We describe an architecture and Medium Access Control (MAC) protocol for WDM networks. Our system is based on a broadcast star architecture and uses an unslotted access protocol and a centralized scheduler to efficiently provide bandwidth-on-demand in WDM networks. To overcome the effects of propagation delays the scheduler measures the delays between the terminals and the hub and takes that de...

As the interest of the Internet multicasting increases, the huge portion of the future traffic in optical WDM networks is expected to be strongly related to multicast applications and thus the technology for grooming such traffics also becomes important. In this study, we investigate the problem of multicast traffic grooming in WDM optical mesh networks with sparse-splitting capability. The pro...

A reliability evaluation module is presented for study of WDM network reliability. In this module, WDM networks are assumed to consist of three kinds of network elements nodes, links and wavelength channelrelated elements. And a network performance index – network ‘function value’, was introduced here as a quantitative representation of working-state of WDM network under certain link capacity a...

Supporting WDM multicasting in an IP over WDM network poses interesting problems because some WDM switches may be incapable of switching an incoming signal to more than one output interface. An approach to WDM multicasting based on wavelength-routing, which constructs a multicast forest for each multicast session so that multicast-incapable WDM switches do not need to multicast, was proposed an...

One approach to accommodating IP traffic on a wavelength division multiplexing (WDM) network is to construct a logical topology, establishing a set of lightpaths between nodes. The lightpaths carry IP traffic but do not require any electronic packet processing at intermediate nodes, thereby reducing the load on those nodes. When the IP and WDM networks have independent routing functions, howeve...

There have been increasing interests in programmable optical add-drop multiplexers (OADM) and wavelength-selective switches in wavelength-division-multiplexed (WDM) networks. Conventional OADM has one input and one output channels, in addition to an add and a drop channels [l]. It is also called 1x1 OADM. Dynamic OADM with more than one output ports offers greater flexibility and functionality ...