A relay node, a serving gateway, a relay transmission method and system data

The present invention provides a relay node, a serving gateway, a data transmission method and system of the relay, wherein the relay method for transmitting data comprising: a relay node between the gateway and the relay service via the relay radio access bearer the relay relay radio access bearer service to a terminal complete radio access bearer service. By the present invention, to achieve a relay node to relay data between the UE and the S-GW, to fill gaps in the prior art.