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In this paper, we propose the network traffic mitigation method using TCP signalling delay algorithm. By using proposed method, the TCP signalling response time is adjusted according to network traffic load status. Through the queuing analysis, we verify that the network traffic load can be mitigated.
Energy awareness is the single most prominent factor of design in all the layers of the protocol stack for wireless sensor networks. A dynamic back-off procedure in which the size of the contention window is influenced by the real time traffic information of the network can be a good remedy to decrease the idle listening time in low loads and the probability of collisions in high loads. In this paper...
In this paper, we propose a minimum transmission energy consumption (MTEC) routing protocol that reduces energy consumption and prolongs network lifetime in user-centric wireless networks. MTEC is proposed for selecting the minimum transmission energy consumption path for data transmission based on the proportion of successful data transmissions, the number of channel events, the remaining node energy...
Call admission control (CAC) functionality is a critical requirement for guarantee the desired quality of service (QoS) for voice calls in IP-based wireless networks. In this paper, three different CAC strategies for voice over IP (VoIP) traffic over wireless access networks with packet buffering are mathematically analyzed through a joint call and packet level discrete time teletraffic model. The...
High packet network have become an essential in modern multimedia communication. Shared buffer is commonly used to utilize the buffer in the switch. In this paper, we analyse the performance of shared buffer with different memory sizes. The architecture of the multi-class shared buffer is developed for 16×16 ports switch that is targeted in Xilinx FPGA. The performance of the multi-class shared buffer...
In this paper, we present an Multi-Dimensional Learning multiple access control scheme for cognitive radio users in unlicensed spectrum. The proposed scheme is developed by applying reinforcement learning to the perspectives of both channel assignment and retransmission policy based upon a multichannel p-persistent CSMA algorithm. In a distributed open spectrum sharing situation, decisions regarding...
Recently, vehicular delay-tolerant networks (VDTNs) were proposed as a new network architecture for sparse vehicular networks. VDTN architecture adopts the DTN store-carry-and-forward paradigm. At the edge of the network, terminal nodes provide internetworking on heterogeneous networks. In VDTNs, datagrams are assembled in large data packets, called bundles. At the ingress edge node of VDTNs, bundle...
The properties of underwater acoustic channel are quite different from those of terrestrial wireless sensor networks, which brings many challenges to design an efficient media access control (MAC) protocol for underwater acoustic sensor networks (UWASNs). In order to overcome the long propagation delay and the funneling effect of UWASNs, a MAC protocol, named path-oriented code assignment (POCA) CDMA...
A Module Matched First Dispatching (MMFD) algorithm for MSM Clos-network switches is proposed in this paper. Each output port of input modules and central modules has its own state pointer. At the beginning of each time slot, schedulers configure the state of each central module according to the value of each pointer. And then, cells switched in next time slot are selected on the basis of the configuration...
In order to carry out the purpose of transit signal priority, by giving priority to transit, while not increasing negative impact on social vehicles, and improving operability, efficiency and effectiveness of the strategy, a rule-based multi-constraint transit signal priority control strategy is designed. The strategy consists of seven constraints, in order to solve conflicts between constraints maximum...
Cognitive networks embody a sense of dynamic responsiveness as actions are typically taken in response to changing circumstances and changing resource availability, which use prior and current knowledge gained from the network to take actions with respect to the end-to-end goals of the whole network. According to the cognitive network framework, a multi-path routing algorithm based on traffic prediction...
In this paper we introduce a new network coding-based network protection strategies against link failure, which is based on prediction of data traffic. In the situation that extra backup links are not applicable, we assign protection packets to the path which would have a low traffic by the prediction. The simulation result shows that using the new strategy, the average queuing delay of packets can...
Medium access control (MAC) protocol plays a crucial role in energy-efficiency, latency reduction and throughput for sensor networks. However, it is nontrivial to achieve good performance in different facets of metrics at the same time. In this paper, we present the performance of an Adaptive Scheduling MAC (AS-MAC) protocol with different Adaptive Scheduling period (AS-period) in multi-hop networks...
This paper describes the challenges of frequency channel selection for WLANs operating in the TV White Space (TVWS) and proposes a dynamic frequency selection (DFS) technique as a solution. Based on the statistics gained from past usage experience of channels, of the TVWS channels' vacancies and channel occupation by the adjacent WLANs, each WLAN evaluates and prioritize the channels independently...
In this paper, we consider a multi-antenna technique employed in cognitive radio networks for interference cancellation. A secondary user is equipped with a multi-antenna which will direct its available power in a direction that the interference to the primary user will be canceled. With this technique, the secondary user could transmit at anytime without generating harmful interference to the primary...
Low Earth Orbit (LEO) satellite networks are expected to provide a variety of multimedia applications. In order to satisfy different QoS requirements and optimize utilization of network resources, a novel traffic classification routing algorithm (TCR) is proposed. The key technique of TCR is investigating the traffic classification link-cost metrics (TCM) for different traffic classes, which selects...
We describe here a new burst scheduling algorithm to avoid burst overlapping in the egress router of optical burst switching (OBS) network, and hence to improve the quality of service (QoS) in developing several optical networks to fulfill the increasing demand of Internet facilities. We consider TAG (tell-and-go) protocol where many lightpaths pass in a given link and burst overlap may occur. In...
Integration of different network services into a converged infrastructure is one of the most intensive challenges in the converged network application development area. Huge differences exist regarding several characteristics of data, voice and video content traffics. While data traffic requires error free services, real time applications like interactive video transfer and VoIP distress of the high...
Qos provision is considered as the complex task due to the heterogeneous nature, diverse QoS requirements of emergent different applications. With the advent of high bandwidth 3G/4G technologies, like LTE, LTE-advanced, the necessity of QoS provision becomes even crucial. Uplink scheduling with QoS provision is considered here. The contribution of this work is uplink packet scheduling scheme maintaining...
Congestion control is vital in the streaming of a video sequence or clip, as network traffic varies unpredictably requiring constant adjustment of the transmission rate. Standard TCP-Friendly Rate Control (TFRC) wastes bandwidth and may react to congestion only when packet loss has already occurred. This paper presents a unicast transport protocol named RRB-SIMD for video streaming over the Internet,...
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