By Krzysztof Iniewski
The single source to hide instant, Wireline, and Optical Networks in a single VolumeMobile and desk bound next-generation networks that entry the photonic middle are destined to turn into as ubiquitous as conventional cellphone networks. those networks needs to successfully supply enough community caliber to multimedia functions with excessive bandwidth and strict quality-of-service standards, in addition to seamlessly combine cellular and glued architectures. contemporary engineering scholars needs to be safely ready to satisfy the demanding situations of next-generation community improvement and deployment.Featuring contributions from most sensible commercial specialists and educational professors, this authoritative paintings presents a complete creation to next-generation networks. It explains instant networks akin to instant neighborhood zone networks (WLAN), instant own quarter networks (WPAN), instant entry, 3G/4G mobile, and RF transmission, in addition to optical networks like long-haul and metropolitan networks, optical fiber, photonic units, and VLSI chips. instead of concentrating on heavy math or actual information, this source explores how the expertise is getting used. It describes entry and shipping community layer applied sciences whereas additionally discussing the community and prone aspects.Chapter insurance includes:Fiber–wireless networks: applied sciences, architectures, and destiny challengesPacket backhaul networkPoint-to-point microwave backhaulFourth-generation broadband: paving the line to Gbit/s with copperDynamic bandwidth allocation in EPON and GPONNext-generation ethernet passive optical networks: 10G-EPONPower line communications and shrewdpermanent gridsSignaling for multimedia conferencing in 4G: structure, review, and issuesSelf-coexistence and safeguard in cognitive radio networksMobile WiMAXUWB own region networks—MIMO extensionsNext-generation built-in metropolitan-access community: know-how integration and instant convergenceResilient burst ring: a singular know-how for the next-generation metropolitan zone networksFilled with illustrations and functional examples from undefined, this ebook should be important to engineers and researchers in and academia, in addition to senior undergraduate and graduate scholars, advertising and marketing and administration employees, photonics physicists, and chip designers.
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Extra resources for Convergence of Mobile and Stationary Next-Generation Networks
The concept requires computers to be out in the real world with people. In a society where this concept is actualized, these computers are embedded in many products/objects with sensors or actuators, but people are not aware of them. The computers calmly work and communicate with each other to offer a variety of services. The concept introduced in the 1980s is no longer only a dream. Recent developments in computer technologies as well as electronics and micromechanics enable us to make small, low-cost, low-power internal battery-powered sensor (actuator) nodes with computing functions.
The wireless access network consists of two network elements: an AP and a WT. They are connected by wireless links. The AP and WT both have three functions: physical layer interface (PHY), medium access control (MAC), and network control (CNT) functions. PHY provides wireless modulation/demodulation and transmission/reception functions. The MAC function is implemented to provide multiple access control for the wireless system, and it should support various levels of quality of service (QoS) for the ubiquitous network infrastructure.
Moreover, in each DLC connection, ARQ is executed to correct bit errors in the radio link and to maintain the communication quality. indd 37 7/22/2010 10:31:43 AM 38 WIDE-AREA UBIQUITOUS NETWORK random access. That is, the AP decides the backoff window size appropriate for each QoS class and notifies WTs through the RFCH. WTs then execute random access using the notified backoff window size when they try to transmit their user data. When the backoff window sizes are decided in the AP, a smaller window size is assigned to the QoS class with high priority and a bigger window size is assigned to the QoS class with low priority.