USRE46027EExpiredUtility
Method and apparatus for transmit power control
Assignee: OPTIS WIRELESS TECHNOLOGY LLCPriority: Sep 30, 1999Filed: Dec 18, 2014Granted: Jun 7, 2016
Est. expirySep 30, 2019(expired)· nominal 20-yr term from priority
Inventors:Torgny Palenius
H04W 52/267H04W 52/16H04W 52/265
67
PatentIndex Score
1
Cited by
41
References
20
Claims
Abstract
Transmit power control is achieved by determining a data rate of at least a first channel and controlling the transmit power of the at least first channel based on the determined data rate. The transmit power may be adjusted based on a ratio of power between the at least first channel and a second channel, and the ratio may be adjusted based on the data rate of the first data channel. The first data channel may be a data channel, and the second data channel may be a control channel. The ratio is adjusted such that a power offset between the first channel and the second channel is proportional to the data rate of the first channel. The ratio may be adjusted based on the coding rate, data transmission rate, and/or a rate matching parameter. The transmit power may also be adjusted based on received power control commands. The transmit power may be adjusted in this manner in the uplink or the downlink direction.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A method for controlling transmit power, comprising the steps of:
determining a data rate of at least a first channel of a transmitter;
controlling the transmit power of the at least first channel based on the determined data rate using a power level controller; and
adjusting a ratio of power between the at least first channel and a second channel based on the data rate of the at least first data channel, wherein the transmit power of the at least first channel of the transmitter is controlled using the adjusted ratio.
2. The method of claim 1 , wherein the at least first data channel is a data channel, and the second data channel is a control channel.
3. The method of claim 1 , wherein the ratio is adjusted such that a power offset between the at least first channel and the second channel is proportional to the data rate of the at least first channel.
4. The method of claim 1 , wherein the ratio is adjusted based on the a coding rate of the at least first channel.
5. The method of claim 1 , wherein the ratio is adjusted based on the a data transmission rate of the at least first channel.
6. The method of claim 1 , wherein the ratio is adjusted based on a rate matching parameter of the at least first channel.
7. The method of claim 1 , further comprising receiving power control commands and adjusting the transmit power based on the received power control commands.
8. An apparatus for controlling transmit power, comprising:
means for determining a data rate of at least a first channel of a plurality of channels of a transmitter;
means for controlling the transmit power of the at least first channel of the plurality of channels based on the determined data rate; and
means for adjusting a ratio of power between the at least first channel of the plurality of channels of the transmitter and a second channel of the plurality of channels based on the data rate of the at least first channel, wherein the means for controlling the transmit power uses the adjusted ratio.
9. The apparatus of claim 8 , wherein the at least first data channel is a data channel, and the second data channel is a control channel.
10. The apparatus of claim 8 , wherein the ratio is adjusted such that power offset is proportional to the data rate of the at least first channel.
11. The apparatus of claim 8 , wherein the ratio is adjusted based on the a coding rate of the at least first channel.
12. The apparatus of claim 8 , wherein the ratio is adjusted based on the a data transmission rate of the at least first channel.
13. The apparatus of claim 8 , wherein the ratio is adjusted based on a rate matching parameter of the at least first channel.
14. The apparatus of claim 8 , further comprising means for adjusting the power of the at least first channel and second channel channels based on power control commands.
15. The method of claim 1, wherein:
the at least first channel is a Dedicated Physical Data Channel, the second channel is a Dedicated Physical Control Channel, adjusting the ratio comprises determining the adjusted ratio based on:
β
d
,
signaled
β
c
,
signaled
·
[
Σ
t
RM
t
·
N
t
]
current
[
Σ
t
RM
t
·
N
t
]
signaled
where β d,signaled is a signaled gain for the Dedicated Physical Data Channel, β c,signaled is a signaled gain for the Dedicated Physical Control Channel, RM t is a rate matching parameter for transport channel i, N t is a number of bits delivered from a radio frame segmentation unit for transport channel i, [Σ t RM t ·N t ] current is a summation for each transport channel i in the current transport format configuration of the Dedicated Physical Data Channel, and [Σ t RM t ·N t ] signaled is a summation for each transport channel i in a signaled transport format configuration of the Dedicated Physical Data Channel.
16. The method of claim 15, wherein determining the data rate comprises determining the data rate to be [Σ t RM t ·N t ] current , where RM t is a rate matching parameter for transport channel i, N t is a number of bits delivered from a radio frame segmentation unit for transport channel i, [Σ t RM t ·N t ] current is a summation for each transport channel i in a current transport format configuration of the Dedicated Physical Data Channel.
17. The apparatus of claim 8, wherein the means for determining the data rate comprise a signal interference ratio and quality measurement unit, the means for controlling transmit power of the at least first channel comprise a power level controller, and the means for adjusting the ratio comprise a processor.
18. The apparatus of claim 17, wherein:
the at least first channel is a Dedicated Physical Data Channel, the second channel is a Dedicated Physical Control Channel, adjusting the ratio comprises determining the adjusted ratio based on:
β
d
,
signaled
β
c
,
signaled
·
[
Σ
t
RM
t
·
N
t
]
current
[
Σ
t
RM
t
·
N
t
]
signaled
,
where β d,signaled is a signaled gain for the Dedicated Physical Data Channel, β c,signaled is a signaled gain for the Dedicated Physical Control Channel, RM t is a rate matching parameter for transport channel i, N t is a number of bits delivered from a radio frame segmentation unit for transport channel i, [Σ t RM t ·N t ] current is a summation for each transport channel i in the current transport format configuration of the Dedicated Physical Data Channel, and [Σ t RM t ·N t ] signaled is a summation for each transport channel i in a signaled transport format configuration of the Dedicated Physical Data Channel.
19. The apparatus of claim 18, wherein determining the data rate comprises determining the data rate to be [Σ t RM t ·N t ] current , where RM t is a rate matching parameter for transport channel i, N t is a number of bits delivered from a radio frame segmentation unit for transport channel i, [Σ t RM t ·N t ] current is a summation for each transport channel i in a current transport format configuration of the Dedicated Physical Data Channel.
20. The apparatus of claim 8, wherein:
the at least first channel is a Dedicated Physical Data Channel, the second channel is a Dedicated Physical Control Channel, adjusting the ratio comprises determining the adjusted ratio based on:
β
d
,
signaled
β
c
,
signaled
·
[
Σ
t
RM
t
·
N
t
]
current
[
Σ
t
RM
t
·
N
t
]
signaled
,
where β d,signaled is a signaled gain for the Dedicated Physical Data Channel, β c,signaled is a signaled gain for the Dedicated Physical Control Channel, RM t is a rate matching parameter for transport channel i, N t is a number of bits delivered from a radio frame segmentation unit for transport channel i, [Σ t RM t ·N t ] current is a summation for each transport channel i in the current transport format configuration of the Dedicated Physical Data Channel, and [Σ t RM t ·N t ] signaled is a summation for each transport channel i in a signaled transport format configuration of the Dedicated Physical Data Channel.Join the waitlist — get patent alerts
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