Uplink power control method and device

Abstract

The embodiment of the present application provides an uplink power control method and device, which relates to the field of communication technology, and can control the uplink transmission power of a terminal device to prevent the terminal device from interfering with other devices. The specific scheme includes: the terminal device can obtain a first power parameter, and determine a first transmission power according to the first power parameter, and the first power parameter includes at least one of the following: power offset, path loss compensation factor. After that, the terminal device can use the first transmission power to send a first uplink transmission.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electronic equipment, and in particular to an uplink power control method and device. Background Art

[0002] In the TD-LTE communication system, the uplink power control method can be divided into two methods: closed-loop power control and power control. Closed-loop power control means that the user equipment (UE) decides to increase or decrease the transmission signal power based on the link quality feedback from the base station. Power control means that the UE determines the transmission signal power based on the fading of the received signal.

[0003] The uplink channels include the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH), the physical uplink control channel (Physical Uplink Control Channel, PUSCH), the physical random access channel (Physical Random Access Channel, PRACH), and the uplink signals include the sounding reference signal (SRS), etc. As for the power control method, the power control methods of the above four uplink channels / signals have the same principle. The UE can determine the path loss that needs to be compensated through the path loss compensation factor α and the estimated value of the downlink path loss between the base station and the UE, thereby enabling the UE to increase the transmission power, thereby ensuring the reliability of the base station reception.

[0004] However, when multiple transmission points (eg, multiple base stations) cooperate to serve one terminal device, the transmission power of the terminal device determined based on single-station measurements may cause serious interference between users. Summary of the invention

[0005] The embodiment of the present application provides an uplink power control method, which can control the uplink transmission power of a terminal device and reduce the interference to other terminal devices.

[0006] In a first aspect, an embodiment of the present application provides a method for uplink power control.

[0007] The terminal device obtains a first power parameter and determines a first transmit power according to the first power parameter, wherein the first power parameter includes at least one of the following: a power offset and a path loss compensation factor. Afterwards, the terminal device may send a first uplink transmission using the first transmit power.

[0008] Based on the above technical solution, after obtaining the first power parameter (power offset and path loss compensation factor), the terminal device can determine the first transmit power according to the power offset and the path loss compensation factor to ensure that the first transmit power is not too large. Therefore, in the technical solution of the present application, when the terminal device uses the first transmit power to send the first uplink transmission, the interference to other terminal devices is reduced.

[0009] In combination with the first aspect, in a possible design method, the above-mentioned "terminal device can obtain a first power parameter" method includes: the terminal device can receive first indication information, and the first indication information is used to indicate the first power parameter.

[0010] In this way, the terminal device can obtain the first power parameter according to the first indication information.

[0011] In combination with the first aspect, in another possible design, the method further includes: the terminal device may obtain first information, where the first information is used to indicate a mapping relationship between the first indication information and the second power parameter. Afterwards, the terminal device may obtain a media access control unit, where the media access control unit is used to indicate a mapping relationship between the first indication information and the first power parameter.

[0012] It can be understood that, since the first information is used to indicate the mapping relationship between the first indication information and the second power parameter. Therefore, after the terminal device obtains the first information, the terminal device saves the mapping relationship between the first indication information and the second power parameter. And since the media access control unit is used to indicate the mapping relationship between the first indication information and the first power parameter. Therefore, when the terminal device obtains the media access control unit, the terminal device saves the mapping relationship between the first indication information and the first power parameter. In this way, when the terminal device obtains the first indication information, the first power parameter can be obtained according to the first indication information.

[0013] In combination with the first aspect, in another possible design manner, the method also includes: the terminal device can obtain second information, and the second information is used to enable the terminal device to update the power parameters.

[0014] It is understandable that the terminal device acquires the second information to enable the terminal device to update the power parameter. That is, when the second power parameter is stored in the terminal device, the terminal device acquires the second information to enable the terminal device to update the second power parameter to the first power parameter. In this way, after the terminal acquires the media access control unit, the terminal device can update the correspondence between the first indication information and the power parameter.

[0015] In combination with the first aspect, in another possible design, the method also includes: the terminal device sends a second uplink transmission and / or a third uplink transmission.

[0016] In combination with the first aspect, in another possible design, the method further includes: the terminal device can obtain a first path loss reference signal and a second path loss reference signal. The second uplink transmission includes a first power headroom report determined according to the first path loss reference signal, and the third uplink transmission includes a second power headroom report determined according to the second path loss reference signal.

[0017] In a second aspect, an embodiment of the present application provides a method for uplink power control.

[0018] The network device may send a first power parameter to the terminal device, the first power parameter including at least one of the following: a power offset, a path loss compensation factor. Afterwards, the network device receives a first uplink transmission, the transmission power of the first uplink transmission being determined according to the first power parameter.

[0019] In combination with the second aspect, in a possible design method, the above-mentioned "network device can send a first power parameter to a terminal device" method includes: the network device can send a first indication information to the terminal device, and the first indication information is used to indicate the first power parameter.

[0020] In combination with the second aspect, in another possible design, the method further includes: the network device may send first information to the terminal device, where the first information is used to indicate a mapping relationship between the first indication information and the second power parameter. Afterwards, the network device sends a media access control unit to the terminal device, where the media access control unit is used to indicate a mapping relationship between the first indication information and the first power parameter.

[0021] In combination with the second aspect, in another possible design, the method also includes: the network device sends second information, and the second information is used to enable the terminal device to update the power parameters.

[0022] In conjunction with the second aspect, in another possible design, the method further includes: the network device receives a second uplink transmission, and obtains one or more measurement values ​​of the second uplink transmission;

[0023] The network device determines the first power parameter according to one or more measured values ​​of the second uplink transmission.

[0024] It should be noted that when the network device receives the second uplink transmission sent by the terminal device, it can obtain the measurement value of the second uplink transmission (for example, the first measurement value A). At the same time, when the second uplink transmission sent by the terminal device is received by other network devices, the other network devices can also obtain the measurement value of the second uplink transmission (for example, the first measurement value B) and send the measurement value of the second uplink transmission to the network device. In this way, the network device can obtain the first measurement value A and the first measurement value B.

[0025] The first measurement value A is the same as the first measurement value B, or the first measurement value A is different from the first measurement value B.

[0026] In combination with the second aspect, in another possible design, the method also includes: the network device can obtain the measured value of the second uplink transmission and the measured value of the third uplink transmission, and determine the first power parameter based on the measured value of the second uplink transmission and the measured value of the third uplink transmission; or, the network device obtains the transmit power of the second uplink transmission and the transmit power of the third uplink transmission, and determines the first power parameter based on the transmit power of the second uplink transmission and the transmit power of the third uplink transmission; or, the network device obtains the first uplink path loss corresponding to the second uplink transmission and the second uplink path loss corresponding to the third uplink transmission, and determines the first power parameter based on the first uplink path loss and the second uplink path loss.

[0027] In this way, the network device can determine the first power parameter through different uplink transmission measurement values.

[0028] In combination with the second aspect, in another possible design, the measurement value of the uplink transmission is the uplink shared channel received power; or, the measurement value of the uplink transmission is the demodulation reference signal received power.

[0029] In combination with the second aspect, in another possible design, the method also includes: the network device can send a first path loss reference signal and a second path loss reference signal.

[0030] In addition, the technical effects of the uplink power control method described in the second aspect can refer to the technical effects of the uplink power control method described in the first aspect, and will not be repeated here.

[0031] In a third aspect, a terminal device is provided. The terminal device includes: an acquisition unit, a determination unit, and a sending unit. The acquisition unit is used to acquire a first power parameter, and the first power parameter includes at least one of the following: a power offset and a path loss compensation factor. The determination unit determines a first transmit power according to the first power parameter. The sending unit is used to send a first uplink transmission using the first transmit power.

[0032] In combination with the third aspect, in another possible design method, the acquisition unit is specifically used to receive first indication information, where the first indication information is used to indicate a first power parameter; obtain first information, where the first information is used to indicate a mapping relationship between the first indication information and the second power parameter; and obtain a media access control unit, where the media access control unit is used to indicate a mapping relationship between the first indication information and the first power parameter.

[0033] In combination with the third aspect, in another possible design method, the acquisition unit is also used to obtain second information, and the second information is used to enable the terminal device to update the power parameters.

[0034] In combination with the third aspect, in another possible design, the sending unit is also used to send a second uplink transmission and / or a third uplink transmission.

[0035] In combination with the third aspect, in another possible design method, the acquisition unit is also used to obtain a first path loss reference signal and a second path loss reference signal; wherein the second uplink transmission includes a first power headroom report determined based on the first path loss reference signal, and the third uplink transmission includes a second power headroom report determined based on the second path loss reference signal.

[0036] In conjunction with the third aspect, in another possible design, the terminal device may further include a storage unit storing a program or instruction. When the processing unit executes the program or instruction, the terminal device described in the third aspect may execute the uplink power control method described in the first aspect.

[0037] In addition, the technical effects of the terminal device described in the third aspect can refer to the technical effects of the uplink power control method described in the first aspect, and will not be repeated here.

[0038] In a fourth aspect, a network device is provided. The network device includes a sending unit and a receiving unit. The sending unit is used to send a first power parameter to a terminal device, and the first power parameter includes at least one of the following: a power offset and a path loss compensation factor. The receiving unit is used to receive a first uplink transmission, and the transmission power of the first uplink transmission is determined according to the first power parameter.

[0039] In combination with the fourth aspect, in another possible design method, the sending unit is specifically used to send first indication information to the terminal device, where the first indication information is used to indicate a first power parameter; send first information to the terminal device, where the first information is used to indicate a mapping relationship between the first indication information and the second power parameter; send a media access control unit to the terminal device, where the media access control unit is used to indicate a mapping relationship between the first indication information and the first power parameter.

[0040] In combination with the fourth aspect, in another possible design method, the sending unit is also used to send second information, and the second information is used to enable the terminal device to update the power parameters.

[0041] In conjunction with the fourth aspect, in another possible design, the network device further includes a determining unit. The receiving unit is further configured to receive a second uplink transmission and obtain one or more measurement values ​​of the second uplink transmission. The determining unit is configured to determine the first power parameter based on the one or more measurement values ​​of the second uplink transmission.

[0042] In combination with the fourth aspect, in another possible design method, the receiving unit is also used to obtain the measured value of the second uplink transmission and the measured value of the third uplink transmission. The determination unit is also used to determine the first power parameter based on the measured value of the second uplink transmission and the measured value of the third uplink transmission. The receiving unit is also used to obtain the transmit power of the second uplink transmission and the transmit power of the third uplink transmission. The determination unit is also used to determine the first power parameter based on the transmit power of the second uplink transmission and the transmit power of the third uplink transmission. The receiving unit is also used to obtain the first uplink path loss corresponding to the second uplink transmission and the second uplink path loss corresponding to the third uplink transmission. The determination unit is also used to determine the first power parameter based on the first uplink path loss and the second uplink path loss.

[0043] In combination with the fourth aspect, in another possible design, the measurement value of the uplink transmission is the uplink shared channel received power; or, the measurement value of the uplink transmission is the demodulation reference signal received power.

[0044] In combination with the fourth aspect, in another possible design, the sending unit is further used to send a first path loss reference signal and a second path loss reference signal.

[0045] In conjunction with the fourth aspect, in another possible design, the network device may further include a storage unit storing a program or instruction. When the processing unit executes the program or instruction, the terminal device described in the fourth aspect may execute the uplink power control method described in the first aspect.

[0046] In addition, the technical effects of the network device described in the fourth aspect can refer to the technical effects of the uplink power control method described in the second aspect, and will not be repeated here.

[0047] In a fifth aspect, an uplink power control device is provided. The uplink power control device comprises: a processor, the processor is coupled to a memory, and the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory, so that the uplink power control device performs the uplink power control method as described in any possible implementation of the first aspect or the second aspect.

[0048] In a possible design, the uplink power control device described in the sixth aspect may also include a transceiver. The transceiver may be a transceiver circuit or an input / output port. The transceiver may be used for the uplink power control device to communicate with other uplink power control devices.

[0049] In the present application, the uplink power control device described in the fifth aspect may be a terminal device or a network device, or a chip (system) or other parts or components arranged inside the terminal device or the network device.

[0050] In addition, the technical effect of the uplink power control device described in the fifth aspect can refer to the technical effect of the uplink power control method described in any one of the implementation methods in the first aspect or the second aspect, and will not be repeated here.

[0051] In a sixth aspect, a computer-readable storage medium is provided, comprising: a computer program or instructions; when the computer program or instructions are executed on a computer, the computer executes the uplink power control method described in any possible implementation of the first aspect or the second aspect.

[0052] In a seventh aspect, a computer program product is provided, comprising a computer program or instructions, which, when executed on a computer, enables the computer to execute the uplink power control method described in any possible implementation of the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic diagram of uplink power control for single-cell measurement provided in an embodiment of the present application;

[0054] Figure 2 A schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0055] Figure 3 A schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0056] Figure 4 A schematic diagram of a flow chart of an uplink power control method provided in an embodiment of the present application;

[0057] Figure 5 A schematic diagram of a flow chart of another uplink power control method provided in an embodiment of the present application;

[0058] Figure 6 A schematic diagram of a flow chart of another uplink power control method provided in an embodiment of the present application;

[0059] Figure 7 A schematic diagram of a flow chart of another uplink power control method provided in an embodiment of the present application;

[0060] Figure 8 A schematic diagram of a terminal device provided in an embodiment of the present application Figure 1 ;

[0061] Fig. 9 A schematic diagram of a terminal device provided in an embodiment of the present application Figure 2 ;

[0062] Fig.10 A schematic diagram of a network device provided in an embodiment of the present application Figure 1 ;

[0063] Fig.11 A schematic diagram of a network device provided in an embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0065] In this application, the character " / " generally indicates that the objects before and after are in an "or" relationship. For example, A / B can be understood as A or B.

[0066] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "plurality" means two or more.

[0067] In addition, the terms "including" and "having" and any variations thereof mentioned in the description of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or modules is not limited to the listed steps or modules, but may optionally include other steps or modules that are not listed, or may optionally include other steps or modules that are inherent to these processes, methods, products or devices.

[0068] In addition, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present concepts in a specific way.

[0069] In order to facilitate understanding of the technical solution of the present application, before introducing in detail an uplink power control method of an embodiment of the present application, conventional technology is first introduced.

[0070] Conventional technology 1: Uplink power control mechanism based on single cell measurement

[0071] like Figure 1FIG. 1 is a schematic diagram of uplink power control for single cell measurement, wherein transmission reception point (TRP) 1 provides services for UE1 and UE3, and TRP2 provides services for UE2.

[0072] When the UE transmits PUSCH using power parameter set number j (j is an integer greater than or equal to 0) on the uplink activation part bandwidth b of carrier f of serving cell c and the power control adjustment state index value is l, the UE determines the transmit power P of PUSCH at transmission opportunity i. PUSCH，b，f，c (i,j,q d , l) can satisfy formula 1.

[0073]

[0074] Among them, P CMAX，f，c (i) is the maximum output power configured at PUSCH transmission opportunity i on carrier f of serving cell c, is the target power value that the serving cell expects to receive, is the number of resource blocks (RBs) occupied by PUSCH at PUSCH transmission opportunity i on the uplink activated part bandwidth b of carrier f of serving cell c, μ is the value corresponding to the subcarrier size (SCS) configuration, and α b，f，c (j) is the path loss compensation factor, PL b，f，c (q d ) is the estimated value of downlink path loss, △ TF，b，f，c (i) is information related to the modulation and coding scheme (MCS), f b，f，c (i, l) is the PUSCH power control adjustment state at the PUSCH transmission opportunity i on the uplink activation part bandwidth b of the carrier f of the serving cell c, and l is 0 or 1.

[0075] It should be noted that P CMAX，f，c (i) It is related to factors such as the UE's transmission capability and the frequency domain resource allocation of PUSCH.

[0076] It is the dedicated nominal part of the configured service cell c and UE-specific part (hereinafter referred to as: P0) and.

[0077] Among them, P0 and α b，f，c(j) are all power parameters. The base station can configure multiple power parameter sets for the UE. The power parameter sets include: power control set ID, P0 and α b，f，c (j).

[0078] The UE can obtain power control parameters in the following two ways.

[0079] Method 1: The UE can determine the power parameter set number j used for the current PUSCH transmission according to the current transmission mode and the value indicated by the Sounding Reference Signal Indication (SRI) field, and then determine the values ​​of P0 and α according to the power parameter set number j. Specifically, when the base station configures multiple power parameter sets for the UE, and configures the corresponding rules between the power parameters and SRI for the UE, as well as the mapping relationship between the SRI field value and the power parameter set, and the DCI for scheduling PUSCH includes the SRI field, the UE can determine the power parameter set used by the UE to send PUSCH according to the above mapping relationship and the value of the SRI field.

[0080] Exemplarily, one SRI code bit corresponds to one power parameter set. The SRI field configured by the base station for the UE is 2 bits, and the SRI has four values ​​of 00 / 01 / 10 / 11, each of which corresponds to one power parameter set (ID, P0, α).

[0081] Mode 2: When the base station configures multiple power parameter sets for the UE and the DCI for scheduling the PUSCH does not include the SRI field, the default power parameter set number j is 2. The UE obtains the power parameters P0 and α according to the power parameter set with the smallest number.

[0082] PL b，f，c (q d ) is the UE based on the path loss reference signal q d The calculated downlink path loss estimate value can be used as a path loss compensation value for uplink power control. The downlink path loss estimate value can be determined in the following three ways.

[0083] Method 1: If the UE is not equipped with a PUSCH path loss reference signal (PUSCH-pathlossReferenceRS), or before the UE configures dedicated parameters, the UE calculates the downlink path loss estimate using a synchronization signal block (SSB), which is used to obtain a master information block (MIB).

[0084] Method 2: If the PUSCH transmission is scheduled by a random access response (RAR) uplink (UL) grant, the UE uses the same path loss reference signal index value as the related PRACH transmission to calculate the downlink path loss estimate.

[0085] Method 3: When multiple path loss reference signals (such as SSB or channel state indication reference signal (CSI-RS)) are configured, the RRC configuration information of the path loss reference signal includes: path loss reference signal ID and associated reference signal ID). Afterwards, the base station can configure the association relationship between multiple path loss reference signals and the SRI field for the UE, and the UE determines the reference signal corresponding to the value indicated by the SRI field according to the value indicated by the SRI field to determine the downlink path loss estimation value of the current PUSCH.

[0086] The estimated value of the downlink path loss can satisfy the following formula 2.

[0087] PL b，f，c (q d )=referenceSignalPower-higher layer filtered RSRP0 Formula 2

[0088] Among them, referenceSignalPower is the transmission power of the downlink reference signal configured by the higher layer signaling, and higher layer filtered RSRP0 is the received power of the reference signal after higher layer filtering received by the UE.

[0089] referenceSignalPower can be obtained in the following way.

[0090] Method 1: If the UE is not configured to receive periodic CSI-RS, the ReferenceSignalPower can be configured by the synchronized broadcast signal block power ss-PBCH-BlockPower.

[0091] Method 2: If the UE is configured to receive periodic CSI-RS, referenceSignalPower can be configured through ss-PBCH-BlockPower and powerControlOffsetSS, where powerControlOffsetSS is the difference between the transmission power of CSI-RS and the transmission power of SSB.

[0092] If the UE is not configured with powerControlOffsetSS, powerControlOffsetSS=0.

[0093] Δ TF，b，f，c (i) It can be determined by factors such as the type of information carried by PUSCH (for example, uplink shared channel (UL-SCH) data information, or channel state information (CSI) data information, etc.), the location and quantity of occupied physical resources, etc.

[0094] f b，f，c (i, l) is notified by the DCI signaling sent by the base station, which allows the base station to adjust the PUSCH transmission power in real time according to the current transmission channel status and scheduling situation.

[0095] Conventional Technology 2: Uplink Coordinated multi-point (UL CoMP)

[0096] UL CoMP refers to multiple transmission points separated by geographical location, which jointly receive and combine data sent by a terminal (such as PUSCH). The multiple transmission points participating in the collaboration usually refer to base stations in different cells. CoMP technology enables multiple cells to serve cell-edge UEs at the same time to improve the coverage performance of edge UEs, thereby improving the spectrum efficiency of cell-edge users.

[0097] For example, Figure 2 FIG. 1 is a schematic diagram of uplink multi-point coordinated transmission, wherein TRP1 provides services for UE1 and UE3, and TRP2 provides services for UE2 and UE3, that is, TRP1 and TRP2 provide services for UE3 at the same time.

[0098] Conventional Technology 3: Power headroom report (PHR)

[0099] The power headroom refers to the difference between the maximum uplink transmit power of the UE and the current PUSCH transmission power. In other words, the transmission power that the UE can use in addition to the transmission power used for the current PUSCH transmission. The power headroom can be determined by the following two methods.

[0100] Method 1: The power headroom is determined based on PUSCH, and the power headroom can satisfy the following formula 3.

[0101]

[0102] Among them, PH type，b，f，c (i,J,qd , l) is the power margin, and other parameters can be described in the parameters of formula 1, which will not be repeated here.

[0103] Method 2: The power margin is determined based on SRS transmission.

[0104] It should be noted that if the power headroom is a positive number, it means that the UE can transmit more data at the maximum power. If the power headroom is negative, it means that the UE's uplink transmission has exceeded the maximum allowed transmission power. In other words, the power headroom can affect the scheduling of the base station, or the power headroom report can be used as a reference for the base station to allocate uplink RB resources.

[0105] Meeting any of the following five conditions can trigger a power headroom report.

[0106] Condition 1: The PHR prohibition timer (phr-ProhibitTimer) expires or has expired, and the path loss changes by more than the PHR transmission power factor variable (phr-Tx-PowerFactorChange), where the path loss is the path loss of at least one activated serving cell of any MAC entity used as a path loss reference since the last time a PHR was transmitted in the MAC entity when the Media access control (MAC) entity has uplink resources for new transmissions.

[0107] Condition 2: The PHR periodic timer (phr-PeriodicTimer) expires.

[0108] Condition 3: The PHR function was last configured or reconfigured, but this action cannot disable the PHR function.

[0109] Condition 4: Activate the MAC entity of any configured uplink secondary cell (SCell).

[0110] Condition 5: Add PSCell (Primary Secondary Cell).

[0111] When multiple transmission points (eg, multiple base stations) cooperate to serve a terminal device, the transmission power of the terminal device determined based on single-station measurements may cause serious interference between users.

[0112] When multiple transmission points (eg, multiple base stations) cooperate to serve a terminal device, in order to reduce the interference of the transmission power of the terminal device on other users, this embodiment provides an uplink power control method.

[0113] To facilitate understanding of the embodiments of the present application, first Figure 3The communication system shown in the example is used to describe in detail the communication system applicable to the embodiment of the present application. Figure 3 A schematic diagram of the architecture of a communication system applicable to the uplink power control method provided in an embodiment of the present application.

[0114] like Figure 3 As shown, the communication system includes network equipment and terminal equipment. The network equipment includes core network equipment 310, wireless access network equipment 320, and wireless access network equipment 330, and the terminal equipment includes user terminal 340. Among them, wireless access network equipment 320 and wireless access network equipment 330 can jointly provide services for user terminal 340, the terminal equipment is connected to the wireless access network equipment in a wireless manner, and the wireless access network equipment is connected to the core network equipment in a wireless or wired manner.

[0115] The network device is located at the network side of the communication system and has a wireless transceiver function or is a chip or chip system that can be set in the device. The network device includes, but is not limited to, an access point (AP) in a wireless fidelity (WiFi) system, such as a home gateway, a router, a server, a switch, a bridge, etc., 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 NodeB, or homeNode B, HNB), a baseband unit (BBU), a wireless relay node, a wireless backhaul node, a transmission point (TRP or TP), etc., and can also be 5G, such as a gNB in ​​a new radio (NR) system, or a transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (distributed unit). unit (DU), roadside unit (RSU) with base station function, etc.

[0116] It should be noted that the core network device 310 and the wireless access network device 320 can be independent and different physical devices, or the functions of the core network device 310 and the logical functions of the wireless access network device 320 can be integrated on the same physical device, or part of the functions of the core network device 310 and part of the functions of the wireless access network device 320 can be integrated on one physical device.

[0117] The above-mentioned terminal device is a terminal that accesses the above-mentioned communication system and has a wireless transceiver function or a chip or chip system that can be set in the terminal. The terminal device can also be called a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The terminal device in the embodiment of the present application can be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmentedreality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving, a wireless terminal in telemedicine (remote medical), a wireless terminal in smart grid (smartgrid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in a smart city (smartcity), a wireless terminal in a smart home (smart home), a vehicle-mounted terminal, an RSU with a terminal function, etc. The terminal device of the present application can also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit that is built into the vehicle as one or more components or units. The vehicle can implement the uplink power control method provided by the present application through the built-in vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit.

[0118] It should be pointed out that the solutions in the embodiments of the present application can also be applied to other communication systems, and the corresponding names can also be replaced by the names of corresponding functions in other communication systems.

[0119] It should be understood that Figure 3 This is a simplified schematic diagram for ease of understanding only. The communication system may also include other network devices and / or other terminal devices. Figure 3 Not drawn in.

[0120] The following will be combined Figure 4-Figure 7 The uplink power control method provided in the embodiment of the present application is specifically described.

[0121] For example, Figure 4 A schematic diagram of the flow of the uplink power control method provided in the embodiment of the present application. Figure 4 As shown, the uplink power control method may include S401-S404.

[0122] S401. UE obtains a first power parameter.

[0123] The first power parameter includes at least one of the following: power offset P0, path loss compensation factor α. In the embodiment of the present application, the first power parameter is also called power parameter, which is not limited in the embodiment of the present application.

[0124] Exemplarily, the network device sends the first power parameter to the UE. The UE receives the first power parameter sent by the network device. For example, the network device sends first indication information to the UE, where the first indication information is used to indicate the first power parameter. The UE receives the first indication information to obtain the first power parameter.

[0125] In the embodiment of the present application, the first indication information has the following two implementation methods.

[0126] Mode a: The first indication information is a field in DCI, and DCI is used to schedule PUSCH transmission.

[0127] It should be noted that the field in the DCI may be an SRI field or other fields in the DCI, which is not limited in the embodiment of the present application. The following takes the field in the DCI as an example to illustrate the embodiment of the present application.

[0128] In mode a, the network device sends a correspondence between a value of the first indication information and at least two power parameters to the UE. The first indication information includes: a power parameter, and a mapping relationship between a value of the SRI field and a power parameter; or a mapping relationship between a value of the SRI field and a power parameter index; or a mapping relationship between a value of the SRI field and a power parameter set index. The power parameter set includes the first power parameter.

[0129] Mode a1: The network device sends a correspondence between a value of the first indication information and a power parameter to the UE, and the network device uses the media access control unit to update the correspondence between the value of the first indication information and the power parameter, so that the UE obtains the updated power parameter.

[0130] Exemplarily, before the network device sends the first power parameter to the UE, the network device sends first information to the UE. The first information is used to indicate a mapping relationship between the first indication information and the second power parameter, and the first information is a high-level parameter, or the first information is a radio resource control RRC signaling. The second power parameter includes at least one of the following: a power offset P0, and a path loss compensation factor.

[0131] Afterwards, the network device sends a media access control element (MAC CE) to the UE, where the MAC CE is used to indicate a mapping relationship between the first indication information and the first power parameter.

[0132] It should be noted that the second power parameter is a power parameter when the UE only accesses the primary serving cell. The first power parameter is a power parameter when the UE accesses both the primary serving cell and the coordinated serving cell. Therefore, the first power parameter is different from the second power parameter.

[0133] Optionally, before the network device sends a MAC CE to the UE, the network device sends second information to the UE, where the second information is used to enable the UE to update a power parameter.

[0134] Optionally, before the network device sends the first power parameter to the UE, the network device sends second information to the UE, where the second information is used to enable the UE to update the power parameter.

[0135] Mode b: the first indication information is coordinated multi-point transmission CoMP configuration information.

[0136] The CoMP configuration information includes a first power parameter and reference signal information. In mode b, the first power parameter also includes a path loss reference signal. The reference signal information includes at least one of the following information: a sounding reference signal SRS time-frequency resource, an SRS scrambling sequence, a demodulation reference signal (DMRS) scrambling sequence, and a DMRS time-frequency resource.

[0137] In a possible implementation manner, the network device generates CoMP configuration information according to the first power parameter. Then, the network device sends the CoMP configuration information to the UE.

[0138] It should be noted that, according to Formula 1, the first transmit power is determined by the first power parameter and the third power parameter. Therefore, in the embodiment of the present application, the network device also sends the third power parameter to the UE, and the third power parameter includes: PL b，f，c (q d ), Δ TF，b，f，c(i) f b，f，c (i, l), for the specific explanation of the third power parameter, refer to the above explanation of formula 1, which will not be repeated here. Specifically, when the network device sends the first power parameter to the UE, or before the network device sends the first power parameter to the UE, or after the network device sends the first power parameter to the UE, the third power parameter is sent to the UE, and this embodiment of the present application is not limited to this.

[0139] S402. The UE determines a first transmit power according to a first power parameter.

[0140] In a possible implementation, a UE receives first indication information from a network device, where the first indication information is used to indicate a first power parameter. The UE obtains the first power parameter according to the first indication information. Thereafter, the UE determines a first transmit power according to the first power parameter.

[0141] In one possible design, the first indication information is represented in the same manner as that of method a in S501, that is, the first indication information is an SRI field. The UE receives the SRI field from the network device and obtains the first power parameter based on the correspondence between the value indicated by the SRI field and the power parameter.

[0142] It should be noted that, when the first indication information is the SRI field, the UE stores the mapping relationship between the value of the SRI field and the power parameter; or, the mapping relationship between the value of the SRI field and the power parameter index; or, the mapping relationship between the value of the SRI field and the power parameter set index. The mapping relationship between the value of the SRI field and the power parameter; or, the mapping relationship between the value of the SRI field and the power parameter index; or, the mapping relationship between the value of the SRI field and the power parameter set index stored in the UE is an RRC configuration sent by the network device before the UE receives the first indication information from the network device.

[0143] In some embodiments, the UE receives first information, and the first information is used to indicate a mapping relationship between the SRI and the second power parameter. That is, the mapping relationship between the SRI and the second power parameter is stored in the UE. Since the second power parameter is a power parameter when the UE only accesses the primary service cell. Therefore, when the first information is stored in the UE, it indicates that the power parameter in the power parameter set stored in the UE is the second power parameter. That is, the UE can obtain the SRI field and obtain the power parameter when the UE only accesses the primary service cell according to the value indicated by the SRI field.

[0144] It is understandable that when the UE only accesses the primary serving cell, the UE can obtain the SRI field and determine the power parameter set and the second power parameter according to the SRI field. In this way, the UE can use the second power parameter to control the transmit power when only accessing the primary serving cell.

[0145] Optionally, if the UE stores the first information, before the UE obtains the SRI field, the UE receives the MACCE sent by the network device, so that the updated first information is used to indicate the mapping relationship between the SRI and the first power parameter. That is, after the UE receives the MAC CE, the mapping relationship between the SRI field and the second power parameter stored in the UE is updated to the mapping relationship between the SRI field and the first power parameter.

[0146] Exemplarily, the UE stores a corresponding relationship that when the value indicated by the SRI field is 00, P0 is 6 decibels relative to one milliwatt (dBm). The UE receives a MAC CE sent by a network device, and the MAC CE is used to indicate that when the value indicated by the SRI field is 00, P0 is 4dBm. That is, after the UE receives the MAC CE, the UE stores a corresponding relationship that when the value indicated by the SRI field is 00, P0 is 4dBm.

[0147] It is understandable that when the UE simultaneously accesses the primary service cell and the coordinated service cell, the UE obtains the SRI field and can obtain the first power parameter according to the value indicated by the SRI field and the updated first information. In this way, when the UE simultaneously accesses the primary service cell and the coordinated service cell, the first power parameter can be used to control the transmit power, thereby avoiding using the second power parameter to control the transmit power, resulting in excessive transmit power and interference to other UEs.

[0148] Optionally, before the UE obtains the MAC CE, the UE obtains second information, and the second information is used to enable the UE to update the power parameter. That is, after the UE obtains the second information, the UE receives the MAC CE, so that the MAC updates the first information.

[0149] It should be noted that, in the embodiment of the present application, when the first information is stored in the UE, the actions performed by the UE include: (1) the UE receives the second information. (2) the UE receives the first information. (3) the UE receives the MAC CE. (4) the UE receives the first indication information. (5) the UE determines the first power parameter. Among them, the UE may first execute (1) and / or (2) (that is, the UE first executes (1) and then executes (2); or the UE first executes (2) and then executes (1); or the UE executes (1) and (2) at the same time), and then executes (3), (4), and (5) in sequence.

[0150] In another possible design, the first indication information is represented in the same manner as the representation manner of manner b in S501, that is, the first indication information is CoMP configuration information. The UE receives the CoMP configuration information from the network device and obtains the first power parameter from the CoMP configuration information.

[0151] In the embodiment of the present application, the first transmit power satisfies the following formula 4:

[0152]

[0153] Among them, P PUSCH，b，f，c (i,j,q d , l) is the transmit power (i.e., the first transmit power) of the PUSCH determined by the UE at the PUSCH transmission opportunity i, P O_CoMP，b，f，c (j) (i.e., P0) is the target power value that the serving cell expects to receive, P PUSCH，b，f，c (i,j,q d , 1), α b，f，c (j)(i.e. α), PL b，f，c (q d ), Δ TF，b，f，c (i) f b，f，c (i, l) can refer to the description of formula 1, which will not be repeated here.

[0154] It is understandable that since P0 and α are determined by the network device according to the situation that the UE simultaneously accesses the primary serving cell and the coordinated serving cell, the first transmit power of the technical solution of the present application is more accurate than the transmit power determined by the technical solution of conventional technology 1.

[0155] S403: The UE sends a first uplink transmission using a first transmit power.

[0156] It is understandable that, compared with the transmit power determined by the technical solution of conventional technology 1, the first transmit power determined by the technical solution of the present application is more accurate, that is, the first transmit power will not be too large. Therefore, the UE sending the first uplink transmission using the first transmit power will not cause interference to other UEs.

[0157] S404: The network device receives a first uplink transmission.

[0158] Based on the above technical solution, after obtaining the first power parameter: power offset and / or path loss compensation factor, the UE can determine the first transmit power according to the power offset and / or path loss compensation factor to ensure that the first transmit power is not too large. Therefore, in the technical solution of the present application, when the UE uses the first transmit power to send the first uplink transmission, the interference generated by other UEs is reduced.

[0159] In the embodiment of the present application, the network device includes a first network device and a second network device. The following takes the first network device as TRP1 and the second network device as TRP2 as an example to illustrate the embodiment of the present application. Among them, TRP1 is the network device of the primary service cell of the UE, and TRP2 is the network device of the coordinated service cell of the UE.

[0160] In some embodiments, before the network device sends the first power parameter to the UE, the terminal sends two uplink transmissions to the network device to implement uplink power control of the UE. For example, taking the network devices as TRP1 and TRP2 as an example, the UE sends the second uplink transmission to TRP1, and the UE sends the third uplink transmission to TRP2. The second uplink transmission is the same as the third uplink transmission, or the second uplink transmission is different from the third uplink transmission.

[0161] The following takes the case where before TRP1 sends the first power parameter to the UE, the UE sends the second uplink transmission to TRP1, and the UE sends the third uplink transmission to TRP2 as an example to illustrate an uplink power control method provided in an embodiment of the present application. Figure 5 As shown, the uplink power control method may include S501-S508:

[0162] S501. UE sends a second uplink transmission to TRP1.

[0163] The second uplink transmission includes: SRS; or, the second uplink transmission is PUSCH; or, when the second uplink transmission is PUSCH, PUSCH carries the first PHR, and the first power headroom report PHR includes the first maximum transmit power reported by the UE. The SRS includes: aperiodic SRS, semi-static SRS, and periodic SRS.

[0164] It should be noted that after the UE receives the fourth information, the UE sends the first PHR when sending the second uplink transmission to TRP1. The fourth information includes: DCI, MAC CE, and radio resource control RRC signaling.

[0165] In a possible implementation, the UE receives third information sent by TRP1, where the third information is used to instruct the UE to send a second uplink transmission to TRP1. Thereafter, the UE sends the second uplink transmission to TRP1.

[0166] In another possible implementation, the UE sends a second uplink transmission to TRP1 without receiving the third information. In this case, the second uplink transmission includes: periodic SRS and PUSCH.

[0167] Optionally, when the UE sends the second uplink transmission to TRP1, the UE reports the transmit power of the second uplink transmission to TRP1.

[0168] S502. The UE sends a third uplink transmission to TRP2.

[0169] Optionally, the third uplink transmission further includes: SRS; or, the third uplink transmission is PUSCH; or, when the third uplink transmission is PUSCH, PUSCH carries the second PHR, and the second PHR includes the maximum transmission power reported by the UE. Among them, SRS includes: aperiodic SRS, semi-static SRS, and periodic SRS.

[0170] It should be noted that after the UE receives the fourth information, the UE sends the second PHR only when it sends the third uplink transmission to TRP2.

[0171] It should be noted that the second uplink transmission and the third uplink transmission may be the same or different, and the embodiment of the present application does not limit this. For example, the second uplink transmission and the third uplink transmission are both periodic SRS. For another example, the second uplink transmission is periodic SRS, and the third uplink transmission is PUSCH.

[0172] In a possible implementation, the UE receives the third information sent by TRP1, where the third information is also used to instruct the UE to send a third uplink transmission to TRP2. Afterwards, the UE sends the third uplink transmission to TRP2.

[0173] In another possible implementation, the UE sends a third uplink transmission to TRP2 without receiving the third information. In this case, the third uplink transmission includes: periodic SRS and PUSCH.

[0174] Optionally, when the UE sends the third uplink transmission to TRP2, the UE reports the transmit power of the third uplink transmission to TRP2.

[0175] S503. TRP2 receives a third uplink transmission and obtains a measurement value of the third uplink transmission.

[0176] The measured value is the uplink shared channel received power, or the reference signal received power (RSRP). That is, TRP2 can obtain the uplink shared channel received power of the third uplink transmission, or can obtain the second RSRP of the third uplink transmission. The following takes the third uplink transmission as the second RSRP as an example to illustrate the embodiment of the present application.

[0177] In the embodiment of the present application, RSRP is SRS-RSRP or DMRS-RSRP, which is not limited in the embodiment of the present application.

[0178] In one possible design, TRP2 obtains the second RSRP and then sends the second RSRP to TRP1.

[0179] In another possible design, TRP2 obtains the transmit power of the third uplink transmission and then sends the transmit power of the third uplink transmission to TRP1.

[0180] In another possible design, TRP2 obtains the second RSRP and the transmit power of the third uplink transmission. TRP2 determines the second uplink path loss according to the second RSRP and the transmit power of the third uplink transmission, and sends the second uplink path loss to TRP1. The second uplink path loss = the transmit power of the third uplink transmission - the second RSRP.

[0181] S504. TRP1 receives a second uplink transmission and obtains a measurement value of the second uplink transmission.

[0182] In a possible implementation manner, TRP1 obtains the uplink shared channel received power of the second uplink transmission, or TRP1 obtains the first RSRP of the second uplink transmission.

[0183] It should be noted that after the UE sends the second uplink transmission and the third uplink transmission, TRP1 determines the first power parameter in the following three ways.

[0184] Method 1: TRP1 obtains the measurement value of the second uplink transmission and the measurement value of the third uplink transmission, and determines the first power parameter according to the measurement value of the second uplink transmission and the measurement value of the third uplink transmission.

[0185] Exemplarily, TRP1 acquires the first RSRP and the second RSRP and determines the first power parameter according to the difference between the first RSRP and the second RSRP.

[0186] It should be noted that, since the first uplink path loss and the second uplink path loss may be different, or the transmit power of the UE sending the second uplink transmission may be different from the transmit power of the UE sending the third uplink transmission, and RSRP is affected by factors such as uplink path loss and transmit power, the first RSRP and the second RSRP may also be different.

[0187] Method 2: TRP1 obtains the transmit power of the second uplink transmission and the transmit power of the third uplink transmission, and determines the first power parameter according to the transmit power of the second uplink transmission and the transmit power of the third uplink transmission.

[0188] Method three: TRP1 obtains a first uplink path loss corresponding to the second uplink transmission and a second uplink path loss corresponding to the third uplink transmission, and determines a first power parameter according to the first uplink path loss and the second uplink path loss.

[0189] Exemplarily, TRP1 obtains the first RSRP and the transmit power of the second uplink transmission, and determines the first uplink path loss, the first uplink path loss-the transmit power of the second uplink transmission-the first RSRP. Afterwards, TRP1 receives the second uplink path loss sent by TRP2. TRP1 determines the first power parameter based on the first uplink path loss and the second uplink path loss.

[0190] S505. TRP1 sends a first power parameter to the UE.

[0191] S506. The UE obtains a first power parameter.

[0192] S507. The UE determines a first transmit power according to the first power parameter.

[0193] S508. The UE sends a first uplink transmission using a first transmit power.

[0194] It should be noted that, for the description of S505-S508, reference may be made to the description of S401-S404 above, which will not be repeated here.

[0195] Based on the above technical solution, since the network device receives the second uplink transmission and / or the third uplink transmission. Therefore, the network device can determine the first power parameter (power offset and path loss compensation factor) according to the uplink transmission. Therefore, after obtaining the first power parameter, the UE can determine the first transmit power according to the power offset and the path loss compensation factor to ensure that the first transmit power is not too large. Therefore, in the technical solution of the present application, when the UE uses the first transmit power to send the first uplink transmission, it will not cause interference to other UEs.

[0196] In other embodiments, before the network device sends the first power parameter to the UE, the terminal sends an uplink transmission to implement uplink power control of the UE. For example, taking the network devices as TRP1 and TRP2 as an example, before TRP1 sends the first power parameter to the UE, the UE sends a second uplink transmission, and both TRP1 and TRP2 receive the second uplink transmission.

[0197] The following takes the case where before TRP1 sends the first power parameter to the UE, the UE sends a second uplink transmission, and both TRP1 and TRP2 receive the second uplink transmission as an example to illustrate an uplink power control method provided in an embodiment of the present application. Figure 6 As shown, the uplink power control method may further include S601-S607:

[0198] S601. UE sends a second uplink transmission.

[0199] The second uplink transmission includes: SRS; or, the second uplink transmission is PUSCH; or, when the second uplink transmission is PUSCH, PUSCH carries the first PHR, and the first PHR includes the first maximum transmit power reported by the UE. The SRS includes: aperiodic SRS, semi-static SRS, and periodic SRS.

[0200] It should be noted that after the UE receives the fourth information, the UE sends the first PHR only when sending the second uplink transmission.

[0201] In a possible implementation, the UE receives the third information sent by TRP1, where the third information is also used to instruct the UE to send a second uplink transmission. Afterwards, the UE sends the second uplink transmission.

[0202] In another possible implementation, the UE sends a second uplink transmission without receiving the third information. In this case, the second uplink transmission includes: periodic SRS and PUSCH.

[0203] Optionally, when the UE sends the second uplink transmission, it reports the transmit power of the second uplink transmission.

[0204] S602. TRP2 receives a second uplink transmission and obtains a measurement value of the second uplink transmission.

[0205] In one possible design, TRP2 obtains the measurement value of the second uplink transmission. Then, TRP2 sends the measurement value of the second uplink transmission to TRP1.

[0206] S603. TRP1 receives a second uplink transmission and obtains a measurement value of the second uplink transmission.

[0207] In a possible implementation manner, TRP1 receives the second uplink transmission sent by the UE and obtains a measurement value of the second uplink transmission.

[0208] In one possible design, TRP1 receives the measurement value of the second uplink transmission sent by TRP2.

[0209] It should be noted that the measurement value of the second uplink transmission obtained by TRP1 and the measurement value of the second uplink transmission sent by TRP2 and received by TRP1 may be the same as or different from each other.

[0210] Optionally, TRP1 determines the first power parameter according to the measurement value of the second uplink transmission acquired by TRP1 and the measurement value of the second uplink transmission sent by TRP2 and received by TRP1.

[0211] S604. TRP1 sends a first power parameter to the UE.

[0212] S605. The UE obtains a first power parameter.

[0213] S606. The UE determines a first transmit power according to the first power parameter.

[0214] S607: The UE sends a first uplink transmission using a first transmit power.

[0215] It should be noted that, for the description of S604-S607, reference may be made to the description of S401-S404 above, which will not be repeated here.

[0216] Optionally, before the UE sends an uplink transmission, TRP1 and TRP2 send a path loss signal. Figure 7 As shown, before S501 and S502, or before S601, the uplink power control method may further include S701-S703.

[0217] S701. TRP2 sends a second path loss reference signal.

[0218] The second path loss reference signal is a path loss reference signal of a second uplink path. The second uplink path is an uplink path between the UE and TRP2.

[0219] In one possible design, TRP2 sends a second path loss reference signal to the UE.

[0220] In another possible design, TRP2 sends a second path loss reference signal to TRP1.

[0221] S702. TRP1 sends a first path loss reference signal.

[0222] The first path loss reference signal is a path loss reference signal of a first uplink path. The first uplink path is an uplink path between the UE and TRP1.

[0223] Optionally, TRP1 receives a second path loss reference signal, and sends the first path loss reference signal and the second path loss reference signal to the UE.

[0224] Optionally, TRP1 sends fourth information to the UE, where the fourth information is used to instruct the UE to transmit a PHR. The fourth information includes: DCI, MAC CE, and RRC signaling.

[0225] S703. The UE obtains a first path loss reference signal and a second path loss reference signal.

[0226] In a possible implementation manner, the UE obtains a first path loss reference signal sent by TRP1, and the UE obtains a second path loss reference signal sent by TRP2.

[0227] In another possible implementation manner, the UE obtains the first path loss reference signal and the second path loss reference signal sent by TRP1.

[0228] Optionally, after the UE acquires the first path loss reference signal and the second path loss reference signal, the UE determines a first PHR according to the first path loss reference signal; and the UE determines a second PHR according to the second path loss reference signal.

[0229] In a possible implementation, the UE obtains a first downlink path loss value of a first downlink path according to a first path loss reference signal, and determines a first PHR according to the first downlink path loss value. The UE obtains a second downlink path loss value of a second downlink path according to a second path loss reference signal, and determines a second PHR according to the second downlink path loss value.

[0230] It should be noted that the TRP1 in the above S501-S508, S601-S607, and S701-S703 is the network device in S401-S404 in the embodiment of the present application. In other words, the network devices in S401-S404 can all execute the actions executed by TRP1.

[0231] Combination of the above Figure 4-Figure 7 The uplink power control method provided by the embodiment of the present application is described in detail. Figure 8-Figure 11 The terminal device provided in the embodiment of the present application is described in detail.

[0232] For example, Figure 8 This is a schematic diagram of the structure of the terminal device provided in the embodiment of the present application. Figure 1 .like Figure 8 As shown, the terminal device includes: an acquisition unit 801, a determination unit 802, and a sending unit 803. For the convenience of description, Figure 8 Only main components of the uplink power control apparatus are shown.

[0233] In one possible design, the terminal device may be adapted to Figure 3 or Figure 4 In the communication system shown, execution Figure 4-Figure 7 The function of controlling uplink power in the uplink power control method shown.

[0234] The acquisition unit 801 is used to acquire a first power parameter, and the first power parameter includes at least one of the following: a power offset and a path loss compensation factor. The determination unit 802 is used to determine a first transmit power according to the first power parameter. The sending unit 803 is used to send a first uplink transmission using the first transmit power.

[0235] Optionally, the acquisition unit 801 is specifically used to receive first indication information, where the first indication information is used to indicate a first power parameter; obtain first information, where the first information is used to indicate a mapping relationship between the first indication information and the second power parameter; and obtain a media access control unit, where the media access control unit is used to indicate a mapping relationship between the first indication information and the first power parameter.

[0236] Optionally, the acquisition unit 801 is further used to acquire second information, where the second information is used to enable the terminal device to update the power parameters.

[0237] Optionally, the sending unit 803 is further configured to send a second uplink transmission and / or a third uplink transmission.

[0238] Optionally, the acquisition unit 801 is further configured to acquire a first path loss reference signal and a second path loss reference signal. The second uplink transmission includes a first power headroom report determined according to the first path loss reference signal, and the third uplink transmission includes a second power headroom report determined according to the second path loss reference signal.

[0239] Optionally, Figure 8 The terminal device shown may also include a storage module ( Figure 8 (not shown in the figure), the storage module stores a program or instruction. When the determination unit 802 executes the program or instruction, the terminal device can execute Figure 4-Figure 7 The function of controlling uplink power in the uplink power control method shown.

[0240] In addition, the technical effects of the terminal equipment can be referred to Figure 4-Figure 7 The technical effects of the uplink power control method shown are not repeated here.

[0241] For example, Fig. 9 A schematic diagram of the structure of the terminal device provided in the embodiment of the present application Figure 2 .like Fig. 9 As shown, the terminal device may include a processor 901. Optionally, the terminal device may further include a memory 902 and / or a transceiver 903. The processor 901 is coupled with the memory 902 and the transceiver 903, such as being connected via a communication bus.

[0242] Combine the following Fig. 9 The following is a detailed introduction to the various components of the terminal equipment:

[0243] The processor 901 is the control center of the terminal device, which can be a processor or a general term for multiple processing elements. For example, the processor 901 is one or more central processing units (CPUs), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more microprocessors (digital signal processors, DSPs), or one or more field programmable gate arrays (field programmable gate arrays, FPGAs).

[0244] Optionally, the processor 901 may execute various functions of the terminal device by running or executing a software program stored in the memory 902 , and calling data stored in the memory 902 .

[0245] In a specific implementation, as an embodiment, the network device 1100 may also include multiple processors, such as Fig. 9 901 and processor 904 are shown in FIG. Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor here may refer to one or more communication devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0246] The memory 902 is used to store the software program for executing the solution of the present application, and the execution is controlled by the processor 901. The specific implementation method can refer to the above method embodiment, which will not be repeated here.

[0247] Optionally, the memory 902 may be a read-only memory (ROM) or other types of static storage communication devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage communication devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage communication device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 902 may be integrated with the processor 901, or may exist independently and be accessed through the input / output port ( Fig. 9 (not shown) is coupled to the processor 901, which is not specifically limited in the embodiment of the present application.

[0248] The transceiver 903 is used for communication with other terminal devices. For example, if the terminal device is a terminal device, the transceiver 903 can be used to communicate with a network device or another terminal device. For another example, if the terminal device is a network device, the transceiver 903 can be used to communicate with the terminal device or another network device.

[0249] Optionally, the transceiver 903 may include a receiver and a transmitter ( Fig. 9 The receiver is used to implement a receiving function, and the transmitter is used to implement a sending function.

[0250] Optionally, the transceiver 903 may be integrated with the processor 901, or may exist independently and be connected to the terminal device through an input / output port ( Fig. 9 (not shown) is coupled to the processor 901, which is not specifically limited in the embodiment of the present application.

[0251] For example, Fig.10 This is a schematic diagram of the structure of the network device provided in the embodiment of the present application. Figure 1 .like Fig.10 As shown, the network device includes: a sending unit 1001, a receiving unit 1002, and a determining unit 1003. For the convenience of description, Fig.10 Only the main components of the network device are shown.

[0252] In one possible design, the network equipment may be adapted to Figure 3 or Figure 4 In the communication system shown, execution Figure 4-Figure 7 The function of controlling uplink power in the uplink power control method shown.

[0253] The sending unit 1001 is used to send a first power parameter to the terminal device, and the first power parameter includes at least one of the following: power offset, path loss compensation factor. The receiving unit 1002 is used to receive a first uplink transmission, and the transmission power of the first uplink transmission is determined according to the first power parameter.

[0254] Optionally, the sending unit 1001 is specifically used to send a first indication message to the terminal device, where the first indication message is used to indicate a first power parameter; send a first information to the terminal device, where the first information is used to indicate a mapping relationship between the first indication information and the second power parameter; and send a media access control unit to the terminal device, where the media access control unit is used to indicate a mapping relationship between the first indication information and the first power parameter.

[0255] Optionally, the sending unit 1001 is further used to send second information, where the second information is used to enable the terminal device to update power parameters.

[0256] Optionally, the receiving unit 1002 is further configured to receive a second uplink transmission and obtain one or more measurement values ​​of the second uplink transmission. The determining unit 1003 is configured to determine the first power parameter according to the one or more measurement values ​​of the second uplink transmission.

[0257] Optionally, the receiving unit 1002 is further used to obtain a measurement value of the second uplink transmission and a measurement value of the third uplink transmission. The determining unit 1003 is further used to determine the first power parameter based on the measurement value of the second uplink transmission and the measurement value of the third uplink transmission. The receiving unit 1002 is further used to obtain the transmit power of the second uplink transmission and the transmit power of the third uplink transmission. The determining unit 1003 is further used to determine the first power parameter based on the transmit power of the second uplink transmission and the transmit power of the third uplink transmission. The receiving unit 1002 is further used to obtain a first uplink path loss corresponding to the second uplink transmission and a second uplink path loss corresponding to the third uplink transmission. The determining unit 1003 is further used to determine the first power parameter based on the first uplink path loss and the second uplink path loss.

[0258] Optionally, the measured value of the uplink transmission is the uplink shared channel received power; or, the demodulation reference signal received power of the uplink transmission.

[0259] Optionally, the sending unit 1001 is further configured to send a first path loss reference signal and a second path loss reference signal.

[0260] Optionally, Fig.10 The network device shown may also include a storage module ( Fig.10 (not shown), the storage module stores a program or instruction. When the determination unit 1003 executes the program or instruction, the network device can execute Figure 4-Figure 7 The function of controlling uplink power in the uplink power control method shown.

[0261] In addition, the technical effects of network equipment can be referred to Figure 4-Figure 7 The technical effects of the uplink power control method shown are not repeated here.

[0262] For example, Fig.11 A schematic diagram of the structure of the network device provided in the embodiment of the present application Figure 2 The network device may be a terminal device or a network device, or may be a chip (system) or other component or assembly that can be set in the terminal device or the network device. Fig.11 As shown, the network device may include a processor 1101. Optionally, the network device may further include a memory 1102 and / or a transceiver 1103. The processor 1101 is coupled to the memory 1102 and the transceiver 1103, such as being connected via a communication bus.

[0263] Combine the following Fig.11 A detailed introduction to each component of the network equipment:

[0264] The processor 1101 is the control center of the network device, which may be a processor or a general term for multiple processing elements. For example, the processor 1101 is one or more central processing units (CPUs), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more microprocessors (digital signal processors, DSPs), or one or more field programmable gate arrays (FPGAs).

[0265] Optionally, the processor 1101 may perform various functions of the network device by running or executing a software program stored in the memory 1102 , and calling data stored in the memory 1102 .

[0266] In a specific implementation, as an embodiment, the network device may also include multiple processors, such as Fig.111 and 1104. Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor here may refer to one or more communication devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0267] The memory 1102 is used to store the software program for executing the solution of the present application, and the execution is controlled by the processor 1101. The specific implementation method can refer to the above method embodiment, which will not be repeated here.

[0268] Optionally, the memory 1102 may be a read-only memory (ROM) or other types of static storage communication devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage communication devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage communication device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 1102 may be integrated with the processor 1101, or may exist independently and be accessed through the input / output port ( Fig.11 1101) is coupled to the processor 1101, which is not specifically limited in the embodiments of the present application.

[0269] The transceiver 1103 is used for communication with other network devices. For example, if the network device is a terminal device, the transceiver 1103 can be used to communicate with the network device, or with another terminal device. For another example, if the network device is a network device, the transceiver 1103 can be used to communicate with the terminal device, or with another network device.

[0270] Optionally, the transceiver 1103 may include a receiver and a transmitter ( Fig.11 The receiver is used to implement a receiving function, and the transmitter is used to implement a sending function.

[0271] Optionally, the transceiver 1103 may be integrated with the processor 1101, or may exist independently and be connected to the network device through an input / output port ( Fig.11 1101) is coupled to the processor 1101, which is not specifically limited in the embodiments of the present application.

[0272] It should be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) 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 also be any conventional processor, etc.

[0273] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0274] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can 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 or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0275] It should be understood that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship. Please refer to the context for specific understanding.

[0276] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0277] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0278] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0279] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0280] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0281] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0282] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0283] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to conventional technology. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

[0284] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An uplink power control method, characterized in that: The method comprises: The terminal device receives first indication information, where the first indication information includes: a field in a DCI or multi-point coordinated transmission CoMP configuration information, where the DCI is used to schedule PUSCH transmission, and the CoMP configuration information includes a first power parameter and reference signal information; the first indication information is used to indicate the first power parameter, where the first power parameter includes at least one of the following: a power offset, a path loss compensation factor, and the first power parameter is a power parameter when the terminal device simultaneously accesses a primary service cell and a coordinated service cell; The terminal device determines a first transmit power according to the first power parameter; The terminal device sends a first uplink transmission using the first transmit power.

2. The method according to claim 1, characterized in that Before the terminal device receives the first indication information, the method further includes: The terminal device acquires first information, where the first information is used to indicate a mapping relationship between the first indication information and a second power parameter; The terminal device obtains a media access control unit, where the media access control unit is used to indicate a mapping relationship between the first indication information and the first power parameter.

3. The method according to claim 2, characterized in that Before the terminal device acquires the media access control unit, the method further includes: The terminal device obtains second information, where the second information is used to enable the terminal device to update power parameters.

4. The method according to any one of claims 1 to 3, characterized in that Before the terminal device acquires the first power parameter, the method further includes: The terminal device sends a second uplink transmission and / or a third uplink transmission.

5. The method according to claim 4, characterized in that Before the terminal device sends the second uplink transmission and / or the third uplink transmission, the method further includes: The terminal device acquires a first path loss reference signal and a second path loss reference signal; The second uplink transmission includes a first power headroom report determined according to the first path loss reference signal, and the third uplink transmission includes a second power headroom report determined according to the second path loss reference signal.

6. An uplink power control method, characterized in that: The method comprises: The network device sends first indication information to the terminal device, where the first indication information includes: a field in the DCI or multi-point coordinated transmission CoMP configuration information, where the DCI is used to schedule PUSCH transmission, and the CoMP configuration information includes a first power parameter and reference signal information; the first indication information is used to indicate the first power parameter, and the first power parameter includes at least one of the following: a power offset, a path loss compensation factor, and the first power parameter is a power parameter when the terminal device simultaneously accesses a primary service cell and a coordinated service cell; The network device receives a first uplink transmission, wherein a transmit power of the first uplink transmission is determined according to the first power parameter.

7. The method according to claim 6, characterized in that Before the network device sends the first power parameter to the terminal device, the method further includes: The network device sends first information to the terminal device, where the first information is used to indicate a mapping relationship between the first indication information and a second power parameter; The network device sends a media access control unit to the terminal device, where the media access control unit is used to indicate a mapping relationship between the first indication information and the first power parameter.

8. The method according to claim 7, characterized in that Before the network device sends the first power parameter to the terminal device, the method further includes: The network device sends second information, where the second information is used to enable the terminal device to update power parameters.

9. The method according to any one of claims 6 to 8, characterized in that: Before the network device sends the first power parameter to the terminal device, the method further includes: The network device receives a second uplink transmission and obtains one or more measurement values ​​of the second uplink transmission; The network device determines the first power parameter according to one or more measured values ​​of the second uplink transmission.

10. The method according to any one of claims 6 to 8, characterized in that: The method further comprises: The network device obtains a measurement value of the second uplink transmission and a measurement value of the third uplink transmission; the network device determines the first power parameter according to the measurement value of the second uplink transmission and the measurement value of the third uplink transmission; Alternatively, the network device obtains the transmit power of the second uplink transmission and the transmit power of the third uplink transmission; the network device determines the first power parameter according to the transmit power of the second uplink transmission and the transmit power of the third uplink transmission; Alternatively, the network device obtains a first uplink path loss corresponding to the second uplink transmission and a second uplink path loss corresponding to the third uplink transmission; and the network determines the first power parameter according to the first uplink path loss and the second uplink path loss.

11. The method according to claim 9, characterized in that The measured value of uplink transmission is the uplink shared channel received power; or, The measured value of uplink transmission is the demodulation reference signal received power.

12. The method according to any one of claims 6 to 8, characterized in that: Before the network device receives the second uplink transmission, the method further includes: The network device sends a first path loss reference signal and a second path loss reference signal.

13. A terminal device, characterized in that: The terminal device comprises: An acquisition unit is used to receive first indication information, where the first indication information includes: a field in a DCI or multi-point coordinated transmission CoMP configuration information, where the DCI is used to schedule PUSCH transmission, and the CoMP configuration information includes a first power parameter and reference signal information; the first indication information is used to indicate the first power parameter, and the first power parameter includes at least one of the following: a power offset, a path loss compensation factor, and the first power parameter is a power parameter when the terminal device simultaneously accesses a primary service cell and a coordinated service cell; A determining unit, configured to determine a first transmit power according to the first power parameter; A sending unit is used to send a first uplink transmission using the first transmit power.

14. The terminal device according to claim 13, characterized in that: The acquisition unit is specifically used for Acquire first information, where the first information is used to indicate a mapping relationship between the first indication information and a second power parameter; Acquire a media access control unit, where the media access control unit is used to indicate a mapping relationship between the first indication information and the first power parameter.

15. The terminal device according to claim 14, characterized in that: The acquisition unit is also used to Acquire second information, where the second information is used to enable the terminal device to update power parameters.

16. The terminal device according to any one of claims 13 to 15, characterized in that: The sending unit is further configured to send a second uplink transmission and / or a third uplink transmission.

17. The terminal device according to claim 16, characterized in that: The acquisition unit is also used to Acquire a first path loss reference signal and a second path loss reference signal; The second uplink transmission includes a first power headroom report determined according to the first path loss reference signal, and the third uplink transmission includes a second power headroom report determined according to the second path loss reference signal.

18. A network device, characterized in that: The network equipment includes: A sending unit, configured to send first indication information to a terminal device, the first indication information comprising: a field in a DCI or multi-point coordinated transmission CoMP configuration information, wherein the DCI is used to schedule PUSCH transmission, and the CoMP configuration information comprises a first power parameter and reference signal information; the first indication information is used to indicate the first power parameter, and the first power parameter comprises at least one of the following: a power offset, a path loss compensation factor, and the first power parameter is a power parameter when the terminal device simultaneously accesses a primary service cell and a coordinated service cell; The receiving unit is used to receive a first uplink transmission, wherein the transmission power of the first uplink transmission is determined according to the first power parameter.

19. The network device according to claim 18, characterized in that: The sending unit is specifically used for Sending first information to the terminal device, where the first information is used to indicate a mapping relationship between the first indication information and a second power parameter; A media access control unit is sent to the terminal device, where the media access control unit is used to indicate a mapping relationship between the first indication information and the first power parameter.

20. The network device according to claim 19, characterized in that: The sending unit is further used to send second information, where the second information is used to enable the terminal device to update the power parameters.

21. The network device according to any one of claims 18 to 20, characterized in that: The receiving unit is further configured to receive a second uplink transmission and obtain one or more measurement values ​​of the second uplink transmission; A determination unit is used to determine the first power parameter according to one or more measurement values ​​of the second uplink transmission.

22. The network device according to any one of claims 18 to 20, characterized in that: The receiving unit is further used to obtain a measurement value of the second uplink transmission and a measurement value of the third uplink transmission; a determining unit, configured to determine the first power parameter according to a measured value of the second uplink transmission and a measured value of the third uplink transmission; The receiving unit is further used to obtain the transmit power of the second uplink transmission and the transmit power of the third uplink transmission; The determining unit is further configured to determine a first power parameter according to the transmit power of the second uplink transmission and the transmit power of the third uplink transmission; The receiving unit is further configured to obtain a first uplink path loss corresponding to the second uplink transmission and a second uplink path loss corresponding to the third uplink transmission; The determining unit is further configured to determine the first power parameter according to the first uplink path loss and the second uplink path loss.

23. The network device according to claim 21, characterized in that: The measured value of the uplink transmission is the uplink shared channel received power, or, The measured value of uplink transmission is the demodulation reference signal received power.

24. The network device according to any one of claims 18 to 20, characterized in that: The sending unit is further configured to send a first path loss reference signal and a second path loss reference signal.

25. An uplink power control device, characterized in that: The uplink power control device comprises: a processor, the processor being coupled to a memory; The memory is used to store computer programs; The processor is used to execute the computer program stored in the memory, so that the uplink power control device performs the uplink power control method according to any one of claims 1 to 12.

26. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a computer program or an instruction. When the computer program or the instruction is executed on a computer, the computer is enabled to execute the uplink power control method according to any one of claims 1 to 12.

27. A computer program product, characterized in that The computer program product comprises: a computer program or an instruction, and when the computer program or the instruction is executed on a computer, the computer is enabled to execute the uplink power control method according to any one of claims 1 to 12.

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