By Martin Sauter(auth.)
Extensively up to date evaluate of present and destiny community applied sciences, applications and devices
This ebook follows on from its profitable predecessor with an creation to subsequent new release community applied sciences, cellular units, voice and multimedia providers and the cellular net 2.0. Giving a valid technical creation to 3GPP instant platforms, this booklet explains the choices 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 effect one another and the way community functions, on hand bandwidth, cellular gadget services and new software thoughts will form the best way we speak within the future. This moment variation offers a finished and broad-reaching exam of a fast-moving know-how on the way to be a welcome replace for researchers and execs alike.
- Fully up-to-date and extended to incorporate new sections together with VoLTE, the evolution to 4G, cellular net entry, LTE-Advanced, wireless defense and backhaul for instant networks
- Describes the profitable commercialization of internet 2.0 prone reminiscent of 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
Chapter 1 Evolution from 2G over 3G to 4G (pages 1–7):
Chapter 2 past 3G community Architectures (pages 09–93):
Chapter three community potential and utilization situations (pages 95–148):
Chapter four Voice over instant (pages 149–239):
Chapter five Evolution of cellular units and working structures (pages 241–296):
Chapter 6 cellular net 2.0, Apps, and vendors (pages 297–356):
Chapter 7 end (pages 357–360):
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Extra info for 3G, 4G and Beyond-Bringing Networks, Devices and the Web Together, Second Edition
7 shows how user data is transferred through the radio network and which channels an HSDPA device has to decode simultaneously while it is in Cell-DCH state. At the RNC, the user’s data packets arrive from the core network in a DTCH. From there, the RNC repackages the data into a single High-speed Dedicated Shared Channel (DSCH) and forwards it to the NodeB. In addition, the RNC sends control information to the device via a 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.
Details are given in Chapter 3. 36 3G, 4G and Beyond–Bringing Networks, Devices and the Web Together As uplink transmissions are usually power limited, MIMO has only been considered for the downlink direction. 4 16QAM Modulation and Dual-Carrier Operation in the Uplink In the uplink direction, no changes were made to the modulation scheme in 3GPP Release 6. Despite earlier predictions that uplink transmissions would not benefit from a higher modulation and coding scheme, 3GPP has reconsidered its position and Release 7 then introduced 16QAM.
This way, all devices can still transmit their data to the base station at the same time while their maximum transmission speeds can be quickly adjusted as necessary. Staying with the dedicated channel concept and hence allowing all mobile devices to transmit at the same time has the additional benefit of shorter packet delay times compared with an approach where devices have to wait for their timeslot to transmit. Optionally, a second control channel, the Enhanced Relative Grant Channel (E-RGCH) can be used to quickly increase or decrease uplink transmission power step by step.
3G, 4G and Beyond-Bringing Networks, Devices and the Web Together, Second Edition by Martin Sauter(auth.)