The software structure of the CG9812 includes several service processes. The service processes consists of the kernel process, BS process, access point process, operation and maintenance process, cluster process, and parameter configuration process. Each process contains various independent service thread modules. The CG9812 is a multi-process and multi-thread system in the client/server structure. The CG9812 software sets a thread module for each independent service. Then the thread modules with similar service functions form a process. In this way, the software is in the multi-process and multi-thread structure. The communications between processes use the mature client/server mode. In this mode, one process serves as the core, and the others serve as sub-processes. This allows a core process to dispatch and monitor other sub-processes. Figure 1 shows the software structure of the CG9812. Figure 1 Software structure
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Except the parameter configuration process, each process contains a management module and a message relay module. Kernel Process As the core of the CG9812 software, the kernel process is the TCP/IP server of the access point process, O&M process. It starts, stops, and monitors the access point process, and O&M process. Access Point Process The access point process integrates the key service functions of the CG9812. The functions involve CDR receiving, CDR processing, and CDR storage. The modules performing these service functions are the network module, frontsave module, CDR process module, and backsave module. These four modules form a unidirectional CDR processing process, as shown in Figure 2. Figure 2 Access point process
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The functions provided by each module are as follows: - Network module
It uses GTP to receive original CDRs to avoid repetition or loss of CDRs. - Frontsave module
It stores the CDRs that are received by the nework module. - CDR processing module
It sorts CDRs, converts the format of CDRs, and generates and sends final CDRs to the backsave module. - Backsave module
It stores final CDRs in different channels, generates final CDR files, and provides them for the BS. Cluster Process The cluster process is used to start and manage the kernel process. Parameter Configuration Process The parameter configuration process is the parameter configuration module of the CG9812. The CG9812 provides the function of configuring parameters remotely through the GUI of the Parameter Config Console. Operation and Maintenance Process The operation and maintenance process integrates the operatability and maintainability functions of the CG9812. According to the functions, these service modules are classified into the log module, backup module, CDR browsing and querying module, MML server module, performance module, and alarm module. The modules are relatively independent from each other. | 
