| 摘要: | 在這篇論文中，我們專注於博弈論和灰色模糊理論來解決常見的無線網路問題。首先是無線網路博弈論之路由方法，第二是使用灰色模糊控制在異質無線網路的有效資源分配方案。
在第一個問題中，我們知道某些無線網路具有自我組織和自我管理的特性。根據網路環境的不同，我們可以選擇不同的路由協議，例如車載Ad hoc網絡（VANET），無線網狀網路，亦或是移動式Ad hoc網絡（MANET）。然而我們已經設計了一種新的路由演算法，可將博弈論運用在高度獨立的無線Ad hoc網路內之路由。在網路中的每個節點上，根據實際的情況在選擇下一個節點時，考慮其合理的路由成本。因此，每一個網路節點的路由成本的發展，必須符合納許均衡和網路節點之定價機制。從模擬的結果得到證明，新算法對於大型的網路規模依然可有效的規範。此外，網路成本也算一個啟發式的方式，模擬結果證明所選擇的路徑與建議計劃所需要的成本，具有共享路徑的競爭力。
在第二個問題，異質無線網路是一個複雜的系統，如何透過聯合無線資源管理（JRRM），達到現實無線接入技術（RAT）。聯合無線資源管理（JRRM）這項工作，需採用一種新的灰色模糊控制機制。在整個架構中，JRRM技術可分為灰色模糊控制（GFC）與灰色模糊多屬性決策（GFMADM）兩種。這是一個功能強且新的JRRM架構，主要是在最大限度下減低對用戶的干擾、減少壅塞，以及降低的封包遺失率，並改善負載的平衡。所採用的策略是利用信號強度，路徑損耗和負載算法接納控制（AC），水平越區切換（HHO）和垂直切換（VHO）於異質無線方案中，其中包括GSM / EDGE無線電接入網路（GERAN），高速分組接入（HSPA），長期演進（LTE）無線電存取技術。亦可從模擬結果得到驗證，所建議的GFC / GFMADM演算法可以降低用戶干擾，提升系統的無線傳輸容量，減少壅塞和降低遺失率與提高負載平衡。
在這篇論文中，我們使用R&S CMW500建立無線基站模擬系統，尚有許多我們沒有考慮到的地方, 這將會是我們未來的研究的重點。
In this dissertation, we use both game and grey fuzzy theories to solve common wireless network issues. First we apply the game theory routing approach for wireless networks, then we apply the grey fuzzy control to improve resource allocation schemes in heterogeneous wireless networks.
In the first issue, we know some wireless networks are self-organized and self-managed. Depending on the network environment, we can choose a different routing protocol, such as a vehicular ad hoc network (VANET), a wireless mesh network, or a mobile ad hoc network (MANET). We have designed a new routing algorithm applying game theory to routing within the highly independent wireless ad hoc networks. Each node in the network, depending on the actual situation, selects its own reasonable cost next node. However, the development of each network node's routing cost must be in line with Nash equilibrium and the network nodes pricing mechanism. Our simulation results show that the new algorithm is efficient and scales well to large networks. In addition, the network cost is also considered in a heuristic manner and the simulation results illustrate that the required cost of the selected path in the proposed scheme is competitive with the shared path scheme.
In the second issue, a systematic approach to joint radio resource management (JRRM) over a complex heterogeneous network is to use several realistic radio access technologies (RATs). This work applies a novel grey fuzzy control process to joint radio resource management (JRRM). In this architecture, the JRRM techniques are divided between grey fuzzy control (GFC) and grey fuzzy multi-attribute decision making (GFMADM). These enhancements lead to a new JRRM architecture which seeks to minimize the multi-user interference, decrease blocking, lower dropping probabilities and improve load balancing. The policy uses the signal strength, path loss, and load algorithms for admission control (AC), horizontal handoff (HHO) and vertical handover (VHO) in a heterogeneous wireless scenario which includes GSM/EDGE radio access network (GERAN), high-speed packet access (HSPA) and long term evolution (LTE) RATs. Our simulation results show that the proposed GFC/GFMADM algorithm can decreases multi-user interference which results in increased system radio capacity, decreased blocking and dropping probabilities and enhanced load balancing.
The integration of Heterogeneous Wireless Networks and ad hoc wireless networks access network is recognized to be the trend of next generation network. In this dissertation, we use the R&S CMW500 simulator to simulate a wireless base station simulation system. We did not consider a number of cases which may lead to future research topics. |
