The Path Computation Element (PCE)

2015 ◽  
pp. 237-266 ◽  
Author(s):  
Francesco Paolucci ◽  
Filippo Cugini
Keyword(s):  
Optical Networks ◽  
Task Force ◽  
Network Resource ◽  
Internet Applications ◽  
Path Computation ◽  
Adequate Quality ◽  
Implementation Aspects ◽  
Effective Network ◽  
Path Computation Element

The Internet Engineering Task Force (IETF) has promoted the Path Computation Element (PCE) architecture to provide effective network resource utilization while guaranteeing advanced Internet applications with adequate quality of service (QoS). The PCE is a dedicated network entity devoted to path computation. This chapter presents the state-of-the-art of the PCE architecture for different networking scenarios including single-domain networks, optical networks, and multi-domain/layer networks. Relevant architectural and implementation aspects are analyzed and discussed, highlighting related benefits, limitations and open issues. Recent progresses and future directions are also addressed, including the PCE evolution to operate in the context of software defined networking.

Quality of Service Architectures

2008 ◽  
pp. 425-431
Author(s):  
Christos Bouras ◽  
Apostolos Gkamas ◽  
Dimitris Primpas ◽  
Kostas Stamos
Keyword(s):  
Quality Of Service ◽  
Ip Networks ◽  
Multimedia Data ◽  
Network Resource ◽  
Internet Applications ◽  
Service Guarantees ◽  
Data Flows ◽  
Almost All ◽  
Speed And Accuracy

IP networks are built around the idea of best effort networking, which makes no guarantees regarding the delivery, speed, and accuracy of the transmitted data. While this model is suitable for a large number of applications, and works well for almost all applications when the network load is low (and therefore there is no congestion), there are two main factors that lead to the need for an additional capability of quality of service guarantees. One is the fact that an increasing number of Internet applications are related to real-time and other multimedia data, which have greater service requirements in order to be satisfying to the user. The other is that Internet usage is steadily increasing, and although the network infrastructure is also updated often, it is not always certain that network resource offerings will be ahead of usage demand. In order to deal with this situation, IETF has developed two architectures in order to enable QoS-based handling of data flows in IP networks. This article describes and compares these two architectures.

Design of contention resolution over backup path in path computation element based wavelength-switched optical networks

2010 ◽  
Vol 8 (4) ◽  
pp. 372-376
Author(s):  
侯连兴 Lianxing Hou ◽  
陆月明 Yueming Lu ◽  
王俊华 Junhua Wang ◽  
纪越峰 Yuefeng Ji
Keyword(s):  
Optical Networks ◽  
Contention Resolution ◽  
Backup Path ◽  
Path Computation ◽  
Path Computation Element

A Dynamic Resilience Approach for WDM Optical Networks

2017 ◽  
Vol 38 (4) ◽  
Author(s):  
Amit Kumar Garg
Keyword(s):  
Optical Networks ◽  
Blocking Probability ◽  
Quality Of Services ◽  
Optical Fibres ◽  
Wdm Optical Networks ◽  
Network Resource ◽  
Communication Services ◽  
Single Link ◽  
Simulation Results

AbstractOptical fibres 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. This paper has been focused only on survivable schemes in order to guarantee both protection and restoration in WDM optical networks. In this paper, a dynamic resilience approach has been proposed whose objective is to route the flows in a way which minimizes the total amount of bandwidth used for working and protection paths. In the proposed approach, path-based protection is utilized because it yields lower overhead and is also suitable for global optimization where, in case of a single link failure, all the flows utilizing the failed link are re-routed to a pre-computed set of paths. The simulation results demonstrate that proposed approach is much more efficient as it provides better quality of services (QoS) in terms of network resource utilization, blocking probability etc. as compared to conventional protection and restoration schemes. The proposed approach seems to offer an attractive combination of features, with both ring like speed and mesh-like efficiency.

Survey on Path Computation Element extensions for Spectrum Switched Optical Networks

2013 ◽  
Author(s):  
Joana Socrates Dantas ◽  
Davide Careglio ◽  
Regina Melo Silveira ◽  
Wilson Vicente Ruggiero ◽  
Josep Sole-Pareta
Keyword(s):  
Optical Networks ◽  
Path Computation ◽  
Path Computation Element

Extending path computation element for lightpath restoration in wavelength-switched optical networks

2010 ◽  
Vol 8 (2) ◽  
pp. 142-145 ◽  
Author(s):  
侯连兴 Lianxing Hou ◽  
陆月明 Yueming Lu ◽  
王俊华 Junhua Wang ◽  
纪越峰 Yuefeng Ji ◽  
华一强 Yiqiang Hua
Keyword(s):  
Optical Networks ◽  
Path Computation ◽  
Path Computation Element
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