tailieunhanh - Báo cáo hóa học: " Supporting QoS in MANET by a Fuzzy Priority Scheduler and Performance Analysis with Multicast Routing Protocols"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Supporting QoS in MANET by a Fuzzy Priority Scheduler and Performance Analysis with Multicast Routing Protocols | EURASIP Journal on Wireless Communications and Networking 2005 3 426-436 2005 C. Gomathy and S. Shanmugavel Supporting QoS in MANET by a Fuzzy Priority Scheduler and Performance Analysis with Multicast Routing Protocols C. Gomathy Telematics Lab Department of Electronics and Communication Engineering Anna University Chennai-600 025 India Email cgomathy@ S. Shanmugavel Department of Electronics and Communication Engineering Anna University Chennai-600 025 India Email ssvel@ Received 5 November 2004 Revised 9 March 2005 Recommended for Publication by George Karagiannidis Mobile ad hoc network is an autonomous system of mobile nodes characterized by wireless links. The major challenge in ad hoc networks lies in adapting multicast communication to environments where mobility is unlimited and failures are frequent. Such problems increase the delays and decrease the throughput. To meet these challenges to provide QoS and hence to improve the performance a scheduler can be used. In this paper we design a fuzzy-based priority scheduler to determine the priority of the packets. The performance of the scheduler is studied with the multicast routing protocols. The scheduler is evaluated in terms of the quantitative metrics such as packet delivery ratio and average end-to-end delay and the results are found to be encouraging. Keywords and phrases mobile ad hoc networks scheduling algorithms multicast routing protocols fuzzy logic. 1. INTRODUCTION Ad hoc network is a collection of wireless nodes which form a temporary network without relying on the existing network infrastructure or centralized administration. Ad hoc networks form a multihop network where the communication is over the wireless channel hopping over several mobile nodes. In recent years a number of unicast routing protocols have been proposed. Multicasting routing and packets forwarding in ad hoc networks is a fairly unexplored area. In today s network data transmission between multiple .