Specifically, the simulation are run, with the following network topologies: a spars and narrow network topology i. Specifically, the frame duration is 10 ms and the channel bandwidth is 10 MHz According to the standard, only one channel is used to transmit control information, thus the use of multiple channels is not considered. Average frame intervals between two consecutive mesh Demand VOD type; however, they did not have any distributed scheduling messages for chain impact on the transmission in control slots.
The comparison of end-to-end one-way delay between We now define the performance indices that have been the standard and heuristic method is shown in Fig. The considered in order to assess the distributed scheduling chart implies that delay increases with the network procedure performance in new approach. First metric is extension.
It can be observed that the proposed algorithm average interval in slot units between two consecutive has smaller end-to-end one-way delay as a result of mesh distributed scheduling messages sent by a node. Second one is the average end-to-end one-way delay in seconds. The patch program [12] of coordinated distributed mode of IEEE The simulation output analysis is carried out using the method of independent replications.
Specifically, for each scenario a variable number of independent replications are run. The duration of each simulation run varied depending on how the specific system was configured. Chain Figure 3. Average end-to-end one-way delay for chain In order to decrease the number of idle slots and improve the network performance, in this scenario a spars and narrow topology i.
Figure 1. Schematic representation of nodes connection in chain topology To obtain the network performance parameters, six simulations are run with respectively 4, 9, 16, 25, 36, 49 number of network nodes. To be compatible with grid- full, in chain topology, numbers are selected complete Figure 4. Average end-to-end throughput for chain squared. There algorithm is better than basic standard scheduler.
The remarkable point in two recent charts is optimum C. Grid-Full values in grid-full topology with 9 nodes. As it can be Another simulation scenario is using a dense network seen, the lowest delay as well as the highest throughput is topology i. That can be the result connection in a schematic way. Therefore we can say this is the optimum network configuration among studied networks in which the highest value of about bytes per second of throughput and the least delay of about 0.
Figure 5. Scheme of nodes connection in grid-full topology In such networks, every node has more than two neighbors that affect the performance of network transmission scheduling. The simulations with grid-full topology are run with respectively 4, 9, 16, 25, 36, 49 number of network nodes. It can be seen that the frame intervals become smaller in heuristic method Figure 7. Average end-to-end one-way delay for grid-full because the nodes can sooner return to competition situation.
Additionally, the average access interval growth in grid-full topology is more than in chain. The reason is that the average number of competitors of every node at each slot increases because in grid-full there are more neighbors than chain. Figure 8.
Average of end-to-end throughput for grid-full V. Average frame intervals between two consecutive mesh metropolitan area networks, a new approach in IEEE distributed scheduling messages in grid-full As expected, the heuristic algorithm has smaller Simulations with various network configuration and end-to-end one-way delay, caused by reduction of Hold scenarios show that, applying this solution, inefficient use off time due to decreasing the empty control slots.
In of channel is effectively decreased. Guide to Disaster-Resilient Communication Networks. This authoritative volume presents a comprehensive guide to the evaluation and design of networked systems with improved disaster resilience. The text offers enlightening perspectives on issues relating to all major failure scenarios, including natural disasters, disruptions caused by adverse weather conditions, massive technology-related failures, and malicious human activities.
Topics and. However, wireless mesh network has several problems to be solved However, wireless mesh network has several problems to be solved before being deployed as the fundamental network infrastructure for daily use. The book is edited to specify some problems that come from the disadvantages in wireless mesh network and give their solutions with challenges.
The contents of this book consist of two parts: Part I covers the fundamental technical issues in wireless mesh network, and Part II the administrative technical issues in wireless mesh network,. This book can be useful as a reference for researchers, engineers, students and educators who have some backgrounds in computer networks, and who have interest in wireless mesh network.
It is a collective work of excellent contributions by experts in wireless mesh network. By Elisangela S. Aguiar, Billy A. By Geir Egeland, Paal E. You can easily create a free account. Your Web browser is not enabled for JavaScript. Some features of WorldCat will not be available. Create lists, bibliographies and reviews: or. Search WorldCat Find items in libraries near you. Advanced Search Find a Library. Your list has reached the maximum number of items. Please create a new list with a new name; move some items to a new or existing list; or delete some items.
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