Monday, November 12, 2012

Basic of GMSC Networking

  • Monday, November 12, 2012
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    • GMSC Networking

    The MSOFTX3000 supports various protocols such as the H.248, MAP, CAP, ISUP, and TUP. It provides abundant functions, such as:
    • Black and white list
    • Call authentication
    • Call intercept
    • Mass storage of CDRs
    When deployed with UMG8900, the MSOFTX3000 can function as the GMSC in the network.

    GMSC Networking

    MSC: Mobile Switching Center
    VLR: Visitor Location Register
    BC: Billing Center
    HLR: Home Location Register
    SCP: Service Control Point
    PSTN: Public Switched Telephone Network
    PLMN: Public Land Mobile Network

    The MSOFTX3000 terminates the signaling (such as the BICC) on the Nc interface with the other MSCs, and the call control ISUP/TUP signaling with the traditional external network (PSTN/PLMN). It realizes the route search for the called mobile subscriber and the number change between the mobile network and fixed network. Through the Mc interface, the MSOFTX3000 controls the bearer terminal (IP) at the core network side in the UMG8900 and the bearer terminal (TDM trunk) at the traditional fixed network side. In the GMSC networking, the MSOFTX3000provides the following interfaces:
    • MSOFTX3000 <-> UMG8900: Mc interface. It is the standard interface of the control layer and bearer layer in the core network. It adopts the extended H.248 protocol defined by the ITU-T. Through the Mc interface, the MSOFTX3000 controls the bearer resources at the trunk side. The interface is an IP-based interface added in the R4 stage.
    • MSOFTX3000 <-> MSC/MSC server: The MSOFTX3000 adopts the ISUP/BICC protocol for interworking with the MSC. When theMSOFTX3000 interworks with the MSC server, the interface is called the Nc interface. The Nc interface is the inter-office signaling interface in the control layer of the CS domain. It is an IP-based or TDM-based interface that adopts the ISUP or BICC protocol. It is added in the R4 stage.
    • MSOFTX3000 <-> PSTN/PLMN: It adopts the TUP or ISUP protocol. It sends and receives the call control messages between the mobile network of the local CS domain and the PSTN/PLMN. It is a TDM-based (MTP3) interface directly inherited from the R99 stage.
    • MSOFTX3000 <-> HLR: C/D interface. It adopts the MAP protocol, and is used to obtain the routing information for the called mobile subscriber from the PSTN/PLMN. It is a TDM-based or IP-based interface directly inherited from the R99 stage.
    • MSOFTX3000 <-> SCP: The interface adopts the CAP protocol, and provides the following functions:
      Realizing the standard connection between the SSP and SCP in the CS domain integrated in the MSOFTX3000
      Reporting the T-BCSM call state event, and executing commands of the SCP
      Thus, in the R4 stage, the intelligent services in the R99 and GSM stage can be realized in transparent mode. The interface is a TDM-based or IP-based interface directly inherited from the R99 stage.
    • MSOFTX3000<->BC: The interface adopts the FTP/FTAM protocol and enables the BC to automatically fetch the CDRs from the iGWB of theMSOFTX3000.
    • MSOFTX3000<->M2000: The interface adopts the MML protocol and supports the MSOFTX3000 to access the iManager M2000network management system.

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