PEEC: a channel-adaptive feedback-based error

Reliable transmission is a challenging task over wireless LANs since wireless links are known to be susceptible to errors. Although the current IEEE802.11 standard ARQ error control protocol performs relatively well over channels with very low bit error rates (BERs), this performance deteriorates rapidly as the BER increases. This paper investigates the problem of reliable transmission in a contention free wireless LAN and introduces a Packet Embedded Error Control (PEEC) protocol, which employs packet-embedded parity symbols instead of ARQbased retransmission for error recovery. Specifically, depending on receiver feedback, PEEC adaptively estimates channel conditions and administers the transmission of (data and parity) symbols within a packet. This enables successful recovery of both new data and old unrecovered data from prior transmissions. In addition to theoretically analyzing PEEC, the performance of the proposed scheme is extensively analyzed over real channel traces collected...

• Type: Journal
• Year: 2008
• Where: JSAC
• Authors: Sohraab Soltani, Hayder Radha
• Keywords: Error Control, JSAC 2008, PEEC, Reliable Transmission