Coarse WDM/CDM/TDM concept for optical packet transmission in metropolitanand access networks supporting 400 channels at 2.5 Gb/s peak rate

To improve the networking flexibility in the metropolitan and access area, the granularity in the optical domain has to be increased above that in the core network requiring more channels at lower bit rates. Pure dense wavele ngth division multiplexing (DWDM) as it is applied in the core does not see m to meet this requirement at affordable cost. We propose and analyze a net work based on hybrid optical multiplexing techniques including wavelength, code, and time division multiplexing. Applied to optical packet transmisssi on this approach enables several 100 all-optical channels between end users and headend with average bit rates up to 100 Mb/s per channel while keepin g the installation and maintenance cost at a minimum.