Data transmission method, apparatus, and system

A data transmission method, comprising:

• receiving, by a non-cellular access device, non-cellular access device addition request information from a cellular access device, wherein the non-cellular access device addition request information is used to instruct the non-cellular access device to allocate a resource of a non-cellular network for a terminal, the non-cellular access device addition request information comprises a to-be-added-bearer list, and the to-be-added-bearer list comprises a data radio bearer identifier, DRB ID;
• sending, by the non-cellular access device, non-cellular access device addition response information to the cellular access device, wherein the non-cellular access device addition response information comprises a tunnel endpoint allocated for a bearer to which data of the terminal belongs, the tunnel endpoint comprises a tunnel endpoint identifier, TED, and a transport layer address, and the tunnel endpoint is used to indicate a data transmission destination in a downlink data transmission path;
• and,
• receiving, by the non-cellular access device, uplink data from the terminal, the uplink data comprises a long term evolution wireless local area network aggregation adaptation protocol protocol data unit, LWAAP PDU, the LWAAP PDU comprises the DRB ID.

An apparatus, comprising a transmitter and a receiver, wherein:

• the transmitter is configured to send non-cellular access device addition request information to a non-cellular access device, wherein the non-cellular access device addition request information is used to instruct the non-cellular access device to allocate a resource of a non-cellular network for a terminal, the non-cellular access device addition request information comprises a to-be-added-bearer list, and the to-be-added-bearer list comprises a data radio bearer identifier, DRB ID;
• the receiver is configured to receive non-cellular access device addition response information from the non-cellular access device, wherein the non-cellular access device addition response information comprises a tunnel endpoint allocated for a bearer to which data of the terminal belongs, the tunnel endpoint comprises a tunnel endpoint identifier, TEID, and a transport layer address, and the tunnel endpoint is used to indicate a data transmission destination in a downlink data transmission path;
• and,
• the receiver is configured to receive uplink data, through the non-cellular access device, from the terminal, the uplink data comprises a long term evolution wireless local area network aggregation adaptation protocol protocol data unit, LWAAP PDU, the LWAAP PDU comprises the DRB ID.

An apparatus, comprising a receiver and a transmitter, wherein:

• the receiver is configured to receive non-cellular access device addition request information from a cellular access device, wherein the non-cellular access device addition request information is used to instruct the non-cellular access device to allocate a resource of a non-cellular network for a terminal, the non-cellular access device addition request information comprises a to-be-added-bearer list, and the to-be-added-bearer list comprises a data radio bearer identifier, DRB ID;
• the transmitter is configured to send non-cellular access device addition response information to the cellular access device, wherein the non-cellular access device addition response information comprises a tunnel endpoint allocated for a bearer to which data of the terminal belongs, the tunnel endpoint comprises a tunnel endpoint identifier, TED, and a transport layer address, and the tunnel endpoint is used to indicate a data transmission destination in a downlink data transmission path;
• and,
• the receiver is configured to receive uplink data from the terminal, the uplink data comprises a long term evolution wireless local area network aggregation adaptation protocol protocol data unit, LWAAP PDU, the LWAAP PDU comprises the DRB ID.