FIELD: communication.
SUBSTANCE: invention relates to the field of communication technologies, namely to a method for subscription to services and a device. The first network element of a network function transmits the first message to the second element of the network function to subscribe to the first service the third network element of the network function in the second network element of the network function, where the first message contains the first address, and the first address is an address of the first network element of the network function. The first network element of the network function receives the third message, using the first address, and finds out, based on the third message, that the first service was changed. According to this method, the first network element of the network function transmits the address of the first network element of the network function to the second network element of the network function. Therefore, when the first service is changed, the first network element of the network function can receive a notification. Thus, a mechanism for information about a change in a service is improved, so a procedure of subscription to services can be relatively completed, and no interrupt is called.
EFFECT: provision of a mechanism allowing a service provider to inform a service subscriber about a change in the service.
82 cl, 10 dwg
