A TMN system for VPC and routing management in ATM networks [chapter]

D. P. Griffin, P. Georgatsos
1995 Integrated Network Management IV  
In this paper we present a VPC and Routing Management Service for multi-class ATM networks. Considering the requirements, we decompose the Management Service into a number of distinct but cooperating functional components which we map to the TMN architecture. We describe the architectural components and analyse their operational dependencies and information exchange in the context of the overall system operation. The proposed system offers the generic functions of performance monitoring, load
more » ... nitoring and configuration management in ATM networks. In addition, it provides specific functions for routing and bandwidth management in a hierarchical structure. A. S. Sethi et al. (eds.), Integrated Network Management IV © Springer Science+Business Media Dordrecht 1995 A TMN system for VPC and routing management in ATM networks 357 Routing in Asynchronous Transfer Mode (ATM) (ITU I.150) is based on Virtual Path Connections (VPCs). A route is defined as a concatenation of VPCs, where each VPC is defined as a sequence of links being allocated a specific portion of the link capacity. It has been widely accepted that VPCs offer valuable features that enable the construction of economical and efficient ATM networks, the most important being management flexibility. Because VPCs are defined by configurable parameters, these parameters and subsequently the routes based on them can be configured on-line by a management system according to network conditions. Since user behaviour changes dynamically there is a danger that the network may become inefficient when the bandwidth allocated to VPCs or the existing routes are not in accordance with the quantity of traffic that is required to be routed over them. To combat this, the VPC topology, the routes, and the bandwidth allocated to VPCs must be dynamically re-configured. A VPC and Routing management system is required to take advantage of the features of VPCs while ensuring that the performance of the network is as high as possible during conditions of changing traffic. The ITU-T have distinguished between the management and control planes in the operation of communications networks (ITU I.320, 1.321) and introduced the Telecommunications Management Network (TMN) (ITU M.3010) as a means of provisioning management systems with standard interoperable components according to the ISO systems management standards. The TMN should compliment and enhance the control plane functions by configuring operational parameters. The TMN should not replace the control plane and in general it has less stringent requirements on real-time response. Although there is a significant research interest in the area of performance management on ATM particularly in routing (Sykas 1991, Gelenbe 1994), bandwidth assignment (Hui 1988, Saito 1991) and VPC management (Ohta 1992, Sato 1991, the problem of VPC and routing management remains largely open. The majority of management systems deployed today are concerned with network configuration and network monitoring and the management intelligence is provided by the human users of the management systems. There is a trend (Woodruff 1990, Wernic 1992 , Geihs, 1992 to increase the intelligence of the management functions to encapsulate human management intelligence in decision making TMN components to move towards the automation of the monitoring, decision making and configuration management loop. Within the framework of performance management this paper investigates the requirements of VPC and routing management functions for ATM based B-ISON networks and proposes a TMN system for implementation. The ITU-T terminology (ITU M.3020) for describing Management Services is adopted. In particular the paper proposes a Management Service for VPC and routing management and decomposes it into a number of components. The design is mapped to the TMN architecture for implementation using TMN and OSI systems management principles. Section 2 defines the VPC and Routing Management Service and section 3 discusses the environmental assumptions and constraints. Section 4 presents the decomposition into management components and outlines the rationale behind it. The mapping to the TMN architecture is also presented in this section. Section 5 details the management components and section 6 describes their interactions and their relationships. Finally section 7 presents the conclusions and identifies future work. THE MANAGEMENT SERVICE Within a multi-class ATM network environment the objective of the VPC and Routing Management Service is to guarantee network availability whilst guaranteeing that the network meets the performance requirements of the different service classes. This Management Service is
doi:10.1007/978-0-387-34890-2_32 fatcat:whfxpksjj5gslk54bc6gx4dm7i