Methods and apparatus for processing error control messages in a wireless communication system

Abstract

Methods and apparatus for processing error control messages, such as RLC ARQ control messages, are disclosed. An exemplary method comprises signaling a medium access controller (MAC) that link resources are needed for transmitting data, receiving an indication from the MAC that link resources for transmitting the data are scheduled, and generating an error control message after receiving said indication, based on a current error control status. The error control message is then forwarded to the MAC for transmission. Because the generation of an error control message is delayed until resources for its transmission are scheduled, the queuing of stale control messages is avoided.

1 . A method for processing error control messages in a wireless communication system, the method comprising:
 signaling a medium access controller that link resources are needed for transmitting data;   receiving an indication from the medium access controller that link resources for transmitting the data are scheduled;   responsive to the indication, generating an error control message based on a current error control status; and   forwarding the error control message to the medium access controller for transmission.   
     
     
         2 . The method of  claim 1  wherein the error control message comprises an automatic repeat request (ARQ) status report message. 
     
     
         3 . The method of  claim 1  wherein the error control message comprises a re-transmission request. 
     
     
         4 . The method of  claim 1  wherein the error control message comprises an automatic repeat request (ARQ) poll message. 
     
     
         5 . The method of  claim 1  further comprising starting an error control tinier responsive to the indication that link resources are available for transmitting the error control message. 
     
     
         6 . The method of  claim 5  wherein the error control timer comprises one of a poll-retransmit timer and a status-prohibit timer. 
     
     
         7 . The method of  claim 1  further comprising:
 receiving a notification that transmission of the error control message has begun; and 
 starting an error control timer responsive to the notification. 
 
     
     
         8 . The method of claim I further comprising:
 receiving a notification that the error control message has been acknowledged; and   starting an error control timer responsive to the notification.   
     
     
         9 . A wireless communications apparatus comprising:
 a radio transceiver;   a medium access controller operatively connected to the radio transceiver; and   a radio link controller operatively connected to the medium access controller, wherein the radio link controller is configured to:
 signal the medium access controller that link resources are needed for transmitting data; 
 receive an indication from the medium access controller that link resources for transmitting the data are scheduled; 
 responsive to the indication, generate an error control message based on a current error control status; and 
 forward the error control message to the medium access controller for transmission via the radio transceiver. 
   
     
     
         10 . The wireless communications apparatus of  claim 9  wherein the error control message comprises an automatic repeat request (ARQ) status report message. 
     
     
         11 . The wireless communications apparatus of  claim 9  wherein the error control message comprises a re-transmission request. 
     
     
         12 . The wireless communications apparatus of  claim 9  wherein the error control message comprises an automatic repeat request (ARQ) poll message. 
     
     
         13 . The wireless communications apparatus of  claim 9  wherein the radio link controller is further configured to start an error control timer responsive to the indication that link resources are available for transmitting the error control message. 
     
     
         14 . The wireless communications apparatus of  claim 13  wherein the error control timer comprises one of a poll-retransmit timer and a status-prohibit timer. 
     
     
         15 . The wireless communications apparatus of  claim 9  wherein the radio link controller is further configured to:
 receive a notification from the medium access controller that transmission of the error control message has begun; and 
 start an error control timer responsive to the notification. 
 
     
     
         16 . The wireless communications apparatus of  claim 9  wherein the radio link controller is further configured to:
 receive a notification from the medium access controller that the error control message has been acknowledged; and 
 start an error control timer responsive to the notification.