The gprs network is a network based on the existing GSM network; the GSM network is a global mobile communication system. It is necessary to add a node to the existing GSM network, such as the gateway GPRS support node and the service GPRS support node. , GSN is the most important network node in the GPRS network. GSN has mobile routing management functions. It can not only connect to various types of data networks, but also connect to GPRS registers.
The operating environment of this tutorial: Windows 10 system, Dell G3 computer.
The network is implemented based on the existing GSM network
The GPRS network is implemented based on the existing GSM network of. It is necessary to add a node to the existing GSM network, such as GGSN (Gateway GPRS Supporting Node, gateway GPRS support node) and SGSN (ServinGSN, service GPRS support node). GSN is the most important network node in the GPRS network. GSN has mobile routing management functions. It can not only connect to various types of data networks, but also connect to GPRS registers. GSN can complete data transmission and format conversion between mobile stations and various data networks. GSN can be either an independent device similar to a router or integrated with the MSC in GSM.
There are two types of GSN: one is ServingGSN (SGSN) and the other is Gateway GSN (Gateway GSN, GGSN). The main function of the SGSN is to record the current location information of the mobile station and complete the sending and receiving of mobile packet data between the mobile station and the GGSN. GGSN mainly functions as a gateway. It can connect to a variety of different data networks, such as ISDN, PSPDN and LAN. GGSN is also known as GPRS router. (GGSN can perform protocol conversion on GPRS packets in the GSM network, so that these packets can be transmitted to the remote
TCP/IP or X.25 network. In addition, some manufacturers have proposed The concept of GR (GSMRegister, GPRS database). GR is similar to ILR in GSM and is a GPRS business database. It can exist independently or coexist with HLR, and is implemented by a server or a program-controlled switch.
Extended knowledge: GSM network
GSM network is the abbreviation of Global System for Mobile Communications. Chinese is Global System for Mobile Communications, commonly known as "Global Communication". It is a mobile communication technology standard originated in Europe. The second generation mobile communication technology was developed to allow all parts of the world to use a mobile phone network standard. It is the world's first cellular system network that specifies digital modulation, network layer structure and services.
GSM was developed to solve the fragmentation of the first-generation cellular systems in Europe. Before GSM, European countries adopted different cellular standards across the continent. For users, they could not use one standard. Mobile stations communicate throughout Europe. In addition, due to the weaknesses of the analog network itself, its capacity is also limited. For this reason, the European Telecommunications Union began to develop a mobile communication system covering all of Europe in the early 1980s, which was called A system called GSM.
The GSM network is a network that adopts hierarchical control. A GSM network is divided into three network subsystems.
Network switching subsystem (NSS); base station subsystem ( BSS), the mobile station (MS) is also a subsystem but is usually considered to be part of the BSS; Network Management Subsystem (NMS).
In this network structure, the interface between the MS and the BSS is called the air interface ;The interface between BSS and NSS is called A interface; the interface between BSS, NSS and NMS is called operation and maintenance interface. Today's GSM standard only defines two open interfaces: air interface and A interface.
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