CN110536400B - Method and device for sending power headroom report - Google Patents

Method and device for sending power headroom report Download PDF

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CN110536400B
CN110536400B CN201810516673.0A CN201810516673A CN110536400B CN 110536400 B CN110536400 B CN 110536400B CN 201810516673 A CN201810516673 A CN 201810516673A CN 110536400 B CN110536400 B CN 110536400B
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power
uplink carrier
active bandwidth
supported
power headroom
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CN110536400A (en
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刘哲
彭金磷
唐浩
唐臻飞
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/365—Power headroom reporting

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a method and a device for sending a power headroom report, wherein the method comprises the following steps: determining a power headroom of a first uplink carrier according to a maximum transmission power supported by the first uplink carrier and a total transmission power of N activated bandwidth parts, wherein the first uplink carrier comprises the N activated bandwidth parts, and N is an integer greater than or equal to 2; sending a power headroom report, wherein the power headroom report is used for indicating the power headroom of the first uplink carrier. By adopting the method and the device, the reporting of the power headroom report can be determined.

Description

Method and device for sending power headroom report
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for sending a power headroom report.
Background
In a wireless communication system, a User Equipment (UE) may transmit an uplink signal on an uplink carrier according to scheduling of a base station. The specific process can be as follows: the UE determines a Power Headroom (PH) of an uplink carrier, generates a Power Headroom Report (PHR) based on the PH, and reports the PHR to the base station. The base station may schedule the UE to transmit an uplink signal on the uplink carrier according to the PHR. For example, when the PH value corresponding to the PHR is greater than 0, it indicates that the UE has remaining power, and the uplink transmission bandwidth can be further expanded, and the larger the PH value is, the more the remaining power of the UE is, and accordingly, the base station may allocate more Physical Resource Block (PRB) resources to the UE, and the more the resources allocated by the base station to the UE is, the higher the data transmission rate between the base station and the UE is. Since PHR reporting plays an important role in uplink transmission, how to report PHR is worth being studied.
Disclosure of Invention
The application provides a method and a device for sending a power headroom report, which are used for determining reporting of a PHR.
In a first aspect, the present application provides a method of transmitting a power headroom report, comprising: determining a power headroom of a first uplink carrier according to a maximum transmission power supported by the first uplink carrier and a total transmission power of N activated bandwidth parts, wherein the first uplink carrier comprises the N activated bandwidth parts, and N is an integer greater than or equal to 2; sending a power headroom report, wherein the power headroom report is used for indicating the power headroom of the first uplink carrier.
In this embodiment of the present application, the maximum transmit power supported by the first uplink carrier and the total transmit power of N active bandwidth portions included in the first uplink carrier are determined, and a power headroom of the first uplink carrier is determined based on the maximum transmit power supported by the first uplink carrier and the total transmit power of the N active bandwidth portions; compared with the conventional method, the maximum transmission power supported by the first uplink carrier and the transmission power of the activated bandwidth part are determined, and the power headroom of the first uplink carrier is determined based on the maximum transmission power supported by the first uplink carrier and the transmission power of the activated bandwidth part, so that the accuracy of reporting the power headroom report can be improved.
Specifically, the maximum transmission power supported by the first uplink carrier is determined according to a power attenuation factor, which is determined according to a waveform used when the uplink signal is transmitted in the N active bandwidth portions.
In one example, the power attenuation factor is a first power attenuation factor if a cyclic prefix orthogonal frequency division multiplexing, CP-OFDM, waveform is used in each of the N active portion bandwidths; if the CP-OFDM waveform and the orthogonal frequency division multiplexing DFT-s-OFDM waveform expanded by discrete Fourier transform are used in the N active part bandwidths, the power attenuation factor is a second power attenuation factor; the power reduction power factor is a third power reduction factor if the DFT-s-OFDM waveform is used for all of the N active portion bandwidths. The first power attenuation factor is smaller than or equal to the second power attenuation factor, and the second power attenuation factor is smaller than or equal to the third power attenuation factor.
It can be seen that, in the embodiment of the present application, the more the number of uplink active bandwidth portions whose actual transmission waveforms are DFT-s-OFDM is, the larger the introduced power attenuation is, the smaller the calculated maximum transmission power supported by the first uplink carrier is, the more the number of uplink active bandwidth portions whose actual transmission waveforms are CP-OFDM is, the smaller the introduced power attenuation factor is, the larger the calculated maximum transmission power supported by the first uplink carrier is, so that the calculation of the maximum transmission power supported by the first uplink carrier is more accurate.
In this embodiment of the present application, the maximum transmit power supported by the first uplink carrier may satisfy the following condition:
PCMAX_L,f,c≤PCMAX,f,c≤PCMAX_H,f,c；
wherein, PCMAX,f,cRepresents a maximum transmit power supported by the first uplink carrier, PCMAX_L,f,cRepresents a lower limit of a maximum transmit power supported by the first uplink carrier, the PCMAX_H,f,cAt least one of a maximum lower transmit power limit supported by the first uplink carrier and a maximum upper transmit power limit supported by the first uplink carrier is determined according to the power attenuation factor.
In an example of the present application, the power headroom report is a power headroom report of a first uplink signal, and the method further includes: and if at least one target active bandwidth part in the N active bandwidth parts is used for transmitting a first uplink signal, determining the total transmission power of the N active bandwidth parts according to the actual transmission power of the target active bandwidth part.
In another example of the present application, the power headroom report is a power headroom report of a first uplink signal, and the method further includes: and if the N active bandwidth parts are not used for transmitting the first uplink signal, determining the total transmitting power of the N active bandwidth parts according to the virtual transmitting power of the N active bandwidth parts.
In a second aspect, the present application provides a method of transmitting a power headroom report, comprising: determining a power margin of a first activated bandwidth part according to a maximum transmission power supported by a first uplink carrier, a transmission power of the first activated bandwidth part and a first power sharing factor, wherein the first uplink carrier comprises the first activated bandwidth part, and the first power sharing factor is a power sharing factor corresponding to the first activated bandwidth part; transmitting a power headroom report indicating a power headroom of the first active bandwidth portion.
In the embodiment of the present application, the transmission power of the first active bandwidth part is determined according to the maximum transmission power supported by the first uplink carrier, the transmission power of the first active bandwidth part, and the first power sharing factor corresponding to the first active bandwidth part, and compared with a conventional method, the accuracy of reporting the power headroom can be improved by calculating the transmission power of the first active bandwidth part according to the maximum transmission power supported by the first uplink carrier and the transmission power of the first active bandwidth part.
In one possible implementation, the first uplink carrier includes N active bandwidth parts, the first active bandwidth part is an active bandwidth part of the N active bandwidth parts, and N is an integer greater than or equal to 2; the maximum transmit power supported by the first uplink carrier is determined based on a power attenuation factor determined based on a waveform used when the N active bandwidth portions transmit uplink signals.
In one example, the power attenuation factor is a first power attenuation factor if a cyclic prefix orthogonal frequency division multiplexing, CP-OFDM, waveform is used in each of the N active portion bandwidths; if the CP-OFDM waveform and the orthogonal frequency division multiplexing DFT-s-OFDM waveform expanded by discrete Fourier transform are used in the N active part bandwidths, the power attenuation factor is a second power attenuation factor; the power reduction power factor is a third power reduction factor if the DFT-s-OFDM waveform is used for all of the N active portion bandwidths. The first power attenuation factor is smaller than or equal to the second power attenuation factor, and the second power attenuation factor is smaller than or equal to the third power attenuation factor.
Specifically, the maximum transmit power supported by the first uplink carrier meets the following condition:
PCMAX_L,f,c≤PCMAX,f,c≤PCMAX_H,f,c；
wherein, PCMAX,f,cRepresents a maximum transmit power supported by the first uplink carrier, PCMAX_L,f,cRepresents a lower limit of a maximum transmit power supported by the first uplink carrier, the PCMAX_H,f,cAt least one of a maximum lower transmit power limit supported by the first uplink carrier and a maximum upper transmit power limit supported by the first uplink carrier is determined according to the power attenuation factor.
In a third aspect, a method for transmitting a power headroom report is provided, including: determining a power headroom for a first active bandwidth part based on a maximum transmit power supported by the first active bandwidth part and a transmit power of the first active bandwidth part; transmitting a power headroom report indicating a power headroom of the first active bandwidth portion.
As can be seen from the above, in the embodiment of the present application, the power headroom of the first active bandwidth part is calculated according to the maximum transmission power supported by the first active bandwidth part and the transmission power of the first active bandwidth part, and compared to the conventional method, the power headroom of the first active bandwidth part is calculated according to the maximum transmission power supported by the first uplink carrier and the transmission power of the first active bandwidth part, so that the accuracy of reporting the power headroom can be improved.
In an embodiment of the application, the maximum transmit power supported by the first active bandwidth part is determined according to a maximum transmit power pre-configured to the first active bandwidth part.
In an example, the maximum transmit power supported by the first active bandwidth portion may be equal to a maximum transmit power preconfigured for the first active bandwidth portion.
In another example, the maximum transmit power supported by the first active bandwidth portion is greater than or equal to a lower maximum transmit power limit supported by the first active bandwidth portion, the maximum transmit power supported by the first active bandwidth portion being less than or equal to an upper maximum transmit power limit supported by the first active bandwidth portion;
at least one of a lower maximum transmit power limit supported by the first active bandwidth portion and an upper maximum transmit power limit supported by the first active bandwidth portion is determined based on a maximum transmit power pre-configured for the first active bandwidth portion.
Based on the inventive concept of the first aspect, in a fourth aspect, the present application provides an apparatus, which may be a terminal device, or an apparatus (e.g. a chip) capable of supporting the terminal device to implement the method of the first aspect, where the apparatus may include:
a processing unit, configured to determine a power headroom of a first uplink carrier according to a maximum transmit power supported by the first uplink carrier and a total transmit power of N active bandwidth portions, where the first uplink carrier includes the N active bandwidth portions, and N is an integer greater than or equal to 2.
A transceiver unit, configured to send a power headroom report, where the power headroom report is used to indicate a power headroom of the first uplink carrier.
For the description of the processing unit and the transceiver unit, reference may be made to the description of the first aspect, and details are not repeated here.
Based on the inventive concept of the first aspect, in a fifth aspect, the present application provides an apparatus, which may be a terminal device, or an apparatus (e.g. a chip) capable of supporting the terminal device to implement the method of the first aspect, where the apparatus may include:
a communication interface;
the memory is used for storing program instructions;
a processor, configured to call and execute the program instructions stored in the memory, and receive and/or send data through the communication interface, thereby implementing the method according to the first aspect.
Based on the inventive concept of the second aspect, in a sixth aspect, the present application provides an apparatus, which may be a terminal device, or an apparatus (e.g. a chip) capable of supporting the terminal device to implement the method of the second aspect, and the apparatus may include:
a processing unit, configured to determine a power headroom of a first active bandwidth portion according to a maximum transmit power supported by a first uplink carrier, a transmit power of the first active bandwidth portion, and a first power sharing factor, where the first uplink carrier includes the first active bandwidth portion, and the first power sharing factor is a power sharing factor corresponding to the first active bandwidth portion.
A transceiver unit configured to transmit a power headroom report indicating a power headroom of the first active bandwidth part.
For the description of the processing unit and the transceiver unit, reference may be made to the description of the second aspect, which is not repeated herein.
Based on the inventive concept of the second aspect, in a seventh aspect, the present application provides an apparatus, which may be a terminal device, or an apparatus (e.g. a chip) capable of supporting the terminal device to implement the method of the second aspect, and the apparatus may include:
a communication interface;
the memory is used for storing program instructions;
and the processor is used for calling and executing the program instructions stored in the memory, receiving and/or sending data through the communication interface and realizing the method of the second aspect.
Based on the inventive concept of the third aspect, in an eighth aspect, the present application provides an apparatus, which may be a terminal device, or an apparatus (e.g. a chip) capable of supporting the terminal device to implement the method of the third aspect, and the apparatus may include:
a processing unit configured to determine a power headroom for a first active bandwidth part based on a maximum transmit power supported by the first active bandwidth part and a transmit power of the first active bandwidth part.
A transceiver unit configured to transmit a power headroom report indicating a power headroom of the first active bandwidth part.
For the description of the processing unit and the transceiver unit, reference may be made to the description of the third aspect, which is not described herein again.
Based on the inventive concept of the third aspect, in a ninth aspect, the present application provides an apparatus, which may be a terminal device, or an apparatus (e.g. a chip) capable of supporting the terminal device to implement the method of the third aspect, and the apparatus may include:
a communication interface;
the memory is used for storing program instructions;
and the processor is used for calling and executing the program instructions stored in the memory, receiving and/or sending data through the communication interface and realizing the method of the third aspect.
In a tenth aspect, the present application provides a computer storage medium having stored thereon computer instructions that, when executed by a computer, cause the computer to perform the method of any of the first to third aspects described above.
In an eleventh aspect, the present application provides a computer program comprising computer instructions which, when executed by a computer, cause the computer to perform the method of any one of the first to third aspects. In a twelfth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the first to third aspects described above.
In a thirteenth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method according to any one of the first to third aspects.
In a fourteenth aspect, the present application provides a communication system comprising the apparatus of any of the above fourth to ninth aspects.
Drawings
Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;
fig. 2 is a flowchart of a method for reporting power headroom according to an embodiment of the present disclosure;
fig. 3 is a flowchart of another method for reporting power headroom according to an embodiment of the present disclosure;
fig. 4 is a flowchart for determining a maximum transmit power supported by a first uplink carrier according to an embodiment of the present disclosure;
fig. 5 is a flowchart of another method for reporting power headroom according to an embodiment of the present disclosure;
FIG. 6 is a schematic structural diagram of an apparatus according to an embodiment of the present disclosure;
FIG. 7 is a schematic view of another embodiment of the apparatus of the present application;
fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Fig. 1 illustrates a communication system 100 provided in an embodiment of the present application, where the communication system 100 may include a network device 101 and a terminal device 102.
The network device 101 may provide a service related to radio access for the terminal device 102, and implement one or more of the following functions: wireless physical layer functions, resource scheduling and radio resource management, quality of service (QoS) management, radio access control, and mobility management functions. The network device 101 and the terminal device 102 may be connected via an air interface, so as to implement communication between the network device 101 and the terminal device 102.
In this embodiment, the terminal device 102 may transmit an uplink signal on an uplink carrier according to the scheduling of the network device 101. The specific process can be as follows: the terminal device 102 determines a Power Headroom (PH) of the uplink carrier, generates a Power Headroom Report (PHR) based on the PH, and reports the PHR to the network device 101. The network device 101 may schedule the terminal device 102 to transmit the uplink signal on the uplink carrier according to the PHR. For example, when a PH value corresponding to the PHR is greater than 0, it indicates that the terminal device 102 has remaining power, and the uplink transmission bandwidth may be further expanded, and the larger the PH value is, the more the remaining power of the terminal device 102 is, and accordingly, the network device 101 may allocate more Physical Resource Block (PRB) resources to the terminal device 102, and the more the network device 101 allocates resources to the terminal device 102 is, the higher the transmission rate between the network device 101 and the terminal device 102 is.
In the 5th generation (5G) New Radio (NR) system, a concept of bandwidth part (BWP) is proposed, and data transmission between the network device 101 and the terminal device 102 is discussed and supported in a two-step resource manner, that is, the network device 101 may first send BWP configuration information to the terminal device 102, then allocate resources to the terminal device 102 in the configured BWP, and transmit data in the allocated resources. In NR, one uplink carrier may support only one active BWP, and the process of the terminal device 102 to calculate the power headroom may be as follows: the terminal device 102 first determines the maximum transmit power supported by the uplink carrier, then the terminal device 102 calculates the transmit power on the active BWP of the uplink carrier, and finally the terminal device 102 determines the power headroom of the terminal device 102 according to the difference between the maximum transmit power supported by the uplink carrier and the transmit power of the active BWP.
In NR, it is also desirable to support multiple active BWPs on one carrier, and if the conventional way of calculating the power headroom is used, the problem of inaccurate reporting of the power headroom may occur. For example, there are two active BWPs on an upstream carrier, BWP1 and BWP2, respectively, and the calculation is performedIt is determined that the maximum transmit power supported by terminal device 102 on the upstream carrier is 23dBm, the transmit power at BWP1 is 20dBm, the transmit power at BWP2 is 20dBm, and if the conventional power headroom calculation method is used, the power headroom of terminal device 102 at BWP1 is 3dBm (23dBm-20dBm is 3dBm) and the power headroom at BWP2 is 3dBm (23dBm-20dBm is 3 dBm). But in practice the total transmit power of end device 102 on BWP1 and BWP2 has reached 23dBm (23 dBm-10 lg (10 dBm)2+102) At this time), the actual power headroom of the terminal apparatus 102 on the entire uplink carrier is 0.
For ease of understanding, the illustrations of the concepts related to the present application are given for reference as follows:
1) the network device may be a device in a network that connects the terminal device to the wireless network. The network device is a node in a radio access network, which may also be referred to as a base station, and may also be referred to as a Radio Access Network (RAN) node (or device). Currently, some examples of network devices are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In addition, in a network structure, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node. The structure separates the protocol layers of the eNB in a Long Term Evolution (LTE) system, the functions of part of the protocol layers are controlled in the CU in a centralized way, the functions of the rest part or all of the protocol layers are distributed in the DU, and the CU controls the DU in a centralized way.
2) A terminal device, also called a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), and the like.
3) The communication system may be a Radio Access Technology (RAT) system, such as a Code Division Multiple Access (CDMA), a Time Division Multiple Access (TDMA), a Frequency Division Multiple Access (FDMA), an Orthogonal Frequency Division Multiple Access (OFDMA), a single carrier frequency division multiple access (SC-FDMA), and other systems. The term "system" may be used interchangeably with "network". CDMA systems may implement wireless technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and the like. UTRA may include Wideband CDMA (WCDMA) technology and other CDMA variant technologies. CDMA2000 may cover the Interim Standard (IS) 2000(IS-2000), IS-95 and IS-856 standards. TDMA systems may implement wireless technologies such as global system for mobile communications (GSM). The OFDMA system may implement wireless technologies such as evolved universal terrestrial radio access (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash OFDMA, etc. UTRA and E-UTRA are UMTS as well as UMTS evolved versions. Various versions of 3GPP in Long Term Evolution (LTE) and LTE-based evolution are new versions of UMTS using E-UTRA. Furthermore, the communication system may also be adapted for future oriented communication technologies. The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.
In addition, it is to be understood that the terms first, second, etc. in the description of the present application are used for distinguishing between the descriptions and not necessarily for describing a sequential or chronological order.
Based on the communication system 100 provided in fig. 1, as shown in fig. 2, the present application provides a method flow for sending a power headroom report, in the flow shown in fig. 2, an execution subject of step S201 and step S202 may be a terminal device, or may be a device, such as a chip or a chip system, for supporting the terminal device to implement the functions of step S201 and step S202, in the embodiment of the present application, an execution subject of step S201 and step S202 may be a terminal device, for example, in the flow shown in fig. 2, an execution subject of step S203 and step S204 may be a network device, or may be a device, such as a chip or a chip system, for supporting the network device to implement the functions of step S203 and step S204, for example, in the embodiment of the present application, an execution subject of step S203 and step S204 may be a network device.
Step S201: and the terminal equipment determines the power margin of the first uplink carrier according to the maximum transmitting power supported by the first uplink carrier and the total transmitting power of the N activated bandwidth parts. Wherein the first uplink carrier may include the N active bandwidth parts, and N is an integer greater than or equal to 2.
In an example of the present application, the specific process of the step S201 may be: the terminal equipment determines the maximum transmitting power of the first uplink carrier, determines the total transmitting power of the N activated bandwidth parts, and determines the power margin of the first uplink carrier according to the maximum transmitting power of the first uplink carrier and the total transmitting power of the N activated bandwidth parts.
In an example of the present application, a method of determining a maximum transmit power supported by a first uplink carrier may be, but is not limited to, using the method provided in fig. 4 described below.
In an example of the present application, the power headroom of the first uplink carrier may be a difference between a maximum transmit power supported by the first uplink carrier and a total transmit power of the N active bandwidth parts, for example, the maximum transmit power supported by the first uplink carrier is 23dBm, the total transmit power of the N active bandwidth parts included in the first uplink carrier is 20dBm, and then the power headroom of the first uplink carrier may be 3 dBm.
In this embodiment of the present application, the power headroom of the first uplink carrier may be a power headroom of the first uplink carrier when transmitting the first uplink signal, and correspondingly, the power headroom report is a power headroom report of the first uplink signal, and a process of determining the total transmission power of the N activated bandwidth portions by the terminal device may be discussed in the following two cases:
in the first case: and if at least one target active bandwidth part in the N active bandwidth parts is used for transmitting a first uplink signal, determining the total transmission power of the N active bandwidth parts according to the actual transmission power of the target active bandwidth part. For the first case, the calculated total transmit power of the N active bandwidth portions may be referred to as the actual transmit power of the N active bandwidth portions. In the embodiments of the present application, at least one may be one, two, three or other more positive integers, and the present application is not limited thereto.
In this embodiment, the target active bandwidth part may be specifically one or more active bandwidth parts in the N active bandwidth parts, for example, 3 active bandwidth parts in the N active bandwidth parts are used for transmitting the first uplink signal, and then, the at least one target active bandwidth part specifically refers to the 3 active bandwidth parts for transmitting the first uplink signal. Similarly, if 1 active bandwidth part in the N active bandwidth parts is used for transmitting the first uplink signal, the at least one target active bandwidth part specifically refers to the 1 active bandwidth part used for transmitting the first uplink signal.
In an embodiment of the present application, the first uplink signal may be a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), or a Sounding Reference Signal (SRS).
In the embodiment of the present application, for a first case, taking a first uplink signal as a PUSCH signal as an example, how to determine a power headroom of a first uplink carrier is described in detail, specifically: the power headroom of the first uplink carrier may satisfy the following formula (1.1):
Figure BDA0001673446100000081
wherein the pH istype1,f,cRepresenting a power headroom, P, of the first uplink carrierCMAX,f,cRepresents a maximum transmit power supported by the first uplink carrier, the
Figure BDA0001673446100000082
Representing a total transmit power of N active bandwidth portions of the first uplink carrier f, PPUSCH,b,f,cA transmission power representing an active bandwidth part b of the first uplink carrier f, the
Figure BDA0001673446100000083
A linear value representing the transmission power of the active bandwidth part b of the first uplink carrier f. And if the activated bandwidth part b of the first uplink carrier f does not transmit the first uplink signal, then
Figure BDA0001673446100000084
Is 0. When P isCMAX,f,cIs less than
Figure BDA0001673446100000085
The terminal device determines the PHtype1,f,cIs 0.
In an example of the present application, the transmission power of the activated bandwidth part b of the first uplink carrier f may satisfy the following formula (1.2):
Figure BDA0001673446100000086
wherein, the PPUSCH,b,f,cRepresenting the transmission power of the active bandwidth part b of the first uplink carrier f; the P isO_PUSCH,b,f,cThe initial receiving power configured on the activated bandwidth part b of the first uplink carrier f is represented and determined according to RRC signaling and/or system broadcast message configuration information of a high-level signaling UE level; the above-mentioned
Figure BDA0001673446100000087
Indicating the number of PRBs scheduled for the terminal device on the activated bandwidth part b of the first uplink carrier f, and determining according to the scheduling information in the UE-level DCI; a is saidb,f,cThe path loss compensation factor which is configured for the terminal equipment on the activated bandwidth part b of the first uplink carrier f is represented and determined according to configuration information in RRC signaling of a UE level; the PLb,f,cIndicating that the terminal device is dependent on the reference signal qdDetermining the path loss value estimated for the first uplink carrier f in the activated bandwidth part b according to configuration information in RRC signaling of a UE level; deltaTF,b,f,cRepresenting transport format related parameters, determined from configuration information in UE-level RRC signaling or system messages; f isb,f,cThe indication is used for dynamically adjusting the uplink power of the terminal equipment and is determined according to DCI information of a UE level or a UE-group level.
In the second case: and if the N active bandwidth parts are not used for transmitting the first uplink signal, determining the total transmitting power of the N active bandwidth parts according to the virtual transmitting power of the N active bandwidth parts. For the second case, the calculated total transmit power of the N active bandwidth portions may be referred to as the virtual transmit power of the N active bandwidth portions.
For the second case, determining the power headroom of the first uplink carrier may be divided into the following ways: the first mode is that the power margin of the first uplink carrier is determined based on the sum of the virtual transmission power of N active bandwidth parts included in the first uplink carrier; the second mode is to determine the power headroom of the first uplink carrier based on the virtual transmission power of the first active bandwidth part included in the first uplink carrier, wherein the virtual transmission power of the first active bandwidth part is the maximum or the minimum in the N active bandwidth parts included in the first uplink carrier; the third method determines a power headroom of a first uplink carrier based on a virtual transmit power of a second active bandwidth part included in the first uplink carrier, the second active bandwidth part being any one of N active bandwidth parts included in the first uplink carrier.
In this embodiment of the present application, for a first manner of a second case, taking a first uplink signal as a PUSCH signal as an example, how to determine a power headroom of a first uplink carrier is described in detail as follows: the power headroom of the first uplink carrier satisfies the following formula (1.3):
Figure BDA0001673446100000091
wherein the pH istype1,f,cRepresenting a power headroom of the first uplink carrier, the
Figure BDA0001673446100000092
Represents a maximum transmit power supported by the first uplink carrier, the
Figure BDA0001673446100000093
Representing the total transmit power of the N active bandwidth portions, PPUSCH,b,f,cVirtual transmit power representing an active bandwidth portion, said
Figure BDA0001673446100000094
A linear value representing the virtual transmit power to activate BWP.
In an example of the application, the virtual transmit power P of the active bandwidth partPUSCH,b,f,cThe following formula (1.4) can be satisfied:
PPUSCH,b,f,c＝PO_PUSCH,b,f,c+αb,f,c·PLb,f,c+fb,f,c(ii) a Formula (1.4)
Wherein, the PPUSCH,b,f,cVirtual transmit power representing the active bandwidth portion, PO_PUSCH,b,f,cRepresents the initial received power configured on the activated bandwidth part b of the first uplink carrier f, the alphab,f,cRepresents a path loss compensation factor configured for a terminal device on an active bandwidth part b of the first uplink carrier f, the PLb,f,cIndicating that the terminal device is dependent on the reference signal qdEstimated path loss value in activated bandwidth part b for first uplink carrier f, fb,f,cAnd the representation is used for dynamically adjusting the uplink power of the terminal equipment.
In this embodiment of the present application, regarding a second manner of a second case, taking a first uplink signal as a PUSCH signal as an example, how to determine a power headroom of a first uplink carrier is described in detail as follows: the power headroom of the first uplink carrier satisfies the following formula (1.5) or satisfies the following formula (1.6):
Figure BDA0001673446100000095
wherein the pH istype1fcRepresenting a power headroom of the first uplink carrier, the
Figure BDA0001673446100000096
Represents a maximum transmit power, the MAX, supported by the first uplink carrierb∈f{PO_PUSCH,b,f,c+αb,f,c·PLb,f,c+fb,f,cAnd indicating the virtual transmission power of the first active bandwidth part, wherein the virtual transmission power value of the first active bandwidth part is the largest in the N active bandwidth parts included in the first uplink carrier.
Figure BDA0001673446100000097
Wherein the pH istype1，f，cRepresenting a power headroom of the first uplink carrier, the
Figure BDA0001673446100000098
Represents a maximum transmit power supported by the first uplink carrier, the MINb∈f{PO_PUSCH,b,f,c+αb,f,c·PLb,f,c+fb,f,cAnd indicating the virtual transmission power of the first active bandwidth part, wherein the virtual transmission power value of the first active bandwidth part is the smallest in the N active bandwidth parts included in the first uplink carrier.
In this embodiment of the present application, a third way for the second case is to take the first uplink signal as a PUSCH signal as an example, and how to determine the power headroom of the first uplink carrier is described in detail as follows: the power headroom of the first uplink carrier satisfies the following formula (17):
Figure BDA0001673446100000099
wherein the pH istype1,f,cRepresenting a power headroom of the first uplink carrier, the
Figure BDA00016734461000000910
Represents a maximum transmission power supported by the first uplink carrier, the (P)O_PUSCH,b＝0,f,c+αb＝0,f,c·PLb＝0,f,c+fb＝0,f,c) A virtual transmit power representing the second active bandwidth part, the second active bandwidth part being any one of N active bandwidth parts included in the first uplink carrier.
Step S202: and the terminal equipment sends a power headroom report, wherein the power headroom report is used for indicating the power headroom of the first uplink carrier.
Optionally, in this embodiment of the present application, when an uplink signal transmitted by a terminal device may be a PUCCH, the power headroom report is a power headroom report of the PUCCH; when an uplink signal transmitted by the terminal equipment is a PUSCH, the power headroom report is a PUSCH power headroom report; and when the uplink signal transmitted by the terminal equipment is the SRS, the power headroom report is the power headroom report of the SRS.
In the embodiment of the present application, the following 6 triggering conditions may be defined, and when one or more of the following 6 triggering conditions are satisfied or when the bandwidth part switching is activated, the terminal device may trigger reporting of the power headroom, that is, the terminal device sends a power headroom report.
First trigger condition: the PHR prohibit Timer (prohibit PHR-Timer) is overtime, and the path loss value of the serving cell is greater than or equal to the threshold value.
In the embodiment of the application, the terminal equipment side can set a prohibitPHR-Timer. When the prohibitPHR-Timer is overtime or overtime, and the path loss value of the service cell is larger than the threshold value, the terminal equipment can report the power headroom report to the network equipment through the data channel.
In an example of the first triggering condition, the path loss value of the serving cell may be configured by the network device for the terminal device, and the terminal device may restart the prohibitprr-Timer after reporting the power headroom report to the network device.
The second trigger condition is: the periodicPHR-Timer times out.
In the embodiment of the present application, the terminal device side may be provided with a periodicPHR-Timer. When the period PHR-Timer is overtime or overtime, the terminal equipment can report the power headroom report to the network equipment through the data channel. Further, after the terminal device reports the power headroom report to the network device, the periodicPHR-Timer may be restarted. For the second trigger condition, it may be considered that the terminal device periodically reports the power headroom report to the network device.
The third trigger condition: when PHR-related parameters or timers are reconfigured.
In this embodiment of the present application, if the terminal device receives first information sent by the network device, and the first information is used for a parameter value related to the reconfigured PHR or a value of the timer, the terminal device may report a power headroom report to the network device through a data channel.
A fourth trigger condition: an uplink secondary serving cell (SCell) configured for the terminal device is activated.
In this embodiment, a secondary serving cell and a primary serving cell may be configured for the terminal device, and when the secondary serving cell is activated, the terminal device may report a power headroom report to the network device.
Fifth trigger condition: a primary SCell (PSCell) of the second cell group is added for the terminal device.
In the embodiment of the application, when the PSCell is added to the terminal equipment, the terminal equipment may be triggered to report the power headroom report.
Sixth trigger condition: the inhibit phr-Timer times out and a power management maximum power reduction (P-MPR), which may also be referred to as a power backoff value, is greater than or equal to a threshold value.
In this embodiment of the present application, for any SCell, when the prohibitprr-Timer times out or times out, and the power backoff value is greater than or equal to the threshold value, the terminal device may report the power headroom report to the network device through the data channel. The threshold of the power back-off value may be configured by the network device for the terminal device. Further, the terminal device may restart the prohibitprr-Timer after reporting the power headroom report to the network device.
Step S203: a network device receives a power headroom report.
Step S204: and the network equipment determines the power headroom of the first uplink carrier according to the power headroom report.
In the present embodiment, still following the above example, the first uplink carrier includes 2 active BWPs, BWP1 and BWP2, respectively, and the maximum transmit power supported by the first uplink carrier is 23dBm,the launch power of BWP1 is 20dBm (20 dBm-10 lg (10 dBm)2) BWP2 has a transmit power of 20dBm (20 dBm-10 lg (10 dBm))2) Then the total transmit power of BWP1 and BWP2 is 23dBm (23 dBm-10 lg (10 dBm))2+102) Power headroom of the first uplink carrier is 0dBm (0dBm ═ 23dBm-23 dBm). Compared with the mode of reporting the power headroom of the BWP1 to be 3dBm and reporting the power headroom of the BWP2 to be 3dBm, the accuracy of reporting the power headroom can be improved.
As can be seen from the above, in the embodiment of the present application, the power headroom of the first uplink carrier is calculated based on the maximum transmit power supported by the first uplink carrier and the total transmit power of all activated bandwidth portions, and compared to the conventional method, the power headroom of one activated bandwidth portion is calculated based on the maximum transmit power supported by the first uplink carrier and the transmit power of one activated bandwidth portion, so that the accuracy of reporting the power headroom by the terminal device can be improved.
As shown in fig. 3, the present application provides a method flow for sending a power headroom report, in the flow shown in fig. 3, an execution main body of step S301 and step S302 may be a terminal device, or may be a device, such as a chip or a chip system, that supports the terminal device to implement the functions of step S301 and step S302, in the embodiment of the present application, the execution main body of step S301 and step S302 may be a terminal device for example, in the flow shown in fig. 3, an execution main body of step S303 and step S304 may be a network device, or may be a device, such as a chip or a chip system, that supports the network device to implement the functions of step S303 and step S304, in the embodiment of the present application, the execution main body of step S303 and step S304 is taken as a network device for example.
Step S301: the terminal equipment determines the power margin of the first activated bandwidth part according to the maximum transmitting power supported by the first uplink carrier, the transmitting power of the first activated bandwidth part and the first power sharing factor.
In this embodiment, the first uplink carrier may include N active bandwidth portions, where N is an integer greater than or equal to 2, and the first active bandwidth portion in step S301 may activate a bandwidth portion of any one of the N active bandwidth portions, where the first power sharing factor is a power sharing factor corresponding to the first active bandwidth portion.
In this embodiment of the application, the specific implementation process of step S301 may be: the terminal equipment determines the maximum transmitting power supported by a first uplink carrier, determines the transmitting power of a first activated bandwidth part and a first power sharing factor corresponding to the first activated bandwidth part, and finally determines the power margin of the first activated bandwidth part according to the maximum transmitting power supported by the first uplink carrier, the transmitting power of the first activated bandwidth part and the first power sharing factor.
In an example of the present application, a method of determining a maximum transmit power supported by a first uplink carrier may be, but is not limited to, using the method provided in fig. 4 described below.
In this embodiment, the power headroom of the first active bandwidth part may be specifically a power headroom of the first active bandwidth part when the first uplink signal is transmitted, and accordingly, the power headroom report may be a power headroom report of the first uplink signal, and how to determine the transmission power of the first active bandwidth part may be specifically discussed in the following two cases:
for the first case, if the first active bandwidth part is used for transmitting the first uplink signal, the transmit power of the first active bandwidth part is determined according to the actual transmit power of the first active bandwidth part. For the first case, the transmit power of the first active bandwidth part may also be referred to as the actual transmit power of the first active bandwidth part.
Accordingly, for the first case, determining the power headroom of the first active bandwidth portion may satisfy the following equation (18):
Figure BDA0001673446100000111
wherein the pH istype1,b,f,cRepresenting a power headroom of a first active bandwidth part, said alpha representing a first power headroomA quantity sharing factor, said PCMAX,f,cRepresents a maximum transmission power supported by a first uplink carrier, the
Figure BDA0001673446100000112
Representing an actual transmit power of the first active bandwidth portion.
For the second case, if the first active bandwidth part is not used for transmitting the first uplink signal, determining the transmission power of the first active bandwidth part according to the virtual transmission power of the first active bandwidth part. For the second case, the transmit power of the first active bandwidth part is also referred to as the virtual transmit power of the first active bandwidth part.
Accordingly, for the second case, determining the power headroom of the first active bandwidth portion may satisfy the following equation (1.9):
Figure BDA0001673446100000121
wherein the pH istype1,b,f,cRepresenting a power headroom of a first active bandwidth part, said alpha representing a first power headroom sharing factor, said
Figure BDA0001673446100000122
Represents the maximum transmission power of the first uplink carrier, the { P }O_PUSCH,b,f,c+αb,f,c·PLb,f,c+fb,f,cMeans a virtual transmit power of the first active bandwidth portion.
Step S302: the terminal device sends a power headroom report indicating the power headroom of the first active bandwidth part.
In this embodiment, the terminal device may trigger the reporting of the power headroom when any one or more of the 6 trigger conditions described in the flow illustrated in fig. 2 is satisfied, or trigger the reporting of the activated bandwidth part when the activated bandwidth part is switched.
Step S303: a network device receives a power headroom report.
Step S304: the network device determines a power headroom for the first active bandwidth portion based on the power headroom report.
It should be noted that, in the process shown in fig. 3, the first uplink carrier may include N active bandwidth portions, where N is greater than or equal to 2, a power sharing factor may be configured in advance for one active bandwidth portion of the N active bandwidth portions, and the power sharing factor of one active bandwidth portion and the power sharing factor of another active bandwidth portion may be the same or different. In this embodiment, steps S301 to S304 in the flow shown in fig. 3 may be performed once for one active bandwidth part of the N active bandwidth parts, that is, the first active bandwidth part in the flow shown in fig. 3 may be any active bandwidth part of the N active bandwidth parts.
In this embodiment, one activated bandwidth portion in the first uplink carrier may correspond to one power sharing factor, and the power sharing factor corresponding to one activated bandwidth portion may be configured in advance for the terminal device, or may indicate the correspondence relationship to the terminal device through signaling or information for the network device, which is not limited herein.
Optionally, in this embodiment of the application, the size of the power sharing factor may be related to the number of activated bandwidth portions in the first uplink carrier, for example, the larger the number of activated bandwidth portions in the first uplink carrier is, the smaller the power sharing factor may be. For example, when the entire first uplink carrier includes only one active bandwidth portion, the power sharing factor may be 1, and when the entire first uplink carrier includes two active bandwidth portions, the power sharing factor of one active bandwidth portion may be 0.5, and the power sharing factor of the other active bandwidth portion may be 0.5.
In the embodiment of the present application, still taking the above example as an example, the first uplink carrier includes two active BWPs, which are BWP1 and BWP2, and it is determined by calculation that the maximum supportable transmit power of the first uplink carrier is 23dBm, the transmit power of BWP1 is 20dBm, the transmit power of BWP2 is 20dBm, and the power sharing factor corresponding to BWP1 is set to a1, the power sharing factor corresponding to BWP2 is set to a2, and the sizes of a1 and a2 are both 0.5. Using the method in the flow shown in fig. 3, the calculated BWP1 has a margin of 1.5dBm (a1 (23dBm-20dBm) ═ 0.5 dBm 3dBm 1.5dBm), and similarly, the calculated BWP2 has a margin of 1.5 dBm. And the calculated power margin of BWP1 is 3dBm and the power margin of BWP2 is 3dBm by adopting the conventional calculation method. As can be seen from the above analysis, under the assumption that the power headroom in the first uplink carrier is actually 0, it can be seen that the accuracy of reporting the power headroom can be improved by using the flow provided in fig. 3, compared to the conventional method. Meanwhile, in the process shown in fig. 3, the terminal device reports the power headroom of one active bandwidth portion, so that the network device can more accurately know the power headroom of one active bandwidth portion of multiple active bandwidth portions in one uplink carrier.
The application also provides a power control method of the uplink signal, which is mainly used for determining the transmitting power of the uplink signal.
Specifically, in this embodiment, the terminal device may determine the transmission power of the uplink signal according to the maximum transmission power supported by the first uplink carrier and the first transmission power. The first transmit power may be determined according to a configuration parameter of higher layer signaling and indication information in DCI.
In the embodiment of the present application, the method for determining the maximum transmit power supported by the first uplink carrier may be, but is not limited to, using the method provided in fig. 4 described below.
In an example of the present application, the transmission power of the uplink signal may be a minimum value between a maximum transmission power supported by the first uplink carrier and the first transmission power.
In the embodiment of the present application, taking the uplink signal as the PUSCH as an example, how to determine the transmission power of the uplink signal is described, for example, the transmission power of the PUSCH may satisfy the following formula (1.10):
Figure BDA0001673446100000131
wherein, the PPUSCH,b,f,cRepresenting the transmit power of the PUSCH, the PCMAX,f,cRepresents a maximum transmit power supported by the first uplink carrier, the
Figure BDA0001673446100000132
For the description of the specific higher layer configuration parameter and the parameter indicated by the DCI in the first transmission power, which represents the first transmission power, see the description of the above equation (1.2).
As shown in fig. 4, the present application further provides a method for determining a maximum transmission power supported by a first uplink carrier, and the method may be specifically applied to the flows shown in fig. 2 and fig. 3, and is used to calculate the maximum transmission power supported by the first uplink carrier, and may also be used in a power control process of an uplink signal, and the application scenario of the method shown in fig. 4 is not specifically limited in the present application. In the flow shown in fig. 4, the execution subject of the method may be a terminal device, and may also be an apparatus, such as a chip or a chip system, that supports the terminal device to implement the method. In the embodiment of the present application, a specific implementation process is described by taking an execution main body of the flow shown in fig. 4 as an example of a terminal device.
Step S401: the terminal device determines a power attenuation factor.
In the embodiment of the present application, the power attenuation factor of the terminal device may be predefined through a protocol, or the network device may configure the power attenuation factor for the terminal device through dedicated Radio Resource Control (RRC) signaling or broadcast message.
In this embodiment, the first uplink carrier may include N active bandwidth portions, where N is an integer, and the power attenuation factor may be determined according to a waveform used when the N active bandwidth portions transmit uplink signals.
For example, in an example of the present application, if a first waveform is used in each of the N active portion bandwidths, the power attenuation factor may be a first power attenuation factor; if the first waveform and the second waveform are used in the N active bandwidth portions, the power attenuation factor is a second power attenuation factor; the power reduction power factor is a third power reduction factor if the second waveform is used in all of the N active bandwidth portions. And the first power attenuation factor is less than or equal to a second power attenuation factor, and the second power attenuation factor is less than or equal to a third power attenuation factor.
In an embodiment of the present application, the first waveform may be a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform, and the second waveform may be a discrete fourier transform spread-spread OFDM (DFT-s-OFDM) waveform.
Optionally, in this embodiment of the application, the first waveform and the second waveform may further include one or more of the following waveforms: filter-bank based multi-carrier waveforms (FBMC), filter-based OFDM waveforms (Filtered-OFDM), generalized frequency division multiplexing waveforms (generalized frequency division multiplexing), and universal Filtered multi-carrier waveforms (UFMC).
Step S402: and the terminal equipment determines the maximum transmitting power supported by the first uplink carrier according to the power attenuation factor.
In this embodiment of the present application, the terminal device may first determine, according to the power attenuation factor, at least one of a lower maximum transmit power limit supported by the first uplink carrier and an upper maximum transmit power limit supported by the first uplink carrier; then, the terminal device may determine the maximum transmission power supported by the first uplink carrier according to the lower limit of the maximum transmission power supported by the first uplink carrier and the upper limit of the maximum transmission power supported by the first uplink carrier. For example, the maximum transmit power supported by the first uplink carrier may be greater than or equal to a lower maximum transmit power limit supported by the first uplink carrier, and less than or equal to an upper maximum transmit power limit supported by the first uplink carrier.
In an embodiment of the present application, the maximum transmit power supported by the first uplink carrier satisfies the following formula (1.11):
PCMAX_L,f,c≤PCMAX,f,c≤PCMAX_H,f,c(ii) a Formula (1.11)
Wherein, PCMAX,f,cRepresents a maximum transmit power supported by the first uplink carrier, PCMAX_L,f,cRepresents a lower limit of a maximum transmit power supported by the first uplink carrier, the PCMAX_H,f,cAt least one of a maximum lower transmit power limit supported by the first uplink carrier and a maximum upper transmit power limit supported by the first uplink carrier is determined according to the power attenuation factor.
Example 1
The power attenuation factor is related to a lower maximum transmission power limit supported by the first uplink carrier, and the power attenuation factor is not related to an upper maximum transmission power limit supported by the first uplink carrier, that is, only the lower maximum transmission power limit supported by the first uplink carrier is determined according to the power attenuation factor:
in example one, the lower limit of the maximum transmission power supported by the first uplink carrier may satisfy the following formula (1.12) or formula (1.13):
PCMAX_L,f,c＝MIN{PEMAX,c-ΔTC,c,(PPowerClass-ΔPPowerClass)-MAX(A+MPRc+A-MPRc+ΔTIB,c+ΔTC,c,P-MPRc)}
formula (1.12)
PCMAX_L,f,c＝MIN{PEMAX,c-ΔTC,c-A,(PPowerClass-ΔPPowerClass)-MAX(A+MPRc+A-MPRc+ΔTIB,c+ΔTC,c,P-MPRc)}
Formula (1.13)
Wherein, the PCMAX_L,f,cRepresents a lower limit of a maximum transmit power supported by the first uplink carrier.
The P isEMAX,cThe maximum transmitting power of the first uplink carrier wave configured by the network equipment is represented, and the maximum transmitting power of the first uplink carrier wave configured on the c carrier wave f of the cell for the network equipment through RRC signaling or broadcast messageThe transmit power.
The Δ TC,cCurrently, in the definition, taking a certain carrier in LTE as an example, when the lowest 4MHz or the highest 4MHz of the carrier bandwidth of the transmission bandwidth of the terminal device is used, the Δ T isC,cIs a power decay of 1.5dB, otherwise Δ TC,cThe value of (c) takes zero.
The P isPowerClassRepresenting the power class of the terminal device, e.g. a maximum transmit power of 26dBm for power class 2 and a maximum transmit power of 23dBm for power class 3.
The described Δ PPowerClassIndicating the power class of the terminal device, e.g. when the power class 2 UE of the terminal device is operating in band 41, when P is configured by higher layer signallingEMAX,cΔ P at a certain value A, e.g. 26dBmPowerClassEqual to 3dB, or Δ P when the uplink and downlink configurations are 0 or 6 and the configured value is less than APowerClassEqual to 0 dB.
The MPRc represents the maximum power reduction, and is related to the channel bandwidth, the PRBs occupied by the transmission, and the modulation format.
The a-MPRc represents an additional maximum power reduction, which is specifically defined for a terminal device supporting intra-band contiguous carrier aggregation.
Δ TIB,cCurrently in the definition, a power attenuation value needs to be supported on a certain carrier for a terminal device supporting Inter-Band CA.
The P-MPRC represents a power management maximum power reduction value.
The a is a power attenuation factor, the power attenuation factor is related to the number of BWPs where the first uplink signal is transmitted and the uplink transmission waveform of the BWPs, or the power attenuation factor is determined according to the number of BWPs where the first uplink signal is transmitted and/or the waveform of the first uplink signal transmitted on a BWP, or the power attenuation factor is determined according to at least one of the number of BWPs where the first uplink signal is transmitted, the waveform of the first uplink signal transmitted on a BWP, and the modulation format used by the first uplink signal.
By way of example, in the embodiments of the present application,for example, the first uplink carrier f includes two active BWPs, and if the number of BWPs actually transmitted is 1, P is the number of BWPs actually transmittedCMAX,f,cThe calculation of (A) can be found in the existing calculation mode, namely the value of A is considered to be 0; assuming that the actual transmission BWP number of the first uplink signal is 2 and both BWPs have CP-OFDM waveforms, P isCMAX,f,cThe power fading factor additionally introduced in the calculation may be a1 (for example, a1 may take a value of 0); if the waveform on 1 BWP of two BWPs is CP-OFDM waveform and the waveform on the other BWP is DFT-s-OFDM waveform, then PCMAX,f,cThe power fading factor additionally introduced in the calculation can be a2 (for example, a2 can be 0.5 dB); if the waveforms on both BWPs are DFT-s-OFDM waveforms, then PCMAX,f,cThe power fading factor additionally introduced in the calculation is A3 (for example, A3 may be 1dB or more);
alternatively, A1 may be less than or equal to A2, A2 may be less than or equal to A3, i.e. the more the number of upstream BWPs whose actual transmission waveform is DFT-s-OFDM, the larger the power attenuation factor A is introduced, the calculated P isCMAX,f,cThe smaller; the more the uplink BWP (broadband remote Access Point) of the CP-OFDM waveform which is actually transmitted, the smaller the introduced power attenuation factor A is, and the calculated P isCMAX,f,cThe larger.
Optionally, when two BWPs use one Modulation format, for example, the Modulation format may be Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM), a1 may be less than or equal to a2, and a2 may be less than or equal to A3, that is, the larger the number of uplink BWPs with DFT-s-OFDM as the actual transmission waveform, the larger the power attenuation factor a is introduced, the larger the calculated P isCMAX,f,cThe smaller; the more the uplink BWP (broadband remote Access Point) of the CP-OFDM waveform which is actually transmitted, the smaller the introduced power attenuation factor A is, and the calculated P isCMAX,f,cThe larger.
Optionally, when two BWPs use waveform combination of a certain format, for example, one BWP uses CP-OFDM waveform and one BWP uses DFT-s-OFDM; or both BWPs use CP-OFDM or DFT-s-OFDM waveforms, the higher the modulation order of the first uplink signal is, the larger the value of the power attenuation factor A is, the calculated P isCMAX,f,cThe smaller. WhereinThe modulation format of the first uplink signal is gradually higher from QPSK, 16QAM, 64QAM to 256 QAM.
In an example one, the maximum transmit power supported by the first uplink carrier may satisfy the following equation (1.14):
PCMAX_H,f,c＝MIN{PEMAX,c,PPowerClass-ΔPPowerClass}; formula (1.14)
Wherein, the PCMAX_H,f,cRepresents an upper limit of a maximum transmit power supported by the first uplink carrier, the PEMAX,cThe maximum transmitting power of the terminal equipment configured by the network equipment on the first uplink carrier is represented, and the P isPowerClassAnd Δ PPowerClassRepresenting the power class of the terminal device.
Example two
The power attenuation factor is related to the maximum upper limit of the transmission power supported by the first uplink carrier, and the power attenuation factor is not related to the maximum lower limit of the transmission power supported by the first uplink carrier, that is, only the maximum upper limit of the transmission power supported by the first uplink carrier is determined according to the power attenuation factor.
In example two, the maximum transmit power supported by the first uplink carrier may satisfy the following formula (1.15) or formula (1.16):
PCMAX_H,f,c＝MIN{PEMAX,c,PPowerClass-ΔPPowerClass-A}
formula (1.15)
PCMAX_H,f,c＝MIN{PEMAX,c-A,PPowerClass-ΔPPowerClass}
Formula (1.16)
Wherein, the PCMAX_H,f,cRepresents an upper limit of a maximum transmit power supported by the first uplink carrier, the PPowerClassAnd Δ PPowerClassRepresents the power level of the terminal device, and A represents the power attenuation factor of the terminal device.
In example two, the lower limit of the maximum transmission power supported by the first uplink carrier may satisfy the following formula (1.17):
PCMAX_L,f,c＝MIN{PEMAX,c-ΔTC,c,(PPowerClass-ΔPPowerClass)-MAX(MPRc+A-MPRc+ΔTIB,c+ΔTC,c,P-MPRc)}
equation (1.17)
Wherein, the PCMAX_L,f,cRepresents a lower limit of a maximum transmit power supported by the first uplink carrier.
The P isEMAX,cThe maximum transmission power on the first uplink carrier configured by the network device is represented, and is configured on the cell c carrier f by the network device through RRC signaling.
The Δ TC,cCurrently, in the definition, taking a certain carrier in LTE as an example, when the lowest 4MHz or the highest 4MHz of the carrier bandwidth of the transmission bandwidth of the terminal device is used, the Δ T isC,cIs a power decay of 1.5dB, otherwise Δ TC,cThe value of (c) takes zero.
The P isPowerClassRepresenting the power class of the terminal device, e.g. a maximum transmit power of 26dBm for power class 2 and a maximum transmit power of 23dBm for power class 3.
The described Δ PPowerClassIndicating the power class of the terminal device, e.g. when the power class 2 UE of the terminal device is operating in band 41, when P is configured by higher layer signallingEMAX,cΔ P at a certain value A, e.g. 26dBmPowerClassEqual to 3dB, or Δ P when the uplink and downlink configurations are 0 or 6 and the configured value is less than APowerClassEqual to 0 dB.
The MPRc represents the maximum power reduction, and is related to the channel bandwidth, the PRBs occupied by the transmission, and the modulation format.
The a-MPRc represents an additional maximum power reduction, which is specifically defined for a terminal device supporting intra-band contiguous carrier aggregation.
Δ TIB,cCurrently in the definition, a power attenuation value needs to be supported on a certain carrier for a terminal device supporting Inter-Band CA.
The P-MPRC represents a power management maximum power reduction value.
Example three
The power attenuation factor is related to both an upper limit of maximum transmission power supported by the first uplink carrier and a lower limit of maximum transmission power supported by the first uplink carrier, that is, both the upper limit of maximum transmission power supported by the first uplink carrier and the lower limit of maximum transmission power supported by the first uplink carrier are determined according to the power attenuation factor.
In example three, the upper limit of the maximum transmission power supported by the first uplink carrier may satisfy the above equation (1.15) or equation (1.16), and the lower limit of the maximum transmission power supported by the first uplink carrier may satisfy the above equation (1.12) or equation (1.13).
It should be further noted that, in the embodiment of the present application, the power attenuation factor is determined according to the number of BWPs occupied by the first upstream signal transmission and/or the waveform transmitted by the first upstream signal on BWP; or the power attenuation factor is determined according to the number of BWPs occupied by the transmission of the first uplink signal and/or the waveform of the first uplink signal transmitted on one BWP, and in this application, the name of the power attenuation factor is not limited, and the power attenuation factor may also be referred to as a waveform-dependent power attenuation factor, or MRPb, etc.
As shown in fig. 5, the present application provides a method flow for sending a power headroom report, in the flow shown in fig. 5, an execution main body of step S501 and step S502 may be a terminal device, or may be a device, such as a chip or a chip system, that supports the terminal device to implement the functions of step S501 and step S502, in the embodiment of the present application, an execution main body of step S501 and step S502 may be a terminal device for example, in the flow shown in fig. 5, an execution main body of step S503 and step S504 may be a network device, or may be a device, such as a chip or a chip system, that supports the network device to implement the functions of step S503 and step S504, in the embodiment of the present application, an execution main body of step S503 and step S504 is a network device for example.
Step S501: the terminal equipment determines the power margin of the first active bandwidth part according to the maximum transmission power supported by the first active bandwidth part and the transmission power of the first active bandwidth part.
In this embodiment of the present application, the specific implementation process of the step S501 may be: the terminal device determines a maximum transmit power supported by the first active bandwidth portion and a transmit power of the first active bandwidth portion, and determines a power margin of the first active bandwidth portion based on the maximum transmit power supported by the first active bandwidth portion and the transmit power of the first active bandwidth portion, for example, the power margin of the first active bandwidth portion may be equal to a difference between the maximum transmit power supported by the first active bandwidth portion and the transmit power of the first active bandwidth portion.
In an embodiment of the present application, the maximum transmit power supported by the first active bandwidth part may be determined according to a maximum transmit power pre-configured to the first active bandwidth part.
For example, in an example of the present application, the maximum transmit power of the first active bandwidth part may be equal to the preconfigured maximum transmit power of the first active bandwidth part.
For another example, in another example of the present application, the maximum transmit power of the first active bandwidth part may be greater than or equal to a lower maximum transmit power limit of the first active bandwidth part and less than or equal to an upper maximum transmit power limit of the first active bandwidth part, and the lower maximum transmit power limit of the first active bandwidth part and/or the upper maximum transmit power limit of the first active bandwidth part may be determined according to a maximum transmit power pre-configured for the first active bandwidth part.
In this embodiment of the application, the power headroom of the first active bandwidth part may specifically be a power headroom when the first active bandwidth part transmits the first uplink signal, and accordingly, the power headroom report is a power headroom report of the first uplink signal, and the transmission power of the first active bandwidth part may be divided into the following two cases:
in the first case: and if the first active bandwidth part is used for transmitting the first uplink signal, determining the transmission power of the first active bandwidth part according to the actual transmission power of the first active bandwidth part. For the first case, the transmit power of the first active bandwidth part may also be referred to as the actual transmit power of the first active bandwidth part.
For the first case, the power headroom of the first active bandwidth portion may satisfy the following equation (1.18):
Figure BDA0001673446100000171
wherein the pH istype1,b,f,cRepresenting a power headroom of the first active bandwidth part, PCMAX,b,f,cRepresents a maximum transmit power of the first active bandwidth portion, the
Figure BDA0001673446100000172
Representing an actual transmit power of the first active bandwidth portion.
In the second case: and if the first active bandwidth part is not used for transmitting the first uplink signal, determining the transmitting power of the first active bandwidth part according to the virtual transmitting power of the first active bandwidth part. For the second case, the transmit power of the first active bandwidth portion may also be referred to as the virtual transmit power of the first active bandwidth portion.
For the second case, the power headroom of the first active bandwidth portion may satisfy the following equation (1.19):
Figure BDA0001673446100000181
wherein the pH istype1，b，f，cA power headroom representing the first active bandwidth portion, the
Figure BDA0001673446100000182
Represents a maximum transmit power of the first active bandwidth part, the { P }O_PUSCH,b,f,c+αb,f,c·PLb,f,c+fb,f,cMeans forA virtual transmit power of the first active bandwidth part.
Step S502: the terminal device sends a power headroom report indicating the power headroom of the first active bandwidth part.
In this embodiment, the terminal device may trigger the reporting of the power headroom when any one or more of the 6 trigger conditions described in the flow illustrated in fig. 2 is satisfied, or trigger the reporting of the activated bandwidth part when the activated bandwidth part is switched.
Step S503: a network device receives a power headroom report.
Step S504: the network device determines a power headroom of the first active bandwidth portion based on the power headroom report.
In this embodiment of the present application, since the terminal device may independently report the power headroom for one active bandwidth part, the network device may obtain the power headroom of one active bandwidth part, so that the network device may accurately schedule uplink data for the terminal device.
In the foregoing embodiment of the present application, the method provided in the embodiment of the present application is introduced from the perspective of interaction between a network device and a terminal device. In order to implement the functions in the method provided by the embodiment of the present application, the network device and the terminal device may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.
Similar to the above concept, as shown in fig. 6, the present application further provides an apparatus 600, where the apparatus 600 may be a terminal device, and may also be an apparatus capable of supporting the terminal device to implement the function of the terminal device in the method related to fig. 2, fig. 3, or fig. 5. Illustratively, the apparatus may be an apparatus (e.g., a chip or a system of chips) in a terminal device. It should be noted that, in the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The apparatus 600 may comprise a processing unit 601 and a transceiving unit 602;
for the apparatus 600 described above, the present application provides the following three examples:
the first example: a processing unit 601, configured to determine a power headroom of a first uplink carrier according to a maximum transmit power supported by the first uplink carrier and a total transmit power of N active bandwidth portions, where the first uplink carrier includes the N active bandwidth portions, and N is an integer greater than or equal to 2; a transceiver unit 602, configured to send a power headroom report, where the power headroom report is used to indicate a power headroom of the first uplink carrier.
In a first example, specifically, the maximum transmit power supported by the first uplink carrier is determined according to a power attenuation factor, where the power attenuation factor is determined according to a waveform used when the uplink signal is transmitted in the N active bandwidth portions, and if a cyclic prefix orthogonal frequency division multiplexing CP-OFDM waveform is used in all of the N active bandwidth portions, the power attenuation factor is a first power attenuation factor; if the CP-OFDM waveform and the orthogonal frequency division multiplexing DFT-s-OFDM waveform expanded by discrete Fourier transform are used in the N active part bandwidths, the power attenuation factor is a second power attenuation factor; the power reduction power factor is a third power reduction factor if the DFT-s-OFDM waveform is used for all of the N active portion bandwidths. The first power attenuation factor is smaller than or equal to the second power attenuation factor, and the second power attenuation factor is smaller than or equal to the third power attenuation factor.
In a first example, the maximum transmit power supported by the first uplink carrier satisfies the following condition:
PCMAX_L,f,c≤PCMAX,f,c≤PCMAX_H,f,c；
wherein, PCMAX,f,cRepresents a maximum transmit power supported by the first uplink carrier, PCMAX_L,f,cRepresents a lower limit of a maximum transmit power supported by the first uplink carrier, the PCMAX_H,f,cAt least one of an upper limit of maximum transmission power supported by the first uplink carrier, a lower limit of maximum transmission power supported by the first uplink carrier, and an upper limit of maximum transmission power supported by the first uplink carrier is determined according to the power attenuation factor
In a first example, the power headroom report may be a power headroom report of a first uplink signal, and the processing unit 601 is further configured to determine a total transmit power of the N active bandwidth parts according to an actual transmit power of at least one target active bandwidth part of the N active bandwidth parts if the target active bandwidth part is used for transmitting the first uplink signal. The processing unit 601 is further configured to determine, if none of the N active bandwidth parts is used for transmitting the first uplink signal, a total transmit power of the N active bandwidth parts according to the virtual transmit powers of the N active bandwidth parts.
The second example is: a processing unit 601, configured to determine a power headroom of a first active bandwidth portion according to a maximum transmit power supported by a first uplink carrier, a transmit power of the first active bandwidth portion, and a first power sharing factor, where the first uplink carrier includes the first active bandwidth portion, and the first power sharing factor is a power sharing factor corresponding to the first active bandwidth portion; a transceiving unit 602, configured to send a power headroom report, where the power headroom report is used to indicate a power headroom of the first active bandwidth portion.
For the second example, specifically: the first uplink carrier comprises N active bandwidth parts, the first active bandwidth part is one of the N active bandwidth parts, and N is an integer greater than or equal to 2; the maximum transmission power supported by the first uplink carrier is determined according to a power attenuation factor, the power attenuation factor is determined according to waveforms used when uplink signals are transmitted in the N active bandwidth parts, and if cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveforms are used in all the N active bandwidth parts, the power attenuation factor is a first power attenuation factor; if the CP-OFDM waveform and the orthogonal frequency division multiplexing DFT-s-OFDM waveform expanded by discrete Fourier transform are used in the N active part bandwidths, the power attenuation factor is a second power attenuation factor; the power reduction power factor is a third power reduction factor if the DFT-s-OFDM waveform is used for all of the N active portion bandwidths. The first power attenuation factor is smaller than or equal to the second power attenuation factor, and the second power attenuation factor is smaller than or equal to the third power attenuation factor.
For the second example, the maximum transmit power supported by the first uplink carrier may satisfy the following condition:
PCMAX_L,f,c≤PCMAX,f,c≤PCMAX_H,f,c；
wherein, PCMAX,f,cRepresents a maximum transmit power supported by the first uplink carrier, PCMAX_L,f,cRepresents a lower limit of a maximum transmit power supported by the first uplink carrier, the PCMAX_H,f,cAt least one of a maximum lower transmit power limit supported by the first uplink carrier and a maximum upper transmit power limit supported by the first uplink carrier is determined according to the power attenuation factor.
The third example: a processing unit 601, configured to determine a power headroom of a first active bandwidth part according to a maximum transmit power supported by the first active bandwidth part and a transmit power of the first active bandwidth part; a transceiving unit 602, configured to send a power headroom report, where the power headroom report is used to indicate a power headroom of the first active bandwidth portion.
For the third example, in particular, the maximum transmit power supported by the first active bandwidth part is determined according to a maximum transmit power pre-configured for the first active bandwidth part.
For the third example, optionally, the maximum transmit power supported by the first active bandwidth portion is greater than or equal to a lower maximum transmit power limit supported by the first active bandwidth portion, and the maximum transmit power supported by the first active bandwidth portion is less than or equal to an upper maximum transmit power limit supported by the first active bandwidth portion; at least one of a lower maximum transmit power limit supported by the first active bandwidth portion and an upper maximum transmit power limit supported by the first active bandwidth portion is determined based on a maximum transmit power pre-configured for the first active bandwidth portion.
For the descriptions of the first example, the second example, and the third example, refer to the descriptions of fig. 2, fig. 3, and fig. 5, respectively, and are not repeated here.
Based on the same concept, as shown in fig. 7, the present application further provides an apparatus 700, where the apparatus 700 may be a terminal device, and may also be an apparatus capable of supporting the terminal device to implement the functions of the terminal device related to fig. 2, fig. 3, or fig. 5. Illustratively, the apparatus 700 may be an apparatus (e.g., a chip or a system of chips) within a terminal device. It should be noted that, in the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.
The apparatus 700 may include at least one processor 701 configured to implement the functions of the terminal device in the transmission power headroom report provided in fig. 2, fig. 3, or fig. 5.
The apparatus 700 may also include at least one memory 702 for storing program instructions and/or data. A memory 702 is coupled to the processor 701. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 701 may cooperate with the memory 702. The processor 701 may execute program instructions stored in the memory 702. At least one of the at least one memory 702 may be included in the processor 701.
The apparatus 700 may further include a communication interface 703, and the apparatus 700 may perform information interaction with other devices through the communication interface 703. Communication interface 703 may be a circuit, bus, transceiver, or any other device that may be used to facilitate the exchange of information. Wherein the other device may be, illustratively, other terminal device or network device. Processor 701 may send and receive data using communication interface 703, communication interface 703 illustratively being used to send power headroom reports.
In the embodiment of the present application, a specific connection medium among the communication interface 703, the processor 701, and the memory 702 is not limited. In the embodiment of the present application, the memory 702, the processor 701, and the communication interface 703 are connected by a bus in fig. 7, the bus is represented by a thick line in fig. 7, and the connection manner between other components is merely schematic and is not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus.
In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.
In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory, for example, a random-access memory (RAM). The memory can also be, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.
Fig. 8 provides a schematic structural diagram of a terminal device. The terminal device may correspond to the terminal devices shown in fig. 2, 3 and 5. For convenience of explanation, fig. 8 shows only main components of the terminal device. As shown in fig. 8, the terminal apparatus 800 may include a processor, a memory, a control circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the whole user equipment, executing software programs and processing the number of the software programs. The memory is mainly used for storing software programs and data, for example, the codebook described in the above embodiments. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit and the antenna together, which may also be called a transceiver, are mainly used for transceiving radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.
In the embodiment of the present application, the processor may read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor outputs a baseband signal to the radio frequency circuit after performing baseband processing on the data to be sent, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to user equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.
Those skilled in the art will appreciate that fig. 8 shows only one memory and processor for ease of illustration. In an actual user equipment, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this respect in the embodiment of the present invention.
As an alternative implementation, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process the communication protocol and the communication data, and the central processing unit is mainly used to control the whole user equipment, execute a software program, and process data of the software program. The processor in fig. 8 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the user equipment may include multiple baseband processors to accommodate different network formats, multiple central processors to enhance its processing capability, and various components of the user equipment may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
For example, in the embodiment of the present invention, the antenna and the control circuit having the transceiving function may be regarded as the transceiving unit 801 of the terminal device 800, and the processor having the processing function may be regarded as the processing unit 802 of the terminal device 800. As shown in fig. 8, the terminal device 800 may include a transceiving unit 801 and a processing unit 802. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. Alternatively, a device for implementing a receiving function in the transceiver unit 801 may be regarded as a receiving unit, and a device for implementing a sending function in the transceiver unit 801 may be regarded as a sending unit, that is, the transceiver unit 801 includes a receiving unit and a sending unit, the receiving unit may also be referred to as a receiver, a receiving circuit, and the like, and the sending unit may be referred to as a transmitter, a sending circuit, and the like.
According to the method provided by the embodiment of the present application, an embodiment of the present invention further provides a communication system, which includes the terminal device and the network device.
Based on the above embodiments, the present application further provides a computer storage medium, in which a software program is stored, and the software program can implement the method provided by any one or more of the above embodiments when being read and executed by one or more processors. The computer storage medium may include: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.
Based on the above embodiments, the present application further provides a chip, where the chip includes a processor, and is configured to implement the functions related to any one or more of the above embodiments, such as obtaining or processing information or messages related to the above methods. Optionally, the chip further comprises a memory for the processor to execute the necessary program instructions and data. The chip may be constituted by a chip, or may include a chip and other discrete devices.
It should be understood that in embodiments of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may include both read-only memory and random access memory, and provides instructions and data to the processor. The portion of memory may also include non-volatile random access memory.
The bus system may include a power bus, a control bus, a status signal bus, and the like, in addition to the data bus. For clarity of illustration, however, the various buses are labeled as a bus system in the figures.
In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.
In the embodiment of the device of the present application, the module division of the device is a logic function division, and there may be another division manner in actual implementation. For example, each functional module of the apparatus may be integrated into one module, each functional module may exist alone, or two or more functional modules may be integrated into one module.
The method provided by the embodiment of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a terminal, or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium (e.g., SSD), among others.
The above embodiments are only used to illustrate the technical solutions of the present application, and are not used to limit the protection scope thereof. All modifications, equivalents, improvements and the like based on the technical solutions of the present application should be included in the protection scope of the present application.

Claims (7)

1. A method of transmitting a power headroom report, comprising:
determining a power headroom of a first uplink carrier according to a maximum transmission power supported by the first uplink carrier and a total transmission power of N activated bandwidth parts, wherein the first uplink carrier comprises the N activated bandwidth parts, and N is an integer greater than or equal to 2;
transmitting a power headroom report for indicating a power headroom of the first uplink carrier;
the maximum transmit power supported by the first uplink carrier is determined according to a power attenuation factor determined according to a waveform used when the N active bandwidth portions transmit uplink signals;
the power attenuation factor is determined according to a waveform used when the N active bandwidth portions transmit uplink signals, and specifically includes:
if a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform is used in the N active part bandwidths, the power attenuation factor is a first power attenuation factor;
if the CP-OFDM waveform and the orthogonal frequency division multiplexing DFT-s-OFDM waveform expanded by discrete Fourier transform are used in the N active bandwidth parts, the power attenuation factor is a second power attenuation factor;
the power reduction power factor is a third power reduction factor if the DFT-s-OFDM waveform is used for all of the N active bandwidth portions.
2. The method of claim 1, wherein the first power attenuation factor is equal to or less than the second power attenuation factor, and wherein the second power attenuation factor is equal to or less than the third power attenuation factor.
3. The method according to claim 1 or 2, wherein the maximum transmission power supported by the first uplink carrier satisfies the following condition:
PCMAX_L,f,c≤PCMAX,f,c≤PCMAX_H,f,c；
wherein, PCMAX,f,cRepresents a maximum transmit power supported by the first uplink carrier, PCMAX_L,f,cRepresents a lower limit of a maximum transmit power supported by the first uplink carrier, the PCMAX_H,f,cAt least one of a maximum lower transmit power limit supported by the first uplink carrier and a maximum upper transmit power limit supported by the first uplink carrier is determined according to the power attenuation factor.
4. The method according to claim 1 or 2, wherein the power headroom report is a power headroom report of a first uplink signal, and the method further comprises:
and if at least one target active bandwidth part in the N active bandwidth parts is used for transmitting a first uplink signal, determining the total transmission power of the N active bandwidth parts according to the actual transmission power of the target active bandwidth part.
5. The method according to claim 1 or 2, wherein the power headroom report is a power headroom report of a first uplink signal, and the method further comprises:
and if the N active bandwidth parts are not used for transmitting the first uplink signal, determining the total transmitting power of the N active bandwidth parts according to the virtual transmitting power of the N active bandwidth parts.
6. An apparatus for transmitting a power headroom report comprising a processor, a memory, and a communication interface;
wherein the memory is to store program instructions;
the processor is used for calling and executing the program instructions stored in the memory, receiving and/or sending data through the communication interface and realizing the method of any one of claims 1 to 5.
7. A computer-readable storage medium having stored therein instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 5.
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