Congestion-Aware Rate Adaption in Wireless Networks: A Measurement-Driven Approach

P. Acharya, A. Sharma, E. Belding, K. Almeroth and K. Papagiannaki

Channel Busy Time is used to detect congestion.A functionality of the MadWifi driver is used to obtain CBT in real time. It is also detailed how the ill-implemented auto-rate fallback aggravates the congestion situation. A new rate adaptation mechanism is proposed and the overall performance is notoriously improved in congested networks.

Can I add a VoIP call?

Garg and Kappes

So many interesting things in five pages.

The main limitation comes from packet loss, reported to be 16%.

Quoting:While in wired networks (such as Ethernet) choice of codecs is highly effective in dealing wiith network load, in 802.11 networks, this is not the case.

Performance Analysis of the IEEE 802.16 Wireless Metropolitan Area Network

Worth reading to learn a bit about .16. The results and plots are naive.

A WAITING-TIME DEPENDENT BACKOFF ALGORITHM FOR QOS ENHANCEMENT OF VOICE OVER WLAN

Jing Chi Yajuan Wang Bo Xia Ruozhou Lin Xian Gao

The authors propose to adjust the backoff window as a function of the time that the packet has been waiting to be sent. After a certain threshold, the backoff window is reduced for each new attempt. When the packet has been excessive delayet, it is simply discarded.

Detecting MAC Layer Collision Abnormalities in CSMA/CA Wireless Networks

Alberto López Toledo, Xiaodong Wang

Really interesting. I have some minor doubts that I would ask to Alberto when I have the chance.