Idle mode power consumption reduction in wireless communications

• US 9,277,499 B2
• Filed: 07/22/2013
• Issued: 03/01/2016
• Est. Priority Date: 02/25/2009
• Status: Active Grant

• Current Assignee: Bell Northern Research, LLC (Hilco Inc. (d/b/a Hilco Global))
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Paliwal, Vikas, Qiu, Xiaoxin, Gong, Zhijun, Mehio, Rami, Visvanath, Arun Kumar
• Primary Examiner(s): Acolatse, Kodzovi
• Application Number:
  US13/947,182
• Publication Number:
  US 20130301507A1
• Time in Patent Office: 953 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 2201/7071 with dynamic control of receiver resources
• CPC Class Codes: H04W 52/0209 in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/028 switching on or off only a part of the equipment circuit blocks
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Idle mode power consumption reduction in wireless communications. Within a wireless communication device that is operative to communicate with any one of a number of servicing cells, paging broadcasts from more than one of these servicing cells are received and undergo only a limited amount of processing before being stored for use in subsequent processing that may be performed later. This partitioned processing allows the turning off of certain components that are not needed and/or no longer needed for determining the system frame numbers associated with various servicing cells to effectuate timing synchronization. Certain modules within such a wireless communication device may perform processing using the full capabilities of the wireless communication device to generate initially processed signal, and then after such signals are stored, then only partial processing capability of the wireless communication device may be employed, even though perhaps being slower, to complete the processing.

Claims

1. A wireless communication device comprising:

a memory;

an analog front end (AFE) configured to generate a first demodulated signal based on a first paging broadcast from a first servicing cell for storage in the memory and a second demodulated signal based on a second paging broadcast from a second servicing cell for storage in the memory;

a processor that includes;

a hardware accelerator processor configured to generate a first soft symbol group based on the first demodulated signal for storage in the memory and a second soft symbol group based on the second demodulated signal for storage in the memory; and

a host processor configured to generate and output a first system frame number (SFN) for the first servicing cell based on the first soft symbol group and a second SFN for the second servicing cell based on the second soft symbol group; and

a controller configured to;

turn off the AFE after the first and second demodulated signals get stored in the memory and the processor after the processor outputs the first and second SFNs; and

turn off the hardware accelerator processor after the first soft symbol group and second soft symbol group get stored in the memory and the processor after the host processor outputs the first and second SFNs.

2. The wireless communication device of claim 1, wherein the analog front end (AFE) is further configured to:

receive at least one of the first paging broadcast or the second paging broadcast via a Paging Indicator Channel (PICH).

3. The wireless communication device of claim 1, wherein the processor is further configured to:

perform a first processing operation using parallel processing and a second processing operation using serial processing.

4. The wireless communication device of claim 1 further comprising:

the host processor configured to perform parallel processing of the first soft symbol group and second soft symbol group to generate a first broadcast channel transport block based on the first servicing cell and a second broadcast channel transport block based on the second servicing cell; and

the host processor configured to perform serial processing of the first broadcast channel transport block and the second broadcast channel transport block to generate the first and second SFNs.

5. The wireless communication device of claim 1 further comprising:

the processor configured to process the first and second demodulated signals based on at least one of descrambling, dispreading, pilot filtering, rake combining, metric generation, de-interleaving, Viterbi decoding, parallel processing, or serial processing.

6. The wireless communication device of claim 1 further comprising:

a wideband code division multiple access (W-CDMA) wireless communication device, wherein at least one of the first servicing cell or the second servicing cell is a W-CDMA cell.

7. The wireless communication device of claim 1 further comprising:

a battery-powered wireless communication device; and

the AFE configured, when operational, to consume at least one of higher current or more energy than the processor when operational.

8. The wireless communication device of claim 1 further comprising:

a laptop host computer, a personal digital assistant host, a personal computer host, or a cellular telephone host.

9. A wireless communication device comprising:

a memory;

an analog front end (AFE) configured to generate a first demodulated signal based on a first paging broadcast from a first servicing cell for storage in the memory and a second demodulated signal based on a second paging broadcast from a second servicing cell for storage in the memory, wherein at least one of the first servicing cell or the second servicing cell is a wideband code division multiple access (W-CDMA) cell;

a processor configured to process the first and second demodulated signals based on at least one of descrambling, dispreading, pilot filtering, rake combining, metric generation, de-interleaving, Viterbi decoding, parallel processing, or serial processing, wherein the processor includes;

a hardware accelerator processor configured to generate a first soft symbol group based on the first demodulated signal for storage in the memory and a second soft symbol group based on the second demodulated signal for storage in the memory; and

a host processor configured to generate and output a first system frame number (SFN) for the first servicing cell based on the first soft symbol group and a second SFN for the second servicing cell based on the second soft symbol group;

a controller configured to;

turn off the AFE after the first and second demodulated signals get stored in the memory and the processor after the processor outputs the first and second SFNs; and

turn off the hardware accelerator processor after the first soft symbol group and second soft symbol group get stored in the memory and the processor after the host processor outputs the first and second SFNs.

10. The wireless communication device of claim 9, wherein the analog front end (AFE) is further configured to:

receive at least one of the first paging broadcast or the second paging broadcast via a Paging Indicator Channel (PICH).

11. The wireless communication device of claim 9, wherein the processor is further configured to:

perform a first processing operation using parallel processing and a second processing operation using serial processing.

12. The wireless communication device of claim 9 further comprising:

a battery-powered wireless communication device; and

the AFE configured, when operational, to consume at least one of higher current or more energy than the processor when operational.

13. The wireless communication device of claim 9 further comprising:

a laptop host computer, a personal digital assistant host, a personal computer host, or a cellular telephone host.

14. A method for execution by a wireless communication device, the method comprising:

receiving a first paging broadcast from a first servicing cell;

receiving a second paging broadcast from a second servicing cell;

operating an analog front end (AFE) of the wireless communication device to generate a first demodulated signal based on the first paging broadcast for storage in a memory of the wireless communication device and second demodulated signal based on the second paging broadcast for storage in the memory of the wireless communication device;

turning off the AFE after the first and second demodulated signals get stored in the memory;

operating a hardware accelerator processor of a processor of the wireless communication device to generate a first soft symbol group based on the first demodulated signal for storage in the memory and a second soft symbol group based on the second demodulated signal for storage in the memory;

operating a host processor of the processor to generate and output a first system frame number (SFN) for the first servicing cell based on the first soft symbol group and the second SFN for the second servicing cell based on the second soft symbol group;

turning off the processor after the processor outputs the first and second SFNs; and

turning off the hardware accelerator processor after the first and second soft symbol groups get stored in the memory and the processor after the host processor outputs the first and second SFNs.

15. The method of claim 14 further comprising:

receiving at least one of the first paging broadcast or the second paging broadcast via a Paging Indicator Channel (PICH).

16. The method of claim 15 further comprising:

operating the host processor to perform parallel processing of the first soft symbol group and second soft symbol group to generate a first broadcast channel transport block based on the first servicing cell and a second broadcast channel transport block based on the second servicing cell; and

operating the host processor to perform serial processing of the first broadcast channel transport block and the second broadcast channel transport block to generate the first and second SFNs.

17. The method of claim 14 further comprising:

performing a first processing operation using parallel processing and a second processing operation using serial processing.

18. The method of claim 14 further comprising:

operating the processor to process the first and second demodulated signals based on at least one of descrambling, dispreading, pilot filtering, rake combining, metric generation, de-interleaving, Viterbi decoding, parallel processing, or serial processing.

19. The method of claim 14, wherein the wireless communication device is a battery-powered wireless communication device, and the AFE is configured, when operational, to consume at least one of higher current or more energy than the processor, when operational.

20. The method of claim 14, wherein the wireless communication device is a laptop host computer, a personal digital assistant host, a personal computer host, or a cellular telephone host.