CN102869080B - Method and device for controlling uplink power - Google Patents
Method and device for controlling uplink power Download PDFInfo
- Publication number
- CN102869080B CN102869080B CN201210001889.6A CN201210001889A CN102869080B CN 102869080 B CN102869080 B CN 102869080B CN 201210001889 A CN201210001889 A CN 201210001889A CN 102869080 B CN102869080 B CN 102869080B
- Authority
- CN
- China
- Prior art keywords
- power
- srs
- uplink channel
- target
- mrow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 117
- 230000005540 biological transmission Effects 0.000 claims abstract description 479
- 239000000969 carrier Substances 0.000 claims abstract description 76
- 230000009467 reduction Effects 0.000 claims description 250
- 238000012545 processing Methods 0.000 claims description 27
- 238000001774 stimulated Raman spectroscopy Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 5
- 230000011664 signaling Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 230000000737 periodic effect Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 1
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method and a device for controlling uplink power to control power of an SRS (sound retrieval system) and an up channel in simultaneous transmission on different carriers. The method for controlling the uplink power includes the steps: determining the target transmitting power needed by sounding reference signal SRS transmission and the target transmitting power needed by up channel transmission; judging whether the sum of the target transmitting power of the SRS and the target transmitting power of the up channel meets preset power control conditions or not; and controlling the target transmitting power of the SRS and the target transmitting power of the up channel when the sum of the target transmitting power of the SRS and the target transmitting power of the up channel meets the preset power control conditions. The SRS and the up channel are in simultaneous transmission on parts of SC-FDMA (single carrier-frequency division multiplexing access) signs of the up channel and on different up carriers.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a power control method and apparatus for uplink transmission.
Background
In Release, Rel-11 of Long Term Evolution-Advanced (LTE-a) technology, different carriers may use different Timing Advances (TA), and therefore uplink transmission times of different carriers may not be aligned, at this Time, Sounding Reference Signals (SRS) and uplink channels may not always collide at the last symbol, and when an SRS and an uplink channel collide at one symbol, if an uplink channel symbol exists on the symbol, the SRS is discarded, thereby causing more SRS to be discarded. Therefore, the LTE-a technology of Rel-11 needs to support the SRS and uplink channel transmission in different carriers at the same time, but no corresponding power control method has been given in the prior art.
PUCCH (Physical Uplink Control Channel) power Control is introduced as follows:
in LTE-A Rel-10, the UE transmits the transmission power P used by PUCCH on the primary carrierPUCCHCalculated by the formula:
wherein:
PCMAX，c(i) is the carrier allowed maximum transmit power configured for carrier c.
PO_PUCCHThe power target value is desired for the PUCCH, configured by higher layer signaling.
PLcThe path loss of the carrier c measured by the UE is measured, and the UE is configured by a higher layer signaling to measure the paired carrier or the primary carrier configured by SIB (system information Block) 2 information.
h(nCQI，nHARQ，nSR) Is the power offset related to the number of bits carried by the PUCCH, where nCQINumber of CSI (Channel State Information) bits for bearer, nHARQNumber of ACK (acknowledgement)/NACK (Non-acknowledgement) bits for bearer, nSRSR for bearer (schedule)An ing Request, scheduling Request) bit number.
Parameter ΔF_PUCCH(F) The power offset corresponding to different PUCCH formats from PUCCH format 1a is indicated by higher layer configuration.
ΔTxD(F') represents the transmit diversity power offset, Δ T if the UE is configured to transmit on a 2-antenna portxD(F') configuring different PUCCH formats by a high-level signaling, and setting the value set as {0, -2} dB; otherwise, Δ TxD(F′)＝0。
g (i) is a power control command accumulated value,whereinPUCCHIs a UE-specific correction value, also called TPC (Transmit Power Control) command,PUCCH(i-km) Denoted as in sub-frame i-kmObtained in (c), for a TDD (Time Division Duplex) system, kmFor the index of the downlink subframe in the downlink subframe set which needs to perform uplink information feedback in the current subframe, M is the number of downlink subframes in the downlink subframe set, and for an FDD (Frequency Division Duplex) system, k ism＝4，M＝1。
The PUSCH (Physical Uplink Shared Channel) power control is introduced as follows:
in LTE-A Rel-10, if the UE does not have PUCCH transmission in subframe i, the UE transmits the transmit power P of the PUSCH on carrier cPUSCH，c(i) Calculated according to the following formula:
wherein:
MPUSCH，c(i) the Resource size of PUSCH on carrier c is denoted by RB (Resource Block).
PO_PUSCH，c(j) Is the PUSCH expected power target value on carrier c, configured by higher layer signaling.
αc(j) Is the path loss compensation factor of the carrier c, is a cell specific parameter, and is configured by a high layer signaling.
PLcThe path loss of the carrier c measured by the UE is measured, and the UE is configured by a higher layer signaling to measure the paired carrier or the primary carrier configured by SIB (system information Block) 2 information.
KSWhen the content is equal to 1.25,at this time,. DELTA.TF，c(i) Indicating that different Modulation and Coding Schemes (MCS) correspond to different power offsets; kSWhen equal to 0, ΔTF，c(i) When it is equal to 0, atTF，c(i) Indicating that the function of power regulation with MCS is turned off, where KSIs a UE specific parameter, indicated by higher layer signaling.
fc(i) There are two ways for the PUSCH power control adjustment amount, an accumulation value and a current absolute value.
In LTE-A Rel-10, if the UE has PUCCH transmission in subframe i, the UE transmits the transmit power P of PUSCH on carrier cPUSCH，c(i) Calculated according to the following formula:
wherein:
is PCMAX，c(i) Linear threshold of, i.e.
Transmitting power P for the PUCCHPUCCH(i) The linear threshold of (2).
SRS power control is introduced as follows:
in LTE-A Rel-10, the UE transmits SRS required transmit power P on carrier cSRSDefined by the following equation:
PSRS，c(i)＝min{PCMAX，c(i)，PSRS_OFFSET，c(m)+10log10(MSRS，c)+PO_PUSCH，c(j)+αc(j)·PLc+fc(i)}[dBm]
wherein:
PSRS_OFFSET，cand (m) is a power offset of the SRS under different antenna port configurations on the carrier c relative to the PUSCH, where m-0 corresponds to a periodic SRS, and m-1 corresponds to an aperiodic SRS.
MSRS，cIs the SRS transmission bandwidth on carrier c, expressed in number of RBs.
The remaining parameters are the same as the power control parameters of the PUSCH on that carrier.
The PRACH (Physical Random Access Channel) power control is introduced as follows
In LTE-a Rel-10, the transmission power of PRACH transmitted on the primary carrier by the UE is calculated by the following formula:
PPRACH＝min{PCMAX，c(i)，PREAMBLE_RECEIVED_TARGET_POWER+PLc}[dBm]
wherein,
PREAMBLE _ RECEIVED _ TARGET _ POWER is calculated by a MAC (Media access control) layer of the UE and is a PRACH TARGET POWER.
The power scaling scheme is introduced as follows:
in LTE-a Rel-10, if the total transmit power of the UE in the current subframe i exceeds the maximum transmit power allowed by the UE, when power reduction is performed, the UE should preferentially ensure the transmit power of the PUCCH, and reduce the PUSCH transmit power on each carrier c in equal proportion to meet the maximum transmit power of the UE:
whereinIs PPUSCH，c(i) W (i) is a power reduction factor on each carrier, 0 ≦ w (i ≦ 1). If there is no PUCCH transmission in the current subframe i, then
If the UE has PUSCH transmission for carrying UCI (Uplink Control Information) and PUSCH transmission without carrying UCI simultaneously in the current subframe i, and the total transmit power of the UE exceeds the maximum allowed transmit power, the UE should preferentially ensure that the transmit power of the PUCCH is not reduced, and then ensure that the transmit power of the PUSCH for carrying UCI is not reduced, and reduce the PUSCH transmit power on each carrier in equal proportion to meet the maximum transmit power of the UE:
when the power of all PUSCHs not carrying UCI is reduced to 0, the total transmission power of the UE still exceeds the maximum allowed transmission power, and the power of the PUSCHs carrying UCI is further reduced. If there is no PUCCH transmission in the current subframe i, then
For the SRS transmitted simultaneously on multiple carriers in the same subframe, if the total transmit power of the UE exceeds the maximum allowed transmit power, performing power reduction on the SRS on each carrier in equal proportion to satisfy the maximum transmit power of the UE:
whereinIs PSRS，c(i) W (i) is the SRS power reduction factor on each carrier c, 0 ≦ w (i ≦ 1).
The following is introduced about CA (Carrier Aggregation) technology:
in view of power limitations, LTE-a Rel-10 does not support simultaneous transmission of PUCCH, PUSCH, PRACH, and SRS on the same or different carriers in one subframe. And if the SRS collides with the PUCCH, when the PUCCH is a short PUCCH format (the PUCCH format is shortened, namely the last symbol is free of mapping data and reserved for the SRS), the SRS transmits in the last symbol in the subframe, otherwise, the SRS transmission is discarded. And if the SRS collides with the PUSCH, when the last symbol of the PUSCH is subjected to rate matching based on the SRS (namely the last symbol is empty of unmapped data and reserved for the SRS), the SRS is transmitted in the last symbol of the subframe, otherwise, the SRS transmission is dropped. Since the uplink in Rel-10 only supports Intra-band (Intra-band) CA (Carrier Aggregation), the uplink transmission times of multiple carriers are aligned, and the base station can avoid dropping SRS transmission by configuring the same SRS transmission period and subframe offset for the multiple carriers.
In LTE-a Rel-11, CA of different uplink frequency bands (inter-band) and CA deployment scheme of mixing Macro base station (Macro eNB) and Remote Radio Head (RRH) can be supported. Due to the fact that the propagation characteristics of wireless signals in different frequency bands are different and propagation paths through which the macro base station and the RRHs pass are different, the time of arrival of signals transmitted by different carriers at the base station is different. Therefore, in Rel-11, the TAs of different carriers may be different, and the uplink transmission times of multiple carriers are not necessarily aligned, so that the SRS on one carrier and the PUCCH or PUSCH on another carrier do not necessarily collide at the last symbol of the PUCCH or PUSCH, and in order to avoid excessive SRS transmission drop, it is necessary to support simultaneous transmission of the SRS on different carriers and uplink channels such as the PUCCH, the PUSCH, and the PRACH, but no explicit power control method is currently provided.
In summary, in the prior art, when the uplink channel where the SRS on different carriers is located and other uplink channels are transmitted simultaneously in the same subframe, no explicit power control method has been provided.
Disclosure of Invention
The embodiment of the invention provides a power control method and a power control system for uplink transmission, which are used for realizing power control when SRS and uplink channels on different carriers are transmitted simultaneously, thereby ensuring that the total transmitting power of UE in a subframe is less than or equal to the maximum transmitting power of the UE and ensuring that the system can work normally.
The power control method for uplink transmission provided by the embodiment of the invention comprises the following steps:
determining a target transmission power required by Sounding Reference Signal (SRS) transmission and a target transmission power required by uplink channel transmission, wherein the SRS and the uplink channel are simultaneously transmitted on a part of single carrier frequency division multiple access (SC-FDMA) symbols of the uplink channel, and the SRS and the uplink channel are transmitted on different uplink carriers;
judging whether the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel meets a preset power control condition;
and when the sum of the target transmitting power is judged to meet a preset power control condition, performing power control on the SRS and the target transmitting power of the uplink channel.
An uplink transmission power control apparatus provided in an embodiment of the present invention includes:
a transmission power determining unit, configured to determine a target transmission power required for sounding reference signal SRS transmission and a target transmission power required for uplink channel transmission, where the SRS and the uplink channel are transmitted simultaneously on a part of single carrier frequency division multiple access SC-FDMA symbols of the uplink channel, and the SRS and the uplink channel are transmitted on different uplink carriers;
a determining unit, configured to determine whether a sum of the SRS and the target transmit power of the uplink channel determined by the transmit power determining unit meets a preset power control condition;
and the processing unit is used for performing power control on the SRS and the target transmitting power of the uplink channel when the judging unit judges that the sum of the target transmitting powers meets a preset power control condition.
In the embodiment of the invention, the target transmitting power required by Sounding Reference Signal (SRS) transmission and the target transmitting power required by uplink channel transmission are determined, wherein the SRS and the uplink channel are simultaneously transmitted on a part of single carrier frequency division multiple access (SC-FDMA) symbols of the uplink channel, and the SRS and the uplink channel are transmitted on different uplink carriers; judging whether the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel meets a preset power control condition; and when the sum of the target transmitting powers is judged to meet a preset power control condition, performing power control on the SRS and the target transmitting power of the uplink channel, thereby realizing power control when the SRS and the uplink channel on different carriers are transmitted simultaneously, ensuring that the total transmitting power of the UE in one subframe is less than or equal to the maximum transmitting power of the UE, and ensuring that the system can work normally.
Drawings
Fig. 1 is a flowchart illustrating a power control method for uplink transmission according to an embodiment of the present invention;
fig. 2 is a schematic diagram of uplink transmission according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of uplink transmission according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of uplink transmission according to a third embodiment of the present invention;
fig. 5 is a schematic diagram of uplink transmission according to a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a power control apparatus for uplink transmission according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a power control method and a power control device for uplink transmission, which are used for realizing power control when SRS and uplink channels on different carriers are transmitted simultaneously, thereby ensuring that the total transmitting power of UE in a subframe is less than or equal to the maximum transmitting power of the UE and ensuring that a system can work normally.
Referring to fig. 1, a method for controlling uplink power provided in an embodiment of the present invention generally includes:
s101, determining target transmitting power required by Sounding Reference Signal (SRS) transmission and target transmitting power required by uplink channel transmission, wherein the SRS and the uplink channel are simultaneously transmitted on a part of single carrier frequency division multiple access (SC-FDMA) symbols of the uplink channel, and the SRS and the uplink channel are transmitted on different uplink carriers;
s102, judging whether the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel meets a preset power control condition;
s103, when the sum of the target transmitting powers is judged to meet a preset power control condition, performing power control on the SRS and the target transmitting power of the uplink channel.
The uplink channel described in the embodiments of the present invention includes, but is not limited to: uplink channels such as PUCCH, PUSCH, and PRACH.
Preferably, the target transmission power required for uplink channel transmission specifically includes:
calculating the original transmitting power of each uplink channel (namely, the power calculated according to a transmitting power calculation formula of PUCCH, PUSCH and PRACH on each carrier in background introduction) based on each carrier and the power control parameters of the uplink channel on the carrier; or,
and calculating the transmission power of the original transmission power of each uplink channel after power control based on each carrier and the power control parameters of the uplink channel on the carrier.
Preferably, when the target transmission power required for the uplink channel transmission is a transmission power obtained by performing power control on the original transmission power of each uplink channel calculated based on each carrier and the power control parameter of the uplink channel on the carrier, the terminal device preferentially needs to perform power control on the original transmission power of the uplink channel, and the power control process specifically includes:
judging whether the sum of original transmitting powers of uplink channels (which can be the uplink channel in the same uplink subframe or the uplink channel in an adjacent uplink subframe) transmitted at the same time exceeds a preset maximum transmitting power or not, if so, performing power control on the uplink channels so that the sum of the transmitting powers of the uplink channels after the power control does not exceed the preset maximum transmitting power, and taking the transmitting power of each uplink channel after the power control as the target transmitting power; when the power does not exceed the target power, the original transmitting power of each uplink channel is taken as the target transmitting power;
the specific method for controlling the power comprises the following steps:
reducing power in equal proportion to all uplink channels; or,
proportionally reducing the power of uplink channels in the same frequency band, and reducing the power of the uplink channels in different frequency bands according to the power reduction proportional coefficient corresponding to the frequency band; or,
proportionally reducing the power of uplink channels with the same priority according to the sequence of the priority of the channels/signals from low to high; or,
and reducing the power of the uplink channels with the same priority and in the same frequency band in an equal proportion according to the sequence of the priority of the channels/signals from low to high, and reducing the power of the uplink channels with the same priority and in different frequency bands according to the power reduction proportion coefficient corresponding to the frequency band.
Preferably, if the target transmission power of the uplink channel is the transmission power after power control, when it is determined that the sum of the target transmission powers meets a preset power control condition, performing power control on the SRS and the target transmission power of the uplink channel, specifically including:
when the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel is larger than the preset maximum transmitting power, carrying out equal proportion power reduction on the target transmitting power of the SRS, or carrying out equal proportion power reduction on the target transmitting power of the SRS positioned in the same frequency band, and carrying out power reduction on the SRS positioned in different frequency bands according to the power reduction proportion coefficient corresponding to the frequency band, so that after the power reduction is met, the sum of the transmitting power of the SRS is smaller than or equal to the preset maximum transmitting power minus the target transmitting power of the uplink channel.
Preferably, when it is determined that the sum of the target transmission powers meets a preset power control condition, performing power control on the SRS and the target transmission power of the uplink channel includes:
and when the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel is greater than the preset maximum transmitting power, carrying out power reduction on the SRS and the target transmitting power of the uplink channel in an equal proportion or non-equal proportion manner so as to meet the condition that the sum of the transmitting power of the SRS and the target transmitting power of the uplink channel is less than or equal to the preset maximum transmitting power after the power reduction.
Preferably, when there are a plurality of simultaneous transmissions of the SRS and the uplink channel in different single carrier frequency division multiple access SC-FDMA symbols of the uplink channel, the method further includes:
respectively judging whether the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel exceeds the preset maximum transmitting power in each SC-FDMA symbol, and performing power control on the SC-FDMA symbols exceeding the preset maximum transmitting power by adopting the following method:
respectively in each SC-FDMA symbol, carrying out power reduction in equal proportion or unequal proportion on the target transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol, or carrying out power reduction in equal proportion or unequal proportion based on channel/signal priority on the target transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol, so that after the power reduction is met, the sum of the transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol is less than or equal to the preset maximum transmission power; or,
firstly, in an SC-FDMA symbol of an uplink channel simultaneously transmitted with an SRS with the highest target transmission power in the plurality of SRSs, performing power reduction with equal proportion or unequal proportion on the target transmission power of the SRS and the uplink channel simultaneously transmitted on the symbol, or performing power reduction with equal proportion or unequal proportion based on channel/signal priority on the target transmission power of the SRS and the uplink channel simultaneously transmitted on the symbol so as to meet the requirement that the sum of the transmission power of the SRS and the uplink channel simultaneously transmitted on the symbol is less than or equal to a preset maximum transmission power after the power reduction, and then in the SC-FDMA symbol of the uplink channel simultaneously transmitted by the rest SRSs and the uplink channel, further judging whether the sum of the target transmission power of the SRS in the symbol and the transmission power of the uplink channel after the power reduction exceeds the preset maximum transmission power or not based on the transmission power of the uplink channel after the power reduction in the symbol And when the maximum transmission power exceeds the preset maximum transmission power, carrying out power reduction on the target transmission power of the SRS in the symbol in an equal proportion or in an unequal proportion so as to ensure that the sum of the transmission powers of the SRS in the symbol does not exceed the difference between the preset maximum transmission power and the transmission power of the uplink channel after the power reduction.
Preferably, when the SRS is transmitted simultaneously with a plurality of SC-FDMA symbols of the uplink channel, the method further includes:
respectively performing power reduction on the SRS and the target transmission power of the uplink channel in the plurality of SC-FDMA symbols in an equal proportion or an unequal proportion, or performing power reduction on the SRS and the target transmission power of the uplink channel in an equal proportion or an unequal proportion based on channel/signal priority, so that after the power reduction is met, the sum of the transmission power of the SRS and the target transmission power of the uplink channel in each SC-FDMA symbol is smaller than or equal to a preset maximum transmission power, and taking the minimum SRS transmission power value after the power reduction as the transmission power of the SRS; or,
and selecting an SC-FDMA symbol with the maximum sum of target transmission power of uplink channels on carriers transmitted on the SC-FDMA symbol from the plurality of SC-FDMA symbols, and performing power reduction on the SRS and the target transmission power of the uplink channel transmitted on the SC-FDMA symbol in an equal proportion or in an unequal proportion, or performing power reduction on the SRS and the target transmission power of the uplink channel transmitted on the SC-FDMA symbol in an equal proportion or in an unequal proportion based on channel/signal priority, so that after the power reduction is met, the sum of the transmission power of the SRS and the uplink channel transmitted on the SC-FDMA symbol is smaller than or equal to the preset maximum transmission power.
Preferably, the power reduction of the target transmission power of the SRS and the target transmission power of the uplink channel in an unequal ratio specifically includes:
and carrying out equal proportional power reduction on the target transmitting power of the SRS and the target transmitting power of the uplink channel in the same frequency band, and carrying out power reduction on the target transmitting power of the SRS and the target transmitting power of the uplink channel in different frequency bands according to power reduction proportional coefficients corresponding to the frequency bands.
Preferably, when it is determined that the sum of the transmission powers satisfies a preset power control condition, performing power control on the SRS and the transmission power of the uplink channel includes:
when the sum of the target transmission powers of the SRS and the uplink channel is greater than the preset maximum transmission power, performing power reduction on the target transmission powers of the SRS and the uplink channel in an equal proportion or non-equal proportion based on the priority of the channel/signal (namely, the uplink channel or the signal or the uplink channel and the signal) so as to meet the condition that the sum of the transmission powers of the SRS and the uplink channel is less than or equal to the preset maximum transmission power after the power reduction.
Preferably, the performing power reduction on the SRS and the target transmission power of the uplink channel in an equal proportion based on the channel/signal priority includes:
and performing power reduction in equal proportion on the target transmission power of the SRS and/or the uplink channel with the same channel/signal priority from low to high according to the sequence of the channel/signal priority.
Preferably, the performing non-proportional power reduction based on channel/signal priority on the SRS and the target transmission power of the uplink channel specifically includes:
and performing power reduction in equal proportion on the SRS in the same frequency band and the SRS with the same channel/signal priority in the uplink channel and/or the target transmission power of the uplink channel according to the power reduction proportion coefficient corresponding to the frequency band, wherein the target transmission power of the SRS in the different frequency bands and the target transmission power of the SRS with the same channel/signal priority in the uplink channel are/is reduced according to the sequence from low to high of the channel/signal priority.
Preferably, when the power of the uplink channel is reduced, the target transmission power of all SC-FDMA symbols in the current subframe of the uplink channel is reduced simultaneously, and when the uplink channel has a plurality of SC-FDMA symbols in the current subframe and SRS are transmitted simultaneously, the minimum value of the transmission power after power reduction in the plurality of SC-FDMA symbols is selected as the transmission power of all SC-FDMA symbols in the current subframe of the uplink channel after power reduction; or,
and only reducing the target transmission power of SC-FDMA symbols which are transmitted simultaneously with the SRS in the current subframe of the uplink channel.
Preferably, the preset maximum transmission power specifically includes: the maximum transmit power allowed by the user equipment, and/or the maximum transmit power allowed by each frequency band corresponding to the user equipment.
In the method for controlling power during simultaneous transmission of SRS and uplink channels on different carriers according to the embodiments of the present invention, when the sum of the transmission powers of SRS and uplink channels is greater than the maximum transmission power in a subframe, power reduction is performed on SRS and uplink channels in an equal proportion or in an unequal proportion, or power reduction is performed in an equal proportion or in an unequal proportion based on channel/signal priority, so as to satisfy that the sum of the transmission powers of the uplink channel where SRS is located after power reduction and a specific uplink channel is less than or equal to the maximum transmission power.
Specifically, the operation of the embodiment of the present invention on the user equipment side includes the following steps:
the method comprises the steps that a user device judges whether the sum of the transmitting power of an SRS and the transmitting power of an uplink channel is larger than the preset maximum transmitting power in an SC-FDMA (Single Carrier-Frequency Division Multiple Access) symbol which is transmitted by the SRS and the uplink channel in a current uplink subframe at the same time, and the uplink channel where the SRS is located and the uplink channel are located in different uplink carriers;
the specific uplink channel includes, but is not limited to, PUCCH, PUSCH, PRACH;
when the sum of the SRS transmitting power and the uplink channel transmitting power is larger than the preset maximum transmitting power, the user device performs power reduction control on the SRS transmitting power and the uplink channel transmitting power on the symbol in an SC-FDAM symbol so as to meet the requirement that the sum of the SRS transmitting power after power reduction and the uplink channel transmitting power on the symbol is smaller than or equal to the maximum transmitting power in the SC-FDMA symbol.
The specific power reduction control methods include the following:
the method comprises the following steps: carrying out equal proportion power reduction on the SRS transmitting power and the uplink channel transmitting power on the symbol so as to meet the condition that the sum of the SRS transmitting power and the uplink channel transmitting power after power reduction is less than or equal to the preset maximum transmitting power in the SC-FDMA symbol;
the second method comprises the following steps: carrying out equal proportion power reduction on the SRS and the transmitting power of an uplink channel on the symbol in the same frequency band; and carrying out power reduction on the SRS and the uplink channel on the symbol according to the power reduction proportion low coefficient corresponding to the frequency band to meet the condition that the sum of the SRS and the uplink channel with reduced power is less than or equal to the maximum transmission power in the SC-FDMA symbol.
The power reduction ratio coefficient corresponding to each frequency band is predetermined by the user equipment and the base station, or is notified by a high layer signaling or a PDCCH (Physical Downlink Control Channel) signaling, where the high layer signaling may be a RRC (Radio Resource Control) signaling or a MAC (Medium Access Control) signaling, or the like.
The third method comprises the following steps: and based on the channel/signal priority, carrying out equal proportion power reduction on the transmission power of the SRS and the uplink channel and/or the uplink signal (mainly referred to as the SRS) with the same channel/signal priority in the uplink channel, so as to ensure that the sum of the transmission power of all the uplink channels and the uplink signal (referred to as the SRS) after power reduction is less than or equal to the maximum transmission power.
The user device reduces the transmitting power of the channels and signals in each channel/signal priority level in turn according to the sequence of the channel/signal priority levels from low to high, reduces the power of a plurality of channels and/or signals with the same channel/signal priority levels in an equal proportion, and till the sum of the transmitting power of all uplink channels and uplink signals (referred to as SRS) meeting the requirement of power reduction is less than or equal to the maximum transmitting power. Namely: preferentially reducing the transmission power of the channel and/or signal with the lowest channel/signal priority, if a plurality of channels and/or signals with the lowest channel/signal priority exist simultaneously, carrying out equal proportion power reduction on the channels and/or signals, when the transmission power of all the channels and/or signals with the lowest channel/signal priority is reduced to 0, the sum of the transmission power of the rest other channels and/or signals with the lowest channel/signal priority is still larger than the maximum transmission power, continuing to reduce the transmission power of the channel and/or signal with the next lower channel/signal priority according to the method, and so on until the sum of the transmission power of all the uplink channels and uplink signals (SRS) meeting the power reduction is smaller than or equal to the maximum transmission power.
The priority of the channels/signals provided by the embodiment of the invention can be pre-configured or agreed as follows:
PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS; or,
PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI SRS; or,
if PRACH exists, then:
PRACH > PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS; or,
PRACH > PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI (SRS); or,
PUCCH > PRACH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS; or,
PUCCH > PRACH > PUSCH carrying UCI > PUSCH not carrying UCI.
It should be noted that the SRS includes a periodic SRS and an aperiodic SRS, where the periodic SRS and the aperiodic SRS have the same priority, or the aperiodic SRS has a higher priority than the periodic SRS.
The method four comprises the following steps: based on the channel/signal priority, carrying out equal proportion power reduction on the transmitting power of the channel and/or the signal with the same channel/signal priority in the SRS and the uplink channel in the same frequency band on the symbol; and performing power reduction on the transmission power of the channel and/or the signal on the symbol, which has the same channel/signal priority, in the SRS and the uplink channel in different frequency bands according to a power reduction proportionality coefficient corresponding to the frequency band, so that the sum of the transmission powers of all the uplink channels and the uplink signals (referred to as SRS) after the power reduction is less than or equal to the preset maximum transmission power.
The user device sequentially reduces the transmitting power of the channels and/or signals in each channel/signal priority level according to the sequence of the channel/signal priority levels from low to high, reduces the power of a plurality of channels and/or signals with the same channel/signal priority level in the same frequency band in an equal proportion, and reduces the power of the channels and/or signals with the same channel/signal priority level in different frequency bands according to the power reduction proportion coefficient corresponding to the frequency band, so that the sum of the transmitting power of all uplink channels and uplink signals (referred to as SRS) after power reduction is smaller than or equal to the maximum transmitting power. Namely: preferentially reducing the transmission power of the channel and/or signal with the lowest channel/signal priority, if a plurality of channels and/or signals with the lowest channel/signal priority exist at the same time, carrying out equal proportion power reduction on the channels and/or signals in the same frequency band, carrying out power reduction on the channels and/or signals in different frequency bands according to the power reduction proportion coefficient of the frequency band, when the transmission power of all the channels and/or signals with the lowest channel/signal priority is reduced to 0, the sum of the transmission power of the rest other priority channels and signals is still greater than the maximum transmission power, continuing to reduce the transmission power of the channels and/or signals with the next lower channel/signal priority according to the method, and the like, until the sum of all uplink channel and uplink signal (SRS) transmission power after the power reduction is met is less than or equal to the maximum transmission power.
Wherein, the channel/signal priority may be pre-configured or agreed as follows:
PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS, or,
PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI SRS;
if PRACH exists, then:
PRACH > PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS, or,
PRACH > PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI-SRS, or,
PUCCH > PRACH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS, or,
PUCCH > PRACH > PUSCH carrying UCI > PUSCH not carrying UCI.
It should be noted that the SRS includes a periodic SRS and an aperiodic SRS, where the periodic SRS and the aperiodic SRS have the same priority, or the aperiodic SRS has a higher priority than the periodic SRS.
The power reduction scaling factor corresponding to each frequency band may be predetermined by the user equipment and the base station, or may be notified through a higher layer signaling or a PDCCH signaling, where the higher layer signaling may be an RRC (Radio Resource Control) signaling or a MAC (Medium access Control) signaling, or the like.
The maximum transmit power may be a maximum transmit power allowed by the UE, and/or a maximum transmit power allowed per frequency band.
Preferably, in the four methods, when multiple SRS and uplink channels in different carriers exist in a subframe at the same time, and different SC-FDMA symbols collide with each other, the UE needs to determine whether the sum of the transmission power of the SRS and the transmission power of the uplink channel on each colliding SC-FDMA symbol is greater than the maximum transmission power, and for the collision symbol greater than the maximum transmission power, the following method is used for power reduction:
the method A comprises the following steps: and the user device respectively reduces the power of the SRS transmission power and the transmission power of the uplink channel on the symbol in different collision symbols according to the method I, the method II, the method III or the method IV.
The method B comprises the following steps: the user equipment selects an SRS with the highest transmission power from the plurality of SRSs, and in a symbol in which the SRS collides with an uplink channel, performing power reduction on the SRS transmission power and the uplink channel transmission power on the symbol according to the above method one, method two, method three or method four, taking the uplink channel transmission power on the symbol after power reduction in the symbol as the transmission power of all symbols after power reduction of the uplink channel, and in the rest symbols of the SRS colliding with the uplink channel, based on the transmitting power of the uplink channel after the power reduction on the symbol, further judging whether the sum of the transmitting power of each uplink channel and the SRS in the symbol is larger than the maximum transmitting power, if so, and carrying out equal-proportion power reduction on the SRS transmitting power in the symbol or carrying out power reduction on the SRS transmitting power based on a power reduction proportion coefficient corresponding to a frequency band.
Preferably, in the method a and the method B, if there is a collision between an SRS symbol and 2 SC-FDMA symbols of uplink channels on other carriers in the current subframe (the 2 SC-FDMA symbols may be 2 symbols of the same uplink channel in the current subframe, or may be the last symbol and the first symbol of an uplink channel in two adjacent subframes, respectively), the UE needs to determine whether the total UE transmit power in the 2 SC-FDMA symbols exceeds the maximum transmit power, if the total transmit power within only 1 SC-FDMA symbol exceeds the maximum transmit power, then, according to the above-mentioned method one, method two, method three or method four, the power of the SRS and the uplink channel on the symbol is reduced, so that the sum of the reduced powers does not exceed the maximum transmit power. If the sum of the SRS transmission power and the uplink channel transmission power on the SC-FDMA symbol in the 2 SC-FDMA symbols is greater than the maximum transmission power, respectively reducing the power of the SRS transmission power and the uplink channel transmission power on the symbol in the 2 SC-FDMA symbols according to the method I, the method II, the method III or the method IV, and taking the minimum SRS transmission power value after the power reduction as the SRS transmission power of the symbol; or, selecting one SC-FDMA symbol with the maximum sum of the transmission power of the uplink channel to be transmitted, and performing power reduction on the transmission power of the SRS and the transmission power of the uplink channel on the symbol according to the method I, the method II, the method III or the method IV on the basis of the transmission power of the uplink channel in the symbol so as to ensure that the sum of the transmission power after power reduction does not exceed the maximum transmission power; or, when the 2 SC-FDAM symbols belong to the same channel on one carrier, the 2 SC-FDAM symbols may be equivalent to one symbol to be processed, that is, only one SC-FDAM symbol is subjected to power reduction on the SRS transmission power and the uplink channel transmission power on the symbol according to the above-mentioned method one, method two, method three, or method four, and the SRS transmission power value after power reduction is used as the SRS transmission power of the SRS symbol, and the uplink channel transmission power after power reduction is used as the uplink channel transmission power on the 2 SC-FDAM symbols.
In the above methods, when the UE performs power reduction on the uplink channel, the transmit power of all SC-FDMA symbols in the subframe is reduced simultaneously, or only the transmit power of SC-FDMA symbols colliding with the SRS in the subframe is reduced.
And when the sum of the transmission power of the SRS and the transmission power of the uplink channel is less than or equal to the preset maximum transmission power, the user device simultaneously transmits the SRS and the uplink channel data in the current uplink subframe. I.e. no power reduction is required.
Preferably, the power reduction scaling factor may be pre-configured based on characteristics of different frequency bands, such as frequency point position, bandwidth, channel state, configured transmission information type, service, and the like.
Preferably, the power reduction proportionality coefficients of different frequency bands may be the same or different; when the power reduction proportionality coefficients of different frequency bands (bands) are the same, the power reduction proportionality coefficients may not be configured;
preferably, the above methods are equally applicable to intra-band and inter-band CA systems.
Preferably, the above methods are equally applicable to FDD and TDD systems.
Several specific examples are given below for a detailed description.
The first embodiment is as follows:
the UE aggregates 5 carriers for uplink transmission, and the transmission condition is as shown in fig. 2, because the TA is different, the uplink transmission time of the carrier (CC)4 and the carrier 5 is advanced by 1 SC-FDMA symbol compared with that of the carriers 1 to 3, therefore, the SRS transmitted by the last symbol on the carriers 4 and 5 collides with the last but one SC-FDMA symbol of the PUCCH or PUSCH on the carriers 1 to 3, and the UE specifically acts as follows:
UE firstly calculates the transmitting power P of PUCCH on carrier 1 according to the related formula of the background technology partPUCCH，1And the transmission power of the PUSCH carrying the UCI on the carrier 2PPUSCH，2And transmitting power P of PUSCH not carrying UCI on carrier 3PUSCH，3The transmission power P of the SRS on carrier 4SRS，4The transmission power P of the SRS on carrier 5SRS，5(ii) a And according to the formulaDetermines its linear domain value, where X represents a certain uplink channel or uplink signal, e.g. for PUCCH,
the UE judges whether the transmitting power of all channels and signals on all carriers is larger than the maximum transmitting power P allowed by the UECMAXWhen determining When the power is required to be reduced, the transmission power of each channel and signal after the power reduction is sent, and the specific method is as follows:
the first method comprises the following steps: proportionally reducing power of all channels and signals, namely sending the channels and the signals according to the transmitting power of the channels and the signals after the power is reduced as shown in the following formula (I), wherein c is a carrier number, and i is a subframe number;
The second method comprises the following steps: performing power reduction on a plurality of SRS with the lowest channel/signal priority in an equal proportion according to the channel/signal priority, and if w (i) which is not 0 exists, keeping original transmission power of PUCCH and PUSCH for transmission and transmitting SRS according to the power after power reduction as shown in the following formula (II); if the sum of the transmission power of the remaining uplink channels is still greater than the maximum transmission power allowed by the UE when the SRS power is reduced to 0, further reducing the power of the PUSCH not carrying the UCI, as shown in the following formula (III), wherein c is the carrier number, i is the number of the subframe, j is the number of the PUSCH carrying the UCI, and so on until the maximum transmission power is met;
When the UE determines that the transmission power of all channels and signals on all carriers is less than or equal to the maximum transmission power P allowed by the UECMAXWhile straightAnd then the data is sent according to the transmitting power calculated by the power control formula on each carrier.
It should be noted that, it is also applicable that the maximum transmission power allowed by the UE in the first embodiment is replaced with the maximum transmission power allowed by the frequency band, that is, when the 5 carriers are in the same frequency band, the power may also be reduced according to the above scheme based on the maximum transmission power allowed by the frequency band, so as to ensure that the sum of the transmission powers of the channels and signals after power reduction is less than or equal to the maximum transmission power allowed by the frequency band; if the UE also operates on carriers in other frequency bands simultaneously, each frequency band may perform power reduction based on the maximum transmission power allowed by the frequency band using the above method.
In addition, when the PUCCH does not exist,when the PUSCH does not exist as described above,the same applies; the same applies when the PUCCH is replaced with the PUSCH or the PRACH or the specific uplink channel, and the same applies when the PUSCH is replaced with the PUCCH or the PRACH or the specific uplink channel.
Example two:
the UE aggregates 4 carriers for uplink transmission, and the transmission situation is as shown in fig. 3, because the TA is different, the uplink transmission time of carrier 3 is 1 SC-FDMA symbol earlier than that of carrier 1, and the uplink transmission time of carrier 4 is 2 SC-FDMA symbols earlier than that of carrier 1, so the symbol where the SRS sent by the last 1 symbol on carrier 3 collides with the PUCCH or PUSCH is the 2 nd from last SC-FDMA symbol on carrier 1 and carrier 2, and the symbol where the SRS sent by the last 1 symbol on carrier 4 collides with the PUCCH or PUSCH is the 3 rd from last SC-FDMA symbol on carrier 1 and carrier 2, and the UE specifically acts as follows:
UE firstly respectively counts according to related formulas of the background technology partCalculating the transmitting power P of PUCCH on the carrier 1PUCCH，1PUSCH on Carrier 2, Transmission Power PPUSCH，2The transmission power P of SRS on carrier 3SRS，3The transmission power P of the SRS on carrier 4SRS，4(ii) a And according toDetermining a linear threshold value of the linear domain;
since the SRS collides with the PUCCH or the PUSCH in 2 SC-FDMA symbols, respectively, the UE needs to determine whether the transmission power of all channels and signals on all carriers on each collision symbol is greater than the maximum transmission power P allowed by the UECMAXWhen the sum of the transmission power of each channel and signal in the 2 SC-FDMA symbols is judged to be larger than the maximum transmission power allowed by the UE, the condition is met And is In time, the following method is adopted for power reduction, and the method specifically comprises the following steps:
the method A comprises the following steps: performing power reduction on each collision symbol with the power larger than the maximum power, wherein the reduction method can be the same as the first method and the second method in the first embodiment;
method A1: in each collision symbol, the power is reduced proportionally for all channels and signals, namely in the 2 nd from last SC-FDMA symbols on the carriers 1 and 2, the formula (one) is equivalent to the following formula (four), and the PUCCH transmitting power after power reduction is obtainedPUSCH transmit powerSRS transmit powerIn the 3 rd last SC-FDMA symbols on the carriers 1 and 2, the formula (one) is equivalent to the following formula (five), and the PUCCH transmitting power after power reduction is obtainedPUSCH transmit powerSRS transmit power
Method A2: in each collision symbol, the SRS with the lowest channel/signal priority is subjected to equal proportional power reduction according to the channel/signal priority, namely in the 2 nd last SC-FDMA symbols on the carriers 1 and 2, the SRS on the carrier 3 is subjected to power reduction according to a formula (II), and because the w (i) value which is not 0 meets the formula, the transmitting power after SRS power reduction is obtainedThe transmission power of the PUCCH remains unchangedThe transmission power of PUSCH remains unchangedIn the 3 rd last SC-FDMA symbols on the carriers 1 and 2, according to the formula (two), when w (i) is 0, that is, when the SRS power on the carrier 4 is reduced to 0, the sum of the transmission powers of the remaining channels is still greater than the maximum transmission power allowed by the UE, the power of the PUSCH is further reduced, and according to the formula (three), the transmission power of the PUSCH after power reduction is obtainedThe transmission power of the PUCCH remains unchangedWork of transmission of SRSRate of change
Further, the transmitting power of the PUCCH after the power reduction is respectively carried out in the two collision symbols is comparedAndtaking a smaller value as the final transmission power of the PUCCH, and sending all SC-FDMA symbols of the PUCCH in the subframe according to the power; comparing the transmission power of the PUSCH after the power reduction is respectively carried out in the two collision symbolsAndtaking a smaller value as the final transmission power of the PUSCH, and sending all SC-FDMA symbols of the PUSCH in the subframe according to the power; according to SRS transmitting power after power reduction in each collision symbolAndsending an SRS;
the method B comprises the following steps: selecting the SRS with the highest transmitting power in a plurality of collision symbols with the power larger than the maximum power, such as the SRS on the carrier 4, and performing power reduction on the symbol where the SRS is located, wherein the reduction method can adopt the first method and the second method in the first embodiment;
method B1: in the collision symbol where the selected SRS is located, the power is reduced in equal proportion to all channels and signals, namely in the last 3 SC-FDMA symbols on the carriers 1 and 2, the formula (one) is equivalent to the formula (five), and the PUCCH transmitting power after the power is reduced is obtainedPUSCH transmit powerSRS transmit power
Method B2: in collision symbols where the selected SRS is located, carrying out equal proportional power reduction on the SRS with the lowest channel/signal priority according to the channel/signal priority, in the 3 rd to last SC-FDMA symbols on the carriers 1 and 2, according to a formula (two), when w (i) is 0, namely the SRS power on the carrier 4 is reduced to 0, the sum of the transmission power of the rest channels is still larger than the maximum transmission power allowed by the UE, further reducing the power of the PUSCH, and according to a formula (three), obtaining the transmission power of the PUSCH after power reductionThe transmission power of the PUCCH remains unchangedTransmission power of SRS
Further, in the other collision symbols, based on the PUCCH and PUSCH transmission powers after the power reduction, whether the total transmission power in the other collision symbols is greater than the maximum transmission power allowed by the UE is further determined, and the SRS in the greater collision symbols is subjected to power reduction in an equal proportion, that is, in the 2 nd last SC-FDMA symbols on carriers 1 and 2, when it is determined that the SRS is in the 2 nd last SC-FDMA symbolThen, according to the formula (II), the transmitting power of the SRS after the power reduction is obtainedFor PUCCH and PUSCH, the transmission power is reduced according to the power respectivelyAndall SC-FDMA symbols of PUCCH and PUSCH in the subframe are sent according to the power, and the power of the SC-FDMA symbols is respectively sent according to SRS transmitting power after the power is reduced in each collision symbolAndsending an SRS; when determiningIn the process, the SRS in the collision symbol does not need to be subjected to power reduction, and is directly sent according to the original SRS transmitting power, and the PUCCH and PUSCH are sent as above;
for the condition of collision symbols with the sum of the transmission power of each channel and the signal less than or equal to the maximum transmission power allowed by the UE, the SRS transmission power is transmitted according to the original calculated power, the transmission power of the channels such as PUCCH and PUSCH is transmitted according to the transmission power after the power is reduced in other collision symbols, and each SC-FDMA symbol is transmitted by using the power;
when the sum of the transmitting power of each channel and signal in each collision symbol is judged to be less than or equal to the maximum transmitting power allowed by the UE, the transmitting power obtained by calculation according to a power control formula on each carrier is directly transmitted;
it should be noted that, in the foregoing embodiment, it is also applicable that the maximum transmit power allowed by the UE is replaced with the maximum transmit power allowed by the frequency band, that is, when the 4 carriers are in the same frequency band, power reduction may also be performed according to the above scheme based on the maximum transmit power allowed by the frequency band, so as to ensure that the sum of the transmit powers of the channels and signals after power reduction is less than or equal to the maximum transmit power allowed by the frequency band; if the UE also works on carriers in other frequency bands simultaneously, each frequency band can respectively carry out power reduction based on the maximum transmitting power allowed by the frequency band by using the method;
in addition, when the PUCCH does not exist,when the PUSCH does not exist as described above,the same applies; the PUCCH is replaced by PUSCH, PRACH, or a specific uplink channel; the PUSCH described above is replaced with PUCCH or PRACH or a specific uplink channel, and the same is applicable.
Example three:
the UE aggregates 5 carriers for uplink transmission, where carrier 1 and carrier 2 are in band 1, carriers 3 to 5 are in band 2, and the transmission condition is as shown in fig. 4, because the TAs are different and the uplink transmission time of carriers 3, 4, and 5 is advanced by 1 SC-FDMA symbol compared with carrier 1, the SRS transmitted by the last symbol on carriers 3 and 5 collides with the PUCCH or the penultimate SC-FDMA symbol on carriers 1, 2, and 4, and the UE specifically acts as follows:
UE firstly respectively calculates the transmitting power P of PUCCH on carrier 1 according to the related formula in the background technologyPUCCH，1，1The transmission power P of SRS on carrier 2SRS，2，1The transmission power P of SRS on carrier 3SRS，3，1PUSCH on Carrier 4, Transmission Power PPUSCH，4，2The transmission power P of the SRS on carrier 5SRS，5，2(ii) a And according toDetermining a linear domain value of the carrier, wherein the 1 st digital subscript represents a carrier number, and the 2 nd digital subscript represents a frequency band number;
when there is no maximum transmit power allowed by the frequency band: the UE judges whether the SRS on all carriers and the transmitting power of the uplink channel are larger than the maximum transmitting power P allowed by the UECMAXWhen the power is judged to be less than or equal to the power control formula on each carrier, the transmitting power obtained by calculation is directly sent according to the power control formula on each carrier; when the judgment result is larger than the preset value, the power is reduced according to the following method:
the first method comprises the following steps: the power reduction is performed by reducing the power of the SRS and the PUCCH or the PUSCH in the same frequency band in an equal proportion, and reducing the power of the SRS and the PUCCH or the PUSCH in different frequency bands by the power reduction proportion factor corresponding to the frequency band, that is, as shown in the following formula (six), the power reduction proportion factor w corresponding to the frequency band 1 is used for the PUCCH and the SRS on the carriers 1, 2, and 3 of the frequency band 11For the PUSCH and SRS on the carriers 4 and 5 of the band 2, the power reduction scale factor w corresponding to the band 2 is used2Equivalence of equation (VI) to <math>
<mrow>
<msub>
<mi>w</mi>
<mn>1</mn>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>·</mo>
<mrow>
<mo>(</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUCCH</mi>
<mo>,</mo>
<mn>1,1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>2,1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>3,1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>w</mi>
<mn>2</mn>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>·</mo>
<mrow>
<mo>(</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUSCH</mi>
<mo>,</mo>
<mn>4,2</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>5,2</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>)</mo>
</mrow>
<mo>≤</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mi>CMAX</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>,</mo>
</mrow>
</math> Reducing the power, and sending according to the transmission power of each channel and signal after the power is reduced;
The second method comprises the following steps: preferentially reducing the transmission power of the SRS with the lowest channel/signal priority according to the channel/signal priority, reducing the power in equal proportion to the SRS in the same frequency band, and performing power reduction on the SRS in different frequency bands by adopting the power reduction proportionality coefficient corresponding to the frequency band 1, as shown in the following formula (seven), namely, using the power reduction proportionality coefficient w corresponding to the frequency band 1 for the SRS on the carriers 2 and 3 of the frequency band 11For the SRS on the carrier 5 of the band 2, the power reduction scaling factor w corresponding to the band 2 is used2Equating the formula (VII) as <math>
<mrow>
<msub>
<mi>w</mi>
<mn>1</mn>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>·</mo>
<mrow>
<mo>(</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>2,1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>3,1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>w</mi>
<mn>2</mn>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>·</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>5,2</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>≤</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mi>CMAX</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>,</mo>
</mrow>
</math> To perform a power reduction if there is a w other than 01And w2The SRS can be sent according to the power after the power is reduced, the power of the PUCCH and the PUSCH does not need to be reduced, and the SRS can be sent according to the original calculated power; if the SRS power is reduced to 0, i.e., w1And w2When the sum of the transmission powers of the remaining channels is 0 and is still greater than the maximum transmission power allowed by the UE, the power of the PUSCH without carrying UCI is further reduced according to the following formula (eight) according to the above principle, where j is the number of the PUSCH carrying UCI, as shown in the above formula (three), and so on until the maximum transmission power is satisfied;
Where b is the band number.
When there is a maximum transmit power allowed for one band per band: the UE needs to ensure that the sum of the transmission power of each channel and signal in each frequency band is less than or equal to the maximum transmission power allowed by the frequency band, and ensure that the total transmission power of each channel and signal in multiple frequency bands is less than or equal to the maximum transmission power allowed by the UE.
The UE firstly judges whether the sum of the transmitting power of all SRS and uplink channels is greater than the maximum transmitting power allowed by the UE, if not, further judges whether the sum of the transmitting power of the SRS and the uplink channels in each frequency band is greater than the maximum transmitting power allowed by the frequency band, if not, the UE sends each channel and signal in the frequency band according to the original calculated power, and if so, the following method is adopted:
the method (I): proportionally reducing the power of the SRS and the uplink channel in the frequency band according to the following formula (nine) to meet the requirement that the maximum transmitting power is less than or equal to the allowable maximum transmitting power of the frequency bandb is a frequency band number; transmitting the post-power to the in-band channel according to the power;
The method (II): proportionally reducing power of the SRS with the lowest channel/signal priority in the frequency band based on the channel/signal priority to meet the maximum transmission power less than or equal to the allowable maximum transmission power of the frequency band according to the following formula (ten)b is a frequency band number; if w (i) which is not 0 exists, transmitting the SRS in the frequency band according to the power of the SRS after power reduction, wherein the power of the PUCCH or PUSCH in the frequency band is unchanged; if w (i) which is not 0 does not exist, further performing equal proportion power reduction on the PUSCHs which do not carry UCI and have the second lowest priority according to the following formula (eleven), wherein j is the number of the PUSCHs carrying UCI, and so on until the maximum transmission power is met;
When the UE judges that the sum of the transmission power of all the SRS and the uplink channel is greater than the maximum transmission power allowed by the UE: the UE performs power reduction on the total transmitting power of each frequency band in equal proportion or on the basis of a power reduction proportion coefficient corresponding to the frequency band so as to meet the condition that the sum of the total transmitting power of each frequency band after power reduction is less than or equal to the maximum transmitting power allowed by the UE; the total transmission power of each frequency band may be the maximum transmission power allowed by the frequency band, or the sum of the initial transmission powers of the SRS and the uplink channel in the frequency band, or for a frequency band in which the sum of the transmission powers of the channel and the signal in the frequency band is greater than the maximum transmission power allowed by the frequency band, and for a frequency band in which the sum of the transmission powers of the channel and the signal in the frequency band is not greater than the maximum transmission power allowed by the frequency band, the sum of the initial transmission powers of the SRS and the uplink channel in the frequency band.
Further, the UE reuses the above method (one) and method (two) to select one of formula (nine) or formula (ten) or formula (eleven) based on the total transmit power of each frequency band after power reductionAnd replacing the total transmission power of each frequency band after power reduction, performing power reduction, and transmitting each channel and signal according to the power after power reduction.
In addition, when the PUCCH is not present,when the PUSCH does not exist as described above,the same applies; the same applies when the PUCCH is replaced by PUSCH or PRACH or a specific uplink channel, and the same applies when the PUSCH is replaced by PUCCH or PRACH or a specific uplink channel.
Example four:
the UE aggregates 4 carriers for uplink transmission, and the transmission situation is as shown in fig. 5, because the TA is different and the uplink transmission time of carriers (CC)3 and 4 lags behind 1 SC-FDMA symbol compared with carriers 1 and 2, the SRS transmitted by the last symbol on carriers 1 and 2 collides with the penultimate SC-FDMA symbol of the PUSCH on carriers 3 and 4, and the UE specifically acts as follows:
UE firstly respectively calculates the transmitting power P of PUCCH and SRS on carrier 1 according to the related formula of the background technology partPUCCH，1And PSRS，1PUSCH (physical uplink shared channel) carrying UCI (uplink control information) on carrier 2 and transmission power P of SRSPUSCH，2And PSRS，2And transmitting power P of PUSCH not carrying UCI on carrier 3PUSCH，3And transmitting power P of PUSCH not carrying UCI on carrier 4PUSCH，4(ii) a And according to the formulaDetermines its linear domain value, where X represents a certain uplink channel or uplink signal, e.g. for PUCCH,
UE firstly judges whether the transmitting power of the uplink channel on all carriers is larger than the maximum transmitting power P allowed by the UECMAXWhen determining <math>
<mrow>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUCCH</mi>
<mo>,</mo>
<mn>1</mn>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUSCH</mi>
<mo>,</mo>
<mn>2</mn>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUSCH</mi>
<mo>,</mo>
<mn>3</mn>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUSCH</mi>
<mo>,</mo>
<mn>4</mn>
</mrow>
</msub>
<mo>≤</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mi>CMAX</mi>
</msub>
</mrow>
</math> In the process, the UE does not need to perform power control on the uplink channels, and performs power control on the SRS based on the original transmission power of each uplink channel, that is:
judging whether the sum of the SRS and the transmitting power of the uplink channel overlapped with the SRS exceeds the maximum transmitting power P allowed by the UECMAXWhen determining <math>
<mrow>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>1</mn>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>2</mn>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUSCH</mi>
<mo>,</mo>
<mn>3</mn>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUSCH</mi>
<mo>,</mo>
<mn>4</mn>
</mrow>
</msub>
<mo>≤</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mi>CMAX</mi>
</msub>
</mrow>
</math> In time, the power does not need to be reduced, and the SRS and the original transmitting power of each uplink channel are transmitted; when determiningIn the meantime, the SRS on the carriers 1 and 2 are subjected to power reduction in equal proportion so that the sum of the SRS transmission powers on the carriers 1 and 2 after power reduction does not exceed the maximum transmission power allowed by the UE minus the transmission power of the uplink channel overlapping with the SRS (i.e. the original transmission power of the PUSCH on the carriers 3 and 4), as shown in the following formula (twelve), where k represents the carrier number where the uplink channel overlapping with the SRS is located, that is, satisfies the requirement of satisfying the requirement <math>
<mrow>
<mi>w</mi>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>·</mo>
<mrow>
<mo>(</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>2</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>)</mo>
</mrow>
<mo>≤</mo>
<mrow>
<mo>(</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mi>CMAX</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>-</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUSCH</mi>
<mo>,</mo>
<mn>3</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>-</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUSCH</mi>
<mo>,</mo>
<mn>4</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>)</mo>
</mrow>
<mo>,</mo>
</mrow>
</math> Obtaining the transmission power P of each SRSSRS，1′＝w(i)·PSRS，1、PSRS，2′＝w(i)·PSRS，2Sending each uplink channel according to the original transmission power, and sending each SRS according to the transmission power after the power is reduced;
When determining In the method, power control needs to be performed on uplink channels to obtain the transmission power of each uplink channel after power control, and the specific method is as follows:
the first method comprises the following steps: proportionally reducing power of all uplink channels, namely sending the uplink channels and the transmission power of signals according to the reduced power as shown in the following formula (thirteen), wherein c is a carrier number, and i is a subframe number; obtaining: pPUCCH，1′＝w(i)·PPUCCH，1、PPUSCH，2′＝w(i)·PPUSCH，2，PPUSCH，3′＝w(i)·PPUSCH，3、PPUSCH，4′＝w(i)·PPUSCH，4；
The second method comprises the following steps: performing equal-proportion power reduction on a plurality of uplink channels (namely, PUSCHs not carrying UCI) with the lowest channel/signal priority according to the channel/signal priority, and keeping the original transmission power of PUCCH and PUSCHs carrying UCI unchanged if w (i) other than 0 exists as shown in the following formula (fourteen), and reducing the transmission power of PUSCHs not carrying UCI on carriers 3 and 4 in equal proportion; if the sum of the transmission power of the remaining uplink channels is still greater than the maximum transmission power allowed by the UE when the power of the PUSCH not carrying the UCI is reduced to 0, further reducing the power of the PUSCH carrying the UCI, as shown in the following formula (fifteen), wherein c is the carrier number, i is the number of the subframe, j is the number of the PUSCH carrying the UCI, and so on until the maximum transmission power is met; obtaining: pPUCCH，1′＝PPUCCH，1、PPUSCH，2′＝PPUSCH，2，PPUSCH，3′＝w(i)·PPUSCH，3、PPUSCH，4′＝w(i)·PPUSCH，4；
Further, the UE performs power control on the SRS based on the transmission power of the uplink channel after the power control, that is: judging whether the sum of the SRS transmitting power and the transmitting power of the uplink channel overlapped with the SRS transmitting power after the power control exceeds the maximum transmitting power P allowed by the UE or notCMAXWhen determiningWhen the power is not required to be reduced, sending the SRS according to the original sending power of the SRS, and sending each uplink channel according to the sending power after the power control; when determiningDuring the power reduction, the SRS on the carriers 1 and 2 are subjected to the power reduction in equal proportion, so that the sum of the SRS transmission powers on the carriers 1 and 2 after the power reduction does not exceed the maximum transmission power allowed by the UE minus the transmission power of the uplink channel overlapped with the SRS after the power control (i.e. the transmission power after the PUSCH power control on the carriers 3 and 4), as shown in the following formula (sixteen), that is, the power reduction satisfies the condition that the sum of the SRS transmission powers on the carriers 1 and 2 after the power reduction does not exceed <math>
<mrow>
<mi>w</mi>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>·</mo>
<mrow>
<mo>(</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>SRS</mi>
<mo>,</mo>
<mn>2</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>)</mo>
</mrow>
<mo>≤</mo>
<mrow>
<mo>(</mo>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mi>CMAX</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>-</mo>
<msup>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUSCH</mi>
<mo>,</mo>
<mn>3</mn>
</mrow>
</msub>
<mo>,</mo>
</msup>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>-</mo>
<msup>
<msub>
<mover>
<mi>P</mi>
<mo>^</mo>
</mover>
<mrow>
<mi>PUSCH</mi>
<mo>,</mo>
<mn>4</mn>
</mrow>
</msub>
<mo>,</mo>
</msup>
<mrow>
<mo>(</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mo>)</mo>
</mrow>
<mo>,</mo>
</mrow>
</math> Obtaining the transmission power P of each SRSSRS，1′＝w(i)·PSRS，1、PSRS，2′＝w(i)·PSRS，2And transmitting each uplink channel according to the transmission power after power control, and transmitting each SRS according to the transmission power after power reduction.
It should be noted that, it is also applicable that the maximum transmission power allowed by the UE in the first embodiment is replaced with the maximum transmission power allowed by the frequency band, that is, when the 4 carriers are in the same frequency band, the power may also be reduced according to the above scheme based on the maximum transmission power allowed by the frequency band, so as to ensure that the sum of the transmission powers of the channels and signals after power reduction is less than or equal to the maximum transmission power allowed by the frequency band; if the UE also operates on carriers in other frequency bands simultaneously, each frequency band may perform power reduction based on the maximum transmission power allowed by the frequency band using the above method.
In addition, when the PUCCH does not exist,when the PUSCH does not exist as described above,the same applies; the same applies when the PUCCH is replaced with the PUSCH or the PRACH or the specific uplink channel, and the same applies when the PUSCH is replaced with the PUCCH or the PRACH or the specific uplink channel.
Referring to fig. 6, an uplink power control apparatus provided in an embodiment of the present invention includes:
a transmission power determining unit 11, configured to determine a target transmission power required for SRS transmission and a target transmission power required for uplink channel transmission, where the SRS and the uplink channel are transmitted simultaneously on a part of single carrier frequency division multiple access SC-FDMA symbols of the uplink channel, and the SRS and the uplink channel are transmitted on different uplink carriers;
a determining unit 12, configured to determine whether a sum of the SRS and the target transmit power of the uplink channel determined by the transmit power determining unit meets a preset power control condition;
a processing unit 13, configured to perform power control on the SRS and the target transmit power of the uplink channel when the determining unit 12 determines that the sum of the target transmit powers meets a preset power control condition.
Preferably, the transmission power determining unit 11 is specifically configured to determine the target transmission power required for the uplink channel transmission according to the following manner:
determining the target transmitting power required by the transmission of the uplink channel as the original transmitting power of each uplink channel calculated on the basis of each carrier and the power control parameter of the uplink channel on the carrier; or,
and determining the target transmitting power required by the transmission of the uplink channel as the transmitting power of the original transmitting power of each uplink channel after power control, which is calculated based on each carrier and the power control parameter of the uplink channel on the carrier.
Preferably, before the transmit power determining unit 11 determines that the target transmit power required for the uplink channel transmission is the transmit power of each uplink channel after power control of the original transmit power of each uplink channel calculated based on each carrier and the power control parameter of the uplink channel on the carrier, the processing unit 13 is further configured to perform power control on the uplink channel, which specifically includes:
judging whether the sum of the original transmitting powers of the uplink channels transmitted simultaneously exceeds a preset maximum transmitting power or not, if so, performing power control on the uplink channels so as to ensure that the sum of the transmitting powers of the uplink channels after power control does not exceed the preset maximum transmitting power, and taking the transmitting power of each uplink channel after power control as the target transmitting power; when the power does not exceed the target power, the original transmitting power of each uplink channel is taken as the target transmitting power;
the power control method comprises the following steps:
reducing power in equal proportion to all uplink channels; or,
proportionally reducing the power of uplink channels in the same frequency band, and reducing the power of the uplink channels in different frequency bands according to the power reduction proportional coefficient corresponding to the frequency band; or,
proportionally reducing the power of uplink channels with the same priority according to the sequence of the priority of the channels/signals from low to high; or,
and reducing the power of the uplink channels with the same priority and in the same frequency band in an equal proportion according to the sequence of the priority of the channels/signals from low to high, and reducing the power of the uplink channels with the same priority and in different frequency bands according to the power reduction proportion coefficient corresponding to the frequency band.
Preferably, if the transmission power determining unit 11 determines that the target transmission power of the uplink channel is the transmission power after power control, when the determining unit 12 determines that the sum of the target transmission powers meets a preset power control condition, the processing unit 13 performs power control on the SRS and the target transmission power of the uplink channel, specifically including:
when the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel is larger than the preset maximum transmitting power, carrying out equal proportion power reduction on the target transmitting power of the SRS, or carrying out equal proportion power reduction on the target transmitting power of the SRS positioned in the same frequency band, and carrying out power reduction on the SRS positioned in different frequency bands according to the power reduction proportion coefficient corresponding to the frequency band, so that after the power reduction is met, the sum of the transmitting power of the SRS is smaller than or equal to the preset maximum transmitting power minus the target transmitting power of the uplink channel.
Preferably, the determining unit 12 is specifically configured to:
and judging whether the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel is greater than the preset maximum transmitting power.
Preferably, the processing unit 13 is specifically configured to:
when the determining unit 12 determines that the sum of the target transmission powers of the SRS and the uplink channel is greater than the preset maximum transmission power, the power of the SRS and the target transmission power of the uplink channel is reduced proportionally or non-proportionally, so that after the power is reduced, the sum of the transmission powers of the SRS and the uplink channel is less than or equal to the preset maximum transmission power.
Preferably, when there are a plurality of simultaneous transmissions of the SRS and the uplink channel in different single carrier frequency division multiple access SC-FDMA symbols of the uplink channel, the determining unit 12 is further configured to:
respectively judging whether the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel exceeds the preset maximum transmitting power in each SC-FDMA symbol;
the processing unit 13 is further configured to perform power reduction on the SC-FDMA symbol determined by the determining unit 12 to exceed the preset maximum transmission power by using the following method:
respectively in each SC-FDMA symbol, carrying out power reduction in equal proportion or unequal proportion on the target transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol, or carrying out power reduction in equal proportion or unequal proportion based on channel/signal priority on the target transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol, so that after the power reduction is met, the sum of the transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol is less than or equal to the preset maximum transmission power; or,
firstly, in the SC-FDMA symbol of the uplink channel transmitted simultaneously with the SRS with the highest target transmission power among the plurality of SRSs, performing power reduction with equal proportion or unequal proportion on the target transmission power of the SRS and the uplink channel transmitted simultaneously on the symbol, or performing power reduction with equal proportion or unequal proportion based on channel/signal priority on the target transmission power of the SRS and the uplink channel transmitted simultaneously on the symbol, so that after the power reduction is met, the sum of the transmission power of the SRS and the uplink channel transmitted simultaneously on the symbol is less than or equal to the preset maximum transmission power, and then in the SC-FDMA symbol of the uplink channel transmitted simultaneously with the rest of the SRS and the uplink channel, based on the transmission power of the uplink channel on the symbol after power reduction, and further judging whether the sum of the target transmitting power of the SRS in the symbol and the transmitting power after the power of the uplink channel is reduced exceeds the preset maximum transmitting power or not, and when the sum exceeds the preset maximum transmitting power, carrying out power reduction on the target transmitting power of the SRS in the symbol in an equal proportion or in a non-equal proportion so as to ensure that the sum of the transmitting power of the SRS in the symbol does not exceed the difference between the preset maximum transmitting power and the transmitting power after the power of the uplink channel is reduced after the power is reduced.
Preferably, when the SRS is transmitted simultaneously with a plurality of SC-FDMA symbols of the uplink channel, the processing unit 13 is further configured to:
respectively performing power reduction on the SRS and the target transmission power of the uplink channel in the plurality of SC-FDMA symbols in an equal proportion or an unequal proportion, or performing power reduction on the SRS and the target transmission power of the uplink channel in an equal proportion or an unequal proportion based on channel/signal priority, so that after the power reduction is met, the sum of the transmission power of the SRS and the target transmission power of the uplink channel in each SC-FDMA symbol is smaller than or equal to a preset maximum transmission power, and taking the minimum SRS transmission power value after the power reduction as the transmission power of the SRS; or,
and selecting an SC-FDMA symbol with the maximum sum of target transmission power of uplink channels on carriers transmitted on the SC-FDMA symbol from the plurality of SC-FDMA symbols, and performing power reduction on the SRS and the target transmission power of the uplink channel transmitted on the SC-FDMA symbol in an equal proportion or in an unequal proportion, or performing power reduction on the SRS and the target transmission power of the uplink channel transmitted on the SC-FDMA symbol in an equal proportion or in an unequal proportion based on channel/signal priority, so that after the power reduction is met, the sum of the transmission power of the SRS and the uplink channel transmitted on the SC-FDMA symbol is smaller than or equal to the preset maximum transmission power.
Preferably, the processing unit 13 performs power reduction on the target transmission powers of the SRS and the uplink channel in the same frequency band in an equal proportion, and performs power reduction on the target transmission powers of the SRS and the uplink channel in different frequency bands according to a power reduction proportion coefficient corresponding to the frequency band in which the target transmission powers are located.
Preferably, the processing unit 13 is specifically configured to:
when the determining unit 12 determines that the sum of the target transmission powers of the SRS and the uplink channel is greater than the preset maximum transmission power, performing power reduction based on channel/signal priority on the SRS and the target transmission power of the uplink channel in an equal proportion or in an unequal proportion, so that after the power reduction is satisfied, the sum of the transmission powers of the SRS and the uplink channel is less than or equal to the preset maximum transmission power.
Preferably, the processing unit 13 is specifically configured to:
and performing power reduction in equal proportion on the target transmission power of the SRS and/or the uplink channel with the same channel/signal priority from low to high according to the sequence of the channel/signal priority.
Preferably, the processing unit 13 is specifically configured to:
and performing power reduction in equal proportion on the SRS in the same frequency band and the SRS with the same channel/signal priority in the uplink channel and/or the target transmission power of the uplink channel according to the power reduction proportion coefficient corresponding to the frequency band, wherein the target transmission power of the SRS in the different frequency bands and the target transmission power of the SRS with the same channel/signal priority in the uplink channel are/is reduced according to the sequence from low to high of the channel/signal priority.
Preferably, the uplink channel/signal priority is specifically:
PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS; or,
PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI SRS; or,
if PRACH exists, then:
PRACH > PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS; or,
PRACH > PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI (SRS); or,
PUCCH > PRACH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS; or,
PUCCH > PRACH > PUSCH carrying UCI > PUSCH not carrying UCI.
Preferably, the processing unit 13 is specifically configured to:
when the power of the uplink channel is reduced, simultaneously reducing the target transmitting power of all SC-FDMA symbols in the current subframe of the uplink channel, and when the uplink channel has a plurality of SC-FDMA symbols in the current subframe and SRS are simultaneously transmitted, selecting the minimum value of the transmitting power after the power of the plurality of SC-FDMA symbols is reduced as the transmitting power of all SC-FDMA symbols in the current subframe of the uplink channel after the power of the uplink channel is reduced; or,
and only reducing the target transmission power of SC-FDMA symbols which are transmitted simultaneously with the SRS in the current subframe of the uplink channel.
Preferably, the preset maximum transmission power specifically includes: the maximum transmit power allowed by the user equipment, and/or the maximum transmit power allowed by each frequency band corresponding to the user equipment.
In summary, in the embodiment of the present invention, for a situation where SRS and uplink channel transmissions on different carriers exist simultaneously in one subframe, when the sum of the transmission powers of the SRS and the uplink channel is greater than the maximum transmission power, the SRS and the uplink channel are subjected to power reduction in an equal proportion/unequal proportion, or power reduction in an equal proportion/unequal proportion based on channel/signal priority is performed, so that the sum of the transmission powers of the SRS and the uplink channel after power reduction is less than or equal to the maximum transmission power, and it is ensured that the system can normally operate.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (25)
1. A method for power control of uplink transmission, the method comprising:
determining a target transmission power required by Sounding Reference Signal (SRS) transmission and a target transmission power required by uplink channel transmission, wherein the SRS and the uplink channel are simultaneously transmitted on a part of single carrier frequency division multiple access (SC-FDMA) symbols of the uplink channel, and the SRS and the uplink channel are transmitted on different uplink carriers;
judging whether the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel meets a preset power control condition;
when the sum of the target transmitting power is judged to meet a preset power control condition, performing power control on the SRS and the target transmitting power of the uplink channel;
when the SRS and a plurality of SC-FDMA symbols of the uplink channel are transmitted simultaneously, respectively performing power reduction on the SRS and the target transmission power of the uplink channel in the plurality of SC-FDMA symbols in an equal proportion or an unequal proportion, or performing power reduction on the SRS and the target transmission power of the uplink channel in an equal proportion or an unequal proportion based on channel/signal priority, so that after the power reduction is met, the sum of the transmission power of the SRS and the target transmission power of the uplink channel in each SC-FDMA symbol is smaller than or equal to a preset maximum transmission power, and the minimum SRS transmission power value after the power reduction is taken as the transmission power of the SRS; or,
when the SRS and a plurality of SC-FDMA symbols of the uplink channel are transmitted simultaneously, selecting an SC-FDMA symbol with the maximum sum of target transmission power of the uplink channel on each carrier transmitted on the SRS and the SC-FDMA symbol from the plurality of SC-FDMA symbols, and performing power reduction with equal proportion or unequal proportion on the SRS and the target transmission power of the uplink channel transmitted on the SC-FDMA symbol, or performing power reduction with equal proportion or unequal proportion based on channel/signal priority on the SRS and the target transmission power of the uplink channel transmitted on the SC-FDMA symbol, so that after the power reduction is met, the sum of the transmission power of the SRS and the transmission power of the uplink channel transmitted on the SC-FDMA symbol is smaller than or equal to the preset maximum transmission power;
when a plurality of SRSs and uplink channels are simultaneously transmitted in different SC-FDMA symbols of the uplink channel, whether the sum of the target transmission power of the SRSs and the target transmission power of the uplink channel exceeds the preset maximum transmission power is judged in each SC-FDMA symbol, and the SC-FDMA symbols exceeding the preset maximum transmission power are subjected to power control by adopting the following method:
respectively in each SC-FDMA symbol, carrying out power reduction in equal proportion or unequal proportion on the target transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol, or carrying out power reduction in equal proportion or unequal proportion based on channel/signal priority on the target transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol, so that after the power reduction is met, the sum of the transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol is less than or equal to the preset maximum transmission power; or,
firstly, in an SC-FDMA symbol of an uplink channel simultaneously transmitted with an SRS with the highest target transmission power in the plurality of SRSs, performing power reduction with equal proportion or unequal proportion on the target transmission power of the SRS and the uplink channel simultaneously transmitted on the symbol, or performing power reduction with equal proportion or unequal proportion based on channel/signal priority on the target transmission power of the SRS and the uplink channel simultaneously transmitted on the symbol so as to meet the requirement that the sum of the transmission power of the SRS and the uplink channel simultaneously transmitted on the symbol is less than or equal to a preset maximum transmission power after the power reduction, and then in the SC-FDMA symbol of the uplink channel simultaneously transmitted by the rest SRSs and the uplink channel, further judging whether the sum of the target transmission power of the SRS in the symbol and the transmission power of the uplink channel after the power reduction exceeds the preset maximum transmission power or not based on the transmission power of the uplink channel after the power reduction in the symbol And when the maximum transmission power exceeds the preset maximum transmission power, carrying out power reduction on the target transmission power of the SRS in the symbol in an equal proportion or in an unequal proportion so as to ensure that the sum of the transmission powers of the SRS in the symbol does not exceed the difference between the preset maximum transmission power and the transmission power of the uplink channel after the power reduction.
2. The method according to claim 1, wherein the target transmit power required for uplink channel transmission specifically includes:
calculating the original transmitting power of each uplink channel based on each carrier and the power control parameters of the uplink channel on the carrier; or,
and calculating the transmission power of the original transmission power of each uplink channel after power control based on each carrier and the power control parameters of the uplink channel on the carrier.
3. The method according to claim 2, wherein when the target transmission power required for the uplink channel transmission is a transmission power obtained by performing power control on an original transmission power of each uplink channel calculated based on each carrier and the power control parameter of the uplink channel on the carrier, the power control process of the uplink channel specifically includes:
judging whether the sum of the original transmitting powers of the uplink channels transmitted simultaneously exceeds a preset maximum transmitting power or not, if so, performing power control on the uplink channels so as to ensure that the sum of the transmitting powers of the uplink channels after power control does not exceed the preset maximum transmitting power, and taking the transmitting power of each uplink channel after power control as the target transmitting power; when the power does not exceed the target power, the original transmitting power of each uplink channel is taken as the target transmitting power;
the power control method comprises the following steps:
reducing power in equal proportion to all uplink channels; or,
proportionally reducing the power of uplink channels in the same frequency band, and reducing the power of the uplink channels in different frequency bands according to the power reduction proportional coefficient corresponding to the frequency band; or,
proportionally reducing the power of uplink channels with the same priority according to the sequence of the priority of the channels/signals from low to high; or,
and reducing the power of the uplink channels with the same priority and in the same frequency band in an equal proportion according to the sequence of the priority of the channels/signals from low to high, and reducing the power of the uplink channels with the same priority and in different frequency bands according to the power reduction proportion coefficient corresponding to the frequency band.
4. The method of claim 2, wherein if the target transmit power of the uplink channel is the transmit power after power control, when it is determined that the sum of the target transmit power meets a preset power control condition, performing power control on the SRS and the target transmit power of the uplink channel, specifically comprising:
when the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel is larger than the preset maximum transmitting power, carrying out equal proportion power reduction on the target transmitting power of the SRS, or carrying out equal proportion power reduction on the target transmitting power of the SRS positioned in the same frequency band, and carrying out power reduction on the SRS positioned in different frequency bands according to the power reduction proportion coefficient corresponding to the frequency band, so that after the power reduction is met, the sum of the transmitting power of the SRS is smaller than or equal to the preset maximum transmitting power minus the target transmitting power of the uplink channel.
5. The method of claim 2, wherein when it is determined that the sum of the target transmission powers satisfies a preset power control condition, performing power control on the SRS and the target transmission power of the uplink channel, includes:
and when the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel is greater than the preset maximum transmitting power, carrying out power reduction on the SRS and the target transmitting power of the uplink channel in an equal proportion or non-equal proportion manner so as to meet the condition that the sum of the transmitting power of the SRS and the target transmitting power of the uplink channel is less than or equal to the preset maximum transmitting power after the power reduction.
6. The method according to any one of claims 1 or 5, wherein performing non-proportional power reduction on the SRS and the target transmit power of the uplink channel specifically includes:
and carrying out equal proportional power reduction on the target transmitting power of the SRS and the target transmitting power of the uplink channel in the same frequency band, and carrying out power reduction on the target transmitting power of the SRS and the target transmitting power of the uplink channel in different frequency bands according to power reduction proportional coefficients corresponding to the frequency bands.
7. The method of claim 2, wherein when it is determined that the sum of the target transmission powers satisfies a preset power control condition, performing power control on the SRS and the target transmission power of the uplink channel, includes:
when the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel is larger than the preset maximum transmitting power, performing power reduction on the SRS and the target transmitting power of the uplink channel in an equal proportion or non-equal proportion based on the channel/signal priority, so that the sum of the transmitting power of the SRS and the target transmitting power of the uplink channel is smaller than or equal to the preset maximum transmitting power after the power reduction is met.
8. The method according to claim 1 or 7, wherein performing an equal proportional power reduction based on channel/signal priority on the target transmission power of the SRS and the uplink channel specifically comprises:
and performing power reduction in equal proportion on the target transmission power of the SRS and/or the uplink channel with the same channel/signal priority from low to high according to the sequence of the channel/signal priority.
9. The method according to claim 1 or 7, wherein performing non-proportional power reduction based on channel/signal priority on the target transmission power of the SRS and the uplink channel specifically comprises:
and performing power reduction in equal proportion on the SRS in the same frequency band and the SRS with the same channel/signal priority in the uplink channel and/or the target transmission power of the uplink channel according to the power reduction proportion coefficient corresponding to the frequency band, wherein the target transmission power of the SRS in the different frequency bands and the target transmission power of the SRS with the same channel/signal priority in the uplink channel are/is reduced according to the sequence from low to high of the channel/signal priority.
10. The method according to claim 1, 3 or 7, wherein the uplink channel/signal priority is specifically:
PUCCH for bearing PUSCH of UCI and PUSCH for not bearing UCI for SRS; or,
PUCCH is used for bearing PUSCH of UCI and PUSCH not used for bearing UCI is SRS; or,
if PRACH exists, then:
PRACH > PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS; or,
PRACH > PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI (SRS); or,
PUCCH > PRACH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS; or,
PUCCH > PRACH > PUSCH carrying UCI > PUSCH not carrying UCI ═ SRS.
11. The method of claim 1, 5 or 7,
when the power of the uplink channel is reduced, simultaneously reducing the target transmitting power of all SC-FDMA symbols in the current subframe of the uplink channel, and when the uplink channel has a plurality of SC-FDMA symbols in the current subframe and SRS are simultaneously transmitted, selecting the minimum value of the transmitting power after the power of the plurality of SC-FDMA symbols is reduced as the transmitting power of all SC-FDMA symbols in the current subframe of the uplink channel after the power of the uplink channel is reduced; or,
and only reducing the target transmission power of SC-FDMA symbols which are transmitted simultaneously with the SRS in the current subframe of the uplink channel.
12. The method according to claim 1, 3, 4, 5 or 7, wherein the preset maximum transmission power specifically comprises: the maximum transmit power allowed by the user equipment, and/or the maximum transmit power allowed by each frequency band corresponding to the user equipment.
13. An apparatus for controlling power of uplink transmission, the apparatus comprising:
a transmission power determining unit, configured to determine a target transmission power required for sounding reference signal SRS transmission and a target transmission power required for uplink channel transmission, where the SRS and the uplink channel are transmitted simultaneously on a part of single carrier frequency division multiple access SC-FDMA symbols of the uplink channel, and the SRS and the uplink channel are transmitted on different uplink carriers;
a determining unit, configured to determine whether a sum of the SRS and the target transmit power of the uplink channel determined by the transmit power determining unit meets a preset power control condition;
the processing unit is used for performing power control on the SRS and the target transmitting power of the uplink channel when the judging unit judges that the sum of the target transmitting powers meets a preset power control condition;
wherein, when the SRS is transmitted simultaneously with a plurality of SC-FDMA symbols of the uplink channel, the processing unit is further configured to:
respectively performing power reduction on the SRS and the target transmission power of the uplink channel in the plurality of SC-FDMA symbols in an equal proportion or an unequal proportion, or performing power reduction on the SRS and the target transmission power of the uplink channel in an equal proportion or an unequal proportion based on channel/signal priority, so that after the power reduction is met, the sum of the transmission power of the SRS and the target transmission power of the uplink channel in each SC-FDMA symbol is smaller than or equal to a preset maximum transmission power, and taking the minimum SRS transmission power value after the power reduction as the transmission power of the SRS; or,
selecting an SC-FDMA symbol with the maximum sum of target transmission power of uplink channels on carriers transmitted on the SC-FDMA symbol from the plurality of SC-FDMA symbols, and performing power reduction on the SRS and the target transmission power of the uplink channel transmitted on the SC-FDMA symbol in an equal proportion or an unequal proportion, or performing power reduction on the SRS and the target transmission power of the uplink channel transmitted on the SC-FDMA symbol in an equal proportion or an unequal proportion based on channel/signal priority, so that after the power reduction is met, the sum of the transmission power of the SRS and the transmission power of the uplink channel transmitted on the SC-FDMA symbol is smaller than or equal to the preset maximum transmission power;
when there are a plurality of simultaneous transmissions of the SRS and the uplink channel in different single carrier frequency division multiple access SC-FDMA symbols of the uplink channel, the determining unit is further configured to:
respectively judging whether the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel exceeds the preset maximum transmitting power in each SC-FDMA symbol;
the processing unit is further configured to perform power reduction on the SC-FDMA symbol determined by the determining unit to exceed the preset maximum transmission power by using the following method:
respectively in each SC-FDMA symbol, carrying out power reduction in equal proportion or unequal proportion on the target transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol, or carrying out power reduction in equal proportion or unequal proportion based on channel/signal priority on the target transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol, so that after the power reduction is met, the sum of the transmission power of the SRS and the uplink channel which are simultaneously transmitted on the symbol is less than or equal to the preset maximum transmission power; or,
firstly, in an SC-FDMA symbol of an uplink channel simultaneously transmitted with an SRS with the highest target transmission power in the plurality of SRSs, performing power reduction with equal proportion or unequal proportion on the target transmission power of the SRS and the uplink channel simultaneously transmitted on the symbol, or performing power reduction with equal proportion or unequal proportion based on channel/signal priority on the target transmission power of the SRS and the uplink channel simultaneously transmitted on the symbol so as to meet the requirement that the sum of the transmission power of the SRS and the uplink channel simultaneously transmitted on the symbol is less than or equal to a preset maximum transmission power after the power reduction, and then in the SC-FDMA symbol of the uplink channel simultaneously transmitted by the rest SRSs and the uplink channel, further judging whether the sum of the target transmission power of the SRS in the symbol and the transmission power of the uplink channel after the power reduction exceeds the preset maximum transmission power or not based on the transmission power of the uplink channel after the power reduction in the symbol And when the maximum transmission power exceeds the preset maximum transmission power, carrying out power reduction on the target transmission power of the SRS in the symbol in an equal proportion or in an unequal proportion so as to ensure that the sum of the transmission powers of the SRS in the symbol does not exceed the difference between the preset maximum transmission power and the transmission power of the uplink channel after the power reduction.
14. The apparatus of claim 13, wherein the transmission power determining unit is specifically configured to determine the target transmission power required for the uplink channel transmission according to the following manners:
determining the target transmitting power required by the transmission of the uplink channel as the original transmitting power of each uplink channel calculated on the basis of each carrier and the power control parameter of the uplink channel on the carrier; or,
and determining the target transmitting power required by the transmission of the uplink channel as the transmitting power of the original transmitting power of each uplink channel after power control, which is calculated based on each carrier and the power control parameter of the uplink channel on the carrier.
15. The apparatus according to claim 14, wherein before the transmit power determining unit determines that the target transmit power required for the uplink channel transmission is the transmit power after power control of the original transmit power of each uplink channel calculated based on each carrier and the power control parameter of the uplink channel on the carrier, the processing unit is further configured to perform power control on the uplink channel, specifically including:
judging whether the sum of the original transmitting powers of the uplink channels transmitted simultaneously exceeds a preset maximum transmitting power or not, if so, performing power control on the uplink channels so as to ensure that the sum of the transmitting powers of the uplink channels after power control does not exceed the preset maximum transmitting power, and taking the transmitting power of each uplink channel after power control as the target transmitting power; when the power does not exceed the target power, the original transmitting power of each uplink channel is taken as the target transmitting power;
the power control method comprises the following steps:
reducing power in equal proportion to all uplink channels; or,
proportionally reducing the power of uplink channels in the same frequency band, and reducing the power of the uplink channels in different frequency bands according to the power reduction proportional coefficient corresponding to the frequency band; or,
proportionally reducing the power of uplink channels with the same priority according to the sequence of the priority of the channels/signals from low to high; or,
and reducing the power of the uplink channels with the same priority and in the same frequency band in an equal proportion according to the sequence of the priority of the channels/signals from low to high, and reducing the power of the uplink channels with the same priority and in different frequency bands according to the power reduction proportion coefficient corresponding to the frequency band.
16. The apparatus according to claim 14, wherein if the transmission power determining unit determines that the target transmission power of the uplink channel is the transmission power after power control, and when the determining unit determines that the sum of the target transmission powers meets a preset power control condition, the processing unit performs power control on the SRS and the target transmission power of the uplink channel, specifically including:
when the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel is larger than the preset maximum transmitting power, carrying out equal proportion power reduction on the target transmitting power of the SRS, or carrying out equal proportion power reduction on the target transmitting power of the SRS positioned in the same frequency band, and carrying out power reduction on the SRS positioned in different frequency bands according to the power reduction proportion coefficient corresponding to the frequency band, so that after the power reduction is met, the sum of the transmitting power of the SRS is smaller than or equal to the preset maximum transmitting power minus the target transmitting power of the uplink channel.
17. The apparatus according to claim 13, wherein the determining unit is specifically configured to:
and judging whether the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel is greater than the preset maximum transmitting power.
18. The apparatus according to claim 14, wherein the processing unit is specifically configured to:
when the judging unit judges that the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel is larger than the preset maximum transmitting power, the power of the SRS and the target transmitting power of the uplink channel is reduced in an equal proportion or in an unequal proportion, so that the sum of the transmitting power of the SRS and the target transmitting power of the uplink channel is smaller than or equal to the preset maximum transmitting power after the power is reduced.
19. The apparatus according to any one of claims 13 or 18, wherein the processing unit performs power reduction on target transmission powers of the SRS and the uplink channel in the same frequency band in an equal proportion, and performs power reduction on target transmission powers of the SRS and the uplink channel in different frequency bands according to a power reduction proportion coefficient corresponding to the frequency band.
20. The apparatus according to claim 14, wherein the processing unit is specifically configured to:
when the judging unit judges that the sum of the target transmitting power of the SRS and the target transmitting power of the uplink channel is larger than the preset maximum transmitting power, the power reduction based on the equal proportion or the unequal proportion of the channel/signal priority is carried out on the target transmitting power of the SRS and the target transmitting power of the uplink channel, so that after the power reduction is met, the sum of the transmitting power of the SRS and the target transmitting power of the uplink channel is smaller than or equal to the preset maximum transmitting power.
21. The apparatus according to claim 13 or 20, wherein the processing unit is specifically configured to:
and performing power reduction in equal proportion on the target transmission power of the SRS and/or the uplink channel with the same channel/signal priority from low to high according to the sequence of the channel/signal priority.
22. The apparatus according to claim 13 or 20, wherein the processing unit is specifically configured to:
and performing power reduction in equal proportion on the SRS in the same frequency band and the SRS with the same channel/signal priority in the uplink channel and/or the target transmission power of the uplink channel according to the power reduction proportion coefficient corresponding to the frequency band, wherein the target transmission power of the SRS in the different frequency bands and the target transmission power of the SRS with the same channel/signal priority in the uplink channel are/is reduced according to the sequence from low to high of the channel/signal priority.
23. The apparatus according to claim 13, 15 or 20, wherein the uplink channel/signal priority is specifically:
PUCCH for bearing PUSCH of UCI and PUSCH for not bearing UCI for SRS; or,
PUCCH is used for bearing PUSCH of UCI and PUSCH not used for bearing UCI is SRS; or,
if PRACH exists, then:
PRACH > PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS; or,
PRACH > PUCCH > PUSCH carrying UCI > PUSCH not carrying UCI (SRS); or,
PUCCH > PRACH > PUSCH carrying UCI > PUSCH not carrying UCI > SRS; or,
PUCCH > PRACH > PUSCH carrying UCI > PUSCH not carrying UCI ═ SRS.
24. The apparatus according to claim 13, 18 or 20, wherein the processing unit is specifically configured to:
when the power of the uplink channel is reduced, simultaneously reducing the target transmitting power of all SC-FDMA symbols in the current subframe of the uplink channel, and when the uplink channel has a plurality of SC-FDMA symbols in the current subframe and SRS are simultaneously transmitted, selecting the minimum value of the transmitting power after the power of the plurality of SC-FDMA symbols is reduced as the transmitting power of all SC-FDMA symbols in the current subframe of the uplink channel after the power of the uplink channel is reduced; or,
and only reducing the target transmission power of SC-FDMA symbols which are transmitted simultaneously with the SRS in the current subframe of the uplink channel.
25. The apparatus according to claim 13, 15, 16, 17, 18 or 20, wherein the preset maximum transmission power specifically comprises: the maximum transmit power allowed by the user equipment, and/or the maximum transmit power allowed by each frequency band corresponding to the user equipment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210001889.6A CN102869080B (en) | 2011-12-22 | 2012-01-05 | Method and device for controlling uplink power |
| PCT/CN2012/086602 WO2013067976A1 (en) | 2011-11-07 | 2012-12-13 | Method and apparatus for controlling uplink transmission power |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110434875 | 2011-12-22 | ||
| CN201110434875.9 | 2011-12-22 | ||
| CN201210001889.6A CN102869080B (en) | 2011-12-22 | 2012-01-05 | Method and device for controlling uplink power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102869080A CN102869080A (en) | 2013-01-09 |
| CN102869080B true CN102869080B (en) | 2015-03-25 |
Family
ID=47447597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210001889.6A Active CN102869080B (en) | 2011-11-07 | 2012-01-05 | Method and device for controlling uplink power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102869080B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103200605B (en) * | 2013-03-01 | 2016-08-10 | 西安电子科技大学 | A kind of ascending power method for reducing based on carrier aggregation system and device |
| CN104812046B (en) | 2014-01-28 | 2019-03-05 | 电信科学技术研究院 | A kind of Poewr control method and device of up channel |
| CN106465289A (en) | 2014-05-08 | 2017-02-22 | 富士通株式会社 | Power control method for uplink channel, user equipment and communication system |
| CN107567085A (en) * | 2016-06-30 | 2018-01-09 | 夏普株式会社 | The method for supporting sTTI base station, user equipment and its execution |
| CN107770853A (en) * | 2016-08-15 | 2018-03-06 | 北京信威通信技术股份有限公司 | A kind of method and device of power compression |
| CN109842473B (en) * | 2017-11-27 | 2021-05-11 | 华为技术有限公司 | Method and equipment for sending signal |
| CN110198560B (en) | 2018-02-26 | 2020-11-13 | 维沃移动通信有限公司 | Power configuration method and terminal |
| CN110945947B (en) * | 2018-05-14 | 2021-09-03 | Oppo广东移动通信有限公司 | Method, device and system for wireless communication |
| CN110881218A (en) * | 2018-09-05 | 2020-03-13 | 维沃移动通信有限公司 | Sounding reference signal transmission method and terminal equipment |
| CN114731257B (en) * | 2020-01-10 | 2024-06-11 | 华为技术有限公司 | Uplink channel demodulation method and uplink channel demodulation device |
| WO2021164007A1 (en) * | 2020-02-21 | 2021-08-26 | Qualcomm Incorporated | Power rebalancing in a maximum permissible exposure event |
-
2012
- 2012-01-05 CN CN201210001889.6A patent/CN102869080B/en active Active
Non-Patent Citations (6)
| Title |
|---|
| 3RD GENERATION PARTNERSHIP PROJECT * |
| CATT.SIMULTANEOUS TRANSMISSION OF MULTIPLE UPLINK CHANNELS IN LTE-A REL-11.《3GPP TSG RAN WG1 MEETING #67》.2011, * |
| NEW POSTCOM.REMAINING DETAILS ON POWER CONTROL FOR SRS TRANSMISSIONS.《3GPP TSG RAN WG1 MEETING #63BIS》.2011, * |
| PHYSICAL LAYER PROCEDURES(RELEASE 10).《3GPP TS 36.213 V10.3.0》.2011, * |
| RESEARCH IN MOTION, UK LIMITED.REMAINING ISSUE ON POWER SCALING FOR CA.《3GPP TSG RAN WG1 MEETING #63》.2010, * |
| TECHNICAL SPECIFICATION GROUP.EVOLVED UNIVERSAL TERRESTRIAL RADIO ACCESS (E-UTRA) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102869080A (en) | 2013-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102869080B (en) | Method and device for controlling uplink power | |
| CN102573030B (en) | Uplink power control method and device | |
| CN102348269B (en) | Method and device of uplink power control | |
| CN103124428B (en) | Method and device for controlling uplink power | |
| CN102378341A (en) | Uplink power control method and device | |
| CN102300305B (en) | Method and device for controlling uplink power | |
| EP3032893B1 (en) | Method and apparatus for controlling uplink power | |
| JP6086549B2 (en) | Power headroom report, resource allocation and power control method | |
| EP2506483B1 (en) | Uplink scheduling support in multi-carrier wireless communication systems | |
| KR101902579B1 (en) | Apparatus and method for uplink power control for a wireless transmitter/receiver unit utilizing multiple carriers | |
| JP5014820B2 (en) | Mobile communication system, user apparatus and communication method | |
| EP3621364B1 (en) | Combined open loop/closed loop for controlling uplink power of a mobile station | |
| CN101969685B (en) | A kind of power setting method of Physical Uplink Control Channel and subscriber equipment | |
| CN104272820A (en) | Terminal, communication method, and integrated circuit | |
| CN102149182A (en) | Method and device for controlling power | |
| CN102752838B (en) | Extension carrier power control method and subscriber equipment | |
| WO2013067976A1 (en) | Method and apparatus for controlling uplink transmission power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210602 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |