Utilization optimization for OVSF multi-code assignment in WCDMA networks

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題名: Utilization optimization for OVSF multi-code assignment in WCDMA networks

作者: J.C. Chen;H.F. Ng;H.L. Lin

關鍵詞: mobile networks;WCDMA;OVSF code;multi-code 日期: 2007

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上傳時間: 2010-04-15T05:41:41Z

摘要: Radio resources, such as WCDMA OVSF codes, are scarce and valuable in cellular mobile

networks, necessitating the need for their efficient use by network operators. Many OVSF

code-assignment schemes for WCDMA networks have been widely studied. This paper proposes an

evaluation model to accurately predict OVSF multi-code assignment performance in WCDMA

networks. Theoretical and simulation results indicate that the proposed analytical model works to

evaluate the multi-code assignment performance. Two important performance measures, call blocking

probability (CBP) and bandwidth utilization (BU), are then adopted to solve a utilization optimization

problem for WCDMA network planning and re-planning. The optimization problem applies a given

traffic statistic and a specified maximum CBP constraint to maximize the BU by discovering the

optimal number of basic-rate codes in a Node-B. Consequently, the operators will be able to use the

results to deploy their codes flexibly, and to improve their profitability.

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