Method for quickly establishing trunking service and related device and system

A method for quickly establishing a trunking service, the method comprising:

• sending, by a user equipment (UE) by using an evolved packet core network device, indication information that the UE has entered a trunking service mode to a base station device, the indication information is used to trigger the base station device to create a radio resource control connection with the UE, generate radio resource connection configuration information comprising a discontinuous reception cycle, and send the radio resource connection configuration information to the UE;
• receiving, by the UE, the radio resource connection configuration information that is sent by the base station device and comprises the discontinuous reception cycle, and configuring the discontinuous reception cycle as a discontinuous reception cycle of the UE itself;
• and
• when the UE is in the trunking service mode, retaining the radio resource control connection with the base station device according to the radio resource connection configuration information.

A base station device, comprising:

• a receiver, configured to receive indication information that a user equipment (UE) has entered a trunking service mode, wherein the indication information is sent by an evolved packet core network device;
• a processor, configured to create a radio resource control connection with the UE, in responding to the indication information, and configured to generate radio resource connection configuration information comprising a discontinuous reception cycle;
• a transmitter, configured to send the radio resource connection configuration information generated by the processor to the UE for determining the discontinuous reception cycle as a discontinuous reception cycle of the UE;
• and
• wherein the processor is further configured to:
• when the UE is in the trunking service mode, retain the radio resource control connection with the UE according to the radio resource connection configuration information.

A user equipment (UE), comprising:

• a transmitter, configured to send, by using an evolved packet core network device, indication information that the UE has entered a trunking service mode to a base station device, the indication information is used to trigger the base station device to create a radio resource control connection with the UE, generate radio resource connection configuration information comprising a discontinuous reception cycle, and send the radio resource connection configuration information to the UE;
• a receiver, configured to:
• after the transmitter sends, by using the evolved packet core network device, the indication information that the UE has entered the trunking service mode to the base station device, receive the radio resource connection configuration information that is sent by the base station device and comprises the discontinuous reception cycle;
• and
• a processor, configured to:
• configure the discontinuous reception cycle received by the receiver as a discontinuous reception cycle of the UE itself, and
• when the UE is in the trunking service mode, retain the radio resource control connection with the base station device according to the radio resource connection configuration information received by the receiver.