透過您的圖書館登入
IP:3.14.141.228
  • 學位論文

在跨層式設計、感知與協力無線網路的行動管理

Mobility Management for Cross-Layer Design, Cognitive and Cooperative (C3)Wireless Networks

指導教授 : 莊東穎
共同指導教授 : 陳裕賢
若您是本文的作者,可授權文章由華藝線上圖書館中協助推廣。

摘要


現今無線網路的管理是採用固定式頻譜分配策略。在有限的可利用頻譜和使用率不佳的頻譜中,需要新的通信標準採投機的方式在現存的無線頻譜中找尋可利用的頻譜。這種新的網路標準被稱為下一世代網路 (xG)、動態頻譜存取 (DSA)及感知無線網路。xG網路並沒有頻譜使用權,因此頻譜的存取是需要一種投機的方法來使用頻譜。而xG網路可以建置在有網路基礎建設及隨見即連的網路上。xG的使用者並沒有頻譜使用權。因此需加上額外的功能使得頻譜能分享出去。本論文中, 我們提出在跨層式設計、感知與協力 (C3)機制。提出"得到最佳的可利用頻帶" 概念,感知無線電為了取得最佳的可用頻譜必須隨時考慮頻譜偵測、頻譜配置和頻譜存取,最後為頻譜的換手。實驗結果顯示,我們提出的方法可以提高頻譜的使用率改善現有機置。

並列摘要


Today’s wireless networks are managed by a fixed spectrum allocation policy. The limited available spectrum and the inefficiency in the spectrum usage need a new communication criterion to exploit the existing wireless spectrum opportunistically. This new networking criterion is referred to as Next Generation (xG) Networks as well as Dynamic Spectrum Access (DSA) and cognitive radio networks. The xG network does not have license to operate in a desired band. Hence, the spectrum access is allowed only in an opportunistic method.So xG networks can be deployed both as an infrastructure network and an ad hoc network. The xG user has no spectrum license. Hence, additional functionalities are required to share the licensed spectrum band. In this thesis, we present a Mobility Management for Cross-Layer Design, Cognitive and Cooperative (C3) scheme. To realize the ”Get the Best Available Channel” concept, an cognitive radio has to capture the best available spectrum called as spectrum sensing at any moment, then does spectrum allocation and spectrum access, finally spectrum handoff. Experimental results show that the we present protocol outperforms existing solutions in terms of Spectrum allocate and Spectrum utility ratio.

參考文獻


[2] 3GPP. ”Physical channels and mapping of transport channels onto physical channels (TDD)”.
[3] A. Mishra; D.P. Agrawal. ”Design of a Medium Access Control Protocol for Dynamic Spectrum
[4] C. Cordeiro; K. Challapali. ”C-MAC A Cognitive MAC Protocol for Multi-Channel Wireless
Networks”. IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN),
[5] Q. Zhao; L. Tong; A. Swami; Y. Chen. ”Decentralized cognitive MAC for opportunistic spectrum

延伸閱讀