SLEEP MODE OPTIMIZATION FOR REDUCING BATTERY LIFE IN BROADBAND WIRELESS COMMUNICATION DEVICES

• US 20080009328A1
• Filed: 07/05/2006
• Published: 01/10/2008
• Est. Priority Date: 07/05/2006
• Status: Abandoned Application

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Narasimha, Murali
• Application Number:
  US11/428,703
• Publication Number:
  US 20080009328A1
• Time in Patent Office: Days
• US Class Current: 455/574
• 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: H04W 52/0232 according to average transmission signal activity
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method in a wireless communication terminal including transmitting a sleep mode request message (400), indicating information about a sleep mode ratio, for example, decimal and integer values, in the sleep mode request message, wherein the sleep mode ratio is formed by a ratio of successive sleep window durations, which are separated by a monitoring interval during which the wireless communication terminal monitors a channel.

Claims

1. A method in a wireless communication terminal, the method comprising:

transmitting a sleep mode request message,

indicating, in the sleep mode request message, information about a sleep mode ratio;

the sleep mode ratio is formed by a ratio of successive sleep window durations, which are separated by a monitoring interval during which the wireless communication terminal monitors a channel.

2. The method of claim 1, the sleep mode ratio is formed by a ratio of successive and unequal sleep window durations.

3. The method of claim 1, indicating in the sleep mode request message the information about the sleep mode ratio includes indicating an integer portion of the sleep mode ratio.

4. The method of claim 1, indicating in the sleep mode request message the information about the sleep mode ratio includes indicating a decimal portion of the sleep mode ratio.

5. The method of claim 1, indicating in the sleep mode request message information about the sleep mode ratio includes indicating integer and decimal portions of the sleep mode ratio.

6. A method in a wireless communication terminal, the method comprising:

operating in a first sleep mode characterized by monitoring a channel during periodic monitoring intervals separated by corresponding sleep windows wherein a ratio of successively increasing sleep window durations forms a sleep mode ratio;

exiting the first sleep mode;

operating in a second sleep mode after exiting the first sleep mode,

wherein the sleep mode ratio for the first sleep mode is different than a sleep mode ratio for the second sleep mode.

7. The method of claim 6, changing the sleep mode ratio based on a service subscribed to by the wireless communication terminal.

8. The method of claim 6, changing the sleep mode ratio based on strength of a signal received by the wireless communication terminal.

9. The method of claim 6, changing the sleep mode ratio based on an impending handover of the wireless communication terminal from one base station to another base station.

10. The method of claim 6, changing the sleep mode ratio based on an uplink data rate.

11. The method of claim 6, changing the sleep mode ratio based on a target average paging delay.

12. The method of claim 6,

transmitting a sleep mode request message,

indicating, in the sleep mode request message, sleep mode ratio information.

13. A method in a wireless communication terminal, the method comprising:

monitoring a channel during periodic monitoring intervals separated by corresponding sleep windows during sleep mode;

increasing a duration of the sleep windows from an initial duration to a maximum duration,

wherein a ratio, r, between successive sleep windows is 1<

r<

2 and r>

2.

14. The method of claim 13, increasing the duration of the sleep windows from the initial duration to the maximum duration, wherein the ratio, r, between successive sleep windows is a non-integer value.

15. The method of claim 13, the wireless communication terminal is an 802.16e terminal, operating the wireless communication terminal in a Power Save Class type I mode.

16. The method of claim 13, dynamically changing the ratio, r, between successive sleep modes.

17. A method in a wireless communication network infrastructure entity, the method comprising:

negotiating a sleep mode ratio with a wireless communication terminal operating in a sleep mode,

the sleep mode characterized by periodic monitoring intervals each separated by a corresponding sleep window wherein the sleep mode ratio is a ratio of successive sleep windows of unequal duration.

18. The method of claim 17,

determining an initial sleep mode ratio for use by the wireless communication terminal operating in a sleep mode,

negotiating an ultimate sleep mode ratio with the wireless communication terminal.

19. The method of claim 17,

queuing packet data for the wireless communication terminal,

determining the sleep mode ratio based on a queue size of the packet data.

20. The method of claim 17, determining the sleep mode ratio based on a target average paging delay.

21. The method of claim 17, determining the sleep mode ratio based on a mean packet arrival rate.

22. The method of claim 17, negotiating different sleep mode ratios with different wireless communication terminals.