| Summary: | 碩士 === 國立東華大學 === 電機工程研究所 === 87 === As the cover range of the radio cells is gradually smaller than before, the procedures for mobile terminal 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 continuous reconnections. In this paper, based on WDM-based PCN (Personal Communication Network) and SCM-WDM PCN two network architectures, the channel allocation algorithm is used to keep the offset conflict probability as low as possible. Simulation results show that the wavelength-offset assignment scheme performs better than the other schemes in offset conflict probability under moderate roaming rate in the WDM-based PCN architecture. And in the SCM-WDM PCN architecture, the proposed wavelength-frequency-offset assignment algorithm performs better than the others under different roaming rate (10%~70%).
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