Performance Analysis of Borrowing with Directional Carrier Locking Strategy in Cellular Radio Systems

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概要

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• A new carrier based dynamic channel assignment for FDMA/TDMA cellular systems, called borrowing with directional carrier locking strategy, is proposed in this paper. When a call arrives at a cell and finds all voice channels busy, a carrier which consists of multiple voice channels can be borrowed from its neighboring cells for carrying the new call if such borrowing will not violate the cochannel interference constraint. Two analytical models, cell group decoupling analysis and plantom cell analysis, are constructed for evaluating the performance of the proposed strategy. Using cell group decoupling(CGD)analysis, a cell is decoupled together with its neigbors from the rest of the network for finding its call blocking probability. Unlike conventional approaches, decoupling enables the analysis to be confined to a local/small problem size and thus efficient solution can be found. For a planar cellular system with threecell channel reuse pattern, using CGD analysis involves solving of seven-dimenional Markov chains. It becomes less efficient as the number of carriers assigned to each cell increases. To tackle this, we adopt the phantom cell analysis which can simplify the seven-dimensional Markov chain to two three-dimentional Markov chains. Using phantom cell analysis for finding the call blocking probability of a cell, two phantom cells are used to represent its six neighbors. Based on extensive numerical results, we show that the proposed strategy is very efficient in sharing resources among base stations. For low to medium traffic loads and small number of voice channels per carrier, we show that both analytical models provide accurate prediction on the system call blocking probability.

• 社団法人電子情報通信学会の論文
• 2000-10-25

著者

• Yeung K‐l

  The Author Is With The Department Of Electrical And Electronic Engineering The University Of Hong Ko

• Yum Tak-shing

  The Author Is With The Department Of Information Engineering The Chinese University Of Hong Kong

• YEUNG Kwan-Lawrence

  The author is with the Department of Electrical and Electronic Engineering, The University of Hong K

• Yeung Kwan-lawrence

  The Author Is With The Department Of Electrical And Electronic Engineering The University Of Hong Ko

関連論文

• Performance Analysis of Borrowing with Directional Carrier Locking Strategy in Cellular Radio Systems

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