INTERFERENCE COORDINATION METHOD AND DEVICE

• US 20170142736A1
• Filed: 01/27/2017
• Published: 05/18/2017
• Est. Priority Date: 07/29/2014
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: LIU, Rui, SI, Fazhong, YANG, Liping, LI, Xia
• Granted Patent: US 10,172,142 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

For a terminal located in any area of a first cell in a first system, a sum of actual interference of all second cells to any spectrum resource to be used by the terminal can be determined according to a pre-established interference matrix for representing historical reference interference of each second cell in a second system to each area in the first cell and a spectrum resource real-time occupation status of each second cell; when it is determined that the sum does not exceed a preset interference threshold value range, it is determined that the terminal can use the any spectrum resource; or when it is determined that the sum exceeds a preset interference threshold value range, it is determined that the terminal cannot use the any spectrum resource.

Claims

1. A network-side coordination device, comprising:

a receiver, configured to receive an interference coordination request initiated by a terminal located in any area of a first cell, wherein the interference coordination request is initiated to the network-side coordination device before the terminal uses any to-be-used spectrum resource;

a processor, configured to pre-establish an interference matrix for representing historical reference interference of each second cell to each area in the first cell;

acquire a spectrum resource real-time occupation status of each second cell;

determine, according to the pre-established interference matrix and the acquired spectrum resource real-time occupation status of each second cell, a sum of actual interference of all second cells to the any to-be-used spectrum resource to be used by the terminal;

determine whether the determined sum of the actual interference does not exceed a preset interference threshold value range; and

if yes, trigger a sender to deliver a first scheduling indication to the terminal, or if not, trigger a sender to deliver a second scheduling indication to the terminal; and

the sender, configured to deliver, as triggered by the processor, the first scheduling indication to the terminal, to indicate that the terminal can use the any to-be-used spectrum resource;

or deliver, as triggered by the processor, the second scheduling indication to the terminal, to indicate that the terminal cannot use the any to-be-used spectrum resource, wherein

the first cell is any cell in a first system, the second cell is any cell in a second system, and the second cell is a neighboring cell of the first cell.

2. The network-side coordination device according to claim 1, wherein the first system and the second system are a combination of any two of Global System for Mobile Communications GSM, Universal Mobile Telecommunications System UMTS, Long Term Evolution LTE, Code Division Multiple Access CDMA, Time Division-Synchronous Code Division Multiple Access TD-SCDMA, and a wireless local area network WLAN.

3. The network-side coordination device according to claim 1, wherein the processor is specifically configured to establish the interference matrix based on measurement information that is reported by each terminal in the first cell within a set time period and collected in advance, wherein

the measurement information comprises any one or more of signal strength of a signal received by each terminal in the first cell from each second cell, signal quality of the signal received by each terminal in the first cell from each second cell, a distance between each second cell and a location of each terminal in the first cell, and a signal loss of a signal transmitted from each second cell to the location of each terminal in the first cell.

4. The network-side coordination device according to claim 3, wherein the processor is further configured to collect, in real time or regularly, the measurement information reported by each terminal in the first cell, and update the pre-established interference matrix according to the measurement information that is reported by each terminal in the first cell and collected in real time or regularly.

5. The network-side coordination device according to claim 3, wherein the processor is specifically configured to divide a cell coverage area of the first cell into N sub-areas according to a set area division rule, wherein N is any natural number;

for any sub-area, determine, according to the measurement information that is reported by each terminal in the first cell and collected in the set time period, historical reference interference of each spectrum resource configured in each second cell to the any sub-area;

generate, according to the determined historical reference interference of each spectrum resource configured in each second cell to the any sub-area, an interference sub-matrix corresponding to the any sub-area; and

use an interference sub-matrix set formed by all determined interference sub-matrixes corresponding to all sub-areas as the established interference matrix for representing the historical reference interference of each second cell to each area in the first cell.

6. The network-side coordination device according to claim 1, wherein an expression manner of the historical reference interference or the actual interference of each second cell to each area in the first cell at least comprises:

any one or more of signal strength of a signal transmitted from each second cell when the signal arrives at each area in the first cell, signal quality of the signal transmitted from each second cell when the signal arrives at each area in the first cell, a distance between each second cell and each area in the first cell, and a signal loss of a signal transmitted from each second cell when the signal arrives at each area in the first cell.

7. The network-side coordination device according to claim 2, wherein if the first cell is any cell in the LTE system and the second cell is any cell in the GSM system, the processor is specifically configured to:

determine a spectrum resource real-time occupation status S of each second cell, wherein the spectrum resource real-time occupation status S is shown in the following formula;

S={CELL_1(X0, X1, . . . , Xi), CELL_2(X0, X1, . . . , Xi), . . . , CELL n(X0, X1, . . . , Xi)}, wherein n is a quantity of the second cells and n is any natural number;

i indicates a quantity of spectrum resources configured in each second cell and i is any natural number;

and Xi indicates a real-time occupation status of the i^th spectrum resource configured in each second cell, wherein it indicates that the spectrum resource is occupied if a value of Xi is 1 and it indicates that the spectrum resource is released if the value is 0;

determine, according to the interference matrix, historical reference interference I_n of each spectrum resource configured in the n^th second cell to the terminal in the any area, wherein I_n is shown in the following formula;

I_n=CELL_n(Y0, Y1, . . . Yi), wherein CELL_n(Yi) indicates historical reference interference of the i^th spectrum resource configured in the n^th second cell to the terminal in the any area; and

determine, by using the following formula, a sum I_total of actual interference of all spectrum resources configured in all second cells to any spectrum resource to be used by the terminal in the any area;

I_total=CELL_1(X0*Y0*θ

0+X1*Y1*θ

1+ . . . +Xi*Yi*θ

i)+CELL_2(X0*Y0*θ

0+X1*Y1*θ

1+ . . . +Xi*Yi*θ

i+ . . . +CELL_n(X0*Y0*θ

0+X1*Y1*θ

1+ . . . +Xi*Yi*θ

i), wherein θ

indicates an interference weight modification value of each spectrum resource, and CELL_n(Xi*Yi) indicates actual interference of the i^th spectrum resource configured in the n^th second cell to the any spectrum resource to be used by the terminal in the any area.

8. A terminal, comprising:

a sender, configured to;

when the terminal is located in any area of a first cell and before the terminal uses any to-be-used spectrum resource, initiate an interference coordination request to a network-side coordination device for the any to-be-used spectrum resource;

a receiver, configured to receive a first scheduling indication or a second scheduling indication delivered by the network-side coordination device, wherein the first scheduling indication is delivered by the network-side coordination device to the terminal when the network-side coordination device determines, after receiving the interference coordination request and according to a pre-established interference matrix for representing historical reference interference of each second cell to each area in the first cell and an acquired spectrum resource real-time occupation status of each second cell, that a sum of actual interference of all second cells to the any to-be-used spectrum resource to be used by the terminal does not exceed a preset interference threshold value range;

the second scheduling indication is delivered by the network-side coordination device to the terminal when the network-side coordination device determines that the sum of the actual interference of all second cells to the any to-be-used spectrum resource to be used by the terminal exceeds the preset interference threshold value range;

the first cell is any cell in a first system, the second cell is any cell in a second system, and the second cell is a neighboring cell of the first cell; and

a processor, configured to;

when the receiver receives the first scheduling indication delivered by the network-side coordination device, use the any to-be-used spectrum resource according to the first scheduling indication;

or configured to;

when the receiver receives the second scheduling indication delivered by the network-side coordination device, refuse to use the any to-be-used spectrum resource according to the second scheduling indication.

9. The terminal according to claim 8, wherein the first system and the second system are a combination of any two of Global System for Mobile Communications GSM, Universal Mobile Telecommunications System UMTS, Long Term Evolution LTE, Code Division Multiple Access CDMA, Time Division-Synchronous Code Division Multiple Access TD-SCDMA, and a wireless local area network WLAN.

10. The terminal according to claim 8, wherein the sender is further configured to report measurement information to the network-side coordination device in real time or regularly before, at the same time when, or after the terminal initiates the interference coordination request to the network-side coordination device, wherein the measurement information comprises any one or more of signal strength of a signal received by the terminal from each second cell, signal quality of the signal received by the terminal from each second cell, a distance between each second cell and a location of the terminal, and a signal loss of a signal transmitted from each second cell to the location of the terminal.

11. A control device, comprising:

a processor, configured to acquire a spectrum resource real-time occupation status of a second cell; and

a sender, configured to report the spectrum resource real-time occupation status acquired by the processor to a network-side coordination device, so that the network-side coordination device determines, when receiving an interference coordination request initiated by a terminal located in any area of a first cell for any to-be-used spectrum resource, and according to a pre-established interference matrix for representing historical reference interference of each second cell to each area in the first cell and the acquired spectrum resource real-time occupation status of each second cell, a sum of actual interference of all second cells to the any to-be-used spectrum resource to be used by the terminal, and delivers a first scheduling indication to the terminal when determining that the sum of the actual interference does not exceed a preset interference threshold value range, to indicate that the terminal can use the any to-be-used spectrum resource;

or delivers a second scheduling indication to the terminal when determining that the sum of the actual interference exceeds a preset interference threshold value range, to indicate that the terminal cannot use the any to-be-used spectrum resource, wherein

the first cell is any cell in a first system, the second cell is any cell in a second system, and the second cell is a neighboring cell of the first cell.

12. The control device according to claim 11, wherein the first system and the second system are a combination of any two of Global System for Mobile Communications GSM, Universal Mobile Telecommunications System UMTS, Long Term Evolution LTE, Code Division Multiple Access CDMA, Time Division-Synchronous Code Division Multiple Access TD-SCDMA, and a wireless local area network WLAN.

13. An interference coordination method, comprising:

receiving, by a network-side coordination device, an interference coordination request initiated by a terminal located in any area of a first cell, wherein the interference coordination request is initiated to the network-side coordination device before the terminal uses any to-be-used spectrum resource;

determining, according to a pre-established interference matrix for representing historical reference interference of each second cell to each area in the first cell and an acquired spectrum resource real-time occupation status of each second cell, a sum of actual interference of all second cells to the any to-be-used spectrum resource to be used by the terminal; and

determining whether the determined sum of the actual interference does not exceed a preset interference threshold value range; and

if yes, delivering a first scheduling indication to the terminal, to indicate that the terminal can use the any to-be-used spectrum resource, or if not, delivering a second scheduling indication to the terminal, to indicate that the terminal cannot use the any to-be-used spectrum resource, wherein

the first cell is any cell in a first system, the second cell is any cell in a second system, and the second cell is a neighboring cell of the first cell.

14. The interference coordination method according to claim 13, wherein the first system and the second system are a combination of any two of Global System for Mobile Communications GSM, Universal Mobile Telecommunications System UMTS, Long Term Evolution LTE, Code Division Multiple Access CDMA, Time Division-Synchronous Code Division Multiple Access TD-SCDMA, and a wireless local area network WLAN.

15. The interference coordination method according to claim 13, wherein the interference matrix is established by the network-side coordination device based on measurement information that is reported by each terminal in the first cell within a set time period and collected in advance, wherein

the measurement information comprises any one or more of signal strength of a signal received by each terminal in the first cell from each second cell, signal quality of the signal received by each terminal in the first cell from each second cell, a distance between each second cell and a location of each terminal in the first cell, and a signal loss of a signal transmitted from each second cell to the location of each terminal in the first cell.

16. The interference coordination method according to claim 15, wherein the method further comprises:

collecting, in real time or regularly, the measurement information that is reported by each terminal in the first cell, and updating the pre-established interference matrix based on the measurement information that is reported by each terminal in the first cell and collected in real time or regularly.

17. The interference coordination method according to claim 15, wherein the establishing the interference matrix based on measurement information that is reported by each terminal in the first cell within a set time period and collected in advance comprises:

dividing a cell coverage area of the first cell into N sub-areas according to a set area division rule, wherein N is any natural number;

for any sub-area, determining, according to the measurement information that is reported by each terminal in the first cell and collected in the set time period, historical reference interference of each spectrum resource configured in each second cell to the any sub-area, and generating, according to the determined historical reference interference of each spectrum resource configured in each second cell to the any sub-area, an interference sub-matrix corresponding to the any sub-area; and

using an interference sub-matrix set formed by all determined interference sub-matrixes corresponding to all sub-areas as the established interference matrix for representing the historical reference interference of each second cell to each area in the first cell.

18. The interference coordination method according to claim 13, wherein an expression manner of the historical reference interference or the actual interference of each second cell to each area in the first cell at least comprises:

any one or more of signal strength of a signal transmitted from each second cell when the signal arrives at each area in the first cell, signal quality of the signal transmitted from each second cell when the signal arrives at each area in the first cell, a distance between each second cell and each area in the first cell, and a signal loss of a signal transmitted from each second cell when the signal arrives at each area in the first cell.

19. The interference coordination method according to claim 14, wherein if the first cell is any cell in the LTE system and the second cell is any cell in the GSM system, the determining, according to an established interference matrix and a spectrum resource real-time occupation status of each second cell, a sum of actual interference of all second cells to the any spectrum resource to be used by the terminal in any area of the first cell comprises:

determining a spectrum resource real-time occupation status S of each second cell, wherein the spectrum resource real-time occupation status S is shown in the following formula;

S={CELL_1(X0, X1, . . . , Xi), CELL_2(X0, X1, . . . , Xi), . . . , CELL_n(X0, X1, . . . , Xi)}, wherein n is a quantity of the second cells and n is any natural number;

i indicates a quantity of spectrum resources configured in each second cell and i is any natural number;

and Xi indicates a real-time occupation status of the i^th spectrum resource configured in each second cell, wherein it indicates that the spectrum resource is occupied if a value of Xi is 1 and it indicates that the spectrum resource is released if the value is 0;

determining, according to the interference matrix, historical reference interference I_n of each spectrum resource configured in the n^th second cell to the terminal in the any area, wherein I_n is shown in the following formula;

I_n=CELL_n(Y0, Y1, . . . , Yi), wherein CELL_n(Yi) indicates historical reference interference of the i^th spectrum resource configured in the n^th second cell to the terminal in the any area; and

determining, by using the following formula, a sum I_total of actual interference of all spectrum resources configured in all second cells to any spectrum resource to be used by the terminal in the any area;

I_total=CELL_1(X0*Y0*θ

0+X1*Y1*θ

1+ . . . +Xi*Yi*θ

i)+CELL_2(X0*Y0*θ

0+X1*Y1*74 1+ . . +Xi*Yi*θ

i)+ . . . +CELL_n(X0*Y0*θ

0+X1*Y1*θ

1+ . . +Xi*Yi*θ

i), wherein θ

indicates an interference weight modification value of each spectrum resource, and CELL_n(Xi*Yi) indicates actual interference of the i^th spectrum resource configured in the n^th second cell to the any spectrum resource to be used by the terminal in the any area.

20. An interference coordination method, comprising:

before a terminal located in any area of a first cell uses any to-be-used spectrum resource, initiating an interference coordination request to a network-side coordination device for the any to-be-used spectrum resource; and

if a first scheduling indication delivered by the network-side coordination device is received, using the any to-be-used spectrum resource;

if a second scheduling indication delivered by the network-side coordination device is received, refusing to use the any to-be-used spectrum resource, wherein

the first scheduling indication is delivered by the network-side coordination device to the terminal when the network-side coordination device determines, after receiving the interference coordination request and according to a pre-established interference matrix for representing historical reference interference of each second cell to each area in the first cell and an acquired spectrum resource real-time occupation status of each second cell, that a sum of actual interference of all second cells to the any to-be-used spectrum resource to be used by the terminal does not exceed a preset interference threshold value range;

the second scheduling indication is delivered by the network-side coordination device to the terminal when the network-side coordination device determines that the sum of the actual interference of all second cells to the any to-be-used spectrum resource to be used by the terminal exceeds the preset interference threshold value range, wherein

the first cell is any cell in a first system, the second cell is any cell in a second system, and the second cell is a neighboring cell of the first cell.

21. The interference coordination method according to claim 20, wherein the first system and the second system are a combination of any two of Global System for Mobile Communications GSM, Universal Mobile Telecommunications System UMTS, Long Term Evolution LTE, Code Division Multiple Access CDMA, Time Division-Synchronous Code Division Multiple Access TD-SCDMA, and a wireless local area network WLAN.

22. The interference coordination method according to claim 20, wherein before, at the same time when, and after the terminal initiates the interference coordination request to the network-side coordination device, the method further comprises:

reporting measurement information to the network-side coordination device in real time or regularly, wherein

the measurement information comprises any one or more of signal strength of a signal received by the terminal from each second cell, signal quality of the signal received by the terminal from each second cell, a distance between each second cell and a location of the terminal, and a signal loss of a signal transmitted from each second cell to the location of the terminal.

23. An interference coordination method, comprising:

acquiring, by a control device in a second cell, a spectrum resource real-time occupation status of the second cell; and

reporting the acquired spectrum resource real-time occupation status to a network-side coordination device, so that the network-side coordination device determines, when receiving an interference coordination request initiated by a terminal located in any area of a first cell for any to-be-used spectrum resource, and according to a pre-established interference matrix for representing historical reference interference of each second cell to each area in the first cell and the acquired spectrum resource real-time occupation status of each second cell, a sum of actual interference of all second cells to the any to-be-used spectrum resource to be used by the terminal, and delivers a first scheduling indication to the terminal when determining that the sum of the actual interference does not exceed a preset interference threshold value range, to indicate that the terminal can use the any to-be-used spectrum resource;

or delivers a second scheduling indication to the terminal when determining that the sum of the actual interference exceeds a preset interference threshold value range, to indicate that the terminal cannot use the any to-be-used spectrum resource, wherein

the first cell is any cell in a first system, the second cell is any cell in a second system, and the second cell is a neighboring cell of the first cell.

24. The interference coordination method according to claim 23, wherein the first system and the second system are a combination of any two of Global System for Mobile Communications GSM, Universal Mobile Telecommunications System UMTS, Long Term Evolution LTE, Code Division Multiple Access CDMA, Time Division-Synchronous Code Division Multiple Access TD-SCDMA, and a wireless local area network WLAN.