Comparison of Wireless Token Ring Protocol with IEEE 802.11

Mustafa Ergen ； Duke Lee ； Ruchira Datta ； Jeff Ko ； Anuj Puri ； Raja Sengupta ； Pravin Varaiya

《網際網路技術學刊》 4卷4期 (2003/10) Pp. 261-275

並列摘要

Wireless Token Ring Protocol (WTRP) is a medium access control (MAC) protocol for wireless networks. The MAC protocol through which mobile stations can share a common broadcast channel is essential in wireless networks. In IEEE 802.11 network, the contention among stations is not homogeneous due to the existence of hidden terminals, partially connected network topology, and random access. Consequently, quality of service (Qos) is not provided. WTRP supports guaranteed Qos in terms of bounded latency and reserved bandwidth which are crucial real time constraints of the applications. WTRI is efficient in the sense that it reduces the number of retransmissions due to collision. It is fair in the sense that each station use the channel for equal amount of time. The stations take turn to transmit and are forced to give up the right to transmit after transmitting for a specified amount of time. It is a distributed protocol that supports many topologies since not all stations need to be connected to each other or to a central station. WTRP is robust against single node failure. WTRP recovers gracefully from multiple simultaneous faults. WTRP has applications to inter-access point coordination in ITS DSRC, safety-critical vehicle-to-vehicle networking, home networking and provides extensions to sensor networks and Mobile IP.

並列關鍵字

Medium Access Control ； Wireless Token Ring Protocol ； IEEE802.11 ； IEEE802.4 ； Quality of Service ； Intelligent Transportation Systems ； Automated Highway Project ； Mission Critical Systems ； Home Networking