Transmission method and device

A transmission method comprising:

• obtaining, by a second device, first data and identification information, wherein the first data is to be sent to a network device, the identification information is identification information of a second relay node, and the second device is the second relay node or a terminal device;
• sending, by the second device, a first radio resource control (RRC) message to a first device, wherein the first RRC message comprises the first data and the identification information, and the first device is a first relay node that accesses a donor eNB;
• and
• sending, by the first device, the first data and the identification information to the donor eNB of the first device by using a second RRC message, wherein before the sending, by the first device, the first data and the identification information to the donor eNB of the first device by using a second RRC message, determining, by the first device based on the identification information, the donor eNB of the first device corresponding to the identification information.

A transmission device comprising:

• a processor;
• a memory;
• a receiver;
• and
• a transmitter;
• wherein,
• the memory is configured to store a software program;
• the receiver is configured to receive a first radio resource control (RRC) message sent by a second device, wherein the first RRC message comprises first data and identification information, the first data is to be sent to a network device, the transmission device is a first device, the first device is a first relay node that accesses a donor eNB, the second device is a second relay node or a terminal device, the second device accesses the first device, and the identification information is identification information of the second relay node;
• and
• the transmitter is configured to send the first data and the identification information that are received by the receiver to the donor eNB of the first device by using a second RRC message, wherein the processor is configured to:
• before the transmitter sends the first data and the identification information that are received by the receiver to the donor eNB of the first device by using the second RRC message, determine, based on the identification information received by the receiver, the donor eNB of the first device corresponding to the identification information.

A transmission device comprising:

• a transmitter;
• and
• a processor, wherein,
• the processor is configured to obtain first data and identification information, wherein the first data is to be sent to a network device, the identification information is identification information of a second relay node, and the transmission device is the second relay node;
• and
• the transmitter is configured to send a first radio resource control (RRC) message to a first device, wherein the first RRC message comprises the first data and the identification information that are obtained by the processor, and the first device is a relay node that accesses a donor eNB, by sending, by the first device, the first data and the identification information to the donor eNB of the first device by using a second RRC message, wherein before the sending, by the first device, the first data and the identification information to the donor eNB of the first device by using the second RRC message, the first device determines based on the identification information, the donor eNB of the first device corresponding to the identification information.

A communications system comprising:

• a first device;
• a second device;
• and
• a donor eNB, wherein the first device is a first relay node that accesses the donor eNB, and the second device is a second relay node,
• wherein, the second device obtains first data and identification information, wherein the first data is to be sent to a network device, the identification information is identification information of the second relay node, and the second device sends a first radio resource control (RRC) message to the first device, wherein the first RRC message comprises the first data and the identification information, and
• wherein, the first device receives the first RRC message sent by the second device, and sends the first data and the identification information to the donor eNB of the first device by using a second RRC message, wherein before the sending, by the first device, the first data and the identification information to the donor eNB of the first device by using a second RRC message, determining, by the first device based on the identification information, the donor eNB of the first device corresponding to the identification information.