Dynamic TCP Proxies: Coping with Disadvantaged Hosts in MANETs

Applications in mobile ad-hoc networks can suffer from poor link quality and degraded network services. In particular, standard TCP over low-quality, long routing paths, can have disproportionally low throughput as the result of a double penalty: long end-to-end round-trip time—due to long path length, and frequent congestion window backoff due to packet losses that could not be masked by the linklayer retransmissions. To address this problem, we leverage a well-known concept of dynamic TCP proxies but propose to dynamically install these proxies along a routing path based on the quality of the links comprising the path. By enclosing poor quality path segments between a pair of TCP proxies, we isolate the effect of these segments on the rest of the network and improve the overall performance. We further utilize cross-layer optimization to select proxy locations without a separate signaling protocol, by leveraging existing messages in the underlying routing protocol. We demonstrate t...

• Type: Conference
• Year: 2009
• Where: ICDCSW
• Authors: Tu Ouyang, Shudong Jin, Michael Rabinovich
• Keywords: Distributed And Parallel Computing, Dynamic Tcp Proxies, ICDCSW 2009, Routing Path, TCP Proxies