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This paper discusses the viability of using Session Initiation Protocol (SIP) transport for Smart Grid signaling. Smart grids will jointly optimize energy production and demand, in a scenario with millions of smart meters and microenergy sources (e.g. solar panels or electric cars). This will place stringent requirements on telco networks. Information technologies will have to provide scalable signaling...
Over the last years the IP Multimedia Subsystem (IMS) has continuously gained in importance as the next generation communication network. The Session Initiation Protocol (SIP) was chosen the signaling protocol for session establishment and control in IMS. Losses caused by network or server overload would cause retransmissions and delays in the session establishment and would hence reduce the perceived...
With the increasing use of session initiation protocol (SIP) in large deployments and the fact that numerous conventional communication networks have been spread, it is profitably to build a next generation network (NGN) linking circuit and packet-switched networks. This paper is concerned with the quality-of-service (QoS) parameters estimation problem in NGN. We have proposed a mathematical model...
In current 802.11 wireless networks, the Quality of Service (QoS) of Session Initiation Protocol (SIP) multimedia services may be affected by other best-effort services. Moreover, the IP/port information of a SIP multimedia service is dynamically allocated and not easily identified. To solve the above problems, this paper proposes a call server integrated approach where we assign the high-priority...
Service quality and user-perceived experience has been a networking research topic for many years. Whereas most related work concentrates on the quality of media, only very few papers, however, discuss the performance of the signaling for those media. This paper addresses the performance of the Session Initiation Protocol (SIP) which is very popular with Next Generation Networks (NGN). A collection...
The performance of signaling protocols in circuit and packet switching networks is a significant parameter to evaluate the performance of any telecom operator. Today, users demand continuous high data rate, service availability, network reliability, mobility, QoS and minimum service initialization time. IP Multimedia Subsystem (IMS) standardized Session Initiation Protocol (SIP), which categorize...
Defined by the 3GPP, the IP multimedia subsystem (IMS) is an architectural framework that enables the delivery of multimedia services in mobile networks. Based on the session initiation protocol, the IMS offers unified billing, QoS negotiation mechanisms, and the possibility of combining services deployed in different environments like CAMEL and Parlay OSA. With the aim of determining the real limitations...
In this paper we present an analysis on Policy and Charging Control (PCC) functions in all IP-based multimedia networks and identify the required functionality for quality of service (QoS) monitoring. The support of "Application-driven Quality of Service" (ADQ) Parlay X Web Service to reporting function in PCC is evaluated and improvements of ADQ interfaces are suggested without violating...
The IP Multimedia Subsystem (IMS) defined by the 3rd Generation Partnership Project (3GPP) and 3GPP2 provides a platform for the provision of multimedia services with quality of service (QoS). In addition, this service architecture allows third-party vendors to create advanced multimedia and multisession services across wireless and wireline network access. The Session Initiation Protocol (SIP) supports...
Supporting Quality of Service (QoS) in a core transport is an important feature of a next generation network. This feature not only enables real-time communication services such as Voice over IP (VoIP) and video telephony, but also helps create new applications. However, access gateway such as Packet Data Gateway (PDG) in IMS WLAN Interworking, located at the edge of an IMS core network, must inspect...
The IMS (IP multimedia subsystem) control infrastructure aims at integrating QoS management functionality into IP services networks. The present contribution explores the approach enforced by 3GPP standards in this respect and describes implementation results in realistic scenarios based on the DiffServ model.
Session-based QoS control mechanism is a key characteristic in next generation networks (NGN). However, the session-based QoS control defined in NGN standardizations is not designed for layer 2 infrastructures, but for border gateway function (BGF) at IP edge. To achieve QoS assurance for NGN services, end-to-end network resource management, including layer 2 access and metro networks, is required...
Conceptual framework of next generation network (NGN) is based on Internet protocol (IP) transport technology, which is generally accepted as the optimal solution for delivering of next generation multimedia services. Although packet-switched networks are in the mainstream, decades of experience with circuit-switched networks still set expectations when it comes to quality of service (QoS). As opposed...
SIP flow management should respect the specific characteristics of SIP protocol applied in multimedia or telecom services for meeting stringent quality of service (QoS) requirement. The specific characteristics include explicit session structure for correlating a series of SIP messages, stringent response time required by real-time applications, extra overhead imposed by SIP message retransmission,...
The IP Multimedia Subsystem (IMS) is a converged service enabler that facilitates the rapid deployment of multimedia services in IP networks. The IMS defines a Policy Based Management model to ensure QoS-enabled connectivity by providing mediation and interaction between applications and transport layer resources. This paper reviews the current state of the art regarding the necessary mediation between...
The critical issue of P2P models for supporting Internet telephony are: users localization and their ldquoasynchronousrdquo nature. In this paper, we propose a new P2P-SIP architecture for Internet telephony; aims to support the asynchronous model that generally characterized P2P systems. The purpose is to optimize the global end-to-end delay, which is one of the main performance metrics for telephony...
Signaling flow transmission is of the most importance in the discussion of the Quality of Service (QoS) problem of the Next Generation Network (NGN). For implementing service reachability, the signaling flow of the NGN services should be transmitted reliably and with the highest priority. Because the signaling flows and the media flows of the NGN service are mixed while being transmitted, the present...
High-speed switching, QoS (quality of service) provisioning, security, and mobility are main challenges faced with existing networks and to be confronted by next generation network (NGN) researchers and developers. To address these challenges, a new architecture called SUPANET (single-layer user-data switching platform architecture network) has been developed. But most of works on SUPANET have been...
Signaling flow and media flow packets are mixed in transmission over a unified Internet Protocol (IP)-based infrastructure. That makes it difficult for an IP network node to identify whether the transmitted packet is signaling flow or media flow packet, and guarantee that signaling flow packets are not delayed or discarded in case of congestion caused by link failure. Exceeding standard defined values...
The purpose of this paper is to provide an insight in the process of obtaining and interpreting values of the collection of metrics that are intended for performance evaluation of the Session Initiation Protocol (SIP). Three of the analyzed metrics are defined in a recently proposed Internet Engineering Task Force (IETF) draft, however, additional two metrics addressing negotiation and renegotiation...
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