Cellular mobile communication services include 900/ 1800MHzGSM second generation digital cellular mobile communication services, 800MHzCDMA second generation digital cellular mobile communication services and third generation digital cellular mobile communication services.
900/ 1800MHzGSM second generation
Digital cellular mobile communication service 900/ 1800MHzGSM second generation digital cellular mobile communication (GSM mobile communication for short) service refers to the voice and data services provided by GSM mobile communication network working in 900/ 1800MHz frequency band. The wireless interface of GSM mobile communication system adopts TDMA technology, and the mobility management protocol of core network adopts MAP protocol.
900/ 1800MHzGSM second-generation digital cellular mobile communication service includes the following main service types:
End-to-end bidirectional voice service
Mobile short message service refers to the short message service initiated and received by mobile stations provided by GSM network and short message platform.
Mobile bearer service and its mobile data service.
Mobile supplementary services, such as calling number display and call forwarding services.
Mobile intelligent network services provided by GSM network and intelligent network, such as prepaid service.
Domestic roaming and international roaming services.
Operators of 900/ 1800MHzGSM second-generation digital cellular mobile communication services must set up their own GSM mobile communication network, and the types of mobile communication services provided can be part or all. The network providing mobile communication services can be the network of the same operator or the networks of different operators. To provide international communication services for mobile networks, international communication entrances and exits approved by the state are needed.
800MHzCDMA second generation
Digital cellular mobile communication service 800MHzCDMA second generation digital cellular mobile communication (CDMA mobile communication for short) service refers to the voice and data services provided by CDMA mobile communication network working in 800MHz frequency band. The wireless interface of CDMA mobile communication adopts narrowband CDMA technology, and the mobility management protocol of core network adopts IS4 1 protocol.
800MHzCDMA second generation digital cellular mobile communication service includes the following main service types:
(1) end-to-end two-way voice service.
(2) Mobile message service is a message service initiated and received by mobile stations provided by CDMA networks and message platforms.
(3) Mobile bearer service and its mobile data service.
(4) Mobile supplementary services, such as calling number display and call forwarding services.
Mobile intelligent network services provided by CDMA networks and intelligent networks, such as prepaid services.
(6) Domestic roaming and international roaming services.
Operators of 800MHzCDMA second-generation digital cellular mobile communication services must set up their own CDMA mobile communication network, and the types of mobile communication services provided can be partial or all. The network providing mobile communication services can be the network of the same operator or the networks of different operators. To provide international communication services for mobile networks, international communication entrances and exits approved by the state are needed.
The Third Generation Digital Cellular Mobile Communication Service
The third generation digital cellular mobile communication (3G mobile communication for short) refers to the voice, data, video and image services provided by the third generation mobile communication network.
The main feature of the third generation digital cellular mobile communication service is that it can provide mobile broadband multimedia services, in which the rate of 144kb/s is supported in high-speed mobile environment, the rate of 384kb/s in walking and slow mobile environment, the data transmission rate of 2Mb/s in indoor environment, and the high and reliable service quality is guaranteed. The third generation digital cellular mobile communication service includes all the service types and mobile multimedia services that the second generation cellular mobile communication can provide.
Operators of the third generation digital cellular mobile communication services must establish their own 3G mobile communication networks, and the types of mobile communication services provided can be partial or all. The network providing mobile communication services can be the network facilities of the same operator, or it can be completed by the network facilities of different operators. To provide international communication services for mobile networks, international communication entrances and exits approved by the state are needed.