Abstract: An access and mobility management function, AMF, entity receives an initial registration request from a communication device and transmits, responsive thereto, a network function, NF, discovery request to a network function repository function, NRF, entity, the NF discovery request including a communication device identifier and an NF type identifier. The NRF entity matches the communication device identifier with one of a plurality of communication device identifier ranges configured by the NRF entity, extracts a group identifier, groupId, configured for the one of the plurality of communication device identifier ranges, builds a list of registered NF profiles matching the NF type identifier and registered with the groupId, and transmits the list of registered NF profiles including the groupId and a NRF mapping indication to the AMF entity.

Abstract: A system for debugging an application program includes a debugging execution unit operated under an operating-system-free environment. The debugging execution unit includes a communication channel, a target processor unit for executing the application program and a first debugging program, and an interrupt vector swapper. The first debugging program includes a first set of input/output procedures for handling debugging communications over the communication channel, and the application program includes a second set of input/output procedures for handling communications over the communication channel associated with execution of the application program. Interrupt signals are generated when the target processor unit receives communications from the host processor unit. The target processor unit communicates with a host processor unit via the communication channel both when executing the application program and when executing the first debugging program.