By Martin Sauter
Extensively up to date overview of present and destiny community applied sciences, applications and devices
This e-book follows on from its profitable predecessor with an advent to subsequent iteration community applied sciences, cellular units, voice and multimedia prone and the cellular internet 2.0. Giving a legitimate technical advent to 3GPP instant platforms, this e-book explains the choices 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 impression one another and the way community features, to be had bandwidth, cellular equipment features and new software thoughts will form the best way we converse within the future. This moment version offers a finished and broad-reaching exam of a fast-moving expertise that allows you to be a welcome replace for researchers and pros alike.
- Fully up-to-date and elevated to incorporate new sections together with VoLTE, the evolution to 4G, cellular web entry, LTE-Advanced, wireless protection and backhaul for instant networks
- Describes the winning commercialization of net 2.0 providers resembling fb, and the emergence of app shops, drugs 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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Additional info for 3G, 4G and Beyond: Bringing Networks, Devices and the Web Together
With HARQ, data frames with a fixed length of 2 ms have to be immediately acknowledged by the mobile device. If a negative acknowledgment (ACK) is sent, the packet can be repeated within 10 ms. The next data frame is only sent once the previous one has been positively confirmed. The mobile device must be able to handle up to eight simultaneous HARQ processes as the mobile device is allowed up to 5 ms to decode the packet before it has to send the ACK or the NACK (Negative Acknowledgment) to the network.
Beyond 3G Network Architectures 23 • Cell-DCH (Dedicated Channel) state — once the network decides to establish a voice or data connection, the mobile is instructed to use a dedicated channel and is therefore moved to the Cell-DCH State. If the device is HSPA-capable, the network selects a shared channel instead, as will be discussed in more detail below. From a RRC point of view, however, the mobile is still treated as being in Cell-DCH state. Round trip delay times in Cell-DCH state range from 160 ms with a dedicated bearer to 60 ms for an HSPA+ connection.
This will be discussed in more detail in Chapter 3. 10 16 Mbit/s data throughput with a HSPA+ category 14 device in a life network. Beyond 3G Network Architectures 35 from this measure, as the cell will have more time to transmit their data, because data for users closer to the cell center can be sent faster. Furthermore, 64QAM modulation is also beneficial for micro cell deployments in public places such as shopping malls, where users are close to small cells and therefore create little interference.
3G, 4G and Beyond: Bringing Networks, Devices and the Web Together by Martin Sauter