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Dual Bus R-Net: A new local/metropolitan area network
Title
Dual Bus R-Net: A new local/metropolitan area network.
Creator
Chauhan, Sanjeev Birbal., Florida Atlantic University, Ilyas, Mohammad
Abstract/Description
In this thesis we have proposed and analyzed a new architecture for high speed fiber optic LANs/MANs, called the Dual Bus R-Net. The scheme is based on a slotted unidirectional dual bus structure. It uses a reservation mechanism to generate slotted frames on each bus. Frames consist of a reservation slot and one or many information slots. Stations reserve slots by transmitting reservation requests on the bus carrying information in the opposite direction. The scheme has the advantage of...
Show moreIn this thesis we have proposed and analyzed a new architecture for high speed fiber optic LANs/MANs, called the Dual Bus R-Net. The scheme is based on a slotted unidirectional dual bus structure. It uses a reservation mechanism to generate slotted frames on each bus. Frames consist of a reservation slot and one or many information slots. Stations reserve slots by transmitting reservation requests on the bus carrying information in the opposite direction. The scheme has the advantage of superior channel utilization, bounded delay, fair access to all stations, dynamic bandwidth allocation to network users, and implementation simplicity. Extensive simulations have been carried out to verify the characteristics of the network. Simulation results reinforce the initial claims of the advantages offered by Dual Bus R-Net. Performance analysis is presented in terms of network delay and channel utilization. Simulation results are compared with similar results of X-Net, R-Net, DQDB, and Expressnet.
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Date Issued
1994
PURL
http://purl.flvc.org/fcla/dt/15006
Subject Headings
Local area networks (Computer networks), Metropolitan area networks (Computer networks), Computer network architectures, Computer network protocols
Format
Document (PDF)
Counter-rotating slotted ring: A new metropolitan area network architecture
Title
Counter-rotating slotted ring: A new metropolitan area network architecture.
Creator
Choi, Kwok K., Florida Atlantic University, Ilyas, Mohammad, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
In this dissertation a new architecture, Counter Rotating Slotted Ring (CRSR), is proposed for Metropolitan Area Networks (MANs). MANs are newly developed optical fiber based networks that have high data transmission rates and wide area coverage. They provide voice, video and data services. A CRSR has a dual-ring architecture that consists of two uni-directional transmission media, which are shared among the network nodes. The transmission time in a CRSR is divided into fixed length slots....
Show moreIn this dissertation a new architecture, Counter Rotating Slotted Ring (CRSR), is proposed for Metropolitan Area Networks (MANs). MANs are newly developed optical fiber based networks that have high data transmission rates and wide area coverage. They provide voice, video and data services. A CRSR has a dual-ring architecture that consists of two uni-directional transmission media, which are shared among the network nodes. The transmission time in a CRSR is divided into fixed length slots. These slots are generated by a head station during the system initialization phase. They flow inside the dual-ring in opposite directions: clockwise and counter clockwise. In each slot, there is an Access Control Field, a Segment Header Field and a Segment Payload Field. These fields contain slot control bits, segment identification and data respectively. One of the control bits is used to indicate if a slot has data or not. Once a busy slot, i.e. a slot with data, reaches its destination, it is marked as 'read'. An eraser node is used to identify 'read' slots and erase the data in the slots. In CRSR, there are two possible routes to send data from one node to another. The route with fewer nodes in between is always selected. This Minimum Node Count Routing reduces traffic on the transmission medium. IEEE has issued a Distributed Queue Dual Bus (DQDB) 802.6 standard for the subnetwork of a MAN. Under most circumstances, DQDB performs better than Fiber Distributed Data Interface (FDDI), an ANSI MAN standard. However, DQDB has two drawbacks: positional unfairness and poor channel efficiency. A number of solutions have been proposed to solve the unfairness problem, but these approaches do not improve the situation without negative effects on network performance. A CRSR with eraser in all its nodes has two times as much maximum throughput as an equivalent DQDB and at the same time, it is a positionally fair network. Although CRSRs with fewer eraser nodes are unfair, they always outperform equivalent DQDBs both in throughput and fairness.
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Date Issued
1993
PURL
http://purl.flvc.org/fcla/dt/12340
Subject Headings
Metropolitan area networks (Computer networks), Computer network architectures
Format
Document (PDF)
Adaptive hierarchical weighted fair queuing scheduling in WiMAX networks
Title
Adaptive hierarchical weighted fair queuing scheduling in WiMAX networks.
Creator
AL-Ghanem, Waleed Khalid, Ilyas, Mohammad, Mahgoub, Imad, Florida Atlantic University, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
The growing demand for faster connection to the Internet service and wireless multimedia applications has motivated the development of broadband wireless access technologies in recent years. WiMAX has enabled convergence of mobile and fixed broadband networks through a common wide-area radio-access technology and flexible network architecture. Scheduling is a fundamental component in resource management in WiMAX networks and plays the main role in meeting QoS requirements such as delay,...
Show moreThe growing demand for faster connection to the Internet service and wireless multimedia applications has motivated the development of broadband wireless access technologies in recent years. WiMAX has enabled convergence of mobile and fixed broadband networks through a common wide-area radio-access technology and flexible network architecture. Scheduling is a fundamental component in resource management in WiMAX networks and plays the main role in meeting QoS requirements such as delay, throughput and packet loss for different classes of service. In this dissertation work, the performance of uplink schedulers at the fixed WiMAX MAC layer has been considered, we proposed an Adaptive Hierarchical Weighted Fair Queuing Scheduling algorithm, the new scheduling algorithm adapts to changes in traffic, at the same time; it is able to heuristically enhance the performance of WiMAX network under most circumstances. The heuristic nature of this scheduling algorithm enables the MAC layer to meet the QoS requirements of the users. The performance of this adaptive WiMAX Uplink algorithm has been evaluated by simulation using MATLAB. Results indicate that the algorithm is efficient in scheduling the Base Stations’ traffic loads, and improves QoS. The utilization of relay stations is studied and simulation results are compared with the case without using relay stations. The results show that the proposed scheduling algorithm improves Quality of Service of WiMAX system.
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Date Issued
2014
PURL
http://purl.flvc.org/fau/fd/FA00004178, http://purl.flvc.org/fau/fd/FA00004178
Subject Headings
Computer networks -- Technological innovations, Optical fiber communication, Wireless communication systems -- Technological innovations, Wireless metropolitan area networks -- Security measures
Format
Document (PDF)