As the value-added service providing system in the Next-Generation Networks (NGN), Application Servers (AS) are required to provide the carrier-class reliability. To increase the reliability of AS, the fault-tolerant ...As the value-added service providing system in the Next-Generation Networks (NGN), Application Servers (AS) are required to provide the carrier-class reliability. To increase the reliability of AS, the fault-tolerant technology is often adopted. This paper proposes a fault-tolerant architecture for AS against single-point faults. The result of analysis shows that the architecture has a good reliability and is easily extendable. Such an advantage is attributed to a kind of special fault-tolerant design, which is different from others in that two Service Logic Program (SLP) instances do not only provide backups to each other, but also share them in the service traffic.展开更多
Parlay X is a set of simple and easy-understanding Application ProgrammingInterfaces (APIs), which abstract the fundamental functions of the telecommunication networks on thehigher layer than Parlay. Parlay X Web Serv...Parlay X is a set of simple and easy-understanding Application ProgrammingInterfaces (APIs), which abstract the fundamental functions of the telecommunication networks on thehigher layer than Parlay. Parlay X Web Service adopts Web Service technology to open services forIT developers to use in the applications they develop. In this paper, Web Service Flow Language(WSFL) is introduced to describe the services based on Parlay X Web Service, and an applicationinstance is presented.展开更多
文摘As the value-added service providing system in the Next-Generation Networks (NGN), Application Servers (AS) are required to provide the carrier-class reliability. To increase the reliability of AS, the fault-tolerant technology is often adopted. This paper proposes a fault-tolerant architecture for AS against single-point faults. The result of analysis shows that the architecture has a good reliability and is easily extendable. Such an advantage is attributed to a kind of special fault-tolerant design, which is different from others in that two Service Logic Program (SLP) instances do not only provide backups to each other, but also share them in the service traffic.
基金This work is supported by ZTH Sciences Research Foundation(No.2003W24).
文摘Parlay X is a set of simple and easy-understanding Application ProgrammingInterfaces (APIs), which abstract the fundamental functions of the telecommunication networks on thehigher layer than Parlay. Parlay X Web Service adopts Web Service technology to open services forIT developers to use in the applications they develop. In this paper, Web Service Flow Language(WSFL) is introduced to describe the services based on Parlay X Web Service, and an applicationinstance is presented.
