METHOD TO CONTROL SLEEP MODE, AND TERMINAL AND APPARATUS THEREOF

• US 20110138209A1
• Filed: 07/07/2009
• Published: 06/09/2011
• Est. Priority Date: 07/07/2008
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute, Samsung Electronics Co. Ltd.
• Original Assignee: Electronics and Telecommunications Research Institute, Samsung Electronics Co. Ltd.
• Inventors: Kim, Kyung Soo, Lee, Namsuk, Kim, Eunkyung
• Granted Patent: US 8,606,337 B2
• Time in Patent Office: Days
• US Class Current: 713/323
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

During a listening window after a sleep window, a terminal receives a control signal that indicates existence of data corresponding to the terminal, and enters a sleep window if no data corresponding to the terminal exists.

Claims

1. A method for managing a sleep mode in a terminal, the method comprising:

negotiating a parameter of the sleep mode with a base station;

operating in a sleep window;

receiving a control signal that indicates whether data corresponding to the terminal exists during a listening window after the sleep window; and

entering into the sleep window when the control signal indicates that no data corresponding to the terminal exists, wherein the control signal includes a bitmap having a plurality of bits for designating a plurality of group identifiers (IDs), wherein the parameter includes a group ID to which the terminal belongs among the group IDs, and wherein the control signal indicates whether the data exists or not by setting a value of a bit corresponding to the group ID among the plurality of bits.

3. The method of claim 1, wherein the entering into the sleep window comprises:

determining whether the listening window is terminated; and

entering into the sleep window if the listening window is terminated.

4. The method of claim 1, further comprising, when the control signal indicates that the data corresponding to the terminal exists, receiving the data by the terminal.

8. The method of claim 1,

wherein the bit corresponding to the group ID to which the terminal belongs is set to ‘

1’

when the data corresponding to the group exists.

9. The method of claim 1, wherein the parameter further includes a frame number in which data are to be listened, and wherein the method further comprises:

entering into a sleep window when the data for the terminal is not included in the frame number.

10. The method of claim 1, wherein the parameter further includes a frame number in which data are to be listened, and wherein the method further comprises:

determining whether to enter a sleep window or to terminate the sleep mode and change to an awake mode, based on the data for the terminal included in the frame number when the data for the terminal is included in the frame number.

2. (canceled)

5-7. -7. (canceled)

11. A method for managing a sleep mode of a terminal in a base station, the method comprising:

negotiating a parameter of the sleep mode with the terminal; and

transmitting a control signal that indicates whether data of the terminal exists to a terminal in the sleep mode, wherein the control signal includes a bitmap having a plurality of bits for designating a plurality of group identifiers (IDs), wherein the parameter includes a group ID to which the terminal belongs among the group IDs, and wherein the control signal indicates whether the data exists or not by setting a value of a bit corresponding to the group ID among the plurality of bits.

12. The method of claim 11, wherein the parameter further includes a frame number in which data are to be listened.

13. The method of claim 11, wherein the bit corresponding to the group ID to which the terminal belongs is set to ‘

1’

when data corresponding to the group ID exists.

14. A terminal for managing a sleep mode, the terminal comprising:

a transmitting/receiving unit configured to negotiate a parameter of the sleep mode with a base station;

a sleep window operation unit that op rates configured to operate in a sleep window; and

a listening window operation unit configured to receive a control signal that indicates whether data corresponding to the terminal exists from a base station during a listening window after the sleep window, and enter a sleep window when the control signal indicates that the data for the terminal does not exist, wherein the control signal includes a bitmap having a plurality of bits for designating a plurality of group identifiers (IDs), wherein the parameter includes a group ID to which the terminal belongs among the group IDs, and wherein the control signal indicates whether the data exists or not by setting a value of a bit corresponding to the group ID among the plurality of bits.

15. The terminal of claim 14, wherein, when the control signal indicates that data for the terminal exists, the listening window operation unit receives the data.

17. The terminal of claim 14, wherein the bit corresponding to the group ID to which the terminal belongs is set to ‘

1’

when data corresponding to the group ID exists.

18. The terminal of claim 14, wherein the parameter further includes a frame number in which data are to be listened, and wherein the listening window operation unit comprises:

a bitmap determining unit configured to determine whether a bit corresponding to the group ID is set in the control signal; and

a frame determining unit configured to determine whether data for the terminal are included in the frame number when the bit corresponding to the group ID is set to ‘

1’

.

16. (canceled)

19-20. -20. (canceled)

22. A sleep mode managing apparatus that manages a sleep mode of a terminal, the apparatus comprising:

a determining unit configured to negotiate a parameter of a sleep mode with the terminal; and

a transmitting/receiving unit configured to transmit a control signal that indicates existence of data corresponding to the terminal to the terminal, wherein the control signal includes a bitmap having a plurality of bits for designating a plurality of group identifiers (IDs), wherein the parameter includes a group ID to which the terminal belongs among the group IDs, and wherein the control signal indicates whether the data exists or not by setting a value of a bit corresponding to the group ID among the plurality of bits.

23. The apparatus of claim 22, wherein the parameter further includes a frame number in which data that are to be listened.

24. The apparatus of claim 22, wherein the a bit corresponding to the group ID to which the terminal belongs is set to ‘

1’

when data corresponding to the group ID exists.