Papers by Prosper Chemouil
Thi s paper deals wi th short-tenn traffi c for. ecasting methods in telephone networks. Analysis... more Thi s paper deals wi th short-tenn traffi c for. ecasting methods in telephone networks. Analysis in traffic observations shows that there exist substantial variations within a season. Then traffic routing patterns could be updated during the year according to seasonal load variations in order to take advantage of the non-coincidence of the traffic flows. A preliminary step to implement multi season traffic routing is however to determine reliable and precise forecasting models. In this paper attention is focused on this last item and an adaptive forecasting method is proposed using Kalman filtering.
In the paper models for analysis and control of time-varying circuitswi tched traffi care develop... more In the paper models for analysis and control of time-varying circuitswi tched traffi care developed. The fi rst descri pti on refers to online traffic measurements. The second one models mean quantities. The rel evance of both model 1 i ng techni ques to real-time management and control of networks with non-hierarchical routing is discussed.
This paper deals with adaptive traffic routing in telephone networks. At present di mens i oni ng... more This paper deals with adaptive traffic routing in telephone networks. At present di mens i oni ng and traffi c routi ng are determi ned once a year in order to meet some predefi ned grade of servi ce requirements. For technological reasons, i.e. electromechanical switching centres, call routing is now defined according to some fixed static procedure. In order to provide protection against important di sturbances, the network has then to be overdimensioned at the planning stage. The emergence of stored program control networks consisting of electronic switching centres interconnected by common channel signalling links is making possible a new strategy -adaptive traffic routing -, which allows real-time reaction to changes of the network state due to overloads or failures. Several adaptive traffic routing algori thms are therefore descri bed and compared on a testbed network in order to improve network performances.
This paper deals with the problem of designing control procedures which are needed when introduci... more This paper deals with the problem of designing control procedures which are needed when introducing new services in signalling networks. Performance evaluation methods are required in order to ana1yze congestion control effects on the network, and to adapt flow control procedures to the network operating conditions. The exact solution of a congestion control procedure model enab1 es us to develop a fast simu1 ati on method. Simu1ations are carried out on a representative tes tbed network wi th different traffi c hypotheses. Ana 1ys i s ·of resu1 ts shows the adequacy of the congestion control procedure, and highlights how flow control is involved.
As the Telecommunications Network Management (TMN) standardization is progressing within the ITU-... more As the Telecommunications Network Management (TMN) standardization is progressing within the ITU-T and other international bodies, traffic engineering and network traffic management should become more and more impacted by the results of such an evolution. The objective of this article is on the one hand, to give an overview of the current TMN standardization achievement, focusing on the traffic area, and on the other hand, to point out issues and perspectives that are likely to affect the teletraffic domain in the future.
Future Internet (FI) research and development threads have recently been gaining momentum all ove... more Future Internet (FI) research and development threads have recently been gaining momentum all over the world and as such the international race to create a new generation Internet is in full swing: GENI [16], Asia Future Internet [19], Future Internet Forum Korea [18], European Union Future Internet Assembly (FIA) [8]. This is a position paper identifying the research orientation with a time horizon of 10 years, together with the key challenges for the capabilities in the Management and Service-aware Networking Architectures (MANA) part of the Future Internet (FI) allowing for parallel and federated Internet(s).
This paper concerns the development of a fuzzy controller for adaptive traffic routing in telepho... more This paper concerns the development of a fuzzy controller for adaptive traffic routing in telephone networks. As the information related to network performance is unprecise by nature, a simplified inference method has been derived which attempts to represent gradual inference rules using a fuzzy logic approach. The analysis of preliminary results obtained from this system is carried out on a significant testbed network to validate the approach.
This paper proposes the application of artificial intelligence techniques to real-time circuit-sw... more This paper proposes the application of artificial intelligence techniques to real-time circuit-switched network management. We deal with two problems : first diagnosis making to detect abnormal situations in the network, second application of the best set of traffic controls in order to guarantee optimal performance during network degradation. We present the methodology to set up the knowledge rules which feed the expert system under consideration. Finally we present a prototype of the expert system which was developed for a model of the French long distance network.
This paper presents applications of artificial intelligence techniques to real-time circuit-switc... more This paper presents applications of artificial intelligence techniques to real-time circuit-switched network management. We focus on the problem of diagnosis making in order to detect and identify abnormal situations in the network. Two different approaches respectively based on expert system and neural trees are proposed. The methodologies underlying the two solutions are presented as well as the prototypes that have been developed. Finally, case studies leading to a comparison of both approaches are described.
The paper presents various options of routing architectures for Asynchronous Transfer Mode networ... more The paper presents various options of routing architectures for Asynchronous Transfer Mode networks based on currently developed User/Network Interface (UNI) protocols. The bandwidth reallocation, routing updating, and call connection levels are distinguished. Functions of corresponding procedures are defined with respect to traffic performance requirements and related to the ATM protocol layers. An architecture of the ATM node is briefly discussed.
This paper describes the application of artificial intelligence techniques to network management.... more This paper describes the application of artificial intelligence techniques to network management. More precisely, we focus our attention to the real-time diagnosis of abnormal situations in circuit-switched networks. We detail the methodology to set up the knowledge rules which feed the expert system under consideration. Finally we present a prototype of the expert system which was developed for a model of the French long distance network.
The paper provides a framework for the analysis of interworking between the real-time traffic man... more The paper provides a framework for the analysis of interworking between the real-time traffic management systems of domestic networks and their international gateways. It presents the traffic control architecture for a Worldwide Intelligent Network (WIN). The proposed design takes into account costs which are incurred by the implementation of Operation Support Systems associated with particular algorithms. The rudiments of the Multi-layer Operation Support System (MOSS) architecture are developed and used to define entities subject to future standardization. Theoretical issues related to the multi-layer framework are briefly discussed to set up a scene for further research. The paper takes into account practical problems of WIN design as well as for research directions in that area which were discussed during the Seminar on WIN Design and Control held in Paris in June 1990.
This paper is concerned with a performance analysis of adaptive traffic routing in the telephone ... more This paper is concerned with a performance analysis of adaptive traffic routing in the telephone network of the city of Marseilles, France. We first mention the main reasons of introducing flexible routing, in particular statedependent routing, in modern telephone networks. We then present the Marseilles network under study and we briefly describe the routing algorithm and the network design method we used. Next we consider a number of scenarios ranging from traffic overloads to network failures in order to evaluate the robustness and performance of the adaptively routed network. Simulations are presented and analyzed which emphasize the role of state-dependent routing in network efficiency. In some specific cases, the state-dependent routing is complemented with protective control actions in order to limit low priority or overflow traffic, which result in improved grade of service. 9.3.1.
In 2013, the IEEE Future Directions Committee (FDC) formed an SDN work group to explore the amoun... more In 2013, the IEEE Future Directions Committee (FDC) formed an SDN work group to explore the amount of interest in forming an IEEE Software-Defined Network (SDN) Community. To this end, a Workshop on "SDN for Future Networks and Services" (SDN4FNS'13) was organized in Trento, Italy (Nov. 11 th -13 th 2013). Following the results of the workshop, in this paper, we have further analyzed scenarios, prior-art, state of standardization, and further discussed the main technical challenges and socio-economic aspects of SDN and virtualization in future networks and services. A number of research and development directions have been identified in this white paper, along with a comprehensive analysis of the technical feasibility and business availability of those fundamental technologies. A radical industry transition towards the "economy of information through softwarization" is expected in the near future.
A Substitution Network (SN) is a rapidly deployable temporary wireless network that should be dyn... more A Substitution Network (SN) is a rapidly deployable temporary wireless network that should be dynamically integrated within an existing base network. They back-up the base network inorder to meet temporary network overloaded conditions to keep providing services and to ensure the network connectivity, which could not be achieved by the base network alone. Within this context, in this paper, we propose a solution considering SNs as a means for provisioning backup path for Mobile Network Operators (MNOs) microwave backhaul to overcome network overload due to excessive wireless data traffic. Our approach considers Software Defined Networking (SDN) technology due to its flexibility to integrate diverse future generations of switches as well as its centralized approach for decoupling control-plane and data-plane. Our solution is based on exploring the OpenFlow protocol. Based on our experimental results, we demonstrate the feasibility of our proposal, which allows verifying the effectiveness of adopting SNs based on SDN. Here, our approach is considered in the context of emerging economies, since, from past research, studies have shown that OPEX/CAPEX may not have the same impact in emerging countries as they have in developed countries.
IEEE Transactions on Network and Service Management, 2016
Predictive distribution of calls between inquiry centers
The paper presents various options of routing architectures for Asynchronous Transfer Mode networ... more The paper presents various options of routing architectures for Asynchronous Transfer Mode networks based on currently developed User/Network Interface (UNI) protocols. The band-width reallocation, routing updating, and call connection levels are distinguished. Functions of corresponding procedures are defined with respect to traffic performance requirements and related to the ATM protocol layers. An architecture of the ATM node is briefly discussed.
Parameter Estimation in Large Scale Systems
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Papers by Prosper Chemouil