APPARATUS AND METHOD FOR OPTIONALLY USING SECONDARY FREQUENCY ASSIGNMENT IN A WIRELESS COMMUNICATION SYSTEM USING MULTIPLE BAND

• US 20100040011A1
• Filed: 08/17/2009
• Published: 02/18/2010
• Est. Priority Date: 08/18/2008
• Status: Active Grant

• Current Assignee: Unwired Planet International Limited (Brevet Capital)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cho, Jae-Hee, Kang, Hyun-Jeong, Son, Jung-Je, Roh, Won-Il, Jun, Byung-Wook
• Granted Patent: US 8,149,777 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 52/0261 managing power supply demand, e.g. depending on battery level
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 76/34 Selective release of ongoing connections
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A broadband wireless communication system using multiple bands is provided. A method includes determining to stop using a first Secondary (S)-Frequency Assignment (FA) of one or more S-FAs while communicating with a correspondent node over a Primary (P)-FA and the one or more S-FAs, sending a first message which requests to suspend the first S-FA, to the correspondent node, communicating over at least one FA excluding the first S-FA, and when resumption of the first S-FA is determined, sending a second message which requests to resume the first S-FA.

Claims

1. A method for operating a wireless access node in a wireless communication system using a plurality of Frequency Assignments (FAs), the method comprising:

determining to stop using a first Secondary (S)-FA of one or more S-FAs while communicating with a correspondent node over a Primary (P)-FA and the one or more S-FAs;

sending a first message which requests to suspend the first S-FA, to the correspondent node;

communicating over at least one FA excluding the first S-FA; and

when resumption of the first S-FA is determined, sending a second message which requests to resume the first S-FA.

2. The method of claim 1, further comprising:

determining to suspend the first S-FA when a remaining battery capacity of a mobile station using the first S-FA is less than a threshold.

3. The method of claim 1, further comprising:

determining to suspend the first S-FA when a load of the first S-FA is greater than a threshold.

4. The method of claim 1, further comprising:

determining to suspend the first S-FA when a signal strength measurement value of the first S-FA is less than a threshold.

5. The method of claim 1, wherein the first message comprises at least one of indication information and off duration of the first S-FA, and

the indication information comprises one of frequency information of the first S-FA, an index of the first S-FA, and an S-FA bitmap representing the first S-FA.

6. The method of claim 5, wherein the wireless access node comprises a base station, and

the first message comprises information requesting to use an FA other than the first S-FA, and indication information of the other FA.

7. The method of claim 1, wherein the wireless access node comprises a mobile station, and

the first message comprises part of a sleep request message which requests a sleep mode entrance of the mobile station.

8. The method of claim 1, wherein the wireless access node comprises a base station, and

the first message comprises part of a sleep response message which informs of approval or disapproval on a sleep mode entrance request of a mobile station.

9. The method of claim 1, further comprising:

receiving a third message which comprises a response for the resumption request of the first S-FA.

10. The method of claim 9, wherein the wireless access node comprises a mobile station, and

the third message comprises at least one of information allowing the resumption of the first S-FA, information disallowing the resumption of the first S-FA, and information allowing use of an FA other than the first S-FA.

11. The method of claim 9, further comprising:

when the third message comprises at least one of information allowing the resumption of the first S-FA and information allowing use of an FA other than the first S-FA, preparing to use at least one of the first S-FA and the other FA; and

when the preparation is completed, sending an S-FA readiness indicator.

12. A method for operating a wireless access node in a wireless communication system using a plurality of Frequency Assignments (FAs), the method comprising:

receiving a first message which requests to stop using a first S-FA, which comprises one of one or more S-FAs, from a correspondent node while communicating with the correspondent node over a Primary (P)-FA and the one or more S-FAs;

communicating over at least one FA excluding the first S-FA;

receiving a second message which requests to resume the use of the first S-FA, from the correspondent node; and

communicating over at least one FA including the first S-FA.

13. The method of claim 12, wherein the first message comprises at least one of indication information and off duration of the first S-FA, and

the indication information comprises one of frequency information of the first S-FA, an index of the first S-FA, and an S-FA bitmap representing the first S-FA.

14. The method of claim 13, wherein the wireless access node comprises a mobile station, and

the first message comprises information requesting to use an FA other than the first S-FA, and indication information of the other FA.

15. The method of claim 12, wherein the wireless access node comprises a base station, and

the first message comprises part of a sleep request message which requests a sleep mode entrance of a mobile station.

16. The method of claim 12, wherein the wireless access node comprises a mobile station, and

the first message comprises part of a sleep response message which informs of approval or disapproval on a sleep mode entrance request of the mobile station.

17. The method of claim 12, further comprising:

sending a third message which comprises a response for the use resumption request of the first S-FA.

18. The method of claim 17, wherein the wireless access node comprises a base station, and

the third message comprises at least one of information allowing the resumption of the first S-FA, information disallowing the resumption of the first S-FA, and information allowing use of an FA other than the first S-FA.

19. The method of claim 17, wherein the wireless access node comprises a mobile station, and further comprising:

after sending the third message, preparing to use the first S-FA; and

when the preparation is completed, sending an S-FA readiness indicator.

20. The method of claim 12, wherein the wireless access node comprises a mobile station, and further comprising:

before sending a third message, preparing to use the first S-FA; and

when the preparation is completed, sending the third message to response for the use resumption request of the first S-FA and to inform that the usage resumption of the first S-FA may begin.

21. An apparatus for operating a wireless access node in a wireless communication system using a plurality of Frequency Assignments (FAs), the apparatus comprising:

a controller for determining to stop using a first Secondary (S)-FA of one or more S-FAs while communicating with a correspondent node over a Primary (P)-FA and the one or more S-FAs; and

a transmitter for sending a first message which requests to suspend the first S-FA to the correspondent node,

wherein the controller controls to communicate over at least one FA excluding the first S-FA, and

when resumption of the first S-FA is determined, the transmitter sends a second message which requests to resume the first S-FA.

22. The apparatus of claim 21, wherein the first S-FA is suspended when a remaining battery capacity of a mobile station using the first S-FA is less than a threshold.

23. The apparatus of claim 21, wherein the first S-FA is suspended when a load of the first S-FA is greater than a threshold.

24. The apparatus of claim 21, wherein the first S-FA is suspended when a signal strength measurement value of the first S-FA is less than a threshold.

25. The apparatus of claim 21, wherein the first message comprises at least one of indication information and off duration of the first S-FA, and

the indication information comprises one of frequency information of the first S-FA, an index of the first S-FA, and an S-FA bitmap representing the first S-FA.

26. The apparatus of claim 25, wherein the wireless access node comprises a base station, and

the first message comprises information requesting to use an FA other than the first S-FA, and indication information of the other FA.

27. The apparatus of claim 21, wherein the wireless access node comprises a mobile station, and

the first message comprises part of a sleep request message which requests a sleep mode entrance of the mobile station.

28. The apparatus of claim 21, wherein the wireless access node comprises a base station, and

the first message comprises part of a sleep response message which informs of approval or disapproval on a sleep mode entrance request of a mobile station.

29. The apparatus of claim 21, further comprising:

a receiver for receiving a third message which comprises a response for the resumption request of the first S-FA.

30. The apparatus of claim 29, wherein the wireless access node comprises a mobile station, and

the third message comprises at least one of information allowing the resumption of the first S-FA, information disallowing the resumption of the first S-FA, and information allowing use of an FA other than the first S-FA.

31. The apparatus of claim 29, wherein, when the third message comprises at least one of information allowing the resumption of the first S-FA and information allowing use of an FA other than the first S-FA, the controller prepares to use at least one of the first S-FA and the other FA, and

when the preparation is completed, the transmitter sends an S-FA readiness indicator.

32. An apparatus for operating a wireless access node in a wireless communication system using a plurality of Frequency Assignments (FAs), the apparatus comprising:

a receiver for receiving a first message which requests to stop using a first Secondary (S)-FA, which is one of one or more S-FAs, from a correspondent node while communicating with the correspondent node over a Primary (P)-FA and the one or more S-FAs; and

a controller for controlling to communicate over at least one FA excluding the S-FA,

wherein the receiver receives a second message which requests to resume the use of the first S-FA, from the correspondent node, and

the controller controls to communicate over at least one FA including the first S-FA.

33. The apparatus of claim 32, wherein the first message comprises at least one of indication information and off duration of the first S-FA, and

the indication information comprises one of frequency information of the first S-FA, an index of the first S-FA, and an S-FA bitmap representing the first S-FA.

34. The apparatus of claim 33, wherein the wireless access node comprises a mobile station, and

the first message comprises information requesting to use an FA other than the first S-FA, and indication information of the other FA.

35. The apparatus of claim 32, wherein the wireless access node comprises a base station, and

the first message comprises part of a sleep request message which requests a sleep mode entrance of a mobile station.

36. The apparatus of claim 32, wherein the wireless access node comprises a mobile station, and

the first message comprises part of a sleep response message which informs of approval or disapproval on a sleep mode entrance request of the mobile station.

37. The apparatus of claim 32, further comprising:

a transmitter for sending a third message which comprises a response for the resumption request of the first S-FA.

38. The apparatus of claim 37, wherein the wireless access node comprises a base station, and

the third message comprises at least one of information allowing the resumption of the first S-FA, information disallowing the resumption of the first S-FA, and information allowing use of an FA other than the first S-FA.

39. The apparatus of claim 37, wherein the wireless access node comprises a mobile station,

the controller prepares to use the first S-FA after the third message is transmitted, and

the transmitter sends an S-FA readiness indicator when the preparation is completed.

40. The apparatus of claim 32, wherein the wireless access node comprises a mobile station, and further comprising:

The controller prepares to use the first S-FA before sending a third message; and

The transmitter sends the third message to response for the use resumption request of the first S-FA and to inform that the usage resumption of the first S-FA may begin, when the preparation is completed.