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Wireless Sensor Networks (WSNs) provide a cost efficient solution for data gathering in future smart environments like smart grids and Advanced Metering Infrastructure (AMI). Using the traditional minimum cost routing, leads to congestions along shortest paths and decreases the network lifetime. Multipath routing and load balancing is a logical way to extend the network lifetime. In this paper we...
Cognitive Network is one of the most prevailing development directions in the future network, prominent in enhancing the utilization of the network resource. Although the research on routing mechanism in Cognitive Network arises more attention in the recent years, the current mechanism provides limited methods for ameliorating the instability performance caused by the mobility of the Cognitive Radio...
A network is very important for fast communication in real life but it is suffered from many problems and one of them is packets loss due to congestion. Congestion Control helps to prevent internet from gridlock state. When a packets switch becomes congested, its buffer can overflow and packets loss can occur. The internet avoids this problem by forcing end system to decrease the rate of sending packets...
Low Extra Delay Background Transport (LEDBAT) congestion control algorithm is designed to address the unfairness problem of TCP aggravated by applications that use multiple TCP connections for data transfer. LEDBAT operates under the assumption that the queue delay at the access router of the bottleneck link will be the primary varying contributor to end-to-end one-way delay. However this assumption...
With the popularization of Internet and formation of wireless technologies provide significant impact on Internet and Communication Technologies. These technologies have support of one of famous technique known as Adhoc Network. Adhoc Networks are assortment of mobile nodes connected by wireless links and also receiving attention in the scientific community. In adhoc networks, routes may be disconnected...
In Vehicular Ad Hoc Network (VANET), the route between a source node and a destination node is intermittently broken. It is difficult to provide the reliable data transfer based on TCP because TCP is not adaptable to such networks such as VANET. Therefore, this paper proposes an end-to-end transfer rate adjustment mechanism in the application layer for VANET. The proposed mechanism consists of three...
In Delay Tolerant Networks (DTN), as disconnections between nodes are frequent, establishing routing path from the source node to the destination node may not be possible. However, if a node transmits packets to all its encounters, its batteries will be used up quickly. Many researches have been done on routing and forwarding algorithms in DTN, but few of them have explicitly address the energy issue...
In view of the development of high speed network and the challenge to congestion control, By deeply researching route buffer and packet loss rate performance for high throughput of N-TCP, which is based on equivalent noise model and bandwidth estimation. Simulation results indicate that N-TCP can get more stable and higher throughput than TCP Reno significantly in the situation of high speed network...
The main concerns of network performance are throughput, end-to-end packet delay and packet loss. A high-performance network is characterized by high throughput, small delay, and low packet loss. A larger transmission radius increases the probability of finding a receiver with large progress, but simultaneously increases the probability of collision with other transmissions. Transmission range and...
Routing protocols for sparse mobile ad hoc networks are becoming important due to applications such as vehicular networks and emergency services. Simulation based performance evaluation of a given protocol is computationally demanding, requiring a significant amount of time and resources. For this reason, analytical approaches to performance evaluation are desirable; however, such approaches are challenging...
For wireless sensor networks (WSN) involved in geographical surveillance type applications, obtaining information from a specified region of interest is important. The information itself is dependent upon the application type specific sensors deployed within the network region. For the purpose of this study we propose a new routing protocol called swarm intelligent odour based routing (SWOB) that...
Along with the reactive routing algorithms of mobile ad hoc network (MANET), preemptive routing is a patch method which tries to warn the source node and to tell it to change route in time before a link is about to break Preemptive method was proposed to decrease packet losses and improve TCP performance in MANET. However, the precision of warning occasion is an important problem, and affects TCP...
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