Browsing by Author "Shie-Yuan Wang"

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METHOD AND SYSTEM FOR SIMULATING A NETWORK TOPOLOGY USING A PHYSICAL MACHINE
(2018-10-25)
Shie-Yuan Wang
;
I-Yun Lee
A method and a system are disclosed for simulating a network topology using a physical machine. A physical switch with multiple ports is divided into multiple slice switches according to a network topology. Each slice switch simulates a node in a network. Every virtual port of the slice switch corresponds to a physical port. In simulation operation, a port-mapping table is applied to allow the virtual port to be one-to-one mapped to one physical port; a VLAN conversion table is used to manage the VLAN IDs for the virtual ports and to configure a VLAN tag applied to a simulated packet so that the packet can operate in the slice switch; an output port table is used to determine the output port of the simulated packet; and a pop-off VLAN tag table is used to allow the packet to restore to its original VLAN ID or non-VLAN tag state.
The effects of using roadside wireless repeaters on extending path lifetime in vehicle-formed mobile ad hoc networks on highways
(2006)
Shie-Yuan Wang
;
Chih-Liang Chou
;
資訊工程學系
;
Department of Computer Science
Intelligent Transportation Systems (ITS) is an important research topic. One goal of ITS is to exchange information among vehicles in a timely and efficient manner. In the ITS research community, inter-vehicle communications (IVC) is considered a way that could achieve this goal without infrastructure support. An information network built on top of vehicles using IVC is a type of mobile ad hoc networks (MANET). In the past, many unicast routing protocols for MANET have been proposed. In these protocols, when a routing path breaks, they either locally or globally repair it. Because the topology of an IVC network changes very rapidly on the roads, an established routing path in such a network breaks very frequently. This phenomenon hurts the performance of applications running on an IVC net work. In this paper, we investigate the effect of using roadside wireless repeaters on extending routing path lifetime in IVC networks on highways.
同步軌道通訊衛星IP網路系統規劃及IP網路通訊效能模擬研究
(2005)
王協源
;
Shie-Yuan Wang
;
國立交通大學資訊工程學系
商業性多媒體資訊服務的需求在現代人們的日常生活上有與日俱增的趨勢，特別是在一些聲音與影像的應用方面。而同步軌道通訊衛星由於具有廣域的通訊覆蓋區域以及與地表的相對位置變化不大的特性，在提供廣域通訊服務的應用上，便有相當的市場潛力。在普遍的應用上，衛星可以在高空上做大區域的影音廣播，或是提供跨國際的衛星電話服務。除此之外，衛星與已經蓬勃發展之不同型態的地面網路結合，也成為一種衛星網路架構的趨勢。在這種整合型的大網路裡，衛星所提供的無線傳輸通道，便扮演著其中的骨幹網路，提供長距離的訊息傳遞能力。然而，為了要與蓬勃發展的地面網路結合，衛星骨幹網路面臨了一些挑戰。由於地面網路要屬網際網路 ( Internet ) 為最大的網路型態，在網際網路上的應用與資源非常豐富，許多其他型態的網路在實際部署的時候，都有提供與網際網路結合的功能，這是為了使用來自網際網路的資訊資源所必須提供的整合能力，因此，衛星骨幹網路在設計時，也必須考慮與網際網路有相容與結合的能力。在網際網路上所使用的通訊協定 (Internet Protocol, IP)，便是我們在這個專案裡所要研究探討的部分。我們將利用網路模擬技術，評估網際網路通訊協定在衛星骨幹網路上的適用性，改良不適用於衛星骨幹網路的網際網路通訊協定以及網路系統設計，並進而提出適用於衛星骨幹網路的新網路通訊協定以及新的網路系統設計。