Tunnel Broker model, as defined in RFC3053, is a solution to the automation of IPv6 address assignment and IPv6 over IPv4 tunnel management. Tunnel server selection and fault tolerance are two big problems for a Tunnel Broker system. Anycast makes it possible to solve the tunnel server selection problem and improve the system’s fault tolerance. This paper proposes an architecture of the Tunnel ...

The Eternal system pioneered the interception approach to providing transparent fault tolerance for CORBA, which allows it to make a CORBA application reliable with little or no modification to the application or the ORB. The design and implementation of the Eternal system has influenced industrial practices by providing the basis for the specifications of the Fault-Tolerant CORBA standard that...

Reliability is one of the fundamental considerations in the design of industrial control equipment. The microprocessor-based Hybrid Duplex fault-tolerant System (HDS) proposed in this paper has high reliability to meet this demand although its hardware structure is simple. The hardware configuration of HDS and the fault tolerance of this system are described. The switching control strategies in...

In this paper we identify the needs and critical issues of management and monitoring in IP Multimedia Subsystem (IMS). As an IMS provides a layered architecture converging heterogeneous networks; it requires network management as well as service management. We provide a framework for managing an IMS system by utilizing network management server, session management and service managed objects (S...

Traditional centralized network management solutions do not scale to presentday large-de computerlcommunleation networks. They suffer from certain other drawbacks tw: a *@e point of failure and hence lack of fault toleranee, and heavy eommunieadon costs asraeiated with the central manager. It har been recognized that decentrallzatloddlstributed solutions can solve some of the problem arroeiated...

It is often useful to examine MIB objects of a faulty agent in order to determine why it is faulty. This paper presents a new framework for semi-active replication of SNMP management objects in local area networks. The framework is based on groups of agents that communicate with each other using reliable multicast. A group of agents provides fault-tolerant object functionality. A SNMP service i...

Telepresence robot extends operation in remote locations. This feature can be beneficial for several applications, such as subsea exploration, telesurgery, remote physical presence, etc. Especially, the remote physical presence application will enable individuals with mobility limitations such as disabled veteran or police officer to perform regular duties through telepresence robots known as T...

microgrid presents an efficient and novel solution for integrating many new energy generating resources with traditional distribution networks. having an appropriate protective scheme is a fundamental challenge in achieving microgrid plans. it is proven that traditional protective plans are not efficient for protecting microgrid, since the network is dynamic and the level of fault current chang...