Method of controlling transmission power in a mobile radio system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04B-007/216
H04B-007/204
출원번호
UP-0878269
(2001-06-12)
등록번호
US-7626970
(2009-12-16)
우선권정보
FR-00 07534(2000-06-13)
발명자
/ 주소
Agin, Pascal
출원인 / 주소
Alcatel
대리인 / 주소
Sughrue Mion, PLLC
인용정보
피인용 횟수 :
3인용 특허 :
11
초록▼
A method of controlling transmission power in a mobile radio system in which a power control algorithm controls transmission power as a function of a transmission quality target value, wherein a target value is varied to compensate the effects of a compressed transmission mode in which transmission
A method of controlling transmission power in a mobile radio system in which a power control algorithm controls transmission power as a function of a transmission quality target value, wherein a target value is varied to compensate the effects of a compressed transmission mode in which transmission is interrupted during transmission gaps and the bit rate is increased correspondingly to compensate the transmission gaps. The target value variation includes a first component for compensating the effects of the increase in bit rate and a second component for compensating other effects of transmission gaps. A corresponding anticipated variation of the transmission power is applied, and the anticipated variation of the transmission power corresponds to an approximate value of the target value variation obtained by a process of approximation from the second component.
대표청구항▼
The invention claimed is: 1. A method of controlling transmission power in a mobile radio system in which a power control algorithm controls transmission power as a function of a transmission quality target value, said method comprising the steps of: in the event of a target value variation applied
The invention claimed is: 1. A method of controlling transmission power in a mobile radio system in which a power control algorithm controls transmission power as a function of a transmission quality target value, said method comprising the steps of: in the event of a target value variation applied to compensate the effects of a compressed transmission mode in which transmission is interrupted during transmission gaps and the bit rate is increased correspondingly to compensate for the transmission gaps, wherein said target value variation includes a first component for compensating for the effects of said increased bit rate and a second component for compensating for other effects of transmission gaps, obtaining an approximate value of said target value variation, by approximation of said second component, and anticipatorily varying the transmission power by an amount corresponding to said approximate value of said target value variation. 2. A method according to claim 1, comprising a step of obtaining an approximate value of said second component for a given transmission direction, from the second component for the opposite transmission direction. 3. A method according to claim 1, wherein said power control algorithm simultaneously controls the transmission power of at least two channels, including a data channel and a control channel, as a function of a transmission quality target value, and the transmission power of said control channel is offset relative to the transmission power of said data channel, said method comprising a step of applying anticipated variations of at least one of the transmission power of the data channel, the transmission power of the control channel and the offset of the transmission power of the control channel relative to the transmission power of the data channel, in order to obtain an anticipated variation of the transmission power of the data channel that corresponds to said approximate value of the target value variation. 4. A method according to claim 3, wherein, in the event of target value variation, said anticipated variations of at least one of the transmission power of the data channel, the transmission power of the control channel and/or of the offset of transmission power of the control channel relative to the transmission power of the data channel are determined so that the power of the signal transmitted on the control channel is the same before and after said target value variation and over the same reference period. 5. A method according to claim 3, wherein, in the event of target value variation, an anticipated variation of the offset of the transmission power of the control channel relative to the transmission power of the data channel is applied that corresponds to the opposite of said approximate value of the target value variation. 6. A method according to claim 3, wherein, in the event of target value variation, an anticipated variation of the transmission power of the data channel and the transmission power of the control channel is applied that corresponds to said approximate value of the target value variation. 7. A method according to claim 1, wherein said target value is adjusted by an adjustment algorithm as a function of a required quality of service and said target value variation is intended, in the event of a change to the required quality of service, to anticipate the corresponding target value variation adjusted by said adjustment algorithm. 8. A base station according to claim 7, comprising means for using said second component which is signaled to it by a base station controller, for obtaining said approximate value of the downlink target value variation. 9. A mobile radio system in which a power control algorithm controls transmission power as a function of a transmission quality target value, said mobile radio system comprising: means for, in the event of a target value variation applied to compensate for the effects of a compressed transmission mode in which transmission is interrupted during transmission gaps and the bit rate is increased correspondingly to compensate for the transmission gaps, wherein said target value variation includes a first component for compensating for the effects of said increased bit rate and a second component for compensating for other effects of transmission gaps, obtaining an approximate value of said target value variation, by approximation of said second component, and means for anticipatorily varying the transmission power by an amount corresponding to said approximate value of said target value variation. 10. A mobile radio system according to claim 9, wherein said transmission power control algorithm simultaneously controls the transmission power of at least two channels, including a data channel and a control channel, as a function of transmission quality target value, with the transmission power of said control channel offset relative to the transmission power of said data channel, said mobile radio system comprising means for applying anticipated variations of at least one of the transmission power of the data channel, the transmission power of the control channel and the offset of the transmission power of the control channel relative to the transmission power of the data channel in order to obtain said anticipatory variation of the transmission power of the data channel. 11. A mobile radio system according to claim 10, further comprising means such that, in the event of target value variation, said anticipated variations of the at least one of the transmission power of the data channel, the transmission power of the control channel and the offset of the transmission power of the control channel relative to the transmission power of the data channel cause the signal transmitted on the control channel to have the same power before and after said target value variation and over the same reference period. 12. A mobile radio system according to claim 9, comprising means for applying, in the event of target value variation, an anticipated variation of the offset of the transmission power of the control channel relative to the transmission power of the data channel that corresponds to the opposite of said approximate value of the target value variation. 13. A mobile radio system according to claim 9, comprising means for applying, in the event of target value variation, an anticipated variation of the transmission power of said data channel and the transmission power of said control channel that corresponds to said approximate value of the target value variation. 14. A system according to claim 9, comprising means for obtaining an approximate value of said second component for a given transmission direction, from the second component for the opposite transmission direction. 15. A base station in which a power control algorithm controls a downlink transmission power as a function of a transmission quality target value, said base station comprising: means for, in the event of a target value variation applied to compensate for the effects of a compressed transmission mode in which transmission is interrupted during transmission gaps and the bit rate is increased correspondingly to compensate for the transmission gaps, wherein said target value variation includes a first component for compensating for the effects of said increased bit rate and a second component for compensating for other effects of transmission gaps, obtaining an approximate value of said target value variation, by approximation of said second component, and means for anticipatorily varying the transmission power by an amount corresponding to said approximate value of said target value variation. 16. A base station according to claim 15, wherein said transmission power control algorithm simultaneously controls the transmission power of at least two channels, including a data channel and a control channel, as a function of transmission quality target value, with the transmission power of said control channel offset relative to the transmission power of said data channel, said base station comprising: means for applying, in the event of target value variation, anticipated variations of at least one of the transmission power of the data channel, the transmission power of the control channel and the offset of the transmission power of the control channel relative to the transmission power of the data channel, to obtain said anticipatory variation of the transmission power of the data channel. 17. A base station according to claim 16, further comprising means such that, in the event of target value variation, said anticipatory variations cause the signal transmitted on the control channel to have the same power before and after said target value variation and over the same reference period. 18. A base station according to claim 15, comprising means for applying an anticipatory variation of the offset of the transmission power of the control channel relative to the transmission power of the data channel that corresponds to the opposite of said approximate value of the target value variation. 19. A base station according to claim 15, comprising means for applying an anticipatory variation of the transmission power of said data channel and the transmission power of said control channel that corresponds to said approximate value of the target value variation. 20. A base station according to claim 15, comprising means for using said second component which is signaled to it by a base station controller for the purposes of uplink power control to determine said approximate value of the downlink target value variation. 21. A base station according to claim 15, comprising means for obtaining an approximate value of said second component for the downlink, from the second component for the uplink. 22. A mobile station in which a power control algorithm controls an uplink transmission power as a function of a transmission quality target value, said mobile station comprising: means for, in the event of a target value variation applied to compensate for the effects of a compressed transmission mode in which transmission is interrupted during transmission gaps and the bit rate is increased correspondingly to compensate for the transmission gaps, wherein said target value variation includes a first component for compensating for the effects of said increased bit rate and a second component for compensating for other effects of transmission gaps, obtaining an approximate value of said target value variation, by approximation of said second component, and means for anticipatorily varying the transmission power by an amount corresponding to an approximate value of said target value variation. 23. A mobile station according to claim 22, further comprising means for using said second component which is signaled to it by a base station controller for the purposes of downlink power control to determine said approximate value of the uplink target value variation. 24. A mobile station according to claim 22, comprising means for obtaining an approximate value of said second component for the uplink, from the second component for the downlink. 25. A mobile station wherein a transmission power control algorithm simultaneously control the transmission power of at least two channels, including a data channel and a control channel, as a function of transmission quality target value, with the transmission power of said control channel offset relative to the transmission power of said data channel, said mobile station comprising: means for applying, in the event of target value variation, anticipated variations of at least one of the transmission power of the data channel, the transmission power of the control channel and the offset of the transmission power of the control channel relative to the transmission power of the data channel, to obtain an anticipated variation of the data channel transmission power; and means such that in the event of target value variation said anticipated variations cause the signal transmitted on the control channel to have the same power before and after said target variation and over the same reference period. 26. A mobile station wherein a transmission power control algorithm simultaneously control the transmission power of at least two channels, including a data channel and a control channel, as a function of transmission quality target value, with the transmission power of said control channel offset relative to the transmission power of said data channel, said mobile station comprising: means for applying, in the event of target value variation, anticipated variations of at least one of the transmission power of the data channel, the transmission power of the control channel and the offset of the transmission power of the control channel relative to the transmission power of the data channel, to obtain an anticipated variation of the data channel transmission power; and means for generating an approximate value of said target value variation, and wherein said means for applying applies an anticipated variation of the offset of the transmission power of the control channel relative to the transmission power of the data channel that corresponds to the opposite of said approximate value of the target value variation. 27. A mobile station wherein a transmission power control algorithm simultaneously control the transmission power of at least two channels, including a data channel and a control channel, as a function of transmission quality target value, with the transmission power of said control channel offset relative to the transmission power of said data channel, said mobile station comprising: means for applying, in the event of target value variation, anticipated variations of at least one of the transmission power of the data channel, the transmission power of the control channel and the offset of the transmission power of the control channel relative to the transmission power of the data channel, to obtain an anticipated variation of the data channel transmission power; and means for applying an anticipated variation of the transmission power of said data channel and the transmission power of said control channel that corresponds to said approximate value of the target value variation. 28. A base station controller for a mobile radio system in which a power control algorithm controls transmission power as a function of a transmission quality target value, and in which a target value variation is applied to compensate for the effects of a compressed transmission mode in which transmission is interrupted during transmission gaps and the bit rate is increased correspondingly to compensate for the transmission gaps, said target value variation including a first component for compensating the effects of said increased bit rate and a second component for compensating other effects of transmission gaps, said base station controller comprising means for signaling the same value for said second component for both transmission directions to a base station and to a mobile station. 29. A base station, comprising: means for controlling a downlink transmission power as a function of a transmission quality target value, means for using parameters signaled to said base station for the uplink, to determine a target value variation applied in compressed mode, and means for applying a power offset to said downlink transmission power, corresponding to the thus determined target value variation. 30. A base station according to claim 29, wherein said parameters signaled to said base station for the uplink include: a first parameter (DeltaSIR1, DeltaSIR2) for a compressed frame, and a second parameter (DeltaSIRafter1, DeltaSIRafter2) for frame following said compressed frame. 31. A base station according to claim 30, wherein said frame following said compressed frame is the second one of two consecutive compressed frames, with transmission gap beginning in the first one of said two frames and finishing in the second one of said two frames.
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이 특허에 인용된 특허 (11)
Dahlman Erik,SEX ; Willars Per Hans P.,SEX ; Grimlund Olof E.,SEX ; Ewerbring Lars-Magnus,SEX, Code-rate increased compressed mode DS-CDMA systems and methods.
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