RU2796253C1 - Method and device for transmission power control in uplink - Google Patents

Abstract

FIELD: communications.

SUBSTANCE: terminal device receives the first indication information, where the first indication information indicates the first precoding information and the second precoding information; determines a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information; determines a first transmission power based on the first power control parameter group, and transmits a first PUSCH channel repetition based on the first transmission power and the first precoding information; and determines a second transmission power based on the second group of power control parameters, and transmits a second PUSCH channel repetition based on the second transmission power and the second precoding information. For the same service data, the terminal device transmits the PUSCH channel to the network device twice: the first PUSCH channel repetition and the second PUSCH channel repetition.

EFFECT: ensuring the reliability of service transmissions in the uplink.

20 cl, 9 dwg, 1 tbl

Description

Cross-references to related applications

The present application claims the priority of Chinese Patent Application No. 202010365865.3, which was filed with the National Intellectual Property Administration of China on April 30, 2020 under the title "UPLINK POWER CONTROL METHOD AND APPARATUS", which is incorporated herein by reference throughout its fullness.

The technical field to which the invention belongs

The present application relates to the field of communication technologies, and in particular, to a method and apparatus for controlling transmission power in the uplink.

State of the art

The International Telecommunication Union (ITU) defines three types of application scenarios for fifth generation (5G) communication systems and mobile communication systems of the future: enhanced mobile broadband access (enhanced mobile broadband, eMBB), ultra-reliable communication with low latency (ultra-reliable low -latency communication, URLLC) and massive machine-type communications (mMTC). Typical URLLC communications services include tactile interactive applications such as industrial and process radio control, unmanned motion control, remote repair, and remote surgery. These services are characterized by ultra-high reliability, low latency, low data volume, sporadic bandwidth usage, and so on. Ensuring the reliability of the transmission of URLLC communication services is a task that the variants of the present application must solve.

The essence of the invention

Embodiments of the present application propose an uplink power control method and apparatus to ensure the reliability of transmissions of URLLC communication services.

According to a first aspect, an uplink power control method is provided. This method may be implemented by a terminal device or may be implemented by an integrated circuit (chip) in a terminal device. The following is a description using an example in which the agent is a terminal device. This terminal device receives the first indication information from the network device, where this first indication information indicates the first precoding information and the second precoding information, the first precoding information corresponds to the first repetition of the PUSCH (Physical Uplink Shared Channel), and the second precoding information corresponds to second repetition of the PUSCH channel. The terminal apparatus determines a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information; then determines the first transmission power based on the first group of power control parameters, and transmits the first PUSCH repetition based on the first transmission power and the first precoding information; and determines a second transmission power based on the second group of power control parameters, and transmits a second repetition of the PUSCH based on the second transmission power and the second precoding information. For the same service, the terminal device sends the PUSCH to the network device twice: the first repetition of the PUSCH and the second repetition of the PUSCH. This can improve the reliability of the service in the uplink. Further, the terminal device may send repetitions of the PUSCH to different network devices. For example, the terminal device may send the first PUSCH repetition to the first TRP and send the second PUSCH repetition to the second TRP. Since the distances from different TRPs to the terminal device are different and the channel conditions are also different, the first PUSCH repetition sent by the first transmission/reception point (TRP) and the second PUSCH repetition sent by the second point TRP are determined separately using different power control parameters. This can improve the performance and increase the reliability of repeating the PUSCH.

In one embodiment, the terminal device may receive second indication information from the network device, where the second indication information indicates a first power control parameter group and a second power control parameter group. This terminal apparatus can determine, from a set of power control parameters based on the second indication information, a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information. In this embodiment of the present application, the second indication information may flexibly indicate the first power control parameter group and the second power control parameter group.

In another possible embodiment, the terminal apparatus may determine the first power control parameter group and the second power control parameter group from the set of power control parameters in accordance with a predetermined rule. Optionally, this predefined rule comprises: the first power control parameter group and the second power control parameter group are the two power control parameter groups with the lowest indices in the power control parameter set. The terminal device may determine the first group of power control parameters and the second group of power control parameters without further indication from the network device. This reduces signaling costs.

In another possible embodiment, the first indication information further designates the first power control parameter group and the second power control parameter group. In addition to the first precoding information and the second precoding information, the terminal apparatus may further determine the first power control parameter group and the second power control parameter group based on the first indication information. It can be understood that both precoding information and power control parameters can be reported in one indication information segment, thereby reducing signaling overhead.

Alternatively, the set of power control parameters may be one or more of the following sets: a set of open loop power control parameters on the PUSCH, a set of reference signal groups for estimating path loss on the PUSCH, or a set of accumulated feedback process numbers.

The PUSCH open-loop power control parameter set comprises one or more open-loop power control parameter groups composed of a basic power control parameter P0 and a path loss compensation factor alpha; the set of reference signal groups for estimating path loss of the PUSCH contains one or more reference signal indices qd for estimating path loss, and the set of accumulated feedback process numbers contains one or more accumulated feedback process numbers l.

In one possible embodiment, each group, the first group of power control parameters and the second group of power control parameters, contains at least one of the following: basic power control parameter P0, path loss compensation factor alpha, index qd of the reference signal for estimating path loss. path or the number l of accumulated processes with feedback.

According to a second aspect, a method for controlling transmission power in an uplink is provided. This method is implemented by the network device or may be implemented by an integrated circuit (chip) in the network device. The following is a description using an example in which the agent is a network device. This network device transmits the first indication information to the terminal device, where this first indication information indicates the first precoding information and the second precoding information, the first precoding information corresponds to the first group of power control parameters for the first repetition of the physical uplink shared channel (physical uplink shared channel ( PUSCH)), and the second precoding information corresponds to the second group of power control parameters for the second repetition of the PUSCH; and the network device receives the first repetition of the PUSCH from the terminal device based on the first precoding information.

In one embodiment, the network device may send to the terminal device second indication information, where the second indication information indicates the first power control parameter group and the second power control parameter group in the power control parameter set. According to the above embodiment, the network device may indicate the precoding information through the first indication information, and indicate the power control parameter through the second indication information. The first indication information and the second indication information do not affect each other, which creates a flexible indication method.

In one possible embodiment, the first indication information further indicates the first group of power control parameters and the second group of power control parameters. According to the above embodiment, the network device may indicate both the precoding information and the power control parameter through the same indication information segment. Compared to today's technology, signaling costs can be reduced.

In one possible embodiment, the network device may determine, from a set of power control parameters in accordance with a predetermined rule, a first group of power control parameters corresponding to the first precoding information. Optionally, this predefined rule contains: either of the two power control parameter groups with the lowest indices in the power control parameter set is the first power control parameter group. As described above, the signaling overhead is reduced because the network device does not need to further specify the power control parameter.

In one possible embodiment, the set of power control parameters contains at least one of the following sets: a set of open-loop power control parameters in the PUSCH channel, a set of reference signal groups for estimating path losses in the PUSCH channel, or a set of numbers of accumulated processes with feedback, where the PUSCH open-loop power control parameter set comprises one or more open-loop power control parameter groups composed of the basic power control parameter P0 and the path loss compensation factor alpha, the set of reference signal groups for estimating the PUSCH path loss comprises one or more indices qd of reference signals for estimating path loss, and the set of numbers of accumulated feedback processes contains one or more numbers l of accumulated feedback processes.

In one possible embodiment, each of the groups - the first group of power control parameters and the second group of power control parameters, contains at least one of the following: basic power control parameter P0, path loss compensation coefficient alpha, index qd of the group of reference signals for evaluation path losses and the number l of accumulated feedback processes.

According to a third aspect, a method for controlling transmission power in an uplink is provided. For information on beneficial effects, please refer to the description of the first aspect. The communication equipment has the functions of implementing the behavior in accordance with the embodiment of the method according to the first aspect. These functions may be implemented by the hardware running the associated software. This hardware or software contains one or more modules corresponding to the above functions. In one possible embodiment, the communication equipment comprises: a transceiver module configured to receive first indication information from a network device, where this first indication information indicates first precoding information and second precoding information, the first precoding information corresponds to the first repetition of the physical uplink shared the PUSCH, and the second precoding information corresponds to the second repetition of the PUSCH; a processing unit configured to determine a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information; determining a first transmission power based on a first group of power control parameters, and transmitting a first PUSCH repetition based on the first transmission power and the first precoding information; and determining a second transmission power based on the second group of power control parameters, and transmitting a second repetition of the PUSCH based on the second transmission power and the second precoding information. These modules may perform the respective functions in the exemplary methods according to the first aspect. For details, refer to the detailed description of method examples. The details will not be re-described here.

According to a fourth aspect, a communication apparatus is provided. For information on beneficial effects, please refer to the description of the second aspect. The details will not be re-described here. This communication equipment has the functions of implementing the behavior according to the method examples according to the second aspect. These functions may be implemented in hardware or may be implemented in hardware running the associated software. This hardware or software contains one or more modules corresponding to the above functions. In one possible embodiment, the communication apparatus comprises: a communication module configured to transmit first indication information to the terminal device, where this first indication information indicates first precoding information and second precoding information, the first precoding information corresponds to the first group of power control parameters for the first repetitions of the physical uplink shared channel (PUSCH), and the second precoding information corresponds to the second group of power control parameters for the second repetition of the PUSCH; and a processor module configured to receive a first repetition of the PUSCH from the terminal device based on the first precoding information for controlling the communication module. These modules may perform the respective functions of the method examples according to the second aspect. For details, refer to the detailed description of method examples. The details will not be re-described here.

According to a fifth aspect, communication equipment is provided. This communication equipment may be a terminal device in the above embodiments, or an integrated circuit (chip) located in such a terminal device. This communication equipment contains a communication interface and a processor, and as an option, additionally contains a memory device. This storage device is configured to store a computer program or instructions. The processor is connected to a storage device and a communication interface. When the processor executes the specified computer program or instructions, the communication equipment may implement the methods implemented by the terminal device in the above method embodiments.

According to the sixth aspect, communication equipment is provided. This communication equipment may be a network device in the above embodiments of the method or an integrated circuit (chip) located in such a network device. This communication equipment contains a communication interface and a processor, and as an option, additionally contains a memory device. This storage device is configured to store a computer program or instructions. The processor is connected to a storage device and a communication interface. When the processor executes the specified computer program or instructions, the communication equipment may implement the methods implemented by the network device in the above embodiments of the method.

According to the seventh aspect, a computer program product is provided. This computer program product contains computer program code. By executing this computer program code, the methods implemented by the terminal device according to the above aspects can be implemented.

According to the eighth aspect, a computer program product is provided. This computer program product contains computer program code. By executing this computer program code, the methods implemented by the network device according to the above aspects can be implemented.

According to the ninth aspect, the present application proposes a system based on an integrated circuit (chip). This integrated circuit (chip) based system comprises a processor configured to perform the functions performed by the terminal devices in the methods according to the above aspects. In one embodiment, the integrated circuit (chip) based system further comprises a storage device configured to store program instructions and/or data. Such an integrated circuit system may comprise an integrated circuit (chip) or may comprise an integrated circuit (chip) and another discrete component.

According to the tenth aspect, the present application proposes a system based on an integrated circuit (chip). This system based on an integrated circuit (chip) contains a processor configured to perform the functions performed by the network device in the methods according to the above aspects. In one embodiment, the integrated circuit (chip) based system further comprises a storage device configured to store program instructions and/or data. Such an integrated circuit system may comprise an integrated circuit (chip) or may comprise an integrated circuit (chip) and another discrete component.

According to an eleventh aspect, the present application provides a computer-readable storage medium that stores a computer program. When this computer program is executed, the methods implemented by the terminal device according to the above aspects are implemented.

According to a twelfth aspect, the present application provides a computer-readable storage medium that stores a computer program. When this computer program is executed, the methods implemented by the network device according to the above aspects are implemented.

Brief description of the drawings

Fig. 1 and FIG. 2 represent each simplified PUSCH repetition transmission scheme according to one embodiment of the present application;

fig. 3 is a simplified diagram of a network architecture according to one embodiment of the present application;

fig. 4, fig. 5, fig. 6 and FIG. 7 represent each communication method logic according to one embodiment of the present application; And

fig. 8 and FIG. 9 each represent a simplified diagram of the communications equipment according to one embodiment of the present application.

Description of options

First, concepts or terms used in embodiments of the present application and also used as part of the present invention are considered.

1. Terminal device

A terminal device may be briefly referred to as a terminal or referred to as a user equipment (user equipment, UE), and is a device having a radio transceiver function. Such a terminal device may be deployed on the ground, where this deployment option covers indoor or outdoor deployment, handheld or vehicle (vehicle) deployment, may be deployed on water (e.g., on a ship), or may be deployed in the air (for example, on an aircraft, on an unmanned aerial vehicle, on a balloon or on a satellite). The terminal device can be a mobile phone, a tablet computer, a computer with a radio transceiver function, a virtual reality terminal device, an augmented reality terminal device, a wireless (radio) terminal device in an industrial production control system, a wireless (radio) device of a terminal in an unmanned systems control system , wireless (radio) terminal device in telemedicine, wireless (radio) terminal device in intelligent network, wireless (radio) terminal device in transport security system, wireless (radio) terminal device in smart city, wireless (radio) device smart home terminal or other similar device. The terminal device may be fixed or mobile. In the embodiments of the present application, this is not limited.

In embodiments of the present application, hardware configured to perform terminal functions may be a terminal device, or may be hardware, such as an integrated circuit (chip) based system, that can support a terminal device in performing those functions. This equipment may be installed in the terminal device. In this embodiment of the present application, an integrated circuit-based system may comprise an integrated circuit (chip) or may comprise an integrated circuit (chip) and another discrete component. The technical solutions proposed in the embodiments of the present application are described using an example in which the equipment configured to perform the functions of a terminal device is a terminal device.

2. Network device

The network device may be a network access device. This network access device may also be referred to as a radio access network (RAN) device, and is a device that provides a radio function for a terminal device. The network access device is, for example, and not limited to, a next generation NodeB node (generation NodeB, gNB), an evolved NodeB node (evolved NodeB, eNB), a baseband unit (BBU), a transmitting and receiving point (transmitting and receiving point, TRP) or a transmitting point (TP) in a 5G network, a base station in a mobile communications system of the future, or an access point in a Wi-Fi system. Alternatively, the network access device may be a radio controller, a central unit (CU), and/or a distributed unit (DU) in a cloud radio access network (CRAN) scenario, or a network device may be a relay station, a device installed on a vehicle (car), a network device in an advanced public land mobile network (PLMN) of the future, or in another similar communication network.

A terminal device may communicate with multiple network access devices using different technologies. For example, a terminal device may communicate with a network access device that supports the Long Term Evolution (LTE) standard, may communicate with a network access device that supports 5G technology, or may also communicate with a network access device that supports 5G technology. LTE, and with a network access device that supports 5G technology. In the embodiments of the present application, this is not limited.

In embodiments of the present application, hardware configured to perform the functions of a network device may be a network device, or may be hardware, such as a system based on an integrated circuit (chip), that can support the network device in performing these functions. This equipment can be installed in a network device. The technical solutions proposed in the embodiments of the present application are described using an example in which the equipment configured to perform the functions of a network device is a network device.

3. Configured grant (CG) uplink (uplink, UL)

The configured uplink grant means that uplink transmissions from the terminal device are performed without requiring scheduling from the network device, but instead, the terminal device performs uplink transmissions based on the configuration information.

Uplink configured grant based transmission is also referred to as grant free (GF) or scheduling-free uplink transmission. The uplink configured grant can be of two types: type-1 configured uplink grant and type-2 configured uplink grant. The difference is that all parameters of the type-1 configured uplink grant are pre-configured by the network device. Therefore, when transmitting uplink service data using a type-1 configured uplink grant, the terminal device directly uses the parameters configured by the network device without requiring additional scheduling information. However, when transmitting uplink service data using the configured type-2 uplink grant, the terminal apparatus performs uplink data transmissions using the optionally received start information segment. This trigger information may be downlink control information (DCI) or the like.

For type-1 and type-2 configured uplink grants, information of one or more of the following list may be preconfigured using a higher layer parameter:

frequency hopping mode, demodulation reference signal (DMRS) configuration, modulation and coding scheme (MCS) table selection, frequency domain resource assignment mode selection, resource block group size configuration selection, RBG) for physical uplink shared channel (PUSCH), power control loop selection, open loop power control parameters (including target signal-to-noise ratio and path loss compensation factor), number of hybrid automatic retransmission request processes (hybrid automatic repeat request, HARQ), number of retransmissions, sequence of redundancy versions, and periodicity.

Further, for a type-1 configured uplink grant, in addition to one or more of the types of information from the above list, the configuration information may further comprise:

frequency domain resource assignment, time domain offset, antenna port, precoding information, number of layers, sounding reference signal (SRS) resource indication, modulation order, target data bit rate, transport block size, hopping offset frequency, reference signal index for path loss estimation, beta offset indication, and other such information.

For a configured type-2 uplink grant, resource allocation is performed based on the configuration of the above higher layer parameter.

In addition, the terminal device performs an unscheduled transmission only after receiving the start information.

4. Repeat PUSCH

The PUSCH repetition may mean that the network device transmits one uplink grant indication or one uplink grantless indication to indicate one or more transmissions of nominal PUSCH repetitions. After receiving an uplink grant indication or an uplink grantless mode indication, the terminal device transmits one or more actual PUSCH repetitions in one slot, or transmits two or more actual PUSCH repetitions in multiple consecutive available slots based on the uplink grant indication or an indication of a grantless uplink mode. In the current embodiment of the present application, an example is used for description in which two actual repetitions of the PUSCH are transmitted.

, и каждая из величин S и L обозначена 4 битами в сигнализации более высокого уровня. Можно реализовать S + L > 14. Размеры транспортных блоков (transport block size (TBS)) номинальных и фактических повторений канала PUSCH определяют на основе продолжительности L номинального канала PUSCH во временной области. Начиная со 2-го номинального канала PUSCH, стартовый символ номинального повторения канала PUSCH следует за конечным символом предыдущего номинального повторения канала PUSCH.The network device adds a column to the time domain resource assignment table to indicate the number of repetitions of PUSCH type B (number of repetition) transmitted. This number can be equal to {1, 2, 3, 4, 7, 8, 12, 16}. The uplink scheduling signaling or first type grantless configuration information indicates a start symbol S and a duration L of the 1st nominal PUSCH, and the duration L of all nominal PUSCH repetitions is the same, where 0 ≤ S ≤ 13.1 ≤ L ≤ 14,

, and each of the values S and L is denoted by 4 bits in the higher layer signaling. S + L > 14 can be implemented. The transport block size (TBS) of the nominal and actual PUSCH repetitions is determined based on the length L of the nominal PUSCH in the time domain. Starting from the 2nd nominal PUSCH, the start symbol of the nominal PUSCH repetition follows the end symbol of the previous nominal PUSCH repetition.

Before determining the time domain resource for actually repeating the PUSCH, the terminal device needs to determine an invalid symbol. The terminal device detects an invalid character as follows.

A downlink symbol semi-statically configured using a higher level option (eg, tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated) is an invalid symbol.

A character-level bitmap configured with a higher-level parameter (eg, InvalidSymbolPattern) and a bit value of 1 indicates that the corresponding character is invalid. When the DCI information in format 0_1 or 0_2 schedules a PUSCH repetition, or a second type grantless repetition of a PUSCH is activated, and a 1-bit indication information field with an invalid symbol structure is configured in the DCI information, when the value of this indication information field with an invalid symbol structure is 1 , the terminal device applies the invalid character structure; otherwise, the terminal device ignores the invalid character structure. If the DCI information does not contain an indication information field with an invalid symbol structure, the terminal device directly applies the invalid symbol structure based on the configuration of the higher-level InvalidSymbolPattern parameter. The indication information field with the invalid character structure is independently configured for different DCI information formats.

After the terminal device determines an invalid symbol in the time domain resource of each nominal PUSCH based on the Type B repetition of the PUSCH, the remaining symbol can be considered a potentially valid symbol. If the number of consecutive potentially valid nominal PUSCH symbols in a slot is greater than 0, one actual PUSCH repetition may be mapped, and the set of time domain resources for one nominal PUSCH repetition may contain time domain resources for one or more actual PUSCH repetitions. The terminal device does not transmit an actual one-symbol PUSCH repetition unless that one symbol has a nominal PUSCH duration L specified by the network device.

For a Grantless PUSCH Type B repetition, if a dynamic slot format indicator (SFI) is received within the total duration of the actual PUSCH repetition, and a conflict occurs between the actual PUSCH repetition and the dynamic downlink or soft symbol, the actual PUSCH repetition does not transferable; or if a dynamic SFI is received in at least one symbol within the duration of the actual PUSCH repetition, and a collision occurs between the actual PUSCH repetition and at least one semi-static soft symbol, the actual PUSCH repetition is not to be transmitted.

To improve the reliability of transmissions of the URLLC communication service, the following technical solution is proposed: Two transmitting and receiving points (transmission reception point, TRP) jointly process and receive the PUSCH channel to improve the reliability of the PUSCH transmissions. The procedure may be as follows: TRP #1 sends an uplink grant (UL grant) to the UE, and the UE sends the first PUSCH retry and the second PUSCH retry to TRP #1 and TRP #2, respectively. Optionally, the first repetition of the PUSCH corresponds to the first precoding information, and the second repetition of the PUSCH corresponds to the second precoding information. The different precoding information may contain indications of different transmission beams (corresponding to analog precoding mechanisms, where the UE changes the transmission beam by changing the phase shifter), different antenna ports, different antenna virtualization methods (corresponding to digital precoding mechanisms, where the UE generates different transmission beams based on digital weighting coefficients characterizing the distribution of the signal between different antennas) or other similar factors.

As shown in FIG. 1, the first PUSCH repetition and the second PUSCH repetition occupy the same time domain resource but different frequency domain resources. For example, the first repetition of the PUSCH may occupy the first frequency domain resource, and the second repetition of the PUSCH may occupy the second frequency domain resource. Alternatively, as shown in FIG. 2, the first PUSCH repetition and the second PUSCH repetition may occupy the same frequency domain resource but different time domain resources. For example, the first PUSCH repetition may occupy the first time domain resource, and the second PUSCH repetition may occupy the second time domain resource.

In this solution, the first PUSCH repetition and the second PUSCH repetition correspond to the same power control parameter group, which means that the first PUSCH repetition and the second PUSCH repetition correspond to the same transmission power. Since the distances from different TRPs to the UE are different and the communication channel conditions are also different, it is incorrect to calculate the transmission power of two PUSCH repetitions using the same power control parameter. This adversely affects the transmission characteristics of the PUSCH repetitions and further reduces the reliability of such transmission of the PUSCH repetitions.

In FIG. 3 is a simplified diagram of a network architecture including a terminal device 110 and a network access device 120. The terminal device 110 and the network access device 120 may communicate with each other via the radio interface Uu. The radio interface Uu can be understood as a universal UE to network interface. The set of transmissions over the radio interface Uu comprises uplink transmissions and downlink transmissions.

The term "uplink transmission" means that the terminal device 110 transmits uplink information to the network access device 120. Such uplink information may include one or more of the following kinds of information: uplink data information, uplink control information, and a reference signal (RS). The channel for transmitting uplink information is called an uplink channel and may be a PUSCH or a physical uplink control channel (PUCCH). The PUSCH is used to transmit uplink data, where uplink data may also be referred to as uplink data information. The PUCCH is used to transmit uplink control information (UCI) feedback from the terminal device. The UCI information may contain channel state information (CSI), acknowledgment (ACK) or negative acknowledgment (NACK), and other such information. The term "downlink transmission" means that the network access device 120 transmits downlink information to the terminal device 110. Such downlink information may include one or more of the following kinds of information: downlink data information, downlink control information, and downlink reference signal. The downlink reference signal may be a channel state information reference signal (CSI-RS) or a phase tracking reference signal (PTRS). A channel for transmitting downlink information is called a downlink. The downlink can be a physical downlink shared channel (PDSCH) or a physical downlink control channel (PDCCH). The PDCCH is used to transmit downlink control information (DCI). The PDSCH is used to transmit downlink data, which may also be referred to as downlink data information.

As an option, the network architecture shown in FIG. 3 may further comprise a backbone network device 130. The terminal device 110 may be wirelessly (radio) connected to the network access device 120, and the network access device 120 may be connected to the backbone network device 130 in a wired or wireless manner. Further, the network architecture may comprise another network device such as a radio relay device and a radio backhaul network device. In the present application, this is not limited. The network access device 120 and the backbone network device 130 may be different independent physical devices. Alternatively, the network access device 120 and the backbone network device 130 may be the same physical device, where all or some of the logical functions of the backbone network device 130 and the network access device 120 are integrated in the physical device.

In embodiments of the present application, the number of backbone network devices, network access devices, and terminal devices included in the network architecture shown in FIG. 3, not limited. For example, the network architecture may comprise one backbone network device, two radio access network devices, and one terminal device, where both of these radio access network devices can serve one terminal device. The two access radio network devices may be TRP #1 and TRP #2. In this application, TRP #1 and TRP #2 may be two gNBs, or may be two DUs in a CU-DU architecture, or may be two remote radio units (RRUs) in a gNB.

Embodiments of the present application provide a method and apparatus for controlling the power of uplink transmissions. The principle of the method is as follows: The terminal apparatus calculates the transmission power of the first repetition of the PUSCH and the transmission power of the second repetition of the PUSCH using two groups of different power control parameters, respectively. Compared with the method of calculating the transmission power of the first repetition of the PUSCH and the transmission power of the second repetition of the PUSCH using the same group of power control parameters, the proposed method can improve the transmission performance of the PUSCH repetition and improve the transmission reliability of the PUSCH repetitions.

In FIG. 4 is a flow chart of a method for controlling transmission power in an uplink. This method may be implemented by the terminal device and the network device, or it may be implemented by an integrated circuit (chip) in the terminal device and an integrated circuit (chip) in the network device. This method contains the following steps.

S601: The network device transmits the first indication information to the terminal device, where the first indication information indicates the first precoding information and the second precoding information, the first precoding information corresponds to the first repetition of the PUSCH, and the second precoding information corresponds to the second repetition of the PUSCH. Accordingly, the terminal device receives this first indication information.

, а вторая матрица предварительного кодирования может быть

.For example, the network device may indicate two segments of precoding information out of N segments of precoding information via the first indication information. These two precoding information segments are first precoding information and second precoding information. Here, N is an integer greater than 2, and the N segments of precoding information may be defined by a protocol, or may be preconfigured by a network device for a terminal device. The precoding information may be a precoding matrix, and the first indication information may be a transmitted precoding matrix indicator (TPMI). When N is 6, the correspondence between the six precoding matrices and the TPMIs is shown in Table 1. For example, when the TPMIs transmitted in the first indication information are 0 and 1, the first precoding matrix may be

, and the second precoding matrix may be

.

Table 1

TPMI index Precoding Matrix 0–5

S602: The terminal apparatus determines a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information.

The first power control parameter group and the second power control parameter group are two power control parameter groups in the power control parameter set. In one example, the set of power control parameters may comprise at least one of the following sets: a set of open loop power control parameters on a PUSCH, a set of reference signal groups for estimating path loss on a PUSCH, or a set of accumulated closed loop process numbers. . The PUSCH open-loop power control parameter set contains one or more open-loop power control parameter groups formed from the basic power control parameter P0 and the path loss compensation coefficient alpha, the set of reference signal groups for estimating the PUSCH path loss contains one or several indices qd of reference signals for estimating path loss, and the set of numbers of accumulated feedback processes contains one or more numbers l of accumulated feedback processes. The power control parameter set may be predefined by the protocol, or may be preconfigured by the network device to the terminal device. In the present application, this is not limited.

In one possible implementation, the network device may send, to the terminal device, second indication information indicating the first power control parameter group and the second power control parameter group. The terminal apparatus may determine, from the set of power control parameters based on the second indication information, the first power control parameter group corresponding to the first precoding information and the second power control parameter group corresponding to the second precoding information. Alternatively, the terminal apparatus may determine, from a set of power control parameters according to a predefined rule, a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information. This predetermined rule determines: the two power control parameter groups with the smallest indices in the power control parameter set are the first power control parameter group and the second power control parameter group. For example, the power control parameter group with the lowest index may be the first power control parameter group, and the power control parameter group with the second lowest index may be the second power control parameter group. Alternatively, the power control parameter group with the second lowest index may be the first power control parameter group, and the power control parameter group with the lowest index may be the second power control parameter group. Alternatively, the first indication information further indicates the first power control parameter group and the second power control parameter group. The terminal apparatus may determine the first power control parameter group and the second power control parameter group from the power control parameter set based on the first indication information.

In one possible implementation, the power control parameter set contains only the open loop power control parameter set on the PUSCH. The first power control parameter group and the second power control parameter group may be, in particular, the first open-loop power control parameter group and the second open-loop power control parameter group. The specific procedure may be as follows.

The network device may preconfigure a set of open loop power control parameters on the PUSCH for the terminal device using a higher layer parameter (eg, parameter p0-AlphaSets). This set contains several groups of open loop power control parameters, and each group of open loop power control parameters corresponds to one identifier (identifier, ID). For example, the PUSCH open-loop power control parameter set contains four open-loop power control parameter groups with identifiers 0, 1, 2, and 3: (P0_0, alpha_0), (P0_1, alpha_1), (P0_2, alpha_2) and (P0_3, alpha_3). The network device may transmit the second indication information to the terminal device, where the second indication information may carry the identifiers of the two open loop power control parameter groups. The terminal apparatus may determine the first open-loop power control parameter group and the second open-loop power control parameter group based on said identifiers of the two open-loop power control parameter groups. For example, if the identifiers conveyed in the second indication information are 0 and 1, then (P0_0, alpha_0) corresponding to identifier 0 is the first power control parameter group, and (P0_1, alpha_1) corresponding to identifier 1 is the second parameter group. power control. Alternatively, (P0_0, alpha_0) corresponding to ID 0 is the second power control parameter group, and (P0_1, alpha_1) corresponding to ID 1 is the first power control parameter group. In the present application, this is not limited. Such an indication procedure of the first power control parameter group and the second power control parameter group via the first indication information is similar to the above procedure. This will not be considered further here. Alternatively, the manner in which the terminal device selects the first power control parameter group and the second power control parameter group from a set of open-loop power control parameters on the PUSCH may be predetermined by the protocol. For example, the power control parameter group with the lowest ID, in other words, (P0_0, alpha_0), is the first power control parameter group, and the power control parameter group with the second lowest ID, in other words, (P0_1, alpha_1), is the second control parameter group. power. Alternatively, the power control parameter group with the second smallest ID, in other words, (P0_1, alpha_1), is the first power control parameter group, and the power control parameter group with the lowest ID, in other words, (P0_0, alpha_0), is the second group. power control parameters.

In one possible implementation, the set of power control parameters contains only the set of reference signal groups for estimating the path loss of the PUSCH. The first power control parameter group and the second power control parameter group may specifically be a first reference signal group for path loss estimation and a second reference signal group for path loss estimation. Each group of reference signals for estimating path loss may contain one or more synchronization signal blocks (synchronization signal block, SSB) and/or one or more CSI-RS signals. The specific procedure may be as follows.

The network device may configure a set of reference signal groups for estimating PUSCH path loss for the terminal device using a higher layer parameter (eg, pathlossReferenceRSToAddModList parameter). The PUSCH pathloss estimation reference signal group set comprises one or more such pathloss estimation reference signal groups, and each pathloss estimation reference signal group corresponds to one identifier. The network device may send the second indication information to the terminal device, where the second indication information may carry identifiers of two reference signal groups for path loss estimation. The terminal apparatus may determine the first reference signal group for path loss estimation and the second group of reference signals for path loss estimation according to the identifiers of the two reference signal groups for path loss estimation. The procedure for determining the first reference signal group for path loss estimation and the second reference signal group for path loss estimation based on the first indication information is similar to the above procedure. This is not considered further here. Alternatively, the terminal apparatus may determine the first group of reference signals for path loss estimation and the second group of reference signals for path loss estimation based on a predetermined protocol. For example, the path loss reference group with the lowest index, in other words, PUSCH-PathlossReferenceRS-0, may be the first path loss estimation reference signal group, and the path loss estimation reference signal group with the second lowest index, otherwise In other words, PUSCH-PathlossReferenceRS-1 may be the second group of reference signals for path loss estimation. Alternatively, the path loss estimation reference group with the second lowest index, in other words, PUSCH-PathlossReferenceRS-1, may be the first path loss estimation reference signal group, and the path loss estimation reference signal group with the lowest index , in other words, PUSCH-PathlossReferenceRS-0, may be the second group of reference signals for path loss estimation. In the present application, this is not limited.

When the power control parameter set contains multiple parameter sets, the terminal apparatus may determine the corresponding power control parameters from the multiple sets, respectively, to obtain the first power control parameter group and the second power control parameter group. For example, the first indication information or the second indication information may carry two identifiers. The terminal apparatus may determine, from the plurality of sets, power control parameters related to these two identifiers, respectively, to form a first power control parameter group and a second power control parameter group. For example, the power control parameter set comprises a PUSCH open-loop power control parameter set and a set of reference signal groups for estimating the PUSCH path loss. If the identifiers transmitted in the first indication information and the second indication information are 0 and 1, the terminal apparatus may determine (P0_0, alpha_0) and (P0_1, alpha_1) in the PUSCH open loop power control parameter set based on the identifiers 0 and 1. Similarly, the terminal device may determine PUSCH-PathlossReferenceRS-0 and PUSCH-PathlossReferenceRS-1 in the set of reference signal groups for estimating PUSCH path loss based on identifier 0 and identifier 1. The first group of power control parameters may contain {P0_0, alpha_0, PUSCH -PathlossReferenceRS-0}, and the second group of power control parameters may contain {P0_1, alpha_1 PUSCH-PathlossReferenceRS-1}. Alternatively, the first power control parameter group may comprise {P0_1, alpha_1, PUSCH-PathlossReferenceRS-1} and the second power control parameter group may comprise {P0_0, alpha_0 PUSCH-PathlossReferenceRS-0}. In the present application, this is not limited. Alternatively, the terminal apparatus may determine different power control parameters in different sets according to a predetermined rule to form the first power control parameter group and the second power control parameter group. Just as in the example above, the power control parameter set comprises a PUSCH open-loop power control parameter set and a set of reference signal groups for estimating the PUSCH path loss. The terminal device may determine, from a set of open loop power control parameters in the PUSCH according to a predetermined rule, the power control parameter (P0_0, alpha_0) with the smallest index and the power control parameter (P0_1, alpha_1) with the second smallest index. The terminal apparatus determines, from a set of reference signal groups for PUSCH path loss estimation, a PUSCH-PathlossReferenceRS-0 reference signal for pathloss estimation with the smallest index, and a PUSCH-PathlossReferenceRS-1 reference signal for pathloss estimation with the second lowest index. Finally, {P0_0, alpha_0, PUSCH-PathlossReferenceRS-0} constitutes the first power control parameter group, and {P0_1, alpha_1 PUSCH-PathlossReferenceRS-1} constitutes the second power control parameter group; or vice versa. In the present application, this is not limited.

It should be noted that in the above example, a case has been described in which power control parameters with the same indices are defined in multiple parameter sets to constitute the first power control parameter group and the second power control parameter group. Of course, in these multiple sets, power control parameters with different indices may be defined to constitute the first power control parameter group and the second power control parameter group. In this case, in the first indication information or the second indication information, it is necessary to indicate the ID of the power control parameters corresponding to the first indication information or the second indication information in each set. Optionally, the first indication information or the second indication information may contain identifiers of different sets. Still in the above example, the power control parameter set comprises a PUSCH open-loop power control parameter set and a set of reference signal groups for estimating the PUSCH path loss. To facilitate the following description, the PUSCH power control parameter set ID may be set to 0, and the PUSCH pathloss reference signal group set ID may be set to 1. The first indication information or the second indication information may comprise a set 0, the first identifier and the second identifier in set 0, set 1, and the third identifier and fourth identifier in set 1. The terminal device may determine two groups of open loop power control parameters in set 0 based on the first identifier and the second identifier. Similarly, the terminal device may determine two groups of reference signals for path loss estimation in set 1 based on the third identifier and the fourth identifier. Finally, the first power control parameter group and the second power control parameter group are respectively constituted based on said two open-loop power control parameter groups and two path loss estimation reference signal groups. Similarly, in the exemplary embodiment of the present application, predetermined rules may be set in sets to determine power control parameters corresponding to those sets to constitute a first power control parameter group and a second power control parameter group.

S603: The terminal device determines the first transmission power based on the first power control parameter group, and transmits the first repetition of the PUSCH to the network device based on this first transmission power and the first precoding information. Accordingly, the network device may receive this first PUSCH repetition based on the first precoding information.

S604: The terminal device determines the second transmission power based on the second group of power control parameters, and transmits the second repetition of the PUSCH to the network device based on the second transmission power and the second precoding information. Accordingly, the network device may receive a second repetition of the PUSCH based on the second precoding information. The relationship between the time-frequency resources occupied by the first PUSCH repetition and the second PUSCH repetition may be as follows: The time domain resources are the same, and the frequency domain resources do not overlap; or the frequency domain resources are the same and the time domain resources do not overlap.

Optionally, the procedure in which the terminal device determines the first transmission power based on the first group of power control parameters or the terminal device determines the second transmission power based on the second group of power control parameters may satisfy the following condition:

представляет базовый параметр управления мощностью без обратной связи,

представляет ширину полосы частот, занимаемой каналом PUSCH,

представляет коэффициент компенсации потерь в тракте (указанный выше коэффициент alpha),

представляет потери в тракте, измеренные на основе группы

опорных сигналов для оценки потерь в тракте,

представляет величину регулирования схемы MCS для передач канала PUSCH, и f_b, f_,c(i, l) представляет величину регулирования мощности с обратной связью и управляется информацией DCI. Далее,

может удовлетворять следующим условиям:P_ _PUSCH,b , f _,c (i, j, q _d , l) represents the first transmit power or the second transmit power, P _CMAX , f _,c (i) represents the maximum transmit power of the terminal device,

represents the basic open loop power control parameter,

represents the bandwidth occupied by the PUSCH,

represents the path loss compensation factor (alpha above),

represents the path loss measured on a group basis

reference signals for estimating path losses,

represents the MCS control amount for PUSCH transmissions, and f _b , f _,c (i, l) represents the closed loop power control amount and is controlled by the DCI information. Further,

may satisfy the following conditions:

=

+

, где

=

+

, Where

представляет базовый параметр управления мощностью без обратной связи,

представляет базовый параметр управления мощностью (указанный выше параметр P0), и

представляет параметр управления мощностью, конфигурированный с использованием параметра более высокого уровня.

represents the basic open loop power control parameter,

represents the basic power control parameter (parameter P0 above), and

represents the power control parameter configured using the higher layer parameter.

Note that in the above two formulas, b represents the uplink bandwidth part (BWP), f represents the carrier, c represents the serving cell, i represents the PUSCH transmission case, j represents the parameter set configuration index, l represents an index of regulation in closed loop power control, and qd represents an index of a group of reference signals for estimating path loss.

In one possible implementation, the network device shown in FIG. 6 may include a first TRP and a second TRP. In particular, the first TRP may transmit the first indication information and/or the second indication information to the terminal device. This terminal device may send the first PUSCH repetition to the first TRP and send the second PUSCH repetition to the second TRP.

From the foregoing, it can be understood that in the present embodiment of the present application, different groups of power control parameters may be defined for different repetitions of the PUSCH. For example, the first repetition of the PUSCH corresponds to the first group of power control parameters, and the transmission power of this first repetition of the PUSCH is determined based on the first group of power control parameters. The second repetition of the PUSCH corresponds to the second group of power control parameters, and the transmission power of this second repetition of the PUSCH is determined based on the second group of power control parameters. Compared with the method of determining the transmission power of the first repetition of the PUSCH and the transmission power of the second repetition of the PUSCH based on the same group of power control parameters, such a method can improve the characteristics of the repetition of the PUSCH, and further improve the reliability of such repetition of the PUSCH.

In FIG. 5 is a logic diagram of the uplink control method. The procedure may be the procedure shown in FIG. 6 and be applicable to an example of a scheduling-based PUSCH. This procedure contains the following steps.

S701: The first TRP transmits downlink control information (DCI) to the UE, where this DCI information indicates to the UE to transmit the PUSCH repetition to at least two TRPs. For example, the UE transmits the first PUSCH repetition to the first TRP and transmits the second PUSCH repetition to the second TRP.

The DCI information may comprise a first information field indicating precoding information corresponding to a PUSCH transmission. For example, the first information field indicates first precoding information and second precoding information. The first precoding information corresponds to the first repetition of the PUSCH, and the second precoding information corresponds to the second repetition of the PUSCH. The first PUSCH repetition and the second PUSCH repetition are transmitted in the same transport block. The redundancy versions corresponding to the first PUSCH repetition and the second PUSCH repetition are the same or different. Optionally, the first information field may further contain an indication of the number of levels in addition to the precoding information.

In one possible implementation, the DCI information may alternatively comprise a second information field indicating a first power control parameter group and a second power control parameter group. Each of these groups, the first group of power control parameters and the second group of power control parameters, may contain at least one of the following: basic power control parameter P0, path loss compensation factor alpha, reference signal group index qd for estimating path loss, and the number l of accumulated processes with feedback. Optionally, the power control parameters included in the first power control parameter group and the power control parameters included in the second power control parameter group are the same type of parameters. For example, if the first group of power control parameters contains P0, alpha and qd, the second group of power control parameters also contains P0, alpha and qd. Similarly, if the first group of power control parameters contains only P0 and alpha, the second group of power control parameters also contains only P0 and alpha. The second information field may be a resource indication for the SRS signal.

In another possible implementation, the DCI information may not contain the second information field, and the terminal device may select, using a predefined rule and from a set of power control parameters configured using a higher layer parameter, two groups of power control parameters: the first group of control parameters power and a second group of power control parameters.

In another possible implementation, the first information field may contain a resource indication for the SRS signal, and this first information field further indicates the first group of power control parameters and the second group of power control parameters. The terminal apparatus may determine the first power control parameter group and the second power control parameter group based on the first indication information. Details of the procedure by which the terminal device selects two groups of power control parameters based on the second information field, the predefined rule, or the first information field are given in the description of FIG. 6. Additional description will not be given here.

S702: The terminal apparatus determines the transmission power of the first PUSCH repetition based on the first power control parameter group, and transmits the first PUSCH repetition to the first TRP based on the first precoding information.

S703: The terminal apparatus determines the transmission power of the second PUSCH repetition based on the second power control parameter group, and transmits the second PUSCH repetition to the second TRP based on the second precoding information.

From the above discussion, it can be understood that the terminal apparatus can determine two groups of power control parameters based on the scheduling of one segment of DCI information. In addition, the transmission power of the first repetition of the PUSCH and the transmission power of the second repetition of the PUSCH can be respectively determined based on the found two groups of power control parameters, so that the transmission powers of the PUSCHs transmitted to different TRPs are determined using independent power control parameters. With this approach, the transmission parameter and transmission power of the PUSCH are more adaptive to the channel in which the PUSCH is located, thereby improving transmission reliability and transmission performance.

In FIG. 6 is a flow diagram of a method for controlling the power of uplink transmissions. This procedure may be an example in which the method shown in FIG. 6 applies to the type-1 configured uplink grant for the PUSCH. This procedure contains the following steps.

S801: The first TRP transmits the first configuration information to the UE, where this first configuration information may be a configured uplink grant for radio resource control (RRC) or a configured grant (configured grant). configuration). The first configuration information may indicate to the UE that PUSCH repetitions should be sent to at least two TRPs. For example, the UE is instructed to send the first PUSCH repetition to the first TRP and to send the second PUSCH repetition to the second TRP.

In one embodiment, the first configuration information may comprise a first parameter, where the first parameter may indicate first precoding information and second precoding information. The first precoding information corresponds to the first repetition of the PUSCH, and the second precoding information corresponds to the second repetition of the PUSCH. Optionally, the first configuration information may further comprise a second parameter that may indicate a first power control parameter group and a second power control parameter group. Alternatively, the terminal device may select, in a predetermined manner, from a set of power control parameters, two power control parameter groups as the first power control parameter group and the second power control parameter group.

In one possible implementation, the set of power control parameters comprises a set of reference signal groups for estimating path loss and a set of open loop power control parameters composed of the parameters P0 and alpha. The first configuration information comprises a second parameter A and a second parameter B. The second parameter A indicates two open loop power control parameter groups in the open loop power control parameter set: a first open loop power control parameter group and a second open loop power control parameter group. connections. The second parameter B indicates two path loss estimation reference signal groups in the path loss estimation reference signal group set: a first path loss estimation reference signal group and a second path loss estimation reference signal group. The first group of open loop power control parameters and the first group of reference signals for estimating path loss constitute the first group of power control parameters, which means that the first group of power control parameters contains {the first group of open loop power control parameters, the first group of reference signals for path loss estimates}. The second group of open-loop power control parameters and the second group of reference signals for estimating path loss may constitute the second group of power control parameters, which means that the second group of power control parameters comprises {the second group of open-loop power control parameters, the second group of reference signals to estimate path losses}. Alternatively, the terminal apparatus may determine the first open-loop power control parameter group and the second open-loop power control parameter group from the open-loop power control parameter set according to a predetermined rule. Similarly, the first reference signal group for path loss estimation and the second reference signal group for path loss estimation are determined in the above set of reference signal groups for path loss estimation according to a predetermined rule. Finally, the first group of open loop power control parameters and the first group of reference signals for estimating path loss form the first group of power control parameters. The second group of open loop power control parameters and the second group of reference signals for estimating path loss form the second group of power control parameters.

Alternatively, in another embodiment, the first configuration information contains a first parameter and a second parameter, the first parameter indicates the first precoding information, and the second parameter indicates the second precoding information. The first precoding information corresponds to the first repetition of the PUSCH, and the second precoding information corresponds to the second repetition of the PUSCH. Optionally, the first configuration information may further comprise a third parameter and a fourth parameter, where the third parameter indicates the first group of power control parameters and the fourth parameter indicates the second group of power control parameters. The first power control parameter group indicated by the third parameter is applied to the first PUSCH repetition, and the second power control parameter group indicated by the fourth parameter is applied to the second PUSCH repetition. The third parameter and the fourth parameter may contain P0, alpha, the number l of feedback processes, a reference signal index for estimating pathloss, and other such parameters.

In one possible implementation, the first group of power control parameters may comprise a first group of open loop power control parameters and a first group of reference signals for estimating path loss, and the second group of power control parameters may comprise a second group of open loop power control parameters and the second group of reference signals for path loss estimation.

S802: The UE calculates the transmission power of the first repetition of the PUSCH based on the first group of power control parameters, and transmits the first repetition of the PUSCH based on the first precoding information.

S803: The UE calculates the transmission power of the second PUSCH repetition based on the second group of power control parameters, and transmits the second PUSCH repetition based on the second precoding information.

In one design, one set of configured grant configures at least two repetitions of the PUSCH to be transmitted separately to different TRPs. However, one configured grant set may specify only one power control parameter group. As a result, the power values found for PUSCHs addressed to different TRPs are the same. In this embodiment of the present application, two sets of power control parameters are configured to transmit the repetition of the PUSCH, so that the transmit powers of the PUSCHs addressed to different TRPs are determined using independent power control parameters. With this approach, the transmission parameter and power of the PUSCH are more adaptive to the conditions in the communication channel in which the PUSCH is located, thereby improving transmission reliability and improving transmission performance.

In FIG. 7 is a flow chart of a method for controlling the power of uplink transmissions. This procedure may be an example in which the method shown in FIG. 6 applies to the type-2 configured uplink grant for the PUSCH. This procedure contains the following steps.

S901: The first TRP transmits, to the UE, the first configuration information for configuring the power control parameter set.

S902: The first TRP transmits the DCI information to the UE, where this DCI information indicates to the UE that the repetition of the PUSCH should be transmitted to at least two TRPs. For example, the UE is indicated to send the first PUSCH repetition to the first TRP and to send the second PUSCH repetition to the second TRP.

In one possible implementation, the DCI information in step S902 may comprise a first information field, where the first information field indicates first precoding information and second precoding information. The first precoding information corresponds to the first repetition of the PUSCH, and the second precoding information corresponds to the second repetition of the PUSCH. The DCI information may further comprise a second information field, where the second information field indicates a first power control parameter group and a second power control parameter group. The first group of power control parameters corresponds to the first repetition of the PUSCH and the second group of power control parameters corresponds to the second repetition of the PUSCH. Optionally, the second information field may contain a resource indication for the SRS signal. Alternatively, the DCI information may not include the second information field. The terminal apparatus may determine the first power control parameter group and the second power control parameter group from the power control parameter set according to a predetermined rule. Alternatively, the first configuration information in step S901 may comprise a first parameter, and this first parameter indicates a first power control parameter group and a second power control parameter group. Accordingly, the UE may determine the first power control parameter group and the second power control parameter group based on the first parameter in the first configuration information.

S903: The UE calculates the transmission power of the first repetition of the PUSCH based on the first group of power control parameters, and transmits the first repetition of the PUSCH based on the first precoding information.

S904: The UE calculates the transmission power of the second PUSCH repetition based on the second group of power control parameters, and transmits the second PUSCH repetition based on the second precoding information.

In the exemplary embodiment of the present application, two groups of power control parameters for PUSCH repetition transmission are specified or configured, so that the transmit powers of PUSCHs addressed to different TRPs are determined using independent power control parameters. With this approach, the transmission parameter and power of the PUSCH are more adaptive to the conditions in the channel in which the PUSCH is located, thereby improving transmission reliability and improving transmission performance.

It should be noted that the uplink power control method proposed in the exemplary embodiment of the present application can be further used to calculate the transmission power of the PUCCH repetition in addition to calculating the transmission power of the PUSCH repetition. In other words, "PUSCH repetition" in this embodiment can be replaced by "PUCCH repetition". For example, in one particular implementation, the network device may send, to the terminal device, configuration information for configuring two groups of PUCCH power control parameters for the terminal device: a first group of PUCCH power control parameters and a second group of PUCCH power control parameters. Each of the groups, the first group of PUCCH power control parameters and the second group of PUCCH power control parameters, may contain a basic power control parameter P0 and/or index qd of the reference signal group for path loss estimation and other similar parameters. The terminal device may determine the transmission power of the first PUCCH based on the first PUCCH power control parameter and transmit, to the network device, the first repetition of the PUCCH based on the transmission power of the first PUCCH; and determining a second transmission power of the second PUCCH based on the second PUCCH power control parameter, and transmitting, to the network device, a second repetition of the PUCCH based on the transmission power of the second PUCCH.

In the above embodiments of the present application, the methods provided in these embodiments of the present application are described separately from the point of view of the network device, the terminal device, and the interaction between the network device and the terminal device. To implement the functions of the methods proposed in the variants of the present application, each network device and terminal device may contain a hardware structure and/or a software module and perform these functions in the form of a hardware structure, a software module, or a combination of a hardware structure and a software module. . Whether to implement any of the above functions using a hardware structure, a software module, or a combination of a hardware structure and a software module depends on the specific applications and design constraints for the technical solutions.

Each of the drawings in FIG. 8 and FIG. 9 is a simplified diagram of the structure of an exemplary communications equipment according to one embodiment of the present application. These communication hardware options may function as a terminal device or a network device in the above method embodiments. Therefore, the beneficial effects of the above process variants can also be achieved. Communication equipment 1000 shown in FIG. 8 includes a transceiver module 1001 and a processor module 1002.

In one possible implementation, the communication apparatus 1000 is configured to perform the functions of a terminal device during the procedure shown in FIG. 4. For example, the transceiver module 1001 is configured to receive first indication information from the network device, where the first indication information indicates first precoding information and second precoding information, the first precoding information corresponds to the first repetition of the physical uplink shared channel PUSCH, and the second information precoding corresponds to the second repetition of the PUSCH. The processor unit 1002 is configured to determine a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information. The processor module 1002 is further configured to determine the first transmission power based on the first group of power control parameters, and control the transceiver module 1001 to transmit the first repetition of the PUSCH based on the first transmission power and the first precoding information; determining a second transmission power based on the second group of power control parameters; and transmitting, by controlling the transceiver module 1001, a second repetition of the PUSCH based on the second transmission power and the second precoding information.

Optionally, the transceiver module 1001 is further configured to receive second indication information from the network device, where the second indication information indicates the first power control parameter group and the second power control parameter group. The processing unit 1002 determines the first power control parameter group corresponding to the first precoding information and the second power control parameter group corresponding to the second precoding information, and specifically, the processing unit 1002 determines, from the power control parameter set based on the second indication information, the first a power control parameter group corresponding to the first precoding information; and a second power control parameter group corresponding to the second precoding information.

Optionally, the processor module 1002 determines a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information, and specifically, the processor module 1002 determines, from the set of power control parameters according to a predetermined rule, a first power control parameter group corresponding to the first precoding information, and a second power control parameter group corresponding to the second precoding information.

Optionally, said predefined rule comprises: the first power control parameter group and the second power control parameter group are the two power control parameter groups with the lowest indices in the power control parameter set.

Optionally, the set of power control parameters contains at least one of the following sets: a set of PUSCH open-loop power control parameters, a set of reference signal groups for estimating path loss in the PUSCH, and a set of accumulated feedback process numbers, where the set PUSCH open-loop power control parameter group contains one or more groups of open-loop power control parameters formed by the base power control parameter P0 and the path loss compensation coefficient alpha, the set of reference signal groups for estimating the PUSCH path loss contains one or more indices qd of the reference signals for estimating path losses, and the set of numbers of accumulated feedback processes contains one or more numbers l of accumulated feedback processes.

Optionally, the first indication information further indicates the first power control parameter group and the second power control parameter group.

Optionally, each of the groups, the first group of power control parameters and the second group of power control parameters, contains at least one of the following: basic power control parameter P0, path loss compensation factor alpha, index qd of the reference signal groups for estimating path loss. path and the number l of accumulated processes with feedback.

In another exemplary implementation, communication equipment 1000 is configured to perform network device functions in the procedure shown in FIG. 4. For example, the transceiver module 1001 is configured to transmit the first indication information to the terminal device, where this first indication information indicates the first precoding information and the second precoding information, the first precoding information corresponds to the first group of power control parameters for the first repetition of the physical uplink shared channel PUSCH, and the second precoding information corresponds to the second group of power control parameters for the second repetition of the PUSCH. The processor module 1002 is configured to receive, by controlling the transceiver module 1001, the first repetition of the PUSCH from the terminal device based on the first precoding information.

Optionally, the transceiver module 1001 is further configured to transmit second indication information to the terminal apparatus, where the second indication information indicates the first power control parameter group and the second power control parameter group in the power control parameter set.

As an option, the processor module 1002 is further configured to determine, from a set of power control parameters according to a predefined rule, a first group of power control parameters corresponding to the first precoding information.

Optionally, said predefined rule comprises: the first power control parameter group is either of the two power control parameter groups with the lowest indices in the power control parameter set.

Optionally, the set of power control parameters contains at least one of the following sets: a set of PUSCH open-loop power control parameters, a set of reference signal groups for estimating path loss in the PUSCH, and a set of accumulated feedback process numbers, where the set The PUSCH open-loop power control parameter group contains one or more open-loop power control parameter groups composed of the basic power control parameter P0 and the path loss compensation coefficient alpha, the set of reference signal groups for estimating the PUSCH path loss contains one or several indexes qd of reference signals for estimating path losses, and the set of numbers of accumulated feedback processes contains one or more numbers l of accumulated feedback processes.

Optionally, the first indication information further indicates the first power control parameter group and the second power control parameter group.

Optionally, each group, the first group of power control parameters and the second group of power control parameters, contains at least one of the following: basic power control parameter P0, path loss compensation coefficient alpha, reference signal group index qd for estimating path loss and the number l of accumulated feedback processes.

Information for a more detailed description of the transceiver module 1001 and the processor module 1002, is given in the description of the above method options. The details will not be re-described here.

As shown in FIG. 9, communication apparatus 1100 includes a processor 1110 and an interface circuit 1120. These processor 1110 and interface circuit 1120 are connected to each other. It can be understood that the interface circuit 1120 may be a transceiver or an I/O interface. Optionally, communications hardware 1000 may further include a memory 1130 for storing instructions executed by processor 1110, or input required by processor 1110 to execute instructions, or data generated after processor 1110 executes those instructions.

When the communications apparatus 1100 is configured to implement the method of the above embodiment, the processor 1110 is configured to perform the functions of the processor module 1002 and the interface circuit 1120 is configured to perform the functions of the transceiver module 1001.

When the communication equipment is an integrated circuit (chip) in the terminal device, the integrated circuit in the terminal device performs the functions of the terminal device in the above method. This integrated circuit in the terminal device receives information from another module (eg, RF module or antenna) in the terminal device, where the information is transmitted by the network device to the terminal device. Alternatively, an integrated circuit in the terminal device transmits information to another module (eg, a RF module or antenna) in the terminal device, where the information is transmitted by the terminal device to the network device.

When the communication equipment includes an integrated circuit (chip) used in a network device, the integrated circuit in the network device performs the functions of the network device in the above embodiment of the method. This integrated circuit in the network device receives information from another module (eg, RF module or antenna) in the network device, where the information is transmitted by the terminal device to the network device. Alternatively, an integrated circuit in the network device transmits information to another module (eg, a RF module or antenna) in the network device, where the network device transmits the information to the terminal device.

It can be understood that the processor in embodiments of the present application may be a central processing unit (CPU), or may be another general purpose processor, digital signal processor (DSP), application-specific integrated circuit (application-specific integrated circuit, ASIC), field programmable gate array (FPGA), or other programmable logic device, transistorized logic device, hardware component, or any combination of these devices. A general purpose processor may be a microprocessor or any conventional processor or the like.

The method steps in the embodiments of the present application may be implemented by hardware, or may be implemented by execution of software instructions by a processor. These software commands may contain a corresponding software module. This software module can be stored in random access memory (RAM), flash memory, read only memory (Read-Only Memory, ROM), programmable read only memory (PROM). (programmable ROM, PROM)), erasable programmable read-only memory (EPROM (erasable PROM, EPROM)), electrically erasable programmable read-only memory (EEPROM (electrically EPROM, EEPROM)), register, on a hard disk, on a removable hard disk, on a CD-ROM disc or some other type of storage media well known in the art. For example, an information storage medium is coupled to the processor such that the processor can read information from, or write information to, the information storage medium. Of course, such an information storage medium may alternatively be a component of a processor. The processor and storage medium may be located in an ASIC. In addition, the ASIC may be located in the network access device or in the terminal device. Of course, the processor and storage medium may alternatively exist as discrete components in a network access device or terminal device.

All or some of the above options may be implemented through downloadable software, hardware, firmware, or any combination of these items. When downloadable software is used to implement the variations, all or some of the variations may be implemented in the form of a computer program product. This computer program product contains one or more computer programs or instructions. When these computer programs or instructions are loaded or executed by the computer, all or some of the procedures or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, a specialized computer, a computer network, or other programmable hardware. The computer programs or instructions may be stored on a computer-readable storage medium, or may be transmitted over such a computer-readable storage medium. This computer-readable storage medium may be any useful medium available to the computer, or a storage device such as a server integrating one or more useful media. Such a useful medium may be a magnetic medium, such as a floppy disk, hard disk drive, or magnetic tape; or it may be an optical medium, such as a DVD disc; or it can be a semiconductor medium, such as a solid-state drive (solid-state drive, SSD).

In the variants of the present application, unless otherwise stated or there is no logical conflict, the terms and/or descriptions are consistent between the various variants and may mutually refer to each other, and the technical features of the various variants can be combined based on the internal logical relationships between them to form a new variant. .

In the present application, "at least one" means "one or more" and "several" means "two or more". The term "and/or" describes an association relationship between associated objects and represents that three relationships can exist. For example, the relation "A and/or B" could represent the following cases: Only A exists, both A and B exist, and only B exists, where A and B can be singular or plural. In the text description of the present application, the symbol "/" denotes an "or" relationship between associated objects. In one of the formulas in this application, the symbol "/" denotes a division ratio between associated objects. In addition, in the description of the present application, "several of" means two or more than two, unless otherwise specified. "At least one of the following objects (elements)" or a similar expression means any combination of these objects, including any combination of single objects (elements) or multiple objects (elements). For example, "at least one of a, b, or c" may indicate: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b and c may be in singular or plural. In addition, in order to clearly describe the technical solution in the embodiments of the present application, words such as "first" and "second" are used in the embodiments of the present application to distinguish between the same objects or similar objects having basically the same functions or purpose. One skilled in the art may understand that terms such as "first" and "second" do not limit the number or sequence of execution, nor do terms such as "first" and "second" indicate a well-defined difference.

In addition, the network architecture and service scenarios described in the embodiments of this application are intended to more clearly describe the technical solutions of the variants of this application and do not constitute any limitation on the technical solutions in these variants. Even an ordinary person in the field under consideration may know that the technical solutions proposed in the variants of the present application are also applicable to similar problems that arise as network architecture evolves and new service scenarios emerge. It can be understood that the various numbers in the embodiments of the present application are merely for differentiation in order to facilitate description and are not used to limit the scope of the embodiments of the present application. The sequence numbers of the above processes do not indicate the sequence of execution. Process execution sequences should be determined according to the functions and internal logic of these processes.

Claims (37)

1. A method for controlling transmission power in an uplink, comprising: receiving first indication information from the network device, where the first indication information indicates first precoding information and second precoding information, the first precoding information corresponds to the first repetition of the physical uplink shared channel PUSCH, and the second precoding information corresponds to the second repetition of the PUSCH; determining a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information; determining a first transmission power based on a first group of power control parameters, and transmitting a first PUSCH repetition based on that first transmission power and the first precoding information; And determining a second transmission power based on the second group of power control parameters, and transmitting a second PUSCH repetition based on the second transmission power and the second precoding information. 2. The method of claim 1, wherein the method further comprises: receiving second indication information from the network device, where the second indication information indicates a first power control parameter group and a second power control parameter group; and a procedure for determining a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information, specifically comprising: determining, from the power control parameter set based on the second indication information, a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information. 3. The method of claim 1, wherein the procedure for determining the first power control parameter group corresponding to the first precoding information and the second power control parameter group corresponding to the second precoding information specifically comprises: determining, from a set of power control parameters according to a predetermined rule, a first power control parameter group corresponding to the first precoding information and a second power control parameter group corresponding to the second precoding information. 4. The method of claim 3, wherein said predetermined rule comprises: the first power control parameter group and the second power control parameter group are the two power control parameter groups with the lowest indices in the power control parameter set. 5. The method according to any one of paragraphs. 2-4, wherein the set of power control parameters comprises at least one of the following sets: a set of open loop power control parameters in the PUSCH channel, a set of reference signal groups for estimating path losses in the PUSCH channel, and a set of numbers of accumulated processes with feedback, where the PUSCH open-loop power control parameter set comprises one or more open-loop power control parameter groups composed of the basic power control parameter P0 and the path loss compensation factor alpha, the set of reference signal groups for estimating the PUSCH path loss comprises one or more indices qd of reference signals for estimating path loss, and the set of numbers of accumulated feedback processes contains one or more numbers l of accumulated feedback processes. 6. The method of claim 1, wherein the first indication information further indicates the first power control parameter group and the second power control parameter group. 7. The method according to any one of paragraphs. 1-6, in which each of the groups - the first group of power control parameters and the second group of power control parameters, contains at least one of the following: basic power control parameter P0 and path loss compensation factor alpha; reference signal group index qd for path loss estimation; And the number l of accumulated processes with feedback. 8. A method for controlling transmission power in an uplink, comprising: transmitting the first indication information to the terminal apparatus, where the first indication information indicates the first precoding information and the second precoding information, the first precoding information corresponds to the first group of power control parameters for the first repetition of the physical uplink shared channel PUSCH, and the second precoding information corresponds to the second a power control parameter group for the second repetition of the PUSCH; And receiving the first repetition of the PUSCH from the terminal device based on the first precoding information. 9. The method of claim 8, wherein the method further comprises: transmitting second indication information to the terminal apparatus, where the second indication information indicates the first power control parameter group and the second power control parameter group in the power control parameter set. 10. The method of claim 8, wherein the method further comprises: determining, from the set of power control parameters according to a predetermined rule, a first group of power control parameters corresponding to the first precoding information. 11. The method of claim 10, wherein said predetermined rule comprises: either of the two power control parameter groups with the lowest indices in the power control parameter set is the first power control parameter group. 12. The method according to any one of paragraphs. 9-11, wherein the set of power control parameters comprises at least one of the following sets: a set of open loop power control parameters in the PUSCH channel, a set of reference signal groups for estimating path loss in the PUSCH channel, and a set of numbers of accumulated processes with feedback, where the PUSCH open-loop power control parameter set comprises one or more open-loop power control parameter groups composed of the basic power control parameter P0 and the path loss compensation factor alpha, the set of reference signal groups for estimating the PUSCH path loss comprises one or more indices qd of reference signals for estimating path loss, and the set of numbers of accumulated feedback processes contains one or more numbers l of accumulated feedback processes. 13. The method of claim 8, wherein the first indication information further indicates the first power control parameter group and the second power control parameter group. 14. The method according to any one of paragraphs. 8-12, in which each group, the first group of power control parameters and the second group of power control parameters, contains at least one of the following: basic power control parameter P0 and path loss compensation factor alpha; reference signal group index qd for path loss estimation; And the number l of accumulated processes with feedback. 15. Equipment for controlling transmission power in the uplink, containing a module configured to implement the method according to any one of paragraphs. 1-7. 16. Equipment for controlling transmission power in the uplink, containing a module configured to implement the method according to any one of paragraphs. 8-14. 17. Equipment for controlling the power of transmissions in the uplink, containing a processor and a communication interface, where the communication interface is configured to: receive a signal from some communication equipment other than the communication equipment in question, and transmit a signal to the processor or transmit a signal from the processor to the communication equipment , different from the considered equipment; and the processor is configured to implement the method according to any one of paragraphs. 1-7 using a logic circuit or by executing code instructions. 18. Equipment for controlling the power of transmissions in the uplink, containing a processor and a communication interface, where the communication interface is configured to: receive a signal from some communication equipment other than the communication equipment in question, and transmit a signal to the processor, or transmit a signal from the processor to the communication equipment , different from the considered equipment; and the processor is configured to implement the method according to any one of paragraphs. 8-14 using a logic circuit or by executing code instructions. 19. Computer-readable storage medium, in which this computer-readable storage medium stores a computer program, so that when this computer program is running, the method according to any one of claims. 1-7. 20. Computer-readable storage medium, in which this computer-readable storage medium stores a computer program, so that when this computer program is running, the method according to any one of claims. 8-14.

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