COMMUNICATION SYSTEM, PROVIDER NODE, COMMUNICATION NODE AND METHOD FOR PROVIDING A VIRTUAL NETWORK FUNCTION TO A CUSTOMER NODE
FIG5 represents a flowchart of a method for deactivating a virtual network function 
FIG5 shows a flowchart of a method for deactivating a virtual network function according to an embodiment of the invention. FIG5 additionally illustrates a distributed database 20, a customer node 200 and a communication system 100 with a provider node 110 and a communication node 130.
flowchart
502
In method step
130
communication node
100
communication system
508
In method step
20
distributed database
500
method
504
In method step
110
provider node
200
customer node
['1. A provider node (110) comprising: a retrieving module (112) adapted to retrieve a notification signal, the notification signal being indicative of a selected one of a plurality of virtual network functions and at least one customer node to which the selected virtual network function is to be provided; a validation module (114) adapted to establish service level agreement data, the service level agreement data at least representing a configuration of the selected virtual network function and the at least one customer node, and to validate the service agreement level data, based on the notification signal; and a deployment module (116) adapted to selectively transmit a deployment signal to a communication node depending on the validating of the service level agreement data for providing the selected virtual network function to the at least one customer node, the deployment signal being indicative of the at least one customer node, the selected virtual network function and its configuration.', '15. A method (300) for operating a customer node (200) for a data network (10), wherein the data network is adapted for providing a plurality of virtual network functions to the customer node by means of a communication system (100), the method comprising: - (310) selecting one of the plurality of virtual network functions as a selected virtual network function; - (312) reporting the selected virtual network function to a distributed database; and - (316) establishing a data communication via the selected virtual network function, when (314) it is provided by the communication system.']