Relaying user communication device enabling rrc, nas connections, user communication device, base station, system, method, and non-transitory computer readable medium storing a program

A user communication device in a wireless communication system, the user communication device comprising:

• a transceiver configured to communicate with another user communication device and with a base station, wherein the transceiver is configured to:
• communicate with another user communication device over a first interface;
• communicate with the base station over a second interface;
• receive system information block (SIB) message to establish a ProSe communication link,
• transmit a message for initiating provision of the ProSe communication link, the message comprising at least one of a ProSe Layer 2 Group ID and a ProSe UE ID,
• wherein the ProSe UE ID is identifier of the another user communication device as an destination node,
• wherein the ProSe Layer 2 Group ID is identifier for group communication related to a plurality of destination nodes;
• and
• relay data, for the another user communication device, via the first interface and the second interface, using the ProSe communication link.

A method performed by user communication device configured to communicate with another user communication device over a first interface and to communicate with the base station over a second interface, the method comprising:

• receiving system information block (SIB) message to establish a ProSe communication link,
• transmitting a message for initiating provision of the ProSe communication link, the message comprising at least one of a ProSe Layer 2 Group ID and a ProSe UE ID,
• wherein the ProSe UE ID is identifier of the another user communication device as an destination node,
• wherein the ProSe Layer 2 Group ID is identifier for group communication related to a plurality of destination nodes;
• and
• relaying data, for the another user communication device, via the first interface and the second interface, using the ProSe communication link.