Functions of the SMS System

This section describes the functions of the SMSC.

The functions of the SMSC are as follows:

• Providing value-added services (VASs) and obtaining profits
  As a basic telecom service of the mobile communication network, the SMS enables subscribers to transmit information through SMs and obtain such useful information as stock market, weather, sports and bank information, which greatly facilitates subscribers in getting information and gets subscribers into a better and closer relationship with operators. At the same time, operators can get direct revenue by providing VASs based on the SMS service.
  
  
• Improving quality of service (QoS)
  Mobile subscribers have high requirements for timely information transfer. In many cases such as channel busy, masking or network coverage problems, communication is difficult and information cannot be exchanged. With the SMSC, subscribers can get information at the earliest time and smooth information transmission is ensured.
  
  
• Improving connectivity and reducing congestion of the mobile network
  According to statistics, over 30% of calls or faxes cannot be charged due to busy line or no reply, resulting in the waste of network resources. As a solution to this problem, the SMSC can connect incoming calls manually or automatically and record the information subscribers want to transmit, thus dredging the GSM network. In addition, the SMSC can reduce false load which is caused by repetitive dialing to an MS switched off, thus reducing network congestion.