计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2015年
6期
1-5
,共5页
车载网络%网络编码%索引编码%消息广播方案%信源编码%编码增益
車載網絡%網絡編碼%索引編碼%消息廣播方案%信源編碼%編碼增益
차재망락%망락편마%색인편마%소식엄파방안%신원편마%편마증익
vehicular network%network coding%index coding%message broadcasting scheme%source coding%coding gain
在车载网络中,由于无线信道的脆弱性与车辆的高移动性,广播信息往往不能正确到达和接收。为解决该问题,提出一种基于索引编码的消息广播方案。该方案将索引编码应用于车载网络的信息广播中,可实现更高效的信息分发。给出一种基于分布式反馈机制以收集边信息,使用改进的图着色算法在边信息中寻找最大团,并运用最大团进行索引编码。仿真实验结果表明,该方案可以有效地减少最少传输次数,从而节约无线信道带宽,提高广播效率。
在車載網絡中,由于無線信道的脆弱性與車輛的高移動性,廣播信息往往不能正確到達和接收。為解決該問題,提齣一種基于索引編碼的消息廣播方案。該方案將索引編碼應用于車載網絡的信息廣播中,可實現更高效的信息分髮。給齣一種基于分佈式反饋機製以收集邊信息,使用改進的圖著色算法在邊信息中尋找最大糰,併運用最大糰進行索引編碼。倣真實驗結果錶明,該方案可以有效地減少最少傳輸次數,從而節約無線信道帶寬,提高廣播效率。
재차재망락중,유우무선신도적취약성여차량적고이동성,엄파신식왕왕불능정학도체화접수。위해결해문제,제출일충기우색인편마적소식엄파방안。해방안장색인편마응용우차재망락적신식엄파중,가실현경고효적신식분발。급출일충기우분포식반궤궤제이수집변신식,사용개진적도착색산법재변신식중심조최대단,병운용최대단진행색인편마。방진실험결과표명,해방안가이유효지감소최소전수차수,종이절약무선신도대관,제고엄파효솔。
In vehicular network, broadcasting messages are not often able to arrive and receive properly due to the vulnerability of wireless channels and high mobility of vehicles. To solve this problem, this paper proposes an index coding based message broadcasting scheme in purpose of improving the message transmission efficiency. Index coding is a variant of source coding scheme that exploits the side information at different receivers, and this paper focuses on implementing index coding technology in the message broadcasting of vehicular networks. It proposes a distributed feedback based side information collection mechanism and an improved graph coloring algorithm to find the maximum clique,and the indexing coding is done. Simulation experimental results show that the scheme can reduce the number of transmissions,thus save wireless channel bandwidths and improve broadcasting efficiency.