Simplified Network

Building efficient, intelligent, and open 5G Cloud & Network

2G/3G/4G/5G/IMS Signaling Convergence

ZXUN DSC integrates multiple logical network functions such as DRA, STP, SCP, BSF, SEPP, NRF, NSSF, and DNS, reducing the quantity of NFs, and greatly simplifying signaling networking of carriers. It supports Diameter/No.7/HTTP signaling access and interconnection of the 2G/3G/4G/5G/IMS networks, and supports session binding, NF service management, slice management, and routing addressing in the 3GPP architecture.

As the role of DRA/SLF, ZXUN DSC processes diameter signaling and queries HSS address; 

As the role of STP/MNP, ZXUN DSC processes No.7 signaling and queries HLR address; 

As the role of SCP, ZXUN DSC processes HTTP signaling; 

As the role of BSF, ZXUN DSC supports the 5GC policy session binding scenarios; 

As the role of SEPP, ZXUN DSC supports the 5GC border routing scenarios;

As the role of NRF, ZXUN DSC supports NF management, NF discovery and NF OAuth, to help 5GC NFs & services realize plug and play;

As the role of NSSF, ZXUN DSC supports network slice selection, NSSAI availability, to help end user enjoy the slice-level application;

As the role of DNS, ZXUN DSC supports multiple DNS query types such as A, AAAA, SRV, NAPTR and S-NAPTR, and multiple DNS query modes such as recursive query and iterative query, to Implement NE domain name resolution and addressing.

Products Advantages

Advanced Architecture
On-demand Deployment
Excellent Interoperability


Applicable to 2G/3G/4G/5G/IMS

Easy O&M

Elastic Scaling
Automatic O&M

Latest Function

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Major Function

  • Diameter Routing Function

    Diameter routing function includes routing based on application ID and realm name, incoming peer ID, host name, command code subscriber ID (IMSI, MSISDN, PUI, PVI),etc.

  • Diameter Signaling Screening Function

    Interworking of Diameter signaling networks constructed by different carriers facilitates service cooperation but also incurs network attacks through illegal signaling. The carriers need to screen illegal requests in Diameter signaling to make the Diameter signaling network more secure and reliable. Diameter signaling screening screens illegal request messages in Diameter signaling to enhance security and reliability of the Diameter signaling network.

  • SS7 Routing Function

    SS7 routing function includes: routing on MTP3/M3UA layer, routing on SCCP layer, routing on MAP layer.

  • SS7 Signaling Screening Function

    Similar to Diameter Signaling Screening, SS7 signaling screening screens illegal request messages in SS7 signaling to enhance security and reliability of the SS7 signaling network. SS7 Signaling Screening includes: screening on MTP3/M3UA layer, screening on SCCP layer, screening on MAP layer.

  • MNP

    Mobile Number Portability is a service that enables subscribers to retain their existing numbers when they switch from one operator to another. MNP NE provides the query of subscriber home operator and HLR according to its subscriber number.

  • IWF

    In the development of network, the stage of different network is always different. e.g. the network of operator A is 3G, the network of operator B is 4G. When different networks need to interwork, interworking equipment is needed to translate the different signaling between different networks.

  • SCP

    By deploying an SCP, signaling links can be converged between NFs, simplifying the network architecture and reducing the number of links between NFs.

    • Indirect communication: message forwarding and routing to destination NF/NF service; 
    • Mode C: The NF performs service discovery, and the SCP forwards the signaling routes; 
    • Mode D: The NF no longer discovers services. The SCP is responsible for the agent service discovery and signaling route forwarding.
  • BSF

    BSF (Binding Support Function) implements the PDU session binding function for 5G users. In BSF, each PDU session stores the session binding information including user ID, DNN, UE address (IP address or MAC address), and PCF address selected by SMF. It provides the PCF address query service for AF or NEF to ensure that the AF can identify the UE's service based on the UE address, so that the N5/Rx interface messages can be routed to the corresponding PCF for the PDU session of the UE.

  • SEPP

    SEPP provides the following functions for 5G signaling protection: 

    • As a non-transparent agent, SEPP forwards signaling between VPLMN and HPLMN (N32 interface); 
    • Between SEPPs, mutual authentication and key negotiation, and secure transmission of signaling messages;
    • Filtering signaling messages, screening illegal signaling messages, and checking anti-fraud at the application layer and IP layer;
    • Topology hiding to restrict the internal topology to be visible to the outside.
  • NRF

    • Providing functions such as NF registration, NF update and NF subscription/notification, to achieve automation NF management in the 5GC SBA; 
    • Providing NF and service dynamic discovery services for local NFs and roaming NFs; 
    • Providing an oAuth2-based authorization mechanism to prevent illegal NF access to the network and ensure network security of the communication between NFs.
  • NSSF

    • Providing information such as allowed NSSAI, configured NSSAI and target AMF set to the initial AMF to assist AMF to implement re-allocation; 
    • Providing the NRF ID and NSI ID to AMF, to assist AMF to select SMF in local/roaming scenarios; 
    • Providing TA-based NSSAI availability management and supporting subscription, unsubscription, update, notification and deletion for NSSAI-related availability information.
  • DNS

    Providing the mobile network Gn/Gp DNS function and supporting multiple query methods such as recursive query and iterative query.

Related Resources