Question: Describe UMTS technology with a neat block diagram.
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Subject : Mobile Communication

Topic : 3G Communication System

Difficulty : Medium

mobile communication • 798 views
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modified 7 months ago by gravatar for Ankit Pandey Ankit Pandey70 written 8 months ago by gravatar for rajeshree.kumbhar5018 rajeshree.kumbhar501810
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Fig 1 shows UMTS Network architecture.as showed in fig UMTS uses some elements of the GSM architecture.

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The Mobile Station (MS) is user equipment (UE). Function of MSC is same as that in GSM.
SGSN & GGSN are the gateways used to connect with other network (PSTN,PLMN,INTERNET) with speed upto 2 MBPS.
The core n/w elements are connected to radio n/w through Iu interface.
The Radio Access n/w (RAN) called as Terrestrial Radio Access N/W (UTRAN) Iur interface connects Radio n/w controllers. Base stations are connected to RNC through the Iub interface

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Fig-2 The UMTS interface diagram
The UMTS interfaces as shown in Fig.2 are described as follows :
1. Uu : It is the interface between the network and the user equipment. It is similar to the Um interface in GSM network.
2 Iu _ CS : It is similar to the A interface in GSM networks .It represents a circuit switched connection for carrying signaling and voce traffic between the core voice network and UTRAN. RANAP is the signaling protocol used.
3 Iu _ PS :It is similar to the Gb interface in GSM networks. It represents a packet switched connection for carrying signaling and voice traffic between the core voice network and UTRAN. RANAP is the signaling protocol used.
4.Iub _ This interface is used for controlling many Node B. NBAP is the signaling protocol used.It is similar to the Abis interface in GSM networks.
5.Iur _This interface is used for supporting mobility of MSCs. When subscriber moves. Iur transfers subscriber data to new RNC as he moves. RNSAP is the signaling protocol used.

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written 8 months ago by gravatar for rajeshree.kumbhar5018 rajeshree.kumbhar501810
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