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In service-oriented system, by using service selection methods, service entities can be dynamically bound to abstract services. Major of current system have assumed that candidate services are independent of each other. However, recent research has discovered that services do have correlations which will impact Quality-of-Service (QoS) of the composition service [9]. This paper outlines the service-correlation-aware...
Networks-on-chip for future many-core processor platforms face an increasing diversity of traffic requirements, ranging from streaming traffic with real-time requirements to bursty latency-sensitive best-effort traffic from general-purpose processors with caches. In this paper, we propose Back Suction, a novel flow-control scheme to implement quality-of-service. Traffic with service guarantees is...
Deploying femtocell networks embedded in the Macrocell coverage greatly benefits communication quality in variety manners. However, the lack of schemes to effectively mitigate detractive interference, fully utilize radio resources and provide quality-of-service (QoS) guarantee (in terms of delay) creates challenges to practically facilitate the concept of femtocell. To tackle these challenges to achieve...
One of the advantages of relaying is that it offers the potential for a reduction the power required to achieve a specified level of quality-of-service (QoS). However, the problem of optimizing the available resources so as to minimize this power is often difficult to solve. In this paper we consider the case of a point-to-point link assisted by an orthogonal non-regenerative decode-and-forward (NDF)...
Networks-on-chips (NoC) have been introduced as a remedy for the growing problems of current interconnection VLSI chips. Being a relatively new domain in research, simulation tools for NoC are scarce. To fill the gap, we use network simulator NS-2 for simulating multi protocol label switching in NoC, especially at high level chip design. The huge library of network elements with its flexibility to...
In this paper, we discuss the difficulties Reserved Bandwidth Mechanisms for networks-on-chip by MPLS packet-forwarding technologies. Then, we compare these mechanisms in Network-On-Chip that is based on applying the well-known MPLS technology of large-scale computer networks to the on-chip environment. The NS-2 network simulator is used to evaluate the concept for a typical communications scenario...
A quality-of-service (QoS) aware, bi-directional channel NoC (BiNoC) architecture is proposed to support guarantee-service (GS) traffic while reducing packet delivery latency. By incorporating dynamically self-reconfigured bidirectional communication channels between adjacent routers, BiNoC architecture promises more flexibility for various traffic flow patterns. A novel inter-router communication...
Femtocell is attracting an increasing interest in the telecommunication sectors. In this paper, we study the efficient resource allocation in femtocell networks with completed closed access method. The interaction between a macrocell and its underlying femtocells is identified, characterized, and qualified. The study answers the fundamental question in the femtocell networks: how to allocate spectrum...
Recently, multi-paths solutions have been proposed to improve the quality-of-service (QoS) in communication networks (CNs). This paper addresses the problem to obtain the λ-edge-disjoint-path-set (λ DP/B) with maximum bandwidth (λ DPB), for λ≥1. λDP/B is useful for applications that require maximum bandwidth for data transmission, such as video conferencing, video-on-demand, large file downloads and...
With wide adoption of chip multiprocessors (CMPs) in modern computers, there is an increasing demand for large capacity main memory systems. The emerging PCM (Phase Change Memory) technology has unique power and scalability advantages and is regarded as a promising candidate among new memory technologies. When scheduling a mix of applications of different priority levels, it is often important to...
Cognitive Radio (CR) has been recently proposed as a method of alleviating the shortage of radio spectrum, by increasing the efficiency of spectrum use. However, as large portions of spectrum remain under long-term licenses, the economic welfare of the primary license holders must be taken into account, when considering methods of spectrum access that may degrade license holder Quality-of-Service...
Video conferencing typically involves multiple parties who communicate over the Internet by exchanging real-time video and audio messages. The problem about Internet based real-time communication is the best effort behavior which sometimes causes erroneous transmissions that frustrate the conferencing parties. To avoid erroneous transmissions, Quality-of-Service aware video conferencing systems dynamically...
We propose a new channel rate and queue state adaptive time resource allocation heuristic for the base stations in a multiuser wireless access scenario. Motivation of the scheme is derived through the effective capacity concept. Our proposed strategy accounts for fairness and quality-of-service (QoS) of the system on per frame basis. Our results show that the proposed scheme benefits the users with...
Real-time video and Quality-of-Service aspects play an increasing role in the development of medical imaging systems. To avoid resource overload and to guarantee the throughput of dynamic applications, we present a method for complexity prediction of image registration and motion-compensation algorithms, which can have a highly dynamic nature at runtime. As a case study, we explore a medical imaging...
This paper investigates resource allocation and scheduling schemes based on utility theory in a multiuser OFDM home power line communication (PLC) network since utility can evaluate network performance in terms of the level of users' satisfaction from network resource provision. The proposed cross-layer scheme consists of two phases: subcarrier allocation at the physical (PHY) layer and scheduling...
With the proliferation of wireless technologies and the convenience they offer, transporting Quality-of-Service (QoS) demanding traffic such as compressed video over wireless links becomes a trend and a challenging issue. Among many factors, Media Access Control (MAC) protocols play an important role in the network stack to ensure the QoS provisioning for multimedia applications and the efficient...
Peer-to-peer (P2P) VoIP calls such as those provided by Skype have been becoming popular due to their quality-of-service, free of cost, security and convenience. Skype is a distributed P2P network with no centralized call servers. Calls traverse through a myriad of possible paths before reaching to the destination and each packet is encrypted with 256 bit AES encryption. In this paper, we are particularly...
Optimal source precoding matrix and relay amplifying matrices have been developed in recent works for linear non-regenerative multiple-input multiple-output (MIMO) relay communication systems. All these works require the channel state information (CSI) knowledge in order to perform the optimization. However, in practical relay systems, the CSI is unknown and has to be estimated. There is always mismatch...
We propose a combination of Fat-Tree topology and Bisection routing in MPLS network-on-chip which can increase Communication load and quality of service which is suitable for multimedia applications. We compare the performance of IP and MPLS Fat-Tree-based Network-on-chips. The simulations of the architectures are done with two-dimensional Fat-Tree topologies that used MPLS base recovery mechanism...
As CMOS technology scales down into the deep submicron (DSM) domain, devices and interconnects are subject to new types of malfunctions and failures that are harder to predict and avoid with the current system-on-chip (SoC) design methodologies. In this paper we compare four reconfigurable fault recovery mechanism and path restoration schemes, namely, Haskin, Makam, Simple Dynamic and Shortest Dynamic...
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