Research Of QoS Signaling Based On Next Step In Signaling

With the rapid development of mobile communication technology, real-time services are applying in mobile environment. There are new requirements of QoS (Quality of Service) guarantee in mobile environment. How to provide QoS guarantee in the Mobile IPv6 network is becoming a hot topic.The existing solutions of QoS in Mobile IPv6 are almost based on RSVP. However, there're many unsolvable problems such as security, flexibility, scalability in RSVP. In this paper we introduce Next Step inSignaling------NSIS. According to the modular requirement, NSISprotocol suite is structured in two layers: signaling transport layer(NTLP) and signaling application layer(NSLP). And the layered architecture determines the flexibility and scalability of NSIS.This paper firstly gives a detail introduction of the two layers' architecture of Next Step In Signaling, describes the existed solutions of IP QoS architecture. And then it analyzes the possible problems Next Step In signaling would face in mobile IPv6 environment and proposes an end-to-end solution for it. At the end of the paper, a software design and implementation of QoS NSLP based on NS2 simulation platform is given.In this paper, we propose an end-to-end QoS provisioning mechanism based on NSIS (Next Step In Signaling) protocol suite in mobile IPv6 environment. Resource reservation on the new path must be done as quickly as possible after handover event for the Mobile Node (MN) which is especially important when real-time applications are used. We focus on end-to-end procedure for a fast QoS re-establishment, the basic idea of which is to reduce the time between the handover event and NSIS state re-establishment on the new path. It is designed to send the NSIS signaling message together with Binding Update (BU)/Binding Acknowledgement (BA) after handover, in order to avoid wasting time to wait for mobility detecting.