Method for selection of a network slice

A method for:

• selection of a network slice by a user equipment operating in a cellular network, said network comprising at least two network slices, a plurality of base stations, and at least one network mobility unit, said user equipment being configured to camp on one of the base stations and to maintain a list of preferred network services, and operating a base station of the plurality of base stations of said cellular network, the base station being configured to serve a plurality of user equipments camping on said base station,
• said user equipment setting up a preferred network service from said list of preferred network services, comprising:
• sending a network slice selection message indicating a quality of service value relating to the preferred network service to a serving base station,
• sending an attach request via the serving base station to the at least one network mobility unit, for attaching to a selected network service on a corresponding network slice,
• receiving from at least one of the plurality of base stations signalling from said base station indicating a set of quality of service values supported by at least one of the base stations,
• determining from the set of quality of service values at least one supported network service for respective base stations,
• prioritizing the respective base stations by means of said determined at least one supported network service in consideration of at least one out of the list of preferred network services,
• selecting said base station considering said prioritization,
• wherein in conjunction with receiving of the set of quality of service values receiving power consumption ratings affecting at least one frequency indication represented by the set of quality of service values, and the step of prioritizing also comprises considering said power consumption rating,
• wherein in case the selected network service is due not before a predetermined time period,
• selecting one of the base stations considering said prioritization and power consumption values for operating in idle mode,
• selecting one of other base station considering said prioritization and said power consumption values for attaching to said selected network service, within said predetermined time period;
• operating the base station of said cellular network comprising:
• receiving said network slice selection message from said user equipment indicating said quality of service relating to said preferred network service preferred by the user equipment,
• upon receiving said attach request from said user equipment, setting up the preferred network service on a network slice corresponding to said preferred network service.

A system for operating in a cellular network comprising at least two network slices, a plurality of base stations, and at least one network mobility unit, the system comprising:

• a base station of the plurality of base stations, the base station comprising communication circuitry, at least one memory unit and processing circuitry, the base station being configured for:
• signalling to at least one of camping user equipments a set of quality of service values supported by the base station,
• receiving a network slice selection message from one of the camping user equipments indicating a quality of service relating to a network service preferred by the user equipment,
• upon receiving an attach request from said user equipment, set up the network service on a network slice corresponding to said network service,
• maintain a list of requested network services occurrences, and
• increment said network service occurrences in case of receiving an attach request for said network service,
• wherein the set of quality of service values to be signaled only comprises a limited number of quality of service values which relate to a predetermined number of network services corresponding to said list of requested network service occurrences with highest usage;
• an user equipment comprising communication circuitry, at least one memory unit and processing circuitry, the user equipment being configured to camp on one of the base stations to:
• receive from at least one of the plurality of base stations said signalling indicating the set of quality of service values supported by the base station,
• determine from the set of quality of service values at least one supported network service for respective base stations,
• prioritize said respective base stations by means of said determined at least one supported network service in consideration of at least one out of a list of preferred network services,
• select one of the respective base stations considering said prioritization.