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Product Description

The 2G3G core network is logically divided into three domains: home network domain, service network domain, and transport network domain. The home network domain refers to the network where the customer opens an account. Network elements that provide services to customers or can provide services to customers are called service network domains. The transport network domain means that once a user roams, other operator networks are used to forward data packets to the home network. These networks are called transport network domains.

Core network element 1: (G) MSC mobile switching center, this equipment is used to make calls and send short messages. Preceded by G means that it can be used as an end office to make calls directly, or as a gateway office to connect with other operators, like a fixed network switch.

Core network element 2: HLR home location register. The home network needs to store some user service information and identity information, such as what services the customer has opened. These are all registered in this home location register. In addition, the verification of the user’s identity must be completed.

Core network element 3: GSN, including SGSN and GGSN, GPRS support node.

Core network element 4: SMSC short message service center. The main function is to receive short messages. Once the called party is turned on, the short message will be sent to the called party. For details, please refer to the SMSC product.

Core network element 5: SCF business control function, docking with the OCS billing center to complete smart services such as billing and recharge.

Product Specification

CapacityTraffic (BHCA):
·    Erlang: 2.5k
·    Local call: 60k
·    Outgoing call: 70k
·    Incoming call: 70k
·    Location update: 200k
·    CAMEL handling: 200k
·    Outgoing SM: 100k
·    Incoming SM: 100k
·    1023 trunks (1-127 trunk/trunks can be assigned to one trunk group)
·    1023 MG connections
InterfaceSCCP (ANSI T1.112, ITU-T Q)
·    ITU ISUP (ITU 92/97)
·    ANSI ISUP (ANSI T1.113-1995)
·    ITU ISDN (Q.931 05/98)
·    ANSI ISDN (NIS-A233-1)
A interface (ETSI, ANSI, IPA BSC):
·    BSSMAP: Manage the AIF circuit between MSC and BSC
·    DTAP: Implement mobility management, call control, supplementary service and SMS to mobile station
SSF (GSM 03.78, 03.18):
·    CAMEL interface on switch side
MAP 1,2,3 (ETSI, ANSI):
·    MAP B (to VLR)
·    MAP C (to HLR)
·    MAP D (VLR to HLR, for inter-PLMN roaming)
·    MAP F (to EIR)
·    MAP E (to SMSC)
SNMP V2 (RFC 1905): Heartbeat report, parameters maintenance, CDR, statistics
Soft switch:
– SCTP (RFC 2960): Provide efficient signaling transport over IP network between SG and MGC (MSC)
– M2UA (RFC 3331): Adaptation layer for transport of MTP2
– IUA (RFC 3057): Adaptation layer for transport of ISDN Q.921
– M3UA (RFC 3332): Adaptation layer for transport of MTP3
– MTP3 (ANSI, ITU, SCCP-Lite): Messages between the SG and the MGC
· MGCP (RFC 2705): Provide media gateway control function between the MG and MGC (MSC)
·    BICC (ITU-T Q): Provide call service between soft switches
·    RTP (RFC 1889): Real time transport of audio packets
·    SIP (RFC 3261)
·    H.248/MEGACO (RFC 3525, ITU-T H.248) interface to Iu UP Gateway
License ControlMSC application flag
8 to 1024 at multiples of eight trunks
Capacity1M subscribers
InterfaceMAP-C (HLR-MSC, SMSC)
CAMEL phase I, II, III
CAMEL (GSM 02.78, GSM 03.78, GSM 09 .78)O-CSI
License ControlHLR application flag
100 to 1 million HLR subscribers at multiples of one hundred
Capacity100k subscribers
License ControlVLR application flag
100 to 100k VLR subscribers at multiples of one hundred
AuC (Include in HLR)
Capacity1M subscribers
Triplet generation: 2000/s
License controlAUC application flag
100-1M AUC subscribers
EIR (Include in HLR)
Capacity100k grey/blacklists
1024 15-digit number segments of whitelists
License controlEIR application flag
100 to 100k EIR subscribers at multiples of one hundred