Signalling to support delayed service availability

An apparatus comprising:

• at least one processor;
• and
• at least one memory including computer program code;
• the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform:
• transmitting a request to establish a service to a base station;
• receiving an acknowledgment comprising information indicating an extended time interval in response to the base station determining that the extended time interval is needed to successfully complete the request, wherein determining comprises:
• determining that congestion is present in a network including the base station,
• determining that additional resources are necessary to service the request, and
• calculating a time required to identify the additional resources and migrate the service in network function virtualization (NFV) architecture based on virtualization technique and size of application;
• and
• configuring a timer to start and run for a default time in response to transmission of the request, wherein the timer is modified in response to receiving the information indicating the extended time interval.