System and method providing low power operation in a multimode communication device

• US 8,600,459 B2
• Filed: 01/11/2013
• Issued: 12/03/2013
• Est. Priority Date: 10/06/2005
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Ahmadreza, Behzad, Arya, Karaoguz, Jeyhan, Bennett, James D.
• Primary Examiner(s): PHUONG, DAI
• Application Number:
  US13/739,336
• Publication Number:
  US 20130122972A1
• Time in Patent Office: 326 Days
• Field of Search: 455436-4522, 455/500, 4555561-557, 455/574
• US Class Current: 455/574
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 52/0209 in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A system and method providing low-power operation in a multimode communication device. Various aspects of the present invention may, for example, include at least one radio module that is adapted to communicate in a plurality of communication modes. The at least one radio module may also be adapted to operate in at least a first power-save mode. At least one module may, for example, be adapted to analyze at least one non-informational aspect of a signal (e.g., a received radio signal) to determine whether a first communication network corresponding to a first communication mode of the plurality of communication modes might be available. The at least one module may then, for example, be adapted to determine, based at least in part on the determined availability of the first communication network, whether to operate the at least one radio module in a respective mode other than the first power-save mode.

Claims

1. A system for providing low-power operation in a multimode communication device, the system comprising:

at least one radio module operable to communicate in a plurality of communication modes and operable in at least a first power-save mode in which power is saved without determining information from signals corresponding to a first communication mode of the plurality of communication modes; and

at least one module operable to, while the at least one radio module is operating in the first power-save mode;

determine whether a first communication network corresponding to the first communication mode might be available by analyzing at least one signal characteristic; and

if it is determined that the first communication network corresponding to the first communication mode might be available, then transition operation of the at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the first communication mode, and wherein the information is decoded utilizing a portion of decoding capability that is less than a full decoding capability of the at least one module associated with the first communication mode.

2. The system of claim 1, wherein:

in the first power-save mode, power is further saved without determining information from signals corresponding to a second communication mode of the plurality of communication modes, and the at least one module is operable to, while the at least one radio module is operating in the first power-save mode;

determine whether a second communication network corresponding to the second communication mode might be available by analyzing the at least one signal characteristic; and

if it is determined that a second communication network corresponding to the second communication mode might be available then transition operation of the at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the second communication mode.

3. The system of claim 2, wherein:

the at least one radio module comprises;

a first radio module that corresponds to the first communication mode; and

a second radio module that corresponds to the second communication mode; and

the at least one module is further operable to;

transition operation of the at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the first communication mode by, at least in part, operating to transition operation of the first radio module; and

transition operation of the at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the second communication mode by, at least in part, operating to transition operation of the second radio module.

4. The system of claim 2, wherein:

the at least one radio module comprises a programmable radio module that couples to an antenna system and is operable to communicate in at least the first communication mode and the second communication mode and operable in the first power-save mode; and

the at least one module is operable to;

transition operation of the at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the first communication mode by, at least in part, operating to transition operation of the programmable radio module; and

transition operation of the at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the second communication mode by, at least in part, operating to transition operation of the programmable radio module.

5. The system of claim 1, wherein the at least one signal characteristic comprises signal presence at a particular frequency or frequency range.

6. The system of claim 1, wherein the at least one signal characteristic comprises a plurality of spectral characteristics of a received signal.

7. The system of claim 1, wherein the at least one signal characteristic comprises at least one temporal characteristic of a received signal.

8. The system of claim 1, wherein the at least one signal characteristic comprises modulation type of a received signal.

9. The system of claim 1, wherein the at least one module is operable to, after determining whether the first communication network might be available by analyzing the at least one signal characteristic, further determine whether the first communication network might be available by, at least in part, analyzing the at least one signal characteristic.

10. The system of claim 9, wherein analyzing the at least one signal characteristic comprises decoding a received signal utilizing less decoding functionality than an amount typically associated with the first communication mode.

11. in a multimode communication device operable to communicate in a plurality of communication modes, a method for providing low-power operation, the method comprising:

operating at least one radio module, which is operable in a plurality of communication modes, in a first power-save mode in which power is saved without determining information from signals corresponding to a first communication mode of the plurality of communication modes; and

while operating the at least one radio module in the first power-save mode;

analyzing at least one signal characteristic to determine whether a first communication network corresponding to the first communication mode might be available; and

if it is determined that a first communication network corresponding to the first communication mode might be available, then transitioning operation of at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the first communication mode, and wherein the information is decoded utilizing a portion of decoding capability that is less than a full decoding capability of the at least one module associated with the first communication mode.

12. The method of claim 11, wherein in the first power-save mode, power is further saved without determining information from signals corresponding to a second communication mode of the plurality of communication modes, and further comprising:

while operating the at least one radio module in the first power-save mode;

analyzing the at least one signal characteristic to determine whether a second communication network corresponding to the second communication mode might be available; and

if it is determined that a second communication network corresponding to the second communication mode might be available then transitioning operation of the at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the second communication mode.

13. The method of claim 12, wherein:

said transitioning operation of the at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the first communication mode comprises transitioning operation of a first radio module of the at least one radio module that corresponds to the first communication mode; and

said transitioning operation of the at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the second communication mode comprises transitioning operation of a second radio module of the at least one radio module that corresponds to the second communication mode.

14. The method of claim 12, wherein:

transitioning operation of the at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the first communication mode comprises transitioning operation of a programmable radio module that couples to an antenna system and is operable to communicate in at least the first communication mode and the second communication mode; and

transitioning operation of the at least one radio module from the first power-save mode to an operating mode in which information is determined from signals corresponding to the second communication mode comprises transitioning operation of the programmable radio module.

15. The method of claim 11, wherein the at least one signal characteristic comprises signal presence at a particular frequency or frequency range.

16. The method of claim 11, wherein the at least one signal characteristic comprises a plurality of spectral characteristics of a received signal.

17. The method of claim 11, wherein the at least one signal characteristic comprises at least one temporal characteristic of a received signal.

18. The method of claim 11, wherein the at least one signal characteristic comprises modulation type of a received signal.

19. The method of claim 11, further comprising, after determining whether the first communication network might be available by analyzing the at least one signal characteristic, further determining whether the first communication network might be available by, at least in part, analyzing the at least one signal characteristic.

20. The method of claim 19, wherein analyzing the at least one signal characteristic comprises decoding a received signal utilizing less decoding functionality than an amount typically associated with the first communication mode.