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Research on Key Techniques of Mobile Ad Hoc Network

Author: ShengMin
Tutor: LiJianDong
School: Xi'an University of Electronic Science and Technology
Course: Communication and Information System
Keywords: Mobile Ad Hoc Networks Multiple Access Protocol Routing algorithm Quality of service (QoS) The relative density of flooding broadcast Saturation throughput Access delay
CLC: TN929.5
Type: PhD thesis
Year: 2003
Downloads: 828
Quote: 8
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Abstract


Mobile Ad Hoc Networks is a network with development potential, is a complex system, involved very extensive, there are still some issues need to be thoroughly studied, and new applications continue its research and development presented a new challenge. In this paper, for multiple access technology in Mobile Ad Hoc Networks routing technology, as well as flooding broadcast strategies Mobile Ad Hoc Networks a hot issue in-depth study. The main content of this article and innovative results are as follows: 1. Study the saturation throughput and access delay IEEE802.11DCF enhanced multiple access protocol. Ad Hoc Networks MAC layer standard Because IEEE802.11DCF access mode has become saturated throughput and access delay of the MAC layer, so the research on the to study Ad Hoc network performance itself has a very practical significance. This paper presents a new analytical model. The model fully connected Ad Hoc Networks saturation throughput, access delay, as well as the best cache design. By using a one-dimensional Markov chain, approximate M/M/1/m model, a complete analysis of the the channel saturation through rate and access delay. The analysis of the results of approximate analysis model. , Through the design of optimal cache model can guarantee the QoS requirements of the system to provide the most appropriate size of the send buffer, effectively reduce the unnecessary waste of resources. 2. Different types of multi-service access delay adjustment strategy and traditional MACA multiple access protocol combining adaptive the MACA access protocol used in the Ad Hoc network traffic-FA-MACA. The agreement on the basis of the original MACA protocol, considering different priority business requirements, and can access delay the choice of control parameters dynamically based on the current traffic load of the network, thus improving the overall performance of the network. FA-MACA protocol not only radio channel in the presence of the \3. The concept of network node density as a to select the flooding relay node standard, a relative density of flooding the broadcasting algorithm-RDAB. The algorithm can cover more intensive node forwarding node principle, dynamically select forwarding node, according to the relative density of the nodes in the network real-time, each require the node to send a data packet executed independently RDAB algorithm, by as little as possible node, to reach the purpose of covering the whole network. RDAB algorithm can effectively reduce unnecessary retransmissions and improve the channel utilization, reduce the network to send data collisions. 4. Proposed a delay-sensitive adaptive routing algorithm-DSARP. The algorithm is a typical on-demand routing algorithm, which utilizes the route reply packet to the source node is fed back to the forward path and on the total number of queued packet and dynamically select the best path. Therefore DSARP maintain the shortest path constraints, increased level Xi'an University of Electronic Science and Technology Doctoral Dissertation: Mobile Ad Hoc Networks key technology research were the shortest delay \business) to provide reliable routing, while according to the traffic in the network node dynamically select the best path, reducing the average latency of the network is a new type of QoS guarantee routing protocols.

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