A terminal device (3, 4) for wireless communication, comprising: a wireless interface (25; 121, 122) configured for communication with a radio access network of a cellular communication network, the terminal device (3, 4) being configured to - transmit an announcement message indicating that the terminal device (3, 4) is capable of acting as a relay to at least one other terminal; - transmit, via the wireless interface (25; 121, 122), a message (43; 53; 70) to the at least one other terminal (2, 5), the message (43; 53; 70) including configuration information related to a relay function of the terminal device (3, 4), - receive, from a requesting terminal of the at least one other terminal (2, 5) and as direct communication, a request to activate the relay function, and - in response to receiving the request to activate the relay function: activate the relay function to start relaying communication between the requesting terminal of the at least one other terminal (2, 5) and the radio access network, characterized in that the terminal device is configured to transmit the announcement message prior to receiving the request for configuration information, wherein the terminal device (3, 4) is configured to transmit the message (43; 53; 70) which includes the configuration information as direct communication to respectively one other terminal (2, 5) of the at least one other terminal (2, 5), wherein the terminal device (3, 4) is configured to transmit the message (43; 53; 70) which includes the configuration information to the at least one other terminal (2, 5) in response to receiving a request (42; 52) for the configuration information from the at least one other terminal (2, 5). a wireless interface (25; 121, 122) configured for communication with a radio access network of a cellular communication network, the terminal device (3, 4) being configured to - transmit an announcement message indicating that the terminal device (3, 4) is capable of acting as a relay to at least one other terminal; - transmit, via the wireless interface (25; 121, 122), a message (43; 53; 70) to the at least one other terminal (2, 5), the message (43; 53; 70) including configuration information related to a relay function of the terminal device (3, 4), - receive, from a requesting terminal of the at least one other terminal (2, 5) and as direct communication, a request to activate the relay function, and - in response to receiving the request to activate the relay function: activate the relay function to start relaying communication between the requesting terminal of the at least one other terminal (2, 5) and the radio access network, characterized in that the terminal device is configured to transmit the announcement message prior to receiving the request for configuration information, wherein the terminal device (3, 4) is configured to transmit the message (43; 53; 70) which includes the configuration information as direct communication to respectively one other terminal (2, 5) of the at least one other terminal (2, 5), wherein the terminal device (3, 4) is configured to transmit the message (43; 53; 70) which includes the configuration information to the at least one other terminal (2, 5) in response to receiving a request (42; 52) for the configuration information from the at least one other terminal (2, 5). - transmit an announcement message indicating that the terminal device (3, 4) is capable of acting as a relay to at least one other terminal; - transmit, via the wireless interface (25; 121, 122), a message (43; 53; 70) to the at least one other terminal (2, 5), the message (43; 53; 70) including configuration information related to a relay function of the terminal device (3, 4), - receive, from a requesting terminal of the at least one other terminal (2, 5) and as direct communication, a request to activate the relay function, and - in response to receiving the request to activate the relay function: activate the relay function to start relaying communication between the requesting terminal of the at least one other terminal (2, 5) and the radio access network, characterized in that the terminal device is configured to transmit the announcement message prior to receiving the request for configuration information, wherein the terminal device (3, 4) is configured to transmit the message (43; 53; 70) which includes the configuration information as direct communication to respectively one other terminal (2, 5) of the at least one other terminal (2, 5),