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Performance modeling and analysis of bluetooth networks
Bluetooth is a recent wireless communication technology specifically intended for short range ad hoc networking. It was initially envisaged as a simple cable replacement technology to connect various mobile, portable, and fixed devices such as PDAs, mobile phones, laptops, and printers, but its use has soon spread to include various general purpose networking tasks, and a number of Bluetooth-enabled devices have appeared on the market. In...
319 p dtu 15/11/2012 218 1
Từ khóa: bluetooth networks, wireless communication technology, Bluetooth technology, kỹ thuật công nghệ, công nghệ không dây, công nghệ truyền thông
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
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 168 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
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 174 1
Từ khóa: wireless networks, Wireless Local Area Network, data communications, truyền thông dữ liệu, kỹ thuật mạng, công nghệ mạng
Handbook on satellite communications (HSC)
Satellite communications now form an integral part of our new "wired" world. Since their introduction in about 1965, satellite communications have generated a multiplicity of new telecommunication or broadcasting services on a global or regional basis. In particular, they have enabled a global, automatically-switched telephony network to be created. Although, since 1956 (TAT1), submarine cables began to operationally connect the continents of...
1106 p dtu 10/11/2012 181 1
Từ khóa: satellite communications, satellite communications, truyền thông vệ tinh, thông tin liên lạc, data transmission, công nghệ truyền thông
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 217 1
Từ khóa: communication technologies, Wireless Networks, Mobile Computing, công nghệ truyền thông, linh kiện điện tử, kỹ thuật điện tử
Khái quát về truyền động thủy lực
Thủy lực học là ngành kĩ thuật nghiên cứu về các vấn đề mang tính thực dụng bao gồm: lưu trữ, vận chuyển, kiểm soát, đo đạc nước và các chất lỏng khác. Thủy lực có phương pháp nghiên cứu dựa trên nền tảng các định luật vật lí tác động lên thể nước (thể lỏng nói chung). Tuy nhiên, nó khác với ngành cơ học chất lỏng là đề cập...
19 p dtu 10/11/2012 215 1
Từ khóa: truyền động thủy lực, chuyển động chất lỏng, hệ thống thủy lực, thủy lực công nghiệp, ứng dụng thũy lực, khoa học công nghệ
Fiber to the home the new empowerment
Ever since the days of the caveman and his tom-toms, humans have used a bewildering variety of communication technologies: smoke signals, flags, copper wire pairs, coax, two-way or broadcast terrestrial and satellite radio, carriercurrent over power lines, point–point microwave, free-space infrared, and, of course, optical fiber. Out of this grab bag of delivery mechanisms, two stand out as likely to dominate all others as the twenty-first...
157 p dtu 09/11/2012 203 1
Từ khóa: communication technologies, Fiber to the home, satellite radio, công nghệ tuyền thông, kỹ thuật truyền thông, công nghệ mạng
GSM Switching, Services and Protocols
Global System for Mobile Communication (GSM) is a new standard set by the European Telecommunications Standard Institute. GSM is a cellular system using digital radio access technology for cellular networks and to provide quality radio communication. This book offers detailed insight into this topical area of GSM cellular radio. Featuring numerous illustrations, this work focuses on the fundamentals of the mobile radio system, covering the...
339 p dtu 09/11/2012 195 1
Từ khóa: Mobile Communication, cellular system, GSM Switching, hệ thống di động, truyền thông di động, công nghệ viễn thông
Digital signal processors in cellular radio communications
Current trents suggest that the wireless communications industry will continue to grow at an impressive rate. Today, the dominant application of wireless technologies is speech communications. A number of cordless, cellular, and personal communications services (PCS)standards have been developed and at least half a dozen of them are successful such as global system for mobile communications (GSM), IS-136, IS-95, PDC, Digital European...
14 p dtu 07/11/2012 229 1
Từ khóa: wireless communications, wireless technologies, personal communications, mobile communications, công nghệ không dây, công nghệ truyền thông, radio communications
Wireless Mobile Networking with ANSI-41
To begin to understand the ANSI-41 signaling protocol, it is necessary to understand some basics about wireless telecommunications. This chapter provides a general overview of the most important concepts in wireless cellular telecommunications that apply to ANSI-41. For some readers, this will be a high-level review; for others, it may clarify some misconceptions and provide an overall understanding of cellular wireless technology that will be...
503 p dtu 04/11/2012 186 1
Từ khóa: Wireless Mobile Networking with ANSI-41, Wireless Telecommunications, Network Architecture, công nghệ không dây, công nghệ truyền thông, viễn thông di động