CONTROL METHOD FOR UPLINK CONNECTING OF IDLE TERMINAL

• US 20100195522A1
• Filed: 08/11/2008
• Published: 08/05/2010
• Est. Priority Date: 08/10/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Seung Jun, Park, Sung Jun, Lee, Young Dae, Chun, Sung Duck
• Granted Patent: US 8,422,385 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access

Abstract

A method for controlling an uplink connection of an idle UE in a wireless communication system is disclosed. In a method for performing a random access procedure by an idle-mode user equipment (UE) which desires to receive a specific broadcast/multicast service in a wireless communication system, the method includes, receiving a first message transmitted from a network, so as to count the number of UEs which desire to receive the broadcast/multicast service, transmitting a preamble for a random access to the network, receiving a second message including uplink (UL) radio resource allocation information from the network in response to the preamble, transmitting a third message selected according to a connection indication information contained in the first or second message to the network using the uplink (UL) radio resource allocation information, wherein the connection indication information indicates whether a connection to the network is required or not, and receiving a contention resolution message from the network.

Claims

1. A method for performing a random access procedure by a user equipment (UE) in an idle-mode which desires to receive a specific broadcast/multicast service in a wireless communication system, the method comprising the steps of:

receiving a first message transmitted from a network, so as to count the number of UEs which desire to receive the broadcast/multicast service;

transmitting a preamble for a random access to the network;

receiving a second message including uplink (UL) radio resource allocation information from the network in response to the preamble;

transmitting a third message selected according to a connection indication information contained in the first or second message to the network using the uplink (UL) radio resource allocation information, wherein the connection indication information indicates whether a connection to the network is required or not; and

receiving a contention resolution message from the network.

2. The method of claim 1, wherein the first message includes at least one preamble allocated for the broadcast/multicast service.

3. The method of claim 1, wherein the first message includes a service identifier for identifying the broadcast/multicast service.

4. The method of claim 2, wherein the preamble for the random access is selected from the allocated at least one preamble.

5. The method of claim 1, wherein the first message further includes a counting indicator indicating that the first message is for counting the number of UEs which desire to receive the broadcast/multicast service.

6. The method of claim 1, wherein the connection indication information is indicated by a connection indicator or allocation/non-allocation of a UE identifier.

7. The method of claim 1, wherein, if the connection indication information indicates the connection to the network, the third message is a connection request message.

8. The method of claim 1, wherein, if the connection indication information does not indicate the connection to the network, the third message is a counting response message.

9. The method of claim 1, wherein the third message includes at least one of a UE identifier and a service identifier.

10. The method of claim 9, wherein the UE identifier is either a UE identifier allocated to the second message or a pre-allocated UE identifier, according to the connection indication information.

11. The method of claim 1, wherein the contention resolution message includes at least one of a UE identifier and a service identifier.

12. The method of claim 1, wherein the contention resolution message includes a counting stop indicator for indicating a counting process to stop.

13. The method of claim 1, wherein, if the connection indication information does not indicate the connection to the network, an acknowledgement (ACK)/non-acknowledgement (NACK) signal on the contention resolution message is not transmitted to the network.

14. A method for counting the number of UEs in an idle-mode which desire to receive a specific broadcast/multicast service in a network of a wireless communication system, the method comprising the steps of:

transmitting a first message so as to count the number of UEs which desire to receive the broadcast/multicast service;

receiving a random access preamble from a specific UE;

transmitting a second message including uplink (UL) radio resource allocation information in response to the random access preamble;

receiving a third message selected according to a connection indication information contained in the first or second message and transmitted by the UE using the uplink (UL) radio resource allocation information, wherein the connection indication information indicates whether a connection to the network is required or not; and

transmitting a contention resolution message to the UE.

15. The method of claim 14, wherein the first message includes at least one preamble allocated for the broadcast/multicast service.

16. The method of claim 14, wherein the first message includes a service identifier for identifying the broadcast/multicast service.

17. The method of claim 15, wherein the random access preamble is selected from the allocated at least one preamble.

18. The method of claim 14, wherein the first message further includes a counting indicator indicating that the first message is for counting the number of UEs which desire to receive the broadcast/multicast service.

19. The method of claim 14, wherein the connection indication information is indicated by a connection indicator or allocation/non-allocation of a UE identifier.

20. The method of claim 14 wherein, if the connection indication information indicates the connection to the network, the third message is a connection request message.

21. The method of claim 14, wherein, if the connection indication information does not indicate the connection to the network, the third message is a counting response message.

22. The method of claim 14, wherein the third message includes at least one of a UE identifier and a service identifier.

23. The method of claim 22, wherein the UE identifier is either a UE identifier allocated to the second message or a pre-allocated UE identifier, according to the connection indication information.

24. The method of claim 14, wherein the contention resolution message includes at least one of a UE identifier and a service identifier.

25. The method of claim 14, wherein the contention resolution message includes a counting stop indicator for indicating a counting process to stop.

26. The method of claim 14, wherein, if the connection indication information does not indicate the connection to the network, the contention resolution message is transmitted at least two times.