METHOD AND APPARATUS FOR DL/UL RESOURCE CONFIGURATION IN A TDD SYSTEM

• US 20150358836A1
• Filed: 01/16/2013
• Published: 12/10/2015
• Est. Priority Date: 01/16/2013
• Status: Abandoned Application

• Current Assignee: NEC China Co Ltd (NEC Corporation)
• Original Assignee: NEC China Co Ltd (NEC Corporation)
• Inventors: ZHU, Dalin, ZHANG, Yu, LI, Chaofeng, WANG, Gang, LEI, Ming, SUN, Zhennian
• Application Number:
  US14/759,338
• Publication Number:
  US 20150358836A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

Embodiments of the present disclosure relate to a method and apparatus for DL/UL resource configuration in a Time Division Duplex (TDD) system. The method may comprise: dividing a plurality of cells into disjoint clusters based on interference conditions among base stations of the plurality of cells; and performing, in each of at least one of the disjoint clusters, a cooperation DL/UL resource configuration on in-cluster cells included therein based on traffic conditions and performance metrics of the in-cluster cells, so as to determine respective DL/UL resource configurations for the in-cluster cells. With embodiments of the present disclosure, time domain resources may be utilized more efficiently and, additionally, it may be expected to achieve a better overall performance at a low cost.

Claims

1. A method for downlink (DL)/uplink (UL) resource configuration in a Time Division Duplex (TDD) system, comprising

dividing a plurality of cells into disjoint clusters based on interference conditions among base stations of the plurality of cells;

and

performing, in each of at least one of the disjoint clusters, a cooperation DL/UL resource configuration on in-cluster cells included therein based on traffic conditions and performance metrics of the in-cluster cells, so as to determine respective DL/UL resource configurations for the in-cluster cells.

2. The method according to claim 1, wherein the performing a cooperation DL/UL resource configuration on in-cluster cells comprise:

assigning subframe configurations to the in-cluster cells by performing an optimization resource configuration operation with an optimization objective of an overall performance metric that combines the traffic conditions and the performance metrics of the in-cluster cells.

3. The method according to claim 2, wherein the performing an optimization resource configuration operation comprises

obtaining history information on the performance metrics for at least part of all possible subframe patterns, wherein a subframe pattern indicates a subframe combination at a same subframe in configurations for the cells;

obtaining information on the traffic conditions of the in-cluster cells; and

searching, based on the history information on the performance metrics and the information on the traffic conditions, configurations for the in-cluster cells, which can achieve an optimal overall performance metric.

4. The method according to claim 3, wherein the at least part of possible subframe patterns comprises subframe patterns each involving both a subframe for downlink transmission and a subframe for uplink transmission.

5. The method according to claim 2, wherein the performing an optimization resource configuration operation further comprises determining initial configurations for the in-cluster cells based on their respective traffic conditions and/or transmission capabilities.

6. The method according to claim 2, wherein the performing an optimization resource configuration operation is based on a trellis exploration algorithm.

7. The method according to claim 1, wherein the number of cells in a cluster is limited to a predetermined value.

8. The method according to claim 1, wherein the method is re-performed in response to triggering of resource reconfiguration.

9. The method according to claim 1, wherein the performance metrics comprise one or more of:

downlink throughput performance;

uplink throughput performance;

overall system throughput;

signal quality; and

traffic condition match.

10. The method according to claim 1, wherein the interference conditions among base stations of the plurality of cells comprise one or more of

inter-cell distance;

path loss among cells;

coupling loss among cells;

history interference measurements;

history downlink/uplink throughputs; and

history subframe configurations.

11. An apparatus for downlink (DL)/uplink (UL) resource configuration in a Time Division Duplex (TDD) system, comprising

a cell clustering unit configured to divide a plurality of cells into disjoint clusters based on interference conditions among base stations of the plurality of cells;

and

a resource configuration unit configured to perform, in each of at least one of the disjoint clusters, a cooperation DL/UL resource configuration on in-cluster cells included therein based on traffic conditions and performance metrics of the in-cluster cells, so as to determine respective DL/UL resource configurations for the in-cluster cells.

12. The apparatus according to claim 11, wherein the resource configuration unit is further configured to:

assign subframe configurations to the in-cluster cells by performing an optimization resource configuration operation with an optimization objective of an overall performance metric that combines the traffic conditions and the performance metrics of the in-cluster cells.

13. The apparatus according to claim 12, wherein the performing an optimization resource configuration operation comprises

obtaining history information on the performance metrics for at least part of all possible subframe patterns, wherein a subframe pattern indicates a subframe combination at a same subframe in configurations for the cells;

obtaining information on the traffic conditions of the in-cluster cells; and

searching, based on the history information on the history performance metrics and the information on the traffic conditions, configurations for the in-cluster cells, which can achieve an optimal overall performance metric.

14. The apparatus according to claim 13, wherein the at least part of possible subframe patterns comprises subframe patterns each involving both a subframe for downlink transmission and a subframe for uplink transmission.

15. The apparatus according to claim 12, wherein the performing an optimization resource configuration operation further comprises determining initial configurations for the in-cluster cells based on their respective traffic conditions and/or transmission capabilities.

16. The apparatus according to claim 12, wherein the performing an optimization resource configuration operation is based on a trellis exploration algorithm.

17. The apparatus according to claim 11, wherein the number of cells in a cluster is limited to a predetermined value.

18. The apparatus according to claim 11, wherein the apparatus is configured to re-perform in response to triggering of resource reconfiguration.

19. The apparatus according to claim 11, wherein the performance metrics comprise one or more of:

downlink throughput performance;

uplink throughput performance;

overall system throughput;

signal quality; and

traffic condition match.

20. The apparatus according to claim 11, wherein the interference conditions among base stations of the plurality of cells comprise one or more of inter-cell distance;

path loss among cells;

coupling loss among cells;

history interference measurements;

history downlink/uplink throughputs; and

history subframe configurations.