Dual event slotted paging

• US 8,046,005 B2
• Filed: 02/23/2007
• Issued: 10/25/2011
• Est. Priority Date: 05/30/1997
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Gilhousen, Klein S., Butler, Brian K.
• Primary Examiner(s): Edouard; Patrick
• Assistant Examiner(s): Chambers; Tangela T.
• Application Number:
  US11/678,547
• Publication Number:
  US 20070142066A1
• Time in Patent Office: 1,705 Days
• Field of Search: 455/458, 455/434, 455/452.1, 455/455
• US Class Current: 455/458
• CPC Class Codes: H04L 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04W 48/12 using downlink control channel
• 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 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 68/025 Indirect paging
• CPC Class Codes: H04W 68/08 using multi-step notification by increasing the notification area
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A novel and improved method and system for paging a cellular telephone or other wireless terminal using two paging channels that reduces standby mode power consumption described. In one embodiment of the invention, a minimally encoded quick paging channel is established over which short, quick page messages are transmitted during one of a set of quick paging slots. The quick page message indicates that a communications request has been received, and that the receiving communication terminals should process a highly encoded full paging channel over which more detailed, full page messages are transmitted during the next full paging slot. A terminal monitors full paging channel only after a quick page message has been received on the quick paging channel.

Claims

1. A method for paging a wireless terminal in a wireless communication system comprising:

transmitting a quick page message from a base station to the wireless terminal via a first channel, said quick page message notifying the wireless terminal to begin monitoring a second channel for a full page message;

transmitting said full page message from the base station to the wireless terminal via said second channel;

wherein said second channel includes more processing than said first channel, wherein said more processing includes encoding through an encoder, interleaving through an interleaver, and adding cyclic redundancy check through a cyclic redundancy check circuit to said full page message;

wherein said wireless terminal is a particular wireless terminal included within a set of wireless terminals in said wireless communication system;

wherein said quick page message is for directing said set of wireless terminals to monitor said second channel for said full page message;

wherein said quick page message contains less data than said full page message;

wherein said full page message identifies said particular wireless terminal among said set of wireless terminals;

wherein said transmitting said quick page message occurs during a first time slot assigned to the set of wireless terminals;

wherein said transmitting said full page message occurs during a second time slot assigned to the set of wireless terminals;

wherein said second time slot occurs after said first time slot by a delay;

wherein said quick page message is comprised of a single bit of data,

and wherein said single bit of data transmitted via the first channel is modulated multiple times by the same code, effectively transmitting the bit multiple times in said transmitting said quick page message.

2. The method as set forth in claim 1 further comprising:

calculating said delay between said first and second time slots.

3. The method as set forth in claim 1, wherein said second channel is established via direct sequence modulation.

4. The method as set forth in claim 1 further comprising the steps of

generating said quick page message before said step of transmitting said quick page message via said first channel;

and

generating said full page message before transmitting said full page message via said second channel.

5. The method as set forth in claim 1 further comprising the steps of:

direct sequence spreading said full page message; and

direct sequence spreading said quick page message.

6. The method as set forth in claim 1 further comprising the steps of:

receiving said quick page message during said first time slot;

activating signal processing circuitry of the wireless terminal;

receiving said full page message during said second time slot and using said activated signal processing circuitry to process said full page message.

7. The method as set forth in claim 6 wherein said signal processing circuitry is comprised of a trellis decoding system.

8. The method as set forth in claim 6 wherein said signal processing circuitry is comprised of a deinterleaver.

9. The method as set forth in claim 6 wherein said signal processing circuitry is comprised of a cyclical redundancy check circuit.

10. The method as set forth in claim 1, wherein the encoder is a convolutional encoder.

11. A method for paging a wireless terminal in a wireless communication system comprising:

receiving, by the wireless terminal, a quick page message from a base station via a first channel, said quick page message notifying the wireless terminal to begin monitoring a second channel for a full page message;

receiving, by the wireless terminal, said full page message from said base station via said second channel;

wherein said receiving said full page message includes more processing than said receiving said quick page message, wherein said more processing includes decoding through a decoding system, deinterleaving through a deinterleaver, and processing through a cyclical redundancy check circuit;

wherein said wireless terminal is a particular wireless terminal included within a set of wireless terminals in said wireless communication system;

wherein said quick page message is for directing said set of wireless terminals to monitor said second channel for said full page message;

wherein said quick page message contains less data bits than said full page message;

wherein said full page message identifies said particular wireless terminal among said set of wireless terminals;

wherein said receiving said quick page message occurs during a first time slot assigned to the set of wireless terminals;

wherein said receiving said full page message occurs during a second time slot assigned to the set of wireless terminals;

wherein said second time slot occurs after said first time slot by a delay;

wherein said quick page message is comprised of a single bit of data, said single bit of data received via the first channel is modulated multiple times by the same code, effectively receiving the bit multiple times in said receiving said quick page message.

12. The method as set forth in claim 11 further comprising:

calculating said delay between said first and second time slots.

13. The method as set forth in claim 11, wherein the decoding system is a trellis decoding system.

14. The method as set forth in claim 11 further comprising:

activating signal processing circuitry of the wireless terminal; and

using said activated signal processing circuitry to process said full page message.

15. The method as set forth in claim 14 wherein said signal processing circuitry is comprised of a trellis decoding system.

16. The method as set forth in claim 14 wherein said signal processing circuitry is comprised of a deinterleaver.

17. The method as set forth in claim 14 wherein said signal processing circuitry is comprised of a cyclical redundancy check circuit.

18. A wireless terminal, comprising:

means for receiving a quick page message from a base station via a first channel, said quick page message notifying the wireless terminal to begin monitoring a second channel for a full page message;

means for receiving said full page message from said base station via said second channel;

wherein said means for receiving said full page message includes more processing means than said means for receiving said quick page message, wherein said more processing means includes means for decoding through a decoding system, means for deinterleaving through a deinterleaver, and means for processing through a cyclical redundancy check circuit;

wherein said wireless terminal is a particular wireless terminal included within a set of wireless terminals;

wherein said quick page message is for directing said set of wireless terminals to monitor said second channel for said full page message;

wherein said quick page message contains less data than said full page message;

wherein said full page message identifies said particular wireless terminal among said set of wireless terminals;

wherein said quick page message is received by the wireless terminal during a first time slot assigned to the set of wireless terminals;

wherein said full page message is received by the wireless terminal during a second time slot assigned to the set of wireless terminals;

wherein said second time slot occurs after said first time slot by a delay;

wherein said quick page message is comprised of a single bit of data, wherein said single bit of data received via the first channel is modulated multiple times by the same code, effectively receiving the bit multiple times in said receiving said quick page message.

19. The apparatus as set forth in claim 18 further comprising:

means for calculating said delay between said first and second time slots.

20. The apparatus as set forth in claim 18, wherein the decoding system is a trellis decoding system.

21. A wireless terminal, comprising:

at least one processor adapted to

receive a quick page message from a base station via a first channel, said quick page message notifying the wireless terminal to begin monitoring a second channel for a full page message, and

receive said full page message from said base station via said second channel; and

a memory coupled to the at least one processor;

wherein said receive said full page message includes more processing than said receive said quick page message, wherein said more processing includes decoding through a decoding system, deinterleaving through a deinterleaver, and processing through a cyclical redundancy check circuit;

wherein said wireless terminal is a particular wireless terminal included within a set of wireless terminals;

wherein said quick page message is for directing said set of wireless terminals to monitor said second channel for said full page message;

wherein said quick page message contains less data than said full page message;

wherein said full page message identifies said particular wireless terminal among said set of wireless terminals;

wherein said quick page message is received by the wireless terminal during a first time slot assigned to the set of wireless terminals;

wherein said full page message is received by the wireless terminal during a second time slot assigned to the set of wireless terminals;

wherein said second time slot occurs after said first time slot by a delay;

wherein said quick page message is comprised of a single bit of data, wherein said single bit of data received via the first channel is modulated multiple times by the same code, effectively receiving the bit multiple times in said receiving said quick page message.

22. The apparatus as set forth in claim 21, wherein said processor is further adapted to calculate said delay between said first and second time slots.

23. The apparatus as set forth in claim 21, wherein the decoding system is a trellis decoding system.

24. The apparatus as set forth in claim 21, said processor is further adapted to:

activate signal processing circuitry of the wireless terminal; and

use said activated signal processing circuitry to process said full page message.

25. The apparatus as set forth in claim 24, wherein said signal processing circuitry is comprised of a trellis decoding system.

26. The apparatus as set forth in claim 24, wherein said signal processing circuitry is comprised of a deinterleaver.

27. The apparatus as set forth in claim 24, wherein said signal processing circuitry is comprised of a cyclical redundancy check circuit.