Patent ID: 6519223
Filing Date: 2003-02-11
Classification: H04L

Abstract:
A telecommunications system for transmitting data packets using a semi-reliable retransmission protocol that utilizes selective repeat automatic repeat request, comprising:a transmitter having a data link layer therein for receiving a service data unit containing a plurality of said data packets, said data link layer segmenting said service data unit into at least one protocol data unit; a discard timer within said transmitter for monitoring a retransmission time of said at least one protocol data unit, said discard timer being initialized when said service data unit is received by said data link layer; and a receiver for receiving said at least one protocol data unit from said transmitter over an air interface and transmitting an acknowledgment message to said transmitter over said air interface after determining that said at least one protocol data unit is received correctly, said service data unit being discarded by said transmitter and said receiver when said acknowledgment message is not transmitted for said at least one protocol data unit and said discard timer expires.