An adaptive multiple retransmission technique for continuous media streams

Retransmission can be used for loss recovery in continuous media applications but the number of retransmission attempts is bounded by the size of the playout buffer. For efficient recovery, a protocol must attempt as many retransmissions as possible but avoid late retransmissions. This typically requires that the playout buffer be sized in round-trip time (RTT) multiples plus some margin for error. RTT-based timers are then used to trigger retransmissions. However, this approach is problematic due to (i) the high variation in RTT commonly encountered in the Internet, which makes accurate estimation difficult, and (ii) the granularity of timers typically used prevents precise control. We present two new retransmission-based protocols, for unicast and multicast respectively, which eliminate RTT estimation and timer-triggered events. As a result, our protocols are immune to errors due to jitter and timer granularity and recover more losses, while better suppressing unnecessary retransmis...

• Type: Conference
• Year: 2004
• Where: NOSSDAV
• Authors: Rishi Sinha, Christos Papadopoulos
• Keywords: NOSSDAV 2004, Operating Systems, Playout Buffer, Retransmission Attempts, Timer-based Protocols