Download or read book Performance Analysis and Protocol Design for Multipacket Reception in Wireless Networks written by Pengxuan Zheng and published by . This book was released on 2007 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Analysis and Cooperative Protocol Design for Contention based Wireless Networks written by Tao Guo and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Protocol Design and Analysis for Cooperative Wireless Networks written by Wei Song and published by Springer. This book was released on 2016-11-03 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the design and analysis of protocols for cooperative wireless networks, especially at the medium access control (MAC) layer and for crosslayer design between the MAC layer and the physical layer. It highlights two main points that are often neglected in other books: energy-efficiency and spatial random distribution of wireless devices. Effective methods in stochastic geometry for the design and analysis of wireless networks are also explored. After providing a comprehensive review of existing studies in the literature, the authors point out the challenges that are worth further investigation. Then, they introduce several novel solutions for cooperative wireless network protocols that reduce energy consumption and address spatial random distribution of wireless nodes. For each solution, the book offers a clear system model and problem formulation, details of the proposed cooperative schemes, comprehensive performance analysis, and extensive numerical and simulation results that validate the analysis and examine the performance under various conditions. The last section of this book reveals several potential directions for the research on cooperative wireless networks that deserve future exploration. Researchers, professionals, engineers, and consultants in wireless communication and mobile networks will find this book valuable. It is also helpful for technical staff in mobile network operations, wireless equipment manufacturers, wireless communication standardization bodies, and governmental regulation agencies.
Download or read book Performance Analysis and Protocol Design of Opportunistic Routing in Multi hop Wireless Networks written by Chun Pong Luk and published by . This book was released on 2008 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Age of Information Aware Communication Systems written by Antzela Kosta and published by Linköping University Electronic Press. This book was released on 2020-04-16 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in wireless communications and networking technology have taken us towards a pervasively connected world in which a vast array of wireless devices, from mobile phones to environmental sensors, seamlessly communicate with each other. In many of these systems the freshness of the transmitted information is of high importance. Characterization of time-critical information can be achieved through the so-called real-time status updates that are messages, encapsulated in packets, carrying the timestamp of their generation. Status updates track time-varying content that needs to be transmitted from the generation point to a remote destination in a network. To quantify the freshness of information in networked systems, a novel metric, different from delay or latency, termed as “age of information” (AoI) has been introduced. In this thesis, we focus on characterizing and controlling age under various communication system setups. The first part of the thesis considers multiple access communication systems and comprises two papers. The first paper, investigates AoI in relation with throughput in a shared access setup with heterogeneous traffic. More specifically, we consider a shared access system consisting of a primary link and a network of secondary nodes, with multipacket reception (MPR) capabilities. To study the joint throughput-timeliness performance, we formulate two optimization problems considering both objectives and provide guidelines for the design of such a multiple access system satisfying both timeliness and throughput requirements. In the second paper, we study the AoI performance in various multiple access schemes, including scheduling and random access. We present an analysis of the AoI with and without packet management at the transmission queue of the source nodes, considering that packet management is the capability to replace unserved packets in the queue whenever newer ones arrive. We incorporate the effect of channel fading and network path diversity in such a system and provide simulation results that illustrate the impact of network operating parameters on the performance of the considered access protocols. The second part of the thesis considers the characterization of AoI and other freshness performance metrics in a point-to-point communication link, again comprising two papers. In the third paper of this thesis, we expand the concept of information ageing by introducing the cost of update delay (CoUD) metric to characterize the cost of having stale information at the destination. Furthermore, we introduce the value of information of update (VoIU) metric that captures the degree of importance of the update received at the destination. We employ queue-theoretic concepts and provide a theoretical analysis and insights into the prospects of cost and value. Finally, in the last paper, we study the properties of a sample path of the AoI process, and we obtain a general formula of its stationary distribution. We relate this result to a discrete time queueing system and provide a general expression of the generating function of AoI in relation with the system time, and the peak age of information (PAoI). To illustrate the applicability of the results, we analyze the AoI in single-server queues with different disciplines and assumptions. We build upon these results to provide a methodology for analyzing general non-linear age functions for this type of systems.
Download or read book Performance Analysis of Multiple Access Protocols written by Shūji Tasaka and published by MIT Press. This book was released on 1986 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Broadcast media, such as satellite, ground radio, and multipoint cable channels, can easily provide full connectivity for communication among geographically distributed users. One of the most important problems in the design of networks (referred to as packet broadcast networks) that can take practical advantage of broadcast channels is how to achieve efficient sharing of a single common channel. Many multiple access protocols, or algorithms, for packet broadcast networks have been proposed, and much work has been done on the performance evaluation of the protocols. A variety of techniques have been used to analyze the performance; however, this is the first book to provide a unified approach to the performance evaluation problem by means of an approximate analytical technique called equilibrium point analysis. Two types of packet broadcast networks - satellite networks and local area networks are considered, and eight multiple access protocols are studied and their performance analyzed in terms of throughput and average message delay. Contents Part I: Fundamentals - Multiple Access Protocols and Performance - Equilibrium Point Analysis - Part II: Satellite Networks - S-ALOHA - R-ALOHA - ALOHA-Reservation - TDMAReservation - SRUC - TDMA - Performance Comparisons of the Protocols for Satellite Networks - Part III: Local Area Networks - Buffered CSMACD - BRAM Performance Analysis of Multiple Access Protocols is included in the Computer Systems Series, Research Reports and Notes, edited by Herb Schwetman.
Download or read book Wireless Ad Hoc Networks with Receiver Multipacket Reception Performance Analysis and Signal Processing written by and published by . This book was released on 2005 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this research is to develop new theory and techniques that significantly improve performance of ad hoc networks by advanced signal processing and medium access control (MAC). In particular, we are interested in signal processing algorithms that are capable of separating signals from multiple users therefore provide multipacket reception (MPR) at the receiver, and MAC protocols that take advantage of the MPR capability of the physical layer. During the reporting period, we investigated signal processing techniques with efficient implementation to strengthen the multiuser physical layer of ad hoc networks. We have extended our previous results to wireless sensor networks for which we considered the problem estimating the number of operating sensors and energy distribution. We also considered the problem of reconstructing random signal field using data samples collected from the sensor field. Blind and semi-blind channel estimation and symbol detection algorithms are developed for long code wide-band CDMA systems including systems with multirate and multicode transmissions. A new identifiability condition is established which suggests that channels unidentifiable in short code CDMA systems are almost surely identifiable when aperiodic spreading codes are used. Applications in large scale sensor networks are also considered.
Download or read book Design and Performance Analysis of Wireless Networks written by Piyush Gupta and published by . This book was released on 2000 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Analysis of Multi Channel and Multi Traffic on Wireless Communication Networks written by Wuyi Yue and published by Springer Science & Business Media. This book was released on 2002-02-28 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book attempts to present exact and approximate analytical solution methods and techniques using queueing theory in the complex multimedia traffic systems with procedures of random multiple access schemes. In particular, this book presents how to approximate the system performance of discrete-time multimedia networks, the probability distribution of the interarrival time of internetwork packets at the adjacent network and the higher moments of the transmission departure distribution and delay in wireless multimedia communication environment. In general the modeling of discrete-time multimedia communication systems are more complex than that of continuous-time systems because multiple state changes can occur from one time-unit to the next. This complicates the analysis of the model. This book also discusses numerical results that illustrate the applications of the theory and various properties.
Download or read book On Channel Access Design for Wireless Networks with Multi packet Reception written by Ke Li and published by . This book was released on 2015 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: As wireless devices have emerged as a ubiquitous part of people's everyday lives, the demands for faster wireless communications become even more pressing. Fortunately, the advanced techniques of the physical layer such as multiple-input and multiple-output (MIMO), multi-user detection (MUD), advanced modulation, etc., make multi-packet transmission (MPT) and multi-packet reception (MPR) possible. It has been well recognized that the MPT/MPR technique can improve the performance of the wireless networks. However, novel algorithms at the medium-access control (MAC) and higher layers are needed to fully exploit the MPT/MPR capability. In this thesis, we study the behavior the MPT/MPR wireless network, evaluate its potential performance and design algorithms to efficiently and fairly manage the MPT/MPR networks. We start from a single-hop scenario where uncoordinated nodes share a MPR channel and assess its performance by designing additive-increase multiplicative-decrease MAC (AIMD-MAC) to achieve the max-min fairness. We show that with an appropriate set of parameters, AIMD-MAC can be applied to distributed environments where the number of nodes and channel capacity are not constant to achieve at least 90% of the performance of the benchmark. For multi-hop scenarios, we observe the M property of MPT/MPR networks, which profoundly changes the traditional understanding of managing a multi-hop wireless network. By identifying and investigating the M property, we propose novel algorithms to evaluate the MPT/MPR networks and demonstrate the relative importance of the MPT and MPR capacity limits. To efficiently manage the multi-hop flows traversing a MPT/MPR network, we design the AIMD backpressure MAC (AB-MAC) algorithm. Extensive simulations show that AB-MAC significantly outperforms IEEE 802.11 especially in dense networks.
Download or read book Multipacket Reception in Wireless Communication Networks written by Qing Zhao and published by . This book was released on 2001 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Network Coding Multi packet Reception and Feedback written by Arman Rezaee and published by . This book was released on 2011 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we address the combination of three technologies in wireless broadcast networks: network coding, multi-packet reception (MPR) and feedback. We will primarily discuss the performance of a single-hop network, both with and without these technologies. A single-hop network can be used as a building block for larger and more topologically diverse networks and provides a basis for analyzing the interaction of these mechanisms. Because many applications are interested in speedy transmission of data, we have focused our attention on answering the question of how to optimally use these technologies in order to reduce the overall transmission time. Initially, we consider a fully connected network and show that MPR capability of m can reduce the total time for a file transfer by as much as a factor of m/2 without network coding. We emphasize that a two-fold MPR capability will not reduce the total dissemination time without network coding and is thus ineffective. We also show that no gain can be obtained, if network coding is used without MPR. However the combination of network coding and MPR can reduce the total transfer time by as much as a factor of m. We then consider transmission of a file over a broadcast erasure channel with a potentially large number of receivers. Noting that traditional reliable multicast protocols suffer from the inevitable feedback implosion associated with servicing a large number of receivers, we present a novel feedback protocol dubbed SMART, Speeding Multicast by Acknowledgment Reduction Technique. The protocol involves an asymptotically optimal predictive model which determines a suitable feedback time that assures most receivers have completed the download. We also introduce a new single slot feedback mechanism, which enables any number of receivers to give their feedback simultaneously. We show that scheduling the feedback according to this predictive model and enhancing the protocol by the single slot mechanism reduces the feedback traffic as well as transmission of extraneous coded packets, and will provide a good completion time characteristic for all users. We show that counter to conventional wisdom, Quality of Experience (QoE) of multicast sessions is not sensitive to the number of users, however it is very sensitive to imbalanced effective rate and heterogeneity among users. Furthermore, we show that SMART performs nearly as well as an omniscient transmitter that requires no feedback.
Download or read book Multiple Access Protocols written by Raphael Rom and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computer communication networks have come of age. Today, there is hardly any professional, particularly in engineering, that has not been the user of such a network. This proliferation requires the thorough understanding of the behavior of networks by those who are responsible for their operation as well as by those whose task it is to design such networks. This is probably the reason for the large number of books, monographs, and articles treating relevant issues, problems, and solutions in this field. Among all computer network architectures, those based on broadcast mul tiple access channels stand out in their uniqueness. These networks appear naturally in environments requiring user mobility where the use of any fixed wiring is impossible and a wireless channel is the only available option. Because of their desirable characteristics multiple access networks are now used even in environments where a wired point-to-point network could have been installed. The understanding of the operation of multiple access network through their performance analysis is the focus of this book.
Download or read book Performance Analysis of Multiple Access Protocol written by Shuji Tasaka and published by MIT Press (MA). This book was released on 1986-04-01 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: Broadcast media, such as satellite, ground radio, and multipoint cable channels, can easily provide full connectivity for communication among geographically distributed users. One of the most important problems in the design of networks (referred to as packet broadcast networks) that can take practical advantage of broadcast channels is how to achieve efficient sharing of a single common channel.Many multiple access protocols, or algorithms, for packet broadcast networks have been proposed, and much work has been done on the performance evaluation of the protocols. A variety of techniques have been used to analyze the performance; however, this is the first book to provide a unified approach to the performance evaluation problem by means of an approximate analytical technique called equilibrium point analysis.Two types of packet broadcast networks - satellite networks and local area networks are considered, and eight multiple access protocols are studied and their performance analyzed in terms of throughput and average message delay.Contents: Part I: Fundamentals. Multiple Access Protocols and Performance. Equilibrium Point Analysis. Part II: Satellite Networks. S-ALOHA. R-ALOHA. ALOHA-Reservation. TDMAReservation. SRUC. TDMA. Performance Comparisons of the Protocols for Satellite Networks. Part III: Local Area Networks. Buffered CSMACD. BRAM.Shuji Tasaka is Associate Professor in the Department of Electrical and Computer Engineering, Nagoya Institute of Technology, Japan. Performance Analysis of Multiple Access Protocols is included in the Computer Systems Series, Research Reports and Notes, edited by Herb Schwetman.
Download or read book Cross Layer Optimizations for Performance Enhancement in Wireless Networks written by and published by . This book was released on 2008 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we focus on optimizing link layer performance and maximizing throughput in IEEE 802.11 wireless networks. We categorize our efforts into two directions: (a) throughput optimization and analysis of the 802.11 multi-rate networks via rate adaptation (b) design of a new MAC protocol for emerging multipacket reception capable wireless networks. Both our proposals assume cross layer interaction between the MAC and the PHY layers. In the first part of the work, we focus on the use of rate adaptation for throughput gains in time-varying wireless channels. We thoroughly investigate the impact of transmission rate on the performance of a wireless link. We then propose Stochastic Automata Rate Adaptation Algorithm (SARA) inspired by Stochastic Learning Automata (SLA), a machine learning technique for adaptation in random environments. Besides boosting throughput, SARA also provides an integrated and distributed solution for both stationary and non-stationary channel environments. SARA is completely compatible with existing IEEE 802.11 MAC standards. In the second part of the work, we move on to more advanced 802.11 networks that employ techniques like multiple antennas, DS-CDMA codes, spatial diversity techniques etc and have the capability of receiving multiple packets simultaneously. To provide the maximum performance benefits in these networks, we propose the use of a new MAC protocol Receiver-Based Multipacket Reception MAC (RB-MPR MAC) that relies on the use of a Multipacket Reception (MPR) matrix as cross-layer information. The application of MPR matrix, its benefits and limitations, impact of partitioning the network (Grouping) in a DS-CDMA system have been analyzed thoroughly and important results and interpretations have been put forward.
Download or read book Design and Performance Analysis of a Wireless Network written by Arun Gopinath and published by . This book was released on 2004 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distributed MAC Protocol for Networks with Multipacket Reception Capability and Spatially Distributed Nodes written by Guner Dincer Celik and published by . This book was released on 2007 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physical layer of future wireless networks will be based on novel radio technologies such as Ultra-Wideband (UWB) and Multiple-Input Multiple-Output (MIMO). One of the important capabilities of such technologies is the ability to capture a few packets simultaneously. This capability has the potential to improve the performance of the MAC layer. However, we show that in networks with spatially distributed nodes, reusing MAC protocols originally designed for narrow-band systems (e.g., CSMA/CA) is inefficient. It is well known that when networks with spatially distributed nodes operate with such MAC protocols, the channel may be captured by nodes that are near the destination. We show that when the physical layer enables multi-packet reception, the negative implications of reusing the legacy protocols include not only such unfairness but also a significant throughput reduction. We present a number of simple alternative backoff mechanisms that attempt to overcome the throughput reduction phenomenon. We evaluate the performance of these mechanisms via exact analysis, approximations, and simulation, thereby demonstrating that they usually outperform the legacy backoff mechanisms. We then discuss the implications of the results on developing realistic MAC protocols for networks with a multi-packet reception capability and in particular for UWB networks.
