CN104640057A - D2D (device to device) resource allocation method and device - Google Patents
D2D (device to device) resource allocation method and device Download PDFInfo
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- CN104640057A CN104640057A CN201310557703.XA CN201310557703A CN104640057A CN 104640057 A CN104640057 A CN 104640057A CN 201310557703 A CN201310557703 A CN 201310557703A CN 104640057 A CN104640057 A CN 104640057A
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- retransmissions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
- H04W28/12—Flow control between communication endpoints using signalling between network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a D2D (device to device) resource allocation method and device and solves the problem that D2D UE (user equipment) is poor to receive D2D physical signals on the allocated D2D resources as sends the physical signals on the D2D resources. According to an embodiment, the D2D UE feeds back first information to indicate transmission quality on the current D2D resource. A first information receiver is a base or a UE responsible for scheduling and regulates a transmission subframe number of the D2D UE on the D2D resources.
Description
Technical field
The present invention relates to the scheme of device to Resourse Distribute in device (D2D-Device to Device) communication, particularly relate to the transmission plan of the Resourse Distribute based on Long Term Evolution (LTE-Long Term Evolution) D2D.
Background technology
In traditional third generation partner program (3GPP-3rd Generation Partner Project) Long Term Evolution (LTE-Long Term Evolution) system, define two kinds of frame structures, i.e. the frame structure 1 of Frequency Division Duplexing (FDD) (FDD-Frequency Division Duplex) system and the frame structure 2 of time division duplex (TDD-Time Division Duplex) system.The two difference is that each subframe of FDD frame structure is 1 millisecond (ms-millisecond); and TDD system defines 1 ~ 2 special subframe in each frame (10 subframes); special subframe is by downlink synchronization slot (DwPTS-Downlink Pilot Time Slot); protection interval (GP-Guard Period), uplink synchronous time slot (UpPTS-Uplink Pilot Time Slot) three part is formed.
In traditional 3GPP version, transfer of data occurs between base station and subscriber equipment (UE-User Equipment).In 3GPP R12, device is also discussed by project verification device (D2D-Device to Device) communication, and the essential characteristic of D2D allows the transfer of data between UE.For FDD and TDD system, the conclusion that 3GPP reaches wireless access network first working group the 73rd meeting (RAN1#73) is: the UE in D2D system does not allow to receive and dispatch simultaneously.Further, in order to avoid the interference that downlink data communicates to D2D, the sub-frame of uplink of upstream band and subframe (TDD) that UE takies traditional ascending resource and FDD is used for D2D and communicates (TDD descending sub frame needs to be discussed further).In RAN1#74bis meeting, have passed the multi-access mode of the subframe employing SC-FDMA about D2D communication, further, from the angle of the transmission of UE, D2D data and the transmission of upstream data be time division multiplexing (TDM-Time Division Multiplexing).The multiplex mode of the D2D data of multiple UE need further discussion, and possible mode comprises TDM or frequency division multiplexing (FDM-Frequency Division Multiplexing).
One in D2D communication has problem to be determined to be Resourse Distribute, and in order to reduce the signaling consumption of D2D Resourse Distribute, the method that feasible D2D receives resource comprises:
-adopt the allocative decision of similar almost blank subframe (ABS-Almost Blank Subframe), namely the multiple subframe of primary distribution receives resource as D2D.
-semi-static distribution D2D receives resource.
-distributing D2D resource pool, D2D receives UE and monitor D2D data on described D2D resource pool
No matter above-mentioned any method, D2D UE likely receives at the D2D distributed in the part subframe in resource and sends physical data, and reason comprises:
-send upstream data
-send up signaling, such as, for the response/non-response (ACK/NACK) of downlink physical shared channel (PDSCH-Physical Downlink Share Channel)
-send D2D data
Because D2D UE can not simultaneously transceiving data on ascending resource, therefore, in above-mentioned part subframe, D2D UE can not receive D2D data.And this can cause the Block Error Rate (BLER-Block Error Rate) of D2D data to increase.For the problems referred to above, the invention discloses the scheme that the auxiliary resources in a kind of D2D system distributes.
Summary of the invention
The invention discloses the method in a kind of subscriber equipment (UE), wherein, comprise the steps:
A. the first subframe collection in a D2D resource receives D2D physical signalling
B. one of below first information instruction is at least sent:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.
Described required number of retransmissions refers to that the reception BLER in a D2D resource or the first subframe collection can reach not higher than the minimum retransmission number of times required for target BLER.As an embodiment, described required number of retransmissions is determined according to described D2D physical signalling.As an embodiment, described D2D physical signalling comprises data and demodulated reference signal; As another embodiment, described D2D physical signalling comprises data, signaling, and demodulated reference signal.D2D UE feeds back the first information auxiliary resources distribution node (base station or UE) can estimate the subframe whether adjusting the first subframe collection and comprise.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps: before described steps A
A0. receive the first signaling and determine a D2D resource.
Concrete, according to an aspect of the present invention, it is characterized in that, the first information passes through one of below reception at least and obtains:
-reference signal in a D2D resource
-described D2D physical signalling
Described reference signal may be synchronizing signal, interception reference signal etc.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
C. the transmission subframe in a D2D resource sends physical signalling, and described transmission subframe does not belong to the first subframe collection.
Above-mentioned physical signalling is D2D signal or upward signal.
Concrete, according to above-mentioned aspect of the present invention, it is characterized in that, also comprise the steps: before described step C
C0. receive the second signaling to determine to send described physical signalling in described transmission subframe.
Second signaling is uplink scheduling signaling or descending scheduling signaling or D2D dispatch.
Concrete, according to above-mentioned aspect of the present invention, it is characterized in that, for each subframe in a D2D resource, if not transmission subframe, then belong to the first subframe collection.
Concrete, according to an aspect of the present invention, it is characterized in that, described target BLER is pre-determining or configurable.
The invention discloses a kind of method in UE, wherein, comprise the steps:
A. the first signaling instruction the one D2D resource is sent
B. receiving the first information determines one of at least following:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
C. send the transmission subframe of the second signaling instruction in a D2D resource and send physical signalling, described transmission subframe does not belong to the first subframe collection.
D2D UE distributes according to first information auxiliary resources, namely increases or reduce the subframe that quantity-adjust the first subframe collection of sending subframe comprises.
The invention discloses a kind of method in base station, wherein, comprise the steps:
A. the first signaling instruction the one D2D resource is sent
B. receiving the first information determines one of at least following:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
C. send the transmission subframe of the second signaling instruction in a D2D resource and send physical signalling, described transmission subframe does not belong to the first subframe collection.
The invention discloses a kind of subscriber equipment, it is characterized in that, this equipment comprises:
First module: receive the first signaling and determine a D2D resource
Second module: the first subframe collection in a D2D resource receives D2D physical signalling
3rd module: send one of below first information instruction at least:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.
The invention discloses a kind of subscriber equipment, it is characterized in that, this equipment comprises:
First module: send the first signaling instruction the one D2D resource
Second module: receive the first information and determine one of at least following:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
3rd module: send the transmission subframe of the second signaling instruction in a D2D resource and send physical signalling, described transmission subframe does not belong to the first subframe collection.
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions refers to that the BLER on the first subframe collection can reach not higher than the minimum retransmission number of times required for target BLER.
The invention discloses a kind of base station equipment, it is characterized in that, this equipment comprises:
First module: send the first signaling instruction the one D2D resource
Second module: receive the first information and determine one of at least following:
-required number of retransmissions
The relation of-required number of retransmissions and blind number of retransmissions
Whether the BLER on the-the first subframe collection is higher than target BLER
3rd module: send the transmission subframe of the second signaling instruction in a D2D resource and send physical signalling, described transmission subframe does not belong to the first subframe collection.
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.
The invention solves D2D UE to send physical signalling and can affect this problem of performance that it receives D2D physical signalling in described D2D resource in the D2D resource of distributing.For the problems referred to above, D2D UE feeds back the current transmission quality in described D2D resource of first information instruction.The recipient of the first information is base station or the UE being responsible for scheduling.Described recipient adjusts the transmission number of sub frames of described D2D UE in described D2D resource according to the first information.The present invention is applicable to D2D broadcast communication and D2D unicast communication.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows the schematic diagram of the transmission first information according to an embodiment of the invention;
Fig. 2 shows the schematic diagram utilizing the first information to carry out Resourse Distribute according to an embodiment of the invention;
Fig. 3 shows the first information dispensing device structured flowchart in subscriber equipment according to an embodiment of the invention;
Fig. 4 shows the first information receiving system structured flowchart in subscriber equipment according to an embodiment of the invention;
Fig. 5 shows the first information receiving system structured flowchart in base station equipment according to an embodiment of the invention;
Embodiment
Hereafter will be described in further detail technical scheme of the present invention by reference to the accompanying drawings, and it should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine arbitrarily mutually.
Embodiment 1
Embodiment 1 illustrates the schematic diagram sending the first information, as shown in Figure 1.In accompanying drawing 1, UE U10 and UE U11 are two UE that D2D communicates.
For UE U10, in step S101, the first subframe collection in a D2D resource receives the D2D physical signalling from UE U11; In step s 102, one of below first information instruction is at least sent:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
Wherein, first subframe collection is all or part of subframe of a D2D resource in time domain, described required number of retransmissions is nonnegative integer, described blind number of retransmissions is positive integer, (such as by signaling display configuration) that described target BLER pre-determining is fixed constant (such as 0.01) or can configures.
For UE U11, in step S111, send D2D physical signalling.
Embodiment 2
Embodiment 2 illustrates the schematic diagram utilizing the first information to carry out Resourse Distribute, as shown in Figure 2.In embodiment 2, UE U13 and UE U14 are that two UE that D2D communicates, equipment C12 dispatch communicating of U13 with U14, and equipment C12 is base station or UE.
For equipment C12, in step S121, send the first signaling instruction the one D2D resource; In step S122, receive the first information and determine one of at least following:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER;
If the first information indicates required number of retransmissions be less than blind number of retransmissions or the BLER of D2D physical signalling that receives lower than target BLER, then in step S123, send the transmission subframe of the second signaling instruction in a D2D resource according to the first information and send physical signalling, described transmission subframe does not belong to the first subframe collection.
For UE U13, in step S131, receive the first signaling and determine a D2D resource; In step S132, the first subframe collection in a D2D resource receives D2D physical signalling; In step S133, send one of below first information instruction at least:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER;
If the first information indicates required number of retransmissions be less than blind number of retransmissions or the BLER of D2D physical signalling that receives lower than target BLER, then, in step S134, receive the second signaling and determine to send physical signalling in transmission subframe; In step S135, the described transmission subframe in a D2D resource sends described physical signalling, and described transmission subframe does not belong to the first subframe collection.
For UE U14, send D2D physical signalling in step s 141.
In embodiment 2, the first subframe collection is that a D2D resource removes all subframes sent outside subframe in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.
In embodiment 2, step (S123, S134, S135) within square frame M01 is optional step, in an alternate embodiment in example 2, the first information indicates required number of retransmissions and is not less than blind number of retransmissions or the BLER of D2D physical signalling that receives higher than target BLER; Step S123, S134 and S135 do not occur.
Embodiment 3
Embodiment 3 illustrates the first information dispensing device structured flowchart in subscriber equipment, as shown in Figure 3.In accompanying drawing 3, device 300 is made up of the first receiver module 301, second receiver module the 302, three sending module 303.First receiver module 301 receives the first signaling and determines a D2D resource, and the first subframe collection of the second receiver module 302 in a D2D resource receives D2D physical signalling, and the 3rd sending module 303 sends one of below first information instruction at least:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.The first information passes through one of below reception at least and obtains:
-reference signal in a D2D resource, such as interception reference signal, synchronizing signal etc.
-described D2D physical signalling.If a D2D resource does not exist the proprietary reference signal of D2D, then the first information obtains by receiving described D2D physical signalling.
Embodiment 4
Embodiment 4 illustrates the first information dispensing device structured flowchart in subscriber equipment, as shown in Figure 4.In accompanying drawing 4, the device 400 in UE is made up of the first sending module 401, second receiver module the 402, three sending module 403.
First sending module 401 sends the first signaling instruction the one D2D resource; Second receiver module 402 receives the first information and determines one of at least following:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER;
3rd sending module 403 sends the transmission subframe of the second signaling instruction in a D2D resource and sends physical signalling, and described transmission subframe does not belong to the first subframe collection.
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions refers to that the BLER on the first subframe collection can reach not higher than the minimum retransmission number of times required for target BLER.
Embodiment 5
Embodiment 5 illustrates the first information receiving system structured flowchart in base station equipment, as shown in Figure 5.
In accompanying drawing 5, the device 500 in base station is made up of the first sending module 501, second receiver module the 502, three sending module 503.
First sending module 501 sends the first signaling instruction the one D2D resource; Second receiver module 502 receives the first information and determines one of at least following:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER;
3rd sending module 503 sends the transmission subframe of the second signaling instruction in a D2D resource and sends physical signalling, and described transmission subframe does not belong to the first subframe collection.
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions refers to that the BLER on the first subframe collection can reach not higher than the minimum retransmission number of times required for target BLER.
The all or part of step that one of ordinary skill in the art will appreciate that in said method can be carried out instruction related hardware by program and complete, and described program can be stored in computer-readable recording medium, as read-only memory, and hard disk or CD etc.Optionally, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Accordingly, each modular unit in above-described embodiment, can adopt example, in hardware to realize, and also can be realized by the form of software function module, the application is not limited to the combination of the software and hardware of any particular form.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improves, all should be included within protection scope of the present invention.
Claims (14)
1. the method in UE, wherein, comprises the steps:
A. the first subframe collection in a D2D resource receives D2D physical signalling
B. one of below first information instruction is at least sent:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.
2. method according to claim 1, is characterized in that, also comprises the steps: before described steps A
A0. receive the first signaling and determine a D2D resource.
3. method according to claim 1, is characterized in that, the first information passes through one of below reception at least and obtains:
-reference signal in a D2D resource
-described D2D physical signalling.
4. method according to claim 1, is characterized in that, also comprises the steps:
C. the transmission subframe in a D2D resource sends physical signalling, and described transmission subframe does not belong to the first subframe collection.
5. method according to claim 1, is characterized in that, described target BLER is pre-determining or configurable.
6. method according to claim 4, is characterized in that, also comprises the steps: before described step C
C0. receive the second signaling to determine to send described physical signalling in described transmission subframe.
7. method according to claim 4, is characterized in that, for each subframe in a D2D resource, if not transmission subframe, then belongs to the first subframe collection.
8. the method in UE, wherein, comprises the steps:
A. the first signaling instruction the one D2D resource is sent
B. receiving the first information determines one of at least following:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.
9. method according to claim 8, is characterized in that, also comprises the steps:
C. send the transmission subframe of the second signaling instruction in a D2D resource and send physical signalling, described transmission subframe does not belong to the first subframe collection.
10. the method in base station, wherein, comprises the steps:
A. the first signaling instruction the one D2D resource is sent
B. receiving the first information determines one of at least following:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.
11. methods according to claim 10, is characterized in that, also comprise the steps:
C. send the transmission subframe of the second signaling instruction in a D2D resource and send physical signalling, described transmission subframe does not belong to the first subframe collection.
12. 1 kinds of subscriber equipmenies, is characterized in that, this equipment comprises:
First module: receive the first signaling and determine a D2D resource
Second module: the first subframe collection in a D2D resource receives D2D physical signalling
3rd module: send one of below first information instruction at least:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.
13. 1 kinds of subscriber equipmenies, is characterized in that, this equipment comprises:
First module: send the first signaling instruction the one D2D resource
Second module: receive the first information and determine one of at least following:
-required number of retransmissions
Whether-required number of retransmissions is less than blind number of retransmissions
Whether the BLER of-described D2D physical signalling is higher than target BLER
3rd module: send the transmission subframe of the second signaling instruction in a D2D resource and send physical signalling, described transmission subframe does not belong to the first subframe collection.
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions refers to that the BLER on the first subframe collection can reach not higher than the minimum retransmission number of times required for target BLER.
14. 1 kinds of base station equipments, is characterized in that, this equipment comprises:
First module: send the first signaling instruction the one D2D resource
Second module: receive the first information and determine one of at least following:
-required number of retransmissions
The relation of-required number of retransmissions and blind number of retransmissions
Whether the BLER on the-the first subframe collection is higher than target BLER
3rd module: send the transmission subframe of the second signaling instruction in a D2D resource and send physical signalling, described transmission subframe does not belong to the first subframe collection.
Wherein, the first subframe collection is all or part of subframe of a D2D resource in time domain, and described required number of retransmissions is nonnegative integer, and described blind number of retransmissions is positive integer.
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| WO2018145296A1 (en) * | 2017-02-10 | 2018-08-16 | 华为技术有限公司 | Method for data transmission, related device, and system |
| CN110169094A (en) * | 2019-04-09 | 2019-08-23 | 北京小米移动软件有限公司 | Feedback information transmission method, device, equipment and the system of direct-connected communication |
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| CN111342939A (en) * | 2020-03-02 | 2020-06-26 | 惠州Tcl移动通信有限公司 | Data blind retransmission method and device, storage medium and terminal equipment |
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