| Publisher | Aston University | ||
|---|---|---|---|
| Format | 350.2KB PDF | Date added | 30 May 2006 |
| Topics | TCP - IP, Mobile - Wireless Communications | ||
| Downloads | 143 | ||
The rise of IEEE 802.11 Wireless Local Area Networks (WLANs) is challenging the original design of TCP. The wireless channel is very different to traditional copper media; wireless channels possess significantly higher Bit Error Rates (BERs), conditions which lead to increased numbers of random packet losses. The fundamental problem is that TCP is unable to classify the cause of loss, treating all losses as a sign of congestion within the network. Hence, it invokes congestion control algorithms to recover from the losses. This means retransmitting the lost packet, as well as throttling back the transmission rate. This paper outlines the key problems faced by TCP in such conditions, and briefly describe the techniques being used to enhance its performance.
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