CN104602350A - D2D interference avoidance method and device - Google Patents
D2D interference avoidance method and device Download PDFInfo
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- CN104602350A CN104602350A CN201310534394.4A CN201310534394A CN104602350A CN 104602350 A CN104602350 A CN 104602350A CN 201310534394 A CN201310534394 A CN 201310534394A CN 104602350 A CN104602350 A CN 104602350A
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Abstract
The invention solves the interference problem of over-cell D2D UE communication; in one embodiment, the scheme that a D2D transmitting UE and an uplink transmitting UE share the same time-frequency resource increases the spectral efficiency of the D2D UE communication. Furthermore, the interference of D2D physical signal to uplink signal is reduced by controlling the maximum transmitting power of the D2D transmitting UE. The D2D interference avoidance method and device are compatible to the existing 3GPP conclusion.
Description
Technical field
The present invention relates to device to the scheme transmitted of demodulated reference signal (DMRS-Demodulation Reference Signal) in device (D2D-Device to Device) communication, particularly relate to the transmission plan that the interference based on Long Term Evolution (LTE-Long Term Evolution) D2D is avoided.
Background technology
In traditional third generation partner program (3GPP-3rd Generation PartnerProject) 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.The method that traditional LTE uplink communication adopts power to control guarantees that the received power of upward signal meets the expection of base station, for Physical Uplink Shared Channel (PUSCH-PhysicalUplink Shared Channel), if UE sends PUSCH at Serving cell c and do not send Physical Uplink Control Channel (PUCCH-Physical Uplink Control Channel), then UE in the transmitted power of subframe i is:
Wherein, P
cMAX, ci () is maximum transmit power, M
pUSCH, c(i) be the bandwidth-with Physical Resource Block (PRB-Physical Resource Block) that takies of PUSCH for unit, PL
cdownlink path loss, α
cpath loss compensating factor, P
o_PUSCH, cthe parameter of high-level signaling adjustment, Δ
tF, ci () is the parameter that transformat is relevant, f
ci () is the parameter of closed-loop power control signaling adjustment
In traditional 3GPP version, transfer of data occurs between base station and subscriber equipment (UE-UserEquipment).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.
If (two or more) UE of a D2D UE group participating in D2D communication resides in different communities (or part UE is in outside MPS process), one needs the problem of discussion to be the resource that the communication of described D2D UE group uses the physical resource of a community or multiple community.Further, the maximum transmit power how arranging D2D UE also needs solution.
For the problems referred to above, the invention discloses the interference avoidance scheme in a kind of D2D system.
Summary of the invention
The invention discloses the method in a kind of subscriber equipment (UE), wherein, comprise the steps:
A. receive the first signaling and determine the first physical resource pond, the first signaling is semi-static signaling
B. receive the second signaling or determine physical resource S1 voluntarily, the second signaling is the specific or specific signaling of UE group of UE
C. on described physical resource S1, D2D signal is sent with transmitted power P
Wherein, if described physical resource S1 belongs to the first physical resource pond, described transmitted power P is no more than the first power, if described physical resource S1 belongs to the second physical resource pond, described transmitted power P is no more than the second power, and the second physical resource pond is and the first nonoverlapping physical resource in physical resource pond or empty set.
Described D2D signal is D2D physical layer data or D2D physical layer signaling.As an embodiment, the subset 2 of the ascending physical signal resource of persistent district that to be subset 1, the second physical resource pond of the ascending physical signal resource of persistent district be in the first physical resource pond.As another embodiment, for TDD system, a descending sub frame (described descending sub frame is configured to up in the community that the reception UE of D2D signal is resident) of to be subset 1, the second physical resource pond of the sub-frame of uplink of persistent district be in the first physical resource pond persistent district.As another embodiment, the first physical resource pond is subset 1, the second physical resource pond of the ascending physical signal resource of persistent district is empty set.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
D. receive the 3rd signaling determine following one of at least:
-the first power
-the second power
Wherein, the 3rd signaling is semi-static signaling.
As an embodiment, the 3rd signaling is the specific signaling in community, controls (RRC-Radio Resource Contrl) message carry by common radio resources.As another embodiment, the 3rd signaling is the specific or specific signaling of UE group of UE, is carried by proprietary RRC information.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
E. receive the 4th signaling and determine the second physical resource pond, the 4th signaling is semi-static signaling or dynamic signaling.
4th signaling is sent by resident base station or D2D UE.
Concrete, according to an aspect of the present invention, it is characterized in that, the second physical resource pond is the ascending physical signal resource outside removing first physical resource pond.
According to above-mentioned aspect of the present invention, UE does not need can determine the second physical resource by signaling.
Concrete, according to an aspect of the present invention, it is characterized in that, the first physical resource pond is one of following:
-K available sub-frame
Particular sub-band S in-K available sub-frame
Wherein, described K is 0 or positive integer.
Concrete, according to an aspect of the present invention, it is characterized in that, the first power is legal maximum transmit power, and the second power is not more than the first power.
For LTE, described legal maximum transmission merit rule is 23 dBms (dBm).
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
F. send the 5th signaling and indicate the first physical resource pond.
Concrete, according to an aspect of the present invention, it is characterized in that, send the moment of described D2D signal at moment T1-T2, wherein:
If-described physical resource S1 belongs to the first physical resource pond, T1 is the time of reception of the synchronizing sequence that persistent district sends, and T2 is 0.
If-described physical resource S1 belongs to the second physical resource pond, T1 is the time of reception of the synchronizing sequence that neighbor cell sends, and T2 is 0; Or T1 is the time of reception of synchronizing sequence that persistent district sends, T2 is on the occasion of, negative value or 0.
The invention discloses a kind of method in base station, wherein, comprise the steps:
A. send the first signaling and indicate the first physical resource pond, the first signaling is semi-static signaling
B. send the second signaling instruction physical resource S1, the second signaling is the specific or specific signaling of UE group of UE
Wherein, if described physical resource S1 belongs to the first physical resource pond, the transmitted power P of the D2D UE on described physical resource S1 is no more than the first power, if described physical resource S1 belongs to the second physical resource pond, described transmitted power P is no more than the second power, and the second physical resource pond is and the first nonoverlapping physical resource in physical resource pond or empty set.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise at least one of following steps:
D. the 3rd signaling instruction is sent following one of at least:
-the first power
-the second power
Wherein, the 3rd signaling is semi-static signaling.
E. send the 4th signaling and indicate the second physical resource pond, the 4th signaling is semi-static signaling or dynamic signaling.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
G. the up transmission of dispatch scheduling on physical resource S1 is sent
H. on described physical resource S1, upstream data is received
According to above-mentioned aspect of the present invention, on described physical resource S1, multiplexing D2D physical signalling and ascending physical signal signal, improve spectrum utilization efficiency.
Concrete, according to an aspect of the present invention, it is characterized in that, the second physical resource pond is the ascending physical signal resource outside removing first physical resource pond.
Concrete, according to an aspect of the present invention, it is characterized in that, the first physical resource pond is one of following:
-K available sub-frame
Particular sub-band S in-K available sub-frame
Wherein, described K is 0 or positive integer.
Concrete, according to an aspect of the present invention, it is characterized in that, the first power is legal maximum transmit power, and the second power is not more than the first power.
The invention discloses a kind of subscriber equipment, it is characterized in that, this equipment comprises:
First module: receive the first signaling and determine the first physical resource pond, the first signaling is semi-static signaling
Second module: receive the second signaling or determine physical resource S1 voluntarily, the second signaling is the specific or specific signaling of UE group of UE
3rd module: send D2D signal with transmitted power P on described physical resource S1
Wherein, if described physical resource S1 belongs to the first physical resource pond, described transmitted power P is no more than the first power, if described physical resource S1 belongs to the second physical resource pond, described transmitted power P is no more than the second power, and the second physical resource pond is and the first nonoverlapping physical resource in physical resource pond or empty set.
As an embodiment, the said equipment also comprise following one of at least:
Four module: receive the 3rd signaling determine following one of at least:
-the first power
-the second power
Wherein, the 3rd signaling is semi-static signaling.
5th module: receive the 4th signaling and determine the second physical resource pond, the 4th signaling is semi-static signaling or dynamic signaling.
The invention discloses a kind of base station equipment, it is characterized in that, this equipment comprises:
First module: send the first signaling and indicate the first physical resource pond, the first signaling is semi-static signaling
Second module: send the second signaling instruction physical resource S1, the second signaling is the specific or specific signaling of UE group of UE
Wherein, if described physical resource S1 belongs to the first physical resource pond, the transmitted power P of the D2D UE on described physical resource S1 is no more than the first power, if described physical resource S1 belongs to the second physical resource pond, described transmitted power P is no more than the second power, and the second physical resource pond is and the first nonoverlapping physical resource in physical resource pond or empty set.
As an embodiment, the said equipment also comprise following one of at least:
3rd module: send the 3rd signaling instruction following one of at least:
-the first power
-the second power
Wherein, the 3rd signaling is semi-static signaling.
Four module: send the 4th signaling and indicate the second physical resource pond, the 4th signaling is semi-static signaling or dynamic signaling.
The invention solves the interference problem communicated across community D2D UE, for this problem, the present invention proposes a kind of D2D and send the scheme that UE and up transmission UE shares identical running time-frequency resource, improve the availability of frequency spectrum that D2D UE communicates.Further, the interference of D2D physical signalling to upward signal is reduced by the maximum transmit power of control D2D transmission UE.Existing 3GPP conclusion that the present invention is compatible.
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 transmission D2D signal according to an embodiment of the invention;
Fig. 2 shows the schematic diagram determining maximum transmit power and the second physical resource pond according to an embodiment of the invention;
Fig. 3 shows D2D UE according to an embodiment of the invention and sends the schematic diagram that signaling indicates the second physical resource pond;
Fig. 4 shows the schematic diagram of the position in the first physical resource pond according to an embodiment of the invention;
Fig. 5 shows the processing unit structured flowchart in subscriber equipment according to an embodiment of the invention;
Fig. 6 shows the processing unit 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 D2D signal, as shown in Figure 1.In accompanying drawing 1, base station B10 is the Serving cell of UE U11.
For base station B10, in step S101, send the first signaling indicate the first physical resource pond, the first signaling is semi-static signaling; Send the second signaling instruction physical resource S1 in step s 102, the second signaling is the specific or specific signaling of UE group of UE.
For UE U11, in step S111, receive the first signaling determine the first physical resource pond, the first signaling is semi-static signaling; In step S112, receive the second signaling determination physical resource S1, the second signaling is the specific or specific signaling of UE group of UE; On described physical resource S1, D2D signal is sent with transmitted power P in step S113
Wherein, if described physical resource S1 belongs to the first physical resource pond, described transmitted power P is no more than the first power.If the second physical resource pond is not for empty set and described physical resource S1 belongs to the second physical resource pond, described transmitted power P is no more than the second power, and the second physical resource pond is and the first nonoverlapping physical resource in physical resource pond.
As an alternate embodiment of embodiment 1, for base station B10, described step S102 and the second signaling are omitted, i.e. the part of broken line representation in accompanying drawing 1; For UE U11, in step S112, determine physical resource S1 voluntarily.
Embodiment 2
Embodiment 2 illustrates the schematic diagram determining maximum transmit power and the second physical resource pond, as shown in Figure 2.In accompanying drawing 2, base station B12 is the Serving cell of UE U13.
For base station B12, in step S121, send below the 3rd signaling instruction one of at least:
-the first power
-the second power
In step S122, send the 4th signaling indicate the second physical resource pond.
For UE U11, receive in step S131 the 3rd signaling determine following one of at least:
-the first power
-the second power
In step S132, receive the 4th signaling and determine the second physical resource pond.
Above-mentioned 3rd signaling is semi-static signaling, and above-mentioned 3rd signaling is that community is specific or UE specific or UE group is specific, and above-mentioned 4th signaling is semi-static signaling or dynamic signaling.
Embodiment 3
Embodiment 3 illustrates D2D UE and sends the schematic diagram that signaling indicates the second physical resource pond, as shown in Figure 3.In accompanying drawing 3, base station B14 is the Serving cell of UE U15, and base station B17 is the Serving cell of UE U16.
For base station B14, send signaling C1 in step s 141 and indicate physics resource pool R1; For base station B17, in step S171, send signaling C3 indicate physics resource pool R2.
For UE U15, in step S151, receive signaling C1 determine physical resource pond R1; In step S152, send signaling C2 indicate physics resource pool R1.
For UE U16, in step S161, receive signaling C3 determine physical resource pond R2; In step S162, receive signaling C2 determine physical resource pond R1; Physical resource S1 is determined voluntarily in step S163; On physical resource S1, D2D signal is sent with transmitted power P at moment T1-T2 in step S164.Wherein, if described physical resource S1 belongs to physical resource pond R2, described transmitted power P is no more than the first power and 23dBm, T1 is the time of reception of main synchronizing sequence secondary synchronization sequences (PSS/SSS-Primary/Secondary synchronizationsequence) at UE U16 of base station B17 transmission, and T2 is 0; If described physical resource S1 belongs to physical resource pond R1, described transmitted power P is no more than the second power (the second power predefine or configured by base station B17), and T1 is the time of reception of the PSS/SSS that base station B14 sends, and T2 is 0.
Embodiment 4
Embodiment 4 illustrates the schematic diagram of the position in the first physical resource pond, as shown in Figure 4.
In FDD system, D2D UE receives the first signaling and determines the first physical resource pond, and the first signaling is semi-static signaling; First physical resource pond is as accompanying drawing 4(a) in shown in grey mark, the first physical resource pond occupies K subframe of FDD up-link carrier, and K is that the number of sub frames that comprised in the first signaling scheduling cycle is divided by 8.
As an alternate embodiment of embodiment 4, in TDD system, D2D UE receives the first signaling and determines the first physical resource pond, and the first signaling is semi-static signaling; First physical resource pond is as accompanying drawing 4(b) in grey mark shown in, the first physical resource pond occupies a sub-band in the 2nd sub-frame of uplink of each frame in the continuous K frame of TDD.K is the frame number comprised in the first signaling scheduling cycle.
Embodiment 5
Embodiment 5 illustrates the processing unit structured flowchart in subscriber equipment, as shown in Figure 5.In accompanying drawing 5, UE processing unit 400 is by receiver module 401, and determination module 402, determination module 403, sending module 404 forms.
Receiver module 401 receives the first signaling and determines the first physical resource pond, and the first signaling is semi-static signaling; Determination module 402 receives the second signaling or determines that physical resource S1(dotted arrow represents that determination module 402 not necessarily receives the second signaling voluntarily), the second signaling is the specific or specific signaling of UE group of UE; Determination module 403 receives signaling and determines the first power.Sending module 404 sends D2D signal with transmitted power P on described physical resource S1
Wherein, described transmitted power P is no more than the first power.
Embodiment 6
Embodiment 6 illustrates the processing unit structured flowchart in base station equipment, as shown in Figure 6.In accompanying drawing 6, base station processing unit 500 is by dispensing device 501, and dispensing device 502, dispensing device 503 forms.
Dispensing device 501 sends the first signaling and indicates the first physical resource pond, and the first signaling is semi-static signaling; Dispensing device 502 sends the second signaling instruction physical resource S1, and the second signaling is the specific or specific signaling of UE group of UE; It is following one of at least that dispensing device 503 sends signaling instruction:
-the first power
-the second power
-the second physical resource pond
Wherein, if described physical resource S1 belongs to the first physical resource pond, the transmitted power P of the D2D UE on described physical resource S1 is no more than the first power, if described physical resource S1 belongs to the second physical resource pond, described transmitted power P is no more than the second power, and the second physical resource pond is and the first nonoverlapping physical resource in physical resource pond or empty set.
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 (18)
1. the method in UE, wherein, comprises the steps:
A. receive the first signaling and determine the first physical resource pond, the first signaling is semi-static signaling
B. receive the second signaling or determine physical resource S1 voluntarily, the second signaling is the specific or specific signaling of UE group of UE
C. on described physical resource S1, D2D signal is sent with transmitted power P
Wherein, if described physical resource S1 belongs to the first physical resource pond, described transmitted power P is no more than the first power, if described physical resource S1 belongs to the second physical resource pond, described transmitted power P is no more than the second power, and the second physical resource pond is and the first nonoverlapping physical resource in physical resource pond or empty set.
2. method according to claim 1, is characterized in that, also comprises the steps:
D. receive the 3rd signaling determine following one of at least:
-the first power
-the second power
Wherein, the 3rd signaling is semi-static signaling.
3. method according to claim 1, is characterized in that, also comprises the steps:
E. receive the 4th signaling and determine the second physical resource pond, the 4th signaling is semi-static signaling or dynamic signaling.
4. method according to claim 1, is characterized in that, the second physical resource pond is the ascending physical signal resource outside removing first physical resource pond.
5. method according to claim 1, is characterized in that, the first physical resource pond is one of following:
-K available sub-frame
Particular sub-band S in-K available sub-frame
Wherein, described K is 0 or positive integer.
6. method according to claim 1, is characterized in that, the first power is legal maximum transmit power, and the second power is not more than the first power.
7. method according to claim 1, is characterized in that, also comprises the steps:
F. send the 5th signaling and indicate the first physical resource pond.
8. method according to claim 1, is characterized in that, sends the moment of described D2D signal at moment T1-T2, wherein:
If-described physical resource S1 belongs to the first physical resource pond, T1 is the time of reception of the synchronizing sequence that persistent district sends, and T2 is 0.
If-described physical resource S1 belongs to the second physical resource pond, T1 is the time of reception of the synchronizing sequence that neighbor cell sends, and T2 is 0; Or T1 is the time of reception of synchronizing sequence that persistent district sends, T2 is on the occasion of, negative value or 0.
9. the method in base station, wherein, comprises the steps:
A. send the first signaling and indicate the first physical resource pond, the first signaling is semi-static signaling
B. send the second signaling instruction physical resource S1, the second signaling is the specific or specific signaling of UE group of UE
Wherein, if described physical resource S1 belongs to the first physical resource pond, the transmitted power P of the D2D UE on described physical resource S1 is no more than the first power, if described physical resource S1 belongs to the second physical resource pond, described transmitted power P is no more than the second power, and the second physical resource pond is and the first nonoverlapping physical resource in physical resource pond or empty set.
10. method according to claim 9, is characterized in that, also comprises at least one of following steps:
D. the 3rd signaling instruction is sent following one of at least:
-the first power
-the second power
Wherein, the 3rd signaling is semi-static signaling.
E. send the 4th signaling and indicate the second physical resource pond, the 4th signaling is semi-static signaling or dynamic signaling.
11. methods according to claim 9, is characterized in that, also comprise the steps:
G. the up transmission of dispatch scheduling on physical resource S1 is sent
H. on described physical resource S1, upstream data is received.
12. methods according to claim 9, is characterized in that, the second physical resource pond is the ascending physical signal resource outside removing first physical resource pond.
13. methods according to claim 9, is characterized in that, the first physical resource pond is one of following:
-K available sub-frame
Particular sub-band S in-K available sub-frame
Wherein, described K is 0 or positive integer.
14. methods according to claim 9, is characterized in that, the first power is legal maximum transmit power, and the second power is not more than the first power.
15. 1 kinds of subscriber equipmenies, is characterized in that, this equipment comprises:
First module: receive the first signaling and determine the first physical resource pond, the first signaling is semi-static signaling
Second module: receive the second signaling or determine physical resource S1 voluntarily, the second signaling is the specific or specific signaling of UE group of UE
3rd module: send D2D signal with transmitted power P on described physical resource S1
Wherein, if described physical resource S1 belongs to the first physical resource pond, described transmitted power P is no more than the first power, if described physical resource S1 belongs to the second physical resource pond, described transmitted power P is no more than the second power, and the second physical resource pond is and the first nonoverlapping physical resource in physical resource pond or empty set.
16. equipment according to claim 15, is characterized in that, this equipment also comprise following one of at least:
Four module: receive the 3rd signaling determine following one of at least:
-the first power
-the second power
Wherein, the 3rd signaling is semi-static signaling.
5th module: receive the 4th signaling and determine the second physical resource pond, the 4th signaling is semi-static signaling or dynamic signaling.
17. 1 kinds of base station equipments, is characterized in that, this equipment comprises:
First module: send the first signaling and indicate the first physical resource pond, the first signaling is semi-static signaling
Second module: send the second signaling instruction physical resource S1, the second signaling is the specific or specific signaling of UE group of UE
Wherein, if described physical resource S1 belongs to the first physical resource pond, the transmitted power P of the D2D UE on described physical resource S1 is no more than the first power, if described physical resource S1 belongs to the second physical resource pond, described transmitted power P is no more than the second power, and the second physical resource pond is and the first nonoverlapping physical resource in physical resource pond or empty set.
18. equipment according to claim 17, is characterized in that, this equipment also comprise following one of at least:
3rd module: send the 3rd signaling instruction following one of at least:
-the first power
-the second power
Wherein, the 3rd signaling is semi-static signaling.
Four module: send the 4th signaling and indicate the second physical resource pond, the 4th signaling is semi-static signaling or dynamic signaling.
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| CN108924852A (en) * | 2017-03-26 | 2018-11-30 | 上海朗帛通信技术有限公司 | A kind of user equipment that be used to wirelessly communicate, the method and apparatus in base station |
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Also Published As
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|---|---|
| CN110049541A (en) | 2019-07-23 |
| CN110049541B (en) | 2021-09-24 |
| CN104602350B (en) | 2019-04-12 |
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