Improving performance of TCP over wireless networks

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.Includes bibliographical references: p. 60-63.TCP has been designed and tuned to perform well on a phics. wired network made up of links with low bit-error rates. Wireless networks and heterogeneous networks consisting of wired and wireless links have many different characteristics compared to traditional wired networks. TCP assumes that the cause of a packet loss is congestion. When a TCP sender finds out about a packet loss, it invokes congestion control algorithms and reduces the rate of the data input to the network. In traditional wired networks where corruption of data is a rare event, this assumption is valid. However, with wireless links, higher bit error rates are not uncommon. In this work, we study the problems associated with using TCP over wireless networks. The thesis evaluates an approach for improving the performance of TCP over wireless networks, using wireless link-level retransmissions and delayed dupacks. It requires no modifications at Base station or Sender, maintains end-to-end reliability, and is simple to implement