Multi Access In Packet Radio Networks
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Multi Access In Packet Radio Networks
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Author : Erdal Arikan
language : en
Publisher:
Release Date : 1982
Multi Access In Packet Radio Networks written by Erdal Arikan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Mobile communication systems categories.
A PRN (packet radio network) is a collection of geographically distributed, possibly mobile users where each user is capable of transmitting and receiving messages over a shared broadcast medium. In a PRN, messages are divided into packets, which may be fixed or variable in length, and each packet is transmitted through the network individually. Packets are assembled at their destinations to reconstruct the original messages. The data traffic in a PRN is characterized by specifying the average message arrival rates to the network for each o-d (origin-destination) pair. A set of o-d rates is called feasible if there exist network protocols under which the number of packets in the network still not delivered to their destinations remains finite with probability one. The capacity region of a PRN is defined to be the set of all feasible sets of o-d rates. In this thesis, PRNs are studied from the viewpoint of feasibility, i.e., we take an arbitrary set of message input rates as given and try to determine if it is feasible. Our main conclusion is that, unless P = NP, there exists no practical algorithm for characterizing the capacity region of a PRN, in the sense that the decision problem regarding the feasibility of a given set of o-d rates in NP-complete. (Author).
Design And Analysis Of Multiple Access Protocols In Packet Radio Networks
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Author : Cheng-Shong Wu
language : en
Publisher:
Release Date : 1991
Design And Analysis Of Multiple Access Protocols In Packet Radio Networks written by Cheng-Shong Wu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Packet switching (Data transmission) categories.
A Busy Tone Multiple Access Type Scheme For Packet Radio Networks
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Author : Moshe Sidi
language : en
Publisher:
Release Date : 1981
A Busy Tone Multiple Access Type Scheme For Packet Radio Networks written by Moshe Sidi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Data transmission systems categories.
We consider a packet radio network whose stations share a communication channel and work with an algorithm similar to the busy-tone-multiple-access protocol of ALOHA systems. In this context, two problems are treated: distributed routing and bandwidth allocation. (Author).
Performance Evaluation Of Channel Access Schemes In Multihop Packet Radio Networks With Regular Structure By Simulation
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Author : Fouad A. Tobagi
language : en
Publisher:
Release Date : 1985
Performance Evaluation Of Channel Access Schemes In Multihop Packet Radio Networks With Regular Structure By Simulation written by Fouad A. Tobagi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Computer networks categories.
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).
Multiaccess Mobility And Teletraffic
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Author : David Everitt
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Multiaccess Mobility And Teletraffic written by David Everitt and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
Designers of wireless networks face a problem which is multidimensional in nature, where issues of multiaccess, radio propagation, antennas, mobility and teletraffic all need to be understood and simultaneously addressed in order to create a properly functioning system. This book does not merely concentrate on one of these issues but takes a broader view, and presents a mix of papers addressing systems and networking issues. Multiaccess, Mobility and Teletraffic: Advances in Wireless Networks addresses fundamental theoretical issues about future wireless networks, such as capacity improvements theoretically attainable from spread spectrum systems, and practical concerns associated with current networks such as signalling, implementation of GSM and CDMA networks, and implementation of packet data services over wireless networks. As well as the papers looking at specific technologies, this book contains a number of papers discussing more generic problems in mobile networks, such as issues associated with handoff, resource management, frequency reuse, mobility, signalling and wireless packet networks. Multiaccess, Mobility and Teletraffic: Advances in Wireless Networks covers a broad range of issues associated with wireless networks and provides a very interesting snapshot of the current state-of-the-art. It will be of interest to all researchers and practitioners working in the field of wireless communications and networks.
Analysis Of Code Division Multiple Access Packet Radio Networks
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Author : Hong Zhang
language : en
Publisher:
Release Date : 1994
Analysis Of Code Division Multiple Access Packet Radio Networks written by Hong Zhang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Radio categories.
Thoughput Performance Of Spread Spectrum Multiple Access Packet Radio Networks
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Author : Stanford University. Computer Systems Laboratory
language : en
Publisher:
Release Date : 1987
Thoughput Performance Of Spread Spectrum Multiple Access Packet Radio Networks written by Stanford University. Computer Systems Laboratory and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.
Architectures And Performance Of Multichannel Multihop Packet Radio Networks
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Author : Nachum Shacham
language : en
Publisher:
Release Date : 1986
Architectures And Performance Of Multichannel Multihop Packet Radio Networks written by Nachum Shacham and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Packet radio networks that employ several parallel multiple-access channels are considered. An architecture for such a network dictates the selection of channels for packet transmission. We propose and analyze two multichannel architectures. In the first, each node employs a single radio and is assigned a channel on which it listens when it does not transmit. To transmit a packet, the node tunes its radio to the channel of the intended receiver for that transmission only. The second architecture requires each radio to use a single channel for both transmission and reception, but provides some of the nodes with more than one radio each, allowing them to serve as bridges between channels. Within these architectures one can further select the amount of routing information held by each node and the channel-access protocol, both of which greatly affect the network performance. To ascertain the effect of the various parameters, we calculate the throughput and average packet progress in both architectures. The channel access protocols we consider are slotted ALOHA and CSMA with and without capture. We also evaluate the effect of increasing the amount of routing information held be the nodes.
Multi Access Strategies For Voice Data Integration In Heterogeneous Mixed Media Packet Radio Networks
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Author :
language : en
Publisher:
Release Date : 1992
Multi Access Strategies For Voice Data Integration In Heterogeneous Mixed Media Packet Radio Networks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
The problem of voice/data integration in a mixed-media packet radio network employing both ground radio links and SATCOM radio links is investigated. Multi-access strategies are devised to take advantage of different characteristics of both radio channels to better serve the requirements of both traffic types. Code-division multiple-access with movable boundary in the code domain is used in the ground subnetwork to serve the voice traffic and the retransmitted data traffic while framed ALOHA with movable boundary is used on the satellite subnetwork for both data and voice. Based on a Markovian model of the system, a complete analysis of the channel access protocols for both traffic types is given. The performance of the multiple-access schemes used in this mixed-media network is evaluated in terms of voice and data throughput, voice blocking probability, and data delay. It is observed that splitting of retransmission traffic between the satellite and ground subnet may increase the overall data throughput when the voice load is high.
Floor Acquisition Multiple Access Fama For Packet Radio Networks
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Author :
language : en
Publisher:
Release Date : 1995
Floor Acquisition Multiple Access Fama For Packet Radio Networks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
A family of medium access control protocols for single-channel packet radio networks is specified and analyzed. These protocols are based on a new channel access discipline called floor acquisition multiple access (FAMA), which consists of both carrier sensing and a collision-avoidance dialogue between a source and the intended receiver of a packet. Control of the channel (the floor) is assigned to at most one station in the network at any given time, and this station is guaranteed to be able to transmit one or more data packets to different destinations with no collision with transmissions from other stations. The minimum length needed in control packets to acquire the floor is specified as a function of the channel propagation time. The medium access collision avoidance (MACA) protocol proposed by Karn and variants of CSMA based on collision avoidance are shown to be variants of FAMA protocols when control packets last long enough compared to the channel propagation delay. The throughput of FAMA protocols is analyzed and compared with the throughput of non-persistent CSMA. This analysis shows that using carrier sensing as an integral part of the floor acquisition strategy provides the benefits of MACA in the presence of hidden terminals, and can provide a throughput comparable to, or better than, that of non-persistent CSMA when no hidden terminals exist.