DUAL EVENT SLOTTED PAGING

• US 20070142066A1
• Filed: 02/23/2007
• Published: 06/21/2007
• Est. Priority Date: 05/30/1997
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Butler, Brian, Gilhousen, Klein
• Granted Patent: US 8,046,005 B2
• Time in Patent Office: Days
• 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 telecommunications system comprising:

transmitting a quick page message via a less encoded channel, said quick page message notifying the wireless terminal to begin monitoring a highly encoded channel for a full page message;

transmitting a full page message via said highly encoded channel;

wherein said highly encoded channel includes more processing than said less encoded channel, wherein said more processing includes encoding through a convolutional 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 highly encoded 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 transmitting said quick page message is during a first time slot assigned to the set of wireless terminals;

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

wherein said second time slot is assigned to said first time slot by way of having a determined time delay between said first and second time slots;

wherein said second time slot occurs after said first time slot;

wherein said quick page message is comprised of a single bit of data, wherein said single bit of data transmitted via the less encoded channel is modulated multiple times by the same Walsh 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 determined time delay between said first and second time slots.

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

4. The method as set forth in claim 1 for paging a wireless terminal further comprising the steps of

generating a quick page message before said step of transmitting said quick page message via a less encoded channel;

and

generating a full page message before transmitting said full page message via said highly encoded 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;

receiving said full page message during said second time slot and using said activated signal processing circuitry to process said full 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. A method for paging a wireless terminal in a wireless telecommunications system comprising:

receiving a quick page message via a less encoded channel, said quick page message notifying the wireless terminal to begin monitoring a highly encoded channel for a full page message;

receiving a full page message via said highly encoded 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 trellis 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 highly encoded 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 is during a first time slot assigned to the set of wireless terminals;

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

wherein said second time slot is assigned to said first time slot by way of having a determined time delay between said first and second time slots;

wherein said second time slot occurs after said first time slot;

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

11. The method as set forth in claim 10 further comprising:

calculating said determined time delay between said first and second time slots.

12. An apparatus for paging a wireless terminal in a wireless telecommunications system, comprising:

means for receiving a quick page message via a less encoded channel, said quick page message notifying the wireless terminal to begin monitoring a highly encoded channel for a full page message;

means for receiving a full page message via said highly encoded 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 trellis 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 in said wireless communication system;

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

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

wherein said quick page message lacks any information for identifying any wireless terminal among said set of wireless terminals;

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

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

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

wherein said second time slot is assigned to said first time slot by way of having a determined time delay between said first and second time slots;

wherein said second time slot occurs after said first time slot;

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

13. The apparatus as set forth in claim 12 further comprising:

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