Fair Scheduling in Wireless Ad-hoc Networks of Location Dependent Channel Errors

Download or read book Fair Scheduling in Wireless Ad-hoc Networks of Location Dependent Channel Errors written by Jinran Chen and published by . This book was released on 2003 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The growth of the wireless networks has brought the issue of fair allocation of bandwidth among the users. Besides the issues in wired networks scheduling, wireless network has to take into account the characteristics of wireless channel, such as channel errors, location dependent contention, hidden or exposed stations, spatial channel reuse, and constraints in mobile hosts processing power and battery power. Medium Access Control (MAC) protocols define rules for orderly access to the shared medium and play a crucial role in the efficient and fair sharing of scarce wireless bandwidth. The IEEE standard 802.11 specifies the wireless LAN protocols for both infrastructure-based and ad-hoc networks. The previous studies in ad-hoc networks have assumed error free channel. However, in the wireless domain, a packet flow may experience location-dependent channel error and hence may not be able to complete transmission. The bursty channel errors can render the previous studies inapplicable. This study developed a fairness model for fair scheduling to deal with channel error in wireless ad-hoc networks. The throughput of the network is increased while the fairness is maintained in the model. The model was implemented in a distributed manner by localizing the global information required by the users of the networks. The simulation results showed the scheduling model achieves higher throughput and maintains the fairness at the same time.