A Credit-based Home Access Point (CHAP) to Improve Application Performance on IEEE 802.11 Networks

A Credit-based Home Access Point (CHAP) to Improve Application Performance on IEEE 802.11 Networks


Choong-Soo Lee, Mark Claypool and Robert Kinicki

In Proceedings of the First ACM Multimedia Systems Conference (MMSys)
Scottsdale, AZ, USA
February 22-23, 2010


The increasing availability of high speed Internet and the decreasing cost of wireless technologies has increased the number of devices in the home that wirelessly connect to the Internet. While home users often run applications with different network requirements, the applications receive the same treatment from the wireless access point (AP). It has been shown that delay sensitive applications such as VoIP, remote login and online games suffer from increased latency in the presence of throughput intensive applications such as file sharing and downloads. Typically, there are few mechanisms available at the wireless AP to mitigate these effects other than explicitly classifying traffic based on port numbers or host IP addresses. We propose a Credit-based Home Access Point (CHAP) that features a credit-based queue management technique designed to eliminate the need for explicit configuration of per-application quality. CHAP dynamically adjusts the priority of flows from different devices to better satisfy their application requirements based on the wireless conditions. Preliminary evaluation of CHAP compared with standard DropTail and Strict Priority Queuing (SPQ) shows the merits of our approach.


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