Transmission power control method and transmission power control device

• US 20050130690A1
• Filed: 01/13/2005
• Published: 06/16/2005
• Est. Priority Date: 09/30/2002
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Shinozaki, Atsushi
• Granted Patent: US 7,069,039 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/245 taking into account received signal strength
• CPC Class Codes: H04W 52/386 centralized, e.g. when the radio network controller or equivalent takes part in the power control

Abstract

In transmission power control in a CDMA mobile communication system which controls the uplink transmission power of a mobile station so as to obtain a target SIR, and also controls the target SIR based on the quality of the transmission path, when one mobile station transmits and receives the same data simultaneously with a plurality of base stations, the quality of each transmission path is monitored. The data received over the transmission path with the best quality is selected, and for each transmission path the selectivity of data sent over the transmission path is calculated, the target SIR is updated based on the data quality after data selection, and for each transmission-path the target SIR after updating is multiplied by the selectivity for each transmission path to obtain the actual target SIR for the transmission path.

Claims

1. A transmission power control method, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station so as to obtain a target SIR and controls the target SIR based on the quality of the transmission path, comprising steps of:

monitoring quality of each of the transmission paths, when one mobile station is transmitting and receiving the same data simultaneously with a plurality of base stations;

selecting data received over the transmission path with the best quality and obtaining, for each transmission path, the selection conditions of data sent over the transmission path;

updating the target SIR based on the data quality after data selection; and

,

reflecting the selection conditions of each transmission path in the target SIR after updating, to obtain the actual target SIR for each transmission path.

5. The transmission power control method according to claim 1, wherein each base station controls the uplink transmission power of the mobile station based on the target SIR, and also appends a quality identifier indicating the quality of received data to the received data and transmits said received data from the mobile station to a base station control device, and said base station control device executes control to update the target SIR based on the quality of each transmission path.

2. A transmission power control method, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station so as to obtain a target SIR and controls the target SIR based on the quality of the transmission path, comprising steps of:

monitoring quality of each of the transmission paths, when one mobile station is transmitting and receiving the same data simultaneously with a plurality of base stations;

selecting data received over the transmission path with the best quality and calculating for each transmission path, the selectivity of data sent over the transmission path;

updating for each transmission path, the target SIR based on the data quality prior to data selection; and

multiplying, for each transmission path, the target SIR after updating by said selectivity of the transmission path to obtain the actual target SIR of the transmission path.

15. The transmission power control method according to claim 2, wherein each base station controls the uplink transmission power of the mobile station based on the target SIR, and also appends a quality identifier indicating the quality of received data to the received data and transmits said received data from the mobile station to a base station control device, and said base station control device executes control to update the target SIR based on the quality of each transmission path.

3. A transmission power control method, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station so as to obtain a target SIR and controls the target SIR based on the quality of the transmission path, comprising steps of:

monitoring quality of each of the transmission paths, when one mobile station is transmitting and receiving the same data simultaneously with a plurality of base stations;

selecting data received over the transmission path with the best quality and calculating for each transmission path, the selectivity of data sent over the transmission path;

updating target SIR based on the data quality after data selection;

calculating the difference between the target SIR value after updating and the reference SIR value, which is the previous updated SIR value; and

,

multiplying said difference by the selectivity of each transmission path to calculate the increase or decrease in target SIR for each transmission path, and adding the increase or decrease for each transmission path to the target SIR up to that time for each transmission path, to obtain the actual target SIR for each the transmission path.

16. The transmission power control method according to claim 3, wherein each base station controls the uplink transmission power of the mobile station based on the target SIR, and also appends a quality identifier indicating the quality of received data to the received data and transmits said received data from the mobile station to a base station control device, and said base station control device executes control to update the target SIR based on the quality of each transmission path.

4. A transmission power control method, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station so as to obtain a target SIR and controls the target SIR based on the quality of the transmission path, comprising steps of:

monitoring quality of each of the transmission paths, when one mobile station is transmitting and receiving the same data simultaneously with a plurality of base stations;

selecting data received over the transmission path with the best quality and calculating, for each transmission path, the selectivity of data sent over the transmission path; and

,

updating, for each transmission path, the target SIR based on the data quality prior to data selection;

calculating, for each transmission path, the difference between the target SIR value after updating and the target SIR of the transmission path up to that time; and

multiplying, for each transmission path, the difference by the selectivity of the transmission path to calculate the increase or decrease in target SIR of the transmission path, and adding the increase or decrease to the target SIR of the transmission path up to that time to obtain the actual target SIR.

17. The transmission power control method according to claim 4, wherein each base station controls the uplink transmission power of the mobile station based on the target SIR, and also appends a quality identifier indicating the quality of received data to the received data and transmits said received data from the mobile station to a base station control device, and said base station control device executes control to update the target SIR based on the quality of each transmission path.

6. A transmission power control device, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station so as to obtain a target SIR and controls the target SIR based on the quality of the transmission path, comprising:

a quality monitoring portion, which, when one mobile station transmits and receives the same data simultaneously with a plurality of base stations, monitors the quality of each of the transmission paths;

a data selection portion, which selects data received over the transmission path with the best quality, and for each transmission path calculates selectivity of data sent over the transmission path;

a target SIR update portion, which updates the target SIR based on the data quality after data selection; and

,

calculating portion for calculating the actual target SIR for each transmission path by multiplying the target SIR after updating by the selectivity for each transmission path.

10. The transmission power control device according to claim 6, wherein each base station controls the uplink transmission power of the mobile station based on the target SIR, and also appends a quality identifier indicating the quality of received data to the received data and transmits said received data to a base station control device, and the transmission power control device of said base station control device executes control to update the target SIR based on the quality of each transmission path.

7. A transmission power control device, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station so as to obtain a target SIR and controls the target SIR based on the quality of the transmission path, comprising:

a quality monitoring portion, which, when one mobile station transmits and receives the same data simultaneously with a plurality of base stations, monitors the quality of each of the transmission paths;

a data selection portion, which selects data received over the transmission path with the best quality, and for each transmission path calculates selectivity of data sent over the transmission path;

for each transmission path, a target SIR update portion which updates the target SIR based on the data quality prior to data selection; and

,

for each transmission path, calculating portion for calculating the actual target SIR for the transmission path by multiplying the target SIR after update with said selectivity for the transmission path.

18. The transmission power control device according to claim 7, wherein each base station controls the uplink transmission power of the mobile station based on the target SIR, and also appends a quality identifier indicating the quality of received data to the received data and transmits said received data to a base station control device, and the transmission power control device of said base station control device executes control to update the target SIR based on the quality of each transmission path.

8. A transmission power control device, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station so as to obtain a target SIR and controls the target SIR based on the quality of the transmission path, comprising:

a quality monitoring portion, which, when one mobile station transmits and receives the same data simultaneously with a plurality of base stations, monitors the quality of each of the transmission paths;

a data selection portion, which selects data received over the transmission path with the best quality, and for each transmission path calculates selectivity of data sent over the transmission path;

a target SIR update portion which updates the target SIR based on the data quality after data selection;

a difference calculation portion, which calculates the difference between the target SIR value after update and the reference SIR value which is the previously updated SIR value;

an increase/decrease calculation portion, which multiplies said difference by the selectivity for each transmission path to calculate the increase or decrease in the target SIR for each transmission path; and

a target SIR calculation portion, which adds said increase or decrease for each transmission path to the target SIR for each transmission path up to that time, to obtain the actual target SIR.

19. The transmission power control device according to claim 8, wherein each base station controls the uplink transmission power of the mobile station based on the target SIR, and also appends a quality identifier indicating the quality of received data to the received data and transmits said received data to a base station control device, and the transmission power control device of said base station control device executes control to update the target SIR based on the quality of each transmission path.

9. A transmission power control device, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station so as to obtain a target SIR and controls the target SIR based on the quality of the transmission path, comprising:

a quality monitoring portion, which, when one mobile station transmits and receives the same data simultaneously with a plurality of base stations, monitors the quality of each of the transmission paths;

a data selection portion, which selects data received over the transmission path with the best quality, and for each transmission path calculates selectivity of data sent over the transmission path;

for each transmission path, a target SIR update portion which updates the target SIR based on the data quality prior to data selection;

for each transmission path, a difference calculation portion which calculates the difference between the target SIR value after updating and the target SIR value for the transmission path up to that time;

for each transmission path, an increase/decrease calculation portion which multiples said difference by the selectivity of the transmission path to calculate the increase or decrease in target SIR for the transmission path; and

,

for each transmission path, a target SIR calculation portion which adds said increase or decrease to the target sir for the transmission path up to that time, to obtain the actual target SIR.

11. A transmission power control device, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station based on a target quality, and also controls the target quality based on the quality of the transmission path, comprising:

a data selection portion which, when one mobile station transmits and receives the same data simultaneously with a plurality of base stations, selects data received over one of the transmission paths, and also, for each transmission path, obtains selection condition of data sent over the transmission path;

a target quality update portion, which updates said target quality based on the data quality after data selection; and

,

calculating portion for calculating the actual target quality for each transmission path by reflecting the selection condition of each transmission path in the target quality after updating.

12. A transmission power control device, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station based on a target quality, and also controls the target quality based on the quality of the transmission path, comprising:

a data selection portion which, when one mobile station transmits and receives the same data simultaneously with a plurality of base stations, selects data received over one of the transmission paths, and also, for each transmission path, obtains selection condition of data sent over the transmission path;

for each transmission path, a target quality update portion which updates said target quality based on the data quality prior to data selection; and

,

for each transmission path, a calculating portion for calculating the actual target quality of the transmission path by reflecting said selection condition of the transmission path in the target quality after updating.

13. A transmission power control device, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station based on a target quality, and also controls the target quality based on the quality of the transmission path, comprising:

a data selection portion which, when one mobile station transmits and receives the same data simultaneously with a plurality of base stations, selects data received over one of the transmission paths, and also, for each transmission path, obtains selection condition of data sent over the transmission path;

a target quality update portion which updates said target quality based on the data quality after data selection;

a difference calculation portion, which calculates the difference between the target quality value after updating and the reference quality value which is the previously updated quality value;

an increase/decrease calculation portion, which reflects the selection condition in said difference for each transmission path and calculates the increase or decrease in target quality for each transmission path; and

,

a target quality calculation portion, which for each transmission path adds said increase or decrease to the target quality for each transmission path up to that time, to obtain the actual target quality.

14. A transmission power control device, in a CDMA mobile communication system which controls the uplink transmission power of a mobile station based on a target quality, and also controls the target quality based on the quality of the transmission path, comprising:

a data selection portion which, when one mobile station transmits and receives the same data simultaneously with a plurality of base stations, selects data received over one of the transmission paths, and also, for each transmission path, obtains selection condition of data sent over the transmission path;

for each transmission path, a target quality update portion which updates the target quality based on the data quality prior to data selection;

for each transmission path, a difference calculation portion which calculates the difference between the target quality value after updating and the target quality for the transmission path up to that time;

for each transmission path, an increase/decrease calculation portion which reflects the selection condition of the transmission path in said difference, and calculates the increase or decrease in target quality for the transmission path; and

,

for each transmission path, a target quality calculation portion which adds said increase or decrease to the target quality for the transmission path up to that time, to obtain the actual target quality.