發(fā)布時間：2018-01-04 23:20

  本文關(guān)鍵詞：基于車載異構(gòu)網(wǎng)絡(luò)的接入選擇策略研究　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： VHN 接入選擇 定價策略 合作博弈理論

【摘要】：隨著車載網(wǎng)絡(luò)的迅速普及以及配備無線通信技術(shù)的車輛數(shù)據(jù)的增加,道路中的數(shù)據(jù)交換變得越來越值得關(guān)注。車載異構(gòu)網(wǎng)絡(luò)(VHN,Vehicular Heterogeneous Network)作為無線車載網(wǎng)絡(luò)中特殊的一種,既具有一般車載網(wǎng)絡(luò)的特點,同時也具有一般無線異構(gòu)網(wǎng)絡(luò)的特征。因此,在車載異構(gòu)網(wǎng)絡(luò)中,節(jié)點選擇接入網(wǎng)絡(luò)的策略十分重要�，F(xiàn)有的車載異構(gòu)網(wǎng)絡(luò)節(jié)點接入網(wǎng)絡(luò)的方式,通常都是采用自主下載的方式,通過對周圍網(wǎng)絡(luò)的探測和評估,選擇最符合自己需求的網(wǎng)絡(luò),然后通過切換技術(shù)接入到所選定的網(wǎng)絡(luò)進行數(shù)據(jù)下載。但在實際應(yīng)用中,同一段道路中的車輛往往可以通過合作的方式共同下載所需的應(yīng)用,以達到降低接入代價的目標(biāo)。本文針對車載異構(gòu)網(wǎng)絡(luò)中節(jié)點通過合作方式進行數(shù)據(jù)下載的情況,提出了兩種接入選擇策略:獨付式接入選擇策略和分?jǐn)偸浇尤脒x擇策略。獨付式接入選擇策略主要針對有且僅有需求節(jié)點有數(shù)據(jù)下載的需求的場景,該策略包括了基于合作博弈理論中夏普利公式的定價策略和選擇接入節(jié)點的接入節(jié)點確認(rèn)機制。而分?jǐn)偸浇尤脒x擇策略則是針對需求節(jié)點的周圍節(jié)點同樣有該數(shù)據(jù)下載的需求的場景,該策略中的成交價格是根據(jù)各個車輛自主接入時的代價占總代價的比例來進行定價的,而接入節(jié)點確認(rèn)機制與獨付式接入選擇策略相似,綜合考慮成交價格和性價比這兩種參數(shù),選擇出最符合自己需求的節(jié)點與之合作,完成數(shù)據(jù)的下載,從而以較低的價格獲得有質(zhì)量的服務(wù)。本研究通過MATLAB仿真工具,首先分別比較了獨付式接入選擇策略和分?jǐn)偸浇尤脒x擇策略中價格參數(shù)和性價比參數(shù)的比例調(diào)整對接入節(jié)點確認(rèn)機制的性能的影響情況,然后將兩種接入選擇策略分別與現(xiàn)有的垂直切換策略在成交價格和性價比方面進行了比較,最后考慮當(dāng)需求節(jié)點的周圍節(jié)點同時存在對應(yīng)用感興趣和不感興趣的節(jié)點,即獨付式接入選擇策略和分?jǐn)偸浇尤脒x擇策略同時被使用的情況,比較不感興趣的節(jié)點比例的變化對成交價格和性價比的影響。實驗結(jié)果表明,車載異構(gòu)網(wǎng)絡(luò)獨付式接入選擇策略和分?jǐn)偸浇尤脒x擇策略都能夠在保證服務(wù)質(zhì)量的同時降低接入成本,同時,為了盡可能的降低成交價格和提高服務(wù)質(zhì)量,需求節(jié)點會盡可能的選擇采用分?jǐn)偸浇尤脒x擇策略的周圍節(jié)點合作下載數(shù)據(jù)。
[Abstract]:With the rapid popularization of vehicle network and increase vehicle data equipped with wireless communication technology, road data exchange becomes more and more worthy of attention. On heterogeneous networks (VHN, Vehicular Heterogeneous Network) is a kind of special wireless vehicular networks, both the characteristics of general vehicle network, but also has the general characteristics of wireless heterogeneous in vehicle network. Therefore, heterogeneous network, access network node selection strategy is very important. The existing vehicle heterogeneous network nodes, usually using independent download mode, through the detection and assessment of the surrounding network, choose the most in line with the needs of their own network, and then through the switch to access technology the selected network to download the data. But in practical application, the same section of the road in the vehicle can often through the way of cooperation and common under the load required The application, in order to reduce the access cost target. According to the vehicle nodes in heterogeneous network to download data by way of cooperation, put forward two kinds of access selection strategy: single type access selection strategy and allocation type access selection strategy. The type of access selection strategy for and only needs node demand data download the scene, the strategy includes the access node in the cooperative game theory formula of Shapley pricing strategy and choice of access node confirmation mechanism based on sharing type. Access selection strategy is for the nodes around the node also needs the demand for data download of the scene, the price strategy is based on each vehicle autonomous access when the cost of the total cost of the proportion of pricing, and the access node and the payment confirmation mechanism access selection strategy is similar to that of considering the transaction The price and cost of these two parameters, choose the most in line with the needs of their cooperation with the node, data download, so as to obtain quality service at low prices. This research by MATLAB simulation tools, first compare the single type of access selection strategy and pricing strategy in the selection of parameters and the parameters of price points the adjustment of the ratio of share access to the access node confirm the mechanism of the influence of performance, and then two kinds of access selection strategy and Vertical Handoff Strategy Existing in the price and the price are compared, finally consider when demand nodes around the nodes exist at the same time node for the application is interested in and are not interested in, i.e. only pay access selection strategy and allocation type access selection strategy is used at the same time, changes in node proportion are not interested in the comparison of the price and the price. The experimental results show that the single type vehicle heterogeneous network access selection strategy and allocation type access selection strategy can reduce the cost of access, in ensuring the quality of service at the same time at the same time, in order to reduce prices and improve the quality of service, the node needs to choose will make possible the use of shared access selection strategy around node cooperation download the data.

【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.5
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本文編號：1380556