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In this paper, we have estimated new call block and handoff call drop performances in Cellular WiMAX. Call Admission Control (CAC) is the process of regulating voice communication, particularly in wireless mobile networks. Further it is a fundamental mechanism used for QoS provisioning in a network. It restricts the access to the network based on resource availability in order to prevent network congestion...
Quality-of-Service (QoS) is a fundamental part of Networks-on-Chip (NoC) design. In application specific NoCs, guaranteed QoS is often obtained by static bandwidth reservation at design-time. The bandwidth allocation inevitably affects power-efficiency, which is crucial yet largely neglected in prior NoC QoS methods. In this work, we develop two algorithmic techniques that concurrently address power-efficiency...
The rapid growth of supercomputing systems, both in scale and complexity, has been accompanied by degradation in system efficiencies. The sheer abundance of resources including millions of cores, vast amounts of physical memory and high-bandwidth networks are heavily under-utilized. This happens when the resources are time-shared amongst parallel applications that are scheduled to run on a subset...
Current high-performance capacity systems run hundreds of applications concurrently sharing the same network resources. In this scenario, system throughput and hence system utilization is significantly affected by inter-application contention. Quality-of-service (QoS) mechanisms are traditionally used in the Internet to provide different levels of performance guarantees. However, we have not found...
Optimum network resource utilization and network resource pooling to deal with network congestion in present time is one of the biggest challenges faced by various research, development and monitoring network groups or organisations. IETF research group has proposed various solutions to improve the Quality of Service (QoS) of internet communication. Routing solutions with effective operations can...
With the recent development in silicon photonics, researchers have developed optical network-on-chip (NoC) architectures that achieve both low latency and low power, which are beneficial for future large scale chip-multiprocessors (CMPs). However, none of the existing optical NoC architectures has quality-of-service (QoS) support, which is a desired feature of an efficient interconnection network...
Telemedicine traffic carries critical information with regard to a patients' condition; hence, it requires the highest transmission priority compared with all other types of traffic in the cellular network. The need for expedited errorless transmission of multimedia telemedicine traffic calls for a guaranteed bandwidth to telemedicine users. This condition, however, creates a tradeoff between the...
Advanced SoCs integrate a diverse set of system functions that pose different requirements on the SoC infrastructure. Predictable integration of such SoCs, with guaranteed Quality-of-Service (QoS) for the real-time functions, is becoming increasingly challenging. We present a structured approach to predictable integration based on a combination of architectural principles and associated analysis techniques...
The efficiency of Bit Torrent in disseminating content has inspired a number of P2P protocols for on-demand video streaming (VoD). Prior work on adapting Bit Torrent to VoD mainly focused on the piece selection policy, since streaming requires a somewhat "in order" download progress. Conversely, not much effort has been spent into adapting Bit Torrent's peer selection policy, where nodes...
In information society based on the Internet, demands for high-capacity multimedia services are always increasing. However, it is not possible to offer users satisfactory services, because of lower transmission rate and the limitation of the distance through access networks. In order to solve limitation of transmission rate through access networks and to guarantee Quality-of-Service, it is proposed...
The last ten years have witnessed explosive growth in the number of subscribers for mobile telephony and data services. However, the recent development of mobile broadband technology comes at a significant energy cost. As subscriber levels saturate, the operating costs of such a network need to be reduced significantly to maintain competitiveness. The carbon footprint will become an increasingly important...
The efficiency of BitTorrent for file sharing has inspired a number of BitTorrent-based P2P protocols for Video-on-Demand (VoD). It has been shown that these systems are scalable in steady-state: the service quality provided to the users does not depend on the number of users in the system. However, it is not well understood how these systems scale under flash-crowds. In this work, we model a general...
With the development of innovative network infrastructure and increasing bandwidth availability, live video streaming is emerging as an attractive application for end users and the industry. Due to the heterogeneity in user resources as well as bandwidth fluctuations, we argue that, to provide high quality-of-service, it is desirable to tailor (on-the-fly) the bit rate of video streams, according...
Group multicasting is a kind of communication mechanism whereby each member of a group sends messages to all the other members of the same group. It is more important for group multicast routing algorithms to manage the resources efficiently and satisfy the QoS (Quality-of-Service) requirements of each individual application. In this paper, we proposed two routing algorithms for group multicast with...
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...
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...
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...
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...
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