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Bus Net is a kind of wireless network which is consist of buses and bus stations. It has the following features: 1) no end-to-end connection between source and destination, 2) intermittent connectivity, 3) high end-to-end delays. However, unlike the other DTNs, the node's mobility in Bus Net is semi-deterministic, which means the node's line is determined but the arriving time is undetermined. With...
At present, typical application-specific NoC systems often integrate a number of heterogeneous components which have varied functions, sizes and communication requirements. Instead of regular topology networks, constructing irregular mesh topology network on chip (NoCs) becomes an attractive approach to building future NoC systems with irregular structure. Deadlock-free routing control algorithm is...
Realism and simplicity of virtual experiment scene building can influence the usage of virtual educational experiment applications. This paper proposes an image based method of experiment scene building for Virtual Educational Experiments. Firstly, virtual educational experiment components are extracted from images of experiment instrument by using the interactive method of object extraction. Then,...
This paper presents a routing method that increases the reliability and product yield of Network-on-Chip (NoC) architectures while incurs a negligible cost. This method has a multi-level fault-tolerance capability and therefore it is capable to tolerate more faulty links and routers with extra cost in higher levels. The proposed algorithm uses dynamic reconfiguration to handle permanent faults but...
This paper proposed an improved Chord model called AF-Chord, which is based on the adjusted constructor for Finger Table, and give out its routing algorithm. While constructing the Finger Table, we have considered the using of the redundancy table entries, and provide a improved routing algorithm. Through simulation experiment, we can prove that in the premise of a constant Finger Table capacity,...
According to the topological feature of the power-line network, an improved On Demand Distance Vector (IPODV) routing is proposed to ensure an efficient data transmission. It is based on Ad hoc On-Demand Distance Vector (AODV) Routing which is a powerful routing protocol used in ad-hoc networks to deal with the fast changing logical topology. IPODV improves two modules of conventional AODV: neighbor...
Rumor Routing is one of the query-driven routing algorithm categories in wireless sensor networks which is well extended and optimized in the recent years. Common principal ideas in all rumor routing algorithms are conjunction of query-agents with the traversed path of event information propagator agents in the network. In all rumor routing protocols, Agents conjunct each other in undefined point...
The lifetime of a sensor node depends on its energy consumption. In order to achieve efficient use of the energy and extend the network's lifetime, this paper discusses the routing algorithm, focusing on the algorithm of SPIN. In the light of the problem of “blindly forward” and “data unaccessible” in SPIN, a new routing algorithm called SPIN-I is proposed, and we simulate it from two aspects with...
According to increasing the network traffic in the IMS, the role of Network Management System (NMS) is very important because of limited network resources. It can perform two kinds of routing ways with the capability of static or dynamic routing. A dynamic routing way is more efficient than static routing one because it can make the flow of traffic changeful among nodes in the IMS. Therefore, in this...
A routing mechanism for vehicular ad hoc networks (VANET), which is based on geographic location information, is presented according to its characteristics in urban environment. The algorithm reduces the number of routing hole when delivering packet through marking a section whether or not it is a hole region○ Meanwhile, the node which is located in intersection area combines greedy forwarding with...
3D IC technology enables NoC architectures to offer greater device integration and shorter interlayer interconnects. The primary 3D NoC architectures such as Symmetric 3D Mesh NoC could not exploit the beneficial feature of a negligible inter-layer distance in 3D chips. To cope with this, 3D NoC-Bus Hybrid architecture was proposed which is a hybrid between packet-switched network and a bus. This...
This paper presents performance and reliability evaluation of deterministic and adaptive fault-tolerant routing algorithms used in Network-on-Chip (NoC) designs. The investigated methods have a multi-level fault-tolerance capability and therefore can be separately evaluated. To illustrate the effectiveness of these methods, we conduct appropriate simulations on different applications for performance...
Routing algorithm as a research core in the wireless mesh network, the design is good or bad is very important to network performance. In the field of ant colony optimization (ACO), models of collective intelligence of ants are transformed into useful optimization techniques that find applications in computer networking. Unbalanced traffic may lead to more delay, packet dropping, and decreasing packet...
Sensors in a Wireless Sensor Network (WSN) are prone to failure, due to energy depletion, hardware failures, etc. Fault tolerance is one of the critical issues in WSNs. The existing fault tolerant mechanisms either consume significant extra energy to detect and recover from the failures or need to use additional hardware and software resource. In this paper, we propose a novel energy-aware fault tolerance...
Topology control and energy saving is one of the most important problems in wireless sensor networks because of special property of these networks such as limited transmission range, limited power resource and the impossibility of recharging. To solve this problem, CHRA (clustering hierarchical routing algorithm), a centralized cluster formation algorithm for routing algorithm is proposed. At the...
For the unbalanced energy consumption problem in Directed Diffusion and Energy Aware Directed Diffusion in heterogeneous networks, we propose the EAADD: Energy Aware Adaptive Directed Diffusion for Wireless Sensor Networks. This protocol changes the way of building reinforced path : first,we consider about the correlations of node available energy between adjacent rounds, then we use the adaptive...
Network on chip (NoC) is the most promising on-chip communication architecture. The three dimensional integration of NoC is achieved by stacking 2D layers. The communication between the layers is achieved by the presence of vertical links between the 3D nodes. We propose a deterministic routing scheme for choosing the 3D node and it uses the xy routing within the 2D layers. Our algorithm finds path...
This paper presents a hierarchical model of logistics delivery networks by using some principles in graph theory. Based on the proposed hierarchical model, an optimal solution for dynamically configuring the resources of logistics delivery networks is devised through setting the appropriate value for the weight of edges in the model, which aims at minimizing the total traffic cost of a delivery network...
The regularity of resources found in FPGAs is a unique feature, which can be utilized in a number of applications, e.g., in timing critical applications or applications with a demand for homogeneous routing. Current synthesis tools do not support an automatic generation of homogeneous FPGA designs, such that a time-consuming hand-crafted design is required. We present a tool flow, which automatically...
This paper presents a method to enhance OLSR quality of service. Our approach heavily relies on the binary error rate metric and allows to rise the packet delivery ratio (PDR). We find that two elements of OLSR must be changed, the MPR selection algorithm and the route computation. We show that our approach provides better PDR than the original OLSR algorithm.
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