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.
Asian Journal of Health and Information Sciences,2(1-4):49-65.