IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0076714
(2008-03-21)
|
등록번호 |
US-8135428
(2012-03-13)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
5 |
초록
▼
A transmission power control target value calculating apparatus that calculates target values, which are used for transmission power control of radio waves sent through radio transmission paths, comprises: a first target value calculating section that calculates a first transmission power control ta
A transmission power control target value calculating apparatus that calculates target values, which are used for transmission power control of radio waves sent through radio transmission paths, comprises: a first target value calculating section that calculates a first transmission power control target value based on quality of combined data which is obtained by combining data obtained through the radio transmission paths; and a second target value calculating section that determines a second transmission power control target value to be applied to at least one of the radio transmission paths, based on the first transmission power control target value and quality information of each of the radio transmission paths.
대표청구항
▼
1. A transmission power control target value calculating apparatus that calculates target values, which are used for transmission power control of radio waves sent through a plurality of radio transmission paths, comprising: a first target value calculating section that calculates a first transmissi
1. A transmission power control target value calculating apparatus that calculates target values, which are used for transmission power control of radio waves sent through a plurality of radio transmission paths, comprising: a first target value calculating section that calculates a first transmission power control target value which corresponds to combined data which is obtained by combining data obtained through the plurality of radio transmission paths, based on quality of the combined data; anda second target value calculating section that calculates a plurality of second transmission power control target values, each of which is applied to each of the plurality of radio transmission paths, respectively,wherein each of the second transmission power control target values, each of which corresponds to each of the plurality of radio transmission paths, is calculated based on the first transmission power control target value and quality information of data obtained through the corresponding radio transmission path before being combined into the combined data, respectively, wherein the first transmission power control target value is a virtual transmission power control target value which is not applied to any one of the plurality of radio transmission paths in an inner loop transmission power control. 2. The transmission power control target value calculating apparatus according to claim 1, wherein the first target value calculating section holds a target value for the quality of the combined data, compares the quality of the combined data with the target value for the quality of the combined data, calculates the first transmission power control target value to increase transmission power when the quality of the combined data is larger than the target value for the quality of the combined data, and calculates the first transmission power control target value to reduce the transmission power when the quality of the combined data is smaller than the target value for the quality of the combined data. 3. The transmission power control target value calculating apparatus according to claim 1, wherein: the second target value calculating section calculates the plurality of second transmission power control target values when a notification is received from the first target value calculating section; andthe first target value calculating section stores the preceding first transmission power control target value which is calculated last, obtains, when a new first transmission power control target value is calculated, a difference between the preceding first transmission power control target value and the new first transmission power control target value, and sends, when the difference is obtained, the notification of the difference. 4. The transmission power control target value calculating apparatus according to claim 1, wherein the second target value calculating section holds target quality, compares the quality information of each of the plurality of radio transmission paths with the target quality when a value indicating the first transmission power control target value is notified from the first target value calculating section, and excludes, when the value indicating the first transmission power control target value indicates an increase in the transmission power, a radio transmission path whose quality information is higher than the target quality, from targets for which the plurality of second transmission power control target values are to be calculated. 5. The transmission power control target value calculating apparatus according to claim 1, wherein the second target value calculating section holds target quality, compares the quality information of each of the plurality of radio transmission paths with the target quality when a value indicating the first transmission power control target value is notified from the first target value calculating section, and excludes, when the value indicating the first transmission power control target value indicates a reduction in the transmission power, a radio transmission path whose quality information is lower than the target quality, from targets for which the plurality of second transmission power control target values are to be calculated. 6. The transmission power control target value calculating apparatus according to claim 1, wherein the second target value calculating section holds target quality and an upper limit quality value, compares the quality information of each of the plurality of radio transmission paths with the target quality and the upper limit quality value when a value indicating the first transmission power control target value is received from the first target value calculating section, and excludes, when the value indicating the first transmission power control target value indicates an increase in the transmission power, a radio transmission path whose quality information is higher than the target quality and the upper limit quality value from targets for which the plurality of second transmission power control target values are to be calculated. 7. The transmission power control target value calculating apparatus according to claim 1, wherein the second target value calculating section holds target quality and a lower limit quality value, compares the quality information of each of the plurality of radio transmission paths with the target quality and the lower limit quality value when a value indicating the first transmission power control target value is received from the first target value calculating section, and excludes, when the value indicating the first transmission power control target value indicates a reduction in the transmission power, a radio transmission path whose quality information is lower than the target quality and the lower limit quality value from targets for which the plurality of second transmission power control target values are to be calculated. 8. The transmission power control target value calculating apparatus according to claim 1, wherein the second target value calculating section holds target quality, compares the target quality with the quality information of each of the plurality of radio transmission paths when a notification is received from the first target value calculating section; excludes a radio transmission path whose quality information indicates the same value as the quality of the combined data, from targets for which the plurality of second transmission power control target values are to be calculated; and calculates a new second transmission power control target value which is obtained by increasing or reducing, by a predetermined amount, the second transmission power control target value that is currently used for the transmission power control, for at least one of the plurality of radio transmission paths whose quality information does not indicate the same value as the quality of the combined data. 9. The transmission power control target value calculating apparatus according to claim 1, wherein, when a value indicating the first transmission power control target value is notified from the first target value calculating section, the second target value calculating section determines, based on the quality information of each of the plurality of radio transmission paths that are targets for which the plurality of second transmission power control target values are to be calculated, a plurality of allocation amounts of the value indicating the first transmission power control target value to the plurality of target radio transmission paths, wherein each of the plurality of allocation amounts corresponds to each of the plurality of target radio transmission paths. 10. The transmission power control target value calculating apparatus according to claim 9, wherein the second target value calculating section calculates a plurality of weights Rs (0≦R≦1) for the plurality of target radio transmission paths based on the quality information of each of the plurality of target radio transmission paths, and multiplies the value indicating the first transmission power control target value by each of the plurality of weights Rs to determine each of the plurality of allocation amounts of the value indicating the first transmission power control target value to the plurality of target radio transmission paths, wherein each of the plurality of weights Rs corresponds to each of the plurality of target radio transmission paths. 11. The transmission power control target value calculating apparatus according to claim 9, wherein the second target value calculating section adds a predetermined value to each of the determined allocation amounts. 12. The transmission power control target value calculating apparatus according to claim 9, wherein: the value indicating the first transmission power control target value is the first transmission power control target value; andthe second target value calculating section calculates each of the plurality of allocation amounts of the first transmission power control target value to each of the plurality of target radio transmission paths, as the second transmission power control target value to be applied to each of the plurality of target radio transmission paths. 13. The transmission power control target value calculating apparatus according to claim 9, wherein: the first target value calculating section calculates the first transmission power control target value at intervals of a predetermined measurement cycle;the value indicating the first transmission power control target value is a difference value between a first transmission power control target value calculated in the preceding measurement cycle and a first transmission power control target value calculated in the current measurement cycle; andthe second target value calculating section calculates a plurality of allocation amounts of the difference value to the plurality of target radio transmission paths, as update amounts of the plurality of second transmission power control target values, each of which currently used for each of the plurality of target radio transmission paths, wherein each of the plurality of allocation amounts of the difference value corresponds to each of the plurality of target radio transmission paths. 14. The transmission power control target value calculating apparatus according to claim 1, wherein: the quality of the combined data comprises an error rate of the combined data; andthe quality information of each of the plurality of radio transmission paths comprises an error rate of data obtained through each of the plurality of radio transmission paths. 15. The transmission power control target value calculating apparatus according to claim 1, wherein the second target value calculating section performs calculation processing of the plurality of second transmission power control target values when a ratio of data obtained through each of the radio transmission paths is changed. 16. A transmission power control target value calculating method performed by an information processor that calculates target values, which are used for transmission power control of radio waves sent through a plurality of radio transmission paths, the method comprising: calculating a first transmission power control target value which corresponds to combined data which is obtained by combining data obtained through the plurality of radio transmission paths, based on quality of the combined data; andcalculating a plurality of second transmission power control target values, each of which is applied to each of the plurality of radio transmission paths, respectively,wherein each of the second transmission power control target values, each of which corresponds to each of the plurality of radio transmission paths, is calculated based on the first transmission power control target value and quality information of data obtained through the corresponding radio transmission path before being combined into the combined data, respectively, wherein the first transmission power control target value is a virtual transmission power control target value which is not applied to any one of the plurality of radio transmission paths in an inner loop transmission power control.
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