In 4G network systems, it was near impossible to install new services in the network for a UE.
In the 5G network, the slice selection policy can be configured dynamically through URSP, while slice selection policy is pre-defined and cannot be changed dynamically in the 4G network. Through the URSP feature, 5G network operators can easily configure new service for a UE. So What is URSP feature?
Along with the concept of network slicing and features in the RAN and Core network, UE Route Selection Policy (URSP) is introduced as a way to manage network slice information for the UE. URSP is a network slice feature enabled by the PCF which informs the network slice status to the UE via the AMF.
Source: Samsung