Method and base station for implementing carrier aggregation

• US 20120009935A1
• Filed: 08/24/2009
• Published: 01/12/2012
• Est. Priority Date: 03/27/2009
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Wei, Wei
• Granted Patent: US 8,688,135 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

The present invention discloses a method and base station for implementing a carrier aggregation. The method comprises: a base station determines predetermined information, wherein the predetermined information comprises reserved resources for the carrier aggregation and the capability of a user terminal; the base station selects a first carrier resource from the reserved resources according to the capability of the user terminal and selects, for the user terminal, a second carrier resource for bearing data from the resources except the reserved resources; and the base station aggregates the first and second carrier resources. On the premise of reducing the inter-cell interference, the present invention can increase the number of the carriers used by the user terminal to meet the various requirements of a new wireless communication network and guarantee the communication quality of the wireless communication network.

Claims

1. A method for implementing a carrier aggregation, comprising:

determining predetermined information by a base station, wherein the predetermined information comprises reserved resources for the carrier aggregation and the capability of a user terminal;

selecting a first carrier resource by the base station from the reserved resources according to the capability of the user terminal and selecting, for the user terminal, a second carrier resource for bearing data by the base station from the resources except the reserved resources; and

aggregating the first and second carrier resources by the base station.

2. The method according to claim 1, wherein the step that aggregating the first and second carrier resources by the base station comprises:

the base station receives a measurement result reported by the user terminal, wherein the measurement result is the result of a measurement of the user terminal on the interference of the first and second carrier resources selected by the base station;

the base station determines, according to the measurement result, whether the interference of the user terminal meets the conditions for an inter-cell interference coordination in the system and

if the interference of the user terminal meets the conditions for an inter-cell interference coordination in the system, the base station aggregates the first and second carrier resources.

3. The method according to claim 2, wherein the step that the base station determines, according to the measurement result, whether the interference meets the conditions further comprises:

if the result of the determination is that the interference of the user terminal fails to meet the conditions for an inter-cell interference coordination in the system, the base station takes the second carrier resource and the reserved resources as new reserved resources and reselects a first carrier resource from the new reserved resources.

4. The method according to claim 1, wherein the predetermined information determined by the base station further comprises:

the dimensions of the carriers participating in the carrier aggregation, and the dimensions are determined by the base station according to the bandwidth types supported by all the user terminal.

5. The method according to claim 1, wherein the base station determines the reserved resources according to at least one of the factors:

load condition of the current system, the capability of the user terminal and/or the change thereof, the bandwidth types supported by all the user terminal, and condition of the inter-cell interference.

6. The method according to claim 1, wherein in neighboring cells, all the reserved resources determined by the base station for the carrier aggregation are orthogonal resources.

7. The method according to claim 1, wherein the capability of the user terminal determined by the base station comprises:

a bandwidth capability of the user terminal, the number of the aggregation-affecting carriers and the dimensions of the aggregation-affecting carriers.

8. The method according to claim 1, wherein after the base station aggregates the carrier resources and the other carrier resources, the method further comprising:

the base station reselects a first carrier resource when the interference caused by the use of a new carrier resulting from the aggregation by the user terminal fails to meet the conditions.

9. The method according to claim 1, wherein the first carrier resource is used for bearing control signaling and a physical process of the user terminal.

12. The method according to claim 2, wherein after the base station aggregates the carrier resources and the other carrier resources, the method further comprising:

the base station reselects a first carrier resource when the interference caused by the use of a new carrier resulting from the aggregation by the user terminal fails to meet the conditions.

13. The method according to claim 3, wherein after the base station aggregates the carrier resources and the other carrier resources, the method further comprising:

the base station reselects a first carrier resource when the interference caused by the use of a new carrier resulting from the aggregation by the user terminal fails to meet the conditions.

14. The method according to claim 4, wherein after the base station aggregates the carrier resources and the other carrier resources, the method further comprising:

the base station reselects a first carrier resource when the interference caused by the use of a new carrier resulting from the aggregation by the user terminal fails to meet the conditions.

15. The method according to claim 5, wherein after the base station aggregates the carrier resources and the other carrier resources, the method further comprising:

the base station reselects a first carrier resource when the interference caused by the use of a new carrier resulting from the aggregation by the user terminal fails to meet the conditions.

16. The method according to claim 6, wherein after the base station aggregates the carrier resources and the other carrier resources, the method further comprising:

the base station reselects a first carrier resource when the interference caused by the use of a new carrier resulting from the aggregation by the user terminal fails to meet the conditions.

17. The method according to claim 7, wherein after the base station aggregates the carrier resources and the other carrier resources, the method further comprising:

the base station reselects a first carrier resource when the interference caused by the use of a new carrier resulting from the aggregation by the user terminal fails to meet the conditions.

18. The method according to claim 2, wherein the first carrier resource is used for bearing control signaling and a physical process of the user terminal.

19. The method according to claim 3, wherein the first carrier resource is used for bearing control signaling and a physical process of the user terminal.

20. The method according to claim 4, wherein the first carrier resource is used for bearing control signaling and a physical process of the user terminal.

21. The method according to claim 5, wherein the first carrier resource is used for bearing control signaling and a physical process of the user terminal.

22. The method according to claim 6, wherein the first carrier resource is used for bearing control signaling and a physical process of the user terminal.

23. The method according to claim 7, wherein the first carrier resource is used for bearing control signaling and a physical process of the user terminal.

10. A base station, comprising:

a determination module for determining predetermined information, wherein the predetermined information comprises reserved resources for a carrier aggregation and the capability of a user terminal;

a first selection module for selecting a first carrier resource from the reserved resources according to the capability of the user terminal;

a second selection module for selecting, for the user terminal, a second carrier resource for bearing data from the resources except the reserved resources; and

an aggregation module for aggregating the first carrier resource selected by the first selection module and the second carrier resource selected by the second selection module.

11. The base station according to claim 10, wherein the aggregation module comprises:

a reception sub-module for receiving a measurement result reported by the user terminal, wherein the measurement result is the result of a measurement of the user terminal on the interference of the first and second carrier resources selected by the base station;

a determination sub-module for determining, according to the measurement result received by the reception sub-module, whether the interference of the user terminal meets the conditions for an inter-cell interference coordination in the system; and

an aggregation sub-module for aggregating the first and second carrier resources when the determination sub-module determines that the interference of the user terminal meets the conditions for an inter-cell interference coordination in the system.