Updating a background data transfer policy negotiated between an application function and a core network

A method of updating a background data transfer (BDT) policy negotiated between an application function (AF) and a Core Network (CN) of a telecommunication network, the method performed by the AF and comprising:

• receiving, from a Policy Control Function (PCF) in the CN, updated BDT policy information, wherein:
• the updated BDT policy information is based on the following:
• a current BDT policy between the AF and the CN being affected by degraded network performance, and
• a request by an Application Service Provider (ASP) associated with the current policy for a warning notification;
• and
• the updated BDT policy information comprises at least one of the following:
• at least one candidate BDT policy, and
• updated conditions for the negotiated BDT policy.

A Policy control Function (PCF) in a core network (CN) of a telecommunication network, the PCF arranged for updating a background data transfer (BDT) policy negotiated between an application function (AF) and the CN, the PCF comprising processing circuitry and communication interface circuitry configured to:

• in response to receiving a notification of degraded network performance of a network area, determine that the negotiated BDT policy is affected by the degraded network performance and an Application Service Provider (ASP) associated with the negotiated BDT policy requested a warning notification;
• determine, at least based on operator policies, updated BDT policy information for the negotiated BDT policy, wherein the updated BDT policy information comprises at least one of the following:
• at least one candidate BDT policy, and updated conditions for the negotiated BDT policy, and
• send the updated BDT policy information to the AF.

An Application Function (AF) configured to update a background data transfer (BDT) policy negotiated between the AF and a Core Network (CN) in a telecommunication network, the AF comprising processing circuitry and communication interface circuitry configured to:

• receive, from a Policy Control Function (PCF) in the CN, updated BDT policy information, wherein:
• the updated BDT policy information is based on the following:
• a current BDT policy between the AF and the CN being affected by degraded network performance, and
• a request by an Application Service Provider (ASP) associated with the current policy for a warning notification;
• and
• the updated BDT policy information comprises at least one of the following:
• at least one candidate BDT policy, and
• updated conditions for the negotiated BDT policy.