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Network bandwidth and server capacity are gradually becoming overloaded due to high demand and rapid evolution of high quality multimedia services over the Internet. Internet Protocol Television (IPTV) is among the multimedia services that demand more of network and server resources, especially with the emergence of Mobile IPTV. It is imperative for service providers to maintain good quality management...
To guarantee the required quality of service and quality of experience in Internet Protocol Television (IPTV), the server must have the required capacity and resources to serve all the clients' requests. One of the most important resources is the bandwidth. The flexibility of IPTV services which provide users to stream multimedia contents at anytime and anywhere they want makes the demand for video-on-demand...
Bandwidth is one of the characteristics that is used to measure network performance. In this paper, we present a Unicast Bandwidth Efficiency Routing Algorithm (UBERA) for mobile devices that are streaming video contents from a video server. The algorithm can adapt to different number of mobile devices with different level of mobility and different location. Routing decisions are based on the availability...
MPLS-Traffic Engineering (MPLS-TE) provides many recovery mechanisms such as rerouting and protection. Existing one-to-one backup and path-based backup schemes are not resource efficient. We propose Common Protection Path (CPP), a novel protection scheme which selects a common protection path for traffic demands having the same ingress and egress routers. CPP also factors in path failure probability...
Cloud computing is a consolidation environment that hosts heterogeneous applications. Currently, clouds use virtualization technologies to provide an isolated execution environment and agile resource provisioning. Furthermore, live migration is widely exploited to achieve energy saving. However, consolidation and live migration can cause resource contention and utilization overhead that influence...
Machine Type Communication (MTC), which allows different devices to communicate without the needs of human to machine interactions, has been developed in recent years. However, MTC possibly resulting in an unexpectedly high collision rate is different from contemporary mobile communication service when it involves a very large number of communication terminals with little traffic requirement. As a...
The character of the input flow changes with an increasing amount of multimedia services. The most common classical stochastic models suppose an exponential distribution of interarrival times, i.e. the Poisson input flow. This paper shows the significant influence of probability distribution functions of interarrival times, such as the exponential, the hyper-exponential and the Erlang's of the order...
This paper analyses the performance of a new routing protocol for vehicular delay-tolerant networks, called GeoSpray. This geographic routing protocol performs a store-carry-and-forward, combining replication and forwarding/ routing decisions based on location information, with explicit delivery acknowledgments to improve network resources utilization. The performance of the proposed routing protocol...
The need for service resilience is leading to a steadily growing number of multi-homed Internet sites. In consequence, this results in a growing demand for utilising multiple Internet accesses simultaneously, in order to improve application payload throughput during normal operation. Multi-path Transport Layer protocol extensions - like Multi-Path TCP (MPTCP) for TCP and Concurrent Multipath Transfer...
Bus Net is a kind of wireless network which is consist of buses and bus stations. It has the following features: 1) no end-to-end connection between source and destination, 2) intermittent connectivity, 3) high end-to-end delays. However, unlike the other DTNs, the node's mobility in Bus Net is semi-deterministic, which means the node's line is determined but the arriving time is undetermined. With...
Most of Internet traffics are generated by peer-to-peer(P2P) file sharing applications. The main idea of P2P file sharing applications is that when a peer contributes a file with higher rate, the rate that the peer is able to download files from other peers will also be high. The mechanism works well in a bandwidth symmetric network. However, when a peer shares a large amount of files to other peers...
Up to now, the most concurrent multi-path transport (CMT) schemes mainly aim at the issues caused by forward transmission like data reordering at receiver side and neglect the studies on impact of reverse paths' transmission delays. This paper proposes a SACK scheduling mechanism for the CMT schemes to accelerate data transmission in multi-homing environment, in this scheme, the most SACK chunks will...
Space information networks promise encouraging prospects in areas of detection, communication and location. In this paper, node and link evaluation algorithms are proposed to provide reconfiguration basis for such networks. Given that space information networks operate in multi-application environments and offer diverse services, we take connectivity and availability into comprehensive consideration...
Processor cores in a chip multiprocessor (CMP) typically share a large last-level cache and the off-chip memory bandwidth. Previous studies demonstrate that explicit cache capacity and off-chip bandwidth partitioning can yield better overall system performance than without partitioning. However, little work has been done to study the interaction between cache capacity partitioning and off-chip bandwidth...
Packet scheduling is key to QoS capabilities of broadband wired and wireless networks. In a heterogeneous traffic environment, a comprehensive QoS packet scheduler must strike a balance between flow fairness and access delay. Many advanced packet scheduling solutions have targeted fair bandwidth allocation while protecting delay-constrained traffic by adding priority queue(s) on top of a fair bandwidth...
Cooperative wireless networks supporting multiple services necessitate the application of a robust bandwidth allocation policy to ensure Quality of Service (QoS) provision to different applications. In this work, a load dependent bandwidth allocation technique is presented considering traffic priority and buffer load in the relay nodes of a cooperative communication network. An analytical approach...
IEEE 802.16 mesh mode is positioned to be used as a wireless backbone network. In coordinated distributed scheduling (C-DSCH), when nodes transmit control messages to compete for channel access, they need to wait for some period of time called hold-off time to compete again. Network performance is sharply affected by the hold-off mechanism in the bandwidth reservation procedure. In this paper, a new...
The paper presents the effect of traffic interval on the buffering in Go-Back-2 network. The paper represents behavior of Go-Back-2 network when different traffic intervals are used with different buffering capacities. The simulation is done and results are produced in the NS2 simulator. It is concluded that the increase in the traffic interval increases buffer size otherwise it degrades the performance...
The paper presents the comparative study and analysis of buffering in Goback2 network. The performance at the destination node by applying different buffering capacities at the routers is demonstrated. The results using NS2 simulator are produced. It can be concluded that the selection of appropriate type of buffering helps in controlling the congestion and the packet drops at the link node.
This paper proposes a simple path diversity algorithm (SPDA) for Interdomain routing. The SPDA uses source routing to find an alternate path from a source to a destination, and allows flexible division of traffic over the best and alternate path. The SPDA comprises three steps. First, the BGP protocol is extended to allow the BGP routing table to save the multiple paths for any destination. Second,...
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