Interrupting use of frequency layer convergence scheme

• US 7,894,397 B2
• Filed: 09/09/2009
• Issued: 02/22/2011
• Est. Priority Date: 08/05/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Myeong-Cheol
• Primary Examiner(s): Trinh; Tan
• Application Number:
  US12/556,280
• Publication Number:
  US 20090323624A1
• Time in Patent Office: 531 Days
• Field of Search: 370/432, 370/329, 370/343, 370/331, 370/335, 370/312, 370/231, 370/458, 370/388, 455/3.04, 455/67.13, 455/552.1, 455/412.2, 455/450, 455/461, 455/445, 455/517, 455/509, 455/516, 455/550.1, 455/525, 455/524, 455/449, 455/418, 455/452.1, 455/464, 455/566
• US Class Current: 370/329
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

The present invention is directed to interrupting use of a frequency layer convergence scheme that favors selection of a cell on a preferred frequency of a joined point-to-multipoint service. Specifically, a mobile terminal that has joined a point-to-multipoint service having a preferred frequency uses a frequency layer convergence scheme for selecting a cell. The frequency layer convergence scheme favors the selection of a cell on the preferred frequency layer. However, use of the frequency layer convergence scheme is interrupted upon an occurrence of a trigger.

Claims

1. A method of frequency selection for an MBMS (Multimedia Broadcast/Multicast Service) service, the method performed by a mobile terminal and comprising:

receiving a message that instructs an interruption of a MBMS frequency selection procedure, wherein the message initiates a reconfiguration procedure; and

stopping the MBMS frequency selection procedure if the mobile terminal is not in CELL_DCH state,

wherein the MBMS frequency selection procedure allows the mobile terminal to select a preferred frequency of the MBMS service.

2. The method of claim 1, wherein the received message includes a specific value that is used to stop the MBMS frequency selection procedure.

3. The method of claim 1, wherein the mobile terminal is not in CELL_DCH state means that the mobile terminal is in CELL_FACH state, in CELL_PCH state, in URA_PCH state or in idle mode.

4. The method of claim 1, wherein the MBMS frequency selection procedure uses a frequency layer convergence scheme for selecting a cell, wherein the frequency layer convergence scheme favors the selection of the cell on the preferred frequency of the MBMS service.

5. The method of claim 1, wherein the use of the frequency layer convergence scheme is interrupted upon receiving the message that initiates the reconfiguration procedure.

6. The method of claim 5, wherein a trigger for interrupting the use of the frequency layer convergence scheme is based on a procedure initiated with a network that fails while using the frequency layer convergence scheme.

7. The method of claim 6, wherein the procedure with the network comprises establishing a connection with a core network (CN) domain, wherein the CN domain is at least a packet switched (PS) domain or a circuit switched (CS) domain.

8. The method of claim 6, wherein the procedure with the network comprises at least:

a PRACH access procedure;

a radio resource control (RRC) procedure for transmitting information to the network;

a medium access control (MAC) procedure for transmitting data to the network;

or

a procedure for selecting a cell on a given frequency according to an order received from the network.

9. The method of claim 5, wherein a trigger for interrupting the use of the frequency layer convergence scheme comprises:

initiating a procedure for selecting a cell on a given frequency according to an order received from the network.

10. A mobile terminal that performs frequency selection for an MBMS (Multimedia Broadcast/Multicast Service) service, the mobile terminal comprising:

means for receiving a message that instructs an interruption of a MBMS frequency selection procedure, wherein the message initiates a reconfiguration procedure; and

means for stopping the MBMS frequency selection procedure if the mobile terminal is not in CELL_DCH state,

wherein the MBMS frequency selection procedure allows the mobile terminal to select a preferred frequency of the MBMS service.

11. The mobile terminal of claim 10, wherein the received message includes a specific value that is used to stop the MBMS frequency selection procedure.

12. The mobile terminal of claim 10, wherein the mobile terminal is not in CELL_DCH state means that the mobile terminal is in CELL_FACH state, in CELL_PCH state, in URA_PCH state or in idle mode.

13. The mobile terminal of claim 10, wherein the MBMS frequency selection procedure uses a frequency layer convergence scheme for selecting a cell, wherein the frequency layer convergence scheme favors the selection of the cell on the preferred frequency of the MBMS service.

14. The mobile terminal of claim 13, wherein the use of the frequency layer convergence scheme is interrupted upon receiving the message that initiates the reconfiguration procedure.

15. A method of transmitting a message in order for a mobile terminal to perform frequency selection for an MBMS (Multimedia Broadcast/Multicast Service) service, the method performed by a network and comprising:

transmitting the message that instructs an interruption of a MBMS frequency selection procedure, wherein the message initiates a reconfiguration procedure,

wherein the mobile terminal stops the MBMS frequency selection procedure according to the transmitted message if the mobile terminal is not in CELL_DCH state, and

wherein the MBMS frequency selection procedure allows the mobile terminal to select a preferred frequency of the MBMS service.

16. The method of claim 15, wherein the transmitted message includes a specific value that is used to stop the MBMS frequency selection procedure.

17. The method of claim 15, wherein the mobile terminal is not in CELL_DCH state means that the mobile terminal is in CELL_FACH state, in CELL_PCH state, in URA_PCH state or in idle mode.

18. The method of claim 15, wherein the MBMS frequency selection procedure uses a frequency layer convergence scheme for selecting a cell, wherein the frequency layer convergence scheme favors the selection of the cell on the preferred frequency of the MBMS service.

19. The method claim 18, wherein the use of the frequency layer convergence scheme is interrupted according to the message that initiates the reconfiguration procedure.