Relay transmission method and device
摘要
說明書
For convenient description, in the following examples, there is made such a hypothesis that a cellular network has established a Packet Data Network (PDN) connection and a bearer for remote terminal equipment and such a hypothesis that the remote terminal equipment is specifically remote UE, relay terminal equipment is specifically relay UE, network equipment is specifically an eNB and a layer-2 PDU of a PC5 interface and a layer-2 PDU of a Uu interface are both MAC PDUs. It is to be understood that, if layer 2 of the remote terminal equipment includes an ADP layer and the PC5 interface adopts another D2D communication technology different from an SL technology of LTE, the PDU of the PC5 interface may be a PDU of layer 2 corresponding to the other D2D communication technology. However, the embodiment of the disclosure is not limited thereto.
In S310, when receiving data sent by the remote terminal equipment, a P-GW sends the data to an eNB through a GTP-U of an S1-U interface allocated in a bearer establishment process.
In S320, after receiving the data of the remote terminal equipment from the GTP-U, the eNB encapsulates the data into a MAC PDU of a Uu interface. Here, a MAC CE in the MAC PDU of the Uu interface contains a layer-2 identifier or terminal equipment identifier of the remote terminal equipment.
