RRC message transmission method and apparatus, terminal device, and access network device

A radio resource control (RRC) message transmission apparatus, comprising:

• a transceiver, configured to receive first configuration information sent by a first access network device by using a first transmission path, wherein the first configuration information comprises multipath configuration information and a first trigger condition, the multipath configuration information comprises configuration information of a plurality of second transmission paths, each second transmission path comprises a transmission link between a terminal device and one second access network device and an interface link between the first access network device and the second access network device, and a second access network device on one second transmission path is different from a second access network device on another second transmission path;
• and
• a processor, configured to:
• when a radio link between the terminal device and the first access network device meets the first trigger condition, activate the multipath configuration information, and control the transceiver to transmit a same RRC message to the first access network device by using the first transmission path and at least one second target transmission path in the plurality of second transmission paths, wherein the RRC message is generated by the terminal device.

A radio resource control (RRC) message transmission apparatus, comprising:

• a processor, configured to determine first configuration information, wherein the first configuration information comprises multipath configuration information and a first trigger condition, the multipath configuration information comprises configuration information of a plurality of second transmission paths, each second transmission path comprises a transmission link between a terminal device and one second access network device and an interface link between a first access network device and the second access network device, and a second access network device on one second transmission path is different from a second access network device on another second transmission path;
• and
• a transceiver, configured to send the first configuration information to the terminal device by using a first transmission path, wherein
• the transceiver is further configured to:
• receive an RRC message transmitted by the terminal device by using the first transmission path, and receive the same RRC message transmitted by at least one second target access network device by using at least one target interface link, wherein the RRC message is generated by the terminal device, and the RRC message is sent by the terminal device when it is determined that a radio link between the terminal device and the first access network device meets the first trigger condition.