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Research of Vertical Handoff in Heterogeneous Network Based on SCTP

Author: FuXiaoQiang
Tutor: FangXuMing
School: Southwest Jiaotong University
Course: Communication and Information System
Keywords: Stream Control Transmission Protocol Vertical handover Linux Bandwidth estimation Network Address Translation
CLC: TN929.5
Type: Master's thesis
Year: 2010
Downloads: 136
Quote: 1
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Abstract


With the mobile communications industry, the increasingly rapid development, the endless variety of wireless network access technologies to meet the communication needs of different distances, rates and service levels. Ubiquitous communication needs expansion heterogeneous wireless networks to provide users with seamless business support seamless roaming between heterogeneous networks and vertical handoff mobility management technology to become a future all-IP architecture issues that must be addressed in the next generation network. IETF Signaling Transport (IETF Sig Tran) working group developed SCTP (Stream Control Transmission Protocol) technology standard, it Multihomed (Multi-homing) features vertical handover for heterogeneous network transport layer solutions. SCTP maintain a transparent interface without additional support from the underlying network services to the upper and lower, the ideal solution for rapid implementation of heterogeneous networks seamlessly business. In this new field, most of the research at home and abroad is still in the theoretical and simulation stage, promotion and optimization of SCTP in real network is still lagging behind, mainly in the following aspects: (1) the lack of a real physical network SCTP handover process optimization and switch test bed platform design guidelines; (2) transport layer congestion control mechanism to switch execution path bandwidth optimization and switching design guidelines often require as control parameters, while in the SCTP protocol stack the related implementations lack of path bandwidth estimation mechanisms; (3) common NAT (Network Address Translation) IP network equipment mostly does not provide support for SCTP protocol, SCTP packet transmission caused by blocking problem affecting the promotion of the SCTP protocol . SCTP protocol stack in the Linux kernel source code to be modified and extended to achieve a solution of the above problems. The results of this work on the promotion and optimization improvements in the real network system based on the SCTP heterogeneous network solutions have a positive contribution. Chapter 1 of the thesis for vertical handover in heterogeneous network development background and network level solutions analysis and discussion of the strengths and weaknesses, and the contribution of this thesis and the organizational structure arrangements. Chapter 2 comprehensively describes the main concepts and key issues of the field of vertical handover in heterogeneous networks, and background knowledge of the SCTP protocol introduced. Chapter 3 discusses the switch test bed SCTP-based heterogeneous network architecture design and function to achieve. Chapter 4 SCTP two bandwidth estimation mechanism analysis and extended implementation LKSCTP project. Chapter 5 for SCTP packets through the NAT device encountered three problems analyzed solution in Linux platform. Concluded its entirety and hope for the future work.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
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