A method performed by an access and mobility management function, the method comprising: receiving, from a user equipment, a protocol data unit session establishment request message comprising Single Network Slice Selection Assistance Information or a data network name through an access network, wherein the Single Network Slice Selection Assistance Information or the data network name is subject to a capping number of protocol data unit sessions on a network slice associated with the Single Network Slice Selection Assistance Information or a data network associated with the data network name; upon detecting that the Single Network Slice Selection Assistance Information or the data network name is subject to the capping number of protocol data unit sessions per network slice or data network, transmitting a service request message to a policy control function, wherein the service request message includes an indication indicating that the Single Network Slice Selection Assistance Information or the data network name is subject to the capping number of protocol data unit sessions per network slice or data network, and wherein the indication relates to the enforcing at the policy control function the increment of a counter associated with protocol data unit sessions for a network slice associated with the Single Network Slice Selection Assistance Information or the data network associated with the data network name only in an instance where the network slice associated with the Single-Network Slice Selection Assistance Information or the data network associated with the data network name has not reached a maximum number of protocol data unit sessions for the Single Network Slice Selection Assistance Information or the data network name; receiving a service response from the policy control function; and transmitting a response to the protocol data unit session establishment request message to the user equipment. receiving, from a user equipment, a protocol data unit session establishment request message comprising Single Network Slice Selection Assistance Information or a data network name through an access network, wherein the Single Network Slice Selection Assistance Information or the data network name is subject to a capping number of protocol data unit sessions on a network slice associated with the Single Network Slice Selection Assistance Information or a data network associated with the data network name; upon detecting that the Single Network Slice Selection Assistance Information or the data network name is subject to the capping number of protocol data unit sessions per network slice or data network, transmitting a service request message to a policy control function, wherein the service request message includes an indication indicating that the Single Network Slice Selection Assistance Information or the data network name is subject to the capping number of protocol data unit sessions per network slice or data network, and wherein the indication relates to the enforcing at the policy control function the increment of a counter associated with protocol data unit sessions for a network slice associated with the Single Network Slice Selection Assistance Information or the data network associated with the data network name only in an instance where the network slice associated with the Single-Network Slice Selection Assistance Information or the data network associated with the data network name has not reached a maximum number of protocol data unit sessions for the Single Network Slice Selection Assistance Information or the data network name; receiving a service response from the policy control function; and transmitting a response to the protocol data unit session establishment request message to the user equipment.