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Over the past few years, utility applications and services have been evolving from stand alone propriety protocol based to a standardized IP platform based [1]. These utility applications include Synchrophasors, CRAS, SCADA etc. During the same period, use of the enterprise network has moved from simple IP applications to an ever increasing number of advanced technologies being collapsed onto the...
The transport stratum in the ITU-T Next Generation Networks (NGN) is expected to provide end-to-end connectivity according to the service requirements, the terminal capability and status of the network resource availability. Whereas mature technologies and protocols, such as DiffServ and MPLS, are available to satisfy these requirements, some issues are still open concerning the capability to provide...
This article proposes an Active-Fault-Alarm (AFA) based Dynamic Temporary Protection Mechanism (DTPM) that is applied into the multi-protocol label switching transport profile (MPLS-TP) optical network. The new DTPM, by using the AFA function, can establish dynamically the so called temporary protection path (TPP) for the work path in advance before possible fault occurs and keep flexibly the TPP...
The ITU-T defined next generation network (NGN) architecture designates the resource admission control function to perform the application-driven Quality of Service (QoS) control across access and core networks. The Generalized Multiprotocol Label Switching (GMPLS) was introduced by the Internet Engineering Task Force (IETF) to cope with new traffic engineering challenges in fast optical networks...
Connection-oriented path setup is becoming one of the key features of the next-generation Internet with the Multi-Protocol Label Switched (MPLS) framework and its generalized version GMPLS addressing the automated label switched path (LSP) setup. Despite the significant technological progress in various LSP implementations, the integration of robust security features for authentication and authorization...
IETF is working on the design of new architectures and signaling solutions to support inter-AS (autonomous system) GMPLS-TE (generalized multi protocol label switching with traffic engineering) for multi-domain, multi-carrier connection setup with guaranteed quality of service (QoS). In addition, the path computation element (PCE) working group is developing the framework for inter-domain path computation...
Providing network QoS involves, among other things, ensuring network survivability in spite of network faults. Fault recovery mechanisms should reduce recovery time, especially for real-time and mission-critical applications while guaranteeing QoS requirements, in terms of bandwidth and delay constraints and maximizing network resources utilization. In this paper, we propose a scalable recovery mechanism...
In this paper, we present the design and implementation of IPv6 packet forwarding engine for flow based router which has the capability to handle several millions of flows at wire speed in high-speed networks. The IPv6 packet forwarding engine allows the improvement of both its performance and its flexibility with existing network processors. The functionality of the design has been tested using the...
This paper evaluates the efficiency of set of modifications to the border gateway protocol (BGP) which aim at providing flexible traffic engineering (TE) across multiple GMPLS domains. A short overview and analysis of existing proposals for BGP-TE extensions is presented. Based on that, three modifications are proposed for support of multi-domain TE: an end-to-end path-specific TE attribute, a border...
We present a GMPLS-compliant path selection algorithm that supports QoS in multi-domain optical networks. Simulation results show that using TE metrics as the primary path selection criterion is beneficial for networks with long connection durations.
This paper reports the experimental validation of a SIP-based service platform for optical transport networks. The platform enables applications to trigger network resource reservation during the session signaling thanks to a consistent network node configuration.
The next generation Internet Protocol, IPv6, has attracted growing attention and has been deploying worldwide, especially in Europe, Asia, and North America. It intends to provide better QoS (quality of service) ability for the increasing demanding multimedia service, and FL (flowlabel) field in IPv6 main header was designed to be a big help in alleviating QoS problem. However, the related research...
With the significant increase in the Internet applications and services which have definite QoS requirements and the resources on the Internet being shared, the need of end-to-end QoS sessions has become critical. The existing QoS mechanisms provide the path selection mechanism in distributed manner which do not necessarily support the end-to-end QoS requirements. We build propose an evolutionary...
As the next generation Internet (NGI) is coming, and with the rapid development and great research progress achieved, mobile Internet Protocol version 6 (MIPv6) based network has become a hotspot all over the world. Considering of the rapid growth of network service quality and data exchange requirement, we are going to propose a new data exchange method in this paper. This method uses resource reservation...
In this paper, we discuss currently evolving technologies for packet based real-time voice communication. Packet based voice has gained popularity in the toll-quality market due to its flexibility and cost effectiveness. IMS (IP Multimedia Subsystem) is being developed for converged voice and data services. While initially it was intended for mobile networks, it has been expanded to include support...
The Internet Protocol version 6 (IPv6) protocol represents an emerging networking capability designed to enhance transport, management and security of IP packets through the networks. IPv6 packet header required for this protocol is much larger than that of the current IPv4 protocol. The processing of IPv6 packets can be complex depending on how many packet header options are needed for a given mode...
Initial entry during deployment requires tactical networks supporting voice, video, and data requirements to be established quickly given little existing telecommunication infrastructure. Wireless mesh networks using contention-based medium access control (MAC) appear to be an easy off-the-shelf solution, but their performance is lacking for support of such diverse high-bandwidth low-latency requirements...
An on-demand multi-user lightpath sharing solution supporting multi-path parallel transport is experimentally demonstrated in GMPLS-enabled lambda grid testbed for the first time. Experimental results show that end-to-end lightpath can be simultaneously employed by two or more grid users according to their dynamic requests.
A virtual private network (VPN) can be defined as a way to provide secure communication between members of a group through use of public telecommunication infrastructure, maintaining privacy through the use of a tunneling protocol and security procedures. There are many different VPN solutions out there, and just deciding which one to choose can be difficult since they all have advantages and disadvantages...
Broadcast TV distribution over an IP network requires stringent QoS constraints, such as low latency and loss. The main challenge to achieving these QoS objectives is how to design the network to respond to network failures. Streaming content in IPTV is typically delivered to the distribution points on the IP backbone using IP multicast, and in the case being considered, with protocol independent...
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