By Martin Sauter
Giving a valid technical advent to 3GPP LTE and SAE, this e-book explains the selections taken in the course of standardization whereas additionally reading the most likely festival for LTE equivalent to HSPA+ and WiMAX. in addition to taking a look at subsequent new release community applied sciences, past 3G - Bringing Networks, Terminals and the internet jointly describes the most recent cellular gadget advancements, voice and multimedia providers and the cellular internet 2.0. It considers not just how the platforms, units and software program paintings but in addition the explanations in the back of why they're designed during this specific method. How those parts strongly effect one another is mentioned in addition to how community features, to be had bandwidth, cellular equipment features and new software ideas will form the way in which we converse sooner or later. This e-book 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 corresponding to UMTS, HSPA+, WiMAX, LTE and Wifi•Analyses and explains functionality and potential in perform in addition to destiny means necessities and the way they are often fulfilled•Introduces the reader to the present mobile telephony structure and to voice over IP architectures similar to SIP, IMS and TISPAN•Looks at cellular gadget and cellular working procedure evolution•Encompasses all significant international instant criteria for software improvement and the most recent kingdom of the cellular internet 2.0
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Extra info for Beyond 3G. Bringing Networks, Terminals and the Web Together
Afterwards, the GPRS Tunneling Protocol (GTP) encapsulates the original IP packet. Here, the source and destination address represent the subscriber and a host on the Internet such as a Web server. In addition to tunneling, the GGSN is also responsible for assigning IP addresses to subscribers. 3 Encapsulated IP packet in a packet-switched core network. Beyond 3G Network Architectures 23 tunnel and an assignment of an IP address from the GGSN. The GGSN then assigns an IP address from a pool and establishes the tunnel.
Note that PMM Connected state is also entered for short periods of time during signaling exchanges such as a location update even if no IP connection is established. If the RNC sets the radio connection to Idle state, it also informs the SGSN that the mobile is no longer directly reachable. The SGSN then modifies its control state to PMM Beyond 3G Network Architectures 31 Idle. For the SGSN this means that, if an IP packet arrives from the Internet later on, the mobile device has to be paged first.
An alternative transmission technology that overcomes the limitations of a narrow band and was already well understood at the end 24 Beyond 3G – Bringing Networks, Terminals and the Web Together of the 1990s, when work on UMTS started, was Code Division Multiple Access (CDMA). Instead of a narrow channel bandwidth of 200 kHz as in GSM, the Wideband CDMA (W-CDMA) channel used in UMTS has a bandwidth of 5 MHz. Furthermore, instead of assigning timeslots, all users communicate with the base station at the same time but using a different code.