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Download Rab Nawaz Jadoon  Nawaz Jadoon Assistant Professor COMSATS IIT, Abbottabad Pakistan Mobile Communication. Department of Computer Science UMTS Architecture

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  • Department of Computer Science

    DCS

    COMSATS Institute of

    Information Technology

    Cellular Systems - II

    Rab Nawaz JadoonAssistant Professor

    COMSATS IIT, Abbottabad

    Pakistan

    Mobile Communication

  • Department of Computer Science

    UMTS Architecture

    A UMTS network consist of three interacting domains;

    Core Network (CN)

    UMTS Terrestrial Radio Access Network (UTRAN)

    User Equipment (UE)

    The main function of the core network is to provide switching, routing and transit for user traffic.

    Core network also contains the databases and network management functions.

    2

  • Department of Computer Science

    Cont

    The basic Core Network architecture for UMTS is based on GSM network with GPRS.

    All equipment has to be modified for UMTS operation and services.

    The UTRAN provides the air interface access method for User Equipment.

    Base Station is referred as Node-B

    Control Equipment for Node-B's is called Radio Network Controller (RNC).

    3

  • Department of Computer Science

    Cont

    Here is the list of system areas from largest to smallest.

    UMTS systems (including satellite)

    Public Land Mobile Network (PLMN)

    MSC/VLR or SGSN

    Location Area

    Routing Area (PS domain)

    UTRAN Registration Area

    (PS domain)Cell

    4

  • Department of Computer Science

    Conceptual Network Model (UMTS)

    5

  • Department of Computer Science

    Cont

    RNS (Radio Network Subsystem)

    UTRAN

    Node B

    RNC

    6

    Node B

    RNC

  • Department of Computer Science

    What is UTRAN???

    The UMTS Terrestrial Radio Access Network (UTRAN) is the fixed network infrastructure that contains the facilities for the transmission to and from the mobile users over radio.

    The components of the UTRAN are the,

    Base stations, which are called Node B in UMTS, and

    Control nodes, which are called Radio Network Controller (RNC). The Radio Network Controllers are connected to the Core Network

    (CN).

    7

  • Department of Computer Science

    UTRAN

    8

  • Department of Computer Science

    Node B

    The functions of Node B are,

    Air interface Transmission / Reception

    Modulation / Demodulation

    CDMA Physical Channel coding

    Micro Diversity

    Error Handing

    Closed loop power control

    9

  • Department of Computer Science

    Node B

    An important task of a node B is the inner loop power control to mitigate near-far effects.

    This node also measures connection qualities and signal strengths.

    A node B can even support a special case of handover, a so-called softer handover which takes place between different antennas of the same node B.

    10

  • Department of Computer Science

    RNC --- Radio Network Controller

    The functions of RNC are:

    Radio Resource Control

    Admission Control

    Channel Allocation

    Power Control Settings

    Handover Control

    Macro Diversity

    Ciphering

    Segmentation / Reassembly

    Broadcast Signaling

    Open Loop Power Control

    11

  • Department of Computer Science

    Micro Diversity --- Soft Handover

    12

  • Department of Computer Science

    Macro Diversity --- Soft Handover

    13

  • Department of Computer Science

    E-RAN

    GERAN without GSM is ERAN.

    A GERAN without EDGE is a GRAN

    14

  • Department of Computer Science

    3GPP-R99 Architecture

    15

  • Department of Computer Science

    UMTS Core Network--- Overview

    16

    UMTS core network together with a 3G RNS and a 2G BSS

  • Department of Computer Science

    UMTS Core Network--- Overview

    The circuit switched domain (CSD)

    comprises the classical circuit switched services including signaling.

    Resources are reserved at connection setup and the GSM components MSC, GMSC, and VLR are used.

    The CSD connects to the RNS via a part of the Iuinterface called IuCS.

    The CSD components can still be part of a classical GSM network connected to a BSS but need additional functionalities (new protocols etc.)

    17

  • Department of Computer Science

    Cont

    The packet switched domain (PSD)

    uses the GPRS components SGSN and GGSN and connects to the RNS via the IuPS part of the Iuinterface.

    Both domains need the data-bases EIR for equipment identification and HLR for location management (including the AuC for authentication and GR for user specific GPRS data).

    18

  • Department of Computer Science

    Real Motivation

    Reusing the existing infrastructure helps to save a lot of money and may convince many operators to use UMTS if they already use GSM.

    The UMTS industry pushes their technology with the help of the market dominance of GSM.

    This is basically the same as cdma2000, which is a evolution of cdmaOne.

    The real flexible core network comes with releases 5 and 6, where the GSM circuit switched part is being replaced by an all-IP core.

    19

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    Release 4

    20

    Originally called the Release 2000 - added features including an all-IP Core Network

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    Release 5

    21

    Introduced IMS and HSDPA

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    3GPP - Release 5

    HSDPA (High-Speed Downlink Packet Access)

    HSDPA is a packet-based mobile telephony protocol used in 3G UMTS radio networks to increase data capacity and speed up transfer rates.

    HSDPA, which evolved from the WCDMA standard, provides download speeds at least five times faster than earlier versions of UMTS.

    HSPDA specifies data transfer speeds of up to 14.4 Mbps per cell for downloads and

    2 Mbps per cell for uploads.

    As of 2013 HSDPA deployments can support down-link speeds of up to 99.3 Mbps

    22

  • Department of Computer Science

    3GPP Release 6 HSUPA and MBMS

    High-Speed Uplink Packet Access (HSUPA) is a 3G mobile telephony protocol in the HSPA family with up-link speeds up to 5.76 Mbit/s.

    The name HSUPA was created by Nokia.

    The official 3GPP name for 'HSUPA' is Enhanced Uplink (EUL).

    MBMS

    Multimedia Broadcast Multicast services (MBMS) is a point-to-multipoint interface specification

    which is designed to provide efficient delivery of broadcast and multicast services, both within a cell as well as within the core network, for Example Mobile TV

    23

  • Department of Computer Science

    3GPP Release 7

    HSPA +, MIMO (HOM etc)

    HSPA+, or Evolved High-Speed Packet Access, is a technical standard for wireless, broadband telecommunication.

    HSPA+ provides an evolution of High Speed Packet Access and provides data rates up to 168 Mbps for downlink and

    22 Mbps from the mobile device (uplink).

    Technically these are achieved through the use of a multiple-antenna technique known as MIMO (for "multiple-input and multiple-output).

    Dual Cell HSDPA (DC-HSDPA), known also as Dual Carrier, is the natural evolution of HSPA by means of carrier aggregation in the downlink.

    24

  • Department of Computer Science

    Comparison(R99, R4, R5)

    25

  • Department of Computer Science 26

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