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In this paper we describe an LTE based demonstrator of the Universal Link Layer API (ULLA) and Cognitive Resource Manager (CRM) modules that are developed in ARAGORN project. The demonstrated LTE system comprises one LTE TDD eNode B and one User Equipment (UE). We first introduce ULLA and CRM framework and then demonstrate their suitability to be implemented with the existing LTE equipments. We show...
In this paper, a new joint scheduling and hybrid resource allocation method is derived and investigated for a multi-user downlink Orthogonal Frequency Division Multiple Access (OFDMA) system that provides Time Delay-Sensitive services (TDS) and Time Delay-Insensitive services (TDI). A three sectored multi-cellular heterogeneous traffic environment is considered where users are randomly distributed...
The problem of dynamic Quality of Service (QoS) management for multimedia services has been addressed from two complementary, yet interrelated directions; one mainly dealing with designing adaptive or “elastic” services, and the other, dealing with “smarter” resource allocation. We adopt this approach in this paper, by performing a graceful quality degradation and the corresponding resource (re)allocation...
Most broadband access networks such as passive optical networks (PONs) adopt the point-to-multipoint (P2MP) topology. One critical issue in such networks is the upstream resource management and allocation mechanism. Nonlinear predictor-based dynamic resource allocation (NLPDRA) schemes for improving the P2MP network upstream transmission efficiency have been investigated in an ad hoc manner. In this...
We consider the problem of allocating a large number of independent, equal-sized tasks to a heterogeneous large scale computing platform. We model the platform using a set of servers (masters) that initially hold (or generate) the tasks to be processed by a set of clients (slaves). All resources have different speeds of communication and computation and we model contentions using the bounded multi-port...
In this paper, we propose a framework to enhance user perceived quality in a multihomed terminal. Based on the observed media independent handover parameters from all the interfaces, the terminal is made aware of the performance of the different access networks and it can intelligently select the interface to send out the data packets. Several schemes, for the purpose of load balancing, are defined...
Free-riding phenomenon is overwhelming in nowadays P2P network which causes researchers to investigate and develop many approaches to combat it. However, almost all the studies neglect the role of relative contribution of peers, namely willingness of contribution (WoC) in our paper. The ignorant to the ratio of peer's actually contribution to its physical capability would undoubtedly lead to unfairly...
In network on chip (NoC), the traditional routing schemes are routing the network through a single path or multiple paths from one source node to a destination node, which will minimize the congestion in the routing architecture. Though these routing algorithms are moderately efficient, but time dependent. To reduce overall data packet transmission time in the network, we consider a network with multiple...
We consider a wireless downlink network with a single base-station, N mobile users and L shared on-off channels. Each mobile user receives a downlink traffic flow from the base-station where a separate queue is maintained for each flow. In this multi-channel downlink network, throughput-optimal scheduling algorithms such as the MaxWeight scheduling require the complete channel state information (i...
Active networks provide a programmable user-network interface that supports dynamic modification of the networkpsilas behavior. Network nodes, in addition to forwarding packets, perform customized computation on the messages flowing through them. Individual packets carry executable code, or references to executable code. Resources in an active network mainly comprise of CPU and bandwidth. The inherent...
Leveraging DHTs (distributed hash table), we propose a novel architecture, which applies multiple query optimization technique to efficiently aggregate queries in large scale distributed networks. We target applications that continuously query the data sources and manipulate a large amount of query results. Our goal is to implement system components to aggregate distributed queries in the network,...
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