[talk] Exploiting WLAN Deployment Density: Fair WLAN Backhaul Aggregation
by Alberto Toledo
show details
Details
| abstract: | In urban environments, residential users can potentially see multiple 802.11 APs in range with high quality, usually connected to broadband links. As the speeds of 802.11 WLAN are typically an order of magnitude higher than those of standard broadband connections, one can use a single 802.11 wireless card to aggregate the bandwidth of multiple AP backhauls in range by virtualizing the card and cycling over the APs in a TDMA fashion. Such multi-AP aggregation scheme has been considered as a way of bypassing the backhaul capacity limit. However, current AP aggregation solutions greedily maximize the individual station throughput without taking fairness into account. This can lead to gross unfair throughput distributions, which can discourage user participation and severely limit commercial deployability. Motivated by this problem, I will present THEMIS, a single-radio station that performs multi-AP backhaul aggregation in a fair and distributed way, without requiring modifications to the existing APs. THEMIS is implemented on commodity hardware, evaluated extensively through controlled experimental tests, and validated in a deployment spanning 3 floors of a multistory building. THEMIS is being used in a commercial trial by a major broadband provider to its customers. THEMIS brings one step closer the possibility of using existing WiFi deployments for several commercial settings, ranging from community-based virtual ISPs to efficient 3G-offloading schemes. This work will be presented at the Mobicom 2010 conference. |
|
|
You need to log in to add tags and post comments.
