Policy node, user plane node, control plane node and methods therein for handling quality of service in a wireless communications network

A policy node configured to handle Quality of Service, QoS, for data traffic between a User Equipment, UE, and an Application Server, AS, node associated with the UE in a wireless communications network, the policy node further being configured to:

• receive from a control plane node serving the UE, a first message adapted to comprise having information indicating one or more available marking types, which a user plane node is capable of detecting in the data traffic;
• receive from the AS node, a second message having information indicating a number of marking types supported by both the UE and the AS node, a UE identifier identifying the UE and a list of QoS profiles associated with the UE;
• decide a marking type and a marking value for each of the QoS profiles based on the information of the first message and the second message;
• transmit in a third message to the AS node, the decided marking type and marking value for each of the QoS profiles;
• receive from the control plane node, a fourth message having a session establishment request with a UE identifier identifying the UE, which session establishment request is adapted to be related to data traffic between the UE) and the AS node;
• determine the decided marking type and marking value for each of the QoS profiles associated with the UE identifier;
• and
• transmit towards the control plane node, a fifth message having a session establishment response for the UE identifier including the marking type and marking value decided for each QoS profile associated with the UE identifier.

A user plane node, configured to handle Quality of Service, QoS, for data traffic between a User Equipment, UE, and an Application Server, AS, node associated with the UE in a wireless communications network, the user plane node further being configured to:

• transmit towards a control plane node, a first message having information indicating one or more available marking types which the user plane node is capable of detecting in the data traffic;
• receive from the control plane node, a sixth message having information partly based on the first message and indicating one or more Packet Detection Rules, PDR, with respective marking type and marking value and, per PDR, a QoS enforcement rule, QER, with QoS parameters for a corresponding QoS profile;
• associate each marking type and marking value with the corresponding QoS profile, based on the sixth message;
• receive, from at least one of the UE and AS node, data traffic indicating a marking type and marked with a marking value to indicate a QoS to be applied;
• detect the marking value for the marking type in the data traffic;
• determine a corresponding QoS profile associated with the detected marking type and marking value;
• and
• enforce the determined corresponding QoS profile for the data traffic between the UE and the AS node.

A control plane node, configured to handle Quality of Service, QoS, for data traffic between a User Equipment, UE, and an Application Server, AS, node associated with the UE in a wireless communications network, the control plane node further being configured to:

• receive from a user plane node, a first message having information indicating one or more available marking types, which the user plane node is capable of detecting in the data traffic;
• transmit towards a policy node the first message having information indicating the one or more available marking types;
• transmit towards the policy node, a fourth message having a session establishment request with a UE identifier identifying the UE, which session establishment request is adapted to relate to the data traffic between the UE and the AS node;
• receive from the policy node, a fifth message having a session establishment response for the UE identifier including a marking type and marking value decided for each QoS profile associated with the UE identifier, partly based on the information in the first message;
• and
• transmit towards the user plane node, a sixth message having information indicating one or more Packet Detection Rules, PDR, with respective marking type and marking value and, per PDR, a QoS Enforcement Rule, QER, with QoS parameters for a corresponding QoS profile based on the information of the fifth message.