Patent ID: 7489705

Claim:
A method of controlling the transmission of a sequence of data symbols over a connection provided by a predetermined communication layer, said connection having a sending peer and a receiving peer, said predetermined sequence of data symbols being divided into a sequence of first data units on the basis of a first data unit generation scheme, said first data units being sent from said sending peer to said receiving peer, a feedback mechanism being implemented according to which the receiving peer sends feedback messages to the sending peer, said feedback messages comprising information on the receipt of data units sent by said sending peer, the sending peer keeping a first sender-side transmission record of data units in which each data unit is associated with sender-side transmission status information, the receiving peer keeping a first receiver-side transmission record of data units in which each data unit is associated with receiver-side transmission status information, the transmission control for transmission of data units over said connection being done on the basis of said sender-side transmission record, and reassembling said sequence of data symbols being done on the basis of said receiver-side transmission record, said method comprising modifying said transmission by identifying a reference data symbol in the sequence of data symbols, dividing the data symbols following said reference data symbol in the sequence of data symbols into a sequence of second data units on the basis of a second data unit generation scheme, generating a second sender-side transmission record by mapping said sender-side transmission status information associated with data units in said first sender-side transmission record onto said second data units in accordance with a predetermined mapping scheme for sender-side transmission records, generating a second receiver-side transmission record by mapping said receiver-side transmission status information associated with data units in said first receiver-side transmission record onto said second data units in accordance with a predetermined mapping scheme for receiver-side transmission records, and performing the transmission control of said second data units on the basis of said second sender-side transmission record and performing the reassembling of said sequence of data symbols on the basis of said second receiver-side transmission record.