Patent ID: 8538437

Claim:
A method of performing a handover of a data unit based communication from a first connection, between a first sender and a receiver, to a second connection between a second sender and said receiver, comprising: sending a sequence of data units on the first connection; discontinuing said communication over said first connection and continuing said communication over said second connection, prior to discontinuing the communication over said first connection, providing data units, including a reference data unit, destined for said receiver to both said first sender and said second sender, indicating to said receiver, as part of the handover, the reference data unit among those provided data units provided to both said first sender and said second sender, said receiver, based on said reference data unit, keeping a record for identifying such data units among those data units provided to both said first sender and said second sender that were sent over said first connection and successfully received by said receiver, wherein said receiver uses said record to silently discard data units being received over said second connection that are among those data units provided to both said first and said second sender and that were successfully received by said receiver over said first connection.