TA transmission method and device

The embodiment of the invention provides a TA transmission method and device, and the method is applied to a candidate distribution unit DU, and comprises the steps: transmitting a first message to a target centralized unit CU; the first message is a message which adopts a real-time transmission mode and carries a time advance TA value corresponding to a target terminal in a first candidate cell; or the first message is a message which adopts a non-real-time transmission mode and carries the TA value corresponding to the target terminal in the specified candidate cell. According to the TA transmission method provided by the embodiment of the invention, in a real-time/non-real-time transmission mode, the TA value corresponding to each candidate cell calculated by the candidate DU is sent to the CU through the first message and is forwarded to the service DU, so that the service DU can obtain the TA values calculated by other candidate DUs and configure the TA values to the terminal, the signaling interaction b