In wireless networks such as those based on IEEE 802.11, packet losses due to fading and interference are often misinterpreted as indications of congestion, causing unnecessary decrease in the data sending rate due to congestion control at higher layer protocols. For delay-constrained applications such as video teleconferencing, packet losses may result in excessive artifacts or freeze in the decoded video. This research paper proposes a simple and yet effective mechanism to detect and reduce channel-caused packet losses by adjusting the retry limit parameter of the IEEE 802.11 protocol.

Congestion-aware MAC Layer Adaptation to Improve Video Teleconferencing over Wi-Fi

With the growth rate of new-device mobile data traffic significantly greater than the growth rate of users, Wi-Fi wireless data delivery currently accounts for 20 times more of data delivery than cellular systems. Wi-Fi wireless data delivery is expected to increase exponentially through 2017. This paper provides an overview of InterDigital’s 5G Carrier Grade Wi-Fi (5G-CGW) vision to address the expanding Wi-Fi usage and describes technologies that can address the need for cellular-like quality, robust deployments and airtime efficiency.

RESEARCH PAPERS

Congestion-aware MAC Layer Adaptation to Improve Video Teleconferencing over Wi-Fi

5G Carrier Grade Wi-Fi: Requirements and Technologies