This paper analytically studies performance improvement achieved by packet dispersion. Contrary to the previous work on packet dispersion, we consider the tail distribution of queue length and that of packet delay as performance measures, and we model a packet network as multiple parallel queues where the arrival processes from sources are not renewal but highly bursty. To appropriately evaluat...

In a cognitive radio network (CRN), a preempted secondary user (SU) is placed in a call level queue to wait for accessing another free channel. If the availability of channels is transparent to SUs, packets will be generated during their waiting time and the performance of the CRN will be influenced by which way to handle these packets. In this paper, the call level queue is departed into two p...

We consider crossbar switches for switching variable length packets. Analysis of such switches is important in the context of IP switches where the packet interarrival times and packet lengths are drawn from continuous distributions. Assuming a single stage M N switch we obtain a very general throughput delay model for Poisson packet arrivals and exponential service times. We then analyze an M ...

usually in the form of parallel processing with parallel multi-processor systems are designed .for this reason irregular flow may occur with packages. when you're tired and it all comes out in his np (network processors)  system, reset depending on network performance is negatively affected and we delayed to do this, the design of processors working in parallel packet transmission by avoid...

Fixed length switching (FLS) and variable length switching (VLS) are two main types of switching architecture in high-speed input-queued switches. FLS is based on a cell-by-cell scheduling algorithm, while VLS operates on the variable packet granularity. This paper aims to make a comprehensive comparison between these two switching modes to guide the industrial design and academic research. We ...

This paper studies the Ant-based packet contention resolution schemes for the singlestage shared FDL optical packet switches. A new Ant-based algorithm is proposed, namely delaybased FDL assignment and number–delay-based FDL assignment. The proposed algorithm can makes FDLs and output port reservation so as to improve the cell-loss rate under various traffic loads. The proposed contention resol...

We present an upper bound on the error probability achievable using variable-length stop feedback (VLSF) codes, for a fixed size of information payload and given constraint maximum latency average service time. Differently from proposed in Polyanskiy et al. (2011), which pertains to scenario signal is sent over noiseless channel, our applies practically relevant setup link noisy. Numerical eval...

This paper considers the problem of sensory data scheduling of multiple processes. There are n independent linear time-invariant processes and a remote estimator monitoring all the processes. Each process is measured by a sensor, which sends its local state estimate to the remote estimator. The sizes of the packets are different due to different dimensions of each process, and thus it may take ...

Wireless Sensor Networks (WSNs) consist of large number of tiny sensor nodes, all of which have sensing capabilities. As sensor nodes are typically powered by nonrenewable batteries, energy efficiency is a critical factor in wireless sensor networks. Sensor nodes want to continue their lives with limited energy. Each of them using its own energy in minumum level and they aims to provide maximum...