Mobility-oriented guard channel assignment for personal communication systems

Personal communications systems (PCS) represent a rapidly growing and increasingly important segment of the telecommunication industry. We investigate the issue of mobility-oriented guard channel assignment in a mixed traffic load environment. According to different generation sources, calls are first distinguished between handoff and original calls. The original calls are further divided into four classes based on their different mobility and load characteristics, i.e., high load/high mobility; low load/high mobility; high load/low mobility; low load/low mobility. In order to reduce the forced termination of handoff calls, the priority is given to high mobility calls over low mobility calls, and with the same mobility level, high load calls are assumed to have the priority over low load calls. We compare the forced termination and uncompleted call probabilities when assigning different sets of guard channels to the handoff and prioritized original calls. The analytical model presented can effectively cover a wide range of mobility and load levels.