Code division multiple access communication system

Claim 2

A code division multiple access communication system comprising: a mobile station, a base station, and mobile communication control equipment; wherein a plurality of carriers are allocated for mobile communications, and said mobile station includes: reception power measurement means for measuring the reception power of said mobile station; pilot signal despread means for despreading a pilot signal; base station number detection means for detecting the base station number according to the despread pilot signal; and self-sacrifice information generation means for generating self-sacrifice information that said mobile station is in a self-sacrifice state according to the detected base station number and the output of said reception power measurement means; said base station includes: means for generating a pilot signal; and self-sacrifice information detection means for detecting the self-sacrifice information transmitted from said mobile station; and said mobile communication control equipment includes: means for generating information to prohibit or restrict the use of a designated carrier at said base station according to the output of said self-sacrifice information detection means transmitted from said base station.

Claim 3

A code division multiple access communication system as recited in claim 1, wherein a plurality of base stations are provided, and pilot signals transmitted from each base station have the same frequencies and spread codes and different phases.

Claim 4

A code division multiple access communication system as recited in claim 1, wherein said mobile station further includes: power control means for controlling the transmission power according to the reception power received by said reception power measurement means; spread means for spreading transmission data and the self-sacrifice information; and data signal despread means for despreading a received data signal.

Claim 5

A code division multiple access communication system as recited in claim 1, wherein said base station further includes: despread means for despreading a signal representing the self-sacrifice information transmitted from said mobile station; data signal spread means for spreading data to be transmitted to said mobile station; adder means for adding the spread data from said data signal spread means and a pilot signal; and carrier determination means for determining a carrier to be used at said base station based on the self-sacrifice information to prohibit or restrict the use of a designated carrier received from said mobile communication control equipment.

Claim 6

A code division multiple access communication system comprising: a mobile station, a base station, and mobile communication control equipment; wherein said mobile station includes: base station number detection means for detecting a base station number by despreading a pilot signal spread-transmitted from said base station; self-sacrifice information generation means for generating self-sacrifice information indicating that said mobile station is in a self-sacrifice state according to the detected base station number and the reception power; and spread means for spreading transmission data and the self-sacrifice information; said base station includes: self-sacrifice information detection means for detecting the self-sacrifice information from information obtained by despreading a signal from said mobile station; and carrier determination means for determining a carrier to be used at said base station based on the self-sacrifice information to prohibit or restrict the use of a designated carrier output by said mobile communication control equipment; and said mobile communication control equipment includes: means for generating information to prohibit or restrict the use of a designated carrier at said base station according to the output of said self-sacrifice information detection means transmitted from said base station.

Claim 7

A code division multiple access communication system comprising: a mobile station, a base station, and mobile communication control equipment; wherein said mobile station includes: base station number detection means for detecting a base station number by despreading a pilot signal spread-transmitted from said base station; self-sacrifice information generation means for generating self-sacrifice information indicating that said mobile station is in a self-sacrifice state according to the detected base station number and the reception power; and spread means for spreading transmission data and the self-sacrifice information; said base station includes: self-sacrifice information detection means for detecting the self-sacrifice information from information obtained by despreading a signal from said mobile station; and carrier determination means for determining a carrier to be used at said base station based on the self-sacrifice information to prohibit or restrict the use of a designated carrier output by said mobile communication control equipment; and said mobile communication control equipment includes: means for generating information to prohibit or restrict the use of a designated carrier at said base station according to the output of said self-sacrifice information detection means transmitted from said base station.

Claim 8

A code division multiple access communication system comprising: a mobile station, a base station, and mobile communication control equipment; wherein a plurality of carriers are allocated for mobile communications, and said mobile station includes: reception power measurement means for measuring the reception power; and self-sacrifice information generation means for generating self-sacrifice information indicating that said mobile station is in a self-sacrifice state according to the quality of the reception data and the output of said reception power measurement means; said base station includes: self-sacrifice information detection means for detecting the self-sacrifice information transmitted from said mobile station; and said mobile communication control equipment includes: means for generating information to prohibit or restrict the use of a designated carrier at said base station according to the output of said self-sacrifice information detection means transmitted from said base station.

Claim 9

A code division multiple access communication system comprising: a mobile station, a base station, and mobile communication control equipment; wherein a plurality of carriers are allocated for mobile communications, and said mobile station includes: reception power measurement means for measuring the reception power; and self-sacrifice information generation means for generating self-sacrifice information indicating that said mobile station is in a self-sacrifice state according to the quality of the reception data and the output of said reception power measurement means; said base station includes: self-sacrifice information detection means for detecting the self-sacrifice information transmitted from said mobile station; and said mobile communication control equipment includes: means for generating information to prohibit or restrict the use of a designated carrier at said base station according to the output of said self-sacrifice information detection means transmitted from said base station.

Claim 10

A code division multiple access communication system as recited in claim 6, wherein: said mobile station further includes: power control means for controlling the transmission power according to the reception power measured by said reception power measurement means; data signal despread means for despreading a received data signal; and spread means for spreading transmission data and said self-sacrifice information.

Claim 11

A code division multiple access communication system as recited in claim 6, wherein said base station further includes: despread means for despreading a signal representing the self-sacrifice information transmitted from said mobile station; data signal spread means for spreading data to be transmitted to said mobile station; and carrier determination means for determining a carrier to be used at said base station based on information to prohibit or restrict the use of a designated carrier received from said mobile communication control equipment.

Claim 12

A code division multiple access communication system comprising: a mobile station, a base station, and mobile communication control equipment; wherein said mobile station includes: self-sacrifice information generation means for generating self-sacrifice information indicating that said mobile station is in a self-sacrifice state according to a reception data quality and a reception power; and spread means for spreading transmission data and the self-sacrifice information; said base station includes: self-sacrifice information detection means for detecting the self-sacrifice information from information obtained by despreading a signal from said mobile station; and carrier determination means for determining a carrier to be used at said base station based on the self-sacrifice information to prohibit or restrict the use of a designated carrier output by said mobile communication control equipment; and said mobile communication control equipment includes: means for generating information to prohibit or restrict the use of a designated carrier at said base station according to the output of said self-sacrifice information detection means transmitted from said base station.

Claim 13

A code division multiple access communication system comprising: a mobile station, a base station, and mobile communication control equipment; wherein said mobile station includes: self-sacrifice information generation means for generating self-sacrifice information indicating that said mobile station is in a self-sacrifice state according to a reception data quality and a reception power; and spread means for spreading transmission data and the self-sacrifice information; said base station includes: self-sacrifice information detection means for detecting the self-sacrifice information from information obtained by despreading a signal from said mobile station; and carrier determination means for determining a carrier to be used at said base station based on the self-sacrifice information to prohibit or restrict the use of a designated carrier output by said mobile communication control equipment; and said mobile communication control equipment includes: means for generating information to prohibit or restrict the use of a designated carrier at said base station according to the output of said self-sacrifice information detection means transmitted from said base station.

Claim 14

A communication method in a code division multiple access communication system comprising: reducing the power level of a transmission signal of a mobile station, when the reception power at said mobile station suddenly increases; detecting whether the level of a pilot signal from a base station which said mobile station is now communicating with has increased; providing self-sacrifice information to said base station, indicating that said mobile station is in a self-sacrifice state, when the level of the pilot signal does not increase; designating a carrier which said base station is prohibited or restricted from using according to said self-sacrifice information; and prohibiting or restricting a base station from using the designated carrier.

Claim 15

A communication method in a code division multiple access communication system comprising: reducing the power level of a transmission signal of a mobile station, when the reception power at said mobile station suddenly increases; detecting whether the level of a pilot signal from a base station which said mobile station is now communicating with has increased; providing self-sacrifice information to said base station, indicating that said mobile station is in a self-sacrifice state, when the level of the pilot signal does not increase; designating a carrier which said base station is prohibited or restricted from using according to said self-sacrifice information; and prohibiting or restricting a base station from using the designated carrier.

Claim 16

A communication method in a code division multiple access communication system comprising: reducing the power of a transmission signal of a mobile station, when the reception power at said mobile station suddenly increases; detecting whether the reception data quality of said mobile station has improved; providing self-sacrifice information to a base station, indicating that said mobile station is in a self-sacrifice state, when the reception data to quality has not improved; designating a carrier which said base station is prohibited or restricted from using according to said self-sacrifice information; and prohibiting or restricting a base station from using the designated carrier.

Claim 17

A communication method in a code division multiple access communication system comprising: reducing the power of a transmission signal of a mobile station, when the reception power at said mobile station suddenly increases; detecting whether the reception data quality of said mobile station has improved; providing self-sacrifice information to a base station, indicating that said mobile station is in a self-sacrifice state, when the reception data to quality has not improved; designating a carrier which said base station is prohibited or restricted from using according to said self-sacrifice information; and prohibiting or restricting a base station from using the designated carrier.