METHOD OF PERFORMING RANDOM ACCESS IN A WIRELESS COMMUNCATION SYSTEM

• US 20100067495A1
• Filed: 10/30/2007
• Published: 03/18/2010
• Est. Priority Date: 10/30/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sung Jun, Lee, Young Dae, Yi, Seung June, Chun, Sung Duck
• Granted Patent: US 8,428,013 B2
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: H04W 74/008 with additional processing of random access related information at receiving side
• 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
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method of performing random access in a wireless communication system is disclosed. The method of performing random access in a user equipment of a wireless communication system which uses multiple carriers includes transmitting a preamble for random access to a network, receiving a random access response message from the network in response to the preamble, transmitting a connection setup request message to the network, the connection setup request message requesting connection establishment with the network, and receiving a first message from the network, the first message including connection setup information and contention resolution information in a random access procedure. If a user equipment identifier of the user equipment is included in the message, the user equipment determines that it has successfully performed random access and performs a next procedure in accordance with the connection setup information. If the user equipment identifier of the user equipment is not included in the message, the user equipment determines that it has failed in random access and transmits a random access preamble to the network again after the lapse of a predetermined time period.

Claims

1. A method of performing random access in a user equipment of a wireless communication system using multiple carriers, the method comprising:

transmitting a preamble for random access to a network;

receiving a random access response message from the network in response to the preamble;

transmitting a connection setup request message to the network, the connection setup request message requesting connection establishment with the network; and

receiving a first message from the network, the first message including connection setup information and contention resolution information in a random access procedure.

2. The method of claim 1, wherein the random access response message includes a temporary user equipment identifier temporarily given to the user equipment.

3. The method of claim 2, wherein the connection setup request message includes a wideband user equipment identifier of the user equipment.

4. The method of claim 3, wherein the first message includes a wideband user equipment identifier of a user equipment succeeding in random access.

5. The method of claim 4, further comprising receiving control information for reception of the first message by using the temporary user equipment identifier through a control channel.

6. The method of claim 4, wherein the user equipment is operated in accordance with the connection setup information if the wideband user equipment identifier of the user equipment is included in the first message.

7. The method of claim 4, further comprising transmitting a random access preamble from a user equipment to the network if a wideband user equipment identifier of the user equipment is not included in the first message.

8. The method of claim 1, wherein the connection setup is radio resource control (RRC) connection setup.

9. The method of claim 3, wherein the wideband user equipment identifier is an international mobile subscriber identity (IMSI) or temporary mobile subscriber identity (TMSI).

10. A method of performing random access in a user equipment of a wireless communication system which uses multiple carriers, the method comprising:

a first step of transmitting a preamble for random access to a network in a state that the user equipment is connected with the network;

a second step of receiving a random access response message from the network in response to the preamble, the random access response message including a temporary user equipment identifier of the user equipment;

a third step of requesting the network to allocate uplink resources; and

a fourth step of receiving at least one of a resource grant message and a contention resolution message from the network by using the temporary user equipment identifier and a private user equipment identifier of the user equipment.

11. The method of claim 10, wherein the fourth step comprises:

receiving the temporary user equipment identifier through a specific control channel; and

receiving the contention resolution message indicated by the temporary user

equipment identifier.

12. The method of claim 11, further comprising receiving the resource grant message by using the private user equipment identifier if the private user equipment identifier of the user equipment is included in the contention resolution message.

13. The method of claim 10, wherein the fourth step further comprises transmitting uplink data to the network in accordance with resource allocation information included in the resource grant message if the user equipment receives the resource grant message which includes the private user equipment identifier.

14. The method of claim 11, further comprising transmitting a random access preamble to the network after the lapse of a certain time period if the private user equipment identifier of the user equipment is not included in the contention resolution message.

15. The method of claim 13, wherein the user equipment does not receive a contention resolution message indicated by the temporary user equipment identifier.

16. The method of claim 12, wherein the resource grant message is received through a control channel, and the contention resolution message is received through a data channel.

17. The method of claim 13, wherein the resource grant message is received through a control channel.

18. The method of claim 16, wherein the contention resolution message is received by being included in MAC control PDU.