QUADRO-stars: high performance optical WDM star networks

An original approach is proposed to controlling WDM (wavelength-division multiplexing) passive optical stars, termed queuing arrivals for delayed reception operation (QUADRO). In WDM stars the fundamental problem of receiver conflicts leads to severe performance degradation. In current solutions conflicts are prevented by scheduling transmissions or resolved by retransmissions. The proposed approach introduces the concept of resolving reception conflicts by incorporating a delay line receiver design. It thus brings the optical star networks a step closer to all-optical realization. In addition, it allows almost total utilization of the channels, as obtainable until now only by TDM