Radio Resource Control-Service Data Unit Reception

Abstract

A method for receiving periodic transmissions of a segmented communication is disclosed. The segmented communication is received and each segment of the segmented communication is examined to determine if the segment is valid. Valid segments are stored, while invalid segments are discarded. Next, it is computed when the invalid segments will be retransmitted. A subsequent transmission of the communication is received and a retransmission of a previously identified invalid segment is extracted, the retransmitted segment being located based on the computation. The retransmitted segment is examined to determine if it is valid.

1 . A method for receiving periodic transmissions of a segmented communication, comprising:
 receiving the segmented communication;   examining each segment of the segmented communication to determine if the segment is valid;   storing a valid segment;   discarding an invalid segment;   computing when the invalid segments will be retransmitted;   receiving a subsequent transmission of the communication;   extracting a retransmission of a previously identified invalid segment, the retransmitted segment being located based on the result of the computing; and   repeating the examining.   
   
   
       2 . The method according to  claim 1 , wherein the examining includes:
 detecting an error in a segment by using an error code included with each segment; and   determining a segment number of each segment in which an error was detected.   
   
   
       3 . The method according to  claim 1 , wherein the examining includes:
 determining whether a segment has not been received, based on other segments of the communication that have been received.   
   
   
       4 . The method according to  claim 1 , wherein the subsequent transmission occurs after a predetermined repetition rate. 
   
   
       5 . The method according to  claim 1 , wherein each segment includes a value tag. 
   
   
       6 . The method according to  claim 5 , wherein each transmission of the segmented communication has an equivalent value tag. 
   
   
       7 . The method according to  claim 5 , wherein the stored valid segments are discarded if a retransmission of the segmented communication has a different value tag. 
   
   
       8 . The method according to  claim 1 , wherein the segmented communication includes broadcast control channel system information blocks. 
   
   
       9 . A user equipment configured to receive a periodically transmitted segmented communication, comprising:
 a receiver configured to receive the segmented communication;   a processor configured to:
 examine each segment of the segmented communication to determine if the segment is valid; 
 discard an invalid segment; and 
 compute when the invalid segments will be retransmitted; and 
   a memory configured to store valid segments.   
   
   
       10 . The user equipment according to  claim 9 , wherein said processor is further configured to:
 detect a segment number in a segment using an error code included with each segment; and   determine a segment number of each segment in which an error was detected.   
   
   
       11 . The user equipment according to  claim 9 , wherein said processor is further configured to:
 determine whether a segment has not been received, based on other segments of the communication that have been received.   
   
   
       12 . The user equipment according to  claim 9 , wherein each subsequent transmission of the segmented communication occurs after a predetermined repetition rate. 
   
   
       13 . The user equipment according to  claim 9 , wherein each segment includes a value tag. 
   
   
       14 . The user equipment according to  claim 13 , wherein each transmission of the segmented communication has an equivalent value tag. 
   
   
       15 . The user equipment according to  claim 13 , wherein said processor is further configured to discard the valid segments stored in said memory if a subsequent retransmission of the segmented communication has a different value tag. 
   
   
       16 . The user equipment according to  claim 9 , wherein the segmented communication includes broadcast control channel system information blocks.