IMS core network system supporting network selection of different field general terminal and calling method
A calling method and core network technology, applied in transmission systems, wireless communications, electrical components, etc., can solve problems such as inability to use general-purpose terminals, increase network performance requirements, and reduce efficiency, so as to avoid state changes, reduce requirements, and improve The effect of accuracy
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Embodiment 1
[0043] see figure 2 , including CS domain core network A, IMS domain core network B, CS domain core network A and IMS domain core network B are connected through MGCF / MGW B4, and foreign domain general terminal C is also included. The so-called general-purpose terminal in a foreign region means that the terminal C uses a 2nd generation SIM+ISIM composite card or a 3rd generation USIM+ISIM composite card. Under the same E.164 number, it can access the IMS domain and use the IMS service , and can access the CS domain to use the CS service, and may use the services of the two domains at the same time.
[0044] For example, when using the 2nd generation SIM+ISIM composite card, you can use all the 2nd generation CS domain and PS domain services by accessing the 2nd generation network, and you can also access the IMS domain through the 2nd generation GPRS to use non-real-time IMS services ( Such as instant messaging) and real-time IMS services (such as multimedia sessions); when ...
Embodiment 2
[0054] see Figure 4 , whose building blocks are the same as figure 2 The same as shown, the difference is that the HLR A2 and the HSSB2 are jointly installed to form an overall device D; the ENUM B3 interacts with the HLR A2 and the HSS B2 respectively, specifically, the ENUM B3 communicates with the integrated overall device D .
[0055] Since HLR A2 and HSS B2 are co-located and connected through an internal interface is the development trend of mobile communication network integration, therefore, the solution provided by this embodiment is more suitable for the integrated mobile communication system.
Embodiment 3
[0057] see Figure 4 , whose building blocks are the same as figure 2 The same as shown, the difference is that the HLR A2 communicates with the HSS B2, and the HLR A2 updates the registration status information of the CS domain terminal to the HSS B2.
[0058] Then the ENUM B3 interacts with the HLR A2 and the HSS B2 respectively, specifically, the ENUM B3 communicates with the HSS B2, and indirectly obtains the CS domain terminal registration status information provided by the HLR A2.
[0059] The solution provided by this embodiment does not require large-scale transformation of HLR and HSS equipment, and avoids the increase of system complexity caused by multiple connections between equipment. Only by setting the MAP interface in the HSS, the HSS and HLR can be realized. connect.
[0060] In the above-mentioned embodiment, when the general-purpose terminal C in a foreign region is used as the calling party, since it can actively select a network, it can meet the require...
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