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Investigation on One Bandwidth Adjustment-Based Wireless Mesh Network QoS Routing Protocol

Author: LiChunYang
Tutor: LiuYuanAn
School: Beijing University of Posts and Telecommunications
Course: Electromagnetic Field and Microwave Technology
Keywords: Wireless Mesh Networks WMN Quality of service with QoS Guaranteed bandwidth adjustment of the quality of service routing protocol QBR Available bandwidth
CLC: TN929.5
Type: Master's thesis
Year: 2009
Downloads: 99
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Abstract


Wireless Mesh Networks (Wireless Mesh Network, WMN) is a mobile the Adhoc network technology based on developed one for civil communication of the new broadband wireless network with high reliability , self-organization and self-healing sex . Wireless Mesh Networks by academia and industry attention Mesh routing protocols , Mesh network QoS policy and other key technologies to become the focus of the study . How to provide QoS in Wireless Mesh Networks routing mechanism is a research hotspot in recent years . Firstly, a statistical slot - based end-to-end available bandwidth estimation algorithm , can provide a more accurate calculation of the available bandwidth . The algorithm successfully existing between two points based on data slots available bandwidth estimation, extended to the end-to-end available bandwidth estimation . Collection of available transmit time slot and available to receive the introduction of slot set , can effectively avoid the hidden terminal , exposed terminal problem ; heuristic end-to-end slot scheduling strategy is well positioned to maximize the available bandwidth . The algorithm is relatively simple , good scalability , relatively easy to achieve , and can provide a more accurate criterion of available bandwidth for QoS routing information . Statistics slot - based end-to-end available bandwidth estimation algorithm and QoS theory , the paper proposes a guaranteed bandwidth adjustment based QoS Routing Protocol bandwidth adjustment - Quality of Service Routing Protocol ( QBR ) . Available bandwidth as the primary routing metric , considering the service features , user priority and network available bandwidth and other factors , the introduction of thinking seize compression , can make full use of network resources, avoid unnecessary routing reconstruction , network equilibrium to reduce the probability of the rejection . The simulation results show that , QBR routing protocol has a higher data delivery ratio , improve the quality of network transmission has obvious advantages .

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