Radio communication system and communication method

A radio communication system comprising:

• user equipment;
• one or more call control apparatuses for performing call control;
• a plurality of Network Slice instances for processing user data;
• and
• a subscriber management apparatus,
• wherein the plurality of Network Slice instances is configured for a same data network, the same data network being different from a Radio Access Network (RAN),
• wherein the user equipment includes a first communication processor that transmits identifying information for identifying one Network Slice instance of the plurality of Network Slice instances and a communication destination identifier indicating the data network,
• wherein the one or more call control apparatuses include a second communication processor that transmits the communication destination identifier to the one Network Slice instance identified by the identifying information,
• wherein the one Network Slice instance includes a setting unit that establishes a communication path of user data between the data network indicated by the communication destination identifier and the user equipment,
• wherein the identifying information is different from the communication destination identifier,
• wherein the second communication processor obtains access information, the access information associating the identifying information with the communication destination identifier, from the subscriber management apparatus, and the second communication processor transmits the obtained access information to the user equipment,
• wherein the first communication processor determines, based on the obtained access information, the identifying information and the communication destination identifier indicating a destination of the user data, and
• wherein the access information includes the identifying information and a service identifier, the service identifier being different from the identifying information, and the communication path of the user data satisfies a requirement of a service identified by the service identifier.