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Author: David Hilton Shur Publisher: ISBN: Category : Languages : en Pages : 400
Book Description
Packet switched networks provide an efficient and flexible method for interconnecting geographically distributed users for the purpose of digital data transmission. In packet radio networks, nodes transmit packets over multiple-access broadcast radio channels instead of wire, cable or fiber optics links. If the destination node of a packet is not within the power range of its source node, intermediate nodes are needed to deliver the packet in a store-and-forward fashion. Therefore, multihop packet radio networks have both the multiple-access feature typical of broadcast networks and the store-and-forward feature of point-to-point networks. Since only under restrictive assumptions is performance analysis tractable, simulation techniques must be used. (jes).
Author: David Hilton Shur Publisher: ISBN: Category : Languages : en Pages : 400
Book Description
Packet switched networks provide an efficient and flexible method for interconnecting geographically distributed users for the purpose of digital data transmission. In packet radio networks, nodes transmit packets over multiple-access broadcast radio channels instead of wire, cable or fiber optics links. If the destination node of a packet is not within the power range of its source node, intermediate nodes are needed to deliver the packet in a store-and-forward fashion. Therefore, multihop packet radio networks have both the multiple-access feature typical of broadcast networks and the store-and-forward feature of point-to-point networks. Since only under restrictive assumptions is performance analysis tractable, simulation techniques must be used. (jes).
Author: Fouad A. Tobagi Publisher: ISBN: Category : Computer networks Languages : en Pages : 72
Book Description
In this report, the performance of various channel access schemes in multi-hop packet radio networks with a regular structure is studied by means of simulation. The channel access schemes considered are: ALOHA (pure and slotted), Carrier Sense Multiple Access (CSMA), Busy Tone Multiple Access (BTMA), Code Division Multiple Access (CDMA), and a new hypothetical scheme introduced here for comparison purposes referred to as Coded Activity Signalling Multiple Access (CASMA. Network throughput and packet delay are evaluated, as well as the effects on performance of the nodal transmission scheduling rate, the propagation delay among nodes, and to some extent the input flow control. In this study, we consider networks in which both the topology and the traffic pattern are symmetric. This renders all nodes in the network statistically identical, and thus helps reduce the complexity of the simulation task considerably without jeopardizing the objective. The performance of CSMA in such networks is shown to be rather poor as compared with its performance in fully connected networks, while relatively high performance is achieved by the CASMA scheme, as compared with CSMA and the ALOHA schemes. (RH).
Author: Wuyi Yue Publisher: Springer Science & Business Media ISBN: 0306473119 Category : Computers Languages : en Pages : 335
Book Description
With the rapidly increasing penetration of laptop computers and mobile phones, which are primarily used by mobile users to access Internet s- vices like e-mail and World Wide Web (WWW) access, support of Internet services in a mobile environment is an emerging requirement. Wireless n- works have been used for communication among fully distributed users in a multimedia environment that has the needs to provide real-time bursty traffic (such as voice or video) and data traffic with excellent reliability and service quality. To satisfy the huge wireless multimedia service demand and improve the system performance, efficient channel access methods and analytical methods must be provided. In this way very accurate models, that faithfully reproduce the stochastic behavior of multimedia wireless communication and computer networks, can be constructed. Most of these system models are discrete-time queueing systems. Queueing networks and Markov chains are commonly used for the p- formance and reliability evaluation of computer, communication, and m- ufacturing systems. Although there are quite a few books on the individual topics of queueing networks and Markov chains, we have found none that covers the topics of discrete-time and continuous-time multichannel mul- traffic queueing networks. On the other hand, the design and development of multichannel mul- hop network systems and interconnected network systems or integrated n- works of multimedia traffic require not only such average performance m- sures as the throughput or packet delay but also higher moments of traffic departures and transmission delay.
Author: Fouad A. Tobagi Publisher: ISBN: Category : Languages : en Pages : 22
Book Description
This is the final report for the research carried out at the Computer Systems Laboratory under ARO contract number DAAG 27-79-C-0138 during the period from August 6, 1979 to November 5, 1982. The research effort related to packet radio systems and their evaluation. Throughout the contract period, the effort mainly focused on one important aspect underlying these networks, namely the channel access problem.
Author: Publisher: ISBN: Category : Languages : en Pages : 125
Book Description
For many years, the technologies involved in the newest generations of tactical communication equipment have increased the reliability and security of tactical voice communications from the highest to the lowest levels of combat command. However, the complexities inherent to wireless data networks have prevented the reach of valuable data links from extending efficiently and reliably to the lowest levels of tactical command. This thesis attempts to quantify the performance of tactical data networks using existing technologies and currently deployed mobile wireless networking devices by analyzing the results of network simulations involving currently deployed devices. By quantifying these performance metrics and comparing them to previously collected simulation results involving experimental technologies, we hope to provide a mode of comparison that will accurately reflect the degree to which newer mobile wireless networking devices will benefit our operational forces.
Author: Günter Haring Publisher: Springer ISBN: 3540465065 Category : Computers Languages : en Pages : 523
Book Description
This monograph-like state-of-the-art survey presents the history, the key ideas, the success stories, and future challenges of performance evaluation and demonstrates the impact of performance evaluation on a variety of different areas through case studies in a coherent and comprehensive way. Leading researchers in the field have contributed 19 cross-reviewed topical chapters competently covering the whole range of performance evaluation, from theoretical and methodological issues to applications in numerous other fields. Additionally, the book contains one contribution on the role of performance evaluation in industry and personal accounts of four pioneering researchers describing the genesis of breakthrough results. The book will become a valuable source of reference and indispensable reading for anybody active or interested in performance evaluation.
Author: David Hilton Shur
Author: David Hilton Shur
Author: Fouad A. Tobagi
Author: Stanford University. Computer Systems Laboratory
Author: Wuyi Yue
Author: Hahan Rahardjo
Author: Fouad A. Tobagi
Author: Yangwei Wang
Author: 
Author: Renju Saraswathy Narayanan
Author: Günter Haring