METHOD OF DCR OPERATION IN A BROADBAND WIRELESS COMMUNICATION SYSTEM

• US 20100304777A1
• Filed: 05/24/2010
• Published: 12/02/2010
• Est. Priority Date: 05/24/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: KIM, Yong Ho, RYU, Ki Seon, LEE, Jin
• Granted Patent: US 8,412,193 B2
• Time in Patent Office: Days
• US Class Current: 455/517
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 60/06 De-registration or detaching
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present invention relates to a broadband wireless access system, and more particularly, to a method for a mobile station to save power for prescribed duration without performing a paging procedure and apparatus therefor. According to one embodiment of the present invention, a method of a DCR (deregistration with content retention) mode operation of a mobile station in a broadband wireless access system includes transmitting a first message including a first code indicating an entry request at the DCR mode to a base station, receiving a second message including a second code indicating whether to allow the entry request from the base station, and if the second code is set to a value indicating an allowance of the entry request, operating in the DCR mode while a preset timer is valid.

Claims

1. A method of a DCR (deregistration with content retention) mode operation of a mobile station in a broadband wireless access system, the method comprising:

transmitting a first message including a first code indicating a DCR mode entry request to a base station;

receiving a second message including a second code indicating whether to allow the entry request from the base station; and

if the second code is set to a value indicating an allowance of the entry request, operating in the DCR mode while a preset timer is valid.

2. The method of claim 1, further comprising transmitting a third message including a third code indicating a network re-entry request and a first identifier for identifying the mobile station in the DCR mode to an arbitrary base station in a network including the base station.

3. The method of claim 2, wherein the first identifier is allocated to the mobile station via the second message or a registration response (AAI_REG-RSP) message.

4. The method of claim 2, wherein the third message is a ranging request (AAI_RNG-REQ) message and wherein the third code indicating the network re-entry request is a ranging purpose code set to 0x06.

5. The method of claim 1, wherein the first message is a deregistration request (AAI_DREG-REQ) message, wherein the first code indicating the entry request is a deregistration request code (Deregistration_Request_Code) set to 0x04, wherein the second message is a deregistration response (AAI_DREG-RSP) message, and wherein the second code indicating the allowance of the entry request is an action code set to 0x08.

6. The method of claim 1, wherein the first message is a ranging request (AAI_RNG-REQ) message transmitted by the mobile station in an idle mode, wherein the first code indicating the entry request is a ranging purpose code set to 0x05, wherein the second message is a ranging response (AAI_RNG-RSP) message, and wherein the second code indicating the allowance of the entry request is a location update response code set to 0x04.

7. The method of claim 1, wherein the first message further includes context information of the mobile station wherein retention of the context information is requested by the mobile station.

8. A method of a DCR (deregistration with content retention) mode operation of a base station in a broadband wireless access system, the method comprising:

receiving a first message including a first code indicating a DCR mode entry request from a mobile station;

determining whether to allow the entry request;

if the entry request is allowed, delivering a context of the mobile station to a prescribed network entity; and

transmitting a second message including a second code indicating an allowance of the entry request to the mobile station.

9. The method of claim 8, further comprising receiving a third message including a third code indicating a network re-entry request and a first identifier for identifying the mobile station in the DCR mode from the mobile station.

10. The method of claim 9, wherein the first identifier is allocated to the mobile station via the second message or a registration response (AAI_REG-RSP) message.

11. The method of claim 9, wherein the second message further includes a second identifier for identifying a network entity retaining context information of the mobile station.

12. The method of claim 8, wherein the first message is a ranging request (AAI_RNG-REQ) message transmitted by the mobile station in an idle mode and wherein the method further comprises the step of updating a paging cycle and paging offset bit value applied to the idle mode into ‘

0’

.

13. The method of claim 8, wherein the first message further includes context information of the mobile station wherein retention of the context information is requested by the mobile station.

14. A mobile station which operates in a broadband wireless access system, the mobile station comprising:

a processor; and

a radio communication (RF) module configured to transceive a radio signal externally under the control of the processor,

wherein the processor controls the wireless communication module to transmit a first message including a first code indicating a DCR mode entry request to a base station and wherein when a second message including a second code indicating whether to allow the entry request is received from the base station, if the second code indicates an allowance of the entry request as a result of determining whether to allow the entry request, the processor controls to operate in the DCR mode while a preset timer is valid.

15. The mobile station of claim 14, wherein the processor controls the wireless communication module to send a third message including a third code indicating a network re-entry request and a first identifier for identifying the mobile station in the DCR mode to an arbitrary base station in a network including the base station.

16. The mobile station of claim 15, wherein the first identifier is obtained by the mobile station via the second message or a registration response (AAI_REG-RSP) message.

17. The mobile station of claim 15, wherein the third message is a ranging request (AAI_RNG-REQ) message and wherein the processor sets the third code to a ranging purpose code set to 0x06.

18. The mobile station of claim 14, wherein the first message is a deregistration request (AAI_DREG-REQ) message, wherein the second message is a deregistration response (AAI_DREG-RSP) message, wherein the processor sets the first code to a deregistration request code (Deregistration_Request_Code) set to 0x04, and wherein the processor sets the second code to an action code set to 0x08.

19. The mobile station of claim 14, wherein the first message is a ranging request (AAI_RNG-REQ) message sent by the mobile station in an idle mode, wherein the second message is a ranging response (AAI_RNG-RSP) message, wherein the processor sets the first code to a ranging purpose code set to 0x05, and wherein the processor sets the second code to an location update response code set to 0x04.

20. The mobile station of claim 14, wherein the processor enables context information of the mobile station to be included in the first message and wherein retention of the context information is requested by the mobile station.