WO2020199066A1

WO2020199066A1 - Power control method and related device

Info

Publication number: WO2020199066A1
Application number: PCT/CN2019/080705
Authority: WO
Inventors: 余健; 杨常青
Original assignee: 华为技术有限公司
Priority date: 2019-03-30
Filing date: 2019-03-30
Publication date: 2020-10-08
Also published as: CN113615280B; CN113615280A

Abstract

The present application provides a power control method and a related device. According to the power control method, a network device can determine power control parameter of a downlink data channel, notify the power control parameter to a terminal device via a physical layer signaling such as a downlink control message, and send the downlink data channel on the basis of the power control parameter. Hence, in the implementation mode, the network device can determine the transmitting power of the downlink data channel on its own, and notify the transmitting power of the downlink data channel based on the downlink control message. The downlink control message has a strong real-time property such that the network device can flexibly adjust the transmitting power of the downlink data channel, which is beneficial for improving the transmission performance of the downlink data channel while avoiding inter-user or inter-cell interference.

Description

Power control method and related device

Technical field

This application relates to the field of communication technology, and in particular to a power control method and related devices.

Background technique

In a wireless communication system, according to the different types of sending nodes and receiving nodes, communication can be divided into different types. Usually, the network device sending information to the terminal device is called downlink communication. In downlink communication, the network device can adjust the transmission power of each channel or signal through the downlink power control mechanism to improve downlink communication link performance and reduce base station energy consumption .

In the downlink power control, it is usually notified by other parameters configured by high-level signaling, so that the network equipment cannot perform power control flexibly according to the current channel state, that is, the flexibility of adjusting the transmit power of the downlink data channel is low. .

Summary of the invention

The present application provides a power control method, which can flexibly adjust the transmit power of the downlink data channel.

In the first aspect, the present application provides a power control method. In the power control method, the network device can determine the power control parameter of the downlink data channel, and notify the power control parameter to the terminal device through physical layer signaling, such as The downlink control information is sent to the terminal device, and the downlink data channel is sent based on the power control parameter. It can be seen that in this embodiment, the network device can determine the transmit power of the downlink data channel by itself, and notify the transmit power of the downlink data channel based on the downlink control information , Due to the strong real-time nature of the downlink control information, the network equipment can flexibly adjust the transmit power of the downlink data channel.

In an optional implementation manner, the power control parameter may include at least one of the following: the first offset of the energy per resource unit of the downlink data channel with respect to the energy per resource unit of the demodulation reference signal; and the phase; Tracking the second offset of the energy per resource unit of the reference signal relative to the energy per resource unit of the downlink data channel; and the second offset of the energy per resource unit of the downlink data channel relative to the energy per resource unit of the cell reference signal Three offsets. Among them, the first offset is good for estimating the amplitude or phase of the downlink data channel, the second offset is good for estimating the phase of the downlink data channel in the high frequency band, and the third offset is good for based on the cell reference signal The channel estimation information further corrects the amplitude or phase of the downlink data channel. In addition, in the embodiment of the present application, the power control parameter includes not only the offset associated with the above three reference signals, but also the offset associated with other types of reference signals, so as to help improve the channel estimation of the downlink data channel. The accuracy of the downlink data channel is further improved.

In an optional implementation manner, since the network device can determine the power control parameter of the downlink data channel in real time, the network device can determine the power control parameter from aspects such as its own power consumption and channel state information. For example, the network equipment determines the power control parameters of the downlink data channel, including: the network equipment determines the first signal to interference plus noise ratio threshold and the second signal to interference plus noise ratio threshold corresponding to the modulation and coding method selected for the downlink data channel Value, the second signal to interference plus noise ratio threshold is less than the first signal to interference plus noise ratio threshold; the network device calculates the average signal and interference on the time-frequency resources of the downlink data channel Plus noise ratio; the network device determines the power control parameter of the downlink data channel according to the difference between the average signal to interference plus noise ratio and the second signal to interference plus noise ratio threshold. Therefore, it can be ensured that the transmission power of the base station is reduced without changing the MCS selection, which is beneficial to reducing the energy consumption of the base station.

In an optional implementation manner, the power control parameters may include two types, a first type of power control parameter and a second type of power control parameter; the first type of power control parameter is related to demodulation reference signal, phase tracking Reference signal or cell reference signal for frequency division multiplexing downlink data channel power control parameters; the second type of power control parameters are not related to the demodulation reference signal, the phase tracking reference signal or the cell reference signal Power control parameters of the downlink data channel for frequency division multiplexing. It can be seen that, in this implementation manner, the power control parameters of the downlink data channel that is frequency division multiplexed with the aforementioned reference signal can be different from the power control parameters of the downlink data channel that is not frequency division multiplexed with the aforementioned reference signal.

In an optional implementation manner, the downlink data channel may be a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH), an enhanced physical downlink shared channel (Enhanced Physical Downlink Shared Channel, EPDSCH), and a narrowband physical downlink shared channel ( Narrowband Physical Downlink Shared Channel, PDSCH), or other channels used for data transmission, are not limited in this embodiment of the application.

In an optional implementation manner, the power control parameter of the downlink data channel may be indicated by a preset number of bits in the downlink control information, and the greater the preset number, the power represented by The finer the granularity of the control parameter, that is, the larger the selectable range of the power control parameter, which facilitates the selection of more accurate power control in combination with channel state information. For example, if the power control parameter used to indicate the downlink data channel in the downlink control information is N bits, the N bits may represent 2 ^N optional options. Correspondingly, when the power control parameter includes the above-mentioned multiple offsets, different bits may be used for different offsets to indicate respectively, or the same bit multiplexing indication may be used, which is not limited in this application.

In the second aspect, this application also provides a power control method, which is explained from the perspective of a terminal device. In the power control method described in this aspect, a terminal device receives downlink control information, and the downlink control information includes a power control parameter of a downlink data channel; the terminal device receives the downlink data channel according to the power control parameter. It can be seen that the terminal equipment can directly obtain the power control parameters of the downlink data channel from the downlink control information, thereby helping to improve the receiving accuracy of the downlink data channel.

In an optional implementation manner, the power control parameter includes at least one of the following: the first offset of the energy per resource unit of the downlink data channel with respect to the energy per resource unit of the demodulation reference signal; phase tracking The second offset of the energy per resource unit of the reference signal relative to the energy per resource unit of the downlink data channel; the third offset of the energy per resource unit of the downlink data channel relative to the energy per resource unit of the cell reference signal Shift.

In an optional implementation manner, the power control parameters include a first type of power control parameter and a second type of power control parameter; the first type of power control parameter is related to a demodulation reference signal, a phase tracking reference signal, or The power control parameter of the downlink data channel where the cell reference signal is frequency-division multiplexed; the second type of power control parameter is that no frequency division is performed with the demodulation reference signal, the phase tracking reference signal, or the cell reference signal Power control parameters of the multiplexed downlink data channel.

In an optional implementation manner, the downlink data channel may be a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH), an enhanced physical downlink shared channel (Enhanced Physical Downlink Shared Channel, EPDSCH), and a narrowband physical downlink shared channel ( Narrowband Physical Downlink Shared Channel, PDSCH), or other downlink channels used for data transmission, are not limited in the embodiment of this application.

In the third aspect, this application provides a device. The device provided in the present application has the function of realizing the behavior of the terminal device in the above method, and it includes means for executing the steps or functions described in the above method. The steps or functions can be realized by software, or by hardware (such as a circuit), or by a combination of hardware and software.

In a possible design, the foregoing device includes one or more processors and communication units. The one or more processors are configured to support the apparatus to perform corresponding functions of the terminal device in the foregoing method. The communication unit is used to support the device to communicate with other devices, and realize the receiving and/or sending functions. For example, transmit power control parameters and downlink data channels.

Optionally, the device may further include one or more memories, where the memory is used for coupling with the processor and stores necessary program instructions and/or data for the device. The one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.

The device may be a smart terminal or a wearable device, etc., and the communication unit may be a transceiver or a transceiver circuit. Optionally, the transceiver may also be an input/output circuit or interface.

The device may also be a communication chip. The communication unit may be an input/output circuit or interface of a communication chip.

In another possible design, the above device includes a transceiver, a processor, and a memory. The processor is used to control the transceiver or the input/output circuit to send and receive signals, the memory is used to store a computer program, and the processor is used to run the computer program in the memory so that the device executes the first aspect or any one of the first aspect The method completed by the terminal device in the possible implementation mode.

In the fourth aspect, this application provides another device. The device includes one or more processors and communication units. The one or more processors are configured to support the apparatus to perform corresponding functions of the network device in the above method. The communication unit is used to support the device to communicate with other devices, and realize the receiving and/or sending functions. For example, receive power control parameters and downlink data channels.

Optionally, the device may further include one or more memories, where the memories are configured to be coupled with the processor, and store necessary program instructions and/or data for the network device. The one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.

The device may be a base station, gNB or TRP, etc., and the communication unit may be a transceiver, or a transceiver circuit. Optionally, the transceiver may also be an input/output circuit or interface.

In another possible design, the above device includes a transceiver, a processor, and a memory. The processor is used to control the transceiver or the input/output circuit to send and receive signals, the memory is used to store a computer program, and the processor is used to run the computer program in the memory, so that the device executes any one of the second aspect or the second aspect. The method used by the network device in the implementation mode.

In a fifth aspect, this application provides a system that includes the above-mentioned terminal equipment and network equipment, or includes the above-mentioned device.

In a sixth aspect, the present application provides a computer-readable storage medium for storing a computer program, the computer program including instructions for executing the first aspect or the method in any one of the possible implementation manners of the first aspect.

In a seventh aspect, the present application provides a computer-readable storage medium for storing a computer program, and the computer program includes instructions for executing the second aspect or any one of the possible implementations of the second aspect.

In an eighth aspect, this application provides a computer program product, the computer program product comprising: computer program code, when the computer program code runs on a computer, the computer executes the first aspect or any of the first aspects. One of the possible implementation methods.

In a ninth aspect, the present application provides a computer program product, the computer program product comprising: computer program code, when the computer program code runs on a computer, the computer executes any of the above second aspect and the second aspect One of the possible implementation methods.

Description of the drawings

Fig. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of the present application;

FIG. 2 is a schematic flowchart of a power control method provided by an embodiment of the present application;

FIG. 3 is a schematic flowchart of a PDSCH and DM-RS frequency division multiplexing according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a power control device provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another power control device provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application;

Fig. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application.

detailed description

The embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention.

It should be understood that the technical solution of this application can be specifically applied to various communication systems, such as: Global System of Mobile Communication (GSM), Code Division Multiple Access (CDMA), and Wideband Code Division Multiple access (Wideband Code Division Multiple Access, WCDMA), Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), Universal Mobile Telecommunication System (UMTS), Long Term Evolution (Long Term Evolution, LTE) system, etc. With the continuous development of communication technology, the technical solution of this application can also be used in future networks, such as the fifth generation mobile communication technology (The Fifth Generation Mobile Communication Technology, 5G) system, which can also be called New Radio (NR) system, end-to-end (device to device, D2D) system, machine to machine (M2M) system, etc.

The communication involved in the embodiments of the present invention can be between a base station and a terminal, or between a base station and a base station, such as between a macro base station and a small base station, or between a terminal and a terminal, such as D2D Communication in the network. The embodiment of the present application takes communication between a base station and user equipment as an example. Wherein, the user equipment may refer to a wireless terminal or a wired terminal. The wireless terminal can be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connection function, or other processing device connected to a wireless modem. It can be accessed via a wireless access network (such as RAN, radio access). network) to communicate with one or more core networks. For example, the user equipment can be a mobile terminal, such as a mobile phone (or called a "cellular" phone) and a computer with a mobile terminal, and can also be a portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile device, such as Personal Communication Service (PCS) phone, cordless phone, Session Initiation Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), etc. , They exchange language and/or data with the wireless access network. Optionally, the user equipment may also be called a mobile station (Mobile Station, MS), a mobile terminal (mobile terminal), a subscriber unit (Subscriber Unit, SU), a subscriber station (Subscriber Station, SS), and a mobile station (Mobile Station). , MB), remote station (Remote Station, RS), access point (Access Point, AP), remote terminal (Remote Terminal, RT), access terminal (Access Terminal, AT), user terminal (User Terminal; UT) , User agent (UserAgent, UA), terminal device (UserDevice, UD), etc., which are not limited by this application.

In this application, the network equipment may include a base station, a transmission reception point (Transmission Reception Point, TRP), or a radio frequency unit, such as a remote radio unit (RRU). A base station may refer to a device that communicates with a terminal through one or more sectors on the air interface in the access network, and it can coordinate the attribute management of the air interface. For example, the base station can be a base station in GSM or CDMA, such as a base transceiver station (BTS), a base station in WCDMA, such as NodeB, or an evolved base station in LTE, such as eNB or e -NodeB (evolutional Node B), which can also be a base station in a 5G system, or a base station in a future network, etc., which is not limited in this application. Optionally, the base station may also be a relay device, or other network element devices with base station functions.

In the embodiment of this application, the downlink data channel may be a physical downlink shared channel (PDSCH), an enhanced physical downlink shared channel (EPDSCH), and a narrowband physical downlink shared channel (Narrowband Physical Downlink Shared Channel) Channel, PDSCH), or other downlink channels used to transmit data, which are not limited in the embodiment of the present application.

In the embodiments of this application, information, signal, message, and channel can sometimes be used together. It should be noted that the meanings to be expressed are the same when the differences are not emphasized. "的 (of)", "corresponding (relevant)" and "corresponding" can sometimes be used together. It should be pointed out that the meanings to be expressed are the same when the difference is not emphasized.

In the embodiment of this application, the power control parameter of the downlink data channel can be indicated in the unit of energy per resource element (EPRE). In addition, the power control parameter of the downlink data channel can refer to the energy per resource unit of the signal For reference, for example, the power control parameter of the downlink data channel may include at least one of the following: the first offset of the energy per resource unit of the demodulation reference signal with respect to the energy per resource unit of the downlink data channel; Tracking the second offset of the energy per resource unit of the reference signal relative to the energy per resource unit of the downlink data channel; the third offset of the energy per resource unit of the downlink data channel relative to the energy per resource unit of the cell reference signal Offset. In addition, the reception of the downlink data channel can be determined based on the above-mentioned power control parameters and the channel estimation information of their associated reference signals.

In the embodiments of the present application, the downlink control information may also be referred to as downlink control information elements or information control information, etc., and the information sent through the physical downlink control channel is not limited in the embodiments of the present application. At least one offset included in the above power control parameter may be indicated by a dedicated bit in the downlink control information, or may be indicated by multiplexing other optional bits. Correspondingly, the downlink control information of the field of the power control parameter of the downlink data channel is added, and the downlink control information (Downlink Control Information, DCI) format in LTE or 5G NR can be modified. Optionally, a new DCI format, such as a dedicated DCI, can also be introduced to transmit the power control parameters of the downlink data channel. For example, the power control parameter of the newly added downlink data channel may be a field with a bit number of N, which is used to indicate one or more offsets mentioned above.

Optionally, the power control parameter of the downlink data channel may adopt the same power control parameter for all the downlink data channels, that is, the energy of each resource unit of the downlink data channel is the same. Optionally, the power control parameters include a first type of power control parameter and a second type of power control parameter; the first type of power control parameter is frequency division with a demodulation reference signal, a phase tracking reference signal, or a cell reference signal The power control parameter of the multiplexed downlink data channel; the second type of power control parameter is a downlink data channel that is not frequency-division multiplexed with the demodulation reference signal, the phase tracking reference signal, or the cell reference signal Power control parameters. That is, the downlink data channel includes two types of symbols. On one type of symbols, the downlink data channel and the reference signal are frequency division multiplexed; on the other type of symbols, the downlink data channel is not frequency division multiplexed with the reference signal. Therefore, different power control parameters can be set for the downlink data channel on the first type of symbols and the downlink data channel on the second type of symbols, which greatly enhances the flexibility of power control parameter adjustment.

Optionally, when the downlink control information issued by the network device includes the power control parameters of the downlink data channel, if the terminal device is capable of supporting this function, that is, it can receive the power control parameters of the downlink data channel, it can be based on the downlink data channel power control parameters. The power control parameter of the data channel is used to receive the downlink data channel; if the terminal device is not capable of supporting this function, if it cannot receive the power control parameter of the downlink data channel, it can default to the power control of the downlink data channel contained in the downlink control information The value of the parameter is 0, or the power control parameter of the downlink data channel included in the downlink control information is not used to receive the downlink data channel. Optionally, if the downlink control information issued by the network device does not include the power control parameter of the downlink data channel, the value of the power control parameter of the downlink data channel included in the downlink control information may be 0 by default, or the value of the power control parameter of the downlink data channel may not be used. The power control parameter of the downlink data channel estimates the channel information on the entire time-frequency resource of the downlink data channel.

Hereinafter, without loss of generality, an interaction process between a terminal device and a network device is used as an example to describe in detail the embodiments of the present application. The terminal device may be a terminal device in a wireless communication system that has a wireless connection relationship with the network device. It is understandable that the network device can perform power control on the downlink data channel based on the same technical solution with multiple terminal devices in a wireless connection relationship in the wireless communication system. This application does not limit this.

Please refer to Figure 1. Figure 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of the present invention. As shown in Figure 1, the wireless communication system uses a network device as a base station as an example, and a terminal as a mobile phone as an example. Gesture.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of a power control method provided by an embodiment of the present application. The power control method is based on the wireless communication system shown in FIG. 1, and may include the following steps:

101. The network device determines the power control parameter of the downlink data channel;

102. The network device sends downlink control information, and sends a downlink data channel based on the power control parameter, where the downlink control information includes the power control parameter; the terminal device receives the downlink control information.

103. The terminal device receives the downlink data channel according to the power control parameter.

In the embodiment of the present application, the network device may determine the power control parameter of the downlink data channel based on its own power consumption, channel state information, and the like. In an optional implementation manner, determining the power control parameter of the downlink data channel by the network device may include: the network device determining the first signal-to-interference plus noise ratio threshold and the first signal-to-interference-to-noise ratio corresponding to the modulation and coding scheme selected for the downlink data channel 2. Signal to interference plus noise ratio threshold, the second signal to interference plus noise ratio threshold is less than the first signal to interference plus noise ratio threshold; the network device calculates the downlink data channel The average signal to interference plus noise ratio on the time-frequency resource; the network device determines the average signal to interference plus noise ratio according to the difference between the second signal to interference plus noise ratio threshold Power control parameters of the downlink data channel.

Among them, the network device sends the channel state information reference signal (Channel state information reference signal, CSI-RS) measurement configuration information to the terminal device, which includes resource configuration information of the CSI-RS, measurement period information, etc.; the terminal device configures according to the measurement Information, measure the current channel state information (Channel state information, CSI), and report it to the network device in the indicated uplink time slot or uplink time unit. The reported CSI includes the rank indicator (RI) and the precoding indicator ( Precoding matrix indicator), channel quality indicator (CQI), etc.; the network device allocates time-frequency resources to the terminal device according to the CSI reported by the terminal device, and calculates all the allocated time-frequency resources based on the allocated time-frequency resources The average signal to interference plus noise ratio (SINR) of the signal to interference plus noise ratio (SINR), and the modulation coding index (MCS) of the downlink data channel to be transmitted is determined based on the SINR; the network equipment according to the determined MCS, A higher SINR threshold corresponding to the MCS, that is, the first SINR threshold, and a lower SINR threshold, that is, the second SINR threshold, can be obtained by looking up the table.

Wherein, the network device determines the power control parameter of the downlink data channel according to the difference between the average signal and the interference plus noise ratio threshold and the second signal and the interference plus noise ratio threshold, which may be , The network device quantifies the difference to obtain the power control parameter of the downlink data channel.

It can be seen that the above-mentioned network equipment does not change the MCS of the downlink data channel in the process of determining the power control parameters of the downlink data channel, but can determine the power control parameters based on the SINR, which is beneficial to ensure that the amount of transmitted data remains unchanged. Reduce the power consumption of network equipment.

In an optional implementation manner, the power control parameter includes the first offset, that is, the offset of the EPRE of the downlink data channel relative to the EPRE of the DM-RS. In this way, the network equipment can determine different offsets according to the signal to interference and noise ratio of the terminal equipment. For example, for cell edge users with low SINR, the performance of channel estimation can be enhanced by increasing the power of DM-RS. For another example, when the base station needs to reduce the transmission power of the downlink data channel in order to save energy, it can directly indicate the offset of the EPRE of the downlink data channel relative to the EPRE of the DM-RS, which is beneficial to ensure the accuracy of channel estimation and achieve energy saving. the goal of.

Optionally, the first offset may be N1 bits. For example, if N1=2, then four offsets can be indicated. As shown in Table 1, the values of the two bits may respectively indicate four offsets. The first offsets are 0dB, -1dB, -2dB, -3dB.

Table 1

The bit value of the N1 bits in DCI

First offset

0000	0dB0dB
0101	-1dB-1dB
1010	-2dB-2dB
1111	-3dB-3dB

For another example, N1=3, it can indicate four offsets. As shown in Table 1, the value of the 3 bits can represent 8 first offsets, respectively, 0dB, -1dB, -2dB , -3dB, -4dB, -5dB, -6dB, -7dB. It can be seen that the larger the bit N1, the more options of the first offset that can be indicated.

In an optional implementation manner, the lower row data channel is PDSCH as an example, Δ represents the first offset, P _PDSCH represents the EPRE of PDSCH, and P _DMRS represents the EPRE of DM-RS, then P _PDSCH and P _DMRS The relationship can be expressed as:

Ρ _PDSCH = Ρ _DMRS +Δ (1)

Correspondingly, the amplitude ratio of DM-RS to PDSCH

Can be expressed as:

It can be seen that the above formulas (1), (2) and the channel estimation information of the DM-RS can be used to estimate the channel information on the entire time-frequency resource of the PDSCH to demodulate the PDSCH.

In another optional implementation manner, in addition to the downlink control information carrying the power control parameters of the downlink data channel, the downlink data channel can also be determined according to the number of CDM groups that are not multiplexed with data and the configuration parameters of the DM-RS The fourth offset of the EPRE relative to the EPRE of the DM-RS. Optionally, the fourth offset can be determined from Table 2 below.

Table 2

不与数据复用的CDM组数Number of CDM groups not multiplexed with data	DM-RS配置1DM-RS configuration 1	DM-RS配置2DM-RS configuration 2
11	0dB0dB	0dB0dB
22	-3dB-3dB	-3dB-3dB
33	--	-4.77dB-4.77dB

For example, taking PDSCH as an example, taking β _{DMRS to} represent the fourth offset, the relationship between PDSCHEPRE and DM-RSEPRE can be expressed as:

Ρ _PDSCH = Ρ _DMRS + β _DMRS + Δ (3)

Correspondingly, the amplitude ratio of DM-RS to PDSCH

Can be expressed as:

It can be seen that compared with the previous embodiment, the power control of the downlink data channel in this embodiment can be determined by comprehensively considering the number of CDM groups that are not multiplexed with data, DM-RS configuration parameters, and signal-to-interference and noise ratio. That is to say, the downlink control information also includes the number of code division multiplexing groups that are not multiplexed with data; the terminal device can determine the number of code division multiplexing groups that are not multiplexed with data and the high-level signaling configuration. The reference signal configuration parameter is adjusted, and the fourth offset of the energy per resource unit of the PDSCH relative to the energy per resource unit of the demodulation reference signal is determined; the terminal device is based on the first offset, the fourth offset The offset and the channel estimation information of the demodulation reference signal are received PDSCH. Compared with the prior art that can only receive the PDSCH based on the number of code division multiplexing groups that are not multiplexed with data and the fourth offset determined by the demodulation reference signal configuration parameter configured by the higher layer signaling, it can ensure that the PDSCH is reduced While power consumption, the flexibility of power control of the downlink data channel is improved.

In an optional implementation manner, the power control parameter includes a second offset, that is, the energy per resource unit of the phase tracking reference signal (PT-RS) relative to the downlink data channel The second offset of energy per resource unit. Among them, the PT-RS is mainly used for phase noise estimation in millimeter wave communication systems. Therefore, when the upper layer does not configure PT-RS, that is, the reception of downlink data channels does not require PT-RS, and there is no downlink data channel. Power control issues with PT-RS. When the PT-RS is configured by the upper layer, the network equipment can determine different offsets according to the difference in the signal-to-interference and noise ratio between the cell edge users and the cell center users. For example, for cell edge users with low SINR, the performance of channel estimation can be enhanced by increasing the power of PT-RS. For another example, when the base station needs to reduce the transmission power of the downlink data channel in order to save energy, but at the same time ensure that the power of the PT-RS remains unchanged, and separately indicate the offset of the EPRE of the downlink data channel relative to the EPRE of the PT-RS, it can ensure The accuracy of channel estimation can also achieve the purpose of energy saving.

Optionally, the second offset may be N2 bits. For example, if N2=2, then four offsets can be indicated. As shown in Table 1, the values of the two bits may respectively indicate four offsets. The first offsets are 0dB, 1dB, 2dB, 3dB. For another example, N2=3, then eight offsets can be indicated, and the value of the 3 bits can respectively represent 8 first offsets The amount is 0dB, 1dB, 2dB, 3dB, 4dB, 5dB, 6dB, 7dB. It can be seen that the larger the bit N1, the more options of the second offset that can be indicated.

In an optional implementation manner, the lower data channel is PDSCH as an example, and Δ′ represents the second offset, that is, the offset of PT-RS EPRE relative to PDSCHEPRE. P _PDSCH represents the EPRE of PDSCH, and P _PTRS represents the EPRE of PT-RS. The relationship between P _PDSCH and P _PTRS can be expressed as:

Ρ _PDSCH = Ρ _PTRS -Δ' (5)

Correspondingly, the amplitude ratio of PT-RS to PDSCH

Can be expressed as:

It can be seen that the above formulas (5), (6) and the channel estimation information of the PT-RS can be used to estimate the phase information on the PDSCH time-frequency resources to demodulate the PDSCH.

In another optional implementation manner, in addition to the downlink control information carrying the second offset, the EPRE ratio of the PT-RS relative to the downlink transmission layer can be determined according to the EPRE ratio configured by the higher-layer signaling and the number of PDSCH transmission layers. The fifth offset of the EPRE of the data channel. Optionally, the fifth offset can be determined from Table 3 below.

table 3

For example, taking PDSCH as an example, taking β _{PTRS to} represent the fifth offset, the relationship between PDSCH EPRE and PT-RS EPRE can be expressed as:

Ρ _PDSCH = Ρ _PTRS -β _PTRS -Δ′ (7)

Correspondingly, the amplitude ratio of PT-RS to PDSCH

Can be expressed as:

It can be seen that compared with the previous embodiment, the power control of the downlink data channel in this embodiment can be determined by comprehensively considering the EPRE ratio configured by the high-level signaling, the transmission layer of the downlink data channel, and the signal-to-interference and noise ratio. In other words, the terminal device can determine the fifth offset of the energy per resource unit of the PDSCH relative to the energy per resource unit of the phase tracking reference signal according to the EPRE ratio configured by the high-level signaling and the transmission layer of the downlink data channel. The amount; the terminal device receives the PDSCH according to the second offset, the fifth offset, and the channel estimation information of the phase tracking reference signal. Compared with the prior art that can only estimate the channel information of the time-frequency resource where the PDSCH is located based on the fifth offset, the flexibility of PDSCH power control can be improved, and the accuracy of channel estimation of the downlink data channel can be improved, thereby improving The receiving accuracy rate of the downlink data channel.

In an optional implementation manner, the power control parameter includes a third offset, that is, the energy per resource unit of the downlink data channel relative to the energy per resource unit of the cell reference signal (CRS). Three offsets. Among them, the CRS is mainly used in the LTE system. Therefore, when there is no CRS, that is, the reception of the downlink data channel does not need to use the CRS, and there is no problem of power control between the downlink data channel and the CRS. When CRS exists, in this way, the network equipment can determine different offsets according to the difference in the signal to interference and noise ratio of the terminal equipment. For example, for cell edge users with low SINR, the performance of channel estimation can be enhanced by increasing the power of CRS. For another example, when the base station needs to reduce the transmission power of the downlink data channel in order to save energy, while ensuring that the CRS power remains unchanged, and separately indicating the offset of the EPRE of the downlink data channel relative to the EPRE of the CRS, the accuracy of the channel estimation can be guaranteed It can achieve the purpose of energy saving.

Optionally, the third offset may be N3 bits. For example, if N3=2, then four offsets can be indicated. As shown in Table 1, the values of the two bits may respectively indicate four offsets. The first offsets are respectively 0dB, -1dB, -2dB, -3dB. For another example, N2=3, then eight offsets can be indicated, and the value of the 3 bits can respectively represent the 8th An offset is 0dB, -1dB, -2dB, -3dB, -4dB, -5dB, -6dB, -7dB. It can be seen that the larger the bit N3, the more options for the third offset that can be indicated.

In an optional implementation manner, the lower row data channel is PDSCH as an example, Δ″ represents the third offset, P _PDSCH represents the EPRE of the PDSCH, and P _CRS represents the EPRE of the CRS, then the P _PDSCH and P _CRS The relationship can be expressed as:

Ρ _PDSCH = Ρ _CRS +Δ″ (9)

Correspondingly, the ratio of the amplitude of the PDSCH to the CRS

Can be expressed as:

It can be seen that the above formulas (9), (10) and the channel estimation information of the CRS can be used to estimate the channel information on the entire time-frequency resource of the PDSCH to demodulate the PDSCH.

In another optional implementation manner, in addition to the downlink control information carrying the third offset, the high-layer signaling configures a sixth offset, and the sixth offset is the EPRE of the PDSCH relative to the The offset of the EPRE of the CRS may be based on the sixth offset and the third offset to jointly determine the ratio of the energy per resource unit of the PDSCH to the energy per resource unit of the CRS.

For example, taking PDSCH as an example, taking β _{CRS to} represent the sixth offset, the relationship between PDSCH EPRE and CRS EPRE can be expressed as:

Ρ _PDSCH = Ρ _CRS + β _CRS + Δ″ (11)

Correspondingly, the ratio of the amplitude of the PDSCH to the CRS

Can be expressed as:

It can be seen that compared with the previous embodiment, the power control of the downlink data channel in this embodiment can be determined by comprehensively considering the EPRE ratio configured by the high-level signaling, the transmission layer of the downlink data channel, and the signal-to-interference and noise ratio. Compared with the prior art that can only receive the PDSCH based on the sixth offset, the power of the PDSCH can be flexibly adjusted.

Among them, the sixth offset β _CRS configured by high-layer signaling can be expressed as:

β _CRS ＝P _A +δ _power-offset (13)

or

β _CRS ＝P _A +δ _power-offset +10·log ₁₀ (2) (14)

Among them, P _A is a high-level configuration parameter, and δ _power-offset is a downlink control information indication, but this δ _power-offset is only applicable in the multi-user, multiple-input and multiple-output transmission mode, and can only be equal to 0 or -3dB. Therefore, this In the application embodiment, by introducing the aforementioned third offset Δ″, the transmission power of the downlink data channel can be flexibly adjusted in other transmission modes.

As mentioned earlier, the power control parameters of the downlink data channel that is frequency division multiplexed with the reference signal are called the first type of power control parameters; correspondingly, the power control parameters of the downlink data channel that is not frequency division multiplexed with the reference signal Called the second type of power control parameters. That is, the downlink data channel includes two types of symbols, the first type of symbols are the symbols where the downlink data channel and the reference signal are frequency division multiplexed, and the second type is the downlink data channel and the reference signal are not frequency division multiplexed. As shown in Figure 3, assuming that the number of groups without code division multiplexing with DM-RS is 0, the PDSCH and DM-RS on the third symbol are frequency-division multiplexed, and the symbols after the fourth symbol are not the same with DM. -RS frequency division multiplexing. At this time, the power control parameters of the downlink data channel on the third symbol and the power control parameters of the downlink data channel on other symbols except the third symbol can be separately indicated.

Correspondingly, the P _PDSCH in the above formulas (1) to (8) correspond to each other, and the EPRE of the PDSCH on the first type of symbol is

The EPRE of the PDSCH on the second category of symbols is

The first offset may be Δ ₁ and Δ ₂ for PDSCH on different types of symbols, and the second offset may be Δ′ ₁ and Δ′ ₂ for PDSCH on different types of symbols, correspondingly, the above The third offset can be Δ" ₁ and Δ" ₂ for PDSCHs on different types of symbols, and further, the amplitude ratios of different types of PDSCHs can be calculated respectively.

Taking the first offset as an example, the relationship between PDSCH EPRE and DM-RS EPRE shown in formula (3) can be expressed as:

Formula (4), the amplitude ratio of DM-RS to PDSCH

Can be expressed as:

Among them, for the third offset, the third offset can send Δ" ₁ and Δ" ₂ for PDSCHs on different types of symbols to indicate the power control parameters of the PDSCH on the first type of symbols and the second type of symbols. Power control parameters on the PDSCH.

Optionally, for the third offset, it may also include only the power control parameters of the PDSCH on the symbols of the second type, that is, the power control parameters of the second type, namely Δ″ ₂ , for example, the second type is calculated according to Δ″ ₂ The PDSCH on the symbol is

The first category of symbols on the PDSCH

It can be determined according to the high-level parameter P _B. For example, please refer to Table 4. As shown in Table 4, the number of CRS ports can be obtained based on P _B.

versus

The ratio between.

Table 4

In summary, the power control parameters shown in Table 4 can be added to the downlink control information, that is, at least one of the first to third offsets.

table 5

It can be seen that for PDSCH and DM-RS power control, introducing a first offset in the downlink control information to indicate the relationship between PDSCH EPRE and DM-RS EPRE, on the one hand, can achieve more refined power control with a larger dynamic range. On the other hand, the power control of PDSCH and DM-RS can not be limited by the number of DM-RS CDM groups that are not multiplexed with data, which is conducive to accurate power delivery of PDSCH and DM-RS. For PDSCH and PT-RS power control, a second offset is introduced to indicate the relationship between PT-RS EPRE and PDSCH EPRE. The second offset indication can be multiplexed with the DM-RS power offset indication, or Indicating separately in the downlink control information depends on the combined consideration of flexibility and overhead of power control in the system design. For PDSCH and CRS power control, a third offset is introduced to indicate the relationship between CRS EPRE and PDSCH EPRE. The indication of the third offset can be multiplexed with the DM-RS power offset indicator, or in the downlink control information Separately indicated in, it depends on the combined consideration of flexibility and overhead of power control in system design. For PDSCH and DM-RS/PT-RS/CRS power control, when DM-RS/PT-RS/CRS and PDSCH are frequency division multiplexed, there are DM-RS/PT-RS/ The power of each RE in the PDSCH symbol of the CRS is indicated by the power offset of each RE in the PDSCH symbol without DM-RS/PT-RS/CRS, so that the transmit power of the downlink data channel can be flexibly adjusted. Conducive to reducing the energy consumption of the base station.

The power control method of the embodiment of the present application is described in detail above with reference to Figs. 2 to 3, and the power control device of the embodiment of the present application is described in detail below with reference to Figs. 4 to 7.

Please refer to FIG. 4. FIG. 4 is a schematic structural diagram of a power control device provided by an embodiment of the present application. As shown in FIG. 4, the information transmission device may be used to implement the power control methods shown in FIGS. 2 to 3. The power control device may include:

The determining unit 401 is configured to determine the power control parameter of the downlink data channel;

The sending unit 402 is configured to send downlink control information and send a downlink data channel based on the power control parameters; the downlink control information includes the power control parameters.

In an optional implementation manner, the power control parameter includes at least one of the following:

The first offset of the energy per resource unit of the downlink data channel with respect to the energy per resource unit of the demodulation reference signal;

The second offset of the energy per resource unit of the phase tracking reference signal relative to the energy per resource unit of the downlink data channel;

The third offset of the energy per resource unit of the downlink data channel with respect to the energy per resource unit of the cell reference signal.

In an optional implementation manner, the determining unit 401 determines the power control parameter of the downlink data channel, specifically:

Determine the highest signal to interference plus noise ratio and the lowest signal to interference plus noise ratio corresponding to the downlink data channel;

Determine the power control parameter of the downlink data channel according to the difference between the highest signal to interference plus noise ratio and the lowest signal to interference plus noise ratio.

In an optional implementation manner, the power control parameters include a first type of power control parameter and a second type of power control parameter; the first type of power control parameter is related to a demodulation reference signal, a phase tracking reference signal, or The power control parameter of the downlink data channel where the cell reference signal is frequency-division multiplexed; the second type of power control parameter is that no frequency division is performed with the demodulation reference signal, the phase tracking reference signal, or the cell reference signal Power control parameters of the multiplexed downlink data channel. It can be seen that, in this implementation manner, the power control parameters of the downlink data channel that is frequency division multiplexed with the aforementioned reference signal can be different from the power control parameters of the downlink data channel that is not frequency division multiplexed with the aforementioned reference signal.

Please refer to FIG. 5. FIG. 5 is a schematic structural diagram of a power control device provided by an embodiment of the application. As shown in FIG. 5, the power control device can be used to implement the network in the power control method shown in FIGS. 2 to 3 Related functions of the device. The power control device may include:

The receiving unit 501 is configured to receive downlink control information, where the downlink control information includes power control parameters of the downlink data channel;

The receiving unit 501 is further configured to receive the downlink data channel according to the power control parameter.

In an optional implementation manner, determining the power control parameter of the downlink data channel by the network device includes:

The network device determines the first signal to interference plus noise ratio threshold, the second signal to interference plus noise ratio threshold, and the second signal to interference plus noise ratio threshold corresponding to the modulation and coding mode selected for the downlink data channel Less than the first signal to interference plus noise ratio threshold; the network device calculates the average signal to interference plus noise ratio on the time-frequency resource of the downlink data channel; the network device calculates the average signal to interference plus noise ratio based on the average signal and interference Add the difference between the noise ratio and the threshold of the second signal to interference plus noise ratio to determine the power control parameter of the downlink data channel.

Please refer to FIG. 6. FIG. 6 is a schematic structural diagram of a terminal device according to an embodiment of the application. The terminal device can be applied to the system shown in FIG. 1 to perform the functions of the terminal device in the foregoing method embodiment. For ease of description, FIG. 6 only shows the main components of the terminal device. As shown in Figure 6, the terminal equipment includes a processor, a memory, a control circuit, an antenna, and an input and output device. The processor is mainly used to process the communication protocol and communication data, and to control the entire terminal device, execute the software program, and process the data of the software program, for example, to support the terminal device to perform the actions described in the above method embodiments, such as , Receive downlink control information and downlink data channels, etc. The memory is mainly used to store software programs and data. The control circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals. The control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for ease of description, FIG. 6 only shows one memory and one processor. In an actual terminal device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.

As an optional implementation, the processor may include a baseband processor and/or a central processing unit. The baseband processor is mainly used to process communication protocols and communication data, and the central processing unit is mainly used to control the entire terminal device. , Execute the software program, and process the data of the software program. The processor in FIG. 6 can integrate the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit can also be independent processors and are interconnected by technologies such as buses. Those skilled in the art can understand that the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and various components of the terminal device may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

In the embodiment of the present application, the antenna and the control circuit with the transceiving function can be regarded as the transceiving unit 601 of the terminal device, for example, for supporting the terminal device to perform the receiving function and the transmitting function as described in FIG. 5. The processor with processing function is regarded as the processing unit 602 of the terminal device. As shown in FIG. 6, the terminal device includes a transceiver unit 601 and a processing unit 602. The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on. Optionally, the device for implementing the receiving function in the transceiver unit 601 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 601 can be regarded as the sending unit, that is, the transceiver unit 601 includes a receiving unit and a sending unit. The receiving unit may also be called a receiver, an input port, a receiving circuit, etc., and the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.

The processor 602 may be configured to execute instructions stored in the memory to control the transceiver unit 601 to receive signals and/or send signals, and complete the functions of the terminal device in the foregoing method embodiments. As an implementation manner, the function of the transceiver unit 601 may be implemented by a transceiver circuit or a dedicated chip for transceiver.

Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of the application, for example, a schematic structural diagram of a base station. The base station can be applied to the system shown in FIG. 1 to perform the functions of the network device in the foregoing method embodiment. The base station may include one or more radio frequency units, such as a remote radio unit (RRU) 701 and one or more baseband units (BBU) (also referred to as digital units, DU) 702. The RRU 701 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 7011 and a radio frequency unit 7012. The RRU 701 part is mainly used for receiving and sending radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending downlink control information and downlink data channels to terminal devices. The BBU702 part is mainly used for baseband processing and control of base stations. The RRU 701 and the BBU 702 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 702 is the control center of the base station, which may also be called a processing unit, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing unit) 702 may be used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment.

In an example, the BBU 702 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network with a single access indication (such as an LTE network), and may also support different access standards. Wireless access network (such as LTE network, 5G network or other networks). The BBU 702 further includes a memory 7021 and a processor 7022, and the memory 7021 is used to store necessary instructions and data. For example, the memory 7021 stores the confirmation information timing table in the above embodiment. The processor 7022 is used to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the network device in the foregoing method embodiment. The memory 7021 and the processor 7022 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

Please refer to FIG. 8. FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the application. The communication device can be used to implement the method described in the foregoing method embodiment, and reference may be made to the description in the foregoing method embodiment. The communication device may be a chip, network equipment (such as a base station), terminal equipment or other network equipment, etc.

The communication device includes one or more processors 801. The processor 801 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processor can be used to control communication devices (such as base stations, terminals, or chips, etc.), execute software programs, and process software program data. The communication device may include a transceiving unit to implement signal input (reception) and output (transmission). For example, the communication device may be a chip, and the transceiver unit may be an input and/or output circuit of the chip, or a communication interface. The chip can be used in a terminal or a base station or other network equipment. For another example, the communication device may be a terminal or a base station or other network equipment, and the transceiver unit may be a transceiver, a radio frequency chip, or the like.

The communication device includes one or more of the processors 801, and the one or more processors 801 can implement the method of the network device or the terminal device in the embodiments shown in FIGS. 2 to 3.

In a possible design, the communication device includes means for sending a downlink data channel. The function of determining the power control parameter of the downlink data channel may be realized by one or more processors. For example, the downlink data channel or downlink control information is sent through a transceiver, or input/output circuit, or chip interface. For the downlink data channel or downlink control information, reference may be made to the related description in the foregoing method embodiment.

In a possible design, the communication device includes means for receiving downlink data channels or downlink control information. For the receiving of the downlink data channel or downlink control information, reference may be made to the related description in the foregoing method embodiment.

Optionally, in addition to implementing the method of the embodiment shown in FIG. 2, the processor 801 may also implement other functions.

Optionally, in one design, the processor 801 may execute instructions to enable the communication device to execute the method described in the foregoing method embodiment. The instructions may be stored in the processor in whole or in part, such as the instruction 803, or may be stored in the memory 802 coupled to the processor in whole or in part, such as the instruction 804, or the

instructions

803 and 804 may be used together to make The communication device executes the method described in the above method embodiment.

In another possible design, the communication device may also include a circuit, and the circuit may implement the function of the network device or the terminal device in the foregoing method embodiment.

In another possible design, the communication device may include one or more memories 802, on which instructions 804 are stored, and the instructions may be executed on the processor, so that the communication device executes the above method The method described in the examples. Optionally, data may also be stored in the memory. The optional processor may also store instructions and/or data. For example, the one or more memories 802 may store the corresponding relationship described in the foregoing embodiment, or related parameters or tables involved in the foregoing embodiment. The processor and memory can be provided separately or integrated together.

In another possible design, the communication device may further include a transceiver unit 805 and an antenna 808. The processor 801 may be referred to as a processing unit, which controls a communication device (terminal or base station). The transceiver unit 805 may be called a transceiver, a transceiver circuit, or a transceiver, etc., and is used to implement the transceiver function of the communication device through the antenna 806.

The present application also provides a communication system, which includes the aforementioned one or more network devices, and, one or more terminal devices.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

The embodiment of the present application also provides a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, the power control method described in any of the foregoing method embodiments is implemented.

The embodiments of the present application also provide a computer program product, which, when executed by a computer, implements the power control method described in any of the foregoing method embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (for example, coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a high-density digital video disc (Digital Video Disc, DVD)), or a semiconductor medium (for example, a solid state disk (Solid State Disk, SSD)) etc.

An embodiment of the present application also provides a processing device, including a processor and an interface; the processor is configured to execute the power control method described in any of the foregoing method embodiments.

It should be understood that the foregoing processing device may be a chip, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software, At this time, the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory. The memory may be integrated in the processor, may be located outside the processor, and exist independently.

It should be understood that “one embodiment” or “an embodiment” mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Therefore, the appearance of "in one embodiment" or "in an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that, in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application. The implementation process constitutes any limitation.

In addition, the terms "system" and "network" in this article are often used interchangeably in this article. The term "and/or" in this article is only an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

It should be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, and B can also be determined according to A and/or other information.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two, in order to clearly illustrate the hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described in terms of function. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

Through the description of the foregoing implementation manners, those skilled in the art can clearly understand that this application can be implemented by hardware, firmware, or a combination thereof. When implemented by software, the above functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium. The computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another. The storage medium may be any available medium that can be accessed by a computer. Take this as an example but not limited to: computer readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store instructions or data structures The desired program code and any other medium that can be accessed by the computer. In addition. Any connection can suitably become a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , Fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless and microwave are included in the fixing of the media. As used in this application, Disk and disc include compact discs (CD), laser discs, optical discs, digital versatile discs (DVD), floppy discs and Blu-ray discs. Disks usually copy data magnetically, while discs The laser is used to optically copy data. The above combination should also be included in the protection scope of the computer-readable medium.

In short, the above descriptions are only preferred embodiments of the technical solutions of the present application, and are not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A power control method, characterized by comprising:

The network equipment determines the power control parameters of the downlink data channel;

The network device sends downlink control information, and sends a downlink data channel based on the power control parameter;

The downlink control information includes the power control parameter.
The method according to claim 1, wherein the power control parameter includes at least one of the following:

The first offset of the energy per resource unit of the downlink data channel with respect to the energy per resource unit of the demodulation reference signal;

The second offset of the energy per resource unit of the phase tracking reference signal relative to the energy per resource unit of the downlink data channel;

The third offset of the energy per resource unit of the downlink data channel with respect to the energy per resource unit of the cell reference signal.
The method according to claim 1 or 2, wherein the network device determining the power control parameter of the downlink data channel comprises:

The network device determines the first signal to interference plus noise ratio threshold, the second signal to interference plus noise ratio threshold, and the second signal to interference plus noise ratio threshold corresponding to the modulation and coding mode selected for the downlink data channel Less than the first signal to interference plus noise ratio threshold;

Calculating, by the network device, an average signal to interference plus noise ratio on the time-frequency resource of the downlink data channel;

The network device determines the power control parameter of the downlink data channel according to the difference between the average signal to interference plus noise ratio and the second signal to interference plus noise ratio threshold.
The method according to any one of claims 1 to 3, characterized in that:

The power control parameters include a first type of power control parameter and a second type of power control parameter;

The first type of power control parameter is a power control parameter of a downlink data channel that is frequency division multiplexed with a demodulation reference signal, a phase tracking reference signal, or a cell reference signal;

The second type of power control parameter is a power control parameter of a downlink data channel that is not frequency-division multiplexed with the demodulation reference signal, the phase tracking reference signal, or the cell reference signal.
A power control method, characterized by comprising:

The terminal device receives downlink control information, where the downlink control information includes power control parameters of the downlink data channel;

The terminal device receives the downlink data channel according to the power control parameter.
The method according to claim 5, wherein the power control parameter comprises at least one of the following:

The first offset of the energy per resource unit of the demodulation reference signal relative to the energy per resource unit of the downlink data channel;

The second offset of the energy per resource unit of the phase tracking reference signal relative to the energy per resource unit of the downlink data channel;

The third offset of the energy per resource unit of the downlink data channel with respect to the energy per resource unit of the cell reference signal.
The method according to claim 5 or 6, wherein the power control parameters of the downlink data channel include a first type of power control parameter and a second type of power control parameter;

The first type of power control parameter is a power control parameter of a downlink data channel that is frequency division multiplexed with a demodulation reference signal, a phase tracking reference signal, or a cell reference signal;

The second type of power control parameter is a power control parameter of a downlink data channel that is not frequency-division multiplexed with the demodulation reference signal, the phase tracking reference signal, or the cell reference signal.
A power control device, characterized by comprising:

The determining unit is used to determine the power control parameter of the downlink data channel;

A sending unit, configured to send downlink control information, and send a downlink data channel based on the power control parameter;

The downlink control information includes the power control parameter.
The power control device according to claim 8, wherein the power control parameter comprises at least one of the following:

The first offset of the energy per resource unit of the demodulation reference signal relative to the energy per resource unit of the downlink data channel;

The second offset of the energy per resource unit of the phase tracking reference signal relative to the energy per resource unit of the downlink data channel;

The third offset of the energy per resource unit of the downlink data channel with respect to the energy per resource unit of the cell reference signal.
The power control device according to claim 8 or 9, wherein the determining unit determines the power control parameter of the downlink data channel, specifically:

Determine the first signal-to-interference-plus-noise ratio threshold and the second-signal-to-interference-to-noise ratio threshold corresponding to the modulation and coding mode selected for the downlink data channel, where the second signal-to-interference-to-noise ratio threshold is less than all The first signal to interference plus noise ratio threshold;

Calculating an average signal to interference plus noise ratio on the time-frequency resource of the downlink data channel;

Determine the power control parameter of the downlink data channel according to the difference between the average signal to interference plus noise ratio and the second signal to interference plus noise ratio threshold.
The power control device according to any one of claims 8 to 10, wherein:

The power control parameters include a first type of power control parameter and a second type of power control parameter;

The first type of power control parameters are power control parameters of downlink data channels that are frequency division multiplexed with demodulation reference signals, phase tracking reference signals, or cell reference signals;

The second type of power control parameter is a power control parameter of a downlink data channel that is not frequency-division multiplexed with the demodulation reference signal, the phase tracking reference signal, or the cell reference signal.
A power control device, characterized by comprising:

A receiving unit, configured to receive downlink control information, where the downlink control information includes power control parameters of the downlink data channel;

The receiving unit is further configured to receive the downlink data channel according to the power control parameter.
The power control device according to claim 5, wherein the power control parameter comprises at least one of the following:

The first offset of the energy per resource unit of the demodulation reference signal relative to the energy per resource unit of the downlink data channel;

The second offset of the energy per resource unit of the phase tracking reference signal relative to the energy per resource unit of the downlink data channel;

The third offset of the energy per resource unit of the downlink data channel with respect to the energy per resource unit of the cell reference signal.
The power control device according to claim 12 or 13, wherein the power control parameters include a first type of power control parameter and a second type of power control parameter;

The first type of power control parameter is a power control parameter of a downlink data channel that is frequency division multiplexed with a demodulation reference signal, a phase tracking reference signal, or a cell reference signal;

The second type of power control parameter is a power control parameter of a downlink data channel that is not frequency-division multiplexed with the demodulation reference signal, the phase tracking reference signal, or the cell reference signal.
A device, characterized by comprising: a processor, which is coupled with a memory;

Memory, used to store computer programs;

The processor is configured to execute the computer program stored in the memory, so that the device executes the method according to any one of claims 1-4.
A device characterized by comprising: a processor, a memory and a transceiver;

The memory is used to store computer programs;

The processor is configured to execute a computer program stored in the memory, so that the device executes the method according to any one of claims 5 to 7.
A processor, characterized in that the processor comprises: at least one circuit for executing the method according to any one of claims 1-4 or 5-7.
A readable storage medium, characterized by comprising a program or instruction, when the program or instruction runs on a computer, the method according to any one of claims 1-4 or 5-7 is executed.
A computer program, which is characterized by comprising a program or an instruction, when the program or an instruction runs on a computer, the method according to any one of claims 1-4 or 5-7 is executed.
A power control system, characterized in that the system comprises the power control device according to any one of claims 8 to 11 and the power control device according to any one of claims 12 to 14;

or,

The system includes the device according to claim 15 and the device according to claim 16.