Mobile communication system, radio base station and radio mobile station
First Claim
1. A mobile communication system having a mobile station and first and second radio base stations for receiving a radio signal transmitted from said mobile station, said system comprising:
- an evaluation unit for evaluating a first radio environment between said mobile station and said first radio base station, and a second radio environment between said mobile station and said second radio base station; and
a transmission controller for exercising control that limits transmission of data from said mobile station in a case where, based upon the evaluation in said evaluation unit, the first radio environment belongs to a first radio environment state superior to a prescribed first reference but the second radio environment belongs to a second radio environment state that is inferior to a prescribed second reference.
1 Assignment
0 Petitions
Accused Products
Abstract
Each radio base station (11, 21) evaluates whether a radio environment between itself and a mobile station is an environment in which diversity gain is obtained or an environment in which diversity gain is not obtained and interference will be impressed upon communication with another radio base station, allows the mobile station to transmit if the radio environment is the environment in which diversity gain is obtained, disallows the mobile station to transmit if the environment is the environment in which interference will be impressed upon communication with another radio base station, and neither allows nor disallows the mobile station to transmit if the environment is an environment in which although diversity gain is not obtained, no interference will be impressed upon communication with another radio base station. The mobile station performs a transmission of uplink data if it is being allowed to transmit by one or more radio base stations and, moreover, it is not being disallowed to transmit by any radio base station.
39 Citations
17 Claims
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1. A mobile communication system having a mobile station and first and second radio base stations for receiving a radio signal transmitted from said mobile station, said system comprising:
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an evaluation unit for evaluating a first radio environment between said mobile station and said first radio base station, and a second radio environment between said mobile station and said second radio base station; and
a transmission controller for exercising control that limits transmission of data from said mobile station in a case where, based upon the evaluation in said evaluation unit, the first radio environment belongs to a first radio environment state superior to a prescribed first reference but the second radio environment belongs to a second radio environment state that is inferior to a prescribed second reference. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A radio base station in a mobile communication system having a mobile station and first and second radio base stations for receiving a radio signal transmitted from said mobile station, said radio base station comprising:
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a radio environment evaluation unit for evaluating whether a radio environment between said mobile station and the radio base station is an environment in which diversity gain is obtained or an environment in which diversity gain is not obtained and interference will be impressed upon communication with another radio base station; and
a transmission controller for allowing said mobile station to transmit if the radio environment is the environment in which diversity gain is obtained, disallowing said mobile station to transmit if the radio environment is the environment in which interference will be impressed upon communication, and neither allowing nor disallowing said mobile station to transmit if the radio environment is an environment in which although diversity gain is not obtained, no interference will be impressed upon communication. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A mobile station in a mobile communication system having a mobile station and first and second radio base stations for receiving a radio signal transmitted from said mobile station, said mobile station comprising:
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a radio environment measurement unit for measuring radio environments between the mobile station and one or more radio base stations and outputting a radio environment measurement value;
a radio environment discrimination unit for comparing, for each radio base station, the radio environment measurement value with a first threshold value and a second threshold value that is smaller than the first threshold value, determining that the radio environment is one in which a transmission to the radio base station is possible if the measurement value is greater than the first threshold value, determining that the radio environment is one in which a transmission to the radio base station is impossible if the measurement value is less than the first threshold value and greater than the second threshold value, and determining that the radio environment is one in which no interference will be impressed upon the radio base station, even if the mobile station transmits, if the measurement value is less than the second threshold value; and
a transmission controller for performing a transmission of uplink data if the radio environments between this mobile station and one or more radio base stations are radio environments in which the transmission is possible and, moreover, the radio environment between this mobile station and any radio base station is not a radio environment in which the transmission is impossible. - View Dependent Claims (16, 17)
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Specification