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Virtual Content Aware Networks (VCAN) constructed as overlays over IP network substrate is considered an efficient solution to incrementally introduce content awareness at network level. Planning, mapping on top of multiple domains IP network and optimizing these VCANs is still an open research issue. This paper is focused on intradomain planning and VCAN mapping, with QoS guarantees, thus continuing...
The widespread use of heterogeneous wireless network technologies and their integration with multi-mode terminals enable users to be associated to the best available networks according to user preferences and application specific requirements. We study a user-centric quality of experience based resource allocation problem with several operators, several types of users and different classes of services...
Mobile networks are being evolved from 3.5G to 3.9G/4G, integrated into IP core network based on IMS (IP Multimedia Sub-system). In this environment, it is essential to provide sufficient QoS(Quality of Service) mechanism which enables different services to provide enhanced user satisfaction. In this paper, we propose a new QoS mechanism providing adaptive resource allocation based on each user's...
With the evolution of the IP Multimedia Subsystem (IMS), service interaction and management has received an increasing amount of attention. Service Capability Interaction Management (SCIM) is introduced as a component of Service Delivery Platform (SDP) for providing service interaction of IMS. Although there is much work on the standardization of SCIM, architectures based on industry standards like...
HSPA (High Speed Packet Access) technologies have become an attractive solution for broadband wireless Internet access. This article evaluates the quality of service experimented by one HSPA user in the presence of multiple terminals sharing the cell capacity. The study focuses on Web traffic and includes analytical and simulation results, providing a basis for dimensioning and admission control in...
Mobile radio networks of the IMT-Advanced systems family promise ubiquitous broadband access and high area coverage, with rates of several 100 MBit/s. They claim to guarantee QoS support in terms of low delay and guaranteed throughput. However, with the availability of flat rate plans and bandwidth-hungry applications of future mobile devices the systems are facing a hard challenge in satisfying all...
To enable ubiquitous end-to-end quality of service over IP networks expanding to rural areas, we examine resource allocation problems of a MAC layer for an OFDM MIMO wireless base station (BS) using multiuser beamforming. We compare two linear beamforming techniques, zero-forcing (ZF-BF) and minimum mean square error (MMSE-BF). To guarantee minimum bandwidth and low packet delay in an environment...
The dominant IP traffic is moving from Web to peer-to-peer (P2P) these days. As a result, elephant flows consume bandwidth and unfairness in resources allocation occurs. The main packet-scheduling mechanism currently employed is first-in first-out (FIFO) where the available bandwidth of short flows is limited by elephant flows. Least attained service (LAS), which decides transfer priority of packets...
New architectures have recently been proposed and deployed to support end-to-end advance reservation of network resources. These architectures rely on the use a centralized scheduler, which may be unpractical in large or administratively heterogeneous networks. In this work, we explore and demonstrate the feasibility of implementing distributed solutions for advance reservation. We introduce a new...
In this paper, we consider hybrid circuit/packet networks. A hybrid circuit/packet network consists of a circuit network co-existing with a packet network; generally the packet network is embedded on top of the circuit network. However, in certain cases such as the DOE energy sciences network (ESnet), the circuit network and the packet network are deployed side-by-side (e.g. they have common end-node...
In this paper we describe the design principles and the preliminary implementation of a situation aware intra-domain routing solution, called Situation Aware Multipath (SAMP) routing algorithm. This offers an effective method to increase throughput and to achieve load balancing by attempting to prevent congestion in computer networks. The path selection is based on statistical cross-layer Quality...
We envision that future field-programmable gate arrays (FPGAs) will use a hardwired network on chip (HWNoC) as a unified interconnect for functional communications (data and control) as well as configuration (bitstream for soft IPs). In this paper we present a 3-tier reconfiguration model that uses the HWNoC as the underlying platform to realize dynamic loading, starting, and stopping of applications...
Owing to the heterogeneity and high degree of connectivity of various networks, there likely exist multiple available paths between a source and a destination. To be able to simultaneously and efficiently use such parallel paths, it is essential to facilitate high quality network services at high speeds. So, traffic splitting, having a significant impact on quality of services (QoS), is an important...
A technical prerequisite for a converged network is a common service delivery platform that is independent from the access networks below. The 3GPP SIP-based IP multimedia subsystem (IMS) is defined for this purpose. By specification, IMS is the first implementation towards reaching converged communications which allows users to communicate with video, audio and multimedia content, via any fixed,...
In cryptographically-partitioned networks, data within a packet can be used by routers in the plain-text enclaves to make quality of service (QoS) and precedence and preemption (P&P) decisions in regards to forwarding the packet and allocating resources for flows. However, while in a cipher-text shared transit network, the packet is encrypted and is opaque to routers in the transit network and...
Efficiency and fairness are main objectives in any system design and many choices in life are made based on their tradeoffs. In this paper we introduce a framework for the evaluation of efficiency-fairness tradeoffs that would provide a sound basis for network providers and social planners to provide or plan for an equitable access to the Internet to a diversity of users with different needs and financial...
A technical prerequisite for a converged network is a common service delivery platform that is independent from the access networks. The 3GPP SIP-based IP Multimedia Subsystem is defined for this purpose. On the other hand, Internet Protocol-based television (IPTV) is defined as multimedia services such as television/ video/ audio/ text/ graphics/ data delivered over IP-based networks to provide the...
Recently there has been a renewed interest on mobile communications via satellite. Therefore, the DVB-S2/-RCS standard has been updated with some countermeasures to combat fading effects of the mobile scenario. The focus of this paper is on multimedia traffic management on the DVB-S2 forward link to collective terminals on trains. In our study, we consider ACM, PHY margins, and LL-FEC coding to counteract...
In Proxy Mobile IPv6 (PMIPv6), a new entity called Mobile Access Gateway (MAG) performs the mobility-related signaling with Local Mobility Anchor (LMA) on behalf of MNs (Mobile Nodes). However, a number of MNs must be associated with a MAG and hence, the MAG can be easily overloaded. Thus, in this paper, we propose a load balancing mechanism for the PMIPv6 network. We also discuss about using IEEE...
Session-based QoS control mechanism is a key characteristic in next generation networks (NGN). However, the session-based QoS control defined in NGN standardizations is not designed for layer 2 infrastructures, but for border gateway function (BGF) at IP edge. To achieve QoS assurance for NGN services, end-to-end network resource management, including layer 2 access and metro networks, is required...
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