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...

Link Adaptation is an adaptive radio link technique that selects a transport mode, from a set of predefined modes of varying robustness, depending on the channel quality. One of the parameters that has to be defined when considering the application of Link Adaptation is the updating period which indicates how often a decision is made on the transport mode to use. This paper analyses the Link Ad...

2. Approach We first define a family of very simple basic investment strategies. We wish to guarantee that the performance of our strategy is close to that of any of the the basic strategies that we may consider, which can be achieved by hedging : distributing our starting capital over all basic strategies. Let δ = δ1, δ2, . . . be a sequence of positive reals, then the basic strategy σδ initia...

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216 Abstract—Authentication of mobile subscriber is a challenge of future researchers due to increasing security threats and attacks with the enhanced population of wireless traffic. 3G mobile communication system has been developed to speed up the data communication. In general the authentication technique in 2G mobile communication is solely dependent on checking the authenticity of MS (Mobil...

Optical Packet Switching (OPS) and Optical Burst Switching (OBS) are optical networking concepts based on fully exploiting fast dynamic allocation of (D)WDM channels. Compared to more static approaches focussing on providing end-toend optical channels, OPS and OBS aim at providing greater bandwidth efficiency, granularity and flexibility. In this paper we give an overview of the issues arising ...

In this paper we study the convergence of the max-consensus protocol. Tropical algebra is used to formulate the problem. Necessary and sufficient conditions for convergence of the max-consensus protocol over fixed as well as switching topology networks are given.