Buffer Sizing 802.11 Based Networks

We consider the sizing of network buffers in 802.11 based networks. Wireless networks face a number of fundamental issues that do not arise in wired networks. We demonstrate that the use of fixed-size buffers in 802.11 networks inevitably leads to either undesirable channel under-utilisation or unnecessary high delays. We present two novel dynamic buffer sizing algorithms that achieve high throughput while maintaining low delay across a wide range of network conditions. Experimental measurements demonstrate the utility of the proposed algorithms in a production WLAN and an lab testbed.

We implemented the proposed algorithms in both NS-2 and Madwifi driver. The code can be downloaded from here.

Have fun!

Tianji Li
The Hamilton Institute, NUIM, Ireland
25 Jun. 2008.

Free counter and web stats