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

By Martin Sauter

ISBN-10: 1118341481

ISBN-13: 9781118341483

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

This publication follows on from its winning predecessor with an creation to subsequent iteration community applied sciences, cellular units, voice and multimedia providers and the cellular internet 2.0.  Giving a valid technical advent to 3GPP instant structures, this e-book explains the selections taken in the course of standardization of the most well-liked instant community criteria this present day, LTE, LTE-Advanced and HSPA+.  It discusses how those components strongly impact one another and the way community features, on hand bandwidth, cellular machine functions and new program techniques will form the best way we converse within the future.  This moment variation provides a finished and broad-reaching exam of a fast-moving expertise in an effort to be a welcome replace for researchers and execs alike. 

Key features:

  • Fully up to date and elevated to incorporate new sections together with VoLTE, the evolution to 4G, cellular web entry, LTE-Advanced, wireless safety and backhaul for instant networks
  • Describes the profitable commercialization of net 2.0 providers comparable to fb, and the emergence of app shops, capsules 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 resources for 3G, 4G and Beyond: Bringing Networks, Devices and the Web Together

Sample text

While the content of the DTCH is given to higher layers of the protocol stack, which eventually extract a voice packet or an IP packet, the information transported in the control channel remains in the radio software stack and is not visible to higher-layer applications. When users move, they eventually leave the coverage area of a base station. While a DCH is established, the RNC takes care that the connection to the mobile device is transferred to a more suitable cell. This decision is based on reception quality of the current cell and the neighboring cells, which is measured by the mobile device and sent to the network.

The SGSN, however, only knows the current RNC responsible for forwarding the packet and not the cell identity. This knowledge is not necessary, as the SGSN just forwards the data packet to the RNC and the RNC is responsible for forwarding it via the current cell to the user. In addition the SGSN does not know if the radio connection to the mobile is in Cell-FACH, Cell-DCH, Cell-PCH, or URA-PCH state. This information is not necessary since it is the RNC’s task to decide in which state to keep the mobile based on the QoS requirements of a connection and the current amount of transmitted data.

For this purpose, an additional dedicated downlink channel has been created, the Enhanced HARQ information channel (E-HICH). Each HSUPA device gets its own E-HICH while it is in Cell-DCH mode. If an E-DCH connection is in soft handover state, each of the contributing base stations sends its own ACK for a frame to the mobile device. If only one ACK is positive, the transfer is seen as successful and the HARQ process moves on to the next frame. While it was decided to introduce a new modulation scheme for the downlink to further increase transmission speeds, it was shown with simulations that there would be no such effect for uplink transmissions.

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

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