By Mooi Choo Chuah, Qinqing Zhang

ISBN-10: 0387241523

ISBN-13: 9780387241524

Presentation of historical past fabric of instant communications, site visitors modeling and site visitors engineering concepts. offers descriptions of upcoming beneficial properties similar to IP multimedia subsystems, multimedia broadcast/multicast companies and Push-to-Talk over mobile (PoC) for 3G networks together with difficulties on the finish of every bankruptcy Written for teachers, graduate scholars and method designers

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MSCs are also connected with other MSCs via dedicated signaling channels (mostly via SS7 network) for the exchange of location, authentication, and call signaling information. The US cellular carriers use the IS-41 protocol [IS41] to allow MSCs of different service providers to pass information about their subscribers to other MSCs on demand. IS-41 relies on the autonomous registration feature of AMPS. A mobile uses autonomous registration to notify a serving MSC of its presence and location. , MIN and ESN, which allows the MSC to constantly update an entry in its database about the whereabouts of the mobile.

Connectionless services do not require a connection set up for the traffic but instead rely on packet-based transmissions. Packet switching is the most commonly used method to implement connectionless services. It allows many data users to remain virtually connected to the same physical channel in the network. A message can be broken into several packets, and each individual packet in a connectionless service is routed separately. Successive packets of the same message might travel completely different routes and encounter different delays throughout the network.

2 Packet Data Service Figure 2-10 shows an end-to-end protocol stack for packet data service for a UMTS system. In this example, we show how an end-to-end VPN tunnel can be created to carry a user's IP packets securely over the UMTS system. The IP packets generated by the user are encapsulated as PPP frames. The PPP frames are further encapsulated as PPTP [Ham99] protocol data units over the secured IP tunnels. The IP packets will be passed to a convergence layer (indicated as Packet Data Convergence Protocol (PDCP) in Figure 210).

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Design and Performance of 3G Wireless Networks and Wireless LANs by Mooi Choo Chuah, Qinqing Zhang


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