METHOD OF IMPROVING RADIO RESOURCE CONTROL CONNENCTION ESTABLISHMENT IN A WIRELESS COMMUNICATION SYSTEM AND RELATED COMMUNICATION DEVICE

• US 20100099402A1
• Filed: 10/20/2008
• Published: 04/22/2010
• Est. Priority Date: 10/20/2008
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: Wu, Chih-Hsiang
• Granted Patent: US 8,838,089 B2
• Time in Patent Office: Days
• US Class Current: 455/423
• CPC Class Codes: H04W 76/18 Management of setup rejection or failure

Abstract

A method of improving Radio Resource Control, abbreviated to RRC, connection establishment for an RRC layer of a user equipment in a wireless communication system, the method including when a specific event occurs during an RRC connection establishment procedure, initiating the RRC connection establishment procedure based on completion of the specific event.

Claims

1. A method of improving Radio Resource Control, abbreviated to RRC, connection establishment for an RRC layer of a user equipment, abbreviated to UE, in a wireless communication system, the method comprising:

when a specific event occurs during an RRC connection establishment procedure, initiating the RRC connection establishment procedure based on completion of the specific event.

2. The method of claim 1, wherein the specific event comprises a cell reselection or a cell barred.

3. The method of claim 1, wherein a specific timer is initiated by a connection request failure message or a service request message.

4. The method of claim 1, wherein the RRC connection establishment procedure is initiated by a tracking area update request message, an attach request message, or a service request message.

5. The method of claim 1, further comprising not generating or blocking a failure message to a Non Access Stratum layer of the UE when the specific event occurs.

6. The method of claim 1, further comprising generating a success message to a Non Access Stratum layer of the UE when the specific event is completed, for initiating a connection request procedure.

7. The method of claim 1, wherein the RRC connection establishment procedure can be aborted after the specific event is completed.

8. A method of improving Radio Resource Control connection establishment for a Non Access Stratum, abbreviated to NAS, layer of a user equipment, abbreviated to UE, in a wireless communication system, the method comprising:

permitting initiating a second service request procedure when a first service request procedure is pending.

9. The method of claim 8, wherein the first service request procedure is pending due to a cell reselection or a cell barred.

10. The method of claim 8, wherein the second service request procedure is not influenced by the cell barred.

11. The method of claim 8, wherein the first service request procedure and the second service request procedure have associated timers running independently.

12. The method of claim 8, wherein an RRC connection establishment cause determined by the second service request procedure has a higher priority than an RRC connection establishment cause determined by the first service request procedure.

13. The method of claim 12, wherein the priorities of the RRC connection establishment causes are determined according to:

emergency call>

high priority access>

mobile terminating access>

mobile originating signalling=mobile originating data.

14. A method of improving Radio Resource Control connection establishment in a Non Access Stratum, abbreviated to NAS, layer of a user equipment, abbreviated to UE, in a wireless communication system, the method comprising:

when a service request procedure is triggered but cannot be initiated due to an ongoing periodic Tracking Area Update, abbreviated to TAU, procedure, initiating the service request procedure after the periodic TAU procedure is completed or aborted.

15. The method of claim 14 further comprising when the UE enters a connected mode due to the service request procedure, stopping a timer associated with the periodic TAU procedure when the timer is running.

16. The method of claim 15 further comprising initiating the periodic TAU procedure after the UE leaves the connected mode.

17. The method of claim 15, wherein the connected mode comprises Evolved Packet System Mobility Management connected mode.

18. The method of claim 15, wherein the timer started when a TAU request failure occurs.

19. The method of claim 15, wherein the timer is started when a number of times of TAU request failure is equal to a threshold.

20. A method of improving Radio Resource Control, abbreviated to RRC, connection establishment for an RRC layer of a user equipment, abbreviated to UE, in a wireless communication system, the method comprising:

when the UE has a plurality of Non Access Stratum, abbreviated to NAS, messages pending for transmission in an idle mode, initiating an RRC connection establishment procedure according to one of the plurality of NAS messages with a higher priority RRC connection establishment cause.

21. The method of claim 20, wherein the idle mode is Evolved Packet System Mobility Management idle mode.

22. The method of claim 20, wherein the priorities of the RRC connection establishment causes are determined according to:

emergency call>

high priority access>

mobile terminating access>

mobile originating signalling=mobile originating data.