Three methods of distributed reservation named FQRP (Forward Queue Reservation Protocol), FRP-λ (Single
Wavelength Forward Reservation Protocol) and Extension of FRP in optical network are proposed in this paper. The
three methods make some improvements on the traditional FRP (Forward Reservation Protocol) and BRP (Backward
Reservation Protocol). They are described, analyzed and simulated in detail in this paper. The simulation results show
that they do have advantages over the traditional two methods. Each has its own advantage.
Two methods of reservation namely ANIR (all nodes-initiated reservation) and MSR (multi-states reservation) are proposed and compared with SIR (source-initiated reservation) and DIR (destination-initiated reservation). The four methods of reservation are simulated in NSFNET and ARPA topologies. Numeric results show that the blocking probability of ANIR is lower than SIR, but the number of packages which it generates is larger, and the blocking probability of MSR is lower than DIR and SIR under light load.
The complexity of optical networks has been researched and some complexity laws are described here. Then
some metrics from complex networks, such as mean path length, node's degree distribution and node's
clustering coefficient have been introduced into optical networks. The invulnerability in complex optical
networks is mainly researched in this paper.