Utilizing guard band between FDD and TDD wireless systems

• US 20070286156A1
• Filed: 06/06/2007
• Published: 12/13/2007
• Est. Priority Date: 06/06/2006
• Status: Abandoned Application

• Current Assignee: SR Telecom & Co., S.E.C. (Bonterra Energy Corp.)
• Original Assignee: SR Telecom Inc. (Bonterra Energy Corp.)
• Inventors: Gormley, Eamonn, Pralle, Chad
• Application Number:
  US11/810,551
• Publication Number:
  US 20070286156A1
• Time in Patent Office: Days
• US Class Current: 370/350
• CPC Class Codes: H04B 7/2615 using hybrid frequency-time division multiple access [FDMA-TDMA]
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 56/002 Mutual synchronization
• CPC Class Codes: H04W 72/00 Local resource management

Abstract

A wireless system and method includes a frequency division duplex (FDD) system configured to provide at least a first FDD channel operating within a first frequency band. A time division duplex (TDD) system is configured to provide at least a first TDD channel operating within a second frequency band. The first frequency band and the second frequency band are separated by a third frequency band, and a half-duplex frequency division duplex (H-FDD) system is configured to provide at least a first H-FDD channel operating within the third frequency band. A transmission of the first H-FDD channel may be synchronized with one of an uplink transmission and a downlink transmission of the first TDD channel.

Claims

1. A wireless network comprising:

a frequency division duplex (FDD) system configured to provide at least a first FDD channel operating within a first frequency band;

a time division duplex (TDD) system configured to provide at least a first TDD channel operating within a second frequency band, the first frequency band and the second frequency band being separated by a third frequency band; and

a half-duplex frequency division duplex (H-FDD) system configured to provide at least a first H-FDD channel operating within the third frequency band, a transmission of the first H-FDD channel being synchronized with one of an uplink transmission or a downlink transmission of the TDD channel.

2. The wireless network of claim 1, wherein the FDD system is further configured to provide at least a second FDD channel operating within a fourth frequency band separated from the second frequency band by a fifth frequency band, and wherein the H-FDD system is further configured to provide at least a second H-FDD channel operating within the fifth frequency band.

3. The wireless network of claim 2, wherein the first FDD channel includes a wireless uplink channel and the second FDD channel includes a wireless downlink channel.

4. The wireless network of claim 2, wherein the first H-FDD channel includes a wireless uplink channel and the second H-FDD channel includes a wireless downlink channel.

5. The wireless network of claim 1, wherein the first H-FDD channel includes a wireless uplink channel, and the uplink transmission of the first TDD channel is synchronized with the transmission of the first H-FDD channel.

6. The wireless network of claim 1, wherein the first H-FDD channel includes a wireless downlink channel, and the downlink transmission of the first TDD channel is synchronized with the transmission of the first H-FDD channel.

7. A method for sharing a frequency spectrum between multiple collocated wireless systems comprising:

providing at least a first frequency division duplex (FDD) channel operating within a first frequency band;

providing at least a first time division duplex (TDD) channel operating within a second frequency band, the first frequency band and the second frequency band being separated by a third frequency band; and

providing at least a first half-duplex frequency division duplex (H-FDD) channel operating within the third frequency band, a transmission of the first H-FDD channel being synchronized with one of a an uplink transmission or a downlink transmission of the TDD channel;

the first FDD channel, the first TDD channel, and the first H-FDD channel being collocated with one another.

8. The method of claim 7, further comprising providing a second FDD channel operating within a fourth frequency band, the fourth frequency band separated from the second frequency band by a fifth frequency band, and providing a second H-FDD channel operating within the fifth frequency band.

9. The method of claim 8, wherein the first FDD channel includes an FDD wireless uplink channel and the second FDD channel includes a FDD wireless downlink channel.

10. The method of claim 8, wherein the first H-FDD channel includes an H-FDD wireless uplink channel and the second H-FDD channel includes an H-FDD wireless downlink channel.

11. The method of claim 7, wherein the first H-FDD channel includes a wireless uplink channel, the method further including synchronizing the uplink transmission of the first TDD channel and the transmission of the first H-FDD channel.

12. The method of claim 7, wherein the first H-FDD channel includes a wireless downlink channel, the method further including synchronizing the downlink transmission of the TDD channel and the transmission of the first H-FDD channel.

13. A method for implementing a time division duplex (TDD) wireless system in a wireless network including a frequency division duplex (FDD) wireless system, the method comprising:

replacing a first frequency band of a the FDD wireless system with at least a first TDD wireless channel, including leaving a first and a second guard band separating the first TDD wireless channel and at least a first and a second adjacent FDD wireless channel;

deploying a half-duplex frequency division duplex (H-FDD) system in the first and second guard bands.

14. The method of claim 13, wherein replacing the first frequency band of the FDD wireless system includes replacing the first frequency band with at least one H-FDD wireless channel of the H-FDD system, and replacing at least a portion of the at least one H-FDD wireless channel with at least the first TDD wireless channel, wherein the H-FDD system is deployed in the first and second guard bands.

15. The method of claim 13, further including expanding the TDD wireless channel to eliminate the first and second FDD wireless channels.

16. The method of claim 13, wherein the first FDD wireless channel includes an uplink channel, and the H-FDD system deployed in the first guard band includes an uplink channel adjacent to the first FDD wireless channel, and the second FDD wireless channel includes a downlink channel, and the H-FDD system deployed in the second guard band includes a downlink channel adjacent to the second FDD wireless channel.

17. The method of claim 13, wherein the H-FDD system includes an H-FDD uplink channel, transmission of the H-FDD uplink channel being synchronized with an uplink transmission of the first TDD wireless channel.

18. The method of claim 13, wherein the H-FDD system includes an H-FDD downlink channel, transmission of the H-FDD downlink channel being synchronized with a downlink transmission of the first TDD wireless channel.

19. A wireless system comprising:

a half-duplex frequency division duplex (H-FDD) system configured to provide at least a first H-FDD channel, a transmission of the first H-FDD channel being configured to be synchronized with one of an uplink transmission or a downlink transmission of a TDD channel of a TDD wireless system.

20. The wireless system of claim 19, wherein the first H-FDD channel is an uplink channel, and the transmission of the first H-FDD channel is configured to be synchronized with the uplink transmission of the TDD wireless system.

21. The wireless system of claim 19, wherein the first H-FDD channel is a downlink channel, and the transmission of the first H-FDD channel is configured to be synchronized with the downlink transmission of the TDD wireless system.