Channel Partition with Repacking for GSM Using Half / Full Rates and Dual mode Mobile Stations

• Main Authors: Zong-Sheng Lin, 林宗陞
• Other Authors: Chien-Chuan Ko Ph. D.
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/43364734023929048351

碩士 === 國立嘉義大學 === 資訊工程研究所 === 91 === We propose Channel Partition with Repacking Scheme (CPR) for the users with full-rate calls, half-rate calls, and dual-mode mobile stations in GSM system. The scheme partitions the time slots of GSM radio frame into two parts, one is full-slot partition that provides full-time slots for the full-rate calls, another is half-slot partition that provides half-time slots for the half-rate calls. If the time slots of the full-slot partition are not available, the system allocates the full-time slots of the half-slot partition to the full-rate calls request. If the time slots of the half-slot partition are not available, the system allocates the half-time slots of the full-slot partition to the half-rate calls request. Furthermore, consider the requests of the dual-mode mobile stations, we propose CPR with Least Repacking scheme, CPR with Maximum QoS scheme, CPR with QoS Partition scheme to improve the system performance. We evaluate the system performance by computer simulations. In the simulation, we show that our schemes can improve the usage of the time slots, and reduce the probabilities of new call blocking and handoff call failure.