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This paper investigates upstream wavelength scheduling in hybrid wavelength division multiplexing and time division multiplexing passive optical networks (WDM/TDM PONs), where the minimum resource allocation unit is a time slot on a wavelength. First, WDM/TDM PONs of three types are introduced with the consideration of network and service evolution: 1) Type-I WDM/TDM PONs, where each optical network...
This paper designs multiple channel scheduling algorithms for WDM PONs and OFDMA PONs to allocate upstream bandwidth resource to competing users. Simulation results demonstrate that the proposed algorithms obtain higher channel utilization.
MIPv6 as proposed in RFC3775 can be implemented in IPv6 as an extension header. Therefore, using standard robust header compression (ROHC) protocol, header compression can be applied for wireless environments with high bit error rate and long round trip delays. For wireless/mobile systems operating in a dynamic wireless environment, where the channel quality is highly variable, an adaptive compression...
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