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Download 3G, 4G and Beyond: Bringing Networks, Devices and the Web by Martin Sauter PDF

By Martin Sauter

Extensively up to date assessment of present and destiny community applied sciences, applications and devices 

This publication follows on from its winning predecessor with an creation to subsequent new release community applied sciences, cellular units, voice and multimedia prone and the cellular internet 2.0.  Giving a valid technical advent to 3GPP instant structures, this publication explains the selections taken in the course of standardization of the preferred instant community criteria this present day, LTE, LTE-Advanced and HSPA+.  It discusses how those parts strongly effect one another and the way community functions, to be had bandwidth, cellular equipment functions and new program thoughts will form the way in which we speak within the future.  This moment variation offers a finished and broad-reaching exam of a fast-moving expertise to be able to be a welcome replace for researchers and execs alike. 

Key features:

  • Fully up-to-date and extended to incorporate new sections together with VoLTE, the evolution to 4G, cellular net entry, LTE-Advanced, wireless protection and backhaul for instant networks
  • Describes the profitable commercialization of net 2.0 companies similar to fb, and the emergence of app shops, pills and smartphones
  • Examines the evolution of cellular units and working platforms, together with ARM and x86 structure and their program to voice-optimized and multimedia devices

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Extra info for 3G, 4G and Beyond: Bringing Networks, Devices and the Web Together

Sample text

UL HS-DPCCH gating (gating = switch off): when no data is being transmitted in either the uplink or downlink, the uplink control channel (UL DPCCH) for HSDPA is switched off. Periodically, it is switched on for a short time to transmit bursts to the network in order to maintain synchronization. This improves battery life for applications such as Web browsing. , allowing more simultaneous VoIP users). 11 shows the benefits of this approach. • F-DPCH (Fractionated Dedicated Physical Control Channel) gating: terminals in HSDPA active mode always receive a Dedicated Physical Channel in the downlink, in addition to high-speed shared channels, which carries power control information and Layer 3 radio resource (RRC) messages, for example, for handovers, channel modifications, and so on.

Some of them have already been introduced in life networks, which are mentioned accordingly. 1 64QAM Modulation in the Downlink One of the key parameters of a wireless system that is often cited in articles is the maximum transmission speed. 4 Mbit/s in the downlink direction, which translates to 10–11 Mbit/s in practice today under very good radio conditions. To increase transmission rates further, 3GPP Release 7 introduces 64QAM modulation in the downlink, which transmits six chips per transmission step compared with four chips with 16QAM.

Each spreading code represents a transmission of a different cell and the mobile combines the signals it receives from the different cells. In the uplink direction, the mobile device continues using only a single spreading code for a dedicated channel. All cells taking part in the soft handover are instructed by the RNC to decode the data sent with this code and forward it to the RNC. During soft handover, the RNC thus receives several copies of the user’s uplink data stream. This increases the likelihood that a packet is received correctly and does not have to be retransmitted.

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