Link-level measurements from an 802.11b mesh network
Proceedings of the 2004 conference on Applications, technologies, architectures, and protocols for computer communications
Comparison of routing metrics for static multi-hop wireless networks
Proceedings of the 2004 conference on Applications, technologies, architectures, and protocols for computer communications
A high-throughput path metric for multi-hop wireless routing
Wireless Networks - Special issue: Selected papers from ACM MobiCom 2003
On accurate measurement of link quality in multi-hop wireless mesh networks
Proceedings of the 12th annual international conference on Mobile computing and networking
Studying wireless routing link metric dynamics
Proceedings of the 7th ACM SIGCOMM conference on Internet measurement
ETX Could Result in Lower Throughput
ICCCN '09 Proceedings of the 2009 Proceedings of 18th International Conference on Computer Communications and Networks
Correlating wireless link cost metrics to capacity
WONS'09 Proceedings of the Sixth international conference on Wireless On-Demand Network Systems and Services
| Hi-index | 0.00 |
ETX (Expected Transmission Count) is shown to be the best link metric in terms of higher throughput for wireless multi-hop network with stationary-nodes having single radio. Some recent work, however, shows that ETX may exhibit high sensitivity to interference and a single TCP flow can increase the metric value by 10000% [1]. Such a change indicates that routing protocols, based on ETX, might be playing with random numbers without bringing any significant benefits of considering link quality. It is suggested that broadcast-based estimation of ETX could be the major cause of sensitivity as other metrics based on unicast probing method did not show similar performance degradation [1]. Several proposals came forward so far focusing on better estimation techniques of ETX metric mostly using unicast probing combined with cross-layer information; however, we have not seen any investigation study as to why does broadcast-based method result in inaccurate estimation of ETX. This paper presents preliminary results of an investigation study about the sensitivity of ETX estimation based on broadcast probing and compare it with the one based on unicast probing. It is work-in-progress.