A method, performed by a transmitting device, in a 3GPP wireless communication system connected to one or more first end stations, for handling generalized Precise Timing Protocol, gPTP, signaling, from a Time Sensitive Network, TSN, the method comprising: receiving, from a device in the 3GPP wireless communication system connected to one or more second end stations in the TSN network, a gPTP frame, wherein the gPTP frame comprises: - time information; and at least one of - an indication of a time domain related to the time information; - a Medium Access Control, MAC, address of the one or more second end stations connected to the receiving device; determining, based on the indication of the time domain and/or the MAC address, the receiving device to which the gPTP frame relates to; wherein the step of determining which receiving device the gPTP frame relates to comprises: obtaining information regarding the time domain related to the receiving device and/or one or more second end stations connected to the receiving device, by at least one of, a) receiving the information regarding the time domain from the receiving device, b) receiving a pre-configuration indicating which receiving devices are related to a specific time domain and c) receiving information from a TSN network controller, wherein the information comprises a receiving device identifier: - a UE identifier; or - a MAC address of the one or more second end stations, and wherein the step of determining comprises determining that the received gPTP frame relates to the receiving device when the indication of the time domain or the MAC address comprised in the gPTP frame corresponds to the obtained information regarding the time domain to which the receiving device and/or the one or more second end stations connected to the receiving device are related; transmitting, to the determined receiving device, the gPTP frame in a PDU session related to the determined receiving device. receiving, from a device in the 3GPP wireless communication system connected to one or more second end stations in the TSN network, a gPTP frame, wherein the gPTP frame comprises: - time information; and at least one of - an indication of a time domain related to the time information; - a Medium Access Control, MAC, address of the one or more second end stations connected to the receiving device; - time information; and at least one of - an indication of a time domain related to the time information; - a Medium Access Control, MAC, address of the one or more second end stations connected to the receiving device; determining, based on the indication of the time domain and/or the MAC address, the receiving device to which the gPTP frame relates to; wherein the step of determining which receiving device the gPTP frame relates to comprises: obtaining information regarding the time domain related to the receiving device and/or one or more second end stations connected to the receiving device, by at least one of, a) receiving the information regarding the time domain from the receiving device, b) receiving a pre-configuration indicating which receiving devices are related to a specific time domain and c) receiving information from a TSN network controller, wherein the information comprises a receiving device identifier: - a UE identifier; or - a MAC address of the one or more second end stations, and wherein the step of determining comprises determining that the received gPTP frame relates to the receiving device when the indication of the time domain or the MAC address comprised in the gPTP frame corresponds to the obtained information regarding the time domain to which the receiving device and/or the one or more second end stations connected to the receiving device are related; transmitting, to the determined receiving device, the gPTP frame in a PDU session related to the determined receiving device. obtaining information regarding the time domain related to the receiving device and/or one or more second end stations connected to the receiving device, by at least one of, a) receiving the information regarding the time domain from the receiving device, b) receiving a pre-configuration indicating which receiving devices are related to a specific time domain and c) receiving information from a TSN network controller, wherein the information comprises a receiving device identifier: - a UE identifier; or - a MAC address of the one or more second end stations, a) receiving the information regarding the time domain from the receiving device, b) receiving a pre-configuration indicating which receiving devices are related to a specific time domain and c) receiving information from a TSN network controller, wherein the information comprises a receiving device identifier: - a UE identifier; or - a MAC address of the one or more second end stations, - a UE identifier; or - a MAC address of the one or more second end stations, and wherein the step of determining comprises determining that the received gPTP frame relates to the receiving device when the indication of the time domain or the MAC address comprised in the gPTP frame corresponds to the obtained information regarding the time domain to which the receiving device and/or the one or more second end stations connected to the receiving device are related; transmitting, to the determined receiving device, the gPTP frame in a PDU session related to the determined receiving device.