CA2548401A1 - Apparatus and method for prioritized apportionment of transmission power in a multi-carrier terminal - Google Patents

Apparatus and method for prioritized apportionment of transmission power in a multi-carrier terminal Download PDF

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Publication number
CA2548401A1
CA2548401A1 CA002548401A CA2548401A CA2548401A1 CA 2548401 A1 CA2548401 A1 CA 2548401A1 CA 002548401 A CA002548401 A CA 002548401A CA 2548401 A CA2548401 A CA 2548401A CA 2548401 A1 CA2548401 A1 CA 2548401A1
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Canada
Prior art keywords
carrier
power
voice
signal
data
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Granted
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CA002548401A
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French (fr)
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CA2548401C (en
Inventor
Juan Montojo
Naga Bhushan
Peter John Black
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Qualcomm Inc
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Individual
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Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/005—Control of transmission; Equalising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2637—Modulators with direct modulation of individual subcarriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/281—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission taking into account user or data type priority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers

Abstract

In a multi-carrier access terminal having a transmitter with a single power amplifier, maximum transmission power available for a multi-carrier signal transmitted by the terminal is apportioned among a plurality of carriers on a priority basis. Following apportionment, the carriers are combined into a multi-carrier signal, amplified by the power amplifier and transmitted.</SDO AB>

Claims (22)

1. A transmitter for a multi-carrier terminal, comprising:
a first transmission circuit for providing a first carrier for a first channel;
at least a second transmission circuit for providing at least a second carrier for a second channel;
a combiner connected to the transmission circuits for combining the first carrier and at least the second carrier into a multi-carrier signal;
a power amplifier connected to the combiner for amplifying the multi-carrier signal; and a processor connected to the power detector and to the transmission circuits for apportioning power available for the amplified multi-carrier signal between the first and second carriers according to a carrier priority.
2. The transmitter of claim 1, wherein the first carrier has a higher priority than the second carrier in the carrier priority.
3. The transmitter of claim 1, wherein the carrier priority allocates to the first carrier a first carrier portion of the transmission power, and allocates to the second carrier a second carrier portion of the transmission power, the second carrier portion being based on the power available for the multi-carrier signal reduced by the first carrier portion.
4. The transmitter of claim 3, wherein the processor has an input for receiving an operational mode signal indicating whether or not the first channel is in an active state, wherein the carrier priority allocates the first carrier portion if the first channel is in an active state.
5. The transmitter of claim 4, wherein the carrier priority further allocates the first carrier portion if the first channel is in a connection setup state.
6. The transmitter of claim 5, wherein the power available for the multi-carrier signal is limited to a maximum value by a terminal emission constraint.
7. A transmitter for a multi-carrier terminal, comprising:

a voice transmission circuit for providing a voice carrier for a voice channel;
at least one data transmission circuit for providing a at least one data carrier for a data channel;
a combiner connected to the voice transmission circuit and the at least one data transmission circuit for combining the voice carrier and at least the one data carrier into a multi-carrier signal;
a power amplifier connected to the combiner;
a power detector connected to the power amplifier for measuring a power level of an amplified multi-carrier signal produced by the power amplifier;
and a processor connected to the power detector, the voice transmission circuit, and the at least one data transmission circuit for apportioning a maximum amount of transmission power available for the multi-carrier signal between the voice carrier and the one data carrier in a first operational mode of the terminal by first allocating a voice carrier portion of the transmission power to the voice carrier and then allocating a data carrier portion of the transmission power by:
MaxDataPower=[MaxTxPowerAnalog-TxAnalogPower]+
[TxPilotPower* T2P(rate)]-MarginForVoice where:
MaxDataPower is maximum power allocated to the one data carrier;
MaxTxPowerAnalog is a maximum level of power available to the voice carrier;
TxAnalogPower is the power level of an amplified multi-carrier signal power measured by the power detector;
TxPilotPower is the power level of a pilot signal of the data channel;
T2P(rate) is a gain to translate the power of the pilot signal to overall signal power; and MarginForVoice is a margin of power reserved for the voice carrier.
8. The transmitter of claim 7, wherein the voice channel and the data channel are both active in the first operational mode, and the processor is further for apportioning the maximum amount of transmission power available for the multi-carrier signal between the voice carrier and the one data carrier according to a second operational mode of the terminal by:
MaxDataPower=[MaxTxPowerAnalog-TxAnalogPower]-MarginForVoice where the voice channel is in an active state and the data channel is in a connection setup state in the second operational mode.
9. The transmitter of claim 8, the processor is further for apportioning the maximum amount of transmission power available for the multi-carrier signal between the voice carrier and the one data carrier according to a third operational mode of the terminal in which the data channel is the active state by:
MaxDataPower=[MaxTxPowerAnalog-TxAnalogPower]+
[TxPilotPower* T2P(rate)]-MarginForVoice where MarginForVoice is set to zero while the voice channel is in an idle stated and is set to a maximum value when the voice channel is in the connection setup state.
10. The transmitter of claim 9, wherein MaxTxPowerAnalog has a maximum value based on a spectral emission constraint.
11. A method of operating a multi-carrier access terminal for a wide area network, comprising:
providing a maximum amount of transmission power for a multi-carrier signal to be transmitted by the terminal;
providing a first carrier for transmitting first information;
providing at least a second carrier for transmitting second information;
combining the first carrier and at least the second carrier into a multi-carrier signal;
apportioning the transmission power for the multi-carrier signal between the first and second carriers according to a carrier priority; and transmitting the multi-carrier signal at a power no greater then the maximum amount.
12. The method of claim 11, wherein the first carrier has a higher priority than the second carrier in the carrier priority.
13. The method of claim 11, wherein the carrier priority allocates to the first carrier a first carrier portion of the transmission power, and allocates to the second carrier a second carrier portion of the transmission power, the second carrier portion being based on the power available for the multi-carrier signal reduced by the first carrier portion.
14. The method of claim 13, wherein the terminal has an operational mode indicating whether or not the first carrier is in an active state, wherein the carrier priority allocates the first carrier portion if the first carrier is in an active state.
15. The method of claim 14, wherein the carrier priority further allocates the second carrier portion if the second carrier is in an active state.
16. The method of claim 15, wherein the power available for the multi-carrier signal is limited to a maximum value by a terminal emission constraint.
17. A method for controlling transmission power in a multi-carrier terminal, comprising:
providing a voice carrier for a voice channel;
providing a at least one data carrier for a data channel;
combining the voice carrier and at least the one data carrier into a multi-carrier signal;
amplifying the multi-channel carrier signal;
measuring a power level of the amplified multi-carrier signal; and apportioning a maximum amount of transmission power available for the multi-carrier signal between the voice carrier and the one data carrier in a first operational mode of the terminal by first allocating a voice carrier portion of the transmission power to the voice carrier and then allocating a data carrier portion of the transmission power by:
MaxDataPower=[MaxTxPowerAnalog-TxAnalogPower]+
[TxPilotPower* T2P(rate)]-MarginForVoice where:
MaxDataPower is maximum power allocated to the one data carrier;
MaxTxPowerAnalog is a maximum level of power available to the voice carrier;
TxAnalogPower is the measured power level of an amplified multi-carrier signal power;
TxPilotPower is the power level of a pilot signal of the data channel;
T2P(rate) is a gain to translate the power of the pilot signal to overall signal; and MarginForVoice is a margin of power reserved for the voice carrier.
18. The method of claim 17, wherein the voice channel and the data channel are both active in the first operational mode, further including apportioning the maximum amount of transmission power available for the multi-carrier signal between the voice carrier and the one data carrier according to a second operational mode of the terminal by:
MaxDataPower=[MaxTxPowerAnalog-TxAnalogPower]-MarginForVoice where the voice channel is in an active state and the data channel is in a connection setup state in the second operational mode.
19. The method of claim 18, further including apportioning the maximum amount of transmission power available for the multi-carrier signal between the voice carrier and the one data carrier according to a third operational mode of the terminal in which the data channel is the active state by:
MaxDataPower=[MaxTxPowerAnalog-TxAnalogPower]+
[TxPilotPower* T2P(rate)]-MarginForVoice where MarginForVoice is set to zero while the voice channel is in an idle state, and is set to a maximum value when the voice channel is in the connection setup state.
20. The transmitter of claim 19, wherein MaxTxPowerAnalog has a maximum value based on a spectral emission constraint.
21. A method of operating a transmitter having a power amplifier, comprising:
providing a maximum amount of transmission power for a multi-carrier signal to be transmitted by the transmitter;
providing a plurality of carriers for transmitting information;
apportioning the transmission power for a multi-carrier signal between the carriers according to a carrier priority;
combining carriers of the plurality of carriers into a multi-carrier signal;
amplifying the multi-carrier signal with the power amplifier; and transmitting the multi-carrier signal at a power no greater then the maximum amount.
22. The method of claim 21, wherein the maximum amount of transmission power (MaxTxPower) is apportioned to a carrier y of the plurality of carriers according to:
MaxPowerCarrier y = MaxTxPowerAnalog - (PowerCarrier i) - Margin where MaxPowerCarrier y is the maximum amount of power available for carrier y, Margin is a margin of power having a value equal to or greater than zero, and (PowerCarrier i) is the total transmission power apportioned to carriers of the plurality of carriers having higher priorities than the carrier y.
CA2548401A 2003-12-17 2004-11-30 Apparatus and method for prioritized apportionment of transmission power in a multi-carrier terminal Active CA2548401C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/739,964 US7411930B2 (en) 2003-12-17 2003-12-17 Apparatus and method for prioritized apportionment of transmission power in a multi-carrier terminal
US10/739,964 2003-12-17
PCT/US2004/040164 WO2005062492A1 (en) 2003-12-17 2004-11-30 Apparatus and method for prioritized apportionment of transmission power in a multi-carrier terminal

Publications (2)

Publication Number Publication Date
CA2548401A1 true CA2548401A1 (en) 2005-07-07
CA2548401C CA2548401C (en) 2011-07-19

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US (1) US7411930B2 (en)
EP (2) EP1698070B1 (en)
JP (1) JP4481998B2 (en)
KR (1) KR100816307B1 (en)
CN (2) CN100583672C (en)
AT (1) ATE484110T1 (en)
BR (1) BRPI0417676A (en)
CA (1) CA2548401C (en)
DE (1) DE602004029495D1 (en)
ES (1) ES2351698T3 (en)
HK (1) HK1099430A1 (en)
MX (1) MXPA06006915A (en)
PL (1) PL1698070T3 (en)
TW (1) TWI375417B (en)
WO (1) WO2005062492A1 (en)

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