METHOD FOR HANDLING DATA DISCARD TIMER AFTER AN RLC RESET OR RE-ESTABLISHMENT IN A WIRELESS COMMUNICATIONS SYSTEM

• US 20070091895A1
• Filed: 11/29/2006
• Published: 04/26/2007
• Est. Priority Date: 08/13/2002
• Status: Active Grant

• Current Assignee: Innovative Sonic Limited
• Original Assignee: Innovative Sonic Limited
• Inventors: Wu, Chih-Hsiang
• Granted Patent: US 7,554,963 B2
• Time in Patent Office: Days
• US Class Current: 370/394
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/187 Details of sliding window management
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 67/00 Network arrangements or protocols for supporting network services or applications user-to-user messaging H04L51/00; network arrangements, protocols or services for supporting real-time applications in data packet communications networks H04L65/00
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04L 69/28 Timers or timing mechanisms used in protocols
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 80/02 Data link layer protocols

Abstract

A method for handling timers in a wireless communications system includes receiving a Service Data Unit (SDU) and starting a Timer_Discard timer associated with the SDU, performing a reset procedure for a Radio Link Control Acknowledged Mode entity, and not stopping the Timer_Discard timer if the SDU is not discarded in response to the reset procedure.

Claims

1. A method for handling a Timer_Discard timer, in a wireless communications system, the method comprising:

receiving a Service Data Unit (SDU) and starting the Timer_Discard timer associated with the SDU;

performing a reset procedure for a Radio Link Control Acknowledged Mode (RLC AM) entity; and

not stopping the Timer_Discard timer if the SDU is not discarded in response to the reset procedure.

2. The method of claim 1 further comprising:

maintaining a value of the Timer_Discard timer if the Timer_Discard timer expires prior to the completion of the reset procedure;

stopping the Timer_Discard timer if the SDU is discarded in response to the reset procedure; and

restarting the Timer_Discard timer, or maintaining a value of the Timer_Discard timer and maintaining operation of the Timer_Discard timer if the SDU is not discarded in response to the reset procedure.

3. The method of claim 1 further comprising stopping the Timer_Discard timer if the SDU is discarded and if a condition for triggering the reset procedure is detected.

4. A method for handling a Timer_Discard timer in a wireless communications system, the method comprising:

receiving a Service Data Unit (SDU) and starting the Timer_Discard timer associated with the SDU;

re-establishing the RLC AM entity; and

stopping the Timer_Discard timer after re-establishment of the RLC AM entity if the SDU is discarded in response to the re-establishment procedure.