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Research and Simulation on MAC Protocols of Ultra-short Wave Networks

Author: LiuJianFei
Tutor: HuangXuHui
School: National University of Defense Science and Technology
Course: Computer Science and Technology
Keywords: Ultrashort wave Medium Access Control Request Incidentally Channel model Co-simulation
CLC: TN925
Type: Master's thesis
Year: 2011
Downloads: 27
Quote: 0
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Abstract


Ultrashort wave communication as an important way of wireless data communications, the communication quality, the device is simple, convenient, and easy networking Emergency Recovery, has been widely used in both military and civilian. Ultrashort wave communication in the military in the field of wireless communications, has been dominated by an extremely important position, is one of the important means of tactical command liaison. With the constant evolution of the form of war, and high-tech equipment continue to emerge, in the form of war and the scale of war are constantly changing, which makes the bandwidth resources to become one of the bottlenecks constraining ultrashort wave communication. Therefore, the ultrashort wave communication network MAC (Media Access Control Media Access Control) layer study has important practical significance. The ultrashort wave divided into MAC protocol based allocation, based on the competition as well as the mixed class protocol. CBPMAC / TFC is a combination of FDMA, TDMA and CSMA three mechanisms mixed class of MAC protocols, applies to the sudden business cycle business coexist network environment. Scheduling policy for CBPMAC / TFC agreement within the same cluster throughput low energy consumption and higher deficiencies, this paper proposes a centralized TDMA protocol based on the request and incidentally, in the OMNeT platform protocol simulation. The main work of the paper are as follows: 1, a new FM communication network MAC protocol RP-TDMA (Request and piggyback ack TDMA). RP-TDMA protocol requests and to piggyback two ways to get the time slot, which can effectively reduce competition between nodes, and improve system performance. 2, on the performance of the RP-TDMA protocol analysis. RP-TDMA protocol performance model constructed on the basis of the model G Bianchi, analyzed the performance of the protocol, the throughput of the protocol, and the energy consumption calculation formula is given. 3, build a the ultrashort wave physical layer channel simulation model. MATLAB / SIMULINK toolbox of ultrashort wave physical layer channel simulation model, and comparative analysis of simulation results under different interference channel model. OMNeT platform RP-TDMA protocol model and protocol model and channel model simulation. Simulation results show that: 1) relative to CBPMAC / TFC agreement, RP-TDMA protocol to improve throughput and reduce energy consumption; 2) theoretical and experimental values ??of the RP-TDMA protocol agreement, to verify the correctness of the protocol performance model ; 3) a simulation result of the underlying physical channel has a non-negligible impact performance of a simulation result of the upper-layer protocol, the physical layer channel simulation accuracy affect the accuracy of simulation of the performance of the upper layer protocol.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Radio relay communications,microwave communications
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