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A five-layer grating structure is designed to generate polarization-independent filter in the telecom band. It is demonstrated theoretically that in the five-layer grating structure, by adjusting the thickness of the interlayer sandwiched between two dielectric layers with high permittivity, the resonance wavelengths of transverse magnetic (TM)- and transverse electric (TE)-polarized light can locate...
Call admission control (CAC) plays a critical role in the performance of the IEEE 802.16 mesh networks. The IEEE 802.16 standard does not specify any CAC mechanisms. In this paper, based on bandwidth estimation, we propose a call admission control scheme in IEEE 802.16 centralized scheduling mesh mode. The proposed scheme does the admission control function by using the characteristic defined in the...
In this paper, we propose a QoS-aware resource allocation scheme for IEEE 802.16d fixed WiMAX system operating in TDD mode. It focuses on the performance enhancement of the resource allocation. The proposed scheduling algorithm flexibly adjusts bandwidth among the different traffics to try to get the best efficiency while considering the fairness among the different traffics in a way. The efficiency...
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