Mobile communication system, communication control method, and base station and mobile station to be employed in the same

A mobile communication system comprising:

• transmission control means for providing a vacant period, in which no communication data is present, in one or more of communication frames from a timing immediately after a second control signal for maintaining communication quality.

A mobile communication system comprising:

• transmission control means for providing a vacant period in which no communication data is present, in one or more of communication frames, from a timing immediately after a second control signal for maintaining a communication quality, and transmitting a third control signal for maintaining the communication quality immediately after end of said vacant period,
• each of said second and third control signals being a pilot signal to be used for demodulation of the communication data or a transmission power control for a forward link.

A mobile communication system comprising:

• transmission control means for providing a vacant period in which no communication data is present, in one or more of communication frames, from a timing immediately after a second control signal for maintaining a communication quality, and transmitting a third control signal for maintaining the communication quality immediately after end of said vacant period,
• said second control signal being a transmission power control for a reverse link and third control signal being a pilot signal to be used for demodulation of the communication data or a transmission power control for a forward link.

A communication control method comprising:

• a step of providing a vacant period, in which no communication data is present, in one or more of communication frames, and
• a step of inserting a first control signal for maintaining a communication quality in said vacant period, for transmission.

A communication control method comprising:

• a step of transmitting a second control signal for maintaining a communication quality in one or more of communication frames;
• and
• a step of providing a vacant period, in which no communication data is present, at a timing immediately after said second control signal.

A communication control method comprising:

• a step of providing a vacant period in which no communication data is present, in one or more of communication frames, from a timing immediately after a second control signal for maintaining a communication quality, and transmitting a third control signal for maintaining the communication quality immediately after end of said vacant period,
• each of said second and third control signals being a pilot signal to be used for demodulation of the communication data or a transmission power control for a forward link.

A communication control method comprising:

• a step of providing a vacant period in which no communication data is present, in one or more of communication frames, from a timing immediately after a second control signal for maintaining a communication quality, and transmitting a third control signal for maintaining the communication quality immediately after end of said vacant period,
• said second control signal being a transmission power control for a reverse link and third control signal being a pilot signal to be used for demodulation of the communication data or a transmission power control for a forward link.

A base station in a mobile communication system, comprising:

• transmission control means for providing a vacant period, in which no communication data is present, in one or more of communication frames, and inserting a first control signal for maintaining a communication quality in said vacant period.

A base station in a mobile communication system, comprising:

• transmission control means for providing a vacant period, in which no communication data is present, in one or more of communication frames from a timing immediately after a second control signal for maintaining communication quality.

A base station in a mobile communication system, comprising:

• transmission control means for providing a vacant period in which no communication data is present, in one or more of communication frames, from a timing immediately after a second control signal for maintaining a communication quality, and transmitting a third control signal for maintaining the communication quality immediately after end of said vacant period,
• each of said second and third control signals being a pilot signal to be used for demodulation of the communication data or a transmission power control for a forward link.

A base station in a mobile communication system, comprising:

• transmission control means for providing a vacant period in which no communication data is present, in one or more of communication frames, from a timing immediately after a second control signal for maintaining a communication quality, and transmitting a third control signal for maintaining the communication quality immediately after end of said vacant period,
• said second control signal being a transmission power control for a reverse link and third control signal being a pilot signal to be used for demodulation of the communication data or a transmission power control for a forward link.

A mobile station in a mobile communication system, comprising:

• quality measuring means for receiving a first control signal for maintaining a communication quality transmitted in a vacant period in which no communication data is present, in one or more of communication frames and measuring a reception quality on the basis of said first control signal;
• and
• transmitting means for generating and transmitting a transmission power control information for a forward link according to said reception quality.

A mobile station in a mobile communication system, comprising:

• demodulation means for receiving a first control signal for maintaining a communication quality transmitted in a vacant period in which no communication data is present, in one or more of communication frames and demodulating a communication data using the first control signal.

A mobile station in a mobile communication system, comprising:

• means for receiving a first control signal for maintaining a communication quality transmitted in a vacant period in which no communication data is present, in one or more of communication frames and controlling a transmission power in a reverse link according to said first control signal.

A mobile station in a mobile communication system, comprising:

• quality measuring means for receiving a second control signal for maintaining a communication quality transmitted at a timing immediately before a vacant period in which no communication data is present, in one or more of communication frames and measuring a reception quality on the basis of said second control signal;
• and
• transmitting means for generating and transmitting a transmission power control information for a forward link according to said reception quality.

A mobile station in a mobile communication system, comprising:

• demodulation means for receiving a second control signal for maintaining a communication quality transmitted at a timing immediately before a vacant period in which no communication data is present, in one or more of communication frames and demodulating a communication data using said second control signal.

A mobile station in a mobile communication system, comprising:

• means for receiving a second control signal for maintaining a communication quality transmitted at a timing immediately before a vacant period in which no communication data is present, in one or more of communication frames and controlling a transmission power in a reverse link on the basis of said second control signal.

A mobile station in a mobile communication system, comprising:

• quality measuring means for receiving a second control signal for maintaining a communication quality transmitted at a timing immediately before a vacant period in which no communication data is present, in one or more of communication frames and receiving a third control signal for maintaining the communication quality transmitted at a timing immediately after said vacant period, and measuring a reception quality on the basis of said second or third control signal;
• and
• transmitting means for generating and transmitting a transmission power control information for a forward link according to said reception quality.

A mobile station in a mobile communication system, comprising:

• demodulation means for receiving a second control signal for maintaining a communication quality transmitted at a timing immediately before a vacant period in which no communication data is present, in one or more of communication frames and receiving a third control signal for maintaining the communication quality transmitted at a timing immediately after said vacant period, and demodulating a communication data using said second or third control signal.

A mobile station in a mobile communication system, comprising:

• demodulation means for receiving a second control signal for maintaining a communication quality transmitted at a timing immediately before a vacant period in which no communication data is present, in one or more of communication frames and receiving a third control signal for maintaining the communication quality transmitted at a timing immediately after said vacant period, and demodulating a communication data using said third control signal;
• and
• means for controlling a transmission power in a reverse link on the basis of said second control signal.