Broadband networks

About: Broadband networks is a research topic. Over the lifetime, 8718 publications have been published within this topic receiving 166336 citations. The topic is also known as: Broadband Internet access; BIA & Broadband networks.

Distributed edge switching system for voice-over-packet multiservice network

Abstract: A network device including a plurality of communication interfaces, including a telephone line interface, a computer data interface, and a broadband network interface; a processor; a machine-readable storage medium which during use stores a call processing application and service profiles, and which stores executable instructions to mediate communications between the plurality of communication interfaces, the instructions causing the network device to detect network signaling events or trigger points in a telephone call and invoke the call processing application in response to the detected network signaling events or trigger points, the call processing application operating according to parameters defined in the service profiles.

UMTS/IMT-2000 based on wideband CDMA

Abstract: The UMTS terrestrial radio access is based on wideband 4.096 Mchip/s DS-CDMA technology. UTRA will be connected to an evolved GSM core network for both circuit and packet services. A merger between ETSI/Europe and ARIB/Japan based on W-CDMA, a GSM core network, and a common frequency allocation according to the ITU Recommendation of 2 GHz makes a global IMT-2000 standard feasible. UTRA based on W-CDMA fully supports the UMTS/IMT-2000 requirements (e.g., support of 384 kb/s for wide-area coverage and 2 Mb/s for local coverage). Furthermore, the air interface has flexible support of mixed services, variable-rate services, and an efficient packet mode. Key W-CDMA features also include improved basic capacity/coverage performance compared to second-generation systems, full support of adaptive antenna arrays, support of hierarchical cell structures with interfrequency handover, and support of asynchronous inter-base-station operation. There have been no constraints due to the strong requirements for backward compatibility with second-generation systems. This has facilitated a high degree of flexibility and a future-proof air interface. Extensive evaluations by means of simulations and field trials have been carried out by a number of companies, and full system tests are ongoing. Consequently, W-CDMA technology can now be regarded as a mature technology, ready to provide the basis for UMTS/IMT-2000.

Downloading applications software through a broadcast channel

Abstract: Set-top terminals utilized in broadband broadcast networks are becoming increasingly intelligent (programmable). However, transmitting executable code, data and interactive audio/video materials through a selectively dedicated link requires an extensive, broadband point-to-point broadband network, which is prohibitively expensive to implement for large numbers of customers. The present invention provides for downloading application software and transmitting audio/video information through one channel of a digital broadcast network. The network also provides two-way, low-speed data communications capacity, e.g. for signaling and/or interactive text services. Signaling via data communication with a text server controls downloading of executable code from the digital broadcast channel into a programmable digital set-top terminal. Execution of the downloaded code in turn controls selective capture and presentation of audio and video segments received over one of the digital broadcast channels. Resident operating system and application software in the terminal provides all communication with nodes of the network. The downloaded code forms a non-resident application having a set of predetermined function calls for activating communication functions of the resident software.

Broadband wireless access solutions based on OFDM access in IEEE 802.16

Abstract: Broadband wireless access is the most challenging segment of the wireless revolution since it has to demonstrate a viable alternative to the cable modem and DSL technologies that are strongly entrenched in the last mile access environment. The Analysis, Research, and Consultancy (ARC) Group forecasts that the fixed wireless deployments in both homes and businesses will reach almost 28 million by 2005, with North America and Western Europe accounting for 24 percent and 27 percent of these, respectively. Whether the promise of BWA will materialize depends on its appeal to telecom operators from the perspective of deployment economics, where the critical factor is the ease of installation of broadband wireless subscriber units. This ultimately leads to nonprofessional installation of integrated all-indoor BWSUs. Consequently the physical layer (PHY) has to mitigate the very tough impairments that characterize these non-line-of-sight environments. In this context we overview the work of the one of the IEEE 802.16 standard subcommittee projects that deals with a BWA solution based on OFDM access (OFDMA) aiming at the most challenging NLOS scenarios.

Broadband communications

Abstract: From the Publisher: An updated,lower-priced paperback Signature Edition of the best-selling book that brought together N in one convenient resource N the many technologies that increase network capacity. Network pros can continue to rely on Kumar for in-depth coverage of the standards,services,and markets for DSL,ATM,Intelligent Networks,BISDN,and SONET. The Signature Edition also covers access architecture (FTTC,HFC,DBS,LMDS,MMDS); backbone architecture; ATM environment encompassing UNI and PNNI; specialized video (DBS) and wireless networks; CATV architecture; and the role of the Internet in the broadband environment. The complete reference to the exploding area of broadband communications. Broadband communications standards. . . services. . . architectures. . . markets. . . cutting-edge innovations. You'll discover everything there is to know about the subject in this definitive resource. Widely praised for completeness and clarity,it has now been expanded to keep you ahead of the curve on the latest developments and revolutionary technologies: access technologies,such as ADSL,HDSL,and X-DLS,Cable Modems,LMDS,MMDS,and Gigabit Ethernet - the missing pieces of end-to-end broadband communication,now included in this edition. Access architecture,including the various public access network options such as FTTC,HFC,DBS,and wireless that take advantage of the new access technologies Broadband Intelligent Network (IN),including potential ATM-based broadband IN architecture and its migration options to support broadband services Current and future ATM issues,addressing trends that affect LANs and WANs,as well as the next-generation photonic architectures suchas photonic switching and WDM Implication of the Internet and its role in enabling broadband are covered. You'll also find in-depth information on all available broadband communications - FDDI,DQDB,frame relay,SMDS,ATM,SONET,access technologies,and the BISDN architecture protocol layers - and data that helps you compare the strengths and weaknesses of each in real-world usage.