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In this paper we model the traffic of new and handoff calls in a single cell of wireless mobile networks by a finite buffer queueing system with two types of service classes and a so-called hysteresis multi-threshold based control policy. We describe the behavior of the system in term of a three-dimensional continuous-time Markov process (CTMP) and derive the steady-state distribution of the CTMP...
We describe an improved version of simple polling protocol employed in a wireless sensor network proposed. Although this simple wireless sensor network works efficiently, it is very limited in computing capability. Simple polling protocol works well in situation where every sensor node shares heavy traffic. However, when a few sensor nodes contribute to the traffic, most of the time slots allocated...
In this research, the performance evaluation of two class priority Delta Multistage Interconnection Networks (MINs) is analyzed, using a discrete priority queuing model. All Delta Networks are constructed by special switching elements (SEs) based on an architecture which natively supports two classes of routing traffic. The proposed analytical method which was developed for performance metrics investigation...
The major wireless operators are actively migrating their networks from circuit switched networks to all packet (IP) based next generation networks. One of the key issues impeding the migration is the associated cost. Though managing the CAPEX (CAPital EXpenditures) and OPEX (OPerational EXpenditure) has been the focus of the operators, minimizing the cost from the perspective of system design has...
In distributed real-time systems, most of the end-to-end delay fluctuations, especially the delay fluctuations in the network, are bounded provided that the global network traffic loads are manually controlled to be light-weighted. This paper introduces a simple clock synchronization method in distributed real-time systems by using the traffic smoothing technique which is implemented at each end node...
Queueing systems with cyclic service have a broad range of applications in communication systems, e.g., in switching systems, ring networks, burst assembly in OBS and traffic aggregation in edge nodes. While such systems have been extensively studied, the buffer capacity is often assumed to be unlimited. In real systems, queue sizes are always limited. We present an analytical method using state-space...
Cyclic service queueing systems have a broad range of applications in communication systems. From legacy systems like the slotted ring networks and switching systems, to more recent systems like optical burst assembly, Ethernet over SDH/SONET mapping and traffic aggregation at the edge nodes, all may employ cyclic service as a means of providing fairness to incoming traffic. This would require the...
The research community is interested in finding effective methods to detect network traffic anomalies such as the propagation of a new worm, and to raise alarm in time. In this paper we research the principle that the number of network traffic can affect self-similarity of network traffics, and analyze the variety of self-similarity caused by abnormal network traffic. We propose a network traffic...
The increase of the web traffic has created the need for web switches that are able to balance the traffic to the server farms based on their contents (e.g. layer 7 switching). In this paper we present a web switch implemented in a multiprocessor reconfigurable platform augmented with hardware co-processors. The system supports the TCP splicing scheme to accelerate the routing of the packets by forwarding...
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