Method for performing RR-level registration in a wireless communication system

• US 20070032234A1
• Filed: 10/05/2006
• Published: 02/08/2007
• Est. Priority Date: 01/10/2000
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Jain, Avinash, Tiedemann, Edward
• Granted Patent: US 7,773,987 B2
• Time in Patent Office: Days
• US Class Current: 455/435.100
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support

Abstract

Techniques to reduce the amount of registration required by a mobile station in a wireless communication system, especially if the registration zones are defined to be small areas. In one scheme, a mobile station registers (e.g., at RR-level) with a network entity (e.g., a base station) each time it enters a new registration zone, which can correspond to an R-TMSI zone defined by GSM MC-MAP. The mobile station maintains a timer for each zone with which it has already registered but has since left. If the mobile station leaves a particular zone for a period longer than a time-out period, the registration with that zone times out, and the mobile station re-registers with that zone whenever it re-enters the zone. The mobile station may implement zone-based, timer-based, implicit, traffic channel RR, and some other registrations, or a combination thereof. Parameters to facilitate registration may be defined by a base station.

Claims

1. A method for registering with a plurality of registration zones in a wireless communication network, the method comprising:

receiving an assignment for a first Temporary Mobile Station Identity (TMSI) from a first network entity in response to registration with a first registration zone;

registering with a second network entity in a second registration zone; and

receiving an assignment for a second TMSI from the second network entity in response to registration with the second registration zone.

2. The method of claim 1, wherein each registration zone corresponds to a Radio TMSI (R-TMSI) zone defined by GSM MC-MAP standard.

3. The method of claim 1, wherein each network entity corresponds to a base station in the communication network.

4. The method of claim 1, further comprising:

maintaining a first counter to provide an indication to initiate timer-based registration; and

initiating timer-based registration if a value in the first counter exceeds a timer-based registration count value.

5. The method of claim 4, further comprising:

receiving a value representative of a maximum expiration period for timer-based registration; and

setting the timer-based registration count value based on the received value.

6. The method of claim 5, wherein the timer-based registration count value is a pseudo random value in a range between zero and a maximum value related to the received value.

7. The method of claim 1, wherein the registration with the second network entity is in response to entering the second registration zone.

8. The method of claim 1, wherein the registration with the second network entity is implicitly performed in response to establishing a connection with the second network entity.

9. The method of claim 1, wherein the first registration zone is entered first and the second registration zone is subsequently entered, the method further comprising:

activating a first timer for the first registration zone upon registration with the second network entity.

10. The method of claim 9, further comprising:

updating a count value for the first timer at each update interval; and

timing out registration with the first registration zone if a count value for the first timer exceeds a time-out value.

11. The method of claim 10, wherein the time-out value for the first timer for the first registration zone is provided by the second network entity.

12. The method of claim 1, further comprising:

deactivating a second timer for the second registration zone upon registration with the second network entity.

13. The method of claim 1, further comprising:

maintaining a zone list having a plurality of entries, one entry for each registration zone in which TMSI has been assigned and with which registration is currently valid.

14. The method of claim 13, further comprising:

receiving a value indicative of a maximum number of registration zones with which registration is allowed; and

deleting one or more entries from the zone list such that the number of entries maintained in the zone list is equal to or less than the maximum number of allowable registration zones.

15. The method of claim 14, wherein oldest entries in the zone list are deleted first.

16. The method of claim 15, wherein the oldest entries in the zone list are determined by associated timers activated for the entries.

17. The method of claim 13, wherein each entry in the zone list corresponds to an active registration zone, and wherein each entry includes

a zone number of the active registration zone,

a zone code assigned for the active registration zone, and

an entry timer for providing an indication used to time out registration with the active registration zone.

18. The method of claim 17, wherein each entry in the zone list further includes

a time-out count indicative of a maximum time-out period for registration with the active registration zone, and

wherein a time-out period for registration with the active registration zone is determined based in part on the time-out count.

19. The method of claim 1, wherein registration is enabled while in a connected state indicative of an established RRC connection between a mobile station and a base station.

20. The method of claim 1, wherein RR-level registration is enabled via a message from a network entity.

21. The method of claim 4, wherein timer-based registration is enabled via a message from a network entity.

22. The method of claim 1, wherein the wireless communication network conforms to cdma2000 standard.

23. The method of claim 22, wherein the wireless communication network further supports GSM MC-MAP standard.

24. A method for registering with a plurality of Radio Temporary Mobile Station Identity (R-TMSI) zones in a wireless communication network, the method comprising:

registering with a first base station in a first R-TMSI zone;

receiving an assignment for a first R-TMSI code from the first base station in response to registration with the first R-TMSI zone;

registering with a second base station in a second R-TMSI zone; and

receiving an assignment for a second R-TMSI code from the second base station in response to registration with the second R-TMSI zone.

25. The method of claim 24, wherein the first registration zone is entered first and the second registration zone is subsequently entered, the method further comprising:

activating a first timer for the first R-TMSI zone upon registration with the second base station; and

deactivating a second timer for the second R-TMSI zone upon registration with the second base station.

26. The method of claim 25, further comprising:

updating a count value for the first timer at each update interval; and

timing out registration with the first R-TMSI zone if the count value for the first timer exceeds a time-out value.

27. A method for managing multiple Temporary Mobile Station Identities (TMSIs) in a radio communication network, the method comprising:

assigning a first TMSI to a mobile station via a first base station when the mobile station enters a first Radio TMSI (R-TMSI) zone;

registering the mobile station with a second base station in a second R-TMSI zone; and

assigning a second TMSI to the mobile station via the second base station so that the mobile station is registered in a plurality of R-TMSI zones.

28. An apparatus for registering with a plurality of registration zones in a wireless communication network, comprising:

means for receiving an assignment for a first Temporary Mobile Station Identity (TMSI) from a first network entity in response to registration with a first registration zone;

means for registering with a second network entity in a second registration zone; and

means for receiving an assignment for a second TMSI from the second network entity in response to registration with the second registration zone.

29. The apparatus of claim 28, wherein each network entity corresponds to a base station in the communication network.

30. The apparatus of claim 28, further comprising:

means for maintaining a first counter to provide an indication to initiate timer-based registration; and

means for initiating timer-based registration if a value in the first counter exceeds a timer-based registration count value.

31. The apparatus of claim 30, further comprising:

means for receiving a value representative of a maximum expiration period for timer-based registration; and

means for setting the timer-based registration count value based on the received value.

32. The apparatus of claim 31, wherein the timer-based registration count value is a pseudo random value in a range between zero and a maximum value related to the received value.

33. A method, comprising:

determining whether a mobile station has entered a new registration zone;

assigning a temporary identity to the mobile station for the new registration zone;

activating an entry timer for each registration zone that the mobile station has exited;

determining if the entry timer associated with the mobile station has expired; and

deactivating a registration of the mobile station for the registration zone for which the associated entry timer has expired.