【摘要】：隨著以LTE和LTE-Advanced為主的4G系統(tǒng)的發(fā)展,以固定節(jié)點形成的網(wǎng)絡結構已經(jīng)無法有效地滿足迅速增長的業(yè)務需求。形狀、位置可動態(tài)變化的無定形小區(qū),不僅能夠對抗由網(wǎng)絡自身的特性所引起的覆蓋空洞,還可以增強覆蓋、降低成本�；谶@些,我們完全可以有理由相信,對無定形小區(qū)系統(tǒng)的研究將具有極大的理論價值和更廣闊的應用前景。本文主要研究了無定形小區(qū)系統(tǒng)中的動態(tài)資源管理。首先,介紹了無定形小區(qū)系統(tǒng)的相關知識,主要包括定義、特點、場景等,并對mobile relay的結構進行了介紹,然后闡述了與mobile relay結構相對應的場景和切換過程。針對無定形小區(qū)系統(tǒng),基于現(xiàn)有的mobile relay切換機制,本文研究了一種基于雙天線架構的優(yōu)化切換機制,以實現(xiàn)在高速鐵路環(huán)境中的群切換,同時保證在切換過程中的為用戶提供不間斷通信服務,進而達到減少信令損耗、保證通信質(zhì)量的目的。最后,針對無定形小區(qū)的移動性特點,基于馬爾可夫決策過程,研究了考慮用戶移動性的動態(tài)中繼選擇方法,使得中繼的選擇更能符合用戶移動性和綠色通信的需求。本文結合現(xiàn)有的相關知識,針對無定形小區(qū)系統(tǒng)中的動態(tài)特性進行了相關研究,希望能為無定形小區(qū)的實際應用提供便利。
[Abstract]:With the development of 4G systems with LTE and LTE-Advanced, the network structure formed by fixed nodes can not meet the rapidly increasing service demand. The amorphous cell whose shape and position can change dynamically can not only resist the coverage void caused by the characteristics of the network itself but also enhance the coverage and reduce the cost. Based on these, we can reasonably believe that the study of amorphous cell system will have great theoretical value and wider application prospect. This paper mainly studies the dynamic resource management in the amorphous cell system. Firstly, the knowledge of amorphous cell system is introduced, including definition, characteristics, scene and so on. The structure of mobile relay is introduced, and then the scene and switching process corresponding to mobile relay structure are described. For the amorphous cell system, based on the existing mobile relay handoff mechanism, this paper studies an optimized handoff mechanism based on dual-antenna architecture to realize group handover in high-speed railway environment. At the same time, it can provide continuous communication service to users in the process of switching, so as to reduce the loss of signaling and ensure the quality of communication. Finally, according to the mobility characteristics of amorphous cell, based on Markov decision process, the dynamic relay selection method considering user mobility is studied, which makes the relay selection meet the needs of user mobility and green communication. Based on the existing knowledge, this paper studies the dynamic characteristics of amorphous cell system, hoping to provide convenience for the practical application of amorphous cell.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5

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