US 6,272,119 B1 · Method of CDMA radio wave communication with transmission quality detection and controlling and a CDMA base and mobile stations with quality detection and controlling

Abstract

In a first CDMA communication method, a CDMA radio wave signal is transmitted at a first place (a base station). A mobile unit receives the first CDMA radio wave signal and stores at least a portion of the data in the received signal and returns it to the base station by attaching the portion of the data to second data to be transmitted through spectrum spreading, wherein the data rate of the attached data is higher than the second data. The base station detects an upward line transmission quality from the received second CDMA radio wave signal from the mobile unit and detects a downward line transmission quality from the attached data forwarded by the mobile station. The base station outputs the downward line transmission quality when the upward line transmission quality is higher than a reference. When the downward line transmission quality is lower than a reference, the data is retransmitted from the base station and for a predetermined interval in this condition, transmission is stopped as transmission controlling. In a second CDMA communication method, the downward line transmission quality is measured in the mobile station and the data of downward line transmission quality is attached in place of the forwarded data and transmission controlling is similarly provided. Corresponding base and mobile stations are also disclosed.

Claims16

Dependent claims

A method of CDMA radio wave communication comprising the steps of:

generating a first radio wave signal at a transmission efficiency including the steps of:
spreading first data with a first PN code;
and
transmitting the spread first data from a first place as said first radio wave signal;
receiving said first data from said first radio wave signal from said first place at a second place remote from said first place;
despreading the received first data;
converting at least a portion of the despread first data into rate converted data having a first data rate to output rate converted data;
multiplexing said rate converted data with a second data having a second data rate to output a combined data, said first data rate being higher than said second data rate;
spreading said combined data with a second PN code;
transmitting the spread combined data from said second place;
receiving the transmitted combined data at said first place as third data;
despreading the third data into fourth data;
measuring a first transmission quality of the third data at said first place;
measuring a second transmission quality of said rate converted data at said first place;
and
outputting the measured second transmission quality when said first transmission quality is higher than a reference.

13 more elements

A base station comprising:

radio wave generation means for generating a radio wave signal at a transmissions efficiency, said radio wave generation means including:
spreading means for spreading first data with a first PN code;
and
transmitting means for transmitting the spread first data as said radio wave signal;
receiving means for receiving a radio wave as third data including combined data including second data and rate converted data spread with a second PN code from a mobile station, said rate converted data being generated from at least a portion of the first data received by said mobile station, said rate converted data having a first data rate higher than a second data rate of said second data;
despreading means for despreading the received combined data as fourth data;
first measuring means for measuring a first transmission quality of an upward transmission from said mobile station from the combined data from said despreading means;
second measuring means for measuring a second transmission quality of a downward transmission to said mobile unit from the rate converted data from said despreading means;
and
outputting means for outputting the measured second transmission quality when said first transmission quality is higher than a reference.

7 more elements

Dependencies are inferred from the claim text.

Method of CDMA radio wave communication with transmission quality detection and controlling and a CDMA base and mobile stations with quality detection and controlling

Life of this patent

Method of CDMA radio wave communication with transmission quality detection and controlling and a CDMA base and mobile stations with quality detection and controlling

Life of this patent

Abstract

Claims16