A computer readable storage medium having instructions stored thereon which, when executed by a node in a telecommunication network, cause registration of a service, the telecommunication network having a Service Based Architecture, SBA, the telecommunication network having a Service Collection Function, SCF, comprising a plurality of distinct SBA services and comprising a Collection Controller, CoC, for registering and discovering the plurality of distinct SBA services within the SCF, the telecommunication network further comprising a Network Repository Function, NRF, for registering and discovering services within the telecommunication network, the registration comprising:
- receiving, from one of the distinct SBA services, a registration message for registering a service;
- determining that the service is to be provided within said SCF only;
- refraining from forwarding the registration message to the NRF based on the determination;
- and
- registering the service for discovering the service by any of the plurality of distinct SBA services within the SCF.