Methods for intelligently shedding pages

• US 8,483,726 B1
• Filed: 10/13/2009
• Issued: 07/09/2013
• Est. Priority Date: 10/13/2009
• Status: Expired due to Fees

• Current Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Khanka, Bhagwan, Vargantwar, Sachin R., Rai, Deveshkumar, Shetty, Manoj
• Primary Examiner(s): Kincaid, Lester
• Assistant Examiner(s): Khan, Mehmood B
• Application Number:
  US12/578,114
• Time in Patent Office: 1,365 Days
• Field of Search: 455/458
• US Class Current: 455/458
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel

Abstract

Disclosed are methods for determining which page attempt to shed. In accordance with these methods, when a page attempt from a first sequence directed to a first access terminal (AT) contends with a page attempt from a second sequence directed to a second AT for transmission over the air interface of a RAN, the RAN determines which sequence has been shed to a greater extent. The RAN then transmits the page attempt from the sequence that has been shed to a greater extent and sheds the page attempt from the sequence that has been shed to a lesser extent. The methods advantageously help to avoid one sequence of page attempts being disproportionately shed.

Claims

1. In a radio access network (RAN) in which, when the RAN seeks to transmit a page via an air interface to an access terminal (AT) served by the RAN, the RAN engages in a sequence of page attempts until an acknowledgement is received or an end of the sequence is reached, a method for determining a page attempt to shed, comprising:

detecting that a page attempt from a first sequence and a page attempt from a second sequence are both contending for transmission over the air interface;

comparing an extent to which the first sequence has been shed to an extent to which the second sequence has been shed;

shedding the page attempt from the sequence that has been shed to a lesser extent; and

transmitting the page attempt from the sequence that has been shed to a greater extent.

2. The method of claim 1, wherein the detecting, comparing, shedding, and transmitting are carried out by a base station.

3. The method of claim 1, wherein at least the detecting and comparing are carried out by a mobile switching center (MSC).

4. The method of claim 1, wherein page attempts are transmitted over a paging channel in the air interface, and wherein the paging channel is a forward-link channel, the method further comprising:

detecting that the paging channel has limited capacity.

5. The method of claim 4, wherein detecting that a page attempt from a first sequence and a page attempt from a second sequence are both contending for transmission over the air interface comprises a determination that the paging channel cannot immediately transmit both the page attempt from the first sequence and the page attempt from the second sequence.

6. The method of claim 1, wherein the extent to which the first sequence has been shed comprises a number of page attempts from the first sequence that have been shed and thus have not been transmitted, and wherein the extent to which the second sequence has been shed comprises a number of page attempts from the second sequence that have been shed and thus have not been transmitted.

7. The method of claim 1, wherein the first sequence and the second sequence are directed to different ATs.

8. In a radio access network (RAN) in which, when the RAN seeks to transmit a page via an air interface to an access terminal (AT) served by the RAN, the RAN engages in a sequence of page attempts until an acknowledgement is received or an end of the sequence is reached, a method for determining a page attempt to shed, comprising:

determining a first shed factor for a first sequence of page attempts directed to a first AT, such that the first shed factor is related to a number of page attempts in the first sequence that have been shed and thus have not been transmitted to the first AT;

determining a second shed factor for a second sequence of page attempts directed to a second AT, such that the second shed factor is related to a number of page attempts in the second sequence that have been shed and thus have not been transmitted to the second AT;

detecting that a page attempt from the first sequence and a page attempt from the second sequence are both contending for transmission over the air interface;

comparing the first shed factor to the second shed factor; and

based on the comparison, (i) shedding the page attempt from the sequence with the lower shed factor and (ii) transmitting the page attempt from the sequence with the higher shed factor.

9. The method of claim 8, wherein the determining a first shed factor, determining a second shed factor, detecting, comparing, shedding, and transmitting are carried out by a base station.

10. The method of claim 8, wherein at least the determining a first shed factor, determining a second shed factor, detecting, and comparing are carried out by a mobile switching center (MSC).

11. The method of claim 8, wherein page attempts are transmitted over a paging channel in the air interface, and wherein the paging channel is a forward-link channel, the method further comprising:

detecting that the paging channel has limited capacity.

12. The method of claim 11, wherein detecting that a page attempt from the first sequence and a page attempt from the second sequence are both contending for transmission over the air interface comprises a determination that the paging channel cannot immediately transmit both the page attempt from the first sequence and the page attempt from the second sequence.

13. The method of claim 8, wherein the first AT and the second AT are different ATs.

14. The method of claim 8, further comprising:

after shedding the page attempt from the sequence with the lower shed factor, incrementing the shed factor of that sequence.

15. A method for determining a page attempt to shed, comprising:

a radio access network (RAN) seeking to transmit a first page message via an air interface to a first access terminal (AT) by engaging in a first sequence of page attempts;

the RAN seeking to transmit a second page message via the air interface to a second AT by engaging in a second sequence of page attempts;

the RAN detecting that a page attempt from the first sequence and a page attempt from the second sequence are both contending for transmission over the air interface;

the RAN determining a first shed factor for the first sequence, such that the first shed factor is related to the extent to which the first sequence has been shed and thus has not been transmitted to the first AT;

the RAN determining a second shed factor for the second sequence, such that the second shed factor is related to the extent to which the second sequence has been shed and thus has not been transmitted to the second AT;

the RAN comparing the first shed factor to the second shed factor; and

based on the comparison, the RAN (i) shedding a page attempt from the sequence with the lower shed factor and (ii) transmitting a page attempt from the sequence with the higher shed factor.

16. The method of claim 15, wherein the detecting, determining a first shed factor, determining a second shed factor, comparing, shedding, and transmitting are carried out by a base station of the RAN.

17. The method of claim 15, wherein at least the detecting, determining a first shed factor, determining a second shed factor, and comparing are carried out by a mobile switching center (MSC) of the RAN.

18. The method of claim 15, wherein page attempts are transmitted over a paging channel in the air interface, and wherein the paging channel is a forward-link channel, the method further comprising:

the RAN detecting that the paging channel has limited capacity.

19. The method of claim 18, wherein the RAN detecting that a page attempt from the first sequence and a page attempt from the second sequence are both contending for transmission over the air interface comprises the RAN determining that the paging channel cannot immediately transmit both the page attempt from the first sequence and the page attempt from the second sequence.

20. The method of claim 15, wherein the first AT and the second AT are different ATs.