METHOD FOR CONTROLLING POWER SAVING MODE IN GROUP COMMUNICATION

• US 20120087287A1
• Filed: 09/29/2011
• Published: 04/12/2012
• Est. Priority Date: 09/29/2010
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: KIM, Sung Kyung, Chang, Sung Cheol, Kim, Eunkyung, Lee, Hyun, Yoon, Chul Sik
• Granted Patent: US 8,824,348 B2
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method of controlling power saving modes of a plurality of terminals joining in a group communication by a base station is provided. The base station establishes a group call connection with the plurality of terminals, and establishes a same power saving mode pattern for the plurality of terminals.

Claims

1. A method of controlling power saving modes of a plurality of terminals joining in a group communication by a base station, the method comprising:

establishing a group call connection with the plurality of terminals; and

establishing a same power saving mode pattern for the plurality of terminals.

2. The method of claim 1, wherein the power saving mode pattern comprises a power saving cycle having a listening window and a sleep window.

3. The method of claim 1, wherein the power saving mode pattern is established when the group call connection is established.

4. The method of claim 1, wherein establishing the power saving mode pattern comprises transmitting messages including information on the power saving mode pattern to the plurality of terminals by unicast, respectively.

5. The method of claim 1, wherein establishing the power saving mode pattern comprises transmitting a message including information on the power saving mode pattern to the plurality of terminals by multicast.

6. The method of claim 1, further comprising:

receiving a request message for establishing a power saving mode pattern that is different from the same power saving mode pattern, from a predetermined terminal of the plurality of terminals; and

transmitting a response message including information on the different power saving mode pattern to the predetermined terminal,

wherein the different power saving mode pattern is applied to the predetermined terminal.

7. The method of claim 1, further comprising:

receiving a request message for changing the power saving mode pattern from a predetermined terminal of the plurality of terminals; and

transmitting a response message including information on a changed power saving mode pattern to the plurality of terminals by multicast.

8. The method of claim 1, further comprising allocating a same identifier to the plurality of terminals, for controlling power saving modes of the plurality of terminals.

9. The method of claim 8, further comprising transmitting a traffic indication message to the plurality of terminals when traffic to be transmitted to the plurality of terminals exists,

wherein the traffic indication message comprises the identifier.

10. A method of controlling a power saving mode by a terminal joining in a group communication, the method comprising:

establishing a group call connection with a base station;

establishing a same power saving mode pattern as other terminals joining in the group communication; and

entering a power saving mode according to the power saving mode pattern.

11. The method of claim 10, further comprising entering the power saving mode when other service connection is released and no burst for the group call exists.

12. The method of claim 10, wherein the power saving mode pattern comprises a power saving cycle having a listening window and a sleep window.

13. The method of claim 10, wherein the power saving mode pattern is established when the group call connection is established.

14. The method of claim 10, wherein establishing the power saving mode pattern comprises receiving a messages including information on the power saving mode pattern from the base station.

15. The method of claim 10, further comprising:

transmitting a request message for establishing a power saving mode pattern that is different from the same power saving mode pattern, to the base station; and

receiving a response message including information on the different power saving mode pattern from the base station,

wherein the terminal operates with the different power saving mode pattern in the power saving mode.

16. The method of claim 10, further comprising:

transmitting a request message for changing the power saving mode pattern to the base station; and

receiving a response message including information on a changed power saving mode pattern from the base station.

17. The method of claim 16, wherein the terminal is a terminal with a highest priority among a plurality of terminals.

18. The method of claim 10, further comprising receiving an identifier from the base station, the identifier being equally allocated to a plurality of terminals for controlling power saving modes of the plurality of terminals.

19. The method of claim 18, further comprising:

receiving a traffic indication message from the base station in a listening window of the power saving mode; and

checking whether the identifier exists in the traffic indication message.

20. The method of claim 10, wherein the power saving mode pattern comprises a power saving cycle having a listening window and a sleep window, and

wherein entering the power saving mode comprises setting a common window of a sleep window of a power saving mode for other service and the sleep window according to the power saving mode pattern as a new sleep window when the other service is released.