APPARATUS AND METHOD FOR UPDATING SLPID OF A TERMINAL OPERATING IN SLEEP MODE IN A BROADBAND WIRELESS COMMUNICATION SYSTEM

• US 20120099500A1
• Filed: 10/21/2011
• Published: 04/26/2012
• Est. Priority Date: 10/21/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Giwon, Ryu, Kiseon, Yuk, Youngsoo
• Granted Patent: US 9,055,532 B2
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present disclosure relates to an operation method of a base station for supporting a sleep mode in a broadband mobile communication system, and the method may include transmitting a sleep response message containing sleep identification information to the terminal during a sleep mode entry process; transmitting a traffic indication message containing updated sleep identification information to the terminal during a listening window when the sleep identification information is updated; receiving a traffic indication request message from the terminal subsequent to the listening window; and transmitting a traffic indication response message containing the updated sleep identification information to the terminal.

Claims

1. A method for a base station to support a sleep mode in a broadband mobile communication system, the method comprising:

transmitting a sleep response message comprising sleep identification information to a terminal during a sleep mode entry process;

transmitting a traffic indication message comprising an updated sleep identification information to the terminal during a listening window when the sleep identification information is updated;

receiving a traffic indication request message from the terminal; and

transmitting a traffic indication response message comprising the updated sleep identification information to the terminal.

2. The method of claim 1, wherein the sleep identification information is an identifier used to distinguish a terminal in a sleep mode.

3. The method of claim 1, wherein the updated sleep identification information comprises a pair of a sleep identifier (OLD SLPID) used by the terminal and a new sleep identifier (NEW SLPID) substituting for the sleep identifier used by the terminal.

4. The method of claim 3, wherein the traffic indication response message comprising the new sleep identification information is transmitted when the sleep identification information is updated.

5. The method of claim 1, wherein the sleep identification information is updated after entering a sleep mode.

6. The method of claim 1, wherein the sleep identification information is updated when occurring an empty sleep identifier which is not assigned to any terminal among sleep identifiers assigned to a sleep identifier group.

7. The method of claim 1, wherein the traffic indication request message is transmitted subsequent to the listening window.

8. A method for a terminal to perform a sleep mode in a broadband mobile communication system, the method comprising:

receiving a sleep response message comprising sleep identification information from a base station during a sleep mode entry process;

transmitting a traffic indication request message to the base station subsequent to the listening window when a traffic indication message and unicast data are not received from the base station during the listening window;

receiving a traffic indication response message comprising new sleep identification information substituting for the sleep identification information from the base station; and

updating the sleep identification information to the new sleep identification information based on the received traffic indication response message.

9. The method of claim 8, further comprising:

checking whether there is a traffic to be transmitted to the terminal based on the updated sleep identification information after receiving a traffic indication message during a sleep mode listening window subsequent to the listening window.

10. The method of claim 8, wherein the traffic indication message further comprises the updated sleep identification information when the sleep identification information is updated.

11. The method of claim 8, wherein the sleep identification information is an identifier used to distinguish a terminal in a sleep mode.

12. The method of claim 10, wherein the updated sleep identification information comprises a pair of a sleep identifier (OLD SLPID) used by the terminal and a new sleep identifier (NEW SLPID) substituting for the sleep identifier used by the terminal.

13. The method of claim 8, wherein the traffic indication response message comprising the new sleep identification information is transmitted when the sleep identification information is updated.

14. A terminal for performing a sleep mode in a broadband wireless communication system, the terminal comprising:

a central processing unit;

a memory unit; and

a radio frequency (RF) unit,

wherein the radio frequency unit comprises;

a transmission module configured to transmit radio signals;

a reception module configured to receive radio signals; and

a radio frequency controller configured to control the reception module for receiving a sleep response message comprising sleep identification information from a base station during a sleep mode entry process, and control the transmission module for transmitting a traffic indication request message to the base station subsequent to the listening window when a traffic indication message and unicast data are not received from the base station during the listening window, and control the reception module for receiving a traffic indication response message comprising new sleep identification information substituting for the sleep identification information from the base station,

wherein the central processing unit extracts the new sleep identification information from the received traffic indication response message to update a sleep identifier previously assigned to the terminal to the extracted new sleep identification information.

15. The terminal of claim 14, wherein the sleep identification information is an identifier used to distinguish a terminal in a sleep mode.

16. The terminal of claim 14, wherein the new sleep identification information is contained in the traffic indication response message when the sleep identification information is updated.

17. A base station for supporting a sleep mode in a broadband wireless communication system, the base station comprising:

a central processing unit;

a memory unit; and

a radio frequency (RF) unit,

wherein the radio frequency unit comprises;

a transmission module configured to transmit radio signals;

a reception module configured to receive radio signals; and

a radio frequency controller configured to control the transmission module for transmitting a sleep response message containing sleep identification information to a terminal during a sleep mode entry process and transmitting a traffic indication message comprising updated sleep identification information to the terminal during a listening window when the sleep identification information is updated, and control the transmission module for transmitting a traffic indication response message comprising the updated sleep identification information to the terminal when a traffic indication request message is received from the terminal through the reception module.