Mobile communication control method and system and mobile station thereof

A mobile communication control method in which a mobile station transmits data using at least one currently transmitting base station and also sets a link with base stations forming an active set of base stations, comprising:

• measuring a received signal quality of a pilot signal transmitted from each of said active set of base stations;
• determining at least one transmitting base station from among the active set of base stations in accordance with the measured results, said determining further comprises enabling for transmission all of the active set base stations depending on a state of transmission power value from said at least one currently transmitting base station;
• transmitting a dedicated data signal to said mobile station from said at least one currently transmitting base station;
• estimating a transmission power value of the dedicated data signal transmitted by said at least one currently transmitting base station, and
• making each of the active set of base stations a transmitting base station when a difference between an estimated value of the transmission power value of said at least one currently transmitting base station and a predetermined maximum transmission power value of base station is smaller than or equal to a predetermined threshold value.

A mobile communication system comprising:

• a mobile station;
• at least one currently transmitting base station transmitting data to and from the mobile station;
• and
• base stations with which the mobile station sets a link, forming an active set of base stations,
• wherein the mobile station measures a received signal quality of a pilot signal transmitted from each of said base stations, determines at least one transmitting base station from the active set of base stations in accordance with the measured results,
• wherein the determining of the at least one transmitting base comprises enabled for transmission all of the active set of base stations depending on a state of transmission power value from said at least one currently transmitting base station,
• wherein said active set of base stations transmits a dedicated control signal to said mobile station, said at least one currently transmitting base station transmits a dedicated data signal and the dedicated control signal, and said mobile station estimates a transmission power value of the dedicated control signal transmitted by said active set of base stations, and
• wherein each base station from the active set of base stations are enabled for transmission when an estimated value of the transmission power value of the dedicated control signal transmitted by the active set of base stations other than said at least one currently transmitting base station is greater than or equal to a predetermined threshold value for the estimated value of transmission power value of the dedicated control signal transmitted by said at least one currently transmitting base station.

A mobile communication system comprising:

• a mobile station;
• at least one currently transmitting base station transmitting data to and from the mobile station;
• and
• base stations with which the mobile station sets a link, forming an active set of base stations,
• wherein the mobile station measures a received signal quality of a pilot signal transmitted from each of said base stations, determines at least one transmitting base station from the active set of base stations in accordance with the measured results,
• wherein the determining of the at least one transmitting base comprises enabled for transmission all of the active set of base stations depending on a state of transmission power value from said at least one currently transmitting base station,
• wherein said at least one currently transmitting base station transmits a dedicated data signal to said mobile station, and said mobile station estimates a transmission power value of the dedicated data signal transmitted by said at least one currently transmitting base station, and
• wherein each base station of the active set of base stations is enabled for transmission, if a difference between an estimated value of the transmission power value of said at least one currently transmitting base station and a predetermined maximum transmission power value of base station is smaller than or equal to a predetermined threshold value.

A mobile communication system comprising:

• a mobile station;
• at least one currently transmitting base station transmitting data to and from the mobile station;
• and
• base stations with which the mobile station sets a link, forming an active set of base stations,
• wherein the mobile station measures a received signal quality of a pilot signal transmitted from each of said base stations, determines at least one transmitting base station from the active set of base stations in accordance with the measured results,
• wherein the determining of the at least one transmitting base comprises enabled for transmission all of the active set of base stations depending on a state of transmission power value from said at least one currently transmitting base station,
• wherein said mobile station measures the received signal quality of a signal transmitted from said at least one currently transmitting base station, and
• all of the active set of base stations are enabled for transmission when the received signal quality is less than a predetermined signal quality even if said at least one currently transmitting base station makes the transmission at a predetermined maximum transmission power value.

A mobile station which transmits data using at least one currently transmitting base station and which sets a link with base stations forming an active set of base stations, comprising:

• means for measuring received signal quality of a pilot signal transmitted from said base stations;
• and
• means for determining at least one transmitting base station from the active set of base stations in accordance with the measured results,
• wherein said determining at least one transmitting base station further comprises enabling for transmission each base station from the active set of base stations depending on a state of transmission power value of said at least one currently transmitting base station, and
• wherein said mobile station estimates a transmission power value of the dedicated control signal transmitted by said active set of base stations, and notifies that all base stations of the active set of base stations are enabled for transmission when an estimated value of the transmission power value of said dedicated control signal transmitted by the active set of base stations other than said at least one currently transmitting base station is greater than or equal to a predetermined threshold value for the estimated value of transmission power value of the dedicated control signal transmitted by said at least one currently transmitting base station.

A mobile station which transmits data using at least one currently transmitting base station and which sets a link with base stations forming an active set of base stations, comprising:

• means for measuring received signal quality of a pilot signal transmitted from said base stations;
• and
• means for determining at least one transmitting base station from the active set of base stations in accordance with the measured results,
• wherein said determining at least one transmitting base station further comprises enabling for transmission each base station from the active set of base stations depending on a state of transmission power value of said at least one currently transmitting base station, and
• wherein said mobile stations estimates a transmission power value of the dedicated data signal transmitted by said at least one currently transmitting base station, and notifies that each base station from the active set of base stations are enabled for transmission when a difference between an estimated value of the transmission power value of said at least one currently transmitting base station and predetermined maximum transmission power value of base station is smaller than or equal to a predetermined threshold value.

A mobile station which transmits data using at least one currently transmitting base station and which sets a link with base stations forming an active set of base stations, comprising:

• means for measuring received signal quality of a pilot signal transmitted from said base stations;
• and
• means for determining at least one transmitting base station from the active set of base stations in accordance with the measured results,
• wherein said determining at least one transmitting base station further comprises enabling for transmission each base station from the active set of base stations depending on a state of transmission power value of said at least one currently transmitting base station, and
• wherein said mobile station measures the received signal quality of a signal transmitted from said at least one currently transmitting base station, and notifies that all of the active set base stations are enabled for transmission when the received signal quality is less than a predetermined signal quality even if said at least one currently transmitting base station makes the transmission at predetermined maximum transmission power value.