication performance.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when without departing substantially from the spirit of the present invention or basic feature, it is possible to realize the present invention in other specific forms.Therefore, in any case, embodiment all should be regarded as exemplary, and be nonrestrictive.Additionally, it will be evident that " including " word is not excluded for other elements and step, and wording " one " is not excluded for plural number.In device claim, multiple elements of statement can also be realized by an element.The first, the second word such as grade is used for representing title, and is not offered as any specific order.
Claims (10)
1. one kind is used for the method that the device-to-device (D2D) of configuration mode two communicates in the first user equipment of wireless communication system, wherein, described wireless communication system includes serving BS, at least one D2D subscriber equipment pair, wherein, at least one D2D subscriber equipment described is to including the described first user equipment as sender and the second subscriber equipment as recipient, and described method includes:
B) described first user equipment receives the first resource pond information in the first resource pond transmitted for D2D data from described serving BS；
C) dispatching distribution of the other D2D subscriber equipment pair of at least one among its reconnaissance range is intercepted and decoded to described first user equipment, to draw the Secondary resource pond information about Secondary resource pond；And
D) described first user equipment selects resource and described second subscriber equipment to carry out D2D communication from the Secondary resource pond indicated by the information of described Secondary resource pond.
2. method according to claim 1, wherein, described method also includes in described step (C):
-described first user equipment draws the described Secondary resource pond information about described Secondary resource pond according to the dispatching distribution of described first resource pond information and at least one other D2D subscriber equipment pair described.
3. method according to claim 1 and 2, wherein, described method also includes in described step (C):
-described first user equipment receives ACK message or NACK message from described second subscriber equipment；And
-described first user equipment draws the described Secondary resource pond information about described Secondary resource pond according to described first resource pond information, the dispatching distribution of at least one other D2D subscriber equipment pair described and received described ACK message or described NACK message.
4. method according to claim 3, wherein, described ACK message represents that the interference conflict situation of the D2D communication at described second subscriber equipment place is within acceptable scope.
5. method according to claim 3, wherein, described NACK message represents that the interference conflict situation of the D2D communication at described second subscriber equipment place is outside acceptable scope.
6. method according to claim 1, wherein, described first user equipment also receives the information resources pond information for dispatching distribution feedback and/or the 4th resource pool information for dispatching distribution from described serving BS.
7. one kind is used for the method that the device-to-device (D2D) of configuration mode two communicates in the second subscriber equipment of wireless communication system, wherein, described wireless communication system includes serving BS, at least one D2D subscriber equipment pair, wherein, at least one D2D subscriber equipment described is to including the first user equipment as sender and described second subscriber equipment as recipient, and described method includes:
L) described second subscriber equipment receives the Secondary resource pond information in the Secondary resource pond transmitted for D2D data from described first user equipment, wherein, described Secondary resource pond information is intercepted and decode the dispatching distribution of the other D2D subscriber equipment pair of at least one among its reconnaissance range by described first user equipment to draw the Secondary resource pond information about Secondary resource pond；
M) dispatching distribution of the other D2D subscriber equipment pair of at least one among its reconnaissance range is intercepted and decoded to described second subscriber equipment, to determine interference conflict situation；And
N) described second subscriber equipment sends NACK message or ACK message according to described interference conflict situation to described first user equipment.
8. method according to claim 7, wherein, described ACK message represents that the interference conflict situation of the D2D communication at described second subscriber equipment place is within acceptable scope.
9. method according to claim 7, wherein, described NACK message represents that the interference conflict situation of the D2D communication at described second subscriber equipment place is outside acceptable scope.
10. method according to claim 7, wherein, at least one other D2D subscriber equipment described is to outside being in the reconnaissance range of described first user equipment.
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