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3G systems aim to fulfill the requirements of bandwidth-hungry services. They will offer global mobile multimedia communication capabilities in a seamless and efficient manner by supporting data rates up to 2 Mbps. This paper covers issues relating to 3G air-interface standards and the fixed part of the network, followed by a discussion on 4G syste...
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Due to the recent wireless market explosion, it is forecastable that in the near future, mobile terminals will deploy both voice and true multimedia services. In this framework, the need for a low-power, multimedia oriented IP is noted. In particular, since the greater part of video coding standards rely on common functionalities, it is very import...
High rate packet data (HRPD) is a high speed (up to 2.4 Mbps) third generation wireless network specification that has been developed for bandwidth intensive data and multimedia applications. In HRPD, the sector throughput can be maximized by having the frame scheduler take into account the instantaneous radio conditions of users and by serving use...
Citations
... If we want to have more choices in choosing the number of nodes in a group, we can use a wireless technology with higher data rate. For example, if we use 3G network, [32]. This translates to the maximum supported to be 18 (or equivalently each group using a single direct wireless link can have at most 37 nodes), and the constraint on is . ...
It is foreseen that a future smart grid has to handle more dynamic and distributed electricity supply and consumption. In that case, a robust automation system becomes essential. To monitor the status of the power system, a large amount of sensors are deployed in both the transmission grid and distribution grid. The sensors generate massive amount of data periodically for automation. This paper studies how the data measured on transmission lines can be delivered efficiently to substations. It has been demonstrated that the traditional way of data transmission is not sufficient and direct wireless links should be used to reduce the delay in information delivery. Furthermore, optimal placement of these direct wireless links is studied aiming at minimizing the delay in information delivery. The associated energy consumption in data transmission is also investigated.
The new edition of Advanced Wireless Communications: 4G Cognitive andCooperative Broadband Technology, 2nd Edition, including the latest developments. In the evolution of wireless communications, the dominant challenges are in the areas of networking and their integration with the Future Internet. Even the classical concept of cellular networks is changing and new technologies are evolving to replace it. To reflect these new trends,Advanced Wireless Communications & INTERNET builds upon the previous volumes, enhancing the existing chapters, and including a number of new topics. Systematically guiding readers from the fundamentals through to advanced areas, each chapter begins with an introductory explanation of the basic problems and solutions followed with an analytical treatment in greater detail. The most important aspects of new emerging technologies in wireless communications are comprehensively covered including: next generation Internet; cloud computing and network virtualization; economics of utility computing and wireless grids and clouds. This gives readers an essential understanding of the overall environment in which future wireless networks will be operating. Furthermore, a number of methodologies for maintaining the network connectivity, by using tools ranging from genetic algorithms to stochastic geometry and random graphs theory, and a discussion on percolation and connectivity, are also offered. The book includes a chapter on network formation games, covering the general models, knowledge based network formation games, and coalition games in wireless ad hoc networks. Illustrates points throughout using real-life case studies drawn from the author's extensive international experience in the field of telecommunications. Fully updated to include the latest developments, key topics covered include: Advanced routing and network coding; Network stability control; Relay-assisted Wireless Networks; Multicommodity flow optimization problems, flow optimization in heterogeneous networks, and dynamic resource allocation in computing clouds. Methodically guides readers through each topic from basic to advanced areas. Focuses on system elements that provide adaptability and re-configurability, and discusses how these features can improve wireless communications system performance.
A novel multi-passband lightning protector simultaneously compatible for base stations of 2G and 3G cellular systems is designed, fabricated and measured. Based on the theory of extended quarter wavelength filter, this protector successfully acquires 3 transmission poles. The VSWRs in three passbands, 800–1000 MHz, 1700–2200 MHz and 2300–2500 MHz, are lower than 1.10,1.12,1.08, respectively. It indicates that this device transmits 2G and 3G signals with very low losses while effectively protecting inner circuits from lightning induction. By applying the approach presented in this paper, other multi-band protectors can also be realized to fit different frequency regulations for various 2G and 3G standards.
