The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In recent days, optical fibers have been developed as a transmission medium to carry traffic in order to provide various services in telecommunications platform. Failure of this fibre caused loss of data which can interrupt communication services. Thus, this paper will focus about protection scheme in order to guarantee the survivability of the networks. Besides, the scheme should provide better quality...
Future networks require virtual network topology management method using distributed PCEs for multi-layer multi-domain path computations. Once a path is established within a lower layer, it can be used as a data link in an upper layer and it can be advertised as a Traffic Engineering Link and exploited in the path computation by an upper layer. This paper presents cross-layer provisioning system architecture...
In this paper an OFS architecture that exploits the strength of optics to serve large transactions is described. The shift towards OFS requires some architectural elements of the network- from the physical layer to the higher network layers, as well as network management and control, be substantially redesigned at the fundamental level for the network architecture to be scalable and implementable.
This paper proposes a joint storage-network resource management for a super high-definition video delivery service. The method for allocating storage and optical path resources is discussed. The feasibility of the proposed system is shown.
Dynamic capacity migration between circuit and packet networks is an unexplored topic, but it can be an effective way to improve network utilization. We discuss techniques for dynamic capacity sharing between circuit and packet services.
Technologies for fiber nonlinearity management for spectrally-efficient high-speed optical transmission systems have been discussed from a carrier perspective. While optimal electrical dispersion management remains an effective method, new ultra-low-nonlinearity fiber could provide additional benefits.
The OTN over WDM network is one of the best solutions of the optical transmission network. As a traditional multi-layer network, multi-layer traffic grooming algorithms in the OTN over WDM network have been fully studied. However, the cross-connects capacity management problem of the OTN node in the OTN over WDM network is still under study. In our previous work, an OTN over WDM numeric model is proposed...
Future optical backbone networks will be able to dynamically reconfigure optical connections in a few minutes and migrate the routes of existing connections with little service interruption at the IP layer, using the optical bridge-and-roll technique. A high data-rate dynamic wavelength service for these networks will provide more flexible connection services to customers. A customer owns or leases...
This paper considers the problem of where a survivability technique should be deployed in a network based on managing risk given a limited financial budget. We formulate three novel risk management resilient network design techniques: (1) minimize the maximum damage that could occur in the network, (2) minimize the maximum risk in the network and (3) minimize the root mean squared damage. The first...
This paper reports a novel physical layer monitoring technique called Centralized Failure Detection System (CFDS) based on the use of an optical time domain reflectometry (OTDR) and integrated with inexpensive additional optical devices at the middle of the network system for monitoring the fiber plant of a wide range of passive optical network (PON) based intelligent fiber-to-the-home (i-FTTH) in...
NGN is a new public telecommunication network based on IP technology and has achieved audio, video and data signal transmission and management, and can provide a variety of broadband applications and traditional telecom services. NGN needs a variety of technical support as well as in have made a very good development prospects at home and abroad.
The success of Generalized Multi-protocol Label Switching (GMPLS) provides a solution that enhances IP by its remarkably advanced features particularly the improvement in data transfer rate. GMPLS can be well classified, managed and policed across different types of networks. In this paper, we discuss the GMPLS and its application for core optical network. The IP and optical layers are converging...
Internet traffic has been growing quickly for many years and this growth will continue in the future (despite temporarily adverse economic conditions) requiring enhanced network technologies. Also to cope with this evolution, the cost of today's network solutions is still too high. In addition, in line with the EC goal of reducing the overall emissions, energy efficiency should be widely improved,...
A lightpath route management system with parallel processing capabilities and a flexible upgradability, allowing new functions to be added to the system without any system program changes, has been designed and implemented for IP-over-CWDM networks with ROADMs. The system can process route management functions composed of some sub applications in parallel in multi machines for high speed performance...
Translucency in WDM networks appears as a trade-off between the low cost of full transparency and the high signal quality provided by full opacity. On the one hand, transparent networks undergo various transmission impairments due to optical components deployed in the network. On the other hand, opaque networks remain very expensive due to electrical 3R regeneration (Re-amplifying, Re-shaping, and...
Applicability of all-optical sampling based Q-factor monitor has been successfully verified for link-by-link fault management in transparent optical mesh networks by comparing with an electrical receiver.
Experimental validation of a service oriented optical network architecture based on SIP for on-demand session management is presented in this paper. The service set-up delay is evaluated under different traffic conditions and network equipment capabilities.
A Path Computation Element (PCE) is a computing device in a network capable of calculating paths. Once a PCE receives a path computation request, the PCE is suppose to provide a response within a reasonable short time. However, computing a feasible path is not a straightforward task, since the computational problem must consider several constraints in a short time. In this paper we propose an algorithm...
Quality of service (QoS) is an important objective of large telecommunications carriers. Network restoration is the prime capability needed to achieve this objective. While a large body of publications study and propose different restoration methods and network optimization algorithms, very few have actually been implemented. To address this, we present background on how today's large carrier terrestrial...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.