【摘要】：近年來(lái),隨著手持設(shè)備(如智能手機(jī)、可穿戴設(shè)備)的迅速發(fā)展及短距離通信能力的提升,手持DTN網(wǎng)絡(luò)應(yīng)運(yùn)而生。手持DTN網(wǎng)絡(luò),又被稱(chēng)為口袋交換網(wǎng)絡(luò)PSN(Pocket SwitchedNetwork,PSN),是一種在手持設(shè)備上實(shí)現(xiàn)DTN協(xié)議組成的自組織網(wǎng)絡(luò),具有結(jié)構(gòu)簡(jiǎn)單、組網(wǎng)迅速、使用方便、抗毀性強(qiáng)、無(wú)需基礎(chǔ)設(shè)施也可隨機(jī)組網(wǎng)通訊等優(yōu)勢(shì),已經(jīng)成為目前DTN網(wǎng)絡(luò)的研究熱點(diǎn)。手持設(shè)備采用某種固定的路由算法完成消息傳輸,具有一定的局限性;同時(shí),會(huì)帶來(lái)資源消耗大、丟包率高,以及無(wú)法為用戶提供多樣化通信服務(wù)的問(wèn)題。因此,本文設(shè)計(jì)并實(shí)現(xiàn)了一個(gè)面向手持設(shè)備的DTN路由推薦系統(tǒng)。主要工作如下:首先,針對(duì)手持設(shè)備僅采用單一固定DTN路由算法進(jìn)行通信,導(dǎo)致資源消耗較大、丟包率較高以及多樣化通信需求難以滿足等問(wèn)題,本文構(gòu)建了一個(gè)面向手持設(shè)備的DTN路由推薦模型,通過(guò)在底層通信模塊中擴(kuò)展多種路由算法來(lái)滿足用戶的多樣化通信需求,同時(shí)利用推薦模塊向底層通信模塊推薦最佳路由算法。底層通信模塊調(diào)用推薦模塊推薦的路由算法完成消息的傳輸,從而達(dá)到減少資源消耗、降低丟包率、滿足用戶多樣化需求的目的。其次,為了給底層通信模塊選擇出最佳路由算法,綜合考慮了用戶需求、設(shè)備資源情況及設(shè)備密度三個(gè)因素,提出一種結(jié)合局部資源的推薦方法。推薦方法通過(guò)用戶需求計(jì)算手持設(shè)備中每個(gè)路由算法的性能綜合評(píng)分,通過(guò)消息格式、設(shè)備資源、設(shè)備密度獲得單副本和多副本路由算法概率。最終,依據(jù)性能綜合評(píng)分和選擇概率篩選出滿足用戶需求、消耗設(shè)備資源較少的路由算法,并將所得到的路由算法傳遞給底層通信模塊執(zhí)行。最后,本文實(shí)現(xiàn)了面向手持設(shè)備的DTN路由推薦系統(tǒng),該系統(tǒng)通過(guò)調(diào)用的多種路由算法完成消息傳輸來(lái)驗(yàn)證路由推薦模型的有效性。該系統(tǒng)通過(guò)設(shè)置設(shè)備密度、消息大小、消息格式、設(shè)備資源等實(shí)驗(yàn)參數(shù),驗(yàn)證推薦方法的有效性。
[Abstract]:In recent years, with the rapid development of handheld devices (such as smart phones, wearable devices) and the improvement of short distance communication ability, handheld DTN networks emerge as the times require. Handheld DTN network, also known as pocket switching network (PSN (Pocket SwitchedNetwork,PSN), is a kind of self-organizing network which realizes DTN protocol on handheld devices. It has the advantages of simple structure, rapid networking, convenient use and strong survivability. The advantage of random network communication without infrastructure has become the research hotspot of DTN network. Handheld devices use some fixed routing algorithm to complete message transmission, which has some limitations. At the same time, it will bring about the problems of large resource consumption, high packet loss rate and the inability to provide diversified communication services for users. Therefore, this paper designs and implements a DTN routing recommendation system for handheld devices. The main work is as follows: firstly, only a single fixed DTN routing algorithm is used for handheld devices, which leads to the problems of large resource consumption, high packet loss rate and the difficulty of meeting the diverse communication requirements. In this paper, we construct a DTN routing recommendation model for handheld devices. We extend a variety of routing algorithms in the underlying communication module to meet the diverse communication needs of users. At the same time, the recommendation module is used to recommend the best routing algorithm to the underlying communication module. The underlying communication module calls the routing algorithm recommended by the recommendation module to complete the transmission of messages, thus reducing the consumption of resources, reducing packet loss rate, and meeting the diverse needs of users. Secondly, in order to select the best routing algorithm for the underlying communication module, considering three factors: user demand, equipment resource situation and device density, a recommendation method combining local resources is proposed. The recommended method calculates the performance score of each routing algorithm in handheld devices through user requirements and obtains the probability of single-copy and multi-replica routing algorithms through message format device resource and device density. Finally, according to the comprehensive performance score and selection probability, the routing algorithm which meets the user's needs and consumes less equipment resources is selected, and the routing algorithm is transferred to the underlying communication module for execution. Finally, this paper implements the DTN routing recommendation system for handheld devices. The system uses a variety of routing algorithms to complete the message transmission to verify the validity of the routing recommendation model. The system verifies the effectiveness of the proposed method by setting the experimental parameters such as device density message size message format and device resource.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：TP391.3

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本文編號(hào)：2378796