Method, base station and mobile station for timeslot selection and timeslot assignment

A mobile station in a wireless packet transmission system where said mobile station communicates with a base station, said mobile station comprising:

• means for obtaining a propagation loss of a received signal in said mobile station based on a transmission power of said base station and a received power of said received signal received from said base station;
• means for receiving an occupation state and an interference amount of an uplink timeslot from said base station;
• means for obtaining a desired wave power of said base station from a transmission power of said mobile station and from said propagation loss;
• means for obtaining a ratio between said desired wave power and said interference amount in said base station for said uplink timeslot in which said occupation state is idle;
• and
• means for selecting an idle timeslot, as a transmission timeslot, which has the lowest ratio between said desired wave power and said interference amount among idle timeslots each of which idle timeslots satisfies a predetermined ratio between desired wave power and said interference amount.

A base station in a wireless packet transmission system where said base station communicates with a mobile station, said base station comprising:

• means for measuring an occupation state and an interference amount of an uplink timeslot;
• means for sending said occupation state and said interference amount of said uplink timeslot to said mobile station;
• means for receiving a number of remaining information units and a propagation loss from said mobile station;
• means for obtaining an interference amount by using said propagation loss and a receive level when said number of remaining information units is zero;
• and
• means for sending said interference amount to said mobile station.

A wireless packet transmission system comprising a mobile station and a base station where said mobile station communicates with said base station:

• said mobile station comprising:
• means for obtaining a propagation loss of a received signal in said mobile station based on a transmission power of said base station and a received power of said received signal received from said base station;
• means for receiving an occupation state and an interference amount of an uplink timeslot from said base station;
• means for obtaining a desired wave power of said base station from a transmission power of said mobile station and from said propagation loss;
• means for obtaining a ratio between said desired wave power and said interference amount in said base station for said uplink timeslot in which said occupation state is idle;
• and
• means for selecting an idle timeslot, as a transmission timeslot, which has the lowest ratio between said desired wave power and said interference amount among idle timeslots each of which idle timeslots satisfies a predetermined ratio between desired wave power and said interference amount,
• said base station comprising:
• means for measuring said occupation state and said interference amount of said uplink timeslot;
• and
• means for sending said occupation state and said interference amount of said uplink timeslot to said mobile station.