A hybrid MAC protocol for a metro WDM network using multiple free spectral ranges of an arrayed-waveguide grating

In thispiszF werep#7 on a novel quality-of-servicesupity-of reservation-based medium access control (MAC) pMAC)zG for a reliable, scalable, and cost-e#ective switchless wavelength divisionmultipzTfi)) network. The network is comp#%)zI pomp# and is based on an arrayed-waveguide grating (AWG). Each node at the networkptworkzG is equip#F with one single fast tunable transceiver for data and one low-cost broadband light source which isspfiF#TzIx sliced for broadcasting control information. Direct sequencespuen spuence techniques are used to enable simultaneous transmission of data and control. All wavelengths are used for data transmission and signaling is done in-band. Each node has global knowledge and schedules variable-size dataptazx7 on a deterministic first-come-first-served and first-fit basis guaranteeing fairness and compG%xzI avoiding channel and receiver collisions. ThepezGx#x pezGx#x pezGx# bothpthz7 and circuit switching andsupxxTfi multicasting. The network e#ciency is significantly increased by spfi#7fizI reusing wavelengths and exp%#x%zI multipx freespezxF# ranges (FSRs) of the AWG. The analysis accounts for pzfiT7#zI#% delay andpdz#Gfi# time. Results show that using three FSRs instead of one significantly decreases the mean delay andimp#fiG# the meanthroughpz byup to 88%, resulting in a normalized meanthroughpz of ap)GfizI##xTF 78%. The analytical results are verified by simulation