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In this paper, the performance of traffic based adaptive (TBA) and size based adaptive (SBA) backoff algorithms for IEEE 802.11 DCF has been evaluated. TBA backoff algorithm utilizes contention status in the channel for adjusting the backoff algorithm but SBA backoff algorithm assigns different priority levels based on packet size to traffic loads which is involved with best effort and real time traffic...
The problem of the stability of fuzzy systems with interval time-varying delay is addressed. The time-delay is assumed to belong to a given interval. The systems are approximated by Takagi-Sugeno(T-S)fuzzy models with interval time-varying delay. A Lyapunov-Krasovskii functional, which is based on both the lower and upper bounds of interval time-varying delay, is proposed to derive a less conservative...
Network-in-the-loop is the direction that the military training simulation is advancing forward. Dynamic networking modeling is the key issue for constructing the network-in-the-loop training simulation. For this purpose, the fundamental architecture for the network-in-the-loop training simulation was analyzed and presented. Several features of dynamic networking modeling were researched. Based on...
One of the main parts of peer-to-peer multicast is the structure of overlay network. Most of the existing works utilize some common parameters for constructing overlay tree. These parameters are bandwidth and delay. The mismatch between current overlay structure and underlying network topology causes severe link stress and then leads to high end to end latency. According to these problems, we propose...
This paper presents a new adaptive and dynamic routing algorithm called AAODV for mobile ad hoc networks inspired by Ant Colony Optimization algorithms. This algorithm is proposed by maintaining the nature of the Ad hoc On-demand Distance Vector (AODV) routing through the use of Ant Colony Optimization. AAODV maintains the on-demand nature of AODV but works in an adaptive manner. It does not send...
Simply, internet telephony is telephone network using internet as its communication media. The specific character of a telephone is its ability to make connection to the destination telephone number. So that the right term is actually internet telephony than VoIP which is more aimed to voice communication via internet, so there is no emphasizing on the ability of call directed to the destination phone...
In this study, we showed that switches that incorporate shared buffer switching elements (SE) provide high buffer utilization and needs least amount of buffer space. One of the main factors that affect the buffering strategy is the buffer management approach. In order to manage the incoming packets in each buffered switching element, two buffer handling techniques are proposed: the first-in-first-out...
To deliver media streaming applications efficiently, researchers have developed three practical mechanisms, each of which has its virtues and limitations: Infrastructure-based CDN, Proxy-based approaches and P2P Systems. To address some of the above system limitations we present an enhanced media streaming design. Our design organizes its network entities in a structured P2P manner to provide a large...
This paper concerns with robust stability criteria of networked control systems (NCSs) with the effects of both the time-varying network-induced delay and data packet dropout taken into consideration. A less conservative delay-dependent stability condition is formulated in the form of a linear matrix inequality based on a Lyapunov-Krasovskii functional. No slack matrix variables are introduced and...
A new paradigm full-connect dynamic networks on chip (FC-DYNOC), which supports the communication among modules dynamically placed on a reconfigurable device at runtime is presented in this paper. Based on the cluster theory, this structure increased the number of connections between router and process element, and the PE has the ability to select the source and the destination router for transmitting...
It is important to design on-chip crossbar by using appropriate traffic model. A kind of ??4-high-1-low?? traffic model is presented based on analysis of the character of unbalanced traffic among input port and output port of on-chip crossbar in 2D-Mesh NOC. Then it is analyzed how the performance of on-chip crossbar is impacted by ??4-high-1-low?? traffic model according to simulation. The impact...
Wavelet FIR filter architecture using pipelined addition reordering (PAR) technique is designed and presented in this paper. The average adder cost and computation time for the proposed PAR algorithm is compared with other existing graphical algorithms. Experimental results show that PAR algorithm reduces the hardware cost by 14% compared to RAG-n (reduced adder graph) and 17% compared to BHM (modified...
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