A channel assignment scheme for SCM/WDM-based personal communication network

As the cover range for the radio cells becomes gradually smaller than before, the procedures for mobile terminals call setup and control become complicated due to the high handoff frequency. The broadcast nature of WDM star couplers makes the handoff scheme easier and reduces the number of reconnections. In this study, we proposed a channel allocation algorithm, called pre-empted assigned offset (PAO) scheme, for the WDMand SCM/WDM-based PCN architectures. The main idea is to keep the offset conflict probability lower. The simulation results show that the proposed scheme outperforms those previously introduced schemes. Especially in offset conflict probability under a moderate roaming rate for WDM and even under heavy roaming situations for SCM/WDM. Copyright  2001 John Wiley & Sons, Ltd.