Method, User Equipment and System for Maintaining a Large Number of Connections

A system for maintaining a large number of connections, comprising a network device, a Machine Type Communication (MTC) server and a User Equipment (UE), wherein

• the network device is configured to, when there is no data transmission between the UE and a network, delete a radio bearer and reserve UE context information related to link restoration and a default bearer;
• the MTC server is configured to, when all reserved context information of the UE is lost and all bearers are deleted after a fault or a power failure occurs in the network device, or after the network side initiates a detach process to delete all context information of a large number of UEs and all the bearers because a large amount of UE information is not detected within a specified duration and when data needs to be transmitted to a group of the UEs, send trigger information to the UEs via the network device and establish connections between the MTC server and all the UEs;
• and
• the UE is configured to, after receiving the trigger information sent by the MTC server via the network device, establish a connection with the MTC server.