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The paper presents the comparative study and analysis of buffering in Goback2 network. The performance at the destination node by applying different buffering capacities at the routers is demonstrated. The results using NS2 simulator are produced. It can be concluded that the selection of appropriate type of buffering helps in controlling the congestion and the packet drops at the link node.
There are two causes of network congestion: one is the lack of network resources, and the other is the irrational allocation of network resources. While traditional congestion control methods such as rate control, window mechanism, queue control, etc. can be applied to solve the congestion problem, but for the later congestion case, the fundamental solution is to make more effectively use of the network...
Delay Tolerant Networks (DTNs) are characterized by intermittent connectivity, high delay and without end-to-end path from the source to the destination. The fundamental way of message routing in DTNs is store-and-forward. Thus, the mal-behaving nodes in the networks, which are uncooperative to relay messages, will significantly undermine the routing performance. In this paper, we propose a novel...
As the high redundancy of network equipments and paths, connection reliability is no longer the most important parameter for networks. According to network function, this paper advances transmission time reliability as a common parameter to describe network congestion. It is defined to be the probability that networks will transmit material, energy or information timely when used under specified operating...
Delay-Tolerant Networks(DTN) are wireless networks where disconnections may occur frequently due to node mobility, power outages and propagation phenomena. In order to achieve data delivery, store-and-forward protocols are used in DTN and routing protocols based on epidemic message dissemination has been proposed, such as Epidemic routing. Under Epidemic routing, packets can be completely delivered...
In this paper, we introduce a novel routing algorithm which is based on ant colony system. The objective of this novel algorithm is to solve the problem of energy and congestion control on wireless sensor network routing process. This novel algorithm is able to achieve better load balance and prolong the network lifetime. In this novel algorithm we combine the pheromone released by multi-ant colonies...
Traffic congestion avoidance is a critical issue associated with data routing in Wireless Sensor Networks (WSNs). Previous researches employ either traffic or resource control strategies as solutions. In this paper, we propose an energy-efficient grid-based traffic congestion avoidance scheme in WSNs, termed as TALONet. With our mechanism, the approaches applied to avoid congestion have three folds:...
This paper proposes an enhanced load-balancing approach considering the on-going traffic sessions as well as new traffic sessions. In our scheme a congested node tries to escape from the congestion caused by the on-going traffic session by requesting phased detour to adjacent nodes. Like legacy load- balancing schemes, a potentially congested node avoids entering congestion state by dropping incoming...
We propose a routing mechanism with distributed call admission control (CAC) algorithms for mobile ad hoc networks (MANET) based on IEEE 802.11e EDCA MAC protocol. A new flow can be admitted by the network only if it can find a path to sustain its traffic. Bloom filter is used here to detect the flows via each node, and the CAC routing decisions are made according to the number of flows of each node...
Call Admission Control (CAC) mechanism can protect the existing flows from being disturbed by the newly added flows, which can ensure the quality of service (QoS) of Mobile Ad hoc Networks (MANET). We proposed a routing mechanism with distributed CAC algorithms for MANET based on IEEE802.11e EDCA MAC protocol. A new flow can be admitted by the network only if it can find a path to sustain its traffic...
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