Applying management constraints during network slice design

A node for providing least one Network Service (NS) to a Network Slice (NwS) during a design phase of the NwS based on a NwS Forwarding Graph (NwS FG) which comprises Network Functions (NFs) at a functional level, Virtual Network Functions (VNFs) and/or Physical Network Functions (PNFs) at a resource level, and embedding information for embedding the VNFs and/or PNFs (VNFs/PNFs) across more than one domain, the node comprising:

• a processing circuitry;
• and
• a memory containing instructions which, when executed by the processing circuitry cause the node to:
• determine, based on the NwS FG, Network Slice Subnets (NwSSs) for the NwS, wherein NFs comprising the NwS FG are grouped into respective groups to be managed by a respective NwSS manager, and
• map the NwSSs to NSs based on Network Function Virtualization Orchestrator (NFVO) assigned to a domain, wherein at least some of the VNFs/PNFs managed by respective NFVOs are mapped to sites across multiple domains determined by the embedding information, wherein the multiple domains comprise an administrative domain and at least one technology domain including one or more of a Radio Access Network (RAN) domain, a Transport Network (TN) domain and a Core Network (CN) domain.