在移動隨意網路下一種基於核心點的有效率網狀群播路由協定

Abstract

隨著網路的快速發展，除了有線網路外，無線網路也被快速的設置於每個城市。在此之前，隨意無線網路應用於mesh-based，已被證實比tree-based更能帶來好的效能，但mesh-based中大多會出現過多控制封包的問題，於大型隨意無線網路下此現象更為嚴重。本論文將基於有效選擇核心節點(core node)的技巧在mesh-based multicast routing環境下，提出一種改良的multicast routing路由協定，稱為ECMRP (Efficient Mesh-based Core Multicast Routing Protocol)。ECMRP是一種應用於無線基礎架構下基於核心點的無線網路環境群播路由協定，利用核心點的幫忙，解決ODMRP環境中所會出現的control overhead問題，使整體網路拓撲中的控制封包大大的減少。最後，我們使用GloMoSim模擬工具，從模擬結果可以證明由於ECMRP能有效減少控制封包的數量，頻道碰撞發生的情形不會因為有過多的控制封包而大幅增加，因而得以提高封包傳送效率、提供更好的端對端傳輸延遲，同時，也更適合於在大型網路topology環境裏運作。The rapid development of Internet extends the applications of wireless network in our daily life. The mesh-based mobile ad-hoc network has been verified to be more efficient than the tree-based one. But the mesh-based ad-hoc network has a big challenge that many control packets would be generated in the large-scale wireless network. In this paper, we propose a novel core foundation scheme for mesh-based multicast routing protocol in ad-hoc networks, which is called ECMRP (Efficient Mesh-based Core Multicast Routing Protocol). ECMRP uses the help of core nodes to reduce the control packets overhead which is serious in the ODMRP environment. Finally, the simulation tool GloMoSim is used to simulate our proposed scheme. The results of simulation have shown that the proposed novel protocol effectively reduces the number of control packets, provides the better end-to-end delay, enhances the protocol efficiency, and is suitable for a large-scale ad-hoc network environment.