Hidden Route Aware QoS Routing (HQR) for Mobile Ad Hoc Networks
Date Issued
2004
Date
2004
Author(s)
Hsu, Chia-Hao
DOI
en-US
Abstract
This thesis proposes a quality-of-service (QoS) routing protocol for multimedia applications with bandwidth and delay guarantees, in mobile ad hoc networks (MANETs). The considered MAC protocol is the distributed coordination function (DCF) specified in the IEEE 802.11. A new distributed MAC protocol, called enhanced DCF (EDCF) which has been developed by IEEE 802.11 working group to support service differentiation, is also taken into consideration. We introduce an analytical model to estimate the capacity and delay of MAC layer (both DCF and EDCF). By utilizing the estimation functions, the proposed QoS routing protocol discovers a route for a specific source-destination transmission pair with bandwidth and delay guarantees. The procedures of neighborhood maintenance, QoS violation detection, and route maintenance are also presented. Furthermore, we introduce a new problem called the hidden route problem, which is arising because of existing routes that are hidden for the current route discovery procedure. The problem is also solved in the proposed QoS routing protocol. We use the ns-2 simulator to evaluate the performance of the proposed QoS routing protocol and compare it with other ad hoc QoS routing protocols. Simulation results show that the performance, such as packet delivery ratio, average end-to-end packet delay, and routing overhead, outperforms than other existing QoS routing protocols under various network conditions.
Subjects
服務品質保證
路由協定
QoS routing
hidden route problem
MANETs
Type
thesis
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