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International audienceNetwork Function Visualization (NFV) and Software Defined Network (SDN) currently play a key role to transform the network architecture from hardware-based to software-based. Along with cloud computing, NFV and SDN are moving network functions from dedicated hardware to software implementation (Virtual Network Functions - VNF), on Virtual Machine (VM) or other virtualization technology such as containers, on top of a virtualized platform in the Cloud. To connect the VNFs, hosted in the same Data Center (DC) or across multiple DCs, virtual switches are required. Besides forwarding functions, virtual switches can be configured to mirror traffics for network management needs. Among the existing virtual switch solutions, Open vSwitch (OVS) is the most known and used. OVS is open source, and included in most of the existing Linux distributions. However, OVS performance in terms of throughput for smaller packets is very smaller than of line rate of the interface. To overcome this limitation, OVS was ported to Data Plane Development Kit (DPDK), namely OVDK. The latter achieves an impressive line rate throughput across physical interfaces. In this paper, we present the result of OVDK performance test when flow and port mirroring are activated, which was not tested so far. The performance test focuses on two parameters, throughput and latency in OVDK; allowing to validate the use of OVDK for flow forwarding and network management in the envisioned virtualized network architecture

The World Wide Web has become an important platform for delivering services in the last decade. Openness and flexibility are indeed key factors for the success of the Web where end-users develop applications freely. As a consequence, end-users become producers and consumers of contents and services. End-users rely for their communication needs on communication platforms (CPs). CPs managed by Service Providers lack sufficient openness and flexibility for end users due to their own complexity. This paper examines the CPs from the perspective of openness and flexibility for end-users, and then proposes a novel concept, My Own Communication Service Provider (MOCSP). The key innovation is to provide an individual CP for an end-user for his/her communication services. To achieve this goal, we design a MOCSP system, based on a top-down and user-centric approach. Moreover, we analyse our approach in terms of benefits for end-users.

To support user mobility across different devices, communication session continuity should be enabled at session initiation and during a session. The session continuity can be managed by either a user or dedicated network nodes such as back-to-back user agent (B2BUA) in IP Multimedia Subsystem (IMS) architecture. When network manages the session continuity, user experience is enriched because users do not need to know how to perform session transfer. However, in IMS architecture, three different network nodes (SIP forking proxy, SIP registrar and B2BUA) need to cooperate for session continuity. When single user (callee) logs in from different devices, it is very hard to achieve cooperation. In addition, these network nodes should be scalable when many users request this service simultaneously. This paper proposes a general architecture that supports the user mobility and how the general architecture can be realized into a Web-based communication system. Our initial analytical result shows that the usage of computing resources (e.g. CPU) is reduced while supporting scalability, thanks to the simple Web client service infrastructure and Web Socket connections on top of HTTP.