Research Of Signaling And Resources Reservation Technology In Multi-Domain Optical Network

The emergence of intelligent optical network based on automatically switched optical network (ASON), conforms to the growing demand of IP data traffic, through the dynamic optical network bandwidth allocation and scheduling, improves the resource utilization of the whole network, reduces the optical and wavelength Number of convenient and chieves the network optimization flexibly.The key to the implementation of intelligent optical network is the realization of the network control plane signaling, routing, resource management of optical link functions. The single domain optical networks through extension of the application of the common multi-protocol label switching (GMPLS) reach the control the basic requirements of the control level, particularly RSVP-TE signaling protocols become the main way to achieve the functionality. Since the constant expansion of optical networks, next-generation intelligent optical network will be divided into multiple control domains based ondistributed management. The signaling and resource reservation mechanisms which has been applied to single-domain optical network have to be expanded to adapt to the multi-domain optical networks,and face to more complex problems.This paper concentrates on research of extending the single-domain optical network signaling and resource reservation to multi-domain optical network.Signaling function of control plane is developed based on RSVP-TE protocol in multi-domain optical network. On the basis of function extensions, call processing, the connection process of RSVP-TE protocol in single-domain optical network,multi-domain serial signaling domain and multi-domain parallel signaling process based on source routing are realized in multi-domain optical networks.The basic forward and backward reservation reservation strategy in the single domain optical networks is extended based on signaling functions, to achieve a variety of resource reservation strategies in multi-domain optical networks, including multi-domain Conservative forward reservation scheme,multi-domain greedy forward reservation scheme,multi-domain backward reservation scheme and multi-domain Quasi-parallel reservation scheme.Through simulation and the simulation analysis of the data, it draw some important conclusions:in multi-domain forward reservation scheme connection is established with a faster speed, but the whole network blocking rate was high; multi-domain backward reservation scheme makes the connection speed slower, but it can get a lower blocking rate; quasi-parallel multi-domain connection scheme can improve the speed of the connection establishment to achieve the purpose of distributed quickly.In the basis of multi-domain optical network signaling and reservation mechanism research,I extended the research to the resolution of the conflict in the resource reservation in inter-domain. Aim to the inter-domain link resource reservation conflicts in multi-domain optical networks, we propose a new settlement mechanism:A reservation mechanism between the same level of business for inter-domain links based on the comparison of the reserved path length and the relevant protocols has been extended..The simulation experiments compare this mechanism with forward reservation protocol (FRP) and backward reservation protocol (BRP). It achieves the trade-off between blocking probability and connection setup time in the multi-domain optical network,an combines the Advantages of forward reservation protocol (FRP) and backward reservation protocol (BRP).