METHOD FOR REPARING AN ERROR DEPENDING ON A RADIO BEARER TYPE

• US 20100246382A1
• Filed: 10/29/2008
• Published: 09/30/2010
• Est. Priority Date: 10/29/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young Dae, Park, Sung Jun, Yi, Seung June, Chun, Sung Duck
• Granted Patent: US 8,416,678 B2
• Time in Patent Office: Days
• US Class Current: 370/216
• CPC Class Codes: H04L 63/12 Applying verification of the received information cryptographic mechanisms or cryptographic arrangements for data integrity or data verification H04L9/32
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

A method of re-establishing a radio bearer in a wireless communication system is disclosed. The method of re-establishing a radio bearer of a user equipment in a wireless communication system comprises establishing a radio bearer; identifying whether an error has occurred in the radio bearer; and selectively re-establishing the radio bearer or all radio bearers of the user equipment in accordance with a type of the radio bearer if the error has occurred in the radio bearer.

Claims

1. A method of re-establishing a radio bearer of a user equipment in a wireless communication system, the method comprising:

establishing a radio bearer;

identifying whether an error has occurred in the radio bearer; and

selectively re-establishing the radio bearer or all radio bearers of the user equipment in accordance with a type of the radio bearer if the error has occurred in the radio bearer.

2. The method of claim 1, wherein the error is a security failure.

3. The method of claim 2, wherein identifying whether the security failure has occurred is determined by identifying whether a predetermined number of packet data have continuously failed in header compression or integrity verification.

4. The method of claim 1, wherein, if the type of the radio bearer is a data radio bearer, the data radio bearer is only re-established.

5. The method of claim 4, wherein re-establishing the data radio bearer includes synchronizing desynchronized parameter values between the user equipment and a network with each other.

6. The method of claim 5, wherein the desynchronized parameter values are hyper frame numbers (HFN).

7. The method of claim 5, wherein synchronizing desynchronized parameter values is performed through packet data convergence protocol (PDCP) data unit or radio resource control (RRC) signaling.

8. The method of claim 5, wherein synchronizing desynchronized parameter values includes:

receiving a first message which indicates that a security error has occurred in the data radio bearer;

re-configuring the desynchronized parameter values of the data radio bearer where the security error has occurred, to a previously determined specific value; and

transmitting a second message in response to the first message.

9. The method of claim 5, wherein synchronizing desynchronized parameter values includes:

receiving a first message which indicates that a security error has occurred in the data radio bearer and also indicates a specific value associated with the desynchronized parameter values;

re-configuring the desynchronized parameter values of the data radio bearer where the security error has occurred, to a previously determined specific value; and

transmitting a second message in response to the first message.

10. The method of claim 5, wherein synchronizing desynchronized parameter values includes:

receiving a first message which indicates that a security error has occurred in the data radio bearer; and

transmitting a second message, which indicates a specific value associated with the desynchronized parameter values, in response to the first message.

11. The method of claim 9, wherein the specific value is at least one of a transmitting HFN and a receiving HFN.

12. The method of claim 1, wherein, if the type of the specific radio bearer is a signaling radio bearer, all radio bearers of the user equipment are re-established.

13. The method of claim 1, wherein re-establishing all radio bearers of the user equipment includes re-establishing RRC connection.

14. The method of claim 10, wherein the specific value is at least one of a transmitting HFN and a receiving HFN.