Method, base station and mobile station for tdd operation in a communication system

• US 20060221872A1
• Filed: 02/11/2004
• Published: 10/05/2006
• Est. Priority Date: 02/11/2003
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: IPWireless Inc. (NVIDIA Corporation)
• Inventors: Cheung, Joseph Chung Shing, Jones, William John, Jones, Alan Edward
• Granted Patent: US 7,890,113 B2
• Time in Patent Office: Days
• US Class Current: 370/276
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence
• CPC Class Codes: H04J 4/00 Combined time-division and frequency-division multiplex systems H04J13/00 takes precedence ; data transmission H04L5/26; telemetry G08C15/00
• CPC Class Codes: H04L 5/1438 Negotiation of transmission parameters prior to communication modified according to link quality H04L1/0001
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 16/04 Traffic adaptive resource partitioning
• CPC Class Codes: H04W 16/06 Hybrid resource partitioning, e.g. channel borrowing

Abstract

A method, NodeB (320) and User Equipment (330) for TDD operation in a communication system operating in TDD mode in a frequency band allocated for FDD operation. Preferably, operation is in TDD uplink and downlink mode in a first frequency band designated or normally used for FDD uplink communication, and in TDD downlink-only mode in a second frequency band designated or normally used for FDD downlink communication. The invention provides the following advantages: Provides a flexible method to deploy a time division duplex architecture in frequency division duplex spectrum. Allows flexible use of system capacity by adjusting the uplink and downlink capacity split. Removes previous FDD duplex restrictions.

Claims

1. A method for TDD operation in a communication system, comprising:

operating in TDD mode in a frequency band allocated for FDD operation.

2. The method of claim 1 wherein the step of operating in TDD mode comprises:

operating in TDD uplink and downlink mode in a first frequency band allocated for FDD uplink communication, and operating in TDD downlink-only mode in a second frequency band allocated for FDD downlink communication.

3. The method of claim 2 further comprising employing common signalling for the first and second frequency bands.

4. The method of claim 1, 2 or 3 further comprising messaging between a network and a mobile station of the system to establish whether the mobile station is capable of operating in TDD mode in a frequency band allocated for FDD operation and accordingly communicating between the network and the mobile station.

5. The method of any preceding claim further comprising managing a plurality of TDD frequencies as a single resource.

6. The method of any preceding claim wherein the step of operating in TDD mode in a frequency band allocated for FDD operation comprises increasing uplink capacity by increasing the allocation of uplink time slots in FDD uplink spectrum.

7. The method of any preceding claim wherein the system comprises a 3GPP system.

8. A base station for TDD operation in a communication system, the base station comprising:

means for operating in TDD mode in a frequency band allocated for FDD operation.

9. The base station of claim 8 wherein the means for operating in TDD mode comprises:

means for operating in TDD uplink and downlink mode in a first frequency band allocated for FDD uplink communication; and

means for operating in downlink-only mode in a second frequency band allocated for FDD downlink communication.

10. The base station of claim 9 further comprising means for common signalling for the first and second frequency bands.

11. The base station of claim 8, 9 or 10 further comprising means for messaging with a mobile station of the system to establish whether the mobile station is capable of operating in TDD mode in a frequency band allocated for FDD operation and accordingly communicating with the mobile station.

12. The base station of any one of claims 8-11 further comprising means for managing a plurality of TDD frequencies as a single resource.

13. The base station of any one of claims 8-12 wherein the means for operating in TDD mode in a frequency band allocated for FDD operation comprises means for increasing uplink capacity by increasing the allocation of uplink time slots in FDD uplink spectrum.

14. The base station of any one claims 8-13 wherein the system comprises a 3GPP system and the base station comprises a NodeB.

18. The mobile station of claim 14, 15 or 16 further comprising means for messaging with a network of the system to establish whether the mobile station is capable of operating in TDD mode in a frequency band allocated for FDD operation and accordingly communicating with the network.

15. A mobile station station for TDD operation in a communication system, the mobile station comprising:

means for operating in TDD mode in a frequency band allocated for FDD operation.

16. The mobile station of claim 15 wherein the means for operating in TDD mode comprises:

means for operating in TDD uplink and downlink mode in a first frequency band allocated for FDD uplink communication; and

means for operating in downlink-only mode in a second frequency band allocated for FDD downlink communication.

17. The mobile station of claim 16 further comprising means for common signalling for the first and second frequency bands.

19. The mobile station of claim 15 wherein means for operating in the first frequency band and means for operating in the second frequency band are arranged to operate simultaneously.

20. The mobile station of any one of claims 15-19 wherein the means for operating in TDD mode in a frequency band allocated for FDD operation comprises means for increasing uplink capacity by increasing the allocation of uplink time slots in FDD uplink spectrum.

21. The mobile station of any one claims 15-20 wherein the system comprises a 3GPP system and the base station comprises User Equipment.