A Review on Qos Oriented Congestion Control and Load Balancing Algorithms over WiMAX

computer engg.

WiMAX technology is presently one of the most promising global telecommunication systems. Great hopes and important investments have been made for WiMAX, which is a Broadband Wireless Access System having many applications: fixed or last-mile wireless access, backhauling, mobile cellular network, telemetering, etc. WiMAX is based on the IEEE 802.16 standard, having a rich set of features. This standard defines the Medium Access Layer and the Physical Layer of a fixed and mobile Broadband Wireless Access System. WiMAX to provide high-speed access to the Internet where the transmission control protocol (TCP) is the core transport protocol. Unlike routing, where packets are relayed hop-by-hop toward their destination, TCP actually provides reliable end to-end transmission of transport-level segments from source to receiver. As TCP was designed for wired networks it considers that all packet loss in the network is due to congestion. Wireless medium is more exposed to transmission errors and sudden topological changes. In this paper, we provides a comprehensive studies of different reliable transport layer congestion control variants of TCP is done and in addition, the current issues and future challenges that are involved in this exciting area of research are also included.

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