A Reassignment Code Allocation Scheme for Multirate Services on OVSF CDMA Cellular Networks

摘要：

In downlink of OVSF CDMA system, such as WCDMA, Orthogonal Variable spreading factor (OVSF) codes are used as channelization codes to distinguish different physical channels in order to support variable bit rate services. So the allocation scheme of OVSF codes affects the utilization of downlink bandwidth and the performance of the whole network. In this paper, we propose a reassignment code allocation scheme which can increase the utilization of downlink bandwidth and decrease the code fragments on the OVSF code tree. The simulation results show that this scheme can reduce the impact of reassignment process to system efficiently and maintain low call blocking ratio at the same time.

关键词： OVSF WCDMA code allocation

作者: Shuming Guo Jianhua Peng Jiangxing Wu

作者单位: Institute of Information Engineering, the PLA University of Information Engineering, Zhengzhou 450002, China

会议类型: 国际会议

会议名称: 第三届IEEE无线通讯、网络技术暨移动计算国际会议

会议地点: 上海

会议语种:英文

在线出版日期: 2007-09-21（万方平台首次上网日期，不代表论文的发表时间）