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Author: Jungmin So
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Jungmin So
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Ashwin P. Kowdle
Publisher:
ISBN:
Category : Multichannel communication
Languages : en
Pages : 146
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Author: Wuyi Yue
Publisher: Springer Science & Business Media
ISBN: 0306473119
Category : Computers
Languages : en
Pages : 335
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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: Kai Zeng
Publisher: John Wiley & Sons
ISBN: 1119974291
Category : Technology & Engineering
Languages : en
Pages : 211
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This book provides an introduction to opportunistic routing an emerging technology designed to improve the packet forwarding reliability, network capacity and energy efficiency of multihop wireless networks This book presents a comprehensive background to the technological challenges lying behind opportunistic routing. The authors cover many fundamental research issues for this new concept, including the basic principles, performance limit and performance improvement of opportunistic routing compared to traditional routing, energy efficiency and distributed opportunistic routing protocol design, geographic opportunistic routing, opportunistic broadcasting, and security issues associated with opportunistic routing, etc. Furthermore, the authors discuss technologies such as multi-rate, multi-channel, multi-radio wireless communications, energy detection, channel measurement, etc. The book brings together all the new results on this topic in a systematic, coherent and unified presentation and provides a much needed comprehensive introduction to this topic. Key Features: Addresses opportunistic routing, an emerging technology designed to improve the packet forwarding reliability, network capacity and energy efficiency of multihop wireless networks Discusses the technological challenges lying behind this new technology, and covers a wide range of practical implementation issues Explores many fundamental research issues for this new concept, including the basic principles of opportunistic routing, performance limits and performance improvement, and compares them to traditional routing (e.g. energy efficiency and distributed opportunistic routing protocol design, broadcasting, and security issues) Covers technologies such as multi-rate, multi-channel, multi-radio wireless communications, energy detection, channel measurement, etc. This book provides an invaluable reference for researchers working in the field of wireless networks and wireless communications, and Wireless professionals. Graduate students will also find this book of interest.
Author: Megha Maiya
Publisher:
ISBN:
Category : Computer network protocols
Languages : en
Pages : 70
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Trends in wireless networks are increasingly pointing towards a future with multi-hop networks deployed in multi-channel environments. In this thesis, we present the design for iMAC--a protocol targeted at medium access control in such environments. iMAC uses control packets on a common control channel to faciliate a three-way handshake between the sender and receiver for every packet transmission. This handshake enables the sender and receiver to come to consensus on a channel to use for data transmission and also signals to neighboring nodes about the contention on that channel. iMAC then uses a mechanism similar to 802.11 for data communication. Our evaluation of iMAC shows that it provides significant gains in throughput in comparison with uninformed channel selection, especially when contention for channel bandwidth is neither too low nor too high; intelligent selection of channels by iMAC is necessary to harness available bandwidth resources in the presence of medium levels of contention.
Author: Sherin Abdel Hamid
Publisher: Springer Science & Business Media
ISBN: 1461463572
Category : Computers
Languages : en
Pages : 81
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The focus of this brief is to identify what unifies and what distinguishes the routing functions in four wireless multi-hop network paradigms. The brief introduces a generic routing model that can be used as a foundation of wireless multi-hop routing protocol analysis and design. It demonstrates that such model can be adopted by any wireless multi-hop routing protocol. Also presented is a glimpse of the ideal wireless multi-hop routing protocol along with several open issues.
Author: Mohammad Asadul Hoque
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 164
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Wireless Networks provide a very cost efficient solution for data connectivity over wide areas enabling ubiquitous computing environment through multi-hop relay. The scope of this dissertation encompasses two correlated domains of Wireless Network area, one is the Multi-Radio Multi-Channel Wireless Mesh Network (MRMC-WMN) and the other is Vehicular Ad hoc Network (VANET). The research issues studied here are related to IEEE 802.11 based, multi-hop ad hoc wireless network. In the first part, we deal with some of the fundamental issues of Wireless Networks, with particular emphasis given on approaches and techniques for channel assignment and delay analysis in multi-radio multi-channel wireless mesh network. A novel channel assignment scheme has been proposed utilizing Partially Overlapped Channel (POC). We also introduced the notion of I-Matrix as a new interference model which takes into account one additional type of channel interference ignored by most researchers. Specifically, our interference model considers the effect of Self-Interference for multi-radio environment in addition to Adjacent Channel Interference(ACI) and Co-Channel Interference. We evaluate the performance of our POC based channel assignment algorithm in terms of capacity by comparing with the one using only orthogonal channels. Our results show capacity improvement as the increased link assignments at an average of more than 15 percent. The second part presents a spatio-temporal analysis of multi-hop V2V connectivity and network partitioning along with the statistical behavior of urban taxi mobility pattern. We developed two new approaches in analyzing the connectivity. One is the bitwise matrix manipulation for determining multi-hop connectivity and transitive closure. The other is the detection of saturated connectivity based on the k-hop reachability. The proposed algorithm of generating multi-hop reachability and network partition, though not optimal in performance, is better than traditional BFS approach in terms of space and time complexity. We then apply our algorithm for spatio-temporal analysis of urban taxi mobility pattern. Using the presented empirical analyses, wireless researchers can estimate the capabilities and constraints of vehicular communication from connectivity and mobility patterns as well as government can plan and work on issues related to implementing proper DSRC infrastructure for optimal data connectivity in urban area. We also propose an innovative application of V2X communication for Intelligent Transportation System (ITS). The application relates to DSRC based taxi hailing system in urban metropolitan area. The proposed system can work in both presence and absence of ITS infrastructure. Our evaluation results show that the system can not only reduce the passenger's waiting time and driver's empty cruise time, but also increase the overall taxi availability using multi-hop communication.
Author: Wuyi Yue
Publisher:
ISBN: 9781475783759
Category :
Languages : en
Pages : 356
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Author: Yong Ding (Graduate of Michigan State University)
Publisher:
ISBN:
Category : Computer network protocols
Languages : en
Pages : 394
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Author: Kezhu Hong
Publisher:
ISBN:
Category : Computer network protocols
Languages : en
Pages : 286
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