A power control method and device

Abstract

A power control method and device can improve the accuracy of terminal equipment in determining the transmission power in a scenario of coordinated transmission of multiple transmission receiving points. The method is applied to a terminal that has the ability to support and / or is configured with multiple control resource set group indexes. The method includes: receiving a first physical downlink control channel (S501) sent by a network device, the first physical downlink control channel carrying a power offset corresponding to the physical downlink control channel. Determining the transmission power (S502) according to the power control process corresponding to the network device, the power control process is used to accumulate the power offset indicated by the network device, and determining the transmission power of the physical downlink control channel according to the accumulation result. Sending the physical downlink control channel to the network device using the transmission power (S503). By independently accumulating the power offsets from the same network device, the transmission power of the PUSCH can be consistent with the indication of the network device.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a power control method and device. Background Art

[0002] The physical uplink shared channel (PUSCH) is an uplink signal sent by the user equipment (UE), and the transmission power of PUSCH can be controlled by the base station. For example, the base station can instruct the UE to reduce the transmission power when the PUSCH power sent by the UE is high, and conversely, it can instruct the UE to increase the transmission power when the PUSCH power sent by the UE is low. The behavior of the base station controlling the transmission power of the terminal device can be called closed-loop power control. Closed-loop power control can be dynamically indicated based on downlink control information (DCI), which carries a power offset.

[0003] In a scenario where a transmission reception point (TRP) is independently scheduled at any timing, when the UE sends a PUSCH, it can add the power offset indicated in the DCI corresponding to this PUSCH to the most recent transmit power to determine the transmit power of the PUSCH. For example, if the most recent transmit power is P, and the DCI indicates that the power offset when the UE sends a PUSCH in sloti+2 is +1, then the transmit power corresponding to the PUSCH is P+1. However, in a scenario where two or more TRPs are independently scheduled at any timing, there is currently no good solution for how the UE determines the transmit power. Summary of the invention

[0004] The embodiments of the present application provide a power control method and apparatus, chip, computer-readable storage medium, computer program product, etc., which can improve the accuracy of terminal equipment in determining the transmission power in a multi-TRP collaborative transmission scenario.

[0005] In the first aspect, an embodiment of the present application provides a power control method, which can be applied to a terminal side, such as a terminal device, or a chip or chipset in a terminal device, wherein the terminal has the ability to support being configured with multiple control resource sets (CORESET) group indexes, or the terminal is configured with multiple CORESET group indexes, or the terminal has the ability to support being configured with multiple CORESET group indexes and is configured with multiple CORESET group indexes. The method includes: receiving a first physical downlink control channel (PDCCH) sent by a network device, the first PDCCH carrying a power offset corresponding to a PUSCH. Determine the transmit power according to the power control process corresponding to the network device, the power control process is used to accumulate the power offset carried by the PDCCH from the network device, and determine the transmit power of the PUSCH according to the accumulated result. Use the transmit power to send the PUSCH to the network device.

[0006] In the embodiment of the present application, by associating the network device with the power control process, the power control process can accumulate the power offset from the same network device, so that the transmission power of the PUSCH can be consistent with the indication of the network device, thereby improving the reliability of the uplink transmission.

[0007] In a possible design, the power control process may have a corresponding relationship with the CORESET group corresponding to the first PDCCH. The above design can achieve independent accumulation of power offsets scheduled by the same CORESET group by associating the power control process with the CORESET group corresponding to the PDCCH.

[0008] In one possible design, before determining the transmit power according to the power control process corresponding to the network device, a second PDCCH sent by the network device may be received, the second PDCCH carrying indication information of the power control process, the indication information being used to indicate that there is a corresponding relationship between the power control process and the CORESET group corresponding to the second PDCCH, and the second PDCCH and the first PDCCH correspond to the same CORESET group. In the above design, the association relationship between the power control process and the network device may be indicated by the network device, thereby further improving the accuracy of the transmit power.

[0009] In a possible design, the indication information of the power control process may be a sounding reference signal resource indication (SRSresource indicator, SRI), and the value of the SRI corresponds to the index of the power control process.

[0010] In one possible design, the indication information of the power control process may be an index of the power control process.

[0011] In a possible design, the value of SRI corresponds to a set of power control parameters used by the power control process.

[0012] In one possible design, before determining the transmission power according to the power control process corresponding to the network device, it can be determined to send feedback information of PDSCH from different network devices on different physical uplink control channels PUCCH. Through the above design, the terminal device can implement the power control method provided in this application when the feedback mode is independent feedback.

[0013] In a second aspect, the present application provides a power control device, which may be a terminal device or a chip or chipset in a terminal device. The device may include a processing module and a transceiver module. When the device is a terminal device, the processing module may be a processor, and the transceiver module may be a transceiver; the device may also include a storage module, and the storage module may be a memory; the storage module is used to store instructions, and the processing module executes the instructions stored in the storage module so that the terminal device performs the corresponding functions in the above-mentioned first aspect. When the device is a chip or chipset in a terminal device, the processing module may be a processor, a processing circuit or a logic circuit, etc., and the transceiver module may be an input / output interface, a pin or a circuit, etc.; the processing module executes the instructions stored in the storage module so that the terminal device performs the corresponding functions in the above-mentioned first aspect. The storage module may be a storage module in the chip or chipset (for example, a register, a cache, etc.), or a storage module in the base station located outside the chip or chipset (for example, a read-only memory, a random access memory, etc.).

[0014] In a third aspect, a power control device is provided, comprising: a processor. Optionally, a communication interface and / or a memory is further included. The communication interface is used to transmit information, and / or messages, and / or data between the device and other devices. The memory is used to store computer-executable instructions. When the device is running, the processor executes the computer-executable instructions stored in the memory, so that the device executes the method described in the first aspect or any one of the designs of the first aspect.

[0015] In a fourth aspect, an embodiment of the present application provides a computer storage medium, which stores program instructions. When the program instructions are executed on a communication device, the communication device executes the method described in the first aspect of the embodiment of the present application and any possible design thereof.

[0016] In a fifth aspect, an embodiment of the present application provides a computer program product. When the computer program product runs on a communication device, the communication device implements the method described in the first aspect of the embodiment of the present application and any possible design thereof.

[0017] In a sixth aspect, an embodiment of the present application provides a chip, which is coupled to a memory and executes the method described in the first aspect of the embodiment of the present application and any possible design thereof.

[0018] In a seventh aspect, an embodiment of the present application provides a chip, comprising a communication interface and at least one processor, wherein the processor operates to execute the method described in the first aspect of the embodiment of the present application or any one of the designs in the first aspect.

[0019] It should be noted that, in the embodiments of the present application, “coupling” refers to two components being directly or indirectly coupled to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of multi-TRP collaboration provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of a PDCCH scheduling timing provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of power control in a multi-TRP collaboration scenario provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of a power control method provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the structure of a power control device provided in an embodiment of the present application;

[0026] Figure 7 A schematic diagram of the structure of a power control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] To facilitate understanding of the embodiments of the present application, the following terms related to the embodiments of the present application are introduced:

[0028] 1. CORESET

[0029] In order to improve the efficiency of blind detection of control channels by terminal devices, the concept of control resource sets was proposed during the formulation of the new radio (NR) standard. The network device can configure one or more resource sets for the terminal device for sending PDCCH. The network device can send a control channel to the terminal device on any control resource set corresponding to the terminal device. In addition, the network device also needs to notify the terminal device of other configurations associated with the control resource set, such as a search space set (search space set), etc. There are differences in the configuration information of each control resource set, such as differences in frequency domain width, time domain length, etc. Expandably, the control resource set in this application can be a CORESET or control region (control region) or enhanced physical downlink control channel (enhanced-physical downlink control channel, ePDCCH) set (set) defined by the 5G mobile communication system.

[0030] The time-frequency position occupied by the PDCCH can be called the downlink control region. In LTE, the PDCCH is always located in the first m (possible values ​​of m are 1, 2, 3 and 4) symbols of a subframe.

[0031] In NR, the downlink control area can be flexibly configured by RRC signaling through CORESET and search space set:

[0032] The control resource set can configure the frequency domain position of the PDCCH or control channel element (CCE), the number of continuous symbols in the time domain, and other information;

[0033] The search space set can configure information such as the detection period and offset of the PDCCH, the starting symbol in a time slot, etc.

[0034] For example, the search space set may configure the PDCCH period to be 1 time slot, and the time domain start symbol to be symbol 0, so the terminal device may detect the PDCCH at the start position of each time slot.

[0035] 2. Search space

[0036] The search space defines the possibility of detecting PDCCH in the time domain. The base station can configure the UE with the search space identifier, the identifier of its associated CORESET, the detection time unit period and time unit offset of PDCCH, the time domain detection pattern, the number of possible PDCCH candidates for each aggregation level (which may include 0), the type of search space (indicating whether it is public or UE-specific, public means that other users can detect this search space), the configuration related to the DCI format (such as the format possibility of the DCI to be detected), and the continuous length.

[0037] The time domain detection pattern is used to indicate the symbol position where the UE may detect the PDCCH in a time slot. For example, the time domain detection pattern may indicate one or more symbol positions. These symbol positions correspond to the first symbol position where the PDCCH may start. For example, the time domain detection pattern may indicate symbol positions l1, l2, and l3, then the UE may detect the PDCCH at positions starting with l1, l2, and l3, respectively.

[0038] The number of possible PDCCH candidates for each aggregation level (including 0) refers to the number of possible PDCCH candidates that the base station can configure for the UE in a search space, if it corresponds to different aggregation levels 1, 2, 4, 8, 16.

[0039] The continuous length refers to the continuous length of the search space in the time domain time unit. Taking the time slot as an example, if the configured period is k and the continuous length is d, it means that starting from a time slot that meets the period and offset of the search space, the PDCCH can be detected in this search space for d consecutive slots.

[0040] It should be noted that with the continuous development of technology, the terms of the embodiments of the present application may change, but they are all within the scope of protection of the present application.

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0042] The communication method provided in the present application can be applied to various communication systems, for example, it can be the Internet of Things (IoT), narrowband Internet of Things (NB-IoT), long term evolution (LTE), or the fifth generation (5G) communication system, or a hybrid architecture of LTE and 5G, or a 5G NR system, and new communication systems that will emerge in the future development of communication. The 5G communication system described in the present application may include at least one of a non-standalone (NSA) 5G communication system and a standalone (SA) 5G communication system. The communication system may also be a public land mobile network (PLMN) network, a device-to-device (D2D) network, a machine-to-machine (M2M) network, or other networks.

[0043] Figure 1 A communication system 100 applicable to an embodiment of the present application is shown. The communication system 100 is in a dual connectivity (DC) or coordinated multi-point (CoMP) scenario, and the communication system 100 includes a network device 110, a network device 120, and a terminal device 130. The network device 110 may be a network device when the terminal device 130 initially accesses, and is responsible for RRC communication with the terminal device 130. The network device 120 is added during RRC reconfiguration to provide additional wireless resources. The terminal device 130 configured with carrier aggregation (CA) is connected to the network device 110 and the network device 120. The link between the network device 110 and the terminal device 130 may be referred to as a first link, and the link between the network device 120 and the terminal device 130 may be referred to as a second link.

[0044] The above communication system applicable to the embodiment of the present application is only an example, and the communication system applicable to the embodiment of the present application is not limited thereto. For example, the number of network devices and terminal devices included in the communication system can also be other numbers, or a single base station, multi-carrier aggregation scenario, dual link scenario or D2D communication scenario, CoMP scenario is adopted. Among them, CoMP can be one or more scenarios of non-coherent joint transmission (NCJT), coherent joint transmission (CJT), joint transmission (JT), etc.

[0045] The terminal device involved in the embodiments of the present application is an entity on the user side for receiving or transmitting signals. The terminal device can be a device that provides voice and data connectivity to users, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device can also be called a wireless terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a user equipment, etc. The terminal device can be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges language and data with a wireless access network. For example, the terminal device may also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and other devices. Common terminal devices include, for example, mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, such as smart watches, smart bracelets, pedometers, etc., but the embodiments of the present application are not limited thereto. The terminal devices involved in the embodiments of the present application may also be terminal devices that appear in the future evolved PLMN, etc., and the embodiments of the present application are not limited thereto.

[0046] In addition, in the embodiment of the present application, the terminal device can also be a terminal device in an IoT system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection. In the embodiment of the present application, IoT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, narrow band (NB) technology.

[0047] In addition, in an embodiment of the present application, the terminal device may also include sensors such as smart printers, train detectors, and gas stations. Its main functions include collecting data (partial terminal devices), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.

[0048] The network device involved in the embodiment of the present application is an entity on the network side for transmitting or receiving signals. The network device in the embodiment of the present application may be a device in a wireless network, such as a RAN node that accesses a terminal to a wireless network. For example, the network device may be an evolutionary Node B (eNB or e-NodeB) in LTE, or a new radio controller (NR controller), a gNode B (gNB) in a 5G system, a centralized unit (CU), a new wireless base station, a radio frequency remote module, a micro base station, a relay, a distributed unit (DU), a home base station, a transmission reception point (TRP) or a transmission point (TP) or any other wireless access device, but the embodiment of the present application is not limited thereto. The network device may cover one or more cells.

[0049] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0050] In order to improve spectrum utilization, modern communication systems often use co-frequency deployment as the main method. That is, multiple cells in the network can be deployed in the same frequency band. In this way, the terminal device may receive signals from multiple cells. Then, when the terminal device is in an edge area, it may be interfered by signals from neighboring cells outside the cell, resulting in poor channel conditions. In order to better solve the interference between cells and improve user rates, CoMP can be widely used.

[0051] Network devices cooperate by exchanging information, which can effectively avoid interference and improve the rate. Multiple TRPs can cooperate to provide downlink services for terminal devices, or can cooperate to receive uplink signals from terminal devices. Collaboration technologies mainly include JT, dynamic cell / point selection (DCS / DPS), coordinated beamforming / scheduling (CB / CS), etc. Figure 2 As shown, the solid arrows represent the interference generated to the terminal device, and the dotted arrows represent the useful data generated to the terminal device. In a non-cooperative scenario, the edge terminal device receives the signal of the cell and is interfered by the neighboring cell; in the JT technology, multiple cells jointly send data to the terminal device, and the terminal device receives multiple copies of useful data, thereby increasing the transmission rate; in the coordinated scheduling coordinated beamforming (CSCB) technology, the interference of neighboring cells is coordinated, such as the neighboring cell can adjust the transmitted signal to avoid sending signals to the terminal device in the direction of strong interference, thereby reducing the interference level of the terminal device; in the DPS / DCS technology, the network dynamically selects a better transmission point to serve the terminal device, so that the terminal device can ensure that it is under a stronger cell signal, while the weaker cell signal becomes interference. By utilizing the difference in the channels of multiple TRPs, the signal-to-noise ratio of the terminal device can be improved.

[0052] In the multi-TRP cooperative transmission scenario, multiple TRPs can schedule users independently. According to the 3GPP R15 protocol, for two hybrid automatic repeat request (HARQ) processes in a scheduling cell, if the UE is scheduled by the first PDCCH for the first PUSCH, then the UE cannot be scheduled by the second PDCCH later than the first PDCCH to send the second PUSCH earlier than the first PUSCH, for example, Figure 3 That is, if the second PDCCH of the UE is received after the first PDCCH in time, the second PUSCH scheduled by the second PDCCH shall not be earlier than the first PUSCH scheduled by the first PDCCH.

[0053] The timing relationship K2 between the PUSCH scheduled by the PDCCH and the PDCCH may be indicated by the base station. The timing relationship K2 refers to the time offset from when the UE receives the PDCCH to when it sends the PUSCH.

[0054] by Figure 3For example, if the first PDCCH is sent in slot 1 and K2=2, the first PUSCH is sent in slot 3. If the second PDCCH is sent in slot 2, the second PUSCH scheduled by it must be later than the last symbol of the first PUSCH. Therefore, the base station must ensure that the K2 value of the second PDCCH cannot be less than the K2 value of the first PDCCH. For example, the K2 of the second PDCCH can be equal to 2, so that the second PUSCH is sent in slot 4. In a multi-TPR collaborative transmission scenario, if the first PDCCH and the second PDCCH come from two TRPs respectively, in order to meet this restriction, the two TRPs need to communicate very closely, for example, they need to know each other's K2 indication when scheduling the UE to ensure that the UE can process it. This places very high requirements on the delay of communication between TRPs.

[0055] However, in actual networks, TRPs may not necessarily be able to communicate in real time. For example, the interaction delay between TRPs may be 0-5ms or 15-20ms. For some actual deployment scenarios, there will be great scheduling restrictions. To address this issue, the UE can meet the timing restrictions mentioned above when identifying that the DCI comes from the same TRP. That is, if the first PDCCH and the second PDCCH of the UE are from the same TRP, and the second PDCCH of the UE is received after the first PDCCH in time, then the second PUSCH scheduled by the second PDCCH shall not be earlier than the first PUSCH scheduled by the first PDCCH. If the DCI comes from different TRPs, the timing restrictions mentioned above may not be met. The second PDCCH of the UE is received after the first PDCCH in time, and the second PUSCH scheduled by the second PDCCH may be earlier than the first PUSCH scheduled by the first PDCCH, or later than the first PUSCH, or the second PUSCH may be in the same time slot as the first PUSCH. In this way, the two TRPs can be freely scheduled without real-time communication.

[0056] The above time slots are merely examples of the concept of time. It should be understood that the concept of time in the present application may also be symbols, frames, etc.

[0057] The transmission power of PUSCH can be controlled by the base station. For example, when the PUSCH power transmitted by the UE is high, the base station can instruct the UE to reduce the transmission power. Conversely, when the PUSCH power transmitted by the UE is low, the base station can instruct the UE to increase the transmission power. The behavior of the base station controlling the transmission power of the terminal device can be called closed-loop power control. Closed-loop power control can be based on dynamic indications of DCI, which carries a power offset.

[0058] In the scenario where a TRP is independently scheduled at any time, when the UE sends a PUSCH, it can add the power offset indicated in the DCI corresponding to this PUSCH to the most recent transmit power to determine the transmit power of the PUSCH. For example, if the most recent transmit power is P, and the DCI indicates that the power offset when the UE sends a PUSCH in slot i+2 is +1, then the transmit power corresponding to the PUSCH is P+1. However, in the scenario where two or more TRPs are independently scheduled at any time, there is currently no good solution for how the UE determines the transmit power.

[0059] When two or more TRPs are scheduled independently at any time, if the UE still uses the power control method in one TRP scenario, some problems may occur. For example, the transmit power used by the UE to determine the transmit power of the PUSCH may be different from the transmit power used by the base station when indicating the transmit power of the PUSCH through the DCI. Figure 4As shown, the transmit power of PUSCH 0 sent by the UE on solt n is f(n). The UE receives PDCCH 1 on solt n+1, which is used to indicate that PUSCH 1 is sent on solt n+4, and the power offset indicated by PDCCH 1 is +3. The UE receives PDCCH 2 on solt n+2, which is used to indicate that PUSCH 2 is sent on solt n+3, and the power offset indicated by PDCCH 2 is +1. The UE sends PUSCH 2 on solt n+3, and the transmit power of PUSCH 2 is the transmit power of the most recently sent PUSCH (i.e., PUSCH0) plus the power offset indicated by PDCCH 2, i.e., the transmit power of PUSCH 2 is f(n)+1. The UE sends PUSCH 1 on soltn+4, and the transmit power of PUSCH 1 is the transmit power of the most recently transmitted PUSCH (i.e., PUSCH 2) plus the power offset indicated by PDCCH 1, i.e., the transmit power of PUSCH 1 is f(n)+1+3. However, when the base station sends PDCCH 1, the most recently transmitted PUSCH by the UE is PUSCH 0 transmitted on solt n, so the base station uses the power offset indicated by the transmit power f(n) of PUSCH 0, i.e., the transmit power of PUSCH 1 indicated by the base station is f(n)+3. Since the transmit power used by the UE to determine the transmit power of the PUSCH is different from the transmit power used by the base station to indicate the transmit power of the PUSCH through the DCI, the transmit power used by the UE to send PUSCH 1 is inconsistent with the transmit power indicated by the base station, which leads to problems with the power management of the base station. For example, if the UE transmit power is too high, it will interfere with other users. If the transmit power is too low, it will lead to insufficient received signal-to-noise ratio (SNR), mismatch of data modulation and coding scheme (MCS), etc.

[0060] Based on this, the embodiment of the present application provides a power control method and device, which can improve the accuracy of PUSCH power control in multi-TRP transmission scenarios. Among them, the method and the device are based on the same inventive concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0061] In the embodiment of the present application, the time domain / time unit may be a frame, a radio frame, a system frame, a subframe, a half frame, a time slot, a mini time slot, a symbol, etc. Data may refer to a codeword, a transport block, a code block, or a code block group.

[0062] It should be understood that in the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c can be single or multiple.

[0063] In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order, nor do they represent number.

[0064] The method provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0065] See also Figure 5 , which is a flow chart of a power control method provided by the present application. The method can be applied to a terminal device or a chip in a terminal device or a chipset in a terminal device, etc., wherein the terminal device has the ability to support being configured with multiple CORESET group indexes, or the terminal device is configured with multiple CORESET group indexes, or the terminal device has the ability to support being configured with multiple CORESET group indexes and is configured with multiple CORESET group indexes.

[0066] Among them, the terminal device has the ability to support being configured with multiple CORESET group indexes, which can be understood as that the terminal device supports at least 2 CORESETs and supports at least 1 CORESEET to be configured as the same CORESET group index (CORESETPool Index). For example, the terminal device supports 4 CORESETs, and the CORESET Pool Index of 2 of them is the same.

[0067] The terminal device is configured with multiple CORESET group indexes, which can be understood as the base station having at least one of the following configurations for the terminal device:

[0068] The base station is configured with at least two CORESET Pool Indexes with different values. For example, if the base station is configured with four CORESETs, the CORESET Pool Indexes corresponding to the first and second CORESETs are configured with a value of 0, and the CORESET Pool Indexes corresponding to the third and fourth CORESETs are configured with a value of 1.

[0069] The base station configures at least one CORESET of the CORESET Pool Index as the default value, while the CORESET Pool Index of other CORESETs is different from the default value. For example, the base station configures 4 CORESETs, among which the first CORESET and the second CORESET are not configured with the CORESET Pool Index parameter, and the corresponding CORESET Pool Index default value is considered to be 0, and the CORESET Pool Index corresponding to the third CORESET and the fourth CORESET is configured as 1;

[0070] The CORESET Pool Index of a part of CORSETs configured in the base station is the default value, the CORESET Pool Index of another part of CORSETs is configured equal to the default value, and the CORESET Pool Index of another part of CORSETs is different from the default value. For example, the base station is configured with 4 CORESETs, of which the first CORESET is not configured with the CORESET Pool Index parameter, and its corresponding CORESET Pool Index default value is considered to be 0, the CORESET Pool Index corresponding to the second CORESET is configured as 0, and the CORESET Pool Index corresponding to the third and fourth CORESETs is configured as 1.

[0071] Among them, the terminal device is configured with multiple CORESET group indexes, which can be configured with multiple CORESET group indexes for the currently activated bandwidth part (bandwidth part, BWP), or, it can also be configured with multiple CORESET group indexes for all configured bandwidth parts in a service cell, or, it can also be configured with multiple CORESET group indexes for any configured bandwidth part in a service cell.

[0072] The following describes the method using a terminal device as an example, including:

[0073] S501, for each network device among a plurality of network devices, a terminal device receives a first PDCCH sent by the network device, where the first PDCCH carries a power offset corresponding to a PUSCH.

[0074] S502, the terminal device determines the corresponding transmission power according to the power control process corresponding to the network device, the power control process corresponding to the network device is used to accumulate the power offset carried by the PDCCH from the network device, and determines the transmission power of the PUSCH according to the accumulation result.

[0075] It should be noted that the terminal device does not need to identify whether the network device is network device 1 or network device 2, but can distinguish them through configuration information. Taking the high-level parameter index as an example, assuming that for CORESET1 and CORESET2, it can be assumed that the transmission of the PDCCH associated with CORESET1 is the same network device, and the transmission of the PDCCH associated with CORESET2 is the same network device, so as to distinguish the network devices.

[0076] The power control process is associated with the network device, or it can be understood that the power control process is associated with the configuration information of the PDCCH, such as the power control process is associated with the configuration information of the CORESET group corresponding to the PDCCH, or the power control process is associated with the CORESET group corresponding to the PDCCH. CORESETs with the same configuration index can belong to the same CORESET group.

[0077] In an exemplary description, the power control process corresponding to the network device may have a corresponding relationship with the CORESET group corresponding to the first PDCCH. In an implementation manner, the terminal device may determine the power control process corresponding to the network device according to the CORESET group corresponding to the first PDCCH.

[0078] Exemplarily, the transmission power determined by the power control process corresponding to the network device may satisfy the following formula, or it may be understood that the power control process may also determine the transmission power by the following formula:

[0079]

[0080] Where P is the transmit power, P CMAX is the maximum transmit power. P0 is the reference power density, which can also be understood as the expected receiving power density level of the network device. μ is a parameter related to the parameter set (numerology), which can include subcarrier spacing, cyclic prefix length, etc. M is the bandwidth of PUSCH. α is the path loss compensation factor. PL is the path loss, where PL can be measured by the terminal device by receiving the downlink signal. Δ is the adjustment factor of the PUSCH code rate, and f is the closed-loop power adjustment value, where, when the power adjustment mode is cumulative, f is the cumulative value of the power offset indicated by the network device before the first PDCCH.

[0081] In one implementation, the terminal device may be configured with one or more sets of power control parameters, and the power control parameters may include at least one of the following parameters: maximum transmit power, reference power density, PUSCH bandwidth, path loss compensation factor, and PUSCH code rate adjustment factor.

[0082] If the terminal device is configured with a set of power control parameters, the power control processes corresponding to different network devices can use the same power control parameters, but the power control processes corresponding to each network device independently accumulate the power offset. For example, the power control processes corresponding to network devices 1 to 3 use the same power control parameters, but the power control process corresponding to network device 1 accumulates the power offset indicated by network device 1, the power control process corresponding to network device 2 accumulates the power offset indicated by network device 2, and the power control process corresponding to network device 3 accumulates the power offset indicated by network device 3.

[0083] If the terminal device is configured with multiple sets of power control parameters, when the association relationship between SRI and the power control parameters is not configured, the terminal device can use one set of power control parameters from the multiple sets of power control parameters by default, and the power control processes corresponding to different network devices can all use the default power control parameters.

[0084] When the association between SRI and power control parameters is configured, the terminal device can determine the power control parameters used by the corresponding power control process according to the SRI value indicated by the network device. For example, assuming that the SRI value indicated by network device 1 is 0, the power control process corresponding to the network device can use the power control parameters corresponding to SRI = 0. In one implementation, the network device can indicate SRI to the terminal device through the SRI field of DCI.

[0085] In one possible implementation, the association between the network device and the power control process can be determined by the terminal device. For example, the terminal device determines power control process 1 for network device 1, and the power control process 1 accumulates the power offset indicated by network device 1; the terminal device determines power control process 2 for network device 2, and the power control process 2 accumulates the power offset indicated by network device 2, and so on.

[0086] In another possible implementation, the association relationship between the network device and the power control process may also be indicated by the network device. For example, before sending the first PDCCH, the network device sends a second PDCCH to the terminal device. The second PDCCH and the first PDCCH correspond to the same CORESET group, and the second PDCCH carries indication information of the power control process, so that the terminal device can associate the power control process indicated by the indication information with the CORESET group corresponding to the second PDCCH (i.e., the CORESET group corresponding to the first PDCCH).

[0087] Exemplarily, the indication information may directly indicate the power control process. For example, the indication information may be information such as an index or an identifier of the power control process.

[0088] Alternatively, the indication information may also indirectly indicate the power control process. For example, the indication information may be an SRI, and the value of the SRI corresponds to the index of the power control process. In one implementation, the network devices may coordinate to determine the value of the SRI that each may use. The value of the SRI may be one or more, for example, a range of values.

[0089] In one implementation, if the indication information is SRI, the SRI field of the DCI carried by the second PDCCH may carry the indication information.

[0090] S503, the terminal device sends PUSCH to the network device using the transmission power.

[0091] In some embodiments, the power control method provided in the present application can be implemented in a specific feedback mode, for example, it can be implemented in a separate feedback mode. Separate feedback means that the terminal device will feed back the ACK / NACK feedback information of the data scheduled by multiple network devices through different PUCCHs. In the above manner, when the feedback mode is joint feedback, the terminal device can accumulate the power offsets across network devices. Joint feedback means that the terminal device will feed back the ACK / NACK feedback information of the data scheduled by multiple network devices in one PUCCH. When the feedback mode is separate feedback, the power offset of each network device can be accumulated separately.

[0092] Therefore, before determining the transmission power according to the power control process corresponding to the network device, the terminal device can determine to send the feedback information of the PDSCH from different network devices on different physical uplink control channels PUCCH.

[0093] In the embodiment of the present application, by associating the network device with the power control process, the power control process can accumulate the power offset from the same network device, so that the transmission power of the PUSCH can be consistent with the indication of the network device, thereby improving the reliability of the uplink transmission. Figure 4For example, assuming that PDCCH 0 and PDCCH 1 are information transmitted between the terminal device and the network device 1, and PDCCH 2 comes from the network device 2, the terminal device adds the power offset indicated by PDCCH 1 to the transmit power of PUSCH 0 when determining the transmit power of PUSCH 1, and can determine that the transmit power of PUSCH 1 is f(n)+3, while the network device 1 indicates the power offset based on PUSCH 0, that is, the transmit power of PUSCH 1 indicated by the network device 1 is f(n)+3. It can be seen that through the method provided in the embodiment of the present application, the transmit power of PUSCH is consistent with the indication of the network device.

[0094] Based on the same technical concept as the method embodiment, the present application embodiment provides a communication device. The structure of the communication device can be as follows Figure 6 As shown, it includes a processing unit 601 and a transceiver unit 602. The communication device can be specifically used to implement Figure 5 In the embodiment of the method executed by the terminal device, the device can be the terminal device itself, or it can be a chip or chipset in the terminal device or a part of the chip for executing the function of the relevant method. Among them, the transceiver unit 602 is used to receive the first PDCCH sent by the network device, and the first PDCCH carries the power offset corresponding to the PUSCH. The processing unit 601 is used to determine the transmission power according to the power control process corresponding to the network device, and the power control process is used to accumulate the power offset carried by the PDCCH from the network device, and determine the transmission power of the PUSCH according to the accumulation result. The transceiver unit 602 is also used to send PUSCH to the network device using the transmission power.

[0095] Exemplarily, the power control process has a corresponding relationship with the CORESET group corresponding to the first PDCCH.

[0096] In one implementation, the transceiver unit 602 can also be used to: receive a second PDCCH sent by the network device before the processing unit 601 determines the transmission power according to the power control process corresponding to the network device, the second PDCCH carries indication information of the power control process, and the indication information is used to indicate that there is a corresponding relationship between the power control process and the CORESET group corresponding to the second PDCCH, and the second PDCCH and the first PDCCH correspond to the same CORESET group.

[0097] Exemplarily, the indication information of the power control process may be SRI, and the value of SRI corresponds to the index of the power control process.

[0098] Exemplarily, the value of SRI corresponds to the power control parameter set used by the power control process.

[0099] The processing unit 601 may also be configured to: determine to send feedback information of PDSCH from different network devices on different physical uplink control channels PUCCH before determining the transmission power according to the power control process corresponding to the network device.

[0100] The division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. It is understood that the functions or implementations of each module in the embodiments of the present application may further refer to the relevant description of the method embodiment.

[0101] In one possible approach, the communication device may be as follows Figure 7 As shown, the communication device may be a terminal device or a chip in the terminal device. The device may include a processor 701, a communication interface 702, and optionally a memory 703, which may be arranged on the processor 701. The processing unit 601 may be the processor 701. The transceiver unit 602 may be the communication interface 702.

[0102] The processor 701 may be a central processing unit (CPU), or a digital processing module, etc. The communication interface 702 may be a transceiver, or an interface circuit such as a transceiver circuit, or a transceiver chip, etc. The device further includes: a memory 703 for storing programs executed by the processor 701. The memory 703 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random-access memory (RAM). The memory 703 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0103] The processor 701 is used to execute the program code stored in the memory 703, specifically to execute the actions of the processing unit 601, which will not be described in detail in this application. The communication interface 702 is specifically used to execute the actions of the transceiver unit 602, which will not be described in detail in this application.

[0104] The specific connection medium between the communication interface 702, the processor 701 and the memory 703 is not limited in the embodiment of the present application. Figure 7 In the embodiment, the memory 703, the processor 701 and the communication interface 702 are connected via a bus 704. Figure 7 The connections between the other components are shown in bold lines, which are only for illustration and are not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 7 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0105] An embodiment of the present invention further provides a computer-readable storage medium for storing computer software instructions required to be executed by the above-mentioned processor, which includes a program required to be executed by the above-mentioned processor.

[0106] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0107] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0108] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0109] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0110] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of protection of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A power control method, characterized in that: The method is applied to a terminal side, the terminal has the capability of supporting configuration of multiple control resource set CORESET group indexes, or the terminal is configured with multiple CORESET group indexes, or the terminal has the capability of supporting configuration of multiple CORESET group indexes and is configured with multiple CORESET group indexes, including: Receive a first physical downlink control channel PDCCH sent by a network device, where the first PDCCH carries a power offset corresponding to a physical uplink shared channel PUSCH; Determine the transmit power according to a power control process corresponding to the network device, the power control process being used to accumulate a power offset carried by a PDCCH from the network device, and determine the transmit power of the PUSCH according to the accumulation result; The PUSCH is transmitted to the network device using the transmission power.

2. The method according to claim 1, characterized in that The power control process has a corresponding relationship with the CORESET group corresponding to the first PDCCH.

3. The method according to claim 1, characterized in that Before determining the transmission power according to the power control process corresponding to the network device, the method further includes: A second PDCCH sent by the network device is received, where the second PDCCH carries indication information of the power control process, where the indication information is used to indicate that there is a corresponding relationship between the power control process and a CORESET group corresponding to the second PDCCH, and the second PDCCH and the first PDCCH correspond to the same CORESET group.

4. The method according to claim 3, characterized in that The indication information of the power control process is a sounding reference signal resource indication SRI, and the value of the SRI corresponds to the index of the power control process.

5. The method according to claim 4, characterized in that The value of the SRI corresponds to the power control parameter set used by the power control process.

6. The method according to any one of claims 1 to 5, characterized in that: Before determining the transmission power according to the power control process corresponding to the network device, the method further includes: It is determined to send feedback information of PDSCH from different network devices on different physical uplink control channels PUCCH.

7. A power control device, characterized in that: The device is applied to a terminal side, the terminal has the capability of supporting configuration of multiple control resource set CORESET group indexes, or the terminal is configured with multiple CORESET group indexes, or the terminal has the capability of supporting configuration of multiple CORESET group indexes and is configured with multiple CORESET group indexes, including: A transceiver unit, configured to receive a first physical downlink control channel PDCCH sent by a network device, wherein the first PDCCH carries a power offset corresponding to a physical uplink shared channel PUSCH; a processing unit, configured to determine a transmit power according to a power control process corresponding to the network device, wherein the power control process is configured to accumulate a power offset carried by a PDCCH from the network device, and determine the transmit power of the PUSCH according to the accumulated result; The transceiver unit is further configured to send the PUSCH to the network device using the transmit power.

8. The device according to claim 7, characterized in that The power control process has a corresponding relationship with the CORESET group corresponding to the first PDCCH.

9. The device according to claim 7, characterized in that The transceiver unit is further used for: Before the processing unit determines the transmission power according to the power control process corresponding to the network device, a second PDCCH sent by the network device is received, where the second PDCCH carries indication information of the power control process, where the indication information is used to indicate that there is a corresponding relationship between the power control process and the CORESET group corresponding to the second PDCCH, and the second PDCCH and the first PDCCH correspond to the same CORESET group.

10. The device according to claim 9, characterized in that The indication information of the power control process is a sounding reference signal resource indication SRI, and the value of the SRI corresponds to the index of the power control process.

11. The device according to claim 10, characterized in that The value of the SRI corresponds to the power control parameter set used by the power control process.

12. The device according to any one of claims 7 to 11, characterized in that: The processing unit is further used for: Before determining the transmission power according to the power control process corresponding to the network device, it is determined to send feedback information of PDSCH from different network devices on different physical uplink control channels PUCCH.

13. The device according to any one of claims 7 to 11, characterized in that: The processing unit is a processor, and the transceiver unit is a transceiver.

14. The device according to any one of claims 7 to 11, characterized in that: The device is a terminal equipment.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program or an instruction, and when the program or the instruction is read and executed by one or more processors, the method according to any one of claims 1 to 6 can be implemented.

16. A computer program product, characterized in that When the computer program product is executed on a terminal device, the terminal device executes the method according to any one of claims 1 to 6.

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