Retransmission Strategies for Wireless Connections with Resource-Limited Devices

Protocols designed to provide error-free communications over lossy links, at both data link and transport layers, commonly employ the idea of sliding windows, which is based on the Go-Back-N automatic repeat request (ARQ) scheme. Unless the packet error rate is extremely small, this scheme is known to perform poorly in connections with high bandwidth and round-trip delay. The methods usually employed to address this drawback, such as selective repeat (SR) feedback and forward error correction (FEC), carry a cost in terms of memory requirements (e.g. buffers for out-of-order packets), implementation complexity, and extra computation time, and therefore energy consumption. While this is not a major consideration in traditional wired networks, it implies that such methods are unsuitable for certain applications involving wireless devices with severe resource limitations, e.g. in sensor networks. In this work, we focus on low-key bufferless receivers, incapable of accepting out-of-order p...

• Type: Conference
• Year: 2005
• Where: QSHINE
• Authors: Lavy Libman
• Keywords: Go-Back-N Automatic Repeat, Out-of-order Packets, Packet Error Rate, QSHINE 2005, Wireless Networks