Method and apparatus for validating radio resource control messages

Abstract

A method for validating radio resource control (RRC) messages includes determining whether an RRC message received by a wireless transmit-receive unit (WTRU) is valid based on: an RRC state for which the WTRU is configured, whether or not the WTRU needs a new transport format combination set, and whether or not the RRC message will configure the WTRU for a CELL_DCH state. A WTRU includes a rule application device configured to implement the method.

What is claimed is: 
     
         1 . A method for validating radio resource control (RRC) messages, comprising:
 determining whether an RRC message received by a wireless transmit-receive unit (WTRU) is valid based on:
 an RRC state for which the WTRU is configured; 
 whether or not the WTRU needs a new transport format combination set (TFCS); and 
 whether or not the RRC message will configure the WTRU for a CELL_DCH state. 
   
     
     
         2 . The method of  claim 1  further comprising:
 accepting the RRC message on a condition that the RRC message is valid; and 
 rejecting the RRC message on a condition that the RRC message is not valid. 
 
     
     
         3 . The method according to  claim 1 , wherein the RRC message is valid on a condition that the WTRU receives a new TFCS. 
     
     
         4 . The method according to  claim 1 , wherein the RRC message is valid on a condition that the RRC message will not configure the WTRU for the CELL_DCH state. 
     
     
         5 . The method according to  claim 1 , wherein the RRC message is valid on a condition that:
 the RRC message will configure the WTRU for the CELL_DCH state; and   the WTRU does not need a new TFCS.   
     
     
         6 . A wireless transmit/receive unit (WTRU), comprising:
 a rule application device, configured to determine whether an RRC message received by the WTRU is valid based on:
 an RRC state for which the WTRU is configured; 
 whether or not the WTRU needs a new transport format combination set (TFCS); and 
 whether or not the RRC message will configure the WTRU for a CELL_DCH state. 
   
     
     
         7 . The WTRU of  claim 6 , further comprising:
 a message accepting device, configured to accept the RRC message on a condition that the RRC message is valid; and   a message rejecting device, configured to reject the RRC message on a condition that the RRC message is not valid.   
     
     
         8 . The WTRU according to  claim 6 , wherein the rule application device is configured to determine that the RRC message is valid on a condition that the WTRU receives a new TFCS. 
     
     
         9 . The WTRU according to  claim 6 , wherein the rule application device is configured to determine that the RRC message is valid on a condition that the RRC message will not configure the WTRU for the CELL_DCH state. 
     
     
         10 . The WTRU according to  claim 6 , wherein the rule application device is configured to determine that the RRC message is valid on a condition that:
 the RRC message will configure the WTRU for the CELL_DCH state; and   the WTRU does not need a new TFCS.   
     
     
         11 . The WTRU according to  claim 6 , wherein the rule application device is further configured to:
 determine whether the RRC message will configure the WTRU for a CELL_DCH state; and   determine whether the WTRU needs a new TFCS based on the RRC message.