CN103826294A

CN103826294A - Power control method and device

Info

Publication number: CN103826294A
Application number: CN201210466126.9A
Authority: CN
Inventors: 高雪娟; 沈祖康
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2012-11-16
Filing date: 2012-11-16
Publication date: 2014-05-28
Anticipated expiration: 2032-11-16
Also published as: CN103826294B

Abstract

The embodiment of the invention discloses a power control method and device and relates to the field of wireless communication. The method and the device are used for solving a problem of how to perform power control when overlapping transmission of a sounding reference signal (SRS) and an uplink channel exits. In the power control method and device, if an uplink channel exists in a current uplink subframe, then a terminal determines a terminal maximum transmission power applied to the uplink channel and/or a carrier maximum transmission power which is corresponding to a carrier in which uplink transmission exists and applied to an uplink channel of the carrier according to an assumed condition that an SRS which is transmitted in an overlapping manner with the uplink channel does not exist; and if SRS transmission exists in the current uplink subframe, the terminal determines the a terminal maximum transmission power which is applied to the SRS and/or a carrier maximum transmission power which is corresponding to each carrier in which SRS transmission exists and applied to an SRS on the carrier according to the real overlapping condition within an SRS transmission time so as to perform power control. Through adoption of the technical scheme, the above-mentioned problem can be solved.

Description

Power control method and apparatus

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a power control method and device.

Background

In Long Term Evolution Advanced (LTE-a) Release10 (Release 10, Rel-10), uplink only supports Intra-band (Intra-band) Carrier Aggregation (CA), and it is considered that radio signal propagation characteristics of each Carrier are approximate, and uplink transmission time is adjusted based on Timing Advance (TA) of Primary Component Carrier (PCC), so that uplink transmission times of multiple carriers are aligned. In Rel-10, a Physical Uplink Control CHannel (PUCCH) and a Physical Uplink Shared CHannel (PUSCH) are supported to transmit simultaneously, and Uplink channels such as a Sounding Reference Signal (SRS) and a PUCCH/PUSCH/Physical Random Access CHannel (PRACH) are not supported to transmit in an overlapping manner, and if the Uplink channels are overlapped, the SRS is discarded; only when the PUCCH adopts a Shortened format (Shortened format) and the PUSCH is reserved based on a last Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol for Rate matching (Rate-matching), there is no transmission on the last SC-FDMA symbol for an uplink channel in the current subframe, and at this time, the SRS and the PUCCH/PUSCH can be simultaneously transmitted in the same subframe, as shown in fig. 1a to 1 c.

In LTE-a release 11 (Rel-11) and subsequent releases, CA of different uplink frequency bands (inter-band) and CA deployment schemes in which a Macro base station (Macro eNB) and a Remote Radio Head (RRH) are mixed can be supported. Considering that the difference between the propagation characteristics of the wireless signal and the propagation path may cause a large difference in uplink transmission delay, different carriers may use different TAs to perform uplink transmission time adjustment (i.e., multiple-TAs (Intra-band) and Inter-band CA may exist), so as to ensure that the time of arrival at the base station of signals transmitted by different carriers in the same uplink subframe is aligned, and avoid mutual interference. Therefore, a concept of a Timing Advance Group (TAG) is introduced, carriers with the same or similar transmission delay are classified into one TAG, and all carriers in the same TAG use the same TA.

Due to the different TAs, the SRS in 1 TAG may overlap with PUCCH/PUSCH in other TAGs over multiple SC-FDMA symbols. When the TA of the TAG where the SRS is located is small, the SRS in the TAG overlaps with the last SC-FDMA symbol of the PUCCH/PUSCH in the same subframe in another TAG and the first SC-FDMA symbol of the PUCCH/PUSCH in the next adjacent subframe, as shown in fig. 2a and fig. 2 c; when the TA of the TAG where the SRS is located is large, the SRS in the TAG overlaps with the last two SC-FDMA symbols of the PUCCH/PUSCH in the same subframe in another TAG, as shown in fig. 2b and fig. 2 d; in the above case, even if the short PUCCH or the rate-matching PUSCH is used on the Component Carrier (CC) 1 (i.e., the PUCCH/PUSCH is guaranteed to have no transmission on the last SC-FDMA symbol), the SRS and PUCCH/PUSCH cannot be prevented from overlapping; for PRACH, since its transmission assumes TA =0, the TA difference between SRS and PRACH is larger, which also results in SRS and PRACH overlapping in multiple symbols, as in fig. 3a and 3 b. If the Rel-10 method is used, the SRS is overlapped with the uplink channel and is discarded without being transmitted, which results in that the base station cannot obtain the uplink channel state of the carrier in time, thereby affecting uplink scheduling.

In Rel-10, in an uplink subframe i, a User Equipment (UE) using CA is defined: target transmit power P for PUCCH transmitted on PCC_PUCCH(i) Target transmitting power P of PRACH transmitted on PCC_PRACH(i) Target transmission power P of PUSCH on each carrier_PUSCH，c(i) And target transmission power P of SRS on each carrier_SRS,c(i) Wherein c is the carrier number, i is the subframe number, and the target transmission power calculation formula of the uplink channel/signal on each carrier can be found in the 3GPP TS 36.213 protocol.

The above-mentioned target transmission power calculation of each carrier is related to the maximum transmission power P of each carrier in addition to the configuration parameters of each uplink channel/signal and carrier_CMAX,c(i) In connection with this, it is ensured that the target transmission power of the uplink channel/signal on each carrier does not exceed P_CMAX,c(i) When the transmission power calculated according to the uplink channel power control related parameter does not exceed P_CMAX,c(i) When the power exceeds the target power, P is selected_CMAX,c(i) As its target transmit power. In addition, when the PUCCH and the PUSCH, or multiple PUSCHs, or multiple SRSs are simultaneously transmitted in the same uplink subframe, it is further required to ensure that the total UE transmit power at any time on all carriers does not exceed the maximum UE transmit power P_CMAX(i) If the sum exceeds the preset value, the uplink channels/signals which are transmitted in the subframe in an overlapped mode need to be subjected to power scaling (power scaling) according to the priority of the channels so as to ensure that the sum of the transmitting power at any time after the power is reduced does not exceed P_CMAX(i)。

In Rel-10, P_CMAX,cCalculating power back-off parameters such as Maximum Power Reduction (MPR), extra Maximum power back-off (A-MPR) and the like determined according to information such as transmission bandwidth, modulation order and the like, wherein the MPR is related to the transmission bandwidth (taking RB as a unit) and a modulation mode, and the A-MPR is related to information such as transmission bandwidth, specific Resource Block (RB) allocation and the like; intra-band CA, P_CMAX,cAnd P_CMAXThe MPR and the A-MPR are the same, the sum of the transmission bandwidths of the uplink channel or the SRS which are transmitted in an overlapping way on each carrier is taken to determine the power backoff parameter, and when Inter-band CA is adopted, each band is assumed to be independent, and for P, the band is independent_CMAX,cThe power back-off parameter is determined by the sum of the transmission bandwidths of the respective uplink channels or SRSs for the carriers in each band (band), for P_CMAXThe power back-off is determined according to the power back-off parameter determined independently for each carrier, if there are multiple modulation modes, such as four-phasePhase-Shift Keying (QPSK), X (X is 16 or 64, etc.) Quadrature Amplitude Modulation (QAM, i.e. 16QAM, 64QAM, etc.), based on the highest order Modulation; therefore, the larger the overlapping transmission bandwidth, the higher the modulation order, the larger the power back-off value, and thus the smaller the actual maximum power value available to the UE.

In summary, there is no specific implementation scheme for performing power control when there is overlapping transmission between SRS and uplink channel.

Disclosure of Invention

The embodiment of the invention provides a power control method and equipment, which are used for solving the problem of how to perform power control when an SRS and an uplink channel have overlapping transmission.

A power control method is applied to a scene that Sounding Reference Signals (SRS) and uplink channels are overlapped on transmission time, and comprises the following steps:

if an uplink channel exists in the current uplink subframe, determining the maximum transmitting power of the terminal applied to the uplink channel and/or the maximum transmitting power of the carrier applied to the uplink channel corresponding to each carrier with uplink channel transmission according to the assumption that the SRS overlapped with the uplink channel transmission does not exist;

if SRS transmission exists in the current uplink subframe, the terminal determines the maximum transmitting power of the terminal applied to the SRS and/or the maximum transmitting power of the carrier applied to the SRS on each carrier corresponding to the carrier with the SRS transmission according to the actual overlapping condition in the SRS transmission time;

and the terminal controls the power of the uplink channel and/or the SRS in the current uplink subframe according to the determined maximum transmission power of the carrier and the determined maximum transmission power of the terminal.

A terminal, the terminal comprising:

a power determining unit, configured to determine, when an uplink channel exists in a current uplink subframe, a maximum transmit power of a terminal applied to the uplink channel and/or a maximum transmit power of a carrier of the uplink channel applied to each carrier corresponding to a carrier having uplink channel transmission according to an assumed condition that there is no SRS that is transmitted in an overlapping manner with the uplink channel; when SRS transmission exists in a current uplink subframe, determining the maximum transmitting power of a terminal applied to the SRS and/or the maximum transmitting power of a carrier applied to the SRS corresponding to each carrier with the SRS transmission according to the actual overlapping condition in the SRS transmission time;

and the power control unit is used for carrying out power control on the uplink channel and/or the SRS in the current uplink subframe according to the determined maximum transmission power of the carrier and the maximum transmission power of the terminal.

In the scheme provided by the embodiment of the invention, the terminal determines the maximum transmitting power of the terminal applied to the uplink channel and/or the maximum transmitting power of the carrier of the uplink channel applied to the carrier corresponding to each carrier with uplink channel transmission according to the assumed condition that no SRS transmission exists in the uplink subframe, determines the maximum transmitting power of the terminal applied to the SRS and/or the maximum transmitting power of the carrier of the SRS applied to the carrier corresponding to each carrier with SRS transmission according to the actual overlapping condition in the SRS transmission time, and then performs power control on the uplink channel and/or the SRS in the uplink subframe according to the determined maximum transmitting power of each carrier and the maximum transmitting power of the terminal. Therefore, in the scheme, when the SRS and the uplink channel are overlapped in transmission time, the terminal respectively determines the maximum transmission power of the uplink channel and the maximum transmission power of the SRS according to different methods, and then performs power control on the transmission of the uplink channel and the SRS according to the determined maximum transmission power, so that the influence of the overlapping of the SRS and the uplink channel on the transmission power of the whole uplink channel is avoided, and the SRS transmission is supported as far as possible under the condition of ensuring the transmission power of the uplink channel, so that the transmission performance is improved.

Drawings

FIG. 1a is a diagram illustrating a transmission situation of an SRS and an uplink channel in Rel-10 in the prior art;

FIG. 1b is a schematic diagram illustrating another transmission situation of SRS and uplink channel in Rel-10 in the prior art;

FIG. 1c is a diagram illustrating another transmission situation of SRS and uplink channel in Rel-10 in the prior art;

FIG. 2a is a diagram illustrating a transmission situation of SRS and PUCCH/PUSCH in Rel-11 in the prior art;

FIG. 2b is a diagram illustrating another transmission situation of SRS and PUCCH/PUSCH in Rel-11 in the prior art;

FIG. 2c is a diagram illustrating another transmission situation of SRS and PUCCH/PUSCH in Rel-11 in the prior art;

FIG. 2d is a diagram illustrating another transmission situation of SRS and PUCCH/PUSCH in Rel-11 in the prior art;

fig. 3a is a schematic diagram of a transmission situation of SRS and PRACH in Rel-11 in the prior art;

FIG. 3b is a diagram illustrating another transmission situation of SRS and PRACH in Rel-11 in the prior art;

FIG. 4 is a schematic flow chart of a method provided by an embodiment of the present invention;

fig. 5a is a schematic diagram of overlapping transmission of SRS and uplink channel in a first embodiment of the present invention;

fig. 5b is a schematic diagram of overlapping transmission of SRS and uplink channel in the second embodiment of the present invention;

fig. 5c is a schematic diagram of overlapping transmission of SRS and uplink channel in a third embodiment of the present invention;

fig. 5d is a schematic diagram of overlapping transmission of SRS and uplink channel in a fourth embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

In Rel-11, for a UE supporting multi-TA transmission, it is more inclined to support overlapping transmission of SRS and uplink channel in different TAGs when the total transmission power of the overlapping part does not exceed the maximum transmission power of the UE (i.e. power is not limited); in addition, in order to improve the utilization rate of uplink resources, when the power of the overlapped part of the SRS and the PUCCH/PUSCH on different carriers in the same TAG is not limited, the overlapped transmission of the SRS and the PUCCH/PUSCH can also be supported, and the last symbol reserved by the PUCCH/PUSCH is avoided for the SRS.

In the multi-TA scenario in Rel-11, when supporting SRS overlapping transmission with the uplink channel without power limitation, if P is as per Rel-10_CMAX,cAnd P_CMAXIn the definition of (1), since the SRS and the PUCCH/PUSCH are overlapped, the transmission bandwidths of the SRS and the PUCCH/PUSCH are considered simultaneously for power backoff of the PUCCH/PUSCH, but actually in fig. 2a and fig. 2b, there is no overlapping transmission between the first 12 SC-FDMA symbols of the PUCCH/PUSCH and the SRS, and power backoff is not required according to the overlapping condition with the SRS, that is, the overlapping of the SRS and a part of symbols of the uplink channel will affect the transmission power of the uplink channel on all SC-FDMA symbols in the whole subframe, which brings unnecessary power reduction, and thus affects transmission performance. In addition, in fig. 2c and 2d, the uplink channel on CC1 overlaps with the uplink channel on CC2 for most of the symbols, and overlaps with SRS for no more than 2 symbols, in which case there is no explicit P at present_CMAX,cAnd P_CMAXAnd (4) a calculation method.

Therefore, in order to solve the problem of how to perform power control when there is overlapping transmission between an SRS and an uplink channel, an embodiment of the present invention provides a power control method.

Referring to fig. 4, the power control method provided in the embodiment of the present invention is applied to a scenario where there is an overlap between an SRS and an uplink channel in transmission time, and includes the following steps:

step 40: if an uplink channel exists in the current uplink subframe (at this time, at least one uplink channel has overlapping transmission with the SRS on part of transmission symbols), the terminal determines the maximum transmitting power of the terminal applied to the uplink channel and/or the maximum transmitting power of the carrier applied to the uplink channel on each carrier corresponding to the carrier with the uplink channel transmission according to the assumption that the SRS overlapping transmission with the uplink channel does not exist; if SRS transmission exists in the current uplink subframe (at the moment, at least one SRS has overlapping transmission with an uplink channel in the transmission time), the terminal determines the maximum transmission power of the terminal applied to the SRS and/or the maximum transmission power of the carrier applied to the SRS on each carrier corresponding to the carrier with the SRS transmission according to the actual overlapping condition in the SRS transmission time;

step 41: and the terminal controls the power of the uplink channel and/or the SRS in the current uplink subframe according to the determined maximum transmission power of the carrier and the determined maximum transmission power of the terminal.

In the above SRS and uplink channel overlapping transmission, the SRS and the uplink channel may be in the same subframe or different subframes, and therefore, steps 40 to 41 include the following three cases:

case 1: an uplink channel and an SRS exist in a current subframe at the same time, and at this time, maximum powers corresponding to the uplink channel and the SRS need to be determined respectively, where the maximum power includes a maximum terminal transmission power and/or a maximum carrier transmission power, and the uplink channel and the SRS are subjected to power control (for example, fig. 2a, 2b, 2c, and 2 d);

case 2: only an uplink channel exists in a current subframe, an SRS overlapped with the uplink channel is transmitted in a subframe before the current subframe, and at this time, the current subframe does not have the SRS, and the maximum power corresponding to the SRS does not need to be determined, and the SRS does not need to be power-controlled, and only the maximum power corresponding to the uplink channel needs to be determined and the power of the uplink channel needs to be power-controlled (for example, in fig. 2a, the current subframe is subframe i +1, and at this time, there is no SRS in the current subframe, only there is the uplink channel, and the SRS overlapped with the uplink channel is in subframe i);

case 3: only the SRS is present in the current subframe, the uplink channel overlapped with the SRS is transmitted in the subframe subsequent to the current subframe, and at this time, there is no uplink channel in the current subframe, and it is not necessary to determine the maximum power corresponding to the uplink channel and perform power control on the uplink channel, but only the maximum power corresponding to the SRS is determined and power control is performed on the SRS (for example, in fig. 2a, it is assumed that the current subframe is subframe i, and the CC1 has no PUCCH/PUSCH transmission in subframe i, and at this time, there is no uplink channel transmission in the current subframe, and only the SRS, and the uplink channel overlapped with the SRS is in subframe i + 1).

It should be noted that, for cases 1 and 3, since it is necessary to use the uplink channel in the next adjacent subframe overlapped with the SRS when determining whether the total terminal transmission power in the SRS transmission time exceeds the maximum transmission power applied to the SRS, the maximum power corresponding to the uplink channel in the next adjacent subframe may also be determined according to the method in step 40.

In step 40, the terminal determines, according to the assumption that there is no SRS overlapping with the uplink channel for transmission, the maximum transmit power of the terminal applied to the uplink channel and/or the maximum transmit power of each carrier applied to the uplink channel corresponding to the carrier where the uplink channel is transmitted, which may be specifically implemented as follows:

determining the maximum transmitting power of the terminal applied to the uplink channel according to the transmission related information of all uplink channels simultaneously transmitted on all carriers in the current subframe (i.e. in general, for all uplink channels in the current subframe, there is a maximum transmitting power value of the terminal, which is determined by comprehensively considering the transmission related information of the uplink channels simultaneously transmitted on all carriers); and/or the presence of a gas in the gas,

determining the maximum transmitting power of the carrier, which is applied to the uplink channel on each carrier and corresponds to the carrier with uplink channel transmission, according to the transmission related information of all uplink channels simultaneously transmitted on all carriers in the current subframe (i.e., for each carrier with uplink channel transmission, the maximum transmitting power is consistent with the maximum transmitting power of the terminal and is determined by comprehensively considering the transmission related information of the uplink channels simultaneously transmitted on all carriers), or determining the maximum transmitting power of the carrier, which is applied to the uplink channel on each carrier with uplink channel transmission, according to the transmission related information of the uplink channel on each carrier with uplink channel transmission respectively (i.e., for each carrier with uplink channel transmission, the maximum transmitting power of the carrier, which is applied to the uplink channel on the carrier, and corresponds to the carrier is determined only according to the transmission related information of the uplink channel on the carrier, without considering transmission-related information of the uplink channel with which transmission overlaps on other carriers).

Specifically, the maximum transmit power of the terminal applied to the uplink channel is determined according to the transmission related information of all uplink channels simultaneously transmitted on all carriers in the current subframe, and the specific implementation may adopt one of the following three ways:

firstly, determining a power back-off value of a terminal according to the total transmission bandwidth, Resource Block (RB) allocation information and the highest-order modulation mode of each uplink channel simultaneously transmitted on all carriers, and determining the maximum terminal transmission power applied to the uplink channels according to the power back-off value of the terminal (namely, comprehensively considering the bandwidth, the RB and the modulation mode of all the uplink channels simultaneously transmitted, determining a terminal power back-off value for determining the maximum terminal transmission power corresponding to the uplink channels);

secondly, respectively determining the power back-off value of each carrier according to the transmission bandwidth, RB allocation information and modulation mode of the uplink channel on each carrier with uplink channel transmission (namely, for each carrier with uplink channel transmission, when only one subframe is supported on the carrier to transmit one uplink channel, determining the power back-off value of the carrier according to the transmission bandwidth, RB allocation information and modulation mode of the uplink channel on the carrier only), determining the maximum transmitting power of the terminal applied to the uplink channel according to the power back-off values of all carriers transmitted by the uplink channel (namely, independently considering the bandwidth, RB and modulation mode of the uplink channel on each carrier to determine the power back-off value of the carrier, and then comprehensively considering the power back-off values of all carriers to determine the power back-off value of one terminal for determining the maximum transmitting power of the terminal corresponding to the uplink channel);

thirdly, determining a power back-off value of each carrier according to the total transmission bandwidth, the RB allocation information and the highest order modulation mode of each uplink channel on each carrier with uplink channel transmission (that is, for each carrier with uplink channel transmission, when the carrier supports simultaneous transmission of a plurality of uplink channels, for example, a PCC can support simultaneous transmission of PUCCH and PUSCH in one subframe, and according to the total transmission bandwidth, the RB allocation information and the highest order modulation mode of each uplink channel simultaneously transmitted on the carrier, determining the power back-off value of the carrier), and determining the maximum transmission power of the terminal applied to the uplink channel according to the power back-off values of all carriers with uplink channel transmission (that is, firstly, considering the bandwidth, RB and modulation mode of all uplink channels simultaneously transmitted on the carrier independently for each carrier, determining the power back-off value of the carrier, and then comprehensively considering the power back-off values of all carriers to determine the power back-off value of one terminal, which is used for determining the maximum transmitting power of the terminal corresponding to the uplink channel).

The above determining, according to the transmission related information of all uplink channels simultaneously transmitted on all carriers in the current subframe, the maximum transmit power of the carrier, which is applied to the uplink channel on each carrier and corresponds to the carrier having uplink channel transmission, or determining, according to the transmission related information of the uplink channel on each carrier having uplink channel transmission, the maximum transmit power of the carrier, which is applied to the uplink channel on the carrier and corresponds to the carrier, may specifically implement the following three ways:

firstly, determining the power back-off value of each carrier with uplink channel transmission according to the total transmission bandwidth, RB allocation information and the highest order modulation mode of all uplink channels simultaneously transmitted on all carriers, respectively determining the maximum transmission power of the carrier, corresponding to each carrier, applied to the uplink channel on the carrier according to the power back-off value of each carrier with uplink channel transmission (namely, for each carrier with uplink channel transmission, the determination method of the power back-off value is the same as the first method of the power back-off value of a terminal, the bandwidth, RB and modulation modes of all uplink channels transmitted simultaneously are comprehensively considered, a power back-off value is determined, the value is applied to each carrier, namely the power back-off value of each carrier is the same, and then the maximum transmission power of the carrier, corresponding to each carrier, applied to the uplink channel on the carrier is respectively determined according to the power back-off value);

secondly, respectively determining the power back-off value of each carrier according to the transmission bandwidth, RB allocation information and modulation mode of the uplink channel on each carrier with uplink channel transmission (namely, for each carrier with uplink channel transmission, when only one subframe is supported on the carrier to transmit one uplink channel, determining the power back-off value of the carrier according to the transmission bandwidth, RB allocation information and modulation mode of the uplink channel on the carrier, without considering the transmission related information of the uplink channel overlapped with the carrier on other carriers), respectively determining the maximum transmitting power of the carrier, which is applied to the uplink channel on each carrier, corresponding to each carrier with uplink channel transmission according to the power back-off value of the carrier with uplink channel transmission (namely, for each carrier with uplink channel transmission, determining the maximum transmitting power of the carrier, which is applied to the uplink channel on each carrier, corresponding to each carrier with uplink channel transmission according to the power back-off value of the carrier);

thirdly, respectively determining a power back-off value of each carrier according to the total transmission bandwidth, the RB allocation information and the highest order modulation mode of each uplink channel on each carrier with uplink channel transmission (that is, for each carrier with uplink channel transmission, when the carrier supports simultaneous transmission of a plurality of uplink channels, for example, PUCCH and PUSCH can be supported on PCC in a subframe, the power back-off value of the carrier is determined according to the total transmission bandwidth, the RB allocation information and the highest order modulation mode of each uplink channel simultaneously transmitted on the carrier, without considering transmission related information of uplink channels overlapped with the uplink channels transmitted on other carriers), and respectively determining the carrier maximum transmission power applied to the uplink channel on the carrier corresponding to the carrier according to the power back-off value of each carrier with uplink channel transmission (that is, for each carrier with uplink channel transmission, determining the carrier maximum transmitting power of the uplink channel applied to the carrier corresponding to the carrier according to the power back-off value of the carrier).

In step 40, the terminal determines, according to the actual overlapping condition in the SRS transmission time, the maximum transmission power of the terminal applied to the SRS and/or the maximum transmission power of the carrier applied to the SRS on each carrier corresponding to the carrier where the SRS transmission exists, and the specific implementation may be as follows:

determining the maximum transmission power of the terminal applied to the SRS according to the transmission related information of all the SRS and uplink channels which are transmitted in an overlapping manner in the SRS transmission time on all the carriers (i.e. in general, for the SRS, there is a maximum transmission power value of the terminal, which is determined by comprehensively considering the transmission related information of all the SRS and uplink channels which are transmitted in an overlapping manner in the SRS transmission time); and/or the presence of a gas in the gas,

determining the maximum transmission power of the carrier, which is applied to the SRS on the carrier, corresponding to each carrier with SRS transmission according to the transmission related information of all the SRS and uplink channels which are transmitted in an SRS transmission time in an overlapping manner on all the carriers (namely, for each carrier with SRS transmission, the transmission related information of all the SRS and uplink channels which are overlapped in the SRS transmission time is determined by comprehensively considering the maximum transmission power of a terminal, which is consistent with the maximum transmission power of the terminal); or, respectively determining the carrier maximum transmission power of the SRS corresponding to each carrier and applied to the carrier according to the transmission related information of the SRS on each carrier with SRS transmission (that is, for each carrier with SRS transmission, determining the carrier maximum transmission power of the SRS corresponding to the carrier and applied to the carrier according to the transmission related information of the SRS on the carrier, without considering the uplink channel and/or the transmission related information of the SRS which are transmitted on other carriers in an overlapping manner); or, respectively determining the carrier maximum transmission power of the SRS corresponding to each carrier with the SRS transmission according to the transmission related information of the SRS and the uplink channel which are transmitted in an overlapping manner within the SRS transmission time on the carrier with the SRS transmission (that is, for each carrier with the SRS transmission, the carrier maximum transmission power of the SRS corresponding to the carrier and applied to the carrier is determined according to the transmission related information of the SRS and the uplink channel which are transmitted in an overlapping manner within the SRS transmission time on the carrier, and the transmission related information of the uplink channel and/or the SRS which are transmitted in an overlapping manner on other carriers does not need to be considered).

Specifically, the maximum transmit power of the terminal applied to the SRS is determined according to the transmission related information of all the SRS and uplink channels that are transmitted in an SRS transmission time on all carriers in an overlapping manner, and the specific implementation may adopt one of the following two ways:

firstly, determining a power back-off value of a terminal according to total transmission bandwidths, RB allocation information and a highest-order modulation mode of all SRS and uplink channels which are transmitted in an SRS transmission time in an overlapping manner on all carriers, and determining the maximum transmission power of the terminal applied to the SRS according to the power back-off value of the terminal (namely, comprehensively considering the bandwidths, RBs and modulation modes of all SRS and uplink channels which are transmitted in the SRS transmission time in an overlapping manner, determining a terminal power back-off value which is used for determining the maximum transmission power of the terminal corresponding to the SRS);

secondly, determining a power backoff value of each carrier according to the transmission bandwidth, RB allocation information and modulation mode of the SRS on each carrier with SRS transmission, or according to the SRS on each carrier with SRS transmission, and the total transmission bandwidth, RB allocation information and the highest order modulation mode of the uplink channel overlapping with the SRS on the carrier, respectively (i.e. for each carrier with SRS transmission, there may be only SRS transmission on the carrier within the SRS transmission time, at this time, the power backoff value of the carrier is determined according to the transmission bandwidth, RB allocation information and modulation mode of the SRS on the carrier, or there may be both SRS and uplink channel such as PUCCH/PUSCH transmission on the carrier within the SRS transmission time, at this time, according to the SRS on the carrier and the total transmission bandwidth, RB allocation information and the highest order modulation mode of the uplink channel overlapping with the SRS on the carrier, determining a power backoff value for the carrier); and determining a power backoff value of each carrier according to the transmission bandwidth, RB allocation information, and modulation scheme of an uplink channel on a carrier on which there is no SRS and an uplink channel overlapping with the SRS in the SRS transmission time, or according to the total transmission bandwidth, RB allocation information, and highest order modulation scheme of each uplink channel on a carrier on which there is no SRS and an uplink channel overlapping with the SRS in the SRS transmission time, respectively (that is, for each carrier on which there is no SRS and an uplink channel overlapping with the SRS in the SRS transmission time, there may be single channel transmission on the carrier, that is, there may be only one channel transmission in one subframe, and at this time, the power backoff value of the carrier is determined according to the transmission bandwidth, RB allocation information, and modulation scheme of the uplink channel on the carrier, or, when there may be simultaneous transmission of multiple uplink channels on the carrier, for example, a PUCCH and a PUSCH may be supported on the PCC to be transmitted simultaneously in one subframe, and at this time, a power backoff value of the carrier is determined according to a total transmission bandwidth, RB allocation information, and a highest-order modulation scheme of each uplink channel on the carrier), and then a terminal maximum transmission power applied to the SRS is determined according to the determined power backoff values of all carriers (that is, a power backoff value of the carrier is determined by independently considering the bandwidth, RB, and modulation scheme of the uplink channel on the carrier for each carrier, and then a power backoff value of one terminal is determined by comprehensively considering the power backoff values of all carriers, so as to determine the terminal maximum transmission power corresponding to the SRS).

The above determining, according to the transmission related information of all SRS and uplink channels that are transmitted in an SRS transmission time in an overlapping manner on all carriers, the maximum transmission power of the carrier that is applied to the SRS on each carrier and corresponds to the carrier having the SRS transmission, or determining, according to the transmission related information of the SRS on each carrier having the SRS transmission, the maximum transmission power of the carrier that is applied to the SRS on the carrier and corresponds to the carrier, or determining, according to the transmission related information of the SRS and uplink channels that are transmitted in an overlapping manner in an SRS transmission time on each carrier having the SRS transmission, the maximum transmission power of the carrier that is applied to the SRS on the carrier and corresponds to the carrier, may specifically implement one of the following three ways:

firstly, determining the power back-off value of each carrier with SRS transmission according to the total transmission bandwidth, RB allocation information and the highest order modulation mode of all SRS and uplink channels which are transmitted in an overlapped mode in the SRS transmission time on all carriers, respectively determining the carrier maximum transmission power of the SRS corresponding to each carrier and applied to the carrier according to the power back-off value of the carrier with SRS transmission (namely, for each carrier with SRS transmission, the determination method of the power back-off value is the same as the first method of the power back-off value of a terminal, and the bandwidth, RB and modulation modes of all uplink channels transmitted simultaneously are comprehensively considered to determine a power back-off value which is suitable for each carrier, namely, the power back-off value of each carrier is the same, and then respectively determining the carrier maximum transmission power of the SRS corresponding to each carrier and applied to the carrier according to the power back-off value);

secondly, respectively determining a power back-off value of each carrier according to the transmission bandwidth, the RB allocation information and the modulation mode of the SRS on each carrier with SRS transmission, and determining the carrier maximum transmission power of the SRS corresponding to the carrier and applied to the carrier according to the power back-off value of the carrier (that is, for each carrier with SRS transmission, when only SRS transmission exists in the SRS transmission time on the carrier, determining the power back-off value of the carrier according to only the transmission bandwidth, the RB allocation information and the modulation mode of the SRS on the carrier, without considering transmission related information of an uplink channel overlapped with the SRS on other carriers, and determining the carrier maximum transmission power of the SRS corresponding to the carrier and applied to the carrier according to the power back-off value of the carrier);

thirdly, determining the power back-off value of each carrier according to the SRS on each carrier with SRS transmission, the total transmission bandwidth of an uplink channel on the carrier and overlapping with the SRS, RB allocation information and the highest order modulation mode, and determining the carrier maximum transmission power of the SRS applied to the carrier corresponding to the carrier according to the power back-off value of the carrier (that is, for each carrier with SRS transmission, when there is SRS and uplink channel such as PUCCH/PUSCH transmission simultaneously in SRS transmission time on the carrier, determining the power back-off value of the carrier according to the total transmission bandwidth, RB allocation information and the highest order modulation mode of the SRS on the carrier and the uplink channel overlapping with the SRS on the carrier, without considering transmission related information of the uplink channel overlapping with the SRS on other carriers, and determining the carrier maximum transmission power of the SRS applied to the carrier corresponding to the carrier according to the power back-off value of the carrier).

The power backoff value at least includes MPR and a-MPR, a method for determining MPR and a-MPR, and a method for determining carrier maximum transmit power and terminal maximum transmit power according to MPR and a-MPR, which may be referred to in 3GPP TS 36.101 protocol.

It should be noted that other Power backoff values, such as Maximum Allowed Power backoff (P-MPR), Allowed side band transmission Power backoff (Δ Tc), etc., are not excluded.

The specific implementation of step 41 may be as follows:

the terminal determines the target transmitting power of the uplink channel according to the maximum transmitting power of the carrier of the uplink channel applied to the carrier corresponding to the carrier where each uplink channel is transmitted; judging whether the sum of the target transmitting power of each uplink channel in the current subframe exceeds the maximum transmitting power of the terminal applied to the uplink channel; determining the actual transmitting power of the actually transmitted uplink channel according to the judgment result; and/or the presence of a gas in the gas,

the terminal determines the target transmitting power of the SRS according to the maximum transmitting power of the SRS applied to the carrier corresponding to the carrier where each SRS is transmitted; judging whether the sum of the target transmitting power of each SRS in the current subframe exceeds the maximum transmitting power of the terminal applied to the SRS and/or judging whether the sum of the target transmitting power of each SRS in the current subframe and the target transmitting power of an uplink channel (the uplink channel can comprise the uplink channel in the current subframe and the uplink channel in a next adjacent subframe of the current subframe) which is transmitted in an overlapping way with the SRS exceeds the maximum transmitting power of the terminal applied to the SRS; and determining the actual transmitting power of the SRS which is actually transmitted according to the judgment result.

Specifically, the actual transmission power of the uplink channel actually transmitted according to the determination result may be as follows:

if the terminal judges that the sum of the target transmitting power of each uplink channel in the current subframe exceeds the maximum transmitting power of the terminal applied to the uplink channel, the terminal adjusts the target transmitting power of at least one uplink channel so that the sum of the target transmitting power of each uplink channel after power adjustment does not exceed the maximum transmitting power of the terminal applied to the uplink channel, and the current target transmitting power of each uplink channel after power adjustment is used as the actual transmitting power of the corresponding uplink channel; if the terminal judges that the sum of the target transmitting power of each uplink channel in the current subframe does not exceed the maximum transmitting power of the terminal applied to the uplink channel, the target transmitting power of each uplink channel is taken as the actual transmitting power of the corresponding uplink channel;

the actual transmission power of the actually transmitted SRS is determined according to the determination result, and the actual transmission power may be specifically implemented as follows:

if the terminal judges that the sum of the target transmitting powers of all the SRSs in the current subframe exceeds the maximum transmitting power of the terminal applied to the SRS and/or judges that the sum of the target transmitting powers of all the SRSs and the target transmitting power of an uplink channel which is transmitted in an overlapped mode with the SRS exceeds the maximum transmitting power of the terminal applied to the SRS, the actual transmitting power of the SRS is determined to be zero (namely the SRS is not transmitted), otherwise, the target transmitting power of all the SRSs is used as the actual transmitting power of the corresponding SRS; or, if it is determined that the sum of the target transmission powers of the SRSs in the current subframe exceeds the maximum transmission power of the terminal applied to the SRS, adjusting the target transmission power of at least one SRS (for example, performing equal power adjustment on the SRSs) so that the sum of the target transmission powers of the SRSs after power adjustment does not exceed the maximum transmission power of the terminal applied to the SRS, and determining whether the sum of the target transmission power of each SRS after power adjustment and the target transmission power of an uplink channel overlapped with the SRS for transmission exceeds the maximum transmission power of the terminal applied to the SRS, if the sum exceeds is determined, determining that the actual transmission power of the SRS is zero, and if the sum does not exceed, taking the target transmission power of each SRS after power adjustment as the actual transmission power of the corresponding SRS.

The method for reducing the target transmission power of at least one uplink channel so that the sum of the target transmission powers of the uplink channels after power adjustment does not exceed the maximum transmission power of the terminal of the uplink channel may be: according to the channel priority: PRACH > PUCCH > PUSCH carrying Uplink Control Information (UCI) > PUSCH not carrying UCI, the target transmitting power of the uplink channel with the lowest priority is preferentially reduced, if a plurality of uplink channels with the same priority exist, the target transmitting power of the uplink channels with the same priority is reduced in an equal proportion until the sum of the target transmitting power of all the uplink channels does not exceed the maximum transmitting power of the terminal of the uplink channel; when the target transmitting power of the uplink channel with the lowest priority is reduced to 0, the sum of the target transmitting powers of the remaining uplink channels still exceeds the maximum transmitting power of the terminal of the uplink channel, and then the target transmitting power of the uplink channel with the next lower priority is further reduced, and the like.

The above method of reducing the target transmission power of at least one SRS so that the sum of the target transmission powers of the SRS after power adjustment does not exceed the maximum transmission power of the terminal applied to the SRS may be: and reducing the power of all the overlapped SRSs in an equal proportion so as to ensure that the sum of the target transmission power of each SRS after power adjustment does not exceed the maximum transmission power of the terminal applied to the SRS.

In the method, the uplink channel may include at least one of a Physical Uplink Control Channel (PUCCH), a Physical Uplink Shared Channel (PUSCH), and a Physical Random Access Channel (PRACH).

The method can be applied to Frequency Division Duplex (FDD) systems and Time Division Duplex (TDD) systems.

The invention is illustrated below in specific examples:

the first embodiment is as follows:

as shown in fig. 5a, in the subframe i, the maximum transmission power of the carrier applied to the uplink channel on the CC1 corresponds to the CC1

Maximum transmission power of carrier corresponding to CC2 and applied to uplink channel on CC2

Need to satisfy P separately_{CMAX_L,c}≤P^H _CMAX,c≤P_{CMAX_H,c}Maximum transmission power of terminal applied to uplink channel

Need to satisfy P_{CMAX_L_CA}≤P^H _CMAX≤P_{CMAX_H_CA}(ii) a CC1 carrier maximum transmit power applied to SRS over CC1

Need to satisfy P_{CMAX_L,c}≤P^S _CMAX,c≤P_{CMAX_H,c}Maximum transmission power of terminal applied to SRSNeed to satisfy P_{CMAX_L_CA}≤P^S _CMAX≤P_{CMAX_H_CA}Wherein:

1) intra-band CA:

for P^H _CMAX,c，

P_{CMAX_L,c}=MIN{P_EMAX,c-ΔT_C,c,P_PowerClass-MAX(MPR_c+A-MPR_c,P-MPR_c)-ΔT_C,c}；

P_{CMAX_H,c}=MIN{P_EMAX,c,P_PowerClass}；

For P^H _CMAX，

P_{CMAX_L_CA}=MIN{10log₁₀∑p_EMAX,c-ΔT_C,P_PowerClass–MAX(MPR+A-MPR,P-MPR)–ΔT_C}；

P_{CMAX_H_CA}=MIN{10log₁₀∑p_EMAX,c,P_PowerClass}；

Wherein, P_EMAXMaximum allowable power, P, configured for network side_PowerClassFor the maximum power allowed per band without considering any back-off, P-MPR is a predefined maximum allowed power back-off value, T_CPower back-off value, Δ T, for sideband transmission_CIs each Delta T_C,cMaximum value of (1), Δ T_C,c=1.5dB or 0, P on each CC^H _CMAX,cMPR of_cSame, A-MPR_cSame, P-MPR_cSame as and satisfying MPR_c=MPR，A-MPR_c=A-MPR，P-MPR_c=P-MPR；

For uplink channels on the CC1 and the CC2, MPR is determined according to the total transmission bandwidth (namely the total RB number) and the highest modulation order (namely one of QPSK, 16QAM and 64QAM, the modulation order is sequentially increased) of PUCCH-1/PUSCH-1 and PUCCH-2/PUSCH-2, and A-MPR is determined according to the total transmission bandwidth of PUCCH-1/PUSCH-1 and PUCCH-2/PUSCH-2 and the RB starting position on each carrier, namely the transmission bandwidth of SRS1 is not considered;

for the SRS1 on the CC1, since the SRS1 overlaps with the uplink channel part in two subframes at the same time, the MPR may be calculated according to the overlapping condition in any one subframe, or calculated separately in different overlapping parts, or calculated according to the maximum overlapping bandwidth and the modulation order, specifically including the following four methods;

the method comprises the following steps: MPR is determined according to the total transmission bandwidth of PUCCH-2/PUSCH-2 and SRS1 and the highest modulation order, A-MPR is determined according to the total transmission bandwidth of PUCCH-2/PUSCH-2 and SRS1 and the RB starting position on each carrier;

the method 2 comprises the following steps: MPR is determined according to the total transmission bandwidth of PUCCH-4/PUSCH-4 and SRS1 and the highest modulation order, A-MPR is determined according to the total transmission bandwidth of PUCCH-3/PUSCH-3 and SRS1 and the RB starting position on each carrier;

the method 3 comprises the following steps: MPR is determined for t1 and t2 periods, respectively, and MPR and A-MPR are determined according to method 1 and method 2, i.e., SRS corresponding to different periods t1 and t2, respectively

A value;

the method 4 comprises the following steps: selecting a channel with a larger transmission bandwidth from PUCCH-2/PUSCH-2 and PUCCH-4/PUSCH-4, wherein the MPR is determined according to the total transmission bandwidth of the selected channel and SRS1 and the highest modulation order between the selected channel and SRS1, and the A-MPR is determined according to the total transmission bandwidth of the selected channel and SRS1 and the RB starting position on each carrier; namely, determining the maximum value of the MPR obtained in the methods 1 and 2 as an actual MPR, and determining the maximum value of the a-MPR obtained in the methods 1 and 2 as an actual a-MPR;

2) inter-band CA:

for P^H _CMAX,c，

P_{CMAX_L,c}=MIN{P_EMAX,c–ΔT_C,c,P_PowerClass–MAX(MPR_c+A-MPR_c+ΔT_IB,c,P-MPR_c)–ΔT_C,c}；

P_{CMAX_H,c}=MIN{P_EMAX,c,P_PowerClass}

For P^H _CMAX，

P_{CMAX_L_CA}=MIN{10log₁₀∑MIN[p_EMAX,c/(ΔT_C,c),p_PowerClass/(MPR_c·A-MPR_c·ΔT_C,c·ΔT_IB,c),p_PowerClass/(P-MPR_c·ΔT_C,c)],P_PowerClass}；

P_{CMAX_H_CA}=MIN{10log₁₀∑p_EMAX,c,P_PowerClass}；

Wherein, Delta T_IB,cIs an extra sideband backoff value;

of an uplink channel

And

the MPR and the additional MPR A-MPR are respectively determined according to the transmission condition on the respective carrier, namely the MPR on the CC1₁Determined according to the transmission bandwidth and modulation order of PUCCH-1/PUSCH-1, A-MPR₁MPR on CC2 determined according to transmission bandwidth of PUCCH-1/PUSCH-1, RB starting position₂Determined according to the transmission bandwidth and the modulation order of PUCCH-2/PUSCH-2, A-MPR on CC2₂The method is determined according to the transmission bandwidth of PUCCH-2/PUSCH-2 and the RB starting position, and does not consider the transmission bandwidth of SRS 1; p corresponding to uplink channel^H _CMAXBased on respective parameters of each CC, e.g. MPR_c、A-MPR_cCalculating according to the formula;

of SRS1

MPR₁Determined according to the transmission bandwidth and modulation order of SRS1, A-MPR₁Determining according to the transmission bandwidth and the RB starting position of the SRS 1; p corresponding to SRS^S _CMAXBased on the corresponding parameters of CC1, e.g. MPR corresponding to SRS1₁、A-MPR₁And corresponding parameters of the CC2 with overlapping transmission with SRS, e.g., MPR in subframe i corresponding to PUCCH-2/PUSCH-2₂、A-MPR₂And/or MPR in subframe i +1 corresponding to PUCCH-4/PUSCH-4₂、A-MPR₂Calculating according to the formula;

example two:

as shown in FIG. 5b, in subframe i, MPR, A-MPR and MPR of the uplink channel

And

and

the determination method of (1) is the same as that of the first embodiment; for SRS2 on CC2, at intra-band CA, it

Corresponding to SRS

The MPR is determined according to the total transmission bandwidth of PUCCH-1/PUSCH-1 and SRS2 and the highest modulation order, the A-MPR is determined according to the total transmission bandwidth of PUCCH-1/PUSCH-1 and SRS2 and the RB starting position on each carrier, and the rest of calculation steps and methods are the same as those of the first embodiment; at inter-band CA, itThe corresponding MPR2 is determined according to the transmission bandwidth and the modulation order of the SRS2, A-MPR₂According to the transmission bandwidth and RB starting position of the SRS2, the P corresponding to the SRS^S _CMAXBased on the corresponding parameters of CC2, e.g. MPR corresponding to SRS1₁、A-MPR₁And corresponding parameters of CC1 with overlapping transmission with SRS, e.g., MPR corresponding to PUCCH-1/PUSCH-1₁、A-MPR₁Calculated according to the corresponding formula in the first embodiment.

Example three:

as shown in fig. 5c, in subframe i, for the uplink channel on CC1

And an uplink channel pairShould be that

During Intra-band and inter-band CA, the MPR is determined only according to the transmission bandwidth and the modulation order of PUCCH-1/PUSCH-1, the A-MPR is determined according to the transmission bandwidth and the RB initial position of PUCCH-1/PUSCH-1, the information of SRS transmission bandwidth, RB allocation, modulation order and the like does not need to be considered, and the rest of calculation steps and methods are the same as the first embodiment; of SRS2 in subframe i

And corresponding to SRS

The determination method of (2) is the same as that of the second embodiment.

Example four:

as shown in fig. 5d, when the current subframe is subframe i, there is no uplink channel in subframe i, and only SRS1 transmission on CC1 exists, so that it is only necessary to determine the maximum transmission power of the carrier and the maximum transmission power of the terminal for SRS; in intra-band CA, SRS1

Corresponding to SRS

The MPR is determined according to the total transmission bandwidth of PUCCH-4/PUSCH-4 and SRS1 and the highest modulation order, the A-MPR is determined according to the total transmission bandwidth of PUCCH-4/PUSCH-4 and SRS1 and the RB starting position on each carrier, and the rest of calculation steps and methods are the same as those of the first embodiment; of SRS1 at inter-band CA

Corresponding MPR₁Determined according to the transmission bandwidth and modulation order of SRS1, A-MPR₁According to the transmission bandwidth and RB starting position of the SRS1, the P corresponding to the SRS^S _CMAXBased on the corresponding parameters of CC1, e.g. MPR corresponding to SRS1₁、A-MPR₁And overlapping with the SRS1Corresponding parameters of the input CC2 in subframe i +1, e.g. MPR corresponding to PUCCH-4/PUSCH-4₄、A-MPR₄Calculating according to a corresponding formula in the first embodiment;

when the current subframe is a subframe i +1, no SRS exists in the subframe i +1, and only uplink channel transmission on CC1 and CC2 exists, so that the maximum transmission power of the carrier and the maximum transmission power of the terminal only need to be determined for the uplink channel; in intra-band CA, for the uplink channels on CC1 and CC2,

andthe MPRs are determined according to the total transmission bandwidth and the highest modulation order of PUCCH-3/PUSCH-3 and PUCCH-4/PUSCH-4, the A-MPRs are determined according to the total transmission bandwidth of PUCCH-3/PUSCH-3 and PUCCH-4/PUSCH-4 and the RB starting position on each carrier, namely the transmission bandwidth of SRS1 is not considered, and the specific calculation formula is shown in the first embodiment; in the case of inter-band CA,

corresponding MPR₁Determined according to the transmission bandwidth and modulation order of PUCCH-3/PUSCH-3, A-MPR₁Determined according to the transmission bandwidth of PUCCH-3/PUSCH-3 and the RB starting position,

corresponding MPR₂Determined according to the transmission bandwidth and modulation order of PUCCH-4/PUSCH-4, A-MPR₂According to the transmission bandwidth and RB starting position of PUCCH-4/PUSCH-4, P corresponding to the uplink channel^H _CMAXBased on the corresponding parameters of CC1 and CC2, e.g. MPR for PUCCH-3/PUSCH-3₁、A-MPR₁And MPR corresponding to PUCCH-4/PUSCH-4₂、A-MPR₂Calculated according to the corresponding formula in the first embodiment.

Referring to fig. 6, an embodiment of the present invention provides a terminal, where the terminal includes:

a power determining unit 60, configured to determine, when an uplink channel exists in a current uplink subframe, according to an assumed condition that there is no SRS that is transmitted in an overlapping manner with the uplink channel, a maximum terminal transmit power applied to the uplink channel and/or a maximum carrier transmit power, which is applied to the uplink channel and corresponds to each carrier that has uplink channel transmission, of the uplink channel; when SRS transmission exists in a current uplink subframe, determining the maximum transmitting power of a terminal applied to the SRS and/or the maximum transmitting power of a carrier applied to the SRS corresponding to each carrier with the SRS transmission according to the actual overlapping condition in the SRS transmission time;

and the power control unit 61 is configured to perform power control on an uplink channel and/or an SRS in the current uplink subframe according to the determined maximum transmission power of the carrier and the determined maximum transmission power of the terminal.

Further, the power determining unit 60 is configured to:

determining the maximum transmitting power of a terminal applied to an uplink channel according to the transmission related information of all uplink channels simultaneously transmitted on all carriers in the current subframe; and/or the presence of a gas in the gas,

and determining the maximum transmitting power of the carrier, which is applied to the uplink channel on the carrier, corresponding to each carrier with the uplink channel transmission according to the transmission related information of all uplink channels simultaneously transmitted on all carriers in the current subframe, or determining the maximum transmitting power of the carrier, which is applied to the uplink channel on the carrier, corresponding to the carrier according to the transmission related information of the uplink channel on each carrier with the uplink channel transmission.

Further, the power determining unit 60 is configured to:

determining a power back-off value of a terminal according to the total transmission bandwidth, resource block RB allocation information and the highest order modulation mode of each uplink channel simultaneously transmitted on all carriers, and determining the maximum transmission power of the terminal applied to the uplink channel according to the power back-off value of the terminal; or,

determining a power back-off value of each carrier according to the transmission bandwidth, RB allocation information and a modulation mode of an uplink channel on each carrier with uplink channel transmission, and determining the maximum transmitting power of the terminal applied to the uplink channel according to the power back-off values of all carriers with uplink channel transmission; or,

and respectively determining the power back-off value of each carrier according to the total transmission bandwidth, RB allocation information and the highest-order modulation mode of each uplink channel on each carrier with uplink channel transmission, and determining the maximum transmitting power of the terminal applied to the uplink channel according to the power back-off values of all carriers with uplink channel transmission.

Further, the power determining unit 60 is configured to:

determining a power back-off value of each carrier with uplink channel transmission according to the total transmission bandwidth, RB allocation information and the highest-order modulation mode of all uplink channels simultaneously transmitted on all carriers, and determining the maximum transmission power of the carrier, which is applied to the uplink channel on each carrier, corresponding to each carrier according to the power back-off value of each carrier with uplink channel transmission; or,

determining a power back-off value of each carrier according to the transmission bandwidth, RB allocation information and a modulation mode of an uplink channel on each carrier with uplink channel transmission, and determining the maximum transmission power of the carrier, which is applied to the uplink channel on each carrier and corresponds to the carrier, according to the power back-off value of each carrier with uplink channel transmission; or,

and respectively determining the power back-off value of each carrier according to the total transmission bandwidth, RB allocation information and the highest-order modulation mode of each uplink channel on each carrier with uplink channel transmission, and respectively determining the maximum transmission power of the carrier, which is applied to the uplink channel on each carrier, corresponding to each carrier with uplink channel transmission according to the power back-off value of each carrier with uplink channel transmission.

Further, the power determining unit 60 is configured to:

determining the maximum transmitting power of a terminal applied to the SRS according to the transmission related information of all SRS and uplink channels which are transmitted in an overlapped manner in the SRS transmission time on all carriers in the current subframe; and/or the presence of a gas in the gas,

according to the transmission related information of all SRS and uplink channels which are transmitted in an SRS transmission time in all carriers in the current subframe in an overlapping manner, determining the carrier maximum transmission power of the SRS, which is applied to each carrier and corresponds to the carrier with the SRS transmission, or respectively according to the transmission related information of the SRS on each carrier with the SRS transmission, determining the carrier maximum transmission power of the SRS, which is applied to the carrier and corresponds to the carrier, or respectively according to the transmission related information of the SRS and the uplink channels which are transmitted in an overlapping manner in the SRS transmission time on each carrier with the SRS transmission, determining the carrier maximum transmission power of the SRS, which is applied to the carrier and corresponds to the carrier.

Further, the power determining unit 60 is configured to:

determining a power back-off value of a terminal according to total transmission bandwidths, RB allocation information and a highest order modulation mode of all SRS and uplink channels which are transmitted in an SRS transmission time in an overlapping manner on all carriers, and determining the maximum transmission power of the terminal applied to the SRS according to the power back-off value of the terminal; or,

respectively determining a power back-off value of each carrier according to the transmission bandwidth, RB allocation information and a modulation mode of the SRS on each carrier with SRS transmission, or respectively according to the SRS on each carrier with SRS transmission, the total transmission bandwidth, RB allocation information and the highest-order modulation mode of an uplink channel which is overlapped with the SRS on the carrier; and respectively determining a power back-off value of each carrier according to the transmission bandwidth, RB allocation information and modulation mode of an uplink channel on each carrier which does not have an SRS and has the uplink channel overlapped with the SRS in the SRS transmission time, or respectively according to the total transmission bandwidth, RB allocation information and the highest-order modulation mode of each uplink channel on each carrier which does not have the SRS and has the uplink channel overlapped with the SRS in the SRS transmission time, and determining the maximum transmission power of the terminal applied to the SRS according to the determined power back-off values of all the carriers.

Further, the power determining unit 60 is configured to:

determining a power back-off value of each carrier with SRS transmission according to the total transmission bandwidth, RB allocation information and the highest-order modulation mode of all SRS and uplink channels which are transmitted in an overlapped mode in the SRS transmission time on all carriers, and determining the carrier maximum transmission power, which is applied to the SRS on each carrier and corresponds to the carrier, according to the power back-off value of each carrier with SRS transmission; or,

respectively determining a power back-off value of each carrier according to the transmission bandwidth, RB allocation information and a modulation mode of the SRS on each carrier with SRS transmission, and determining the carrier maximum transmission power of the SRS, which is applied to the carrier and corresponds to the carrier, according to the power back-off value of the carrier; or,

and respectively determining a power back-off value of each carrier according to the SRS on each carrier with SRS transmission and the total transmission bandwidth, RB allocation information and the highest-order modulation mode of an uplink channel on the carrier, which is overlapped with the SRS, and determining the carrier maximum transmission power, which is applied to the SRS on the carrier and corresponds to the carrier, according to the power back-off value of the carrier.

Further, the power control unit 61 is configured to:

determining the target transmitting power of the uplink channel according to the maximum transmitting power of the carrier of the uplink channel applied to the carrier corresponding to the carrier where each uplink channel is transmitted; judging whether the sum of the target transmitting power of each uplink channel in the current subframe exceeds the maximum transmitting power of the terminal applied to the uplink channel; determining the actual transmitting power of the actually transmitted uplink channel according to the judgment result; and/or the presence of a gas in the gas,

determining the target transmitting power of the SRS according to the maximum transmitting power of the SRS carrier applied to the carrier corresponding to the carrier where each SRS is transmitted; judging whether the sum of the target transmitting power of each SRS in the current subframe exceeds the maximum transmitting power of the terminal applied to the SRS and/or judging whether the sum of the target transmitting power of each SRS in the current subframe and the target transmitting power of an uplink channel which is transmitted in an overlapping manner with the SRS exceeds the maximum transmitting power of the terminal applied to the SRS; and determining the actual transmitting power of the SRS which is actually transmitted according to the judgment result.

Further, the power control unit 61 is configured to:

if the sum of the target transmitting power of each uplink channel in the current subframe is judged to exceed the maximum transmitting power of the terminal applied to the uplink channel, the target transmitting power of at least one uplink channel is adjusted, so that the sum of the target transmitting power of each uplink channel after power adjustment does not exceed the maximum transmitting power of the terminal applied to the uplink channel, and the current target transmitting power of each uplink channel after power adjustment is used as the actual transmitting power of the corresponding uplink channel; if the sum of the target transmitting power of each uplink channel in the current subframe does not exceed the maximum transmitting power of the terminal applied to the uplink channel, taking the target transmitting power of each uplink channel as the actual transmitting power of the corresponding uplink channel;

if the sum of the target transmitting powers of all the SRSs in the current subframe exceeds the maximum transmitting power of the terminal applied to the SRS and/or the sum of the target transmitting power of all the SRSs and the target transmitting power of the uplink channel which is transmitted in an overlapped mode with the SRS exceeds the maximum transmitting power of the terminal applied to the SRS, determining the actual transmitting power of the SRS to be zero, otherwise, taking the target transmitting power of all the SRSs as the actual transmitting power of the corresponding SRS; or if the sum of the target transmitting powers of the SRSs in the current subframe exceeds the maximum transmitting power of the terminal applied to the SRS, adjusting the target transmitting power of at least one SRS to enable the sum of the target transmitting powers of the SRSs after power adjustment not to exceed the maximum transmitting power of the terminal applied to the SRS, determining whether the sum of the target transmitting power of each SRS after power adjustment and the target transmitting power of an uplink channel which is transmitted in an overlapped mode with the SRS exceeds the maximum transmitting power of the terminal applied to the SRS or not, if the sum of the target transmitting power of each SRS after power adjustment and the target transmitting power of the uplink channel which is transmitted in an overlapped mode with the SRS is determined to exceed, determining that the actual transmitting power of the SRS is zero, and if the sum of the target.

Further, the power backoff value includes MPR and a-MPR.

Further, the uplink channel includes: at least one of a Physical Uplink Control Channel (PUCCH), a Physical Uplink Shared Channel (PUSCH) and a Physical Random Access Channel (PRACH).

In conclusion, the beneficial effects of the invention include:

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.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

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

1. A power control method is applied to a scene that Sounding Reference Signals (SRS) and uplink channels are overlapped on transmission time, and is characterized by comprising the following steps:

if an uplink channel exists in the current uplink subframe, the terminal determines the maximum transmitting power of the terminal applied to the uplink channel and/or the maximum transmitting power of the carrier applied to the uplink channel corresponding to each carrier with uplink channel transmission according to the assumption that the SRS overlapped with the uplink channel transmission does not exist;

2. The method according to claim 1, wherein the terminal determines the maximum terminal transmit power applied to the uplink channel and/or the maximum carrier transmit power applied to the uplink channel on each carrier on which there is uplink channel transmission according to the assumption that there is no SRS overlapping with the uplink channel transmission, and specifically includes:

3. The method according to claim 2, wherein the determining, according to the transmission-related information of all uplink channels simultaneously transmitted on all carriers in the current subframe, the maximum transmit power of the terminal applied to the uplink channel specifically includes:

4. The method according to claim 2, wherein the determining, according to the transmission-related information of all uplink channels simultaneously transmitted on all carriers in the current subframe, the maximum transmission power of the carrier applied to the uplink channel on each carrier where the uplink channel transmission exists, or determining, according to the transmission-related information of the uplink channel on each carrier where the uplink channel transmission exists, the maximum transmission power of the carrier applied to the uplink channel on the carrier corresponding to the carrier, specifically includes:

5. The method according to claim 1, wherein the terminal determines, according to an actual overlap condition in the SRS transmission time, a maximum terminal transmission power applied to the SRS and/or a maximum carrier transmission power applied to the SRS on each carrier corresponding to a carrier where the SRS is transmitted, specifically including:

determining the maximum transmitting power of the terminal applied to the SRS according to the transmission related information of all SRS and uplink channels which are transmitted in an overlapped manner in the SRS transmission time on all carriers; and/or the presence of a gas in the gas,

according to the transmission related information of all SRS and uplink channels which are transmitted in an SRS transmission time in an overlapping manner on all carriers, determining the carrier maximum transmission power of the SRS, which is applied to each carrier and corresponds to the carrier with the SRS transmission, or respectively according to the transmission related information of the SRS on each carrier with the SRS transmission, determining the carrier maximum transmission power of the SRS, which is applied to each carrier and corresponds to the carrier, or respectively according to the transmission related information of the SRS and the uplink channels which are transmitted in an overlapping manner in the SRS transmission time on each carrier with the SRS transmission, determining the carrier maximum transmission power of the SRS, which is applied to each carrier and corresponds to the carrier.

6. The method according to claim 5, wherein the determining, according to the transmission-related information of all the SRSs and uplink channels that are transmitted in an SRS transmission time overlapping on all the carriers, the maximum transmission power of the terminal applied to the SRS specifically includes:

respectively determining a power backoff value of each carrier according to the transmission bandwidth, RB allocation information and a modulation mode of the SRS on each carrier with SRS transmission, or respectively according to the SRS on each carrier with SRS transmission and the total transmission bandwidth, RB allocation information and the highest-order modulation mode of an uplink channel which is overlapped with the SRS on the carrier; determining a power backoff value of each carrier according to the transmission bandwidth, RB allocation information and modulation mode of each uplink channel on the carrier without the SRS and with the uplink channel overlapped with the SRS in the SRS transmission time, or according to the total transmission bandwidth, RB allocation information and highest-order modulation mode of each uplink channel on the carrier without the SRS and with the uplink channel overlapped with the SRS in the SRS transmission time; and determining the maximum transmitting power of the terminal applied to the SRS according to the determined power back-off values of all the carriers.

7. The method according to claim 5, wherein the determining, according to transmission-related information of all SRS and uplink channels that are transmitted in an SRS transmission time in an overlapping manner on all carriers, a carrier maximum transmit power of an SRS that is applied to each carrier corresponding to a carrier where the SRS is transmitted, or determining, according to transmission-related information of an SRS on each carrier where the SRS is transmitted, a carrier maximum transmit power of an SRS that is applied to the carrier corresponding to the carrier, or determining, according to transmission-related information of an SRS and uplink channel that are transmitted in an overlapping manner in an SRS transmission time on each carrier where the SRS is transmitted, a carrier maximum transmit power of an SRS that is applied to the carrier corresponding to the carrier, specifically includes:

8. The method of claim 1, wherein the terminal performs power control on an uplink channel and/or an SRS in a current uplink subframe according to the determined maximum transmission power of the carrier and the determined maximum transmission power of the terminal, and specifically comprises:

the terminal determines the target transmitting power of the SRS according to the maximum transmitting power of the SRS applied to the carrier corresponding to the carrier where each SRS is transmitted; judging whether the sum of the target transmitting power of each SRS in the current subframe exceeds the maximum transmitting power of the terminal applied to the SRS and/or judging whether the sum of the target transmitting power of each SRS in the current subframe and the target transmitting power of an uplink channel which is transmitted in an overlapping manner with the SRS exceeds the maximum transmitting power of the terminal applied to the SRS; and determining the actual transmitting power of the SRS which is actually transmitted according to the judgment result.

9. The method of claim 8, wherein the determining the actual transmission power of the actually transmitted uplink channel according to the determination result specifically includes:

if the terminal judges that the sum of the target transmitting power of each uplink channel in the current subframe exceeds the maximum transmitting power of the terminal applied to the uplink channel, the terminal adjusts the target transmitting power of at least one uplink channel so that the sum of the target transmitting power of each uplink channel after power adjustment does not exceed the maximum transmitting power of the terminal applied to the uplink channel, and takes the current target transmitting power of each uplink channel after power adjustment as the actual transmitting power of the corresponding uplink channel; if the terminal judges that the sum of the target transmitting power of each uplink channel in the current subframe does not exceed the maximum transmitting power of the terminal applied to the uplink channel, the target transmitting power of each uplink channel is taken as the actual transmitting power of the corresponding uplink channel;

determining the actual transmitting power of the actually transmitted SRS according to the judgment result, specifically including:

if the terminal judges that the sum of the target transmitting power of each SRS in the current subframe exceeds the maximum transmitting power of the terminal applied to the SRS and/or judges that the sum of the target transmitting power of each SRS and the target transmitting power of an uplink channel which is transmitted in an overlapped mode with the SRS exceeds the maximum transmitting power of the terminal applied to the SRS, the actual transmitting power of the SRS is determined to be zero, otherwise, the target transmitting power of each SRS is taken as the actual transmitting power of the corresponding SRS; or,

if the sum of the target transmitting powers of all the SRSs in the current subframe is judged to exceed the maximum transmitting power of the terminal applied to the SRS, the target transmitting power of at least one SRS is adjusted, so that the sum of the target transmitting powers of all the SRSs after power adjustment does not exceed the maximum transmitting power of the terminal applied to the SRS, whether the sum of the target transmitting power of all the SRSs after power adjustment and the target transmitting power of an uplink channel which is transmitted in an overlapped mode with the SRS exceeds the maximum transmitting power of the terminal applied to the SRS or not is determined, if the sum of the target transmitting power of all the SRSs after power adjustment and the target transmitting power of the uplink channel which is transmitted in an overlapped mode with the SRS is determined to exceed the maximum transmitting power of the terminal.

10. The method of any of claims 3, 4, 6, 7, wherein the power backoff value comprises a maximum power backoff value MPR and an additional maximum power backoff value a-MPR.

11. The method of any of claims 1-9, wherein the uplink channel comprises: at least one of a Physical Uplink Control Channel (PUCCH), a Physical Uplink Shared Channel (PUSCH) and a Physical Random Access Channel (PRACH).

12. A terminal, characterized in that the terminal comprises:

13. The terminal of claim 12, wherein the power determination unit is to:

14. The terminal of claim 13, wherein the power determination unit is to:

15. The terminal of claim 13, wherein the power determination unit is to:

16. The terminal of claim 12, wherein the power determination unit is to:

17. The terminal of claim 16, wherein the power determination unit is to:

18. The terminal of claim 16, wherein the power determination unit is to:

19. The terminal of claim 12, wherein the power control unit is to:

20. The terminal of claim 19, wherein the power control unit is to:

21. The terminal of any of claims 14, 15, 17, 18, wherein the power backoff value comprises a maximum power backoff value MPR and an additional maximum power backoff value a-MPR.

22. The terminal of any of claims 12-20, wherein the uplink channel comprises: at least one of a Physical Uplink Control Channel (PUCCH), a Physical Uplink Shared Channel (PUSCH) and a Physical Random Access Channel (PRACH).