Power control method and related device

Abstract

The present application relates to the technical field of communication, and especially relates to a power control method and related equipment. The method comprises the following steps: determining a power control parameter, wherein the power control parameter comprises power spectral density information and frequency domain width information; determining a first reference power according to the power spectral density information and the frequency domain width information; and determining a first sending power according to the first reference power, wherein the first sending power is the power for sending uplink information. The embodiment of the present application can determine the threshold constraint of the uplink sending power according to the power spectral density information, so that the actual uplink sending power of the terminal equipment does not exceed the specification requirement of the power spectral density information.

Description

TECHNICAL FIELD

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

[0002] In a wireless communication system, power control is very important. For example, by controlling the uplink power of a terminal device, the quality of the uplink data sent by the terminal device can be guaranteed, and the interference to other terminal devices in the system can be reduced as much as possible, and the battery usage time of the terminal device can be prolonged, etc. However, the power control schemes currently proposed are mainly based on licensed frequency bands. With the expansion of wireless services, the licensed frequency bands have been difficult to meet the current service requirements, for example, 5G communication services have been expanded to unlicensed frequency bands. In the unlicensed frequency bands, there are more stringent requirements for power control. Under the premise that wireless services are expanded to unlicensed frequency bands, how to perform power control becomes a problem to be solved. SUMMARY

[0003] Therefore, the embodiments of the present application provide a power control method and related device, which can determine the threshold constraint of the uplink transmission power according to the power spectral density information, so that the actual uplink transmission power of the terminal device does not exceed the specification requirements of the power spectral density information.

[0004] In a first aspect, the embodiments of the present application provide a power control method, comprising: determining a power control parameter, the power control parameter comprising: power spectral density information and frequency domain width information; determining a first reference power according to the power spectral density information and the frequency domain width information; and determining a first transmission power according to the first reference power, the first transmission power being the power of transmitting uplink information.

[0005] Optionally, the power spectral density information comprises a limited power spectral density; the limited power spectral density is pre-configured according to a communication protocol; or the limited power spectral density is configured according to high-layer signaling from a network device.

[0006] Optionally, the frequency domain width information comprises one or more of the following information of the frequency domain resource occupied by the uplink transmission:

[0007] a number of resource blocks;

[0008] a resource block spacing;

[0009] a number of subcarriers;

[0010] a subcarrier spacing.

[0011] Optionally, determining the first reference power according to the power spectral density information and the frequency domain width information comprises: determining the first reference power according to the formula determining a first reference power; wherein X represents a limited power spectral density, X is a natural number, M RB,b,f,c represents a number of resource blocks occupied by the uplink channel, represents a number of subcarriers contained in a single resource block.

[0012] Optionally, the power control parameter further comprises: a first parameter group, and / or, a second parameter group; the first parameter group is used to determine a maximum transmission power of the terminal device at the uplink transmission occasion; the second parameter group is used to determine a second reference power, the second reference power is a power required for transmitting the uplink information.

[0013] According to the first reference power, determining a first transmission power, comprises: determining the first transmission power according to at least one of the maximum transmission power and the second reference power, and the first reference power.

[0014] Optionally, determining the first transmission power according to at least one of the maximum transmission power and the second reference power, and the first reference power, comprises: determining the minimum value of the maximum transmission power, the first reference power and the second reference power as the first transmission power.

[0015] Optionally, the power control parameter is a power control parameter of a physical uplink control channel (PUCCH), and the first transmission power is a transmission power of the PUCCH; or,

[0016] the power control parameter is a power control parameter of a physical uplink shared channel (PUSCH), and the first transmission power is a transmission power of the PUSCH; or,

[0017] the power control parameter is a power control parameter of an uplink sounding reference signal (SRS), and the first transmission power is a transmission power of the SRS.

[0018] In a second aspect, an embodiment of the present application provides a terminal device, comprising: a parameter obtaining module, configured to determine a power control parameter, the power control parameter comprising: power spectral density information and frequency domain width information; a processing module, configured to determine a first reference power according to the power spectral density information and the frequency domain width information; and determine a first transmission power according to the first reference power, the first transmission power being a power for transmitting uplink information.

[0019] In a third aspect, an embodiment of the present application provides a terminal device, comprising: at least one processor; and at least one memory connected with the processor in communication, wherein: the memory stores program instructions executable by the processor, and the processor invoking the program instructions can execute the method of the first aspect or any possible embodiment of the first aspect.

[0020] Fourthly, embodiments of the present invention provide a communication chip, comprising: a processor for executing computer program instructions stored in a memory, wherein when the computer program instructions are executed by the processor, the communication chip is triggered to execute the method as described in the first aspect or any possible embodiment of the first aspect.

[0021] Fifthly, embodiments of the present invention provide a computer-readable storage medium comprising a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform a method as described in the first aspect or any possible embodiment of the first aspect. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a communication system provided in an embodiment of the present invention;

[0024] Figure 2 This is a flowchart of a power control method provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of a terminal device provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of another terminal device provided in an embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Figure 1is a scenario schematic diagram of a communication system provided by an embodiment of the present application. The communication system 100 can be a wireless communication system, which can work in a licensed frequency band or an unlicensed frequency band. It can be understood that the use of the unlicensed frequency band can improve the system capacity of the wireless communication system, improve the channel access efficiency, improve the spectrum resource utilization, and ultimately improve the system performance.

[0029] As shown in Figure 1 , the communication system 100 can include at least one network device 101 and at least one terminal device 102, and the network device 101 and the terminal device 102, the terminal device 102 and the terminal device 102, and the network device 101 and the network device 101 are connected through wired or wireless communication technology. It should be noted that Figure 1 , the number and form of the terminal device 102 and the network device 101 do not constitute a limitation on the embodiments of the present application. In different embodiments, the network device 101 can also be connected to a core network device, which is not shown in Figure 1 .

[0030] It should be noted that the wireless communication system mentioned in the embodiments of the present application includes but is not limited to: a narrowband internet of things system (NB-IoT), a global system for mobile communications (GSM), an enhanced data rate GSM evolution system (EDGE), a wideband code division multiple access system (WCDMA), a code division multiple access 2000 system (CDMA2000), a time division-synchronous code division multiple access system (TDSCDMA), a long term evolution system (LTE), a fifth generation mobile communication system, a vehicle-mounted wireless short-range communication system, and a future mobile communication system.

[0031] In the embodiments of the present application, the network device 101 is a device deployed in a wireless access network to provide wireless communication functions for the terminal device 102. The network device 101 can include, but is not limited to, a base station (BS), a station (STA, including an access point (AP) and a non-AP station STA), a network controller, a transmission and reception point (TRP), a mobile switching center, or a wireless access point in wifi, etc. For example, the device that directly communicates with the terminal device 102 through a wireless channel is usually a base station. The base station can include various forms of macro base stations, micro base stations, relay stations, access points, or remote radio units (RRU), etc. Of course, the network device 101 that communicates wirelessly with the terminal device 102 can also be other network devices with wireless communication functions, which are not uniquely limited by the present application.

[0032] The terminal device 102 can include, for example, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc., which is a device that provides voice and / or data communication services to users, such as a handheld device with wireless connection functions, a vehicle-mounted device, a wearable device, a computing device, or other processing devices linked to a wireless modem. Currently, some examples of terminals are: a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Of course, the names of devices can be different in different systems, which are not listed one by one here.

[0033] In a wireless communication system, power control is very important. For example, in an unlicensed frequency band near 60GHz, the power spectral density (PSD) of a terminal device and a network device is limited. That is, if the frequency domain width of a signal is 1MHz, the maximum transmission power of the signal cannot exceed a certain set value XdBm. The power control method of the embodiments of the present application determines a first reference power based on the power spectral density, and uses the first reference power as one of the upper limits of the actual transmission power of the terminal device when determining the actual transmission power of the terminal device, so that the finally determined transmission power meets the requirement of the power spectral density.

[0034] Figure 2 is a power control method provided by the embodiments of the present application. The execution subject of the method can be a terminal device in the system shown in Figure 1 The processing steps of the method include:

[0035] 201, determining a power control parameter, the power control parameter including: power spectral density information and frequency domain width information. The power spectral density information can include a limited power spectral density. The limited power spectral density can be pre-configured according to a communication protocol. The terminal device can determine the value of the limited power spectral density according to the pre-configuration of the communication protocol. For example, the limited power spectral density can be a natural number, such as 13dBm. In some embodiments, the limited power spectral density can be configured according to high layer signaling from a network device. In some embodiments, the high layer signaling can be, for example, radio resource control (RRC) signaling, system information block (SIB) signaling, downlink control information (DCI), or the like.

[0036] The frequency domain width information is information used to indicate the frequency domain width of the uplink channel resource. In some embodiments, the frequency domain width information can include one or more of the resource block number, resource block interval, subcarrier number, and subcarrier interval. For example, the frequency domain width information includes the resource block number, and the number of subcarriers included in each resource block is a fixed value, such as 12. That is, the frequency domain width information only contains the resource block number. For another example, the frequency domain width information includes the resource block number and the resource block interval, and the number of subcarriers included in each resource block is a fixed value. That is, when the uplink channel frequency domain resource includes a plurality of physical resource blocks, the plurality of physical resource blocks can be distributed at intervals. Of course, in some embodiments, the number of subcarriers included in each resource block and the subcarrier interval can also be configured, and at this time, the frequency domain width information can also include the number of subcarriers included in each resource block and the subcarrier interval. Alternatively, the frequency domain width information can be configured according to high-layer signaling from the network device. Alternatively, the frequency domain width information can be carried in RRC signaling or SIB signaling or DCI signaling, etc.

[0037] 202, determine a first reference power according to the power spectral density information and the frequency domain width information. The first reference power is one of the upper limits of the actual transmission power determined according to the power spectral density information. Alternatively, the first reference power can be determined according to the formula determine the first reference power. Wherein, X represents the limited power spectral density. Alternatively, X is a natural number, which is predefined by the protocol; alternatively, X is a natural number, which is obtained by high-layer signaling configuration. RB,b,f,c represents the number of physical resource blocks (PRBs) occupied by the uplink channel. represents the number of subcarriers contained in a single PRB.

[0038] 203, determine a first transmission power according to the first reference power. The first transmission power is the power of the terminal device transmitting the uplink information. Alternatively, the first transmission power is less than or equal to the first reference power. That is, the actual uplink transmission power of the terminal device does not exceed the specification of the limited power spectral density.

[0039] In some embodiments, the power control parameter further includes: a first parameter group, and / or, a second parameter group. The first parameter group is used to determine the maximum transmission power of the terminal device at the uplink transmission occasion. The second parameter group is used to determine a second reference power, which is the power required by the terminal device to transmit the uplink information. Alternatively, the first parameter group can contain the maximum transmission power. In specific implementation, the maximum transmission power can be carried in high-layer signaling, which can be RRC signaling, SIB signaling, or DCI, for example.

[0040] The second parameter set can comprise parameters pre-configured according to a communication protocol and / or configured according to high layer signaling. Alternatively, the parameters in the second parameter set can be carried in at least one of the following signaling: RRC signaling, SIB signaling, DCI, TPC command, and other possible signaling. For example, the parameters in the second parameter set can be carried in one type of signaling or in multiple types of signaling respectively.

[0041] The terminal device can determine the first transmission power according to at least one of the maximum transmission power and the second reference power, and the first reference power.

[0042] Alternatively, the terminal device can determine the first transmission power according to the maximum transmission power and the first reference power. In a specific implementation, the terminal device can determine the minimum value of the maximum transmission power and the first reference power as the first transmission power.

[0043] Alternatively, the terminal device can determine the first transmission power according to the first reference power and the second reference power. In a specific implementation, the terminal device can determine the minimum value of the first reference power and the second reference power as the first transmission power.

[0044] Alternatively, the terminal device can determine the first transmission power according to the maximum transmission power, the first reference power, and the second reference power. In a specific implementation, the terminal device can determine the minimum value of the maximum transmission power, the first reference power, and the second reference power as the first transmission power. Alternatively, the terminal device can first determine the first minimum value of the maximum transmission power and the second reference power, and then determine the minimum value of the first minimum value and the first reference power as the first transmission power. Of course, the terminal device can first determine the second minimum value of the maximum transmission power and the first reference power, and then determine the minimum value of the second minimum value and the second reference power as the first transmission power.

[0045] In the embodiment of the present application, the terminal device determines the actual transmission power according to the maximum transmission power of the uplink transmission occasion, the power required by the terminal device to transmit the uplink information, and the maximum transmission power of the frequency domain width scheduled under the power spectral density limit, so that the determined transmission power meets the power spectral density limit.

[0046] In some embodiments, the power control parameter determined by the terminal device is a power control parameter of a Physical Uplink Shared Channel (PUSCH), and the first transmission power is a transmission power of the PUSCH. Specifically, if the terminal device transmits the PUSCH on an active uplink-carrier bandwidth part (UL-BWP) of a serving cell c using a parameter set with index j and a PUSCH power control adjustment state with index l, the actual transmission power of the terminal device at a PUSCH transmission occasion i (corresponding to the first transmission power) can be represented as P PUSCH,b,f,c (i,j,q d ,l), wherein:

[0047]

[0048] wherein P CMAX,f,c (i) is a maximum transmission power of the terminal device defined by the terminal device at the serving cell c and the PUSCH transmission occasion i.

[0049] is a first reference power determined according to the power spectral density information and the frequency domain width information, and specific meanings thereof are described in the description of step 202 and will not be repeated.

[0050]

[0051] is a power required by the terminal device for PUSCH transmission, i.e., corresponding to the second reference power described above.

[0052] wherein P 0_PUSCH,b,f,c (j) is a reception power expected by the network device. P 0_PUSCH,b,f,c (j) = P 0_NOMINAL_PUSCH,c (j) + P 0_UE_PUSCH,b,c (j), wherein P 0_NOMINAL_PUSCH,c (j) represents a transmission power of the PUSCH expected by the network device; P 0_UE_PUSCH,b,c (j) represents a power offset of the terminal device relative to P 0_NOMINAL_PUSCH,c (j). j ∈ {1, …, J-1}.

[0053] If the PUSCH transmission is scheduled by a RAR uplink grant, j = 0, P 0_UE_PUSCH,b,c (0) = 0, and P 0_NOMINAL_PUSCH,c (0) = P 0_PRE + Δ PREAMBLE_Nsg3 ; wherein P 0_PRE may be determined according to a parameter preambleReceivedTargetPower provided by high-layer signaling. Δ PREAMBLE _Msg3 msg3-DeltaPreamble provided by higher layer signaling. If the parameter msg3-DeltaPreamble is not provided in the serving cell c, then PREAMBLE_Msg3 = 0.

[0054] If the PUSCH transmission or PUSCH retransmission is configured by the higher layer parameter ConfiguredGrantConfig, then j = 1, P 0_NOMINAL_PUSCH,c (1) is provided by the higher layer parameter p0-NominalWithoutGrant. If the higher layer parameter p0-NominalWithoutGrant is not provided P 0_NOMINAL_PUSCH,c (1), then P 0_NOMINAL_PUSCH,c (1) = P 0_NOMINAL_PUSCH,c (0). P 0_UE_PUSCH,b,c (1) is determined according to the higher layer parameter p0 obtained from p0-PUSCH-Alpha. ConfiguredGrantConfig provides an index P0-PUSCH-AlphaSetId to a set of higher layer parameters P0-PUSCH-AlphaSet in the UL-BWP of the serving cell c.

[0055] If the PUSCH transmission or PUSCH retransmission is configured by DCI, then j = 2, P 0_NOMINAL_PUSCH,c (2) is provided by the higher layer parameter p0-NominalWithoutGrant. If the higher layer parameter p0-NominalWithoutGrant is not provided P 0_NOMINAL_PUSCH,c (2), then P 0_NOMINAL_PUSCH,c (2) = P 0_NOMINAL_PUSCH,c (0). P 0_UE_PUSCH,b,c (2) is provided by the first P0-PUSCH-AlphaSet value in the higher layer parameter p0-AlphaSets.

[0056] α b,f,c (j) represents the open loop path loss compensation coefficient of the terminal device. The network device determines the weight of the path loss in the uplink power control of the terminal device through α b,f,c (j).

[0057] When j = 0, α b,f,c (0) is determined according to the higher layer parameter msg3-Alpha. If the higher layer parameter msg3-Alpha is not provided, then α b,f,c (0) = 1.

[0058] When j = 1, α b,f,c(1) provided by alpha in p0-PUSCH-Alpha provided by high layer parameter ConfiguredGrantConfig. ConfiguredGrantConfig provides an index P0-PUSCH-AlphaSetId for a set of high layer parameters P0-PUSCH-AlphaSet of the active UL-BWP of the serving cell c.

[0059] When j = 2, a b,f,c (2) provided by the first P0-PUSCH-AlphaSet value in high layer parameter p0-AlphaSets.

[0060] PL b,f,c (q d ) represents the downlink path loss estimation in dB calculated by the terminal device according to the Cell Reference Signal (CRS) of the active UL-BWP of the serving cell c.

[0061] PL b,f,c (q d ) = referenceSignalPower - high layer filtered RSRP, where referenceSignalPower is provided by high layer signaling and high layer filtered RSRP is provided by parameter QuantityConfig.

[0062] Δ TF,b,f,c (i) represents the power offset of different Modulation and Coding Scheme (MCS) formats relative to the reference MCS format.

[0063] When K s = 1.25, When K s = 0, Δ TF,b,f,c (i) = 0. Where K s is provided by high layer parameter deltaMCS of the active UL-BWP of the serving cell c. BPRE of the active UL-BWP of the serving cell c and is calculated as follows:

[0064] When the PUSCH transmission includes UpLink-Shared Channel (UL-SCH) data, where C represents the number of transmitted code blocks r, K r represents the size of code block r, and N REIndicates the number of resource units. in It is the number of symbols used in the PUSCH transmission during the activation of the UL-BWP in serving cell c. It is the number of subcarriers on a PUSCH symbol j, excluding the demodulation reference signal (DMRS) subcarriers and the phase tracking reference signal (PTRS) subcarriers.

[0065] When PUSCH includes UL-SCH data

[0066] f b，f，c (i, l) represents the PUSCH power control adjustment state of the active UL-BWP of serving cell c during transmission time i.

[0067] δ PUSCH,b,c (i) is a correction value, also known as the TPC command. δ PUSCH,b,c (i) Included in DCI format 0_0 or DCI format 0_1 ​​of scheduling PUSCH transmission timing i on the active UL-BWP of serving cell c, or co-encoded with other TPC commands in DCI format 2_2, which has CRC parity check bits scrambled by TPC-PUSCH-RNTI.

[0068] This refers to the PUSCH power control adjustment state of PUSCH transmission scheduling i on the UL BWP activated in serving cell c, including cumulative and absolute types. If provided based on the higher-layer parameter tpc-Accumulation, accumulation is enabled.

[0069] It is on the UL-BWP activated in the serving cell c, before the PUSCH transmission time i-i0 K. PUSCH (i-i0)-1 symbols are transmitted to PUSCH before time i by K. PUSCH (i) There is a cardinality between the symbols The set of TPC command values ​​D i The sum of the TPC command values, where i0 > 0 satisfies the PUSCH transmission timing i-i0 before K. PUSCH (i-i0) symbols predate PUSCH transmission time i by K. PUSCH (i) The smallest integer of the symbol.

[0070] If the PUSCH transmission is scheduled by DCI format 0_0 or DCI format 0_1, KPUSCH (i) is the serving cell c activated UL BWP b The number of symbols between the last symbol of the PDCCH reception and the first symbol of the PUSCH transmission.

[0071] If the PUSCH transmission is configured based on the higher layer parameter ConfiguredGrantConfig, K PUSCH (i) is the serving cell c activated UL BWP b The number of symbols, K PUSCH,min is equal to the product of the number of symbols in each slot and the minimum value provided by k2 in PUSCH-ConfigCommon.

[0072] If the UE serves a PUSCH transmission on the cell c activated UL BWP b with maximum power on transmission occasion i-i0, and then f b,c (i) = f b,c (i-i0).

[0073] If the UE serves a PUSCH transmission on the cell c activated UL BWP b with minimum power on transmission occasion i-i0, and then f b,c (i) = f b,c (i-i0).

[0074] The UE resets the PUSCH power control accumulation on the serving cell c activated UL BWP b to f b,c (k) = 0, k = 0, 1,..., i.

[0075] When the higher layer provides one configuration of the related P O_UE_PUSCH,b,c (j) value, and when the higher layer provides one configuration of the related a b,c (j) value, f b,c (i) = d PUSCH,b,c (i) is the PUSCH power control adjustment state for the PUSCH transmission occasion i scheduled on the serving cell c activated UL BWP b if accumulation is not enabled based on the higher layer parameter tpc-Accumulation.

[0076] If the UE receives a random access response message for a PRACH transmission sent on the serving cell c activated UL BWP b , then f b,c (0) = d rampup,b,c P msg2,b,c + d msg2,b,c ​is the TPC command indicated in the random access response grant corresponding to the random access preamble sent on the activated UL-BWP of the serving cell c.

[0077]

[0078] ΔP rampuprequested,b,c is provided by higher layer and corresponds to the total power ramping up requested by higher layer from the first to the last random access preamble on the serving cell c, is the TPC command indicated in the random access response grant corresponding to the random access preamble sent on the activated UL-BWP of the serving cell c. b is the number of resource blocks allocated for the first PUSCH transmission on the activated UL-BWP of the serving cell c, Δ TF,b,c is the TPC command indicated in the random access response grant corresponding to the random access preamble sent on the activated UL-BWP of the serving cell c. b is the power adjustment for the first PUSCH transmission on the activated UL-BWP of the serving cell c.

[0079] In some embodiments, the power control parameter determined by the terminal device is a power control parameter of a Physical Uplink Control Channel (PUCCH), and the first transmission power is a transmission power of the PUCCH. Optionally, specifically, if the terminal device transmits the PUCCH on the activated UL-BWP of the serving cell c, the actual transmission power (corresponding to the first transmission power) of the terminal device at the PUCCH transmission occasion i can be represented as P PUCCH,b,f,c (i, q u , q d , l), wherein:

[0080]

[0081] P cMAX,f,c (i) is the maximum transmission power of the terminal device defined by the terminal device at the PUCCH transmission occasion i on the serving cell c.

[0082] is a first reference power determined according to the power spectral density information and the frequency domain width information, and specific meanings are described in the description of step 202 and will not be repeated.

[0083]

[0084] is the power required by the terminal device for the PUCCH transmission, that is, corresponds to the second reference power described above.

[0085] P 0_PUCCH,b,f,c (q u ) represents the expected reception power of the network device. P 0_PUCCH,b,f,c (q u ) = P 0_NOMINAL_PUCCH_c (q u ) + P0_UE_PUCCH_c (q u ), wherein P 0_NOMINAL_PUCCH_c (q u ) represents the PUCCH transmit power expected by the network device; P O_UE_PUCCH_c (q u ) represents the power offset of the terminal device relative to P 0_NOMINAL_PUCCH_c (q u ).

[0086] Δ F_PUCCH (F) is determined according to the relative relationship between the used PUCCH format and PUCCH format la.

[0087] Δ TF,b,f,c (i) is a PUCCH transmission power adjustment parameter.

[0088] g b,f,c (i, l) represents the adjustment value of the closed-loop power control of the terminal device, which is obtained according to the TPC command mapping in the PDCCH.

[0089] In some embodiments, the power control parameter determined by the terminal device is an uplink sounding reference signal (SRS) power control parameter, and the first transmission power is the transmission power of the SRS. Then the actual transmission power determined by the terminal device according to the maximum transmission power, the first reference power and the second reference power can be represented as P SRS,b,f,c (i, q s , l), wherein:

[0090]

[0091] P CMAX,f,c (i) is the maximum transmission power of the terminal device defined by the terminal device at the service cell c and the SRS transmission occasion i.

[0092] is the first reference power determined according to the power spectral density information and the frequency domain width information, the specific meaning of which is described in step 202 and will not be repeated.

[0093]

[0094] is the power required for the SRS transmission of the terminal device, that is, corresponding to the second reference power described above.

[0095] P 0_SRS,b,f,c (j) represents the expected receiving power of the network device.

[0096] α SRS,b,f,c (j) represents the open-loop loss compensation coefficient of the terminal device. The network device determines α SRS,b,f,c(j) determine the weight of the path loss in the terminal device uplink power control.

[0097] PL b,f,c (q d ) represents the downlink path loss estimation, in dB, calculated by the terminal device according to the reference signal (Reference Signal, RS) of the active DL-BWP of the serving cell c, such as SSB, CSI-RS.

[0098] PL b,f,c (q d ) = referenceSignalPower - higher layer filtered RSRP, where referenceSignalPower is provided by higher layer signaling, and higher layer filtered RSRP is provided by the parameter QuantityConfig.

[0099] h b,f,c (i, l) represents the adjustment value of the closed loop power control of the terminal device, which is obtained according to the TPC command mapping in the PDCCH.

[0100] Corresponding to the above power control method, the embodiment of the present application also provides a terminal device. Those skilled in the art can understand that these terminal devices can be composed by using commercially available hardware components and being configured through the steps taught by the present solution.

[0101] As shown in Figure 3 , the terminal device comprises a parameter acquisition module 301 and a processing module 302, wherein the parameter acquisition module 301 is configured to determine power control parameters, the power control parameters comprising power spectral density information and frequency domain width information; the processing module 302 is configured to determine a first reference power according to the power spectral density information and the frequency domain width information, and determine a first transmission power according to the first reference power, the first transmission power being the power of transmitting uplink information.

[0102] The terminal device of the embodiment of the present application can execute the power control method of the embodiment shown in Figure 2 . The parts not described in detail in the present embodiment can refer to the related description of the embodiment shown in Figure 2 . The execution process and technical effects of the technical solution can refer to the description in the embodiment shown in Figure 2 , which will not be described here.

[0103] It should be understood that Figure 3The division of each module of the terminal device shown is only a logical division of functions, and all or part of the actual implementation can be integrated into a physical entity, or can be physically separated. These modules can all be implemented in the form of software invoked by a processing element; all can be implemented in the form of hardware; or some modules can be implemented in the form of software invoked by a processing element, and some modules can be implemented in the form of hardware. For example, the processing module can be a separately established processing element, or can be implemented in a chip of an electronic device. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together or independently implemented. In the implementation process, each step of the above method or each of the above modules can be completed by integrated logic circuits of hardware in the processor element or instructions in the form of software.

[0104] For example, the above modules can be one or more integrated circuits configured to implement the above method, such as one or more application specific integrated circuits (ASICs), or one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs), etc. For another example, the modules can be integrated together to implement in the form of a system on a chip (SOC).

[0105] The embodiment of the present application also provides a communication chip, comprising: a processing module, configured to determine a first reference power according to power spectral density information and frequency domain width information included in a power control parameter; and determine a first sending power according to the first reference power, the first sending power being a power for sending uplink information. The processing module included in the communication chip of the embodiment can be all implemented in the form of software invoked by a processing element, or all can be implemented in the form of hardware; the function of the processing module can also be partially implemented in the form of software and partially implemented in the form of hardware. For specific implementation manners, refer to the implementation manners of the modules in Figure 3

[0106] Figure 4 A structural schematic diagram of a terminal device provided by the embodiment of the present application is shown in Figure 4 A simplified schematic diagram of a possible design structure of a terminal device involved in the above method embodiment is shown in the above. The terminal device comprises a transceiver 401, a processor 402, a memory 403 and a modem 404, which are connected through a bus.​

[0107] The transceiver 401 conditions (e.g., analog to digital conversion, filtering, amplification, frequency up-conversion, etc.) the output samples and generates an uplink signal, which is transmitted via an antenna to the network device in the above-described embodiments. In the downlink, the antenna receives a downlink signal from the network device in the above-described embodiments. The transceiver 401 conditions (e.g., filtering, amplification, frequency down-conversion, and digitization, etc.) the signal received from the antenna and provides the input samples. Illustratively, in the modem 404, the encoder 4041 receives traffic data and signaling messages to be transmitted on the uplink and processes (e.g., formats, codes, and interleaves) the traffic data and signaling messages. The modulator 4042 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides the above-described output samples. The demodulator 4043 processes (e.g., demodulates) the above-described input samples and provides symbol estimates. The decoder 4044 processes (e.g., deinterleaves and decodes) the symbol estimates and provides decoded data and signaling messages to the terminal device. The encoder 4041, the modulator 4042, the demodulator 4043, and the decoder 4044 can be implemented by a synthetic modem 404. These units process according to the radio access technology employed by the wireless access network (e.g., LTE, 5G, and other evolved systems). In Figure 4 In the illustrated embodiment, the transceiver 401 is integrated by the transmitter and the receiver, in other embodiments, the transmitter and the receiver can also be independent of each other.

[0108] The processor 402 controls and manages the terminal device, and is configured to perform the steps of the processing performed by the terminal device in the above-described method embodiments. For example, to control the terminal device to perform uplink power control and / or other processes of the techniques described in the present application. As an example, the processor 402 is configured to support the terminal device to perform Figure 2 and processing processes related to the terminal device. In different embodiments, the processor 402 can include one or more processors, for example, including one or more CPUs, the processor 402 can be integrated in a chip, or can be a chip itself.

[0109] The memory 403 is configured to store relevant instructions and data, and program codes and data of the terminal. In different embodiments, the memory 403 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a non-transitory computer readable storage medium, or a compact disc read-only memory (CD-ROM). In the embodiment, the memory 403 is independent of the processor 402. In other embodiments, the memory 403 can also be integrated into the processor 402.

[0110] It can be understood that, Figure 4 Only a simplified design of the terminal device is shown. In different embodiments, the terminal device can include any number of transmitters, receivers, processors, memories, etc., and all terminal devices that can implement the present application are within the protection scope of the present application.

[0111] Corresponding to the above-mentioned device embodiments, the embodiments of the present application also provide a communication system, which includes a network device and Figure 4 the terminal device shown.

[0112] In a specific implementation, the present application also provides a computer storage medium, wherein the computer storage medium can store a program, and the program can include some or all steps in the embodiments of the present application when executed. The storage medium can be a magnetic disc, an optical disc, a read-only memory (ROM) or a random access memory (RAM), etc.

[0113] In a specific implementation, the embodiments of the present application also provide a computer program product, which includes executable instructions, and when the executable instructions are executed on a computer, the computer executes some or all steps in the above-mentioned method embodiments.

[0114] In the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. The "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the cases of A alone, A and B together, and B alone. Wherein A and B can be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects. "At least one of the following" and the like means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b and c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0115] Those skilled in the art can appreciate that the units and algorithm steps described in the embodiments disclosed herein can be realized by electronic hardware, computer software and combination of electronic hardware and computer software. Whether the functions are realized in hardware or software mode depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0116] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0117] In several embodiments provided by the present application, any function realized in the form of a software function unit and sold or used as an independent product can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0118] The above only describes the preferred embodiments of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A power control method, characterized by, The method comprises: determining a power control parameter, the power control parameter comprising: power spectral density information and frequency domain width information; determining a first reference power according to the power spectral density information and the frequency domain width information; determining a first transmission power according to the first reference power, the first transmission power being a power for transmitting uplink information; the power control parameter further comprising: a first parameter group and / or a second parameter group; the first parameter group being used for determining a maximum transmission power of a terminal device at an uplink transmission occasion; the second parameter group being used for determining a second reference power, the second reference power being a power required for transmitting uplink information; determining the first transmission power according to the first reference power comprises: determining the first transmission power according to at least one of the maximum transmission power and the second reference power and the first reference power; determining the first reference power according to the power spectral density information and the frequency domain width information comprises: According to the formula determining a first reference power; wherein X represents a restricted power spectral density, X is a natural number, M RB,b,f,c denotes the number of resource blocks occupied by the uplink channel, b is a bandwidth index, f is a carrier index, c is a cell index, denotes the number of subcarriers contained in a single resource block, and μ is a parameter determined by the SCS used for transmitting the uplink information.

2. The method of claim 1, wherein, the power spectral density information comprising: a limited power spectral density; the limited power spectral density being pre-configured according to a communication protocol; or, the limited power spectral density being configured according to high-layer signaling from a network device.

3. The method of claim 1, wherein, the frequency domain width information comprising one or more of the following information of a frequency domain resource occupied by uplink transmission: a number of resource blocks; a resource block interval; a number of subcarriers; a subcarrier interval.

4. The method of claim 1, wherein, determining the first transmission power according to at least one of the maximum transmission power and the second reference power and the first reference power comprises: determining a minimum value of the maximum transmission power, the first reference power and the second reference power as the first transmission power.

5. The method of claim 1, wherein, the power control parameter being a power control parameter of a physical uplink control channel (PUCCH), the first transmission power being a transmission power of the PUCCH; or, the power control parameter being a power control parameter of a physical uplink shared channel (PUSCH), the first transmission power being a transmission power of the PUSCH; or, the power control parameter being a power control parameter of an uplink sounding reference signal (SRS), the first transmission power being a transmission power of the SRS.

6. A terminal device, characterized by comprising: The method comprises: a parameter obtaining module, configured to determine a power control parameter, the power control parameter comprising: power spectral density information and frequency domain width information; a processing module, configured to determine a first reference power according to the power spectral density information and the frequency domain width information; and determine a first transmission power according to the first reference power, the first transmission power being a power for transmitting uplink information; the power control parameter further comprising: a first parameter group and / or a second parameter group; the first parameter group being used for determining a maximum transmission power of a terminal device at an uplink transmission occasion; the second parameter group being used for determining a second reference power, the second reference power being a power required for transmitting uplink information; determining the first transmission power according to the first reference power comprises: determining the first transmission power according to at least one of the maximum transmission power and the second reference power and the first reference power; According to the power spectral density information and the frequency domain width information, a first reference power is determined, including: According to the formula determining a first reference power; wherein X represents a restricted power spectral density, X is a natural number, M RB,b,f,c denotes the number of resource blocks occupied by the uplink channel, b is a bandwidth index, f is a carrier index, c is a cell index, denotes the number of subcarriers contained in a single resource block, and μ is a parameter determined by the SCS used for transmitting the uplink information.

7. A terminal device, characterized by comprising: including: at least one processor; and at least one memory connected to the processor in communication, wherein: the memory has program instructions executable by the processor, and the processor calling the program instructions can execute the method of any one of claims 1 to 5.

8. A communication chip, comprising: including: a processing module for determining a first reference power according to power spectral density information and frequency domain width information included in a power control parameter; and, according to the first reference power, a first transmission power is determined, which is the power of transmitting uplink information; the power control parameter further includes: a first parameter set, and / or, a second parameter set; the first parameter set is used to determine the maximum transmission power of the terminal device at the uplink transmission occasion; the second parameter set is used to determine a second reference power, which is the power required for transmitting uplink information; determining the first transmission power according to the first reference power, including: determining the first transmission power according to at least one of the maximum transmission power and the second reference power, and the first reference power; determining the first reference power according to the power spectral density information and the frequency domain width information, including: According to the formula determining a first reference power; wherein X represents a restricted power spectral density, X is a natural number, M RB,b,f,c denotes the number of resource blocks occupied by the uplink channel, b is a bandwidth index, f is a carrier index, c is a cell index, denotes the number of subcarriers contained in a single resource block, and μ is a parameter determined by the SCS used for transmitting the uplink information.

9. A computer-readable storage medium, characterized in that, the computer readable storage medium includes stored programs, wherein the programs control the device where the computer readable storage medium is located to execute the method of any one of claims 1 to 5 when the programs are running.

Images