Method and Apparatus for Reducing Jitter in a Receiver of a Selective Combining System

Abstract

A jitter reducing method in a receiver of a selective combining system includes determining a slowest cell corresponding to the receiver in the selective combining system, treating a plurality of missing packets as being received when a data stream transmitted by the slowest cell is detected to comprise the plurality of missing packets and a sequence number of a first packet in the plurality of missing packets is a sequence number of a next packet that is expected to be received in sequence, and delivering a received packet following the plurality of missing packets in sequence to an upper layer.

1 . A jitter reducing method in a receiver of a selective combining system, the method comprising: 
 determining a slowest cell corresponding to the receiver in the selective combining system;    treating a plurality of missing packets as being received, when a data stream transmitted by the slowest cell is detected to comprise the plurality of missing packets and a sequence number of a first packet in the plurality of missing packets is a sequence number of a next packet that is expected to be received in sequence; and    delivering a received packet following the plurality of missing packets in sequence to an upper layer.    
   
   
       2 . The method of  claim 1  wherein treating the plurality of missing packets as being received is incrementing the sequence number of the next packet that is expected to be received in sequence by a number of the plurality of missing packets.  
   
   
       3 . The method of  claim 2  wherein the number of the plurality of missing packets is 1.  
   
   
       4 . The method of  claim 1  wherein a timing sequence of the data stream transmitted by the slowest cell is behind or equal to timing sequences of data streams transmitted by all other cells that are capable of providing services to the receiver.  
   
   
       5 . The method of  claim 1  wherein a timing sequence of the data stream transmitted by the slowest cell is behind or equal to timing sequences of data streams transmitted by all neighboring cells that are currently capable of providing services to the receiver.  
   
   
       6 . The method of  claim 1  wherein the receiver is operating in Unacknowledged Mode (UM).  
   
   
       7 . A receiving device comprising a central processing unit in electrical communications with a memory, the memory comprising program code for implementing the method of  claim 1 .  
   
   
       8 . A jitter reducing method in a selective combining system, the method comprising: 
 determining a minimum transition time period required to change to another cell in the selective combining system; and    keeping a maximum time difference of transmitting packets between cells to be less than or equal to the minimum transition time.    
   
   
       9 . The method of  claim 8  further comprising setting a size of a duplicate avoidance and reordering function window according to the minimum transition time.  
   
   
       10 . The method of  claim 9  wherein the selective combining system is operating in Unacknowledged Mode (UM).