US 2003/0171124 A1 · Communication traffic control method

Abstract

A communication traffic control method is performed for a hierarchy mobile communication system having a plurality of mobile stations 9a and 9b, a plurality of microcells 7a and 7b and a macrocell 6 including the microcells. Even though an upward transmission electric power of either a mobile station handed over to a macrocell from an adjacent macrocell or a mobile station placed in the neighborhood of a boundary of an area of a macrocell gives interference to communication of a mobile station placed in a microcell of the macrocell, a sufficiently high communication quality is maintained in the mobile station placed in the microcell against the interference. Therefore, when a compulsory hand-over is performed, a mobile station having a long round-trip time period or a measuring impossible round-trip time period is selected to be compulsorily handed over, and a communication traffic control is performed.

Claims7

Dependent claims

A communication traffic control method, in which a communication traffic of a hierarchy mobile communication system having a plurality of mobile stations, a plurality of microcells and a macrocell including the microcells is controlled,

characterized in that the communication traffic control method comprises the step of determining that a compulsory hand-over is to be performed for one mobile station for which a round-trip time period is longer than a threshold value or cannot be measured.

making one microcell have an upward transmission electric power standard value required to communication-connect one mobile station placed in the microcell with the macrocell;
making the microcell notify the mobile station of both the upward transmission electric power standard value and a macrocell code of the macrocell included in information of a notice channel;
making the mobile station, which receives the information of the notice channel, transmit a traffic channel preamble, while increasing an upward transmission electric power of the traffic channel preamble step by step, until the upward transmission electric power reaches the upward transmission electric power standard value or until the mobile station receives a base station acknowledgement order transmitted after a microcell base station of the microcell receives the traffic channel preamble having an electric power intensity equal to or higher than a reception electric power set in the microcell base station;
making the mobile station communication-connect with both the microcell base station and a macrocell base station of the macrocell;
and
performing a site-diversity between the mobile station and both the microcell base station and the macrocell base station.

3 more elements

Dependencies are inferred from the claim text.

Communication traffic control method

Life of this patent

Communication traffic control method

Life of this patent

Abstract

Claims7