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Research on the QoS Assurance Method of IEEE 802.16 Mesh Networks

Author: ZhangXin
Tutor: LiYun
School: Chongqing University of Posts and Telecommunications
Course: Signal and Information Processing
Keywords: IEEE 802.16 Mesh QoS Resource reservation
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 35
Quote: 1
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Abstract

With broadband wireless access technology plays an increasingly important role in people's lives, the broadband wireless metropolitan area network IEEE 802.16 its coverage, and QoS to support a variety of different types of business characteristics and is recognized as the most one of the potential of broadband wireless access technology. Advantage of its PMP and Mesh MAC layer supports two modes, Mesh mode of its transmission distance and lower the cost of network construction, flexible networking, reliability and user throughput in multi-hop environment Mesh has become the wireless network theoretical research hotspot. First, the article describes the basics of the generation of IEEE 802.16 broadband wireless access standards development and networking topology, which focuses on IEEE 802.16 Mesh Mode MAC frame structure, a handshake mechanism and MSH-DSCH message format; Secondly, made a more detailed description of the QoS aspects related to the basic theory and several typical wireless network QoS Research, which focuses on IEEE802.16 network QoS assurance mechanism; once again, due to the existing IEEE 802.16 Mesh Network the QoS methods often are by the hop-by-hop combined with the three-way handshake forwarding mechanism to achieve (We called the resource reservation HBRP hop by hop), and thus lead to business end-to-end resource reservation to guarantee delay and signaling overhead significantly increased a lot, so this article will focus on the study of the following two questions: 1) IEEE 802.16 Mesh mode based on multi-hop resource reservation QoS guarantee method of the M-HBRP. Reserved for the existing by-hop resource is characterized by multi-hop method HBRP Mesh Networks, this paper presents an adaptation QoS guarantee multi-hop network resource reservation method. The known link, after receiving the request message to the upstream node, the local node, while return to its authorization message to the downstream node sends a request message to the reserved data minislot. NS simulation results show that this method can effectively improve the QoS performance of the network, reduce the end-to-end delay, throughput increases; 2) IEEE 802.16 Mesh mode the QoS guaranteed method study EBRP based on end-to-end resources reserved. The method is a combination of end-to-end available bandwidth calculated using forward known link bandwidth, reverse the core idea of ??the bandwidth reservation in order to achieve the end-to-end resource reservation to guarantee QoS. Performance analysis with NS simulation verify the validity and reliability of this method, compared to the hop-by-hop the resources earmarked method HBRP the EBRP makes network QoS performance has been significantly improved.

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