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This book is a crash course about broadband technology and services. It is not a textbook. The book lays a foundation of understanding about what broadband is and what it is not. It will not cover every broadband technology, but will address the popular and up-and-coming broadband technologies. Those who should be reading this book include: the technologist who does not understand what broadband is and needs a working understanding of the...
337 p dtu 10/11/2012 198 1
Từ khóa: Broadband Crash Course, broadband technology, Wide Area Networks, công nghệ mạng, công nghệ viễn thông, băng thông rộng
Protocols for high-efficiency wireless networks
Radio transmissions have opened new frontiers allowing the exchange of information with remote units. From the first applications of telegraphy and radio broadcast, wireless transmissions have obtained a great success with the widespread diffusion of mobile communications. We live in the communication era, where any kind of information must be easy accessible to any user at any time. Mobile communication systems are the technical support that...
301 p dtu 10/11/2012 164 1
Từ khóa: wireless networks, Radio transmissions, wireless transmissions, công nghệ truyền thông, công nghệ không dây, kỹ thuật truyền thông
Satellites for communication services have evolved quite significantly in size and power since the launch of the first commercial satellites in 1965. This has permitted a consequent reduction in the size of earth stations, and hence their cost, with a consequent increase in number. Small stations, with antennas in the order of 1.2–1.8 rn, have become very popular under the acronym VSAT, which stands for ’Very Small Aperture Terminals’....
296 p dtu 10/11/2012 176 1
Từ khóa: communication services, commercial satellites, monitoring data, VSAT networks, mạng viễn thông, công nghệ viễn thông, hệ thống thông tin
Broadband Powerline Communications Networks Network Design
Access networks implement the inter-connection of the customers/subscribers to wide-area communication networks. They allow a large number of subscribers to use various telecommunications services. However, the costs of realization, installation, and maintenance of access networks are very high, very often representing more than 50% of the investment in the network. Therefore, network providers try to realize the access network at as low a...
292 p dtu 10/11/2012 169 1
Từ khóa: Communications Networks, Network Design, thiết kế mạng, công nghệ viễn thông, communication networks, truyền thông mạng
IP-Based Next-Generation Wireless Networks Systems, Architectures, and Protocols
Wireless networks are evolving into wireless IP (Internet Protocol) networks to overcome the limitations of traditional circuit-switched wireless networks. Wireless IP networks are more suitable for supporting the rapidly growing mobile data and multimedia applications. IP technologies bring the globally successful Internet service creation and offering paradigm to wireless networks, bringing the vast array of Internet services to mobile users...
438 p dtu 10/11/2012 183 1
Từ khóa: Wireless Networks Systems, Wireless networks, circuit-switched, công nghệ vô tuyến, công nghệ truyền thông, công nghệ viễn thông
Ants, single-celled creatures such as the cellular slime mold, plants and animals in ecosystems, and (even) human beings can congregate and display miraculously complex behaviors.* Say a colony of ants in a tree needs to move to another tree, perhaps in search of food. Some ants build a bridge by joining their bodies in a chain stretching from one limb in one tree to another limb in another tree. Other ants cross over this ant structure,...
234 p dtu 10/11/2012 170 1
Từ khóa: IP Routing, routing protocol, IP networks, công nghệ mạng, kỹ thuật mạng, khoa học công nghệ
This redbook identifies some of the basic design aspects of IP networks and explains how to deal with them when implementing new IP networks or redesigning existing IP networks. This project focuses on internetwork and transport layer issues such as address and name management, routing, network management, security, load balancing and performance, design impacts of the underlying networking hardware, remote access, quality of service, and...
324 p dtu 10/11/2012 194 1
Từ khóa: IP Network Design Guide, IP networks, networking hardware, thiết kế mạng, kỹ thuật mạng, công nghệ mạng
Introduction to RF propagation
With the rapid expansion of wireless consumer products, there has been a considerable increase in the need for radio-frequency (RF) planning, link planning, and propagation modeling.A network designer with no RF background may find himself/herself designing a wireless network. A wide array of RF planning software packages can provide some support, but there is no substitute for a fundamental understanding of the propagation process and the...
349 p dtu 10/11/2012 185 1
Từ khóa: Introduction to RF propagation, radio-frequency, network designer, thiết kế mạng, công nghệ viễn thông, kỹ thuật mạng
Implementing 802.11, 802.16, and 802.20 Wireless Networks
Communication, a word that many associate with modern technology, actually has nothing to do with technology. At its core, communication involves nothing more than the spoken or written word, and symbolic languages like art and music. Technology has become synonymous with communication because technology has historically been the method by which communication to or by the general population takes place. From the printing press to the...
255 p dtu 10/11/2012 180 1
Từ khóa: Wireless Networks, technology communication, radio technology, công nghệ vô tuyến, kỹ thuật vô tuyến, công nghệ vô tuyến
Image processing using pulse-coupled neural networks
Humans have an outstanding ability to recognise, classify and discriminate objects with extreme ease. For example, if a person was in a large classroom and was asked to find the light switch it would not take more than a second or two. Even if the light switch was located in a different place than the human expected or it was shaped differently than the human expected it would not be difficult to find the switch. Humans also don’t need to...
169 p dtu 10/11/2012 165 1
Từ khóa: Neural Networks, biological systems, Image processing, kỹ thuật xử lý, công nghệ xử lý, xử lý hình ảnh, kỹ thuật số
Hardening IEEE 802.11 wireless networks
IEEE 802.11 is a Wireless Local Area Network (WLAN) standard which specifies a radio interface and Layer 2 (Link Layer) protocol for data communications in the 2.4 Ghz spectrum. 802.11b supports up to 11 Mbps of capacity, depending on what part of the world you are in, and has a range of up to a hundred meters or more in open spaces, but more like 50 Meters in a practical office environment using off the shelf equipment. 802.11b is not just...
20 p dtu 10/11/2012 175 1
Từ khóa: wireless networks, Wireless Local Area Network, data communications, truyền thông dữ liệu, kỹ thuật mạng, công nghệ mạng
Handbook of Wireless Networks and Mobile Computing
The past five decades have witnessed startling advances in computing and communication technologies that were stimulated by the availability of faster, more reliable, and cheaper electronic components. The design of smaller and more powerful devices enabled their mobility, which is rapidly changing the way we compute and communicate. For instance, the worldwide number of cellular phone subscribers has quadrupled in the last five years and has...
648 p dtu 10/11/2012 218 1
Từ khóa: communication technologies, Wireless Networks, Mobile Computing, công nghệ truyền thông, linh kiện điện tử, kỹ thuật điện tử