Over two decades, a problem of location dependent has been focused for improving the communication Bandwidth-Power Efficiency of homogeneous networks. The efficiencies of communication links are weakened by the Hidden Terminal Problem.  Thus we propose a Fine – Tune Strategy for analyzing the On-Off communication region. We were observed that the proposed technique had been able to track and mo...

This paper addresses the UMTS system performance analysis over dedicated channels based on buffer length allocation and dynamic allocation control procedures. Throughput and access delay for packet data transmission is evaluated as a function of network load for both of the allocation procedures. A mathematical model, which can be used to analyze the throughput of UMTS dedicated channel, is pro...

A Mean-Field theory is presented and applied to a Cellular Automata model of distributed packet-switched networks. It is proved that, under a certain set of assumptions, the critical input traffic is inversely proportional to the free packet delay of the model. The applicability of Mean-Field theory in queue length estimation is also investigated. Results of theoretical derivations are compared...

We apply a semiclassical approach to the scattering problem of a vibrational wave packet in the vicinity of a conical intersection of electronic energy surfaces and derive analytical expressions for the scattering matrix. The latter are valid when the scattering length that scales as square root(h) is small and a wave packet passes through the scattering region with a constant velocity. The ana...

This paper assumes each user has more than one queue, derives a new packet-dependant proportional fairness power allocation pattern based on the sum of weight capacity and the packet’s priority in users’ queues, and proposes 4 new cross-layer packet-dependant OFDM scheduling schemes based on proportional fairness for heterogeneous classes of traffic. Scenario 1, scenario 2 and scenario 3 lead r...

Using a new type of ion trap, we demonstrate that the length of a packet of charged particles oscillating between two electrostatic mirrors will remain constant under special conditions. The effect can be understood in terms of phase synchronization, where, in a rather counterintuitive way, the repulsive Coulomb interaction between the ions actually holds the packet together. Application of thi...

In this paper, we propose an adaptive geographic routing protocol, which is composed of two routing protocols. According to the topology of the network, the adaptive geographic routing protocol can select a suitable protocol to route a packet around a hole in the sensor network. Experimental results show that the adaptive geographic routing protocol can route a packet in a suitable path and sho...

In this paper we investigate various performance measures of interest, when comparing fast packetswitched networks that operate with either fixed or variable packet sizes. These performance measures include queue length distribution, packet loss probability, as well as user frame loss probability. The focus of the paper is on identifying key parameters that influence the outcome of this compari...