A communication method and apparatus

Abstract

A communication method and apparatus are disclosed, relating to the field of communication technology. The method includes: a terminal device determining path loss parameters based on at least two of a plurality of reference signals, wherein the terminal device is configured with the plurality of reference signals; the terminal device determining a first transmit power based on the path loss parameters; and the terminal device transmitting a first uplink transmission based on the first transmit power. Therefore, through this method, a network device configures multiple reference signals for the uplink transmission of the terminal device. The terminal device can coordinate with the plurality of path loss reference signals to measure and obtain a downlink path loss value. Furthermore, the terminal device can determine its first uplink transmission power based on the downlink path loss value. Thus, when multiple terminal devices exist at the edge of a cell managed by a network device, this scheme can reduce interference between the terminal devices and ensure the performance of the terminal devices.

Description

Technical Field

[0001] This application relates to the field of mobile communication technology, and in particular to a communication method and apparatus. Background Technology

[0002] 5G mobile communication (the 5G) th 5G (New Radio) systems support enhanced mobile broadband, low-latency reliable and massive MIMO communication services. Therefore, in order to meet the performance requirements of different terminal devices for throughput, latency and reliability, 5G NR systems need to support both high-frequency and low-frequency carriers, and the uplink needs to be implemented through a more flexible power control mechanism.

[0003] In existing uplink power control mechanisms, such as Figure 1 As shown, terminal device 1 and terminal device 2 communicate with the base station in a serving cell C managed by the base station. The base station sends uplink scheduling information of the physical uplink shared channel (PUSCH) to terminal device 1 or terminal device 2 through the physical downlink control channel (PDCCH). The PDCCH carries downlink control information (DCI). When the UE detects a corresponding PDCCH, it transmits the PUSCH to the base station using the corresponding transmission power on the allocated channel resources, based on the uplink scheduling information of the PUSCH contained therein, which includes PUSCH transmission power information.

[0004] However, in multi-point collaborative scenarios, where terminal device 1 is located at the edge of cell C and is served by two cells simultaneously, measuring based on a single cell to obtain the path loss value and determine the uplink transmission power will result in significant interference from terminal device 1 to other terminal devices, thus degrading system performance. Summary of the Invention

[0005] This application provides a communication method and apparatus for solving the problem of determining uplink transmission power in multi-point collaborative scenarios.

[0006] In a first aspect, a power control method is provided, which is executed by a terminal device or a communication device (e.g., a chip system) capable of supporting the terminal device in implementing the method. In this application, the method is described as being executed by a terminal device. The method includes: the terminal device determining path loss parameters based on at least two of a plurality of reference signals, wherein the terminal device is configured with the plurality of reference signals; the terminal device determining a first transmit power based on the path loss parameters; and the terminal device transmitting a first uplink transmission based on the first transmit power.

[0007] Through this design, the terminal device is configured with multiple reference signals. The terminal device determines at least two reference signals from the configured multiple path loss reference signals. Based on the at least two reference signals, the terminal device obtains path loss parameters. That is, by measuring the path transmission quality between the terminal device and the network device in a coordinated manner using different reference signals, the terminal device determines the uplink transmission transmit power. Furthermore, the terminal device determines the uplink transmission transmit power based on the path transmission quality. Therefore, when different terminal devices exist at the edge of the cell managed by the network device, using this method to determine the uplink transmission transmit power of the terminal device can reduce interference between different terminal devices and ensure the performance of the terminal device.

[0008] In one possible design, the terminal device determines path loss parameters based on at least two of a plurality of reference signals, including: the terminal device obtaining at least two first parameters based on the at least two reference signals, each of the at least two reference signals corresponding to one first parameter; the terminal device determining the path loss parameters based on the at least two first parameters; wherein the first parameter is one of the following: a downlink path loss estimate, a linear value of the downlink path loss estimate, a logarithmic value of the downlink path loss estimate, or a measurement of the higher-layer filtering.

[0009] Through this design, the terminal device coordinates the first parameter of each of the at least two reference signals to determine the path loss parameter, avoiding the inaccuracy caused by determining the path loss parameter by the first parameter of a single reference signal. Furthermore, this scheme flexibly sets multiple first parameter types, so the terminal device can use different first parameter types of different reference signals to flexibly determine the path loss parameter.

[0010] In one possible design, the terminal device determines the path loss parameter based on at least two of the plurality of reference signals, including: the terminal device obtaining a first parameter based on the at least two reference signals; and determining the path loss parameter based on the first parameter; wherein the first parameter is any one of the following: a downlink path loss estimate, a linear value of the downlink path loss estimate, a logarithmic value of the downlink path loss estimate, or a measurement of the higher-layer filter.

[0011] Through this design, the terminal device can coordinate with the at least two reference signals to obtain a first parameter; furthermore, the terminal device determines the path loss parameter based on the first parameter. Therefore, in this method, the first parameter is obtained based on the at least two reference signals, avoiding inaccuracies caused by obtaining the first parameter from a single reference signal. Moreover, this scheme flexibly sets multiple first parameter types, so the terminal device can use different first parameter types corresponding to different reference signals to flexibly determine the path loss parameter.

[0012] In one possible design, the method further includes: the terminal device determining at least two reference signals among the plurality of reference signals; wherein, the terminal device determining at least two reference signals among the plurality of reference signals includes: the terminal device acquiring first downlink control information (DCI), the first DCI being used to schedule the first uplink transmission; the terminal device determining at least two reference signals among the plurality of reference signals based on the first DCI.

[0013] With this design, the terminal device can quickly determine at least two of the plurality of reference signals by acquiring the first downlink control information, and then determine the path loss parameters based on the at least two reference signals.

[0014] In one possible design, the terminal device determines at least two reference signals among the plurality of reference signals based on the first DCI, including: the terminal device determines at least two reference signal index values ​​corresponding to the first field field value indicated by the first field in the first DCI based on the mapping relationship between the reference signal index and the first field value.

[0015] Through this design, the terminal device can accurately determine the index values ​​of at least two reference signals based on the mapping relationship between the reference signal index and the SRI field value, thereby determining at least two reference signals among the plurality of reference signals.

[0016] In one possible design, the path loss parameter satisfies the following formula:

[0017]

[0018] The at least two reference signals include a first reference signal and a second reference signal, where PL#1 represents the first downlink path loss estimate corresponding to the first reference signal, and PL#2 represents the second downlink path loss estimate corresponding to the second reference signal.

[0019] With this design, the terminal device obtains two downlink path loss estimates from two of the multiple reference signals, and then determines the path loss parameters based on these two downlink path loss estimates. This ensures the accuracy of the path loss parameters and avoids the inaccuracies caused by calculating the path loss parameters from the downlink path loss estimate of a single reference signal.

[0020] In one possible design, the path loss parameter satisfies the following formula:

[0021] PL b,f,c =10log10(delta1·PL#1+delta2·PL#2)

[0022] Wherein, the at least two reference signals include a first reference signal and a second reference signal, PL#1 represents the first downlink path loss estimate corresponding to the first reference signal, PL#2 represents the second downlink path loss estimate corresponding to the second reference signal, delta1 is a parameter configured by the network device for the terminal device or a constant greater than 0 and less than or equal to 1, and delta2 is a parameter configured by the network device for the terminal device or a constant greater than 0 and less than or equal to 1.

[0023] With this design, the terminal device obtains two downlink path loss estimates from two of the multiple reference signals, and then determines the path loss parameters based on these two downlink path loss estimates. This ensures the accuracy of the path loss parameters and avoids the inaccuracies caused by calculating the path loss parameters from the downlink path loss estimate of a single reference signal.

[0024] In one possible design, the first transmit power satisfies the following formula:

[0025]

[0026] Where b is the bandwidth BWP occupied by the Physical Shared Channel (PUSCH) transmission, f is the carrier occupied by the PUSCH transmission, c is the serving cell where the carrier is located, i is the transmission timing, j is the PUSCH scheduling method, and q is the PUSCH scheduling method. d It is the reference signal resource index, l is the power control adjustment status index, P CMAXfc (i) represents the maximum transmit power of the terminal device in cell c and carrier f, P O_PUSCH,b,f,c(j) represents the target power value of the PUSCH channel on cell c, carrier f, and BWP b. This indicates the number of RBs occupied by the PUSCH on the BWP with cell c and carrier f, at the time of PUSCH transmission i, where μ is the subcarrier spacing and PL is the number of RBs occupied by the PUSCH. b,f,c (q d ) represents the path loss on cell c, carrier f, and BWP b, α b,f,c (j) represents the path loss compensation factor for cell c, carrier f, and BWP b, Δ TF,b,f,c (i) represents compensation for different transmission formats, f b,f,c (i,l) represents the uplink active bandwidth of cell c and carrier f.

[0027] With this design, the terminal device calculates the first transmit power using the formula, and then uses the first transmit power to send the first uplink transmission.

[0028] Secondly, a communication method is provided, which is executed by a network device or a communication apparatus (e.g., a chip system) capable of supporting the network device in implementing the method. In this application, the method is described as being executed by a network device. The method includes:

[0029] In one possible design, the network device sends configuration information for multiple reference signals to the terminal device;

[0030] The network device sends a first indication information to the terminal device. The first indication information is used to indicate at least two of the plurality of reference signals, and the at least two reference signals are used to determine the transmission power of the first uplink transmission.

[0031] With this design, the network device sends an instruction message to the terminal device to instruct the terminal device to determine at least two of the plurality of reference signals.

[0032] In one possible design, the first indication information is the first field of the first downlink control information (DCI), which is used to instruct the terminal device to schedule a first uplink transmission; or the first indication information is carried by radio resource control (RRC) signaling.

[0033] In one possible design, the method further includes:

[0034] The network device determines at least two of the plurality of reference signals;

[0035] The network device determines the first field value of the first field corresponding to the at least two reference signals based on the mapping relationship between the reference signal index and the first field value.

[0036] With this design, the first indication information is the first field of the first downlink control information (DCI), which is sent to the terminal device via the first DCI and can also be carried via radio resource control (RRC) signaling. Thus, this method flexibly sets the content of the first indication information and sends it to the terminal device.

[0037] In one possible design, the method further includes:

[0038] The network device sends the mapping relationship between the reference signal index and the first field value to the terminal device.

[0039] One possible design also includes:

[0040] The network device sends information about multiple serving cells corresponding to the multiple reference signals to the terminal device, wherein the information about the multiple serving cells and the configuration information of the multiple reference signals are sent to the terminal device in the same RRC signaling.

[0041] Thirdly, this application provides a communication device that has the function of implementing the method described in the first aspect or any possible design of the first aspect. This function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described function.

[0042] Fourthly, this application also provides a computer storage medium storing a software program that, when read and executed by one or more processors, can implement the method provided in the first aspect or any of the designs therein.

[0043] Fifthly, embodiments of this application also provide a computer program product containing instructions that, when run on a computer, cause the computer to perform the method provided in the first aspect or any of the designs described above.

[0044] Sixthly, embodiments of this application provide a chip system including a processor for supporting a terminal device in implementing the functions involved in the first aspect above. In one possible design, the chip system further includes a memory for storing necessary program instructions and data for the terminal device. This chip system may be composed of chips or may include chips and other discrete devices. Attached Figure Description

[0045] Figure 1A schematic diagram of a communication system to which the power control mechanism of the prior art is applicable;

[0046] Figure 2A A schematic diagram of a mobile communication system provided in an embodiment of this application;

[0047] Figure 2B A schematic diagram of another mobile communication system provided in an embodiment of this application;

[0048] Figure 3 A schematic diagram illustrating a communication method flow provided in an embodiment of this application;

[0049] Figure 4 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0050] Figure 5 This is a schematic diagram of another communication device provided in an embodiment of this application;

[0051] Figure 6 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0052] Figure 7 This is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0053] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0054] The following explanations of some terms used in the embodiments of this application are provided to facilitate understanding by those skilled in the art.

[0055] 1) Terminal equipment, also known as user equipment (UE), is an entity on the user side used to receive or transmit signals, such as a mobile phone UE. Terminal equipment can also be called a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. Terminal equipment can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. Terminal equipment can be fixed or mobile. The embodiments of this application do not limit the specific technology or equipment form used in the terminal equipment.

[0056] In this application embodiment, the device for implementing the terminal's functions can be a terminal device; it can also be a device capable of supporting the terminal device in implementing the functions, such as a chip system, which can be installed in the terminal device. In this application embodiment, the chip system can be composed of chips, or it can include chips and other discrete devices. In the technical solutions provided in this application embodiment, the terminal device is used as an example to describe the technical solutions provided in this application embodiment.

[0057] 2) Network equipment, which can be access network equipment, also known as radio access network (RAN) equipment, is a device that provides wireless communication functions for terminal devices. Access network equipment includes, but is not limited to: next-generation node B (gNB), evolved node B (eNB), baseband unit (BBU), transmitting and receiving point (TRP), transmitting point (TP) in 5G, base stations in future mobile communication systems, or access points in WiFi systems. Access network equipment can also be radio controllers, central units (CU), and / or distributed units (DU) in cloud radio access network (CRAN) scenarios, or network equipment can be relay stations, vehicle-mounted equipment, and network equipment in future evolved public land mobile networks (PLMN).

[0058] The terminal device can communicate with multiple access network devices using different technologies. For example, the terminal device can communicate with access network devices supporting long-term evolution (LTE), access network devices supporting 5G, or simultaneously with both LTE-enabled and 5G-enabled access network devices. This application's embodiments are not limited to these specific examples.

[0059] In this application embodiment, the device for implementing the function of the network device can be a network device itself; it can also be a device capable of supporting the network device in implementing that function, such as a chip system, which can be installed in the network device. In the technical solutions provided in this application embodiment, the example of a network device being used to implement the function of the network device is used to describe the technical solutions provided in this application embodiment. The embodiments of this application do not limit the specific technology or specific device form adopted by the wireless access network device.

[0060] The technical solutions of this application can be applied to various communication systems, such as the Long Term Evolution (LTE) system, the New Radio (NR) system in the 5th generation (5G) mobile communication system, and future mobile communication systems.

[0061] 3) The path loss parameters involved in the embodiments of this application can be transmission loss values, that is, by calculating the power loss of data or signal transmission, the quality of the path used to transmit the data or signal is determined, and then the transmitting end can determine the transmission power it uses based on the quality of the path. The path loss parameters include various types, such as: path loss estimate, logarithmic value of path loss estimate, linear value of path loss estimate, and higher-layer filtering measurement values ​​that can reflect the path loss situation, etc. Among them, the path loss estimate, logarithmic value of path loss estimate, linear value of path loss estimate, and higher-layer filtering measurement values ​​can all be used as transmission loss values ​​of the path to determine the quality of the transmission path.

[0062] 4) The reference signal involved in the embodiments of this application can refer to a "pilot" signal, which is a known signal provided by the transmitting end to the receiving end for channel estimation or channel sounding, used for channel estimation, channel quality measurement, etc. Typically, the reference signal can include uplink reference signals and downlink reference signals. For example, the uplink reference signal refers to the signal sent by the terminal device to the base station, and the downlink reference signal refers to the signal sent by the base station to the terminal device. Uplink reference signals mainly include demodulation reference signals (DMRS) and sounding reference signals (SRS). Downlink reference signals mainly include channel state information (CSI) reference signals, multicast / broadcast single frequency network-reference signals (MBSFN-RS), UE-specific reference signals (RS), positioning reference signals (PRS), and channel state information-reference signals (CSI-RS).

[0063] 5) The downlink control information (DCI) involved in the embodiments of this application mainly refers to the control information related to uplink and downlink data transmission sent by the network device to the terminal device carried by the downlink control channel PDCCH, such as data transmission resource allocation information, uplink or downlink resource format information in the time slot, and control information of uplink and downlink data channels and signals.

[0064] 6) The Resource Indication Information (SRI) field involved in the embodiments of this application can refer to the terminal device determining the precoding and transmission level of its PUSCH channel based on the broadband SRI field in the DCI under non-codebook transmission, and selecting the transmission beam for PUSCH. That is, when the base station is configured with multiple SRS resources, scheduling PUSCH requires selecting one or more SRS resources to represent the transmission beam of PUSCH. Different SRI values ​​can correspond to different power control sets, which can enable different PUSCH transmission beams to use independent power control sets to increase transmission performance.

[0065] 7) The "multiple" mentioned in the embodiments of this application refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0066] In addition, it should be understood that in the description of this application, the words "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance or order.

[0067] Please refer to Figure 2A This is a schematic diagram of the architecture of a mobile communication system applicable to embodiments of this application. Figure 2A As shown, the mobile communication system includes a core network device 210A, a radio access network device 220A, and at least one terminal device (e.g., Figure 2A The terminal devices 231A and / or 232A are included. Both terminal devices 231A and 232A can be connected to the wireless access network device 220A wirelessly, and the wireless access network device 220A can be connected to the core network device 210A wirelessly or via a wired connection.

[0068] Or please refer to Figure 2B This is a schematic diagram of the architecture of another mobile communication system to which the embodiments of this application can be applied. Figure 2B As shown, the mobile communication system includes a core network device 210B and at least two radio access network devices (e.g., Figure 2B The device includes a wireless access network device 221B and a wireless access network device 222B, and at least one terminal device 230B. The terminal device 230B can be wirelessly connected to the wireless access network device 220A and the wireless access network device 220B, respectively. The wireless access network device 221B and the wireless access network device 222B can be wirelessly or wiredly connected to the core network device 210B, respectively.

[0069] in, Figure 2A and Figure 2B In a mobile communication system, the core network equipment and the radio access network equipment can be independent physical devices, or the functions of the core network equipment and the logical functions of the radio access network equipment can be integrated into the same physical device, or a single physical device can integrate some of the functions of the core network equipment and some of the functions of the radio access network equipment. The terminal equipment can be fixed in location or mobile. Additionally, the communication system may include other network equipment, such as wireless relay equipment and wireless backhaul equipment. The embodiments of this application do not limit the number of core network equipment, radio access network equipment, and terminal equipment included in the mobile communication system.

[0070] In the above Figure 2A In a mobile communication system, when terminal device 231A or terminal device 232A communicates with a radio access network device 220A (e.g., a base station), the radio access network device 220A sends uplink scheduling information of the Physical Downlink Shared Channel (PUSCH) to the terminal device 231A or terminal device 232A through the Physical Downlink Control Channel (PUSCH). Specifically, the PDCCH carries downlink control information (DCI), and the uplink scheduling information of the PUSCH is carried in the DCI format 0. Therefore, when the terminal device 231A or terminal device 232A detects a corresponding PDCCH, it sends the PUSCH to the radio access network device 220A using the corresponding transmit power on the allocated channel resources, based on the uplink scheduling information of the PUSCH contained therein.

[0071] Therefore, in order to determine the transmit power of the PUSCH transmitted by the terminal device 231A or the terminal device 232A, the prior art determines the transmit power based on the uplink power control mechanism measured by a single cell / transmission point.

[0072] The uplink power control mechanism for single-cell / transmission point measurement is described in detail below.

[0073] by Figure 2A Taking a mobile communication system as an example, the terminal device 231A performs measurements based on a wireless access network device 220A (e.g., a base station) to determine the transmit power of the terminal device 231A transmitting the PUSCH channel.

[0074] The terminal device 231A can determine the transmit power of the PUSCH channel according to the following formula:

[0075]

[0076] The following is a detailed explanation of the parameters in the formula that the transmit power of the PUSCH satisfies:

[0077] P PUSCH,b,f,c (i,j,q d ,l) represents the transmit power of the terminal device 231A transmitting the PUSCH channel on cell c, carrier f, and BWP b.

[0078] P CMAX,f,c (i) represents the maximum output power configured on carrier f of serving cell c during PUSCH channel transmission timing i. This maximum output power is related to factors such as the transmission capability of terminal device 231A and the frequency domain resource allocation of the PUSCH.

[0079] P O_PUSCH,b,f,c (q u ) represents the target power value of the PUSCH channel on serving cell c, carrier f, and BWP b, α b,f,c (j) represents the path loss compensation factor for cell with carrier c, carrier f, and BWP b. The P O_PUCCH,b,f,c (q u ) and the α b,f,c (j) can be uniformly represented as open-loop power parameters.

[0080] When the wireless access network device 220A (e.g., a base station) is configured with multiple indicators P O When considering the parameter set with α, the terminal device 231A will determine the parameter set number j used for the current PUSCH transmission based on the current transmission mode (including initial access transmission, data scheduling transmission based on downlink control information DCI, data scheduling transmission based on radio access control RRC, etc.) and the value indicated by the first field of the signal indication information, and further determine P... O And the value of α; where, the parameters in each parameter set include the identity document (ID) of that set, P O Value, α value.

[0081] Among them, the terminal device 231A determines the P O The set of parameters corresponding to the value of α includes the following two methods:

[0082] The first method: When the terminal device 231A is configured with multiple power parameter sets, and the downlink control information (DCI) for scheduling the PUSCH includes an SRI field, and the power parameter and SRI correspondence rule (SRI-PUSCH-PowerControl) is configured, the terminal device 231A can determine the parameter set used to actually send the PUSCH according to the mapping relationship between the SRI indication information and multiple parameter sets. The mapping relationship is also configured by Radio Resource Control (RRC).

[0083] It should be noted that the SRI stands for SRS Resource Indication Information, primarily used to select the transmission beam for the PUSCH. Specifically, when the wireless access device 220A (e.g., a base station) is configured with multiple SRS resources, one or more SRS resources need to be selected to represent the transmission beam of the PUSCH in order to schedule the PUSCH. Therefore, by indicating different values ​​of the SRI corresponding to different power control parameter sets, different PUSCH transmission beams can use independent power control parameter sets to improve transmission performance. The SRI field also indicates power parameters.

[0084] The SRI field indicates, for example, that the SRI is used to indicate the selected SRS resource number. A value in the SRI field corresponds to a set of power parameters. For instance, the 2-bit SRI field configured in a radio access network device 220A (e.g., a base station) has four code points: 00 / 01 / 10 / 11, each code point corresponding to a set of power parameters (P...). O , α).

[0085] The second method: When the terminal device 231A determines that multiple parameter sets have been configured, and the downlink control information (DCI) for scheduling the PUSCH does not include the SRI field, the default j=2. The terminal device 231A determines the parameter set corresponding to the first ID among the IDs of the multiple parameter sets, and then determines the PUSCH based on the parameter set corresponding to the first ID. O And the value of α.

[0086] This represents the number of resource blocks (RBs) occupied by PUSCH on the uplink active part bandwidth (Bandwidth part) b of carrier f in serving cell c.

[0087] μ is the value corresponding to the Subcarrier Size (SCS) configuration, as shown in Table 1 below:

[0088] Table 1

[0089] μ <![CDATA[Sub - carrier spacing Δf = 2 μ ·15 (kHz)]]> 0 15 1 30 2 60 3 120 4 240

[0090] PL b,f,c (q d ) represents the index value q of the reference signal passed by the terminal device 231A. d The calculated downlink path loss estimate is used as the path loss compensation value for uplink power control. The index value q of the reference signal is... d The specific methods for determining this include the following:

[0091] The first scenario: If the terminal device 231A is configured with multiple reference signal IDs, including a set of reference signal SSBs and / or a set of reference signal CSI-RS resources. Each reference signal ID value is mapped to an SSB index, and each SSB resource index is configured by the parameter ssb-Index; or, each reference signal ID value is mapped to a CSI-RS index, and each CSI-RS resource index is configured by the parameter csi-RS-Index. Within a set of reference signal indices, the terminal device 231A can determine a specific reference signal ID using either the SSB resource index or the CSI-RS resource index.

[0092] The second method: If the terminal device 231A is configured with a mapping relationship between SRI and PUSCH power parameters (SRI-PUSCH-Power Control) and is configured with multiple reference signal IDs, the terminal device 231A will obtain a value of the SRI field, determine the correspondence between the reference signal ID and the SRI field value based on the mapping relationship between the SRI field value and the PUSCH power parameter ID, and further, the terminal device 231A will determine the corresponding reference signal ID based on the correspondence between the reference signal ID and the SRI field value.

[0093] The third method: If the PUSCH transmission is scheduled by downlink control information DCI format 0_0, and the terminal device 231A obtains the spatial configuration information (PUSCH-SpatialRelationInfo) of the PUSCH resources, then the terminal device 231A will use the reference signal ID used for the PUSCH transmission in the PUSCH resource with the smallest index number among multiple PUSCH resources as the reference signal ID used for the PUSCH transmission.

[0094] The fourth type: If the PUSCH transmission is scheduled by DCI format 0_1, and the terminal device 231A has obtained the SRS default beam parameters (enableDefaultBeamPlForSRS), and the terminal device 231A has not been configured with a PUSCH path loss reference signal, the terminal device 231A will determine the path loss reference signal corresponding to the SRS resource set where the SRS resources related to the PUSCH transmission are located as the PUSCH reference signal.

[0095] Fifth: If the PUSCH transmission is scheduled by DCI format 0_0 and the terminal device 231A does not obtain the spatial configuration information (PUSCH-SpatialRelationInfo) of the PUSCH resources, or the PUSCH transmission is scheduled by downlink control information DCI format 0_1 ​​and the DCI does not contain the SRI field, or the terminal device 231A does not obtain the configuration information of the correspondence between SRI and PUSCH power parameters, the terminal device 231A determines that the ID of the reference signal is 0.

[0096] The sixth scenario: If the PUSCH transmission is scheduled by DCI format 0_0, and the terminal device 231A does not obtain the configuration information of the PUSCH resource of the active uplink BWP of the current serving cell, and the terminal device 231A obtains the enableDefaultBeamPlForPUSCH0 configuration information, then the terminal device 231A determines the QCL-TypeD in the Transmission Configuration Indication (TCI) state corresponding to the reference signal or the QCL assumption of the physical resource CORESET with the smallest index number in the active downlink BWP of the current serving cell.

[0097] For configuration authorization PUSCH

[0098] For example, when Type I configuration grant PUSCH, i.e., when RRC configuration downlink grant is configured, the terminal device 231A determines that the reference signal is configured by the path loss reference index parameter in the rrc-configureduplinkGrant.

[0099] For example 2: Type II configuration grant PUSCH, that is, when rrc-ConfiguredUplinkGrant is not configured, the terminal device 231A activates the PUSCH reference signal q mapped on the SRI field in the DCI. dThe reference signal is determined.

[0100] The seventh type: For DCI-scheduled PUSCH transmissions, or DCI-activated configuration-granted PUSCH transmissions, if the activated DCI does not contain an SRI field, the reference signal resource index q determined by the terminal device 231A... d =0.

[0101] Eighth method: If the terminal device 231A is not equipped with PUSCH-pathlossReferenceRS, or before the terminal device 231A is configured with dedicated parameters, the terminal device 231A uses SSB to calculate path loss, which is used to obtain the Master information block (MIB).

[0102] Ninth: If the PUSCH transmission is scheduled by RAR UL grant (random access response), the terminal device 231A uses the same reference signal index as the associated PRACH transmission to calculate the downlink path loss.

[0103] The formula for calculating the downlink road loss estimate can satisfy the following formula:

[0104] Pathloss=referenceSignalPower-higher layer filtered RSRP.

[0105] Wherein, referenceSignalPower represents the transmit power of the downlink reference signal configured by the higher layer signaling, and higher layer filtered RSRP0 represents the receive power of the reference signal received by the terminal device after being filtered by the higher layer.

[0106] If the terminal device 231A is not configured with a reception period CSI-RS, then the ReferenceSignalPower is configured through the synchronous broadcast signal block power ss-PBCH-BlockPower.

[0107] If the terminal device 231A is equipped with a reception period CSI-RS, referenceSignalPower is configured via ss-PBCH-BlockPower and powerControlOffsetSS (the offset between the transmission power of CSI-RS and SSB).

[0108] If the terminal device 231A is not configured with powerControlOffsetSS, the terminal device 231A determines that offset = 0.

[0109] Δ TF,b,f,c (i) represents compensation for different transmission formats. This information is determined based on factors such as the type of information carried by the PUSCH (e.g., carrying UL-SCH data information or CSI information), the location and quantity of physical resources occupied, and the modulation order.

[0110] f b,f,c (i,l) represents the PUSCH power control adjustment status at time i on the uplink active part bandwidth (Bandwidth part) b of carrier f in serving cell c. This information can be notified by downlink control information (DCI) signaling issued by radio access device 220A (e.g., base station). This allows radio access device 220A to adjust the PUSCH transmission power in real time according to the current channel state and scheduling. The specific mechanism is as follows: the DCI carries a transmission power control (TPC) field to indicate δ PUSCH,b,f,c The values ​​of (i,l) are (see Table 2 below), l∈{0,1}.

[0111] When the DCI is a DCI format specific to the terminal device 231A (only the terminal device 231A is configured to detect this DCI), the terminal device 231A determines the δ corresponding to the current PUSCH based on the mapping relationship between the SRI field indication value and l in the DCI. PUSCH,b,f,c (i,l).

[0112] When the DCI is a common DCI format (multiple terminal devices jointly detect the DCI), the DCI carries a 1-bit indicator l∈{0,1}. That is, the terminal device 231A only accumulates the TPC indicator with the same l value according to the value indicated by the SRI field.

[0113] When the DCI is in compact DCI format or the DCI does not have an SRI field, l = 0.

[0114] The terminal device 231A is based on the δ determined above. PUSCH,b,f,c (i,l) further determine f b,f,c (i,l):

[0115] In summary, in the prior art, the uplink power control mechanism based on single-cell / transmission point measurement determines the transmit power of the PUSCH sent by the terminal device 231A. In this method, the terminal device 231A can only measure by receiving a single reference signal from a wireless access device 210A (e.g., a base station) to determine the estimated transmission path loss between the terminal device 231A and the wireless access device 210A, and then determine the uplink transmit power of the terminal device 231A based on the estimated path loss. However, determining the uplink transmit power of each terminal device using this method is inaccurate. If the determined uplink transmit power is too high, the terminal device 231A will cause significant interference to other terminal devices (e.g., terminal device 232A); if the determined uplink transmit power is too low, it cannot be guaranteed that all wireless access network devices 220A (e.g., base stations) will receive the signal.

[0116] Therefore, this application provides a communication method that can be used to determine the uplink transmission power or to implement uplink transmission. In this method, a network device configures multiple path loss reference signals for a Physical Uplink Shared Channel (PUSCH). The terminal device can measure the downlink path loss value based on the multiple path loss reference signals, and then determine the uplink transmission power based on the downlink path loss value. The path loss reference signals can be configured by the same network device, or they can be configured by different network devices. Alternatively, the reference signal configuration information can be uniformly sent to one network device from different network devices, and then sent to the terminal device by that network device. Therefore, this method obtains channel transmission quality through collaborative measurement of different path loss reference signals and determines the uplink transmission power. Using this uplink transmission power for uplink transmission reduces interference between different terminal devices and ensures the performance of the network device in managing cell edge terminal devices.

[0117] In a communication method provided in this application embodiment, a maximum ratio combination (MRC) algorithm is also involved. The maximum ratio combination is the optimal choice among the prior art set-based combination techniques. Compared with selection combination and equal gain combination, the maximum ratio combination algorithm can achieve better performance. The performance improvement is determined by the higher signal-to-noise ratio brought about by array gain, which in turn brings better bit error rate characteristics.

[0118] The maximum ratio merging algorithm is described below.

[0119] For example, when there are multiple receiving antennas at the receiving end, receiver diversity is a form of spatial diversity.

[0120] Assume the received signal of the i-th receiving antenna is y i =h i x+n i , where y i h represents the symbol received on the i-th receiving antenna. i Let x represent the channel corresponding to the i-th receiving antenna, and n be the transmission symbol. i Let represent the noise corresponding to the i-th receiving antenna. It can be represented in matrix form as follows:

[0121] y = hx + n

[0122] Where y = [y1y2...y N ] T , represents the received symbols of all receiving antennas, h = [h1h2...h N ] T This represents the channels on all receiving antennas, n = [n1n2...n] N ] T This represents the noise corresponding to all receiving antennas.

[0123] The equivalent symbol is represented as:

[0124]

[0125] The sum of the channel energies of all receiving antennas satisfies the following formula:

[0126]

[0127] The signal-to-noise ratio (SNR) under maximum ratio combining includes the ratio of instantaneous bit energy to noise of a single antenna. The effective bit energy to noise ratio of all antennas is:

[0128] This application provides a flowchart of a communication method that can be used to determine uplink transmit power and to implement uplink transmission using the uplink transmit power. Therefore, embodiments of this application provide two schemes for specifically determining the uplink transmit power to achieve uplink transmission.

[0129] Please refer to Figure 3 This is a flowchart illustrating an implementation of a communication method provided in this application. The method can be executed by a terminal device or a communication device (e.g., a chip system) capable of supporting the implementation of the method by the terminal device. In this application, the method is described as being executed by a terminal device. This method can be applied to... Figure 2A-2B The communication system shown can, of course, be applied to other communication systems as well, and this application does not limit it in this regard. See also Figure 3 As shown, the method may include the following processing flow.

[0130] S301: The network device sends configuration information of multiple reference signals to the terminal device, and the terminal device receives the configuration information of the multiple reference signals.

[0131] In one implementation, the network device sends the plurality of reference signals to the terminal device. Optionally, the configuration information of the plurality of reference signals is sent to the terminal device in the same RRC signaling.

[0132] In one embodiment, the network device sends information about multiple serving cells corresponding to the multiple reference signals to the terminal device, wherein the information about the multiple serving cells and the configuration information of the multiple reference signals are sent to the terminal device in the same RRC signaling.

[0133] In this application, the configuration information of the plurality of reference signals may include time and frequency resources of the reference signals, as well as indication information and other relevant information for configuring the plurality of reference signals, and this application does not impose specific limitations on this.

[0134] S302: The network device sends first indication information to the terminal device, and the terminal device receives the first indication information. The first indication information is used to indicate at least two of the plurality of reference signals, and the at least two reference signals are used to determine the transmission power of the first uplink transmission.

[0135] Optionally, the first indication information is the first field of the first downlink control information (DCI), which is used to instruct the terminal device to schedule the first uplink transmission. Optionally, the first field is SRS resource indication information; or the first indication information is carried by radio resource control (RRC) signaling.

[0136] In this application, before the network device sends the first instruction information to the terminal device, it further includes:

[0137] The network device determines at least two of the plurality of reference signals;

[0138] The network device determines the first field value of the first field corresponding to the at least two reference signals based on the mapping relationship between the reference signal index and the first field value. The network device then sends the mapping relationship between the reference signal index and the first field value to the terminal device.

[0139] In one possible example, the network device determines at least two of the plurality of reference signals in any of the following ways:

[0140] Method 1: The network device determines the at least two reference signals based on the correspondence between the first field value and at least two power parameters.

[0141] Method 2: The network device obtains the indication information of the reference signal resource index sent by the terminal device, and determines the at least two reference signals based on the indication information of the reference signal resource index.

[0142] Method 3: The network device uses at least two reference signals configured in the path loss reference index in the uplink grant of the Radio Resource Control (RRC) configuration as the at least two reference signals.

[0143] Method 4: The network device uses at least two reference signals corresponding to the first field (e.g., the SRS field) in the activated downlink control information (DCI) as the at least two reference signals.

[0144] Method 5: The network device obtains the spatial configuration information corresponding to the uplink transmission of the terminal device, and uses at least two reference signals contained in the spatial configuration information as the at least two reference signals.

[0145] Method 6: The network device uses at least two reference signals from the configured multiple reference signal sets, in ascending order of index number, as the at least two reference signals.

[0146] Method 7: The network device determines the first resource set (e.g., SRS resource set) where the first resource (e.g., SRS resource) corresponding to the uplink transmission of the terminal device is located, and uses at least two reference signals associated with the first resource set as the at least two reference signals.

[0147] Method 8: The network device determines the at least two reference signals based on the transmission configuration indication status or by activating at least two resource sets in the downlink bandwidth with index numbers ranging from smallest to largest.

[0148] S303: The terminal device determines path loss parameters based on at least two of a plurality of reference signals, wherein the terminal device is configured with the plurality of reference signals.

[0149] In one embodiment, the terminal device further needs to determine at least two reference signals from the plurality of reference signals; the determination of at least two reference signals from the plurality of reference signals by the terminal device includes:

[0150] The terminal device acquires first downlink control information (DCI), which is used to schedule the first uplink transmission.

[0151] The terminal device determines at least two reference signals among the plurality of reference signals based on the first DCI.

[0152] Specifically, the terminal device determines at least two reference signals among the plurality of reference signals based on the first DCI, including:

[0153] The terminal device determines at least two reference signal index values ​​corresponding to the first field value indicated by the first field in the first DCI, based on the mapping relationship between the reference signal index and the first field value. Optionally, the first field is SRS resource indication information.

[0154] In one implementation, the terminal device determines the path loss parameters based on at least two of a plurality of reference signals, which may specifically include the following two methods:

[0155] In the first method, the terminal device determines the path loss parameter based on at least two of a plurality of reference signals, including: the terminal device obtaining at least two first parameters based on the at least two reference signals, each of the at least two reference signals corresponding to one first parameter; the terminal device determining the path loss parameter based on the at least two first parameters; wherein the first parameter is any one of the following: downlink path loss estimate, linear value of downlink path loss estimate, logarithmic value of downlink path loss estimate, and measurement value of higher layer filtering.

[0156] For example, the terminal device determines two of the multiple reference signals as a first reference signal and a second reference signal, and determines a first downlink path loss estimate and a second downlink path loss estimate based on the first reference signal and the second reference signal (both the first downlink path loss estimate and the second downlink path loss estimate belong to the aforementioned first parameter); the terminal device determines the path loss parameter based on the first downlink path loss estimate and the second downlink path loss estimate.

[0157] The path loss parameter satisfies the following formula:

[0158]

[0159] Wherein, PL#1 (which can also be represented as Pathloss#1) represents the first downlink path loss estimate corresponding to the first reference signal, and PL#2 (which can also be represented as Pathloss#2) represents the second downlink path loss estimate corresponding to the second reference signal. The values ​​of Path loss#1 and Path loss#2 can be determined by the following formula:

[0160] Path loss#1=referenceSignalPower#1-higher layer filtered RSRP#1 Formula 2

[0161] Path loss#2=referenceSignalPower#2-higher layer filtered RSRP#2 Formula 3

[0162] Wherein, referenceSignalPower#1 represents the transmit power of the first reference signal configured by the higher layer signaling, and higher layer filtered RSRP#1 represents the received power of the reference signal after the terminal device receives the first reference signal and it has been filtered by the higher layer. referenceSignalPower#2 represents the transmit power of the second path loss reference signal configured by the higher layer signaling, and higher layer filtered RSRP#2 represents the received power of the reference signal after the terminal device receives the second reference signal and it has been filtered by the higher layer.

[0163] In the second method, the terminal device determines the path loss parameter based on at least two of the plurality of reference signals, including: the terminal device obtaining a first parameter based on the at least two reference signals; and determining the path loss parameter based on the first parameter; wherein the first parameter is any one of the following: a downlink path loss estimate, a linear value of the downlink path loss estimate, a logarithmic value of the downlink path loss estimate, or a measurement of the higher-layer filtering.

[0164] For example, the terminal device determines a first downlink path loss estimate (the first downlink path loss estimate belongs to the aforementioned first parameter) based on two of the multiple reference signals, namely the first reference signal and the second reference signal; the terminal device determines the path loss parameter based on the first parameter.

[0165] The path loss parameter satisfies the following formula:

[0166] PL b,f,c =f(q) d1 ,q d2 )

[0167] Formula 4

[0168] Where, f(q) d1 ,q d2 ) represents the first downlink path loss estimate (i.e., the first parameter) determined by the first reference signal and the second reference signal, q d1q represents the index of the first reference signal. d2 This indicates the index of the second reference signal.

[0169] S304: The terminal device determines the first transmission power based on the path loss parameters.

[0170] S305: The terminal device sends a first uplink transmission according to the first transmit power.

[0171] The S304 step also includes the following:

[0172] In one implementation, based on the path loss parameters determined in S303, the terminal device determines a first transmit power according to the path loss parameters, wherein the first transmit power satisfies the following formula:

[0173] P PUSCH,b ,f, c (i,j,q d ,l)=

[0174]

[0175] Where b is the bandwidth BWP occupied by the Physical Shared Channel (PUSCH) transmission, f is the carrier occupied by the PUSCH transmission, c is the serving cell where the carrier is located, i is the transmission timing, j is the PUSCH scheduling method, and q is the PUSCH scheduling method. d It is the reference signal resource index, l is the power control adjustment status index, P PUSCH,b,f , c (i,j,q d ,l) represents the transmit power of the terminal device transmitting the PUSCH channel on cell c, carrier f, and BWP b. CMAXfc (i) represents the maximum transmit power of the terminal device in cell c and carrier f, P O_PUSCH,b,f,c (j) represents the target power value of the PUSCH channel on cell c, carrier f, and BWP b. This indicates the number of RBs occupied by the PUSCH on the BWP with cell c and carrier f, at the time of PUSCH transmission i, where μ is the subcarrier spacing and PL is the number of RBs occupied by the PUSCH. b,f,c (q d ) represents the path loss on cell c, carrier f, and BWP b, α b,f,c (j) represents the path loss compensation factor for cell c, carrier f, and BWP b, Δ TF,b,f,c (i) represents compensation for different transmission formats, f b,f,c (i,l) represents the uplink active bandwidth of cell c and carrier f.

[0176] Furthermore, in this application, the terminal device uses the first downlink path loss estimate of the first reference signal (when the multiple reference signals come from different serving cells, the first reference signal is assumed to be the reference signal of the primary serving cell) as the first uplink path loss compensation value. The terminal device uses the first uplink path loss compensation value, the target compensation factor and target power value configured in the network device, and the first transmit power P calculated by formula five in S304. PUCHb，f，c (i, j, q) d ,l), determine the first uplink transmission power P.

[0177] In one implementation, the first uplink transmission power is determined based on the maximum ratio combining principle.

[0178] Specifically, when the serving cell of the terminal device includes a primary serving cell and a cooperating serving cell, and the channel from the terminal device to the primary serving cell is h1, and the channel from the terminal device to the cooperating cell is h2, then the transmission power of the terminal device must satisfy the following formula:

[0179]

[0180] Only when the terminal equipment can it guarantee that the sum of the uplink transmission power received by the primary serving cell and the cooperating cells is equal to the power expected to be received during single-station transmission, that is, satisfying the following formula:

[0181]

[0182] in, Let P be a linear value, where P represents the UE's transmit power during single-cell transmission. Equations 6 and 7 can be derived from each other.

[0183] And because of E r =|h| 2 E t E r E represents the linear value of the signal energy received by the terminal device. t This represents the linear value of the signal energy transmitted by the network device. In the formula for calculating the downlink path loss estimate by the terminal device, Path loss = referenceSignalPower - higher layer filtered RSRP, where the path loss value, reference signal transmission power, and terminal device received power are logarithmic values. Therefore:

[0184]

[0185] According to Formula 8, we can obtain:

[0186]

[0187] Substitute the equation from formula nine into... Formula 10 is obtained:

[0188]

[0189]

[0190] Taking the logarithm of Formula 11, we obtain Formula 12:

[0191]

[0192] Among them, P COMP Here, P represents the uplink transmission power value, pathloss#1 represents the first downlink loss value corresponding to the first reference signal among the plurality of reference signals, pathloss#2 represents the second downlink loss value corresponding to the second reference signal among the plurality of reference signals, and P represents the first transmit power value. It should be noted that P is different from the first transmit power P calculated in S304. PUSCH,b,f,c (i,j,q d ,l) indicates the same.

[0193] This application provides a second solution, which can be executed by a terminal device and a network device, or by a chip in the terminal device and the network device. The method includes:

[0194] S401 performs the same function as S301 above, and S402 performs the same function as S302 above.

[0195] S403: The terminal device determines path loss parameters based on at least two of a plurality of reference signals, wherein the terminal device is configured with the plurality of reference signals.

[0196] In one implementation, the path loss parameter satisfies the following formula:

[0197] PL b,f,c =10log10(delta1·PL#1+delta2·PL#2) Formula Thirteen

[0198] Wherein, the at least two reference signals include a first reference signal and a second reference signal, PL#1 represents the first downlink path loss estimate corresponding to the first reference signal, PL#2 represents the second downlink path loss estimate corresponding to the second reference signal, delta1 is a parameter configured by the network device (e.g., base station) for the terminal device (user) or a constant greater than 0 and less than or equal to 1, and delta2 is a parameter configured by the network device (e.g., base station) for the terminal device or a constant greater than 0 and less than or equal to 1.

[0199] S404 performs the same function as S304 above.

[0200] In the second scheme, the path loss parameter is determined based on at least two of the multiple reference signals. That is, the value calculated by Formula 13 is used to calculate the uplink transmission power value through Formulas 5 to 13 in S304.

[0201] S405 performs the same function as S305 above.

[0202] This application provides a communication method that can be used to determine the uplink transmission power or to implement uplink transmission. In this method, a network device configures multiple path loss reference signals for a Physical Uplink Shared Channel (PUSCH). The terminal device can measure downlink path loss values ​​based on these multiple path loss reference signals, and then determine the uplink transmission power based on these downlink path loss values. The path loss reference signals can be configured by different network devices, or the reference signal configuration information can be uniformly sent to one network device from different network devices, which then sends it to the terminal device. Therefore, this method obtains path transmission quality through collaborative measurement of different path loss reference signals and determines the uplink transmission power. Using this uplink transmission power for uplink transmission reduces interference between different terminal devices and ensures the performance of the network device in managing cell edge terminal devices.

[0203] Based on the same inventive concept, embodiments of this application also provide a communication device, which can have the following functions: Figure 4 The device shown has a structure and possesses the behavioral functions of the terminal device described in the above method embodiments. For example... Figure 4 As shown, the device 400 may include a communication unit 401 and a processing unit 402. The details of each unit are described below.

[0204] Processing unit 401 is configured to determine path loss parameters based on at least two of a plurality of reference signals, wherein the terminal device is configured with the plurality of reference signals;

[0205] The processing unit 402 is further configured to determine the first transmission power based on the path loss parameters;

[0206] The communication unit 401 is used to send a first uplink transmission according to the first transmit power.

[0207] In one possible design, when the processing unit determines the path loss parameters based on at least two of a plurality of reference signals, it is specifically used for:

[0208] Based on the at least two reference signals, at least two first parameters are obtained through the communication unit, wherein each of the at least two reference signals corresponds to one first parameter;

[0209] The path loss parameter is determined based on the at least two first parameters;

[0210] The first parameter is one of the following: downlink path loss estimate, linear value of downlink path loss estimate, logarithmic value of downlink path loss estimate, or measured value of high-level filtering.

[0211] In one possible design, when the processing unit 402 determines the path loss parameters based on at least two of the plurality of reference signals, it is specifically used for:

[0212] The terminal device obtains a first parameter based on the at least two reference signals;

[0213] The path loss parameter is determined based on the first parameter;

[0214] The first parameter is one of the following: downlink path loss estimate, linear value of downlink path loss estimate, logarithmic value of downlink path loss estimate, or measured value of high-level filtering.

[0215] In one possible design, the processing unit 402 is further configured to: determine at least two of the plurality of reference signals;

[0216] Specifically, when determining at least two of the plurality of reference signals, the processing unit 402 is used to:

[0217] The first downlink control information (DCI) is obtained through the communication unit, and the first DCI is used to schedule the first uplink transmission.

[0218] Based on the first DCI, at least two of the plurality of reference signals are determined.

[0219] In one possible design, when the processing unit 402 determines at least two reference signals among the plurality of reference signals based on the first DCI, it is specifically used to:

[0220] Based on the mapping relationship between the reference signal index and the SRI field value, at least two reference signal index values ​​are determined that correspond to the first field field value indicated by the first field in the first DCI.

[0221] In one possible design, the path loss parameter satisfies the following formula:

[0222]

[0223] The at least two reference signals include a first reference signal and a second reference signal, where PL#1 represents the first downlink path loss estimate corresponding to the first reference signal, and PL#2 represents the second downlink path loss estimate corresponding to the second reference signal.

[0224] In one possible design, the path loss parameter satisfies the following formula:

[0225] PL b,f,c =10log10(delta1·PL#1+delta2·PL#2)

[0226] Wherein, the at least two reference signals include a first reference signal and a second reference signal, PL#1 represents the first downlink path loss estimate corresponding to the first reference signal, PL#2 represents the second downlink path loss estimate corresponding to the second reference signal, delta1 is a parameter configured by the network device for the terminal device or a constant greater than 0 and less than or equal to 1, and delta2 is a parameter configured by the network device for the terminal device or a constant greater than 0 and less than or equal to 1.

[0227] In one possible design, the first transmit power satisfies the following formula:

[0228]

[0229] Where b is the bandwidth BWP occupied by the Physical Shared Channel (PUSCH) transmission, f is the carrier occupied by the PUSCH transmission, c is the serving cell where the carrier is located, i is the transmission timing, j is the PUSCH scheduling method, and q is the PUSCH scheduling method. d It is the reference signal resource index, l is the power control adjustment status index, P PUSCH,b,f,c (i,j,q d ,l) represents the transmit power of the terminal device transmitting the PUSCH channel on cell c, carrier f, and BWP b. CMAX,f,c (i) represents the maximum transmit power of the terminal device in cell c and carrier f, P O_PUSCH,b,f,c (j) represents the target power value of the PUSCH channel on cell c, carrier f, and BWP b. This indicates the number of RBs occupied by the PUSCH on the BWP with cell c and carrier f, at the time of PUSCH transmission i, where μ is the subcarrier spacing and PL is the number of RBs occupied by the PUSCH. b,f,c (q d ) represents the path loss on cell c, carrier f, and BWP b, α b,f,c (j) represents the path loss compensation factor for cell c, carrier f, and BWP b, Δ TF,b,f,c (i) represents compensation for different transmission formats, f b,f,c (i,l) represents the uplink active bandwidth of cell c and carrier f.

[0230] Based on the same inventive concept, embodiments of this application also provide a communication device, which can have the following functions: Figure 5 The structure shown has the behavioral functions of the network device described in the above method embodiments. Figure 5 As shown, the device 500 may include a communication unit 501 and a processing unit 502. The details of each unit are described below.

[0231] The communication unit 501 is used to send configuration information of multiple reference signals to the terminal device; and to send first indication information to the terminal device, wherein the first indication information is used to indicate at least two of the multiple reference signals, and the at least two reference signals are used to determine the transmission power of the first uplink transmission.

[0232] In one possible design, the first indication information is the first field of the first downlink control information (DCI), which is used to instruct the terminal device to schedule a first uplink transmission; or the first indication information is carried by radio resource control (RRC) signaling.

[0233] In one possible design, the processing unit 502 is used to determine at least two of the plurality of reference signals; and to determine the first field value of the first field corresponding to the at least two reference signals according to the mapping relationship between the reference signal index and the SRI field value.

[0234] In one possible design, the mapping relationship between the reference signal index and the SRI field value is sent to the terminal device through the communication unit 502.

[0235] In one possible design, the communication unit 501 is further configured to: send information about multiple serving cells corresponding to the multiple reference signals to the terminal device, wherein the information about the multiple serving cells and the configuration information of the multiple reference signals are sent to the terminal device in the same RRC signaling.

[0236] Furthermore, embodiments of this application also provide a communication device, which may have the following features: Figure 6 The device structure shown can be a terminal device, or a chip or chip system capable of supporting the implementation of the above methods in the terminal device. For example... Figure 6 The illustrated device 600 may include at least one processor 602, which is coupled to a memory to read and execute instructions in the memory to implement the steps involved in the terminal device in the method provided in this application embodiment. Optionally, the device 600 may also include a transceiver 601 for supporting the device 600 in receiving or sending signaling or data. The transceiver 601 in the device 600 can be used to implement the functions of the transceiver unit 501 described above. For example, the transceiver 601 can be used by the device 600 to perform actions such as... Figure 3 In the communication method shown, steps S301 and S302, S305 or S401 and S402, S405, the processor 602 can be used to implement the functions of the processing unit 502 described above. For example, the processor 602 can be used by the device 600 to perform actions such as... Figure 3 The steps shown in S303-S304 or S403-S404 of the communication method are illustrated. Furthermore, the transceiver 601 can be coupled to the antenna 603 to support communication by the device 600. Optionally, the device 600 may further include a memory 604 storing computer programs and instructions. The memory 604 can be coupled to the processor 602 and / or the transceiver 601 to support the processor 602 in calling the computer programs and instructions in the memory 604 to implement the steps involved in the terminal device in the method provided in this application embodiment. Additionally, the memory 604 can also be used to store data involved in the method embodiments of this application, for example, to store data and instructions necessary for the transceiver 601 to perform interaction, and / or to store configuration information necessary for the device 600 to execute the method described in this application embodiment.

[0237] This application embodiment also provides a communication device, which may have the following features: Figure 7 The device structure shown can be a network device, or a chip or chip system capable of supporting terminal devices in implementing the above methods. For example... Figure 7 The illustrated device 700 may include at least one processor 702, which is coupled to a memory to read and execute instructions in the memory to implement the steps involved in the terminal device in the method provided in this application embodiment. Optionally, the device 700 may also include a transceiver 701 for supporting the device 700 in receiving or sending signaling or data. The transceiver 701 in the device 700 can be used to implement the functions of the communication unit 501 described above. For example, the transceiver 701 can be used by the device 700 to perform actions such as... Figure 3 In the communication method shown, steps S301 and S302, S305 or S401 and S402, S405, the processor 702 can be used to implement the functions of the processing unit 502 described above. For example, the processor 702 can be used by the device 700 to perform actions such as... Figure 3 The steps shown in S303-S304 or S403-S404 of the communication method are illustrated. Furthermore, the transceiver 701 can be coupled to the antenna 703 to support communication by the device 700. Optionally, the device 700 may further include a memory 704 storing computer programs and instructions. The memory 704 can be coupled to the processor 702 and / or the transceiver 701 to support the processor 702 in calling the computer programs and instructions in the memory 704 to implement the steps involved in the terminal device in the method provided in this application embodiment. Additionally, the memory 704 can also be used to store data involved in the method embodiments of this application, for example, to store data and instructions necessary for the transceiver 701 to perform interaction, and / or to store configuration information necessary for the device 700 to execute the method described in this application embodiment.

[0238] Based on the same concept as the above-described method embodiments, this application also provides a computer-readable storage medium storing some instructions. When these instructions are invoked and executed by a computer, the computer can perform the methods involved in any possible design of the above-described method embodiments. In this application, the computer-readable storage medium is not limited; for example, it can be RAM (random-access memory), ROM (read-only memory), etc.

[0239] Based on the same concept as the above method embodiments, this application also provides a computer program product that, when executed by a computer, can perform the methods involved in the method embodiments and any possible designs of the above method embodiments.

[0240] Based on the same concept as the above method embodiments, this application also provides a chip, which may include a processor and an interface circuit, for performing the methods involved in any possible implementation of the above method embodiments, wherein "coupling" means that two components are directly or indirectly combined with each other, and such combination may be fixed or movable, and such combination may allow fluid, electricity, electrical signals or other types of signals to communicate between the two components.

[0241] In summary, this application provides a communication method that can be used to determine the uplink transmission power or to implement uplink transmission. In this method, a network device configures multiple path loss reference signals for a Physical Uplink Shared Channel (PUSCH). The terminal device can measure the downlink path loss value based on the multiple path loss reference signals, and then determine the uplink transmission power based on the downlink path loss value. The path loss reference signals can be configured by different network devices, or the reference signal configuration information can be uniformly sent to one network device, which then sends it to the terminal device. Therefore, this method obtains path transmission quality through collaborative measurement of different path loss reference signals and determines the uplink transmission power. Using this uplink transmission power for uplink transmission reduces interference between different terminal devices and ensures the performance of the network device in managing cell edge terminal devices.

[0242] Through the above description of the embodiments, those skilled in the art will clearly understand that the embodiments of this application can be implemented in hardware, firmware, or a combination thereof. When implemented in software, the above functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium accessible to a computer. For example, but not limited to, computer-readable media can include RAM, ROM, electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage media, or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible to a computer. Furthermore, any connection can suitably be 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 coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the medium. As used in embodiments of this application, disks and discs include compact discs (CDs), laser discs, optical discs, digital video discs (DVDs), floppy disks, and Blu-ray discs, wherein disks typically magnetically copy data, while discs optically copy data using lasers. The combinations above should also be included within the scope of protection for computer-readable media.

[0243] In summary, the above descriptions are merely embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made based on the disclosure of this application should be included within the scope of protection of this application.

Claims

1. A communication method characterized by comprising: Comprising: A terminal device acquires a first downlink control information (DCI), the first DCI being used for scheduling a first uplink transmission; The terminal device determines at least two reference signal index values corresponding to a first field value indicated by a first field in the first DCI according to a mapping relationship between reference signal indexes and the first field value; The terminal device determines at least two reference signals from a plurality of reference signals according to the at least two reference signal index values; The terminal device is configured with the plurality of reference signals, the plurality of reference signals being from different cells; The terminal device determines a path loss parameter cooperatively according to the at least two reference signals, the terminal device being simultaneously served by cells of the at least two reference signals; the path loss parameter satisfying the following formula: Or, the path loss parameter satisfies the following formula: wherein, indicates that the cell is the carrier is and the path loss on the partial bandwidth BWP is The at least two reference signals include a first reference signal and a second reference signal, PL#1 indicates a first downlink path loss estimation value corresponding to the first reference signal, and PL#2 indicates a second downlink path loss estimation value corresponding to the second reference signal, Delta 1 is a parameter configured by the network device to the terminal device or a constant greater than 0 and less than or equal to 1, Delta 2 is a parameter configured by the network device to the terminal device or a constant greater than 0 and less than or equal to 1. The terminal device determines a first transmission power according to the path loss parameter; The terminal device transmits the first uplink transmission according to the first transmission power.

2. The method of claim 1, wherein, The terminal device determines a path loss parameter according to at least two reference signals in a plurality of reference signals, comprising: The terminal device obtains at least two first parameters according to the at least two reference signals, each of the at least two reference signals corresponding to one first parameter; The terminal device determines the path loss parameter according to the at least two first parameters; The first parameter is one of the following: a downlink path loss estimation value, a linear value of the downlink path loss estimation value, a logarithmic value of the downlink path loss estimation value, and a high-layer filtered measurement value.

3. The method of claim 1, wherein, The terminal device determines a path loss parameter according to at least two reference signals in a plurality of reference signals, comprising: The terminal device obtains one first parameter according to the at least two reference signals; The terminal device determines the path loss parameter according to the first parameter; The first parameter is one of the following: a downlink path loss estimation value, a linear value of the downlink path loss estimation value, a logarithmic value of the downlink path loss estimation value, and a high-layer filtered measurement value.

4. The method of claim 1, wherein, The first transmission power satisfies the following formula: wherein, is a partial bandwidth BWP occupied by a physical uplink shared channel, PUSCH, transmission, is a carrier occupied by the PUSCH transmission, is a serving cell where the carrier is located, is a transmission occasion, is a scheduling mode of the PUSCH, is a reference signal resource index, is a power control adjustment state index, denotes a transmission power of the PUSCH transmitted by the terminal device on a cell a carrier and the BWP , denotes a maximum transmission power of the terminal device on a cell a carrier , denotes a target power value of the PUSCH on a cell a carrier and the BWP , denotes the PUSCH transmission occasion on a cell a carrier and the BWP , a number of RBs occupied by the PUSCH on is a subcarrier spacing, denotes a path loss on a cell a carrier and the BWP , denotes a path loss compensation factor on a cell a carrier and the BWP , denotes a compensation for different transmission formats, denotes an uplink active partial bandwidth on a cell a carrier .

5. A communication method characterized by comprising: Comprising: A network device sends configuration information of a plurality of reference signals to a terminal device, the plurality of reference signals being from different cells; The network device sends a first downlink control information (DCI) to the terminal device, the first DCI being used for instructing the terminal device to schedule a first uplink transmission, the first DCI including a first field, a first field value of the first field being used for indicating at least two reference signals in the plurality of reference signals; the terminal device being simultaneously served by cells of the at least two reference signals, the at least two reference signals being used for cooperatively determining a path loss parameter, the path loss parameter being used for determining a transmission power of the first uplink transmission of the terminal device; the path loss parameter satisfying the following formula: Or, the path loss parameter satisfies the following formula: wherein, indicates that the cell is the carrier is and the path loss on the partial bandwidth BWP is the at least two reference signals include a first reference signal and a second reference signal, PL#1 indicates a first downlink path loss estimation value corresponding to the first reference signal, and PL#2 indicates a second downlink path loss estimation value corresponding to the second reference signal, Delta 1 is a parameter configured by the network device to the terminal device or a constant greater than 0 and less than or equal to 1, Delta 2 is a parameter configured by the network device to the terminal device or a constant greater than 0 and less than or equal to 1.

6. The method of claim 5, wherein, The method further comprises: The network device determines the at least two reference signals in the plurality of reference signals; The network device determines the first field value corresponding to the at least two reference signals according to a mapping relationship between a reference signal index and a first field value.

7. The method of claim 6, wherein, The method further includes: The network device sends the mapping relationship between the reference signal index and the first field value to the terminal device.

8. The method according to any one of claims 5 to 7, wherein, Further includes: The network device sends information of a plurality of serving cells corresponding to the plurality of reference signals to the terminal device, wherein the information of the plurality of serving cells and the configuration information of the plurality of reference signals are sent to the terminal device in a same RRC signaling.

9. A communications device, characterized by Includes: The communication unit is configured to obtain a first downlink control information (DCI), wherein the first DCI is used for scheduling a first uplink transmission; The processing unit is configured to determine at least two reference signal index values corresponding to a first field value indicated by a first field in the first DCI according to a mapping relationship between a reference signal index and a first field value, and determine at least two reference signals from a plurality of reference signals according to the at least two reference signal index values; The terminal device is configured with the plurality of reference signals, and the plurality of reference signals are from different cells; The processing unit is further configured to determine a path loss parameter cooperatively according to the at least two reference signals, wherein the terminal device is simultaneously served by cells of the at least two reference signals; and the path loss parameter satisfies the following formula: Alternatively, the path loss parameter satisfies the following formula: wherein, indicates that the cell is the carrier is and the path loss on the partial bandwidth BWP is The at least two reference signals include a first reference signal and a second reference signal, PL#1 represents a first downlink loss estimation value corresponding to the first reference signal, PL#2 represents a second downlink loss estimation value corresponding to the second reference signal, delta1 is a parameter configured by the network device to the terminal device or a constant greater than 0 and less than or equal to 1, and delta2 is a parameter configured by the network device to the terminal device or a constant greater than 0 and less than or equal to 1. The processing unit is further configured to determine a first transmission power according to the path loss parameter; The communication unit is configured to send the first uplink transmission according to the first transmission power.

10. The apparatus of claim 9, wherein, When the processing unit determines a path loss parameter according to at least two reference signals from a plurality of reference signals, the processing unit is specifically configured to: Obtain at least two first parameters through the communication unit according to the at least two reference signals, wherein each of the at least two reference signals corresponds to one first parameter; Determine the path loss parameter according to the at least two first parameters; The first parameter is one of the following: a downlink path loss estimation value, a linear value of the downlink path loss estimation value, a logarithmic value of the downlink path loss estimation value, and a high-layer filtered measurement value.

11. The apparatus of claim 9, wherein, When the processing unit determines a path loss parameter according to at least two reference signals from a plurality of reference signals, the processing unit is specifically configured to: The terminal device obtains one first parameter according to the at least two reference signals; Determine the path loss parameter according to the first parameter; The first parameter is one of the following: a downlink path loss estimation value, a linear value of the downlink path loss estimation value, a logarithmic value of the downlink path loss estimation value, and a high-layer filtered measurement value.

12. The apparatus of claim 9, wherein, The first transmission power satisfies the following formula: wherein, is a partial bandwidth BWP occupied by a physical uplink shared channel, PUSCH, transmission, is a carrier occupied by the PUSCH transmission, is a serving cell where the carrier is located, is a transmission occasion, is a scheduling mode of the PUSCH, is a reference signal resource index, is a power control adjustment state index, denotes a transmission power of the PUSCH transmitted by the terminal device on a cell a carrier and the BWP , denotes a maximum transmission power of the terminal device on a cell a carrier , denotes a target power value of the PUSCH on a cell a carrier and the BWP , denotes the PUSCH transmission occasion on a cell a carrier and the BWP of the cell a number of RBs occupied by the PUSCH, is a subcarrier spacing, denotes a path loss on a cell a carrier and the BWP , denotes a path loss compensation factor on a cell a carrier and the BWP , denotes a compensation for different transmission formats, denotes an uplink active partial bandwidth on a cell a carrier .

13. A communications device, characterized by Includes: The communication unit is configured to send configuration information of a plurality of reference signals to a terminal device, wherein the plurality of reference signals are from different cells; sending, to the terminal device, a first downlink control information (DCI), the first DCI being used to indicate that the terminal device schedules a first uplink transmission, the first DCI comprising a first field, a first field value of the first field being used to indicate at least two reference signals in the plurality of reference signals, the terminal device being simultaneously served by cells of the at least two reference signals, the at least two reference signals being used to cooperatively determine a path loss parameter, the path loss parameter being used to determine a transmit power of the first uplink transmission of the terminal device, the path loss parameter satisfying the following formula: or, the path loss parameter satisfying the following formula: wherein, indicates that the cell is the carrier is and the path loss on the partial bandwidth BWP is The at least two reference signals include a first reference signal and a second reference signal, PL#1 indicates a first downlink path loss estimation value corresponding to the first reference signal, PL#2 indicates a second downlink path loss estimation value corresponding to the second reference signal, delta1 is a parameter configured by the network device to the terminal device or a constant greater than 0 and less than or equal to 1, and delta2 is a parameter configured by the network device to the terminal device or a constant greater than 0 and less than or equal to 1.

14. The apparatus of claim 13, wherein, The apparatus further comprises: a processing unit configured to determine the at least two reference signals in the plurality of reference signals, and determine the first field value of the first field corresponding to the at least two reference signals according to a mapping relationship between a reference signal index and a first field value.

15. The apparatus of claim 14, wherein, The processing unit is further configured to: send, to the terminal device via the communication unit, the mapping relationship between the reference signal index and the first field value.

16. The apparatus of any one of claims 13-15, wherein, The communication unit is further configured to: send, to the terminal device, information of a plurality of serving cells corresponding to the plurality of reference signals, wherein the information of the plurality of serving cells and configuration information of the plurality of reference signals are sent to the terminal device in a same RRC signaling.

17. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, when the instructions are run on a computer, causing the computer to perform the method of any one of claims 1-8.

18. A computer program product, characterised in that, The computer program product, when invoked by a computer, causes the computer to perform the method of any one of claims 1-8.

Images