提升使用端效能之異質無線技術整合研究

Abstract

在整合異質無線技術上所需要考慮包括無線協定中各層的不同技術 問題。在路徑選擇協定上也是都要考慮各種不同無線技術的能力跟功能，而目前最關鍵的就是針對網路層設計。 在此份論文中，我們考慮網路下載的流量，設計一個協力合作架構包 括各種異質無線平台，多重模式(多重無線介面)的行動裝置和固定的裝置，這些裝置都有能力支援多重通道，並且實現提升使用端更好的下載使用效能。在此架構上提出一個協力合作的路徑選擇協定，此協定利用線性方法去計算出最佳路徑。所以我們最主要的目地就是在此架構上利用協力合作的路徑選擇方法提升使用端的下載速度。而我們的模擬實驗也證明此方法在協力合作架構上可以得到有效的效能提升。

Integrating heterogeneous wireless technologies involves various technological challenges at all layers of the protocol stack. Designing at thenetworks layer is perhaps the most critical, while the most challenging for different capabilities and functionalities of various wireless access models should be all taken into account in a unified routing process. In this thesis, considering downloading traffic from the Internet, we propose a synergized framework (SF), consisting of heterogeneous wireless platforms, multi-mode (multi-interface) mobile and fixed wireless hosts capable of operating over multiple orthogonal (non-overlapping) radio channels, to realize better downloading experiences for users via cooperation between different wireless technologies. An SNG routing protocol is devised to enable the proposed framework. Given perceived network nformation, SNG performs computations based on linear formulations, and obtains an optimized route for packet delivery. Our main objective is to improve effective user downlink throughput via the cooperative (synergized) communication model and its corresponding SNG routing mechanism. Simulation results demonstrate the benefits brought by the unified rchitecture and corroborate the efficacy of the proposed routing technique.