Technique for preparing user equipment mobility

A method for implementing User Equipment, UE, mobility from a 4G network to a 2G/3G network for a UE moving from a 5G network to the 2G/3G network via the 4G network, the method being performed by the UE after the UE has moved from the 5G network to the 4G network and, the method comprising:

• receiving, for each of one or more bearers, one or more 2G/3G Quality of Service, QoS, parameters from a network node as part of an update bearer procedure for the respective bearer and using the one or more 2G/3G QoS parameters to hand over the respective bearer to the 2G/3G network when the UE moves from the 4G network to the 2G/3G network.

(canceled)

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A network node for preparing User Equipment, UE, mobility from a 4G network to a 2G/3G network for a UE moving from a 5G network to the 2G/3G network via the 4G network, the network node being configured to after the UE has moved from the 5G network to the 4G network:

• trigger, for each of one or more bearers handed over from the 5G network to the 4G network for the UE, an update bearer procedure to provide one or more 2G/3G Quality of Service, QoS, parameters to the UE required to hand over the respective bearer to the 2G/3G network when the UE moves from the 4G network to the 2G/3G network.

A User Equipment, UE, for implementing UE mobility from a 4G network to a 2G/3G network, the UE moving from a 5G network to the 2G/3G network via the 4G network, the UE being configured to after the UE has moved from the 5G network to the 4G network:

• receive, for each of one or more bearers, one or more 2G/3G Quality of Service, QoS, parameters from a network node as part of an update bearer procedure for the respective bearer and using the one or more 2G/3G QoS parameters to hand over the respective bearer to the 2G/3G network when the UE moves from the 4G network to the 2G/3G network.

(canceled)