在無線多媒體網路上的多細胞頻寬調整技術

A Multi-Cell Bandwidth Adaptation Scheme in Multimedia Cellular Wireless Networks

10.7060/KNUJST.200512.0045

曾秀松(Show-Shiow Tzeng)

頻寬調整技術 ； 多媒體 ； 無線網路 ； wireless networks ； bandwidth adaptation ； multimedia

高雄師大學報：自然科學與科技類

19期（2005 / 12 / 01）

45 - 67

繁體中文

頻寬調整技術是一項調整行動使用者頻寬藉以提升系統效能的技術。前人文獻已提出一些頻寬調整技術；然而，這些技術只運作在無線系統中單一細胞的行動使用者。此篇論文提出了一個頻寬調整技術，此技術不但考慮了一個細胞中的行動使用者，也考慮了相鄰細胞中的行動使用者。換言之，此技術是一項多細胞頻寬調整技術。從電腦模擬結果，我們觀察到多細胞頻寬調整技術比起單一細胞頻寬調整技術有更佳的系統效能。

A bandwidth adaptation scheme is a scheme that selects a subset of mobile users and adjusts the bandwidth allocated to the mobile users in order to achieve a certain goal. A number of bandwidth adaptation schemes [16]-[21] perform a bandwidth adaptation operation on a single cell. This paper considers a bandwidth adaptation operation may involve multiple cells including a cell and its neighbor cells. Bandwidth adaptation involving multiple cells is not a straightforward generalization of that involving a single cell. The issues that need to be addressed include how to select a subset of mobile users in the overlap areas, how to select a subset of neighbor cells to accommodate the subset of mobile users, and how to adjust the bandwidths of the mobile users in these cells. This paper studies the problem of bandwidth adaptation involving multiple cells. The multi-cell bandwidth adaptation problem has been formulated as a zero-one integer linear programming problem. The multi-cell bandwidth adaptation scheme is obtained by solving the zero-one integer linear programming problem. We show that the multi-cell bandwidth adaptation scheme can effectively increase the revenue and reduce the blocking and the forced termination probability compared with a bandwidth adaptation scheme that involves only a single cell.

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