Method and apparatus for user equipment directed radio resource control in a UMTS network

• US 7,949,377 B2
• Filed: 12/14/2005
• Issued: 05/24/2011
• Est. Priority Date: 12/14/2005
• Status: Active Grant

• Current Assignee: Blackberry Limited
• Original Assignee: Research In Motion Limited (Blackberry Limited)
• Inventors: Wirtanen, Jeffery, Islam, Muhammad Khaledul
• Primary Examiner(s): Nguyen; Tu X
• Application Number:
  US11/302,263
• Publication Number:
  US 20070135080A1
• Time in Patent Office: 1,987 Days
• Field of Search: 455/574, 455/410, 455/411, 455/458, 455/41.2, 455/524, 455/127.5
• US Class Current: 455/574
• CPC Class Codes: H04W 52/0251 using monitoring of local events, e.g. events related to user activity
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and apparatus for improved battery performance of user equipment in a wireless network having multiple radio resource control (RRC) states, the method comprising the steps of: monitoring, at the user equipment, application data exchange; determining when no application on the user equipment is expected to exchange data; and initiating, from the user equipment, a transition to a less battery demanding radio resource control state or mode.

Claims

1. A method for improving battery performance of a mobile user equipment used in a wireless network having multiple radio resource control (RRC) states, the user equipment capable of running a plurality of different applications, each of which is capable of exchanging data with the wireless network, the method comprising, at the user equipment:

receiving an indication of data exchange completion from each application, at the mobile user equipment, that exchanged data with the wireless network while in an RRC state or mode;

based on the data exchange completion indications received from each application that exchanged data in the RRC state or mode, determining when no application on the user equipment is expected to exchange data; and

initiating a transition from the RRC state or mode to another, less battery demanding RRC state or mode if a determination is made that no application on the user equipment is expected to exchange data.

2. The method of claim 1, wherein said initiating comprises tearing down a signaling connection setup between the user equipment and the wireless network.

3. The method of claim 2, wherein said tearing down causes the network to release a signaling connection between the user equipment and the wireless network.

4. The method of claim 1, wherein the wireless network is a UMTS network.

5. The method of claim 4, wherein the RRC state is a CELL_DCH state or a CELL_FACH state.

6. The method of claim 4, wherein the RRC state is a CELL_PCH state qr a URA_PCH state.

7. The method of claim 4, wherein said initiating includes sending a message to the wireless network requesting transition to the other, less battery demanding RRC state or mode.

8. The method of claim 1, wherein the other less battery demanding state or mode is a state selected from the group consisting of one of a CELL_FACH state, a CELL_PCH state, a URA_PCH state, or an idle mode.

9. The method of claim 1, wherein the user equipment includes an RRC connection manager, which performs said receiving, said determining and said initiating.

10. The method of claim 9, wherein said determining includes determining when no application on the user equipment is expected to exchange data based on a composite status of the data exchange completion indications received from any application that exchanged data in the RRC state or mode.

11. The method of claim 1 further comprising tracking each application of the plurality of different applications that exchanged data with the wireless network while in an RRC state or mode.

12. A user equipment adapted for reducing battery consumption in a wireless network, the user equipment having a radio subsystem including a radio adapted to communicate with the wireless network;

a radio processor having a digital signal processor and adapted to interact with said radio subsystem;

memory;

a user interface;

a processor adapted to run a plurality of applications each of which is capable of exchanging data with the wireless network, the user equipment comprising;

an RRC connection manager that is adapted and configured to;

receive an indication of data exchange completion from each application, at the mobile user equipment, that exchanged data with the wireless network while in an RRC state or mode, and, based on the data exchange completion indications received from each application that exchanged data in the RRC state or mode, determine when no application on the user equipment is expected to exchange data; and

initiate a transition from the RRC state or mode to another, less battery demanding state or mode if a determination is made that no application on the user equipment is expected to exchange data.

13. The user equipment of claim 12, wherein the RRC connection manager is adapted to tear down a signaling connection setup between the user equipment and the wireless network.

14. The user equipment of claim 13, wherein said RRC connection manager is adapted to determine when no application on the user equipment is expected to exchange data based on a composite status of the data exchange completion indications received from the applications that exchanged data in the RRC state or mode.

15. The user equipment of claim 13, wherein said RRC connection manager is adapted to determine when no application on the user equipment is expected to exchange data based on a delay to ensure that the applications that exchanged data in the RRC state or mode no longer require an RRC connection.

16. The user equipment of claim 13, wherein the RRC connection manager is adapted to cause the network to release a signaling connection between the user equipment and the wireless network by the tearing down of a signaling connection setup.

17. The user equipment of claim 12, wherein the RRC state or mode is a CELL_PCH state or a URA_PCH state.

18. The user equipment of claim 12, wherein the RRC connection manager is configured and arranged to send a message to the wireless network that requests a transition to the other, less battery-demanding RRC state or mode.

19. The user equipment of claim 18, wherein said other, less battery-demanding state or mode is one of a CELL_FACH state, a CELL_PCH state, a URA_PCH state, or an idle mode.

20. The user equipment of claim 19, wherein each of the plurality of different applications that exchanged data with the wireless network while in a RRC state or mode is an active application.

21. A method for improving battery performance of a mobile user equipment used in a wireless network having multiple radio resource control (RRC) states, the user equipment capable of running a plurality of different applications, each of which is capable of exchanging data with the wireless network, the method characterized by the steps of, at the user equipment:

receiving an indication of data exchange completion from each of the plurality of different applications that exchanged data with the wireless network while in an RRC state;

based on the data exchange completion indications received from the applications that exchanged data in the RRC state, determining when no application on the user equipment is expected to exchange data; and

initiating a transition from the RRC state to another, less battery demanding RRC state or mode if a determination is made that no application on the user equipment is expected to exchange data;

said user equipment including an RRC connection manager, which performs said receiving, determining and initiating steps,

wherein said determining step includes determining when no application on the user equipment is expected to exchange data based on a composite status of the data exchange completion indications received from the applications that exchanged data in the RRC state and, tracking associated Packet Data Protocol “

PDP”

contexts, packet switched “

PS”

radio access bearers, and PS radio bearers for said user equipment.

22. The method of claim 21, further comprising the step of blocking said initiating step if said RRC state is a URA_PCH state.

23. A method for improving battery performance of a mobile user equipment used in a wireless network having multiple radio resource control (RRC) states, the user equipment capable of running a plurality of different applications, each of which is capable of exchanging data with the wireless network, the method characterized by the steps of, at the user equipment:

receiving an indication of data exchange completion from each of the plurality of different applications that exchanged data with the wireless network while in an RRC state;

based on the data exchange completion indications received from the applications that exchanged data in the RRC state, determining when no application on the user equipment is expected to exchange data; and

initiating a transition from the RRC state to another, less battery demanding RRC state or mode if a determination is made that no application on the user equipment is expected to exchange data and upon a delay to ensure that the applications that exchanged data in the RRC state no longer require an RRC connection.

24. The method of claim 23, wherein the delay is a composite of a plurality of inactivity timeout periods, each inactivity timeout period corresponding to a respective application that exchanged data with the wireless network while in the RRC state or mode.

25. The method of claim 24, wherein said delay is dynamic based on traffic pattern history and/or application profiles.