Methods and devices for efficient use of multiple paging channels

• US 8,768,384 B1
• Filed: 02/10/2010
• Issued: 07/01/2014
• Est. Priority Date: 02/10/2010
• Status: Expired due to Fees

• Current Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Vargantwar, Sachin R., Khanka, Bhagwan
• Primary Examiner(s): SIVJI, NIZAR N
• Application Number:
  US12/703,467
• Time in Patent Office: 1,602 Days
• Field of Search: 370/311, 370/329, 370/328, 455/434, 455/450, 455/455, 455/458, 455/574, 455/522, 455/343.2, 713/320
• US Class Current: 455/458
• 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: H04W 68/005 Transmission of information for alerting of incoming communication
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Methods and systems for efficiently using multiple paging channels in a wireless communication network are proposed. In particular, a radio access network (RAN) may determine that a wireless communication device (WCD), such as a cell phone, has not been responding to paging messages transmitted on a secondary paging channel. In response to this determination, the RAN may instruct the WCD to listen only to a primary paging channel, while the RAN will only use the primary paging channel to page the WCD. This, in turn, may increase the likelihood that the WCD is able to properly receive and respond to paging messages, and reduce the power consumption and battery drain of neighboring WCDs.

Claims

1. A method comprising:

a radio access network (RAN) transmitting a set of paging messages to a wireless communication device (WCD) via a primary paging channel and a secondary paging channel, both of a wireless coverage area, wherein the RAN maintains a page success rate for the WCD;

based on the page success rate, determining that the WCD has not responded to at least one of the set of paging messages;

in response to determining that the WCD has not responded to the at least one of the set of paging messages, the RAN (i) transmitting a first command to the WCD to instruct the WCD to refrain from using the secondary paging channel while the WCD is associated with the wireless coverage area, and (ii) while the WCD is associated with the wireless coverage area, transmitting one or more paging messages to the WCD via only the primary paging channel;

detecting a handoff of the WCD to a new wireless coverage area of the RAN; and

in response to detecting the handoff, (i) transmitting a second command to the WCD to instruct the WCD to use both the primary paging channel and the secondary paging channel, and (ii) thereafter, transmitting two or more paging messages to the WCD via the primary paging channel and the secondary paging channel.

2. The method of claim 1, wherein the secondary paging channel comprises one of a quick paging channel (QPCH) and a paging indicator channel (PICH).

3. The method of claim 1, wherein determining that the WCD has not responded to the at least one of the set of paging messages comprises determining that the WCD has not responded to a threshold number of consecutive paging messages from the set.

4. The method of claim 1, wherein determining that the WCD has not responded to the at least one of the set of paging messages comprises determining that the WCD has not responded to a threshold number of paging messages out of all paging messages from the set.

5. The method of claim 1, wherein transmitting the first command to the WCD comprises transmitting the first command to the WCD using a short message service (SMS) message.

6. The method of claim 1, wherein transmitting the first command to the WCD comprises transmitting the first command to the WCD using a signaling message.

7. The method of claim 1, wherein the set of paging messages comprises an initial paging message and a subsequent paging message, and wherein the RAN transmitting the set of paging messages to the WCD comprises:

the RAN transmitting the initial paging message to the WCD on the secondary paging channel; and

after transmitting the initial paging message, the RAN transmitting the subsequent paging message to the WCD on the primary paging channel.

8. The method of claim 1, further comprising:

before transmitting the set of paging messages to the WCD, the RAN categorizing the WCD as configured to receive paging messages on both the primary paging channel and the secondary paging channel.

9. The method of claim 8, further comprising:

in response to determining that the WCD has not responded to the at least one of the set of paging messages, the RAN categorizing the WCD as configured to receive paging messages only on the primary paging channel.

10. The method of claim 9, wherein the RAN maintains a table of WCDs, each entry in the table (i) identifying a given WCD, and (ii) indicating whether the given WCD is configured to receive paging messages on the secondary paging channel, and wherein the RAN categorizing the WCD as configured to receive paging messages only on the primary paging channel comprises the RAN updating an entry associated with the WCD to indicate that the WCD is not configured to receive paging messages on the secondary paging channel.

11. A radio access network (RAN) that radiates to define a wireless coverage area, wherein the RAN supports a primary paging channel and a secondary paging channel via the wireless coverage area, the RAN comprising:

a processor;

a data storage; and

program instructions, stored in the data storage and executable by the processor, to (i) transmit a set of paging messages to a wireless communication device (WCD) via both the primary paging channel and the secondary paging channel, wherein the RAN maintains a page success rate for the WCD, (ii) based on the page success rate, determine that the WCD has not responded to at least one of the set of paging messages, and (iii) in response to determining that the WCD has not responded to the at least one of the set of paging messages, transmitting a first command to the WCD to instruct the WCD to refrain from using the secondary paging channel while the WCD is associated with the wireless coverage area, while the WCD is associated with the wireless coverage area, transmitting one or more paging messages to the WCD via only the primary paging channel, (iv) detecting a handoff of the WCD to a new wireless coverage area of the RAN, and (v) in response to detecting the handoff, transmitting a second command to the WCD to instruct the WCD to use both the primary paging channel and the secondary paging channel, and thereafter, transmitting two or more paging messages to the WCD via the primary paging channel and the secondary paging channel.

12. The RAN of claim 11, wherein determining that the WCD has not responded to the at least one of the set of paging messages comprises determining that the WCD has not responded to a threshold number of consecutive paging messages from the set.

13. The RAN of claim 11, wherein determining that the WCD has not responded to the at least one of the set of paging messages comprises determining that the WCD has not responded to a threshold number of paging messages out of all paging messages from the set.

14. The RAN of claim 11, wherein transmitting the first command to the WCD comprises transmitting the first command to the WCD using one of a short message service (SMS) message and a signaling message.

15. The RAN of claim 11, further comprising:

program instructions, stored in the data storage and executable by the processor, to, before transmitting the set of paging messages to the WCD, categorize the WCD as configured to receive paging messages on both the primary paging channel and the secondary paging channel; and

program instructions, stored in the data storage and executable by the processor, to, in response to determining that the WCD has not responded to the at least one of the set of paging messages, categorize the WCD as configured to receive paging messages only on the primary paging channel.

16. The RAN of claim 15, wherein the data storage contains a table of WCDs, each entry in the table (i) identifying a given WCD, and (ii) indicating whether the given WCD is configured to receive paging messages on the secondary paging channel, and wherein categorizing the WCD as configured to receive paging messages only on the primary paging channel comprises updating an entry associated with the WCD to indicate that the WCD is not configured to receive paging messages on the secondary paging channel.