Beyond 3G. Bringing Networks, Terminals and the Web Together by Martin Sauter

By Martin Sauter

Giving a legitimate technical creation to 3GPP LTE and SAE, this booklet explains the choices taken in the course of standardization whereas additionally studying the most likely festival for LTE reminiscent of HSPA+ and WiMAX. in addition to taking a look at subsequent new release community applied sciences, past 3G - Bringing Networks, Terminals and the net jointly describes the newest cellular equipment advancements, voice and multimedia companies and the cellular internet 2.0. It considers not just how the structures, units and software program paintings but in addition the explanations at the back of why they're designed during this specific means. How those components strongly effect one another is mentioned in addition to how community services, to be had bandwidth, cellular equipment features and new software strategies will form the way in which we speak sooner or later. This publication provides an finish to finish advent to instant, from cellular software program structure to center networks, making it a important source for an individual operating within the industry.•Examines present and next-generation community applied sciences akin to UMTS, HSPA+, WiMAX, LTE and Wifi•Analyses and explains functionality and potential in perform in addition to destiny ability requisites and the way they are often fulfilled•Introduces the reader to the present mobile telephony structure and to voice over IP architectures resembling SIP, IMS and TISPAN•Looks at cellular gadget and cellular working approach evolution•Encompasses all significant worldwide instant criteria for software improvement and the most recent country of the cellular net 2.0

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In this example, the uplink and downlink data are collected and distributed by two RNCs. However, only one of the two RNCs, referred to as the Serving-RNC (S-RNC), communicates with the core network. The other RNC, referred to as the Drift-RNC (D-RNC), communicates with the S-RNC. If the user moves further into the area covered by NodeB 2 and NodeB 3, the mobile will at some point lose contact with NodeB 1. 5 Soft handover with several RNCs. ) controlling NodeB 1 is no longer required. The current S-RNC then requests the SGSN to promote the current Drift-RNC as the new Serving RNC.

In addition, the RNC sends control information to the device via a Dedicated Control Channel (DCCH). This channel is not shared between subscribers. It is also possible for the user to establish or receive a voice call during an ongoing HSDPA data transfer. In this case, the RNC additionally uses a dedicated traffic channel to forward the circuit-switched voice channel to the user. At the base station (NodeB), data arriving via the HS-DSCH channel is buffered for a short while and then transmitted over one or several High-speed Physical Beyond 3G Network Architectures RNC 33 DTCH DCCH DTCH* HS-DSCH DCH Logical Channels Transport Channels NodeB Physical Channels UE ...

G. a cell change command) and for the uplink direction of an ongoing voice call. Finally, the mobile needs to send control information (reception quality of the downlink dedicated channel) to the NodeB. 3 Higher Order Modulation To further increase transmission speeds, HSDPA introduces a higher order modulation scheme to improve throughput for devices that receive the transmissions of the base station with a good signal quality. Basic UMTS uses Quadrature Phase Shift Keying (QPSK) modulation, which encodes two basic information elements (chips) per transmission step.

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