A method for time sensitive network, TSN, operation, comprising: in the case of data traffic stoppage in a communication channel of TSN due to at least one of down time of a user plane, UP, connection and a reset of the UP connection, performing the following: generating, by a user plane function, UPF, an audit report about the at least one of the down time and the reset; sending, by the UPF, the audit report to a first element in control plane, CP, without waiting for any communication from the CP, characterized in that: the first element in the CP is a session management function, SMF; a second element in the CP is an application function, AF; the method further comprising the steps of: sending the audit report along with a report type indicating one of i) down time of the UP connection due to connection fluctuation, or ii) down time of the UP connection due to a switch-over of the UP connection from a primary user plane function, UPF, to a back-up UPF; and determining, by one of the first element or the second element in the CP whether the down time of the UP connection exceeds a survival time of the communication channel, wherein: in the case the down time of the UP connection is due to the switch-over of the UP connection from the primary user plane function, UPF, to the back-up UPF, the audit report is sent by the back-up UPF; in the case the report type indicates down time of the UP connection due to connection fluctuation, the audit report includes at least one of the following information: operation status, IP address: display name; interface name; virtual routing and forwards, VRF; virtual local area network, VLAN; physical address; protocol type; start time for TSN session; previous down time; and duration of down time; in the case the report type indicates down time of the UP connection due to the switch-over of the UP connection from the primary user plane function, UPF, to the back-up UPF, the audit report includes at least one of the following information: operation status, IP address: display name; interface name; virtual routing and forwards, VRF; virtual local area network, VLAN; old physical address; new physical address; protocol type; start time for TSN session; previous down time; and duration of down time. generating, by a user plane function, UPF, an audit report about the at least one of the down time and the reset; sending, by the UPF, the audit report to a first element in control plane, CP, without waiting for any communication from the CP, characterized in that: the first element in the CP is a session management function, SMF; a second element in the CP is an application function, AF; the method further comprising the steps of: sending the audit report along with a report type indicating one of i) down time of the UP connection due to connection fluctuation, or ii) down time of the UP connection due to a switch-over of the UP connection from a primary user plane function, UPF, to a back-up UPF; and determining, by one of the first element or the second element in the CP whether the down time of the UP connection exceeds a survival time of the communication channel, the first element in the CP is a session management function, SMF; a second element in the CP is an application function, AF; the method further comprising the steps of: sending the audit report along with a report type indicating one of i) down time of the UP connection due to connection fluctuation, or ii) down time of the UP connection due to a switch-over of the UP connection from a primary user plane function, UPF, to a back-up UPF; and determining, by one of the first element or the second element in the CP whether the down time of the UP connection exceeds a survival time of the communication channel, sending the audit report along with a report type indicating one of i) down time of the UP connection due to connection fluctuation, or ii) down time of the UP connection due to a switch-over of the UP connection from a primary user plane function, UPF, to a back-up UPF; and determining, by one of the first element or the second element in the CP whether the down time of the UP connection exceeds a survival time of the communication channel, in the case the down time of the UP connection is due to the switch-over of the UP connection from the primary user plane function, UPF, to the back-up UPF, the audit report is sent by the back-up UPF; in the case the report type indicates down time of the UP connection due to connection fluctuation, the audit report includes at least one of the following information: operation status, IP address: display name; interface name; virtual routing and forwards, VRF; virtual local area network, VLAN; physical address; protocol type; start time for TSN session; previous down time; and duration of down time; in the case the report type indicates down time of the UP connection due to the switch-over of the UP connection from the primary user plane function, UPF, to the back-up UPF, the audit report includes at least one of the following information: operation status, IP address: display name; interface name; virtual routing and forwards, VRF; virtual local area network, VLAN; old physical address; new physical address; protocol type; start time for TSN session; previous down time; and duration of down time.