Application level Wireless Multi-level ECN for Video and Real-time Data

Multi-level Explicit Congestion Notification (MECN) and Wireless MECN (WMECN) are the amendments proposed in recent research to have an improved feedback from network backlog. These methods are implemented in conjunction with TCP and modify the TCP in its response to congestion. The improvement of these methods on TCP is derived from the fact that they modify the window size variations in response to congestion. Quantitative benefits of ECN, MECN and similar proposed methods for TCP have always been an issue to debate. Adding ECN to UDP API and end-to-end congestion control is also one of the topics of interest. In this paper we present a new WMECN-Like mechanism which is modified in a way that could be used by applications to adapt transmission rate or video encoding quality. Low complexity of the proposed mechanism makes it more suitable than UDP which is recommended protocol for QoS over wireless networks.