WO2012020540A1 - 無線通信端末装置及び無線通信方法 - Google Patents
無線通信端末装置及び無線通信方法 Download PDFInfo
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- WO2012020540A1 WO2012020540A1 PCT/JP2011/003980 JP2011003980W WO2012020540A1 WO 2012020540 A1 WO2012020540 A1 WO 2012020540A1 JP 2011003980 W JP2011003980 W JP 2011003980W WO 2012020540 A1 WO2012020540 A1 WO 2012020540A1
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- transmission power
- phr
- grant
- wireless communication
- pusch
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- 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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- 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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- 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
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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- 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
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- 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
- H04W52/06—TPC algorithms
- H04W52/16—Deriving transmission power values from another channel
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- 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
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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- 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
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/262—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account adaptive modulation and coding [AMC] scheme
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- 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
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/365—Power headroom reporting
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- 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
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0028—Formatting
- H04L1/0031—Multiple signaling transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- 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
Definitions
- the present invention relates to a wireless communication terminal device and a wireless communication method for notifying PHR (Power headroom).
- PHR Power headroom
- LTE-advanced studies are underway.
- introduction of a band expansion technique called carrier aggregation is under consideration.
- CC component carrier
- UL uplink
- LTE-advanced consideration is given to the introduction of five CCs, that is, band expansion up to 100 MHz.
- 3GPP LTE LTE Rel The transmission power control of the 8 UL channels (PUSCH: PhysicalPhysUplink Shared CHannel) is a control method that uses both closed-loop control and open-loop control, so the path loss value used for setting the UL transmission power is: , And estimated from the reference signal received by the terminal in DL. Therefore, the base station generally does not know the exact path loss value used for setting the UL transmission power.
- PUSCH PhysicalPhysUplink Shared CHannel
- a value that depends on the terminal implementation for example, MPR (Maximum power reduction) that depends on the RF implementation of the terminal
- MPR Maximum power reduction
- the base station needs information for knowing the actual transmission power of the terminal.
- 3GPP LTE Rel. 8 information on transmission power remaining capacity at a terminal called PHR is notified using an UL channel (specifically, PUSCH, etc.) from the terminal to the base station.
- 3GPP LTE Rel. 8 PHR (the following equation (2)) is defined by the difference between the maximum transmission power of the terminal and the transmission power value of the PUSCH (the following equation (1)).
- P cmax is the maximum transmission power for each CC
- M PUSCH (i) is the allocated bandwidth of PUSCH
- P 0_PUSCH (j) and ⁇ (j) are reported from the base station in the upper layer.
- PL is a path loss estimation value estimated by the terminal
- ⁇ TF (j) is an offset value related to MCS (Modulation and channel Coding Set)
- f (i) is a TPC command (TPC (Transmit Power Control) command)
- TPC Transmit Power Control
- the terminal notifies the PHR to the base station, and the base station appropriately performs link adaptation and time-frequency scheduling using the PHR notified from each terminal.
- PHR notification method for UL carrier aggregation
- PHR is notified for each CC, and the following two types are defined as PHR for each CC.
- Type 1 Pcmax-PUSCH transmission power (P_cmax minus PUSCH power)
- Type 2 Pcmax-PUCCH transmission power-PUSCH transmission power (P_cmax minus PUCCH power minus PUSCH power)
- Format 1A is used as a reference format and used for PHR calculation.
- PUCCH Physical Uplink Control Channel
- the actual format notified from the base station to the terminal is used for transmission power and PHR calculation.
- Pcmax indicates the maximum transmission power of the terminal for each CC.
- Type 1 is mainly intended for CCs that do not transmit PUCCH and PUSCH simultaneously, and 3GPP LTE Rel. Similarly to the definition of 8, it is defined by the difference value between the maximum transmission power for each CC and the transmission power of PUSCH.
- Type 2 mainly targets CCs that can simultaneously transmit PUCCH and PUSCH, and is defined by a value obtained by subtracting the total transmission power of PUCCH and PUSCH from the maximum transmission power for each CC. .
- PUSCH allocation As information related to UL grant (UL grant (transmission format)) notified by the physical layer DL control channel (PDCCH: Physical Downlink Control CHannel) in Equation (1) and Equation (2), PUSCH allocation There is bandwidth information (M PUSCH (i)), an offset value ( ⁇ TF (j)) related to MCS, a cumulative value (f (i)) of TPC commands, and the like.
- bandwidth information M PUSCH (i)
- ⁇ TF (j) offset value
- f (i) cumulative value of TPC commands
- the PUSCH of the CC surrounded by a dotted line indicates the PUSCH without UL grant (without transmission), the shaded PUSCH with UL grant (with transmission), and the hatched line indicates the PUCCH.
- the PUSCH of the CC surrounded by the dotted line corresponds to the PUSCH that uses the reference format for calculating the PHR of the corresponding CC
- the shaded PUSCH corresponds to the PUSCH that uses the UL grant to calculate the PHR of the corresponding CC.
- the PUSCH transmission power and PHR are calculated according to equations (1) and (2).
- Information such as the bandwidth information M PUSCH (i) and ⁇ TF (j) in the equations (1) and (2) is calculated based on the (reference) format of the UL grant.
- Non-Patent Document 1 the definition of the reference format of PUSCH without UL grant (without transmission) is currently being studied and is described in Non-Patent Document 1.
- the UL grant in the past TTI (Transmission Time Interval) notified from the base station to the terminal is used as the reference format of the transmission power of the PUSCH of the current TTI, An approach to calculate the current TTI transmit power and PHR is described.
- TTI Transmission Time Interval
- Non-Patent Document 1 has the following problems.
- the base station determines that the terminal has failed. Cannot recognize time. For this reason, a difference occurs in recognition of the UL grant reference format used for PHR calculation between the terminal and the base station.
- the base station erroneously recognizes the actual transmission power information of the terminal (PHR which is transmission power surplus information), and the base station based on the erroneous PHR information, Scheduling, link adaptation, or resource allocation is performed for each CC or between CCs.
- PHR transmission power surplus information
- An object of the present invention is to provide a wireless communication terminal device and a wireless communication method for preventing a recognition shift that a different UL grant reference format is recognized with a wireless communication base station device.
- the radio communication terminal apparatus of the present invention is a radio communication terminal apparatus that transmits a transmission power reserve for each unit carrier in the uplink, and uses the parameter information used to calculate the transmission power reserve of the uplink channel, Transmission power remaining capacity calculating means for calculating, for each unit carrier, transmission power or transmission power remaining capacity of another uplink channel in which no signal is transmitted, and the calculated transmission power or transmission power remaining capacity of the other uplink channel And a transmission means for transmitting.
- the radio communication method of the present invention is a radio communication method for transmitting the transmission power reserve of the radio communication terminal apparatus for each unit carrier in the uplink, using the parameter information used for calculating the transmission power reserve of the uplink channel. Calculating, for each unit carrier, transmission power or transmission power margin of another uplink channel in which no uplink allocation signal is transmitted, and transmitting the calculated transmission power or transmission power margin of the other uplink channel; I did it.
- the present invention it is possible to prevent a recognition error that a different UL grant reference format is recognized between the wireless communication terminal device and the wireless communication base station device.
- FIG. 1 is a block diagram showing a configuration of a wireless communication terminal apparatus according to Embodiment 1 of the present invention.
- the figure which shows the format structure example after multiplexing The block diagram which shows the structure of the radio
- movement of the PHR calculation part of the terminal shown in FIG. The figure for demonstrating other operation
- movement of the PHR calculation part of the terminal shown in FIG. The figure for demonstrating other operation
- movement of the PHR calculation part of the terminal shown in FIG. The figure for demonstrating other operation
- movement of the PHR calculation part of the terminal shown in FIG. The figure where it uses for description of operation
- FIG. 3 is a block diagram showing a configuration of radio communication terminal apparatus (hereinafter simply referred to as “terminal”) 100 according to Embodiment 1 of the present invention.
- terminal radio communication terminal apparatus
- the radio reception processing unit 102 receives the OFDM signal transmitted from the base station via the antenna 101, performs predetermined radio reception processing such as down-conversion and A / D conversion on the received OFDM signal, To 103.
- the OFDM demodulator 103 removes the guard interval from the received OFDM signal output from the radio reception processor 102, performs discrete Fourier transform (DFT), and converts it to a frequency domain signal.
- the OFDM demodulator 103 performs frequency domain equalization (FDE) on each component in the frequency domain, removes signal distortion, and outputs a data signal to a data demodulator / decoder not shown. Then, a control signal (for example, PDCCH including UL grant) is output to the demodulation unit 104.
- FDE frequency domain equalization
- Demodulation section 104 subjects the control signal output from OFDM demodulation section 103 to predetermined demodulation processing for a modulation scheme such as QPSK or 16QAM, and outputs the result to channel decoding section 105.
- a modulation scheme such as QPSK or 16QAM
- the channel decoding unit 105 performs decoding processing (repeated MAP decoding, Viterbi decoding) on error correction coding such as turbo coding and convolution coding performed by the base station on the control signal output from the demodulation unit 104, and extracts the control signal To the unit 106.
- decoding processing peerated MAP decoding, Viterbi decoding
- error correction coding such as turbo coding and convolution coding
- the extraction unit 106 uses the UL grant (allocation bandwidth, MCS set, TPC command, etc.) and UCI (Uplink Control Information) information (ACK / NACK, RI) that are uplink allocation signals from the control information output from the channel decoding unit 105.
- UCI Uplink Control Information
- ACK / NACK, RI Uplink Control Information
- Rank Indicator Rank Indicator
- CQI Channel Quality Indicator
- CSI Channel State Information
- PMI Precoding Matrix Indicator
- the PHR control unit 107 includes a TB (CC) selection unit 108 and a PHR calculation unit 109.
- the TB (CC) selection unit 108 is input for each CC (or common to multiple CCs or common to all CCs).
- PHR trigger information CQI for each CC, path loss information for each CC, CC cell information (Pcell: Primary cell (PCC: Primary component carrier), Scell: Secondary Cell (SCC: Secondary component carrier)), UL grant, UCI Based on information such as ACK / NACK, RI, CQI, CSI, PMI, CC frequency (CC carrier frequency level information), TB (TransportCCBlock) for multiplexing PHR is selected (where PHR is Triggered cases include timer-based methods and path loss-based methods).
- the TB (CC) selection unit 108 is transmitted with the CC having the best quality (the reception quality (SINR) at the base station is good) based on the path loss information (or the frequency for each input CC). Is selected as a TB to which PHR which is important control information is multiplexed. And the reference format (UL grant) of CC (PUSCH) by which the selected TB is transmitted is specified. As described above (formula (1) or formula (2)), the reference format information includes bandwidth information, MCS information, path loss information, TPC command information, parameter information notified in an upper layer, and the like.
- the TB (CC) selection unit 108 outputs to the PHR calculation unit 109 the TB (CC, codeword) information for multiplexing the PHR and the reference format (UL grant) of the CC, TB, and codeword.
- the PHR calculating unit 109 based on the input maximum transmission power information (power class, MPR, etc.) for each CC, UL grant with PUSCH allocation, UCI information, and information input from the TB (CC) selection unit 108, The PHR for each CC is calculated.
- PHR calculation section 109 uses PUSCH transmission power using equation (1) based on the reference format (UL grant) output from TB (CC) selection section 108. (If there is PUCCH transmission within the same CC, the transmission power of PUCCH is also calculated).
- the PHR calculation unit 109 calculates the PHR for each CC by subtracting the transmission power of PUSCH (and the transmission power of PUCCH) from the maximum transmission power for each CC.
- CC PUSCH
- transmission power and PHR for each CC are calculated based on the UL grant for the corresponding PUSCH.
- the calculated PHR for each CC is output to the TB (CC) selection unit 108.
- the TB (CC) selection unit 108 multiplexes the input PHR for each CC to the TB (CC, codeword, MAC PDU) for multiplexing a plurality of PHRs for each CC selected in advance.
- the PHR for each CC is output to multiplexing sections 110-1 to 110-N corresponding to each TB.
- the input PHRs for each of the plurality of CCs may all be multiplexed on one TB, or may be multiplexed on a plurality of TBs.
- Multiplexers 110-1 to 110-N multiplex PHR for each CC with respect to input MAC SDU (RLC (Radio Link Control) PDU), and send to channel encoders 111-1 to 111-N. Output.
- MAC SDU Radio Link Control
- FIG. 4 shows an example of the format structure after multiplexing.
- FIG. 4A shows an example in which the PHRs of N CCs are multiplexed in the third MAC control.
- the structure which multiplexes PHR for every CC to two or more MAC control may be sufficient.
- FIG. 4B when multiple PHRs for each antenna (layer, codeword) for each CC are multiplexed, the PHRs for each antenna may be grouped for each CC and multiplexed into one MAC control. Conceivable.
- the configuration is such that a plurality of PHRs for each CC and for each antenna (layer, codeword) are notified using a plurality of MAC controls in one transport block (TB).
- the configuration may be such that the PHR of the entire terminal is multiplexed at the same time.
- the PHR (Per UE PHR) of the entire terminal is generally defined by a value obtained by subtracting the total transmission power value of all CCs (channels) from the maximum transmission power of the entire terminal. Then, multiplexing sections 110-1 to 110-N output PHR multiplexed on TB (MAC PDU) to channel encoding sections 111-1 to 111-N in the physical layer.
- a plurality of processing units, control units, and the like exist between the MAC layer multiplexing units 110-1 to 110-N and the physical layer channel encoding units 111-1 to 111-N. Because it is omitted.
- Channel coding sections 111-1 to 111-N perform error correction coding such as turbo coding on the TBs output from multiplexing sections 110-1 to 110-N, and perform modulation sections 112-1 to Output to 112-N.
- Modulating sections 112-1 to 112-N perform predetermined modulation processing such as QPSK and 16QAM on the signals output from channel coding sections 111-1 to 111-N, and SC-FDMA modulating sections 113-1 to 113-N. To 113-N.
- predetermined modulation processing such as QPSK and 16QAM
- SC-FDMA modulating sections 113-1 to 113-N To 113-N.
- SC-FDMA modulators 113-1 to 113-N perform precoding by performing DFT on the symbol sequences output from modulators 112-1 to 112-N. Then, the DFT precoding signal is mapped to a predetermined frequency resource instructed by the base station, and subjected to IDFT (Inverse Discrete Fourier Transform) to convert it into a time domain signal (SC-FDMA signal). Further, SC-FDMA modulation sections 113-1 to 113-N add a guard interval to the SC-FDMA signal and output it to combining section 114.
- IDFT Inverse Discrete Fourier Transform
- the combining unit 114 combines the SC-FDMA signals for each CC output from the SC-FDMA modulation units 113-1 to 113-N, and outputs the combined signals to the radio transmission processing unit 115.
- the wireless transmission processing unit 115 performs predetermined wireless transmission processing such as D / A conversion, amplification processing, and up-conversion on the SC-FDMA signal output from the combining unit 114, and transmits the result via the antenna 101.
- FIG. 5 is a block diagram showing a configuration of radio communication base station apparatus (hereinafter simply referred to as “base station”) 200 according to Embodiment 1 of the present invention.
- base station radio communication base station apparatus
- the radio reception processing unit 202 receives the SC-FDMA signal transmitted from the terminal via the antenna 201, performs predetermined radio reception processing such as down-conversion and A / D conversion, and outputs the signal to the separation unit 203.
- the demultiplexing unit 203 demultiplexes the SC-FDMA signal output from the radio reception processing unit 202 for each CC, and outputs it to the SC-FDMA demodulation units 204-1 to 204-N for each CC.
- SC-FDMA demodulation units 204-1 to 204-N remove the guard interval from the SC-FDMA signal output from the separation unit 203, perform DFT, and convert it to a frequency domain signal.
- SC-FDMA demodulation units 204-1 to 204-N perform frequency domain equalization on each component in the frequency domain to remove signal distortion, and perform IDFT to convert it into a time domain signal. And output to the demodulating units 205-1 to 205-N.
- Demodulation units 205-1 to 205-N perform predetermined demodulation processing on the modulation schemes such as QPSK and 16QAM on the signals output from SC-FDMA demodulation units 204-1 to 204-N, and channel decoding units Output to 206-1 to 206-N.
- Channel decoding sections 206-1 to 206-N perform decoding processing (repetition processing) on error correction coding such as turbo coding and convolutional coding performed on the terminals of the signals output from demodulation sections 205-1 to 205-N.
- decoding processing repetition processing
- error correction coding such as turbo coding and convolutional coding
- MAP decoding and Viterbi decoding MAP decoding and Viterbi decoding
- a plurality of processing units, control units, and the like exist between the MAC layer separation units 207-1 to 207-N and the physical layer channel decoding units 206-1 to 206-N. Therefore, it is omitted.
- the demultiplexing units 207-1 to 207-N demultiplex the MAC ⁇ ⁇ control including the PHR information multiplexed in the TB (MAC PDU) output from the channel decoding units 206-1 to 206-N, and the separated MAC control.
- the data is output to the TB (CC) determination unit 209 of the PHR control unit 208.
- the MAC SDU is output to a control unit (not shown).
- the TB (CC) determination unit 209 multiplexes PHR information (per CC, per antenna, entire terminal (Per UE)) from the MAC control of multiple TBs output from the demultiplexing units 207-1 to 207-N. TB (CC, code word) is detected.
- the TB (CC) determination unit 209 includes a reference format (UL) of the TB (CC, codeword) in which the detected PHR is multiplexed and the TB (CC, codeword) that the base station has previously notified to the terminal. Is output to the PHR extraction unit 210.
- the PHR extraction unit 210 extracts PHR information from the TB (CC, codeword) on which the PHR output from the TB (CC) determination unit 209 is multiplexed.
- the PHR extraction unit 209 uses the reference format (UL grant) of the TB (CC, codeword) used for calculating the PHR, the maximum transmission power information, and the extracted PHR for each CC of the corresponding CC from the extracted PHR for each CC.
- the path loss information and the TPC command error information are detected (or estimated), and the information is output to the scheduling unit 211.
- the scheduling unit 211 determines parameters for scheduling and link adaptation based on transmission power remaining capacity information, path loss information, TPC command error information, CQI, interference, etc. for each CC output from the PHR extraction unit 210.
- the determined parameters are output to the control information generating unit 212.
- Parameters determined here include UL grant (allocated bandwidth, MCS set, TPC command, etc.), RI (Rank Indicator), PMI (Precoding Matrix Indicator) information, and the like.
- the control information generation unit 212 converts the parameter output from the scheduling unit 211 into binary control information bits and outputs the binary control information bit to the channel encoding unit 213-1.
- the channel coding unit 213-1 performs error correction coding such as turbo coding on the control bit information output from the control information generation unit 212, and outputs the result to the modulation unit 214-1.
- Modulation section 214-1 performs predetermined modulation processing such as QPSK and 16QAM on the signal output from channel coding section 213-1 and outputs the result to OFDM modulation section 215.
- the transmission data signal is also subjected to the same processing as described above in channel encoding section 213-2 and modulation section 214-2.
- the OFDM modulation unit 215 maps the control signal output from the modulation unit 214-1 and the data signal output from the modulation unit 214-2 to a predetermined frequency resource, and performs IDFT to a time domain signal (OFDM signal). Convert.
- the OFDM modulation unit 215 adds a guard interval to the OFDM signal and outputs it to the radio transmission processing unit 216.
- the radio transmission processing unit 216 performs predetermined radio transmission processing such as D / A conversion, amplification processing, and up-conversion on the OFDM signal output from the OFDM modulation unit 215, and transmits the result via the antenna 201.
- predetermined radio transmission processing such as D / A conversion, amplification processing, and up-conversion on the OFDM signal output from the OFDM modulation unit 215, and transmits the result via the antenna 201.
- CC # 0 is a primary cell (Pcell, primary unit band (PCC: PrimaryPrimComponent Carrier)), CC # 1, and CC # 2.
- Pcell primary unit band
- SCC Secondary Component Carrier
- the CC PUSCH surrounded by a dotted line indicates a PUSCH without UL grant (without transmission), a shaded PUSCH with UL grant (with transmission), and a hatched line indicates PUCCH.
- the 3CC PHR is fed back simultaneously at each timing of the subframe numbers # 1, # 4, and # 7.
- the PUSCH UL grant of the CC transmitting the PHR is used to calculate the PUSCH PHR in the CC without the UL grant.
- the UL grant of CC # 0 is used to calculate the PHR of CC # 2 without the UL grant.
- the UL grant of CC # 2 is used to calculate the PHR of CC # 1 without UL grant.
- the UL grant of CC # 1 is used to calculate the PHR of CC # 0 without UL grant.
- UL grant used for calculation of PHR in other CC with the same transmission timing (subframe number) as the said PUSCH is used for PHR calculation of PUSCH in CC without UL grant.
- the same UL grant is shared between different CCs (between frequencies).
- the fact that the PHR of a PUSCH with a UL grant can be calculated is that the UL grant of the PUSCH can be received without fail, and by sharing such a UL grant, It is possible to prevent a recognition error in which different UL grants are recognized between the terminal and the base station.
- the terminal can use different characteristics for the UL grant used to calculate the PHR of the CC (uplink channel) that transmits the PHR by using the feature that the CC (PUSCH) that multiplexes the PHR can be selected from the PUSCH of multiple CCs. It is used as a reference format for calculating PHR between CCs (between frequencies). Accordingly, when there is a PUSCH UL grant in two or more CCs, the terminal preferentially uses a high-quality CC and transmits PHR which is important control information. As a reference format, it is possible to notify the base station of the probability that an error will occur in the uplink of multiple CCs including the PHR calculated using the reference format.
- the PHR notification timing If, at the PHR notification timing, reception of UL grants fails in all CCs, the PHR is not notified to the base station, and a recognition error that a different UL grant is recognized between the terminal and the base station. Does not occur.
- the base station can perform ULSCH even for PUSCH without UL grants. Similar to a PUSCH with a grant, a PHR can be acquired from a terminal without delay.
- PHR calculation for PUSCH in a CC without UL grant is performed by calculating PHR in another CC (transmitting PHR) at the same transmission timing (subframe number) as the PUSCH.
- the transmission power or transmission power capacity of other uplink channels for which no uplink allocation signal is transmitted is determined for each unit carrier.
- FIG. 6 the case where the same UL grant is shared between different frequencies (CC, codeword, TB) has been described.
- the present invention is not limited to this, and FIG. The case shown in FIG. 9 may be used.
- a case where the transmission power or transmission power reserve of another uplink channel to which UL grant is not transmitted is calculated using the parameter information used for calculating the transmission power reserve of the uplink channel that transmits PHR. Stated in the premise.
- FIG. 7 shows a case in which the PUSCH UL grant used for the transmission of the (closest) past PHR in the same CC as the CC is used for calculating the PUSCH PHR in the CC without the UL grant. That is, it is a case where the same UL grant is shared with the PUSCH UL grant used for PHR transmission between different subframes (time). Specifically, in CC # 0, the PUSCH UL grant used for transmission of the PHR of subframe number # 4 is used to calculate the PHR of subframe number # 7 without UL grant. Also, in CC # 1, the PUSCH UL grant used for transmission of the PHR of subframe number # 1 is used to calculate the PHR of subframe number # 4 without UL grant.
- FIG. 8 shows a case where a PUSCH UL grant used for PHR transmission in a CC different from the CC is used for PUSCH PHR calculation in a CC having no UL grant. That is, it is a case where the same UL grant is shared between different CCs (frequency) and between different subframes (time). Specifically, the UL grant of PUSCH used for the transmission of the PHR of CC # 2 and subframe number # 4 is used to calculate the PHR of CC # 0 and subframe number # 7 without UL grant. Also, the PUSCH UL grant used for transmission of the PHR of CC # 0 and subframe number # 1 is used to calculate the PHR of CC # 1 and subframe number # 4 without UL grant.
- CC # 2 UL grant is used for CC # 0 PHR calculation
- CC # 0 UL grant is used for CC # 1 PHR calculation.
- the CC # 1 UL grant may be used for CC # 0 PHR calculation
- the terminal that calculates the PHR can know the UL grant of the CC to be referenced before the current TTI (Transmission Time Interval), and thus can suppress an increase in time required for calculating the PHR.
- FIG. 9 shows a case where the UL grant of the primary cell is preferentially used for the PUSCH PHR calculation in the CC without the UL grant. This is due to the following reason. Since the CC that can use the PUCCH used only for transmitting control information without retransmission is limited to the primary cell, there is a high possibility that the CC in which the primary cell is set is set to a high-quality channel. Therefore, there is a high possibility that the primary cell is selected as the CC used for PHR notification that is important control information to be notified using the MAC layer. That is, the past UL grant of the shared primary cell has a low probability of becoming old information. Therefore, the terminal can calculate the PHR based on the latest UL grant as instructed from the base station, and can notify the base station of the latest PHR. In addition, the base station does not need to hold a plurality of old UL grants.
- the UL grant in CC # 0 having the same subframe number may be used as the shared UL grant.
- the UL grant used for the PHR calculation of CC # 2 and subframe number # 4 the UL grant of CC # 0 and subframe number # 4 may be used.
- the UL grant used for calculating the PHR of CC # 1 and subframe number # 7 the UL grant of CC # 0 and subframe number # 7 may be used.
- UL grant information referred to for calculating the PHR of a CC without an UL grant includes a bandwidth, an MCS, a TPC command, and the like. All of this information may be used for PHR calculation, or PHR may be calculated with reference to at least one of the information.
- Embodiment 2 In the second embodiment of the present invention, a case where MIMO (Multiple Input Multiple Output) transmission is performed in a CC that transmits PHR will be described.
- the configuration of the terminal and the base station according to Embodiment 2 of the present invention is the same as the configuration shown in FIG. 3 and FIG. 5 of Embodiment 1, and only some of the functions thereof are different. Different functions will be described with reference to FIGS.
- the transmission power or transmission power reserve of another uplink channel to which UL grant is not transmitted is transmitted using the parameter information used to calculate the transmission power reserve of the uplink channel that transmits PHR. This is described assuming that
- CC # 0 is a primary cell (Pcell or PCC (PrimaryPrimcomponent carrier)), and CC # 1 and CC # 2 are secondary.
- PCC PrimaryPrimcomponent carrier
- Scell or SCC Secondary component carrier
- the PUSCH of the CC surrounded by a dotted line indicates a PUSCH without UL grant (without transmission), and the shaded PUSCH indicates a PUSCH with UL grant (with transmission).
- the codeword numbers # 0 and # 1 are transmitted using two spatial resources (layers).
- the UL grant of the codeword of the CC that transmits the PHR is used for the calculation of the PUSCH PHR in the CC without the UL grant.
- the UL grant of CC # 0 is used to calculate the PHR of CC # 1 without the UL grant.
- the UL grant of CC # 0 is used to calculate the PHR of CC # 2 having no UL grant.
- the PUSCH of the codeword of the CC having the UL grant calculates the PHR for each CC based on the information. For example, the PHR of CC # 0 and codeword number # 0 is calculated using the UL grant of CC # 0 and codeword number # 0.
- the PUSCH UL grant used for the transmission of the PHR in another CC having the same codeword number as the codeword is used for the calculation of the PUSCH PHR in the codeword of the CC without the UL grant.
- the same UL grant is shared between different CCs (between frequencies).
- the fact that the PHR of a PUSCH with a UL grant can be calculated is that the UL grant of the PUSCH can be received without fail, and by sharing such a UL grant, It is possible to prevent a recognition error in which different UL grants are recognized between the terminal and the base station.
- the terminal can correctly receive one or more UL grants of multiple CCs, that is, if all of the UL grants of multiple CCs have not failed.
- the base station can acquire the PHR from the terminal without delay, similarly to the PUSCH with the UL grant, for the PUSCH without the UL grant. Further, the base station does not have to hold the past UL grant.
- using the parameter information used to calculate the transmission power capacity of the uplink channel that transmits PHR the transmission power or transmission power capacity of other uplink channels to which no uplink allocation signal is transmitted. By calculating for each unit carrier, it is possible to increase the probability that the PHR of a plurality of CCs including the PHR calculated using the reference format can be accurately notified to the base station.
- FIG. 11 shows a case where the PUSCH UL grant used for PHR transmission is shared between different CCs (frequency), but as shown in FIG. 12, the PUSCH UL grant used for PHR transmission is It may be shared between different spatial resources (between codewords and layers).
- the UL grant of the code word having the smallest ⁇ TF value (low MCS) among the plurality of UL grant allocation information is used as the reference format.
- the PHR of 8 is expressed in 64 levels (6 bits) with a resolution of 1 [dB] in the range of -23 to 40 [dB]. If the PHR value is other than the above, it is approximated to an integer PHR closest to the above range.
- MIMO MIMO is used, the transmission power increases, and it is also assumed that the above upper limit value may be exceeded by using the UL grant of the PUSCH of another CC as a reference format. Therefore, by using the UL grant of the code word having the smallest ⁇ TF value (low MCS) among the plurality of UL grant allocation information, it is possible to suppress exceeding the upper limit value of the PHR for each CC, and inaccurate PHR. The probability of notifying can be reduced.
- a codeword (TB, layer) referring to the UL grant may be selected.
- a UL grant of a codeword having a small payload size and payload size / number of resources may be used as a reference format. Further, a UL grant of a code word having a small code block size or a low MCS may be used as a reference format.
- a UL grant of a codeword having a small payload size and a small payload size / number of resources may be used as a reference format.
- a UL grant of a code word with a small number of bits of UCI (CQI, PMI (ACK / NACK, RI)) multiplexed in the code word may be used as a reference format.
- the codeword that refers to the reference format is selected based on ⁇ TF, but the codeword with the smallest bandwidth (M PUSCH ) is also used.
- the code word having the smallest 10 log (M PUSCH ) + ⁇ TF may be selected as the reference destination of the reference format.
- the base station can perform scheduling, link adaptation, or resource allocation based on the PHR that does not cause a recognition gap with the terminal. It can be performed. Further, the base station does not have to hold the past UL grant. Further, similarly to the above, using the parameter information used to calculate the transmission power capacity of the uplink channel that transmits PHR, the transmission power or transmission power capacity of other uplink channels to which no uplink allocation signal is transmitted. By calculating for each unit carrier, it is possible to increase the probability that the PHR of a plurality of CCs including the PHR calculated using the reference format can be accurately notified to the base station.
- the element value of the MIMO precoding vector when the element value of the MIMO precoding vector is added to the transmission power value, the element value having the smallest value among a plurality of codewords (layers) (the absolute value is squared (power Value)) may be shared between multiple antennas and PHR calculated. Thereby, it can suppress exceeding the upper limit of PHR, and the probability of notifying incorrect PHR can be reduced.
- the second embodiment when transmitting PHR across multiple CCs, as in the second embodiment, refer to the UL grant of the PUSCH of the CC having the smallest ⁇ TF, M PUSCH , or 10 log (M PUSCH ) + ⁇ TF. You may select it as a format. Thereby, the same effect as in the second embodiment can be obtained.
- the PHR of the entire terminal is determined according to one of the methods described in the first embodiment or the second embodiment. It may be calculated.
- the subframe is taken as an example of the unit of PHR notification timing.
- the present invention is not limited to this, and may be a unit of TTI, slot, symbol, or the like.
- At least one of the UL grant bandwidth and ⁇ TF is used to calculate the PHR, and the TPC command accumulated value (f (i)) and path loss estimated value (PL) are shared. You don't have to. That is, the UL grant CC (PUSCH) information may be used as it is for the accumulated value of the TPC command and the path loss estimated value.
- the base station can easily detect the path loss change amount and error information of the TPC command in the corresponding CC, and can use the information for scheduling and link adaptation.
- each functional block used in the description of each of the above embodiments is typically realized as an LSI which is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them. Although referred to as LSI here, it may be referred to as IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.
- the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
- An FPGA Field Programmable Gate Array
- a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
- this invention is applicable similarly also with an antenna port (antenna port).
- Antenna port refers to a logical antenna composed of one or more physical antennas. That is, the antenna port does not necessarily indicate one physical antenna, but may indicate an array antenna composed of a plurality of antennas.
- 3GPP LTE it is not specified how many physical antennas an antenna port is composed of, but it is specified as a minimum unit in which a base station can transmit different reference signals (Reference signal).
- the antenna port may be defined as a minimum unit for multiplying the weight of a precoding vector (Precoding vector).
- the radio communication terminal apparatus and radio communication method according to the present invention can be applied to a mobile communication system or the like.
Abstract
Description
タイプ2:Pcmax-PUCCH送信電力-PUSCH送信電力(P_cmax minus PUCCH power minus PUSCH power)
図3は、本発明の実施の形態1に係る無線通信端末装置(以下、単に「端末」という)100の構成を示すブロック図である。以下、図3を参照しながら端末100の構成について説明する。
本発明の実施の形態2では、PHRを送信するCCでMIMO(Multiple Input Multiple Output)送信を行う場合について説明する。ただし、本発明の実施の形態2に係る端末及び基地局の構成は、実施の形態1の図3及び図5に示した構成と同様であり、その一部の機能が異なるのみであるので、異なる機能について図3及び図5を援用して説明する。なお、以下の説明においては、PHRを送信する、上り回線チャネルの送信電力余力の算出に用いたパラメータ情報を用いて、ULグラントが送信されていない他の上り回線チャネルの送信電力又は送信電力余力を計算する場合を前提に述べる。
102、202 無線受信処理部
103 OFDM復調部
104、205-1~205-N 復調部
105、206-1~206-N チャネル復号部
106 抽出部
107、208 PHR制御部
108 TB(CC)選択部
109 PHR算出部
110-1~110-N 多重部
111-1~111-N、213-1、213-2 チャネル符号化部
112-1~112-N、214-1、214-2 変調部
113-1~113-N SC-FDMA変調部
114 合成部
115、216 無線送信処理部
203、207-1~207-N 分離部
204-1~204-N SC-FDMA復調部
209 TB(CC)判断部
210 PHR抽出部
211 スケジューリング部
212 制御情報生成部
215 OFDM変調部
Claims (9)
- 上り回線における単位キャリア毎の送信電力余力を送信する無線通信端末装置であって、
上り回線チャネルの送信電力余力の算出に用いたパラメータ情報を用いて、上り割当信号が送信されていない他の上り回線チャネルの送信電力又は送信電力余力を前記単位キャリア毎に算出する送信電力余力算出手段と、
算出された前記他の上り回線チャネルの前記送信電力又は送信電力余力を送信する送信手段と、
を具備する無線通信端末装置。 - 前記パラメータ情報は、前記送信電力余力を送信する上り回線チャネルの送信電力余力の算出に用いられたパラメータ情報である請求項1に記載の無線通信端末装置。
- 前記パラメータ情報は、物理層における通知パラメータ、上位層における通知パラメータ、自装置において推定した推定値のいずれか1つ以上を含む請求項1に記載の無線通信端末装置。
- 前記物理層における通知パラメータは、アップリンクスケジューリンググラントである請求項3に記載の無線通信端末装置。
- 前記送信電力余力算出手段は、前記上り割当信号が送信されていない他の上り回線チャネルの送信タイミングに対して、過去又は同一の送信タイミングにおける上り回線チャネルの送信電力余力の算出に用いたパラメータ情報を用いる請求項1に記載の無線通信端末装置。
- 前記送信電力余力算出手段は、前記上り割当信号が送信されていない他の上り回線チャネルの使用周波数リソースと異なる使用周波数リソースにおける上り回線チャネルの送信電力余力の算出に用いたパラメータ情報を用いる請求項1に記載の無線通信端末装置。
- 前記送信電力余力算出手段は、前記上り割当信号が送信されていない他の上り回線チャネルの空間リソースと異なる空間リソースにおける上り回線チャネルの送信電力余力の算出に用いたパラメータ情報を用いる請求項1に記載の無線通信端末装置。
- 前記パラメータ情報は、プライマリセルに設定された上り回線チャネルの送信電力余力の算出に用いられた請求項7に記載の無線通信端末装置。
- 上り回線における単位キャリア毎に無線通信端末装置の送信電力余力を送信する無線通信方法であって、
上り回線チャネルの送信電力余力の算出に用いたパラメータ情報を用いて、上り割当信号が送信されていない他の上り回線チャネルの送信電力又は送信電力余力を前記単位キャリア毎に算出し、
算出した前記他の上り回線チャネルの前記送信電力又は送信電力余力を送信する、
無線通信方法。
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JP2012528587A JP5886200B2 (ja) | 2010-08-09 | 2011-07-12 | パワーヘッドルーム算出装置、パワーヘッドルーム算出方法、及び、集積回路 |
US14/699,374 US9554387B2 (en) | 2010-08-09 | 2015-04-29 | Power headroom calculation apparatus and a power headroom calculation method |
US14/702,069 US9386588B2 (en) | 2010-08-09 | 2015-05-01 | Power headroom calculation apparatus and a power headroom calculation method |
US15/372,563 US10349415B2 (en) | 2010-08-09 | 2016-12-08 | Power headroom calculation apparatus and a power headroom calculation method |
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JP2018078631A (ja) * | 2013-05-10 | 2018-05-17 | クアルコム,インコーポレイテッド | 支援情報に基づいて達成可能リンクスループットを推定するための方法および装置 |
WO2018008403A3 (ja) * | 2016-07-05 | 2018-03-01 | シャープ株式会社 | 基地局装置、端末装置および通信方法 |
US11057847B2 (en) | 2016-07-05 | 2021-07-06 | Sharp Kabushiki Kaisha | Base station apparatus, terminal apparatus, and communication method for improving communication performance using multiple frame formats |
CN110381527A (zh) * | 2018-04-04 | 2019-10-25 | 中兴通讯股份有限公司 | 功率余量报告方法、tpc命令发送方法和装置、基站、终端 |
CN110381527B (zh) * | 2018-04-04 | 2022-07-15 | 中兴通讯股份有限公司 | 功率余量报告方法、tpc命令发送方法和装置、基站、终端 |
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CN103053205B (zh) | 2016-08-31 |
CN103053205A (zh) | 2013-04-17 |
CN106230570B (zh) | 2019-11-12 |
US9386588B2 (en) | 2016-07-05 |
JP6807547B2 (ja) | 2021-01-06 |
JP2016106491A (ja) | 2016-06-16 |
US20190254035A1 (en) | 2019-08-15 |
US9554387B2 (en) | 2017-01-24 |
US20170086200A1 (en) | 2017-03-23 |
US20150249992A1 (en) | 2015-09-03 |
US20130128859A1 (en) | 2013-05-23 |
US20150319717A1 (en) | 2015-11-05 |
JP2017011772A (ja) | 2017-01-12 |
JPWO2012020540A1 (ja) | 2013-10-28 |
US10959234B2 (en) | 2021-03-23 |
JP2019004512A (ja) | 2019-01-10 |
JP5886200B2 (ja) | 2016-03-16 |
CN106230570A (zh) | 2016-12-14 |
US10349415B2 (en) | 2019-07-09 |
US9113472B2 (en) | 2015-08-18 |
JP6037297B2 (ja) | 2016-12-07 |
JP6410111B2 (ja) | 2018-10-24 |
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