在此論文中，一個分散式的車載資通訊同儕網路系統(D-TP2P)被提出以提供有效率且可行的服務探索機制給行動使用者。當行動使用者在道路上旅行時， 他們可能會向服務供應者發送查詢以享用某些服務。我們設想在車上的行動使用者將會在不同區域之間移動，而每個區域都由個別的區域伺服器所管轄。而在某個區域內服務提供者們的相關資料則會被儲存於該區域的區域伺服器內，區域伺服器會負責處理來自該區域內行動使用者的服務探勘查詢。根據行動使用者的需求，有三種查詢的類型用來處理不同的情境：（1）以參考點為基準的查詢（2）持續性的查詢（3）以路徑為基礎的查詢。
本篇論文著重在發展出一個能在車載環境下給行動使用者使用的分散式的車載資通訊同儕網路系統。為了讓行動使用者與該使用者所屬的區域伺服器維持正確的連線狀態，一個區域伺服器決定機制被提出。行動使用者能夠正確地得知其所屬的區域伺服器，並且發送查詢。使得該區域伺服器能夠幫助行動使用者找到他們所需的服務提供者，無論其位於本地區域或遠端區域。當行動使用者於各個區域之間移動時，有時候查詢的結果等等相關資料必須從舊的區域伺服器被換手至新的區域伺服器，我們設計了區域伺服器換手機制以處理該問題。最後，在實驗的部分我們展示出了所提系統之效能。

In this paper, a distributed Telematics Peer-to-Peer (D-TP2P) networking system is proposed to provide an efficient and feasible service discovery mechanism for mobile users. When mobile users travel on the road, they may request for some services from service providers to meet their demands. mobile users in vehicles are assumed to go through a lot of regions, in which each region is associated with a region server. Related information of all service providers in a region is stored in its region server, and each region server is in charge of the service discovery requests from all vehicles located in its region. According to clients’ demands, there are three types of query scenarios, which are (1) reference point based query, (2) continual query and (3) route based query. This paper focuses on the issues of developing a distributed P2P Telematics service discovery networking system over the vehicular network environment for mobile users. In order to maintain correct connectivity between mobile users and their associated region servers, a region server decision mechanism is proposed. A mobile client can have awareness of his region server and correctly send a request to his associated region server. Then, the region server can help mobile users to find their requested service providers that are located locally or remotely. When mobile user moves through different regions, the related information of search results needs to handoff from original region server to new region server using proposed region server handoff mechanism. We also exhibit the performance merits of the proposed D-TP2P system in this paper.

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