WO2022067819A1 - 一种通信方法及装置 - Google Patents
一种通信方法及装置 Download PDFInfo
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- WO2022067819A1 WO2022067819A1 PCT/CN2020/119752 CN2020119752W WO2022067819A1 WO 2022067819 A1 WO2022067819 A1 WO 2022067819A1 CN 2020119752 W CN2020119752 W CN 2020119752W WO 2022067819 A1 WO2022067819 A1 WO 2022067819A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
Definitions
- the present application relates to the field of mobile communication technologies, and in particular, to a communication method and device.
- the 5th generation (5G) new radio (NR) system supports mobile enhanced broadband, low-latency, reliability, and large-scale communication connection services. To meet the requirements of performance indicators such as throughput, delay and reliability, the 5G NR system needs to support high-frequency and low-frequency carriers, and the uplink needs to be implemented through a more flexible power control mechanism.
- terminal equipment 1 and terminal equipment 2 communicate with the base station in a serving cell C managed by a base station, and the base station communicates with the base station through a physical downlink control channel (physical downlink control channel).
- control channel, PDCCH sends the uplink scheduling information of the physical uplink shared channel (physical uplink shared channel, PUSCH) to the terminal device 1 or the terminal device 2.
- the PDCCH carries downlink control information (downlink control information, referred to as DCI for short); when the UE detects the corresponding PDCCH, according to the uplink scheduling information of the PUSCH contained therein, the scheduling information includes the power information of the PUSCH transmission , on the allocated channel resources, the PUSCH is transmitted to the base station by using the corresponding transmit power.
- DCI downlink control information
- the terminal device 1 is located at the edge of cell C, when it is served by two cells at the same time, measuring based on a single cell to obtain the uplink transmit power determined by the path loss value will cause the terminal device 1 to The interference to other terminal equipment is relatively large, thereby degrading the system performance.
- the present application provides a communication method and device, which are used to solve the problem of determining uplink transmit power in a multi-point coordinated scenario.
- a power control method is provided.
- the method is executed by a terminal device or a communication device (eg, a chip system) capable of supporting the terminal device to implement the method.
- the method is described as being executed by the terminal device.
- the method includes: a terminal device determines a path loss parameter according to at least two reference signals in a plurality of reference signals, wherein the terminal device is configured with the plurality of reference signals; and the terminal device determines a path loss parameter according to the path loss parameter , and determine the first transmit power; the terminal device sends the first uplink transmission according to the first transmit power.
- the terminal device is configured with multiple reference signals, the terminal device determines at least two reference signals among the configured multiple path loss reference signals, and the terminal device, according to the at least two reference signals,
- the path loss parameter is obtained, that is, the measurement is performed collaboratively through different reference signals to determine the path transmission quality between the terminal equipment and the network equipment. Further, the terminal equipment determines the transmit power of uplink transmission according to the path transmission quality. Therefore, when there are different terminal devices at the edge of the network device management cell, using this method to determine the transmit power of the uplink transmission of the terminal devices can reduce the interference between different terminal devices and ensure the use performance of the terminal devices.
- determining, by the terminal device, the path loss parameter according to at least two reference signals among the multiple reference signals includes: obtaining, by the terminal device, at least two first reference signals according to the at least two reference signals.
- a parameter, each of the at least two reference signals corresponds to a first parameter; the terminal device determines the path loss parameter according to the at least two first parameters; wherein the first parameter is one of the following: the estimated downstream path loss, the linear value of the estimated downstream path loss, the logarithmic value of the estimated downstream path loss, and the measured value of the upper layer filtering.
- the terminal device determines the path loss parameter in cooperation with the first parameter of each of the at least two reference signals, so as to avoid the path loss parameter caused by the first parameter of one reference signal determining the path loss parameter is inaccurate, and this solution 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.
- the terminal device determining the path loss parameter according to at least two reference signals in the plurality of reference signals includes: obtaining, by the terminal device, a first first reference signal according to the at least two reference signals. parameter; determine the path loss parameter according to the first parameter; the first parameter is any one of the following: a downlink path loss estimate value, a linear value of a downlink path loss estimate value, a pair of downlink path loss estimate values Numeric, a measure of high-level filtering.
- the terminal device can cooperate with the at least two reference signals to obtain a first parameter; further, the terminal device determines the path loss parameter according to the first parameter. Therefore, the method described in The first parameter is obtained according to the at least two reference signals, so as to avoid the inaccuracy caused by obtaining the first parameter by one reference signal, and this solution flexibly sets a variety of first parameter types. Therefore, the terminal The device may use different first parameter types corresponding to different reference signals to flexibly determine the path loss parameter.
- the method further includes: the terminal device determining at least two reference signals in the plurality of reference signals; wherein the terminal device determines at least two reference signals in the plurality of reference signals , including: the terminal device acquires first downlink control information DCI, where the first DCI is used to schedule the first uplink transmission; the terminal device determines, according to the first DCI, which of the multiple reference signals at least two reference signals.
- the terminal device can quickly determine at least two reference signals among the multiple reference signals by acquiring the first downlink control information, and then determine the path loss according to the at least two reference signals parameter.
- the terminal device determines at least two reference signals among the multiple reference signals according to the first DCI, including: the terminal device according to the mapping between the reference signal index and the first field value relationship, at least two reference signal index values corresponding to the first field domain value indicated by the first field in the first DCI are determined.
- the terminal device can accurately determine the index values of the at least two reference signals according to the mapping relationship between the reference signal index and the SRI field value, and then determine at least two reference signals in the plurality of reference signals. Signal.
- the path loss parameter satisfies the following formula:
- 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 value corresponding to the first reference signal
- PL#2 represents the second reference signal the corresponding estimated value of the second downlink path loss
- the terminal device obtains two estimated downlink path loss values respectively through two reference signals among the multiple reference signals, and then determines the path loss parameter according to the two estimated values of downlink path loss, thereby ensuring that all The accuracy of the path loss parameter described above can avoid the inaccuracy caused by calculating the path loss parameter from the estimated value of the downlink path loss of a reference signal.
- the path loss parameter satisfies the following formula:
- 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 value corresponding to the first reference signal
- PL#2 represents 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
- delta2 is a parameter configured by the network device to the terminal device or greater than A constant of 0 and less than or equal to 1.
- the terminal device obtains two estimated downlink path loss values respectively through two reference signals among the multiple reference signals, and then determines the path loss parameter according to the two estimated values of downlink path loss, thereby ensuring that all The accuracy of the path loss parameter described above can avoid the inaccuracy caused by calculating the path loss parameter from the estimated value of the downlink path loss of a reference signal.
- the first transmit power satisfies the following formula:
- b is the partial bandwidth BWP occupied by the PUSCH transmission on the physical shared channel
- 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 scheduling method of the PUSCH
- q d is the reference signal resource index
- l is the power control adjustment state index
- P CMAX,f,c (i) represents the maximum transmit power of the terminal device on the carrier f in cell c
- P O_PUSCH,b,f, c (j) indicates that the cell is c
- the carrier is f and the BWP is the target power value of the PUSCH channel on b
- the BWP of carrier f is the number of RBs occupied by the PUSCH on the PUSCH transmission opportunity i on b
- ⁇ is the subcarrier spacing
- PL b,f,c (q d ) indicates that the cell is c
- the terminal device obtains the first transmit power by calculating the formula, so as to send the first uplink transmission by using the first transmit power.
- a communication method is provided.
- the method is executed by a network device or a communication device (eg, a chip system) capable of supporting the network device to implement the method.
- the method is described as being executed by the network device.
- the method includes:
- the network device sends configuration information of multiple reference signals to the terminal device;
- the network device sends first indication information to the terminal device, where the first indication information is used to indicate at least two reference signals in the plurality of reference signals, and the at least two reference signals are used to determine the The transmit power of the first uplink transmission.
- the network device sends the first indication information to the terminal device to instruct the terminal device to determine at least two reference signals among the plurality of reference signals.
- the first indication information is the first field of the first downlink control information DCI, and the first DCI is used to instruct the terminal device to schedule the first uplink transmission;
- the first indication information is carried by radio resource control RRC signaling.
- the method further includes:
- the network device determines the at least two reference signals of the plurality of reference signals
- the network device determines the first field 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 first field field value.
- the first indication information is the first field of the first downlink control information DCI, which is sent to the terminal device through the first DCI, and can also be carried through the radio resource control RRC signaling. Therefore, the method flexibly sets the content of the first indication information and sends it to the terminal device.
- 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.
- the network device sends the information of the multiple serving cells corresponding to the multiple reference signals to the terminal device, wherein the information of the multiple serving cells and the configuration information of the multiple reference signals are in the same RRC signal. sent to the terminal device in the command.
- the present application provides a communication device having 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 executing corresponding software by hardware.
- the hardware or software includes one or more modules corresponding to the above functions.
- the embodiments of the present application further provide a computer storage medium, where a software program is stored in the storage medium, and the software program can implement the first aspect or any one of the software programs when read and executed by one or more processors method provided by a design.
- embodiments of the present application further provide a computer program product including instructions, which, when run on a computer, cause the computer to execute the method provided by the first aspect or any one of the designs.
- an embodiment of the present application provides a chip system, where the chip system includes a processor for supporting a terminal device to implement the functions involved in the first aspect above.
- the chip system further includes a memory for storing necessary program instructions and data of the terminal device.
- the chip system may be composed of chips, or may include chips and other discrete devices.
- FIG. 1 is a schematic diagram of a communication system to which a power control mechanism of the prior art is applicable;
- FIG. 2A is a schematic diagram of a mobile communication system according to an embodiment of the present application.
- FIG. 2B is a schematic diagram of another mobile communication system provided by an embodiment of the present application.
- FIG. 3 is a schematic diagram of a flow of a communication method provided by an embodiment of the present application.
- FIG. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application.
- FIG. 5 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
- FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application.
- FIG. 7 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
- a terminal device which may be referred to as a terminal for short, is also referred to as user equipment (user equipment, UE).
- a terminal device is an entity on the user side that is used to receive or transmit signals, such as a mobile phone UE.
- a terminal device may also be referred to as a terminal terminal, a user equipment (UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal, MT), and the like.
- the terminal device can be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, an augmented reality (Augmented Reality, AR) terminal device, industrial control (industrial control) wireless terminals in ), wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grid, wireless terminals in transportation safety Wireless terminals, wireless terminals in smart cities, wireless terminals in smart homes, and so on. Terminal devices can also be stationary or mobile.
- the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.
- the apparatus for implementing the function of the terminal may be a terminal device; it may also be an apparatus capable of supporting the terminal device to implement the function, such as a chip system, and the apparatus may be installed in the terminal device.
- the chip system may be composed of chips, or may include chips and other discrete devices.
- a network device can be an access network device, and an access network device can also be called a radio access network (RAN) device, which is a device that provides wireless communication functions for terminal devices.
- Access network equipment includes, but is not limited to, the next generation base station (generation nodeB, gNB), evolved node B (evolved node B, eNB), baseband unit (baseband unit, BBU) in 5G, transmitting and receiving points (transmitting and receiving), for example, but not limited to: point, TRP), transmitting point (transmitting point, TP), the base station in the future mobile communication system or the access point in the WiFi system, etc.
- the access network device may also be a wireless controller, a central unit (CU), and/or a distributed unit (DU) in a cloud radio access network (cloud radio access network, CRAN) scenario, or a network
- the device may be a relay station, a vehicle-mounted device, and a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN) network, and the like.
- PLMN Public Land Mobile Network
- a terminal device can communicate with multiple access network devices of different technologies. For example, a terminal device can communicate with an access network device that supports long term evolution (LTE), and can also communicate with an access network device that supports 5G. It can also communicate with LTE-enabled access network devices and 5G-enabled access network devices at the same time.
- LTE long term evolution
- 5G 5th Generationан ⁇
- the apparatus for implementing the function of the network device may be a network device; it may also be an apparatus capable of supporting the network device to implement the function, such as a chip system, and the apparatus may be installed in the network device.
- the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.
- the embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device.
- the technical solutions of the embodiments of the present application can be applied to various communication systems, for example, the new radio (NR) system in the fifth generation (5th generation, 5G) mobile communication system of the long term evolution (LTE) system and future mobile communication systems.
- NR new radio
- 5th generation, 5G fifth generation
- LTE long term evolution
- the path loss parameter involved in the embodiment of the present application may be a transmission loss value, 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 Quality determines the transmit power it uses.
- the path loss parameters include various types, such as: estimated path loss, logarithmic value of estimated path loss, linear value of estimated path loss, and measured value of high-level filtering that can reflect path loss conditions, etc.
- the path loss estimate value, the logarithm value of the path loss estimate value, the linear value of the path loss estimate value, and the measured value of the high-level filtering can all be used as the transmission loss value of the path to determine the quality of the transmission path.
- the reference signal involved in the embodiments of the present application may 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, and is used for channel estimation and channel quality measurement. measurement etc.
- the reference signal may include an uplink reference signal and a downlink reference signal.
- the uplink reference signal refers to the signal sent by the terminal device to the base station
- the downlink reference signal refers to the signal sent by the base station to the terminal device.
- the uplink reference signal mainly includes a demodulation reference signal (DMRS: Demodulation Reference Signal, DM-RS) and a channel sounding reference signal (Sounding Reference Signal, SRS), and the downlink reference signal mainly includes a channel state information (Channel State Information, CSI) reference signal , Multicast/Multicast Single Frequency Network Reference Signal (Multicast Broadcast Single Frequency Network-Reference Signal, MBSFN-RS), mobile station-specific reference signal UE-specific RS, Positioning Reference Signal (Positioning Reference Signal, PRS)), channel State Information-Reference Signal (Channel State Information-Reference Signal, CSI-RS).
- DMRS Demodulation Reference Signal
- SRS Sounding Reference Signal
- the downlink control channel (Downlink Control Information, DCI) involved in the embodiment of the present application is mainly the control information related to uplink and downlink data transmission carried by the downlink control channel PDCCH and sent by the network device to the terminal device, such as resources for data transmission. Allocation information, format information of uplink or downlink resources in the time slot, and control information of uplink and downlink data channels and signals, etc.
- the resource indication information SRI field involved in the embodiment of the present application may refer to the terminal equipment determining the precoding and transmission level of its PUSCH channel according to the wideband SRI field in the DCI under non-codebook-based transmission, and selecting a transmission beam for the PUSCH, That is, when the base station is configured with multiple SRS resources, scheduling PUSCH needs to select one or more SRS resources to represent the transmission beam of PUSCH, and different values can be indicated by SRI to correspond to different power control sets, and different PUSCH transmission can be enabled.
- the beam adopts an independent power control set to increase the transmission performance.
- FIG. 2A is a schematic structural diagram of a mobile communication system to which the embodiments of the present application can be applied.
- the mobile communication system includes a core network device 210A, a radio access network device 220A and at least one terminal device (eg, terminal device 231A and/or terminal device 232A in FIG. 2A ).
- Either the terminal device 231A or the terminal device 232A can be connected with the wireless access network device 220A in a wireless manner, and the wireless access network device 220A can be connected with the core network device 210A in a wireless or wired manner.
- FIG. 2B is a schematic structural diagram of another mobile communication system to which the embodiments of the present application can be applied.
- the mobile communication system includes a core network device 210B, at least two radio access network devices (for example, the radio access network device 221B and the radio access network device 222B in FIG. 2B ) and at least one terminal device 230B.
- the terminal device 230B can be connected to the wireless access network device 220A and the wireless access network device 220B respectively in a wireless manner, and the wireless access network device 221B and the wireless access network device 222B can be respectively wirelessly connected. Or connected to the core network device 210B in a wired manner.
- the core network equipment and the wireless access network equipment in the mobile communication systems shown in FIGS. 2A and 2B may be independent and different physical equipment, or may integrate the functions of the core network equipment with the logical functions of the wireless access network equipment. On the same physical device, it may also be a physical device that integrates the functions of part of the core network device and the function of part of the radio access network device. Terminal equipment can be fixed or movable.
- the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices. The embodiments of the present application do not limit the number of core network devices, wireless access network devices, and terminal devices included in the mobile communication system.
- the radio access network device 220A when the terminal device 231A or the terminal device 232A communicates with a radio access network device 220A (such as a base station), the radio access network device 220A sends the physical downlink control channel PUSCH to the physical downlink control channel PUSCH.
- the uplink scheduling information of the downlink shared channel PUSCH is sent to the terminal device 231A or the terminal device 232A.
- the PDCCH carries downlink control information DCI
- the uplink scheduling information of the PUSCH is carried in the DCI format 0.
- the terminal device 231A or the terminal device 232A detects the corresponding PDCCH, , the PUSCH is sent to the radio access network device 220A by using the corresponding transmit power on the allocated channel resources according to the uplink scheduling information of the PUSCH it contains.
- the transmit power is determined based on an uplink power control mechanism measured by a single cell/transmission point.
- the uplink power control mechanism of the single cell/transmission point measurement will be described in detail below.
- the terminal device 231A performs measurement based on one of the radio access network devices 220A (eg, base stations) to determine the transmit power of the PUSCH channel sent by the terminal device 231A.
- the radio access network devices 220A eg, base stations
- the terminal device 231A can determine the transmit power for sending the PUSCH channel according to the following formula:
- P PUSCH,b,f,c (i,j,q d ,l) represents the transmit power of the terminal device 231A to transmit the PUSCH channel when the cell is c, the carrier is f and the BWP is b.
- P CMAX,f,c (i) represents the maximum output power configured on the PUSCH channel transmission opportunity i on the carrier f of the serving cell c, and the maximum output power is related to the transmission capability of the terminal device 231A, the frequency domain of the PUSCH Resource allocation and other factors are related.
- P O_PUSCH,b,f,c (q u ) indicates that the serving cell is the c-carrier is f and the BWP is the target power value of the PUSCH channel on b
- ⁇ b,f,c (j) indicates that the cell is the carrier is the c-carrier is f and BWP is the path loss compensation factor on b.
- the P O_PUCCH,b,f,c ( qu ) and the ⁇ b,f,c (j) can be collectively expressed as open-loop power parameters.
- the terminal device 231A When the radio access network device 220A (such as a base station) is configured with multiple parameter sets indicating the values of PO and ⁇ , the terminal device 231A will perform the transmission according to the current transmission mode (including initial access transmission, downlink control information DCI-based Data scheduling and transmission, based on the data scheduling and transmission of radio access control (RRC, etc.) and the value indicated by the first field of the signal indication information, determine the parameter set number j used for the current PUSCH transmission, and further determine the value of PO and ⁇ ;
- the parameters in each parameter set include the identity document (ID) of the set, the PO value, and the ⁇ value.
- the terminal device 231A determines the parameter set corresponding to the PO and ⁇ values, specifically including the following two ways:
- the first type when the terminal device 231A is configured with multiple power parameter sets, and the downlink control information DCI scheduling the PUSCH includes the SRI field, and the power parameter and the SRI corresponding rule SRI-PUSCH-PowerControl are configured,
- the terminal device 231A may determine the parameter set actually used for sending the PUSCH according to the mapping relationship between the SRI indication information and multiple parameter sets, where the mapping relationship is also configured by the RRC.
- the SRI is SRS resource indication information, which is mainly used to select a transmission beam for transmitting the PUSCH.
- SRS resource indication information which is mainly used to select a transmission beam for transmitting the PUSCH.
- the SRI indicates that different values correspond to different power control parameter sets, so that different PUSCH transmission beams use independent power control parameter sets. to improve transmission performance.
- the SRI field is also used to indicate the power parameter.
- the SRI field indicates, exemplarily: the SRI is used to indicate the selected SRS resource number.
- the value of one SRI field corresponds to one power parameter set.
- the 2-bit SRI field configured by the radio access network device 220A eg, the base station
- the radio access network device 220A has four code bits of 00/01/10/11, and each code bit corresponds to a power parameter set (P O , ⁇ ).
- the parameter set corresponding to the first ID is determined from the ID of , so that the PO and the ⁇ value are determined according to the parameter set corresponding to the first ID.
- ⁇ is the value corresponding to the Subcarrier Size (SCS) configuration, as shown in Table 1 below:
- Subcarrier spacing ⁇ f 2 ⁇ ⁇ 15 (kHz) 0 15 1 30 2 60 3 120 4 240
- PL b,f,c (q d ) is represented as the estimated downlink path loss calculated by the terminal device 231A through the index value q d of the reference signal, and the estimated downlink path loss is used as the path loss compensation for uplink power control value.
- specific methods for determining the index value q d of the reference signal include the following:
- the first type 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.
- the value of each reference signal ID is mapped to an SSB index, and each SSB resource index is configured by the parameter ssb-Index; or, the value of each reference signal ID is mapped to a CSI-RS index, and each The CSI-RS resource index is configured by the parameter csi-RS-Index.
- the terminal device 231A may determine a certain reference signal ID through the SSB resource index or the CSI-RS resource index.
- the second type 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, and determine the corresponding relationship between the reference signal ID and the value of the SRI field according to the mapping relationship between the value of the SRI field and the power parameter ID of the PUSCH, and further, the terminal device 231A according to The corresponding relationship between the reference signal ID and the value of the SRI field determines the corresponding reference signal ID.
- the third type if the PUSCH transmission is scheduled by the downlink control information DCI format 0_0, and the terminal device 231A has acquired the spatial configuration information (PUSCH-SpatialRelationInfo) of the PUSCH resources, then the terminal device 231A is in multiple PUSCH resources , the reference signal ID used for PUSCH transmission in the PUSCH resource with the smallest index number is used as the reference signal ID used for the PUSCH transmission.
- the terminal device 231A is in multiple PUSCH resources , the reference signal ID used for PUSCH transmission in the PUSCH resource with the smallest index number is used as the reference signal ID used for the PUSCH transmission.
- the terminal device 231A determines the path loss reference signal corresponding to the SRS resource set where the SRS resource related to the PUSCH transmission is located as the PUSCH reference signal.
- the terminal device 231A determines that the ID of the reference signal is 0.
- the sixth type 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 current serving cell to activate the uplink BWP, and the terminal device 231A obtains the enableDefaultBeamP1ForPUSCH0 configuration information, then the The reference signal determined by the terminal device 231A corresponds to the QCL-TypeD in the Transmission Configuration Indication (TCI) state or the QCL assumption of the physical resource CORESET with the smallest index number in the active downlink BWP of the current serving cell.
- TCI Transmission Configuration Indication
- the Type I configuration grants PUSCH that is, when the RRC configuration downlink grant (rrc-Configured Uplink Grant) is configured, the terminal device 231A determines that the reference signal is determined by the pathloss reference index pathloss Reference in the rrc-ConfiguredUplinkGrant Index parameter configured
- Type II configuration grants PUSCH that is, when rrc-ConfiguredUplinkGrant is not configured, the terminal device 231A determines the reference signal according to the PUSCH reference signal q d mapped on the SRI field in the activated DCI.
- the eighth kind if the terminal device 231A is not configured with PUSCH-pathlossReferenceRS, or before the terminal device 231A configures the dedicated parameters, the terminal device 231A uses the SSB to calculate the path loss, and the SSB is used to obtain the master information block (Master information block). block, MIB)
- the ninth type if the PUSCH transmission is scheduled by the RAR UL grant (random access response, random access response), the terminal device 231A uses the same reference signal index as the relevant PRACH transmission to calculate the downlink path loss.
- the calculation formula of the estimated value of downlink path loss can satisfy the following formula:
- Pathloss referenceSignalPower-higher layer filtered RSRP.
- referenceSignalPower represents the transmit power of the downlink reference signal configured by the high-level signaling
- higher layer filtered RSRP0 represents the received power of the reference signal after the high-level filtering received by the terminal device.
- the ReferenceSignalPower is configured by the synchronous broadcast signal block power ss-PBCH-BlockPower.
- the referenceSignalPower is configured through ss-PBCH-BlockPower and powerControlOffsetSS (the offset between the transmission power of the CSI-RS and the SSB).
- ⁇ TF ,b,f,c (i) is expressed as compensation for different transmission formats. Quantity, modulation order and other factors are determined.
- f b, f, c (i, l) is the PUSCH power control adjustment state on the PUSCH transmission opportunity i on the uplink active part bandwidth (Bandwidth part) b of the carrier f of the serving cell c, and this information can be obtained by the wireless access device 220A (for example, a base station) sends downlink control information DCI signaling notification, so that the wireless access device 220A can adjust the PUSCH transmission power in real time according to the current transmission channel state and scheduling situation, wherein the specific mechanism is as follows: in the DCI The Transmission Power Control (TPC) field is carried to indicate the value of ⁇ PUSCH,b,f,c (i,l) (see Table 2 below), l ⁇ 0,1 ⁇ .
- TPC Transmission Power Control
- the terminal device 231A determines the current ⁇ PUSCH,b,f,c (i,l) corresponding to PUSCH.
- the DCI When the DCI is a common DCI format (multiple terminal devices jointly detect the DCI), the DCI carries 1 bit to indicate a value in l ⁇ 0,1 ⁇ ; that is, the terminal device 231A according to the SRI field The indicated value only accumulates TPC indications with the same value.
- the terminal device 231A further determines f b, f, c (i, l) according to the above determined ⁇ PUSCH, b, f, c (i, l):
- the transmit power of the terminal device 231A for sending the PUSCH is determined based on the uplink power control mechanism measured by a single cell/transmission point.
- the terminal device 231A can only perform measurement by receiving a single reference signal of one wireless access device 210A (eg, a base station) to determine the transmission path between the terminal device 231A and the wireless access device 210A loss estimation value, so as to determine the uplink transmit power of the terminal device 231A according to the path loss estimation value.
- a single reference signal of one wireless access device 210A eg, a base station
- the terminal device 231A will have a greater impact on the existence of other terminal devices (for example, the terminal device 232A). If the determined uplink transmit power is too small, it cannot be guaranteed that the radio access network device 220A (eg, the base station) can receive all the interference.
- the radio access network device 220A eg, the base station
- the embodiment of the present application provides a communication method, and the communication method can be used to determine the transmit power of the uplink transmission, or to realize the uplink transmission.
- the network device configures multiple path loss reference signals for a physical uplink shared channel PUSCH transmission, and the terminal device can measure the obtained downlink path loss value according to the multiple path loss reference signals, and then the terminal device The uplink transmission power is determined according to the downlink path loss value.
- the path loss reference signal may be configured by the same network device, or the path loss reference signal may be configured by different network devices, or the reference signal configuration information may be uniformly sent to one of the networks for different network devices device, which is sent by the network device to the terminal device.
- the method obtains channel transmission quality through coordinated measurement of different path loss reference signals, determines the transmit power of uplink transmission, and uses the transmit power of uplink transmission for uplink transmission, thereby reducing interference between different terminal devices and ensuring network
- the device manages the usage performance of cell edge terminal devices.
- a maximum ratio combining algorithm (Maximum ratio combining, MRC) is also involved.
- the maximum ratio combining is the optimal choice in the diversity combining technology in the prior art. Ratio selection merging and equal gain merging, the maximum ratio merging algorithm can obtain better performance, and the improvement in performance is the higher signal-to-noise ratio brought by Array Gain, which in turn brings better bit error rate characteristics decided.
- receiver diversity is a type of spatial diversity.
- y i h i x+n i , where y i represents the symbol received on the ith receiving antenna, hi represents the channel corresponding to the ith receiving antenna, and x is Transmission symbols, n i represents the noise corresponding to the i-th receiving antenna.
- the representation of signal-to-noise ratio under maximum ratio combining includes: the ratio of instantaneous bit energy to noise of a single antenna is The effective bit energy to noise ratio for all antennas is
- the present application provides a flowchart of a communication method, which can be used to determine uplink transmit power, and can also be used to implement uplink transmission using the uplink transmit power. Therefore, the embodiments of the present application provide two solutions for specifically determining the uplink transmit power to implement uplink transmission.
- FIG. 3 is an implementation flowchart of a communication method provided by an embodiment of the present application.
- the method can be executed by a terminal device or a communication device (eg, a chip system) capable of supporting the terminal device to implement the method.
- the execution of the method by the terminal device is taken as an example for description.
- the method can be applied to the communication systems shown in FIGS. 2A-2B , and of course can also be applied to other communication systems, which is not limited in this application.
- the method may include the following processing flow.
- the network device sends configuration information of multiple reference signals to a terminal device, and the terminal device receives the configuration information of the multiple reference signals.
- the network device sends the plurality of reference signals to the terminal device.
- the configuration information of the multiple reference signals is sent to the terminal device in the same RRC signaling.
- the network device sends information of multiple serving cells corresponding to the multiple reference signals to the terminal device, wherein the information of the multiple serving cells and the information of the multiple reference signals
- the configuration information is sent to the terminal equipment in the same RRC signaling.
- the configuration information of the multiple reference signals may include time-frequency resources of the reference signals, and indication information and other related information for configuring the multiple reference signals, etc., which is not specifically limited in this application. .
- 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 reference signals in the plurality of reference signals, and the at least two reference signals are used to determine the transmit power of the first uplink transmission.
- the first indication information is the first field of the first downlink control information DCI, and the first DCI is used to instruct the terminal device to schedule the first uplink transmission.
- the first field is SRS resource indication information; or the first indication information is carried by radio resource control RRC signaling.
- the method before the network device sends the first indication information to the terminal device, the method further includes:
- the network device determines the at least two reference signals of the plurality of reference signals
- the network device determines the first field 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 first field field value.
- the network device sends the mapping relationship between the reference signal index and the first field domain value to the terminal device.
- the network device determines the at least two reference signals in the plurality of reference signals, which may be determined in any one of the following manners:
- Manner 1 The network device determines the at least two reference signals based on the at least two power parameters according to the corresponding relationship between the first field value and the at least two power parameters.
- Manner 2 the network device acquires the indication information of the reference signal resource index sent by the terminal device, and determines the at least two reference signals according to the indication information of the reference signal resource index;
- Manner 3 The network device uses at least two reference signals configured by the path loss reference index in the RRC configuration uplink grant at the radio resource control layer as the at least two reference signals; or
- the network device uses at least two reference signals corresponding to the first field (for example, the SRS field) in the activated downlink control information DCI as the at least two reference signals; or
- the network device acquires the spatial configuration information corresponding to the uplink transmission of the terminal device, and uses at least two reference signals included in the spatial configuration information as the at least two reference signals; or
- the network device uses, as the at least two reference signals, at least two reference signals with index numbers from small to large in the configured multiple reference signal sets; or
- the network device determines a first resource set (such as an SRS resource set) where the first resource (such as an SRS resource) corresponding to the uplink transmission of the terminal device is located, and associates the first resource set with at least two reference signal as the at least two reference signals; or
- Manner 8 The network device determines the at least two reference signals according to the transmission configuration indication state or the activation of at least two resource sets in the downlink partial bandwidth with index numbers from small to large.
- the terminal device determines a path loss parameter according to at least two reference signals among the multiple reference signals, where the terminal device is configured with the multiple reference signals.
- the terminal device further needs to determine the at least two reference signals among the multiple reference signals; and the terminal device determines at least two reference signals among the multiple reference signals, including:
- the terminal device determines at least two reference signals among the plurality of reference signals according to the first DCI.
- the terminal device determines at least two reference signals among the multiple reference signals according to the first DCI, including:
- the terminal device determines at least two reference signal index values corresponding to the first domain value indicated by the first field in the first DCI according to the mapping relationship between the reference signal index and the first field value.
- the first field is SRS resource indication information.
- the terminal device determines the path loss parameter according to at least two reference signals among the multiple reference signals, which may specifically include the following two methods:
- the terminal device determines the path loss parameter according to at least two reference signals among the multiple reference signals, including: the terminal device obtains at least two first reference signals according to the at least two reference signals parameter, each of the at least two reference signals corresponds to a first parameter; the terminal device determines the path loss parameter according to the at least two first parameters; wherein the first parameter is Any of the following: downstream path loss estimate, linear value of downstream path loss estimate, logarithmic value of downstream path loss estimate, measured value of higher layer filtering.
- the terminal device determines that two reference signals among the multiple reference signals are a first reference signal and a second reference signal, and determines a first downlink path loss estimate according to the first reference signal and the second reference signal value and the second estimated downlink path loss value (both the first estimated value of the downlink path loss and the second estimated value of the downlink path loss belong to the above-mentioned first parameter); the terminal equipment estimates according to the first downlink path loss value and the estimated value of the second downlink path loss to determine the path loss parameter.
- the path loss parameter satisfies the following formula:
- PL#1 (also represented as Pathloss#1) represents the first downlink path loss estimate corresponding to the first reference signal
- PL#2 also represented as Pathloss#2
- Pathloss#1 represents the first downlink path loss estimate corresponding to the first reference signal
- Pathloss#2 represents the second reference signal the corresponding estimated value of the second downlink path loss.
- the values of Path loss#1 and Path loss#1 can be determined by the following formulas:
- Path loss#1 referenceSignalPower#1-higher layer filtered RSRP#1 Formula 2
- Path loss#2 referenceSignalPower#2-higher layer filtered RSRP#2 Formula 3
- referenceSignalPower#1 represents the transmit power of the first reference signal configured by the high-level signaling
- higher layer filtered RSRP#1 represents the received power of the reference signal after the terminal device receives the first reference signal and filtered by the high-level
- referenceSignalPower#2 represents the transmit power of the second path loss reference signal configured by the high-level signaling
- higher layer filtered RSRP#2 represents the received power of the reference signal after the terminal device receives the second reference signal and filtered by the high-level.
- the terminal device determining the path loss parameter according to at least two reference signals in the plurality of reference signals includes: obtaining, by the terminal device, a first reference signal according to the at least two reference signals. parameter; determine the path loss parameter according to the first parameter; the first parameter is any one of the following: a downlink path loss estimate value, a linear value of a downlink path loss estimate value, a pair of downlink path loss estimate values Numeric, a measure of high-level filtering.
- the terminal device determines a first downlink according to two reference signals among the multiple reference signals, that is, a first reference signal and a second reference signal, and according to the first reference signal and the second reference signal loss estimation value (the first downlink path loss estimation value belongs to the above-mentioned first parameter); the terminal device determines the path loss parameter according to the one first parameter.
- the path loss parameter satisfies the following formula:
- f(q d1 , q d2 ) represents the first downlink path loss estimation value (ie, the first parameter) determined by the first reference signal and the second reference signal
- q d1 represents the first The index of the reference signal
- q d2 represents the index of the second reference signal.
- S304 The terminal device determines the first transmit power according to the path loss parameter.
- S305 The terminal device sends the first uplink transmission according to the first transmit power.
- step S304 the specific content also includes the following:
- the terminal device determines the first transmit power according to the path loss parameter, where the first transmit power satisfies the following formula:
- b is the partial bandwidth BWP occupied by the PUSCH transmission on the physical shared channel
- 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 scheduling method of the PUSCH
- q d is the reference signal resource index
- l is the power control adjustment state index
- P PUSCH,b,f,c (i,j, qd ,l) indicates that the terminal equipment is in the cell c
- the carrier is f and the BWP is the transmit power of sending the PUSCH channel on b
- P CMAX,f,c (i) represents the maximum transmit power of the terminal equipment on the carrier f in cell c
- P O_PUSCH,b,f,c (j) Denotes that the cell is c, the carrier is f and the BWP is the target power value of the PUSCH channel on b, Indicates that the cell is c, and the BWP of carrier
- the carrier is f and the BWP are the path loss on b, ⁇ b,f,c (j) indicates that the cell is c, the carrier is f and the BWP is the path loss compensation factor on b, ⁇ TF,b,f,c (i) Indicates the compensation for different transmission formats, f b, f, c (i, l) indicates that the cell is c and the carrier is the uplink activated partial bandwidth of f.
- the terminal device uses the first reference signal (when the multiple reference signals are from different serving cells, the first reference signal is the reference signal of the main serving cell by default) as the first reference signal.
- the estimated downlink path loss is used as the first uplink path loss compensation value.
- the terminal device is based on the first uplink path loss compensation value, the target compensation factor and the target power value configured by the network device, and the first transmit power P PUSCH,b,f,c ( i,j,q d ,l), determine the first uplink transmission power P.
- the first uplink transmission power is determined based on the principle of maximum ratio combining.
- the terminal equipment when the serving cell of the terminal equipment includes the primary serving cell and the cooperative serving cell, the channel from the terminal equipment to the primary serving cell is h 1 , and the channel from the terminal equipment to the cooperative cell is h 2 . Therefore, the terminal equipment When the transmit power of the device satisfies the following formula,
- the terminal equipment can ensure that the sum of the uplink transmission power of the terminal equipment received by the primary serving cell and the cooperating cell is the power expected to be received when a single station transmits, that is, the following formula is satisfied:
- Equation 6 is a linear value of P, where P represents the transmit power of the UE during single-cell transmission. Equation 6 and Equation 7 can be derived from each other.
- P COMP represents the transmit power value of the uplink transmission
- pathloss#1 represents the first downlink loss value corresponding to the first reference signal among the multiple reference signals
- pathloss#2 represents the multiple reference signals
- P represents the first transmit power value. It should be noted that P is the same as the first transmit power P PUSCH,b,f,c (i,j,q d ,l) calculated in S304.
- a second solution is provided in the embodiments of the present application.
- the method can be executed by a terminal device and a network device, or can be executed by a chip in the terminal device and the network device, and the method includes:
- S401 executes the same content as the above S301, and S402 executes the same content as the above S302.
- the terminal device determines a path loss parameter according to at least two reference signals among the multiple reference signals, where the terminal device is configured with the multiple reference signals.
- the path loss parameter satisfies the following formula:
- 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 value corresponding to the first reference signal
- PL#2 represents the second reference signal
- delta1 is a parameter configured by a network device (such as a base station) to the terminal device (user) or a constant greater than 0 and less than or equal to 1
- delta2 is the network device (such as The parameter configured by the base station) to the terminal device may be a constant greater than 0 and less than or equal to 1.
- S404 executes the same content as the above-mentioned S304.
- the path loss parameter is determined according to at least two reference signals in the plurality of reference signals, that is, the value obtained by formula 13 is calculated by formula 5 to formula 13 in S304 to obtain the transmission of uplink transmission. power value.
- S405 performs the same content as the above-mentioned S305.
- the embodiment of the present application provides a communication method, and the communication method can be used to determine the transmit power of uplink transmission, or to realize uplink transmission.
- the network device configures multiple path loss reference signals for a physical uplink shared channel PUSCH transmission, and the terminal device can measure the obtained downlink path loss value according to the multiple path loss reference signals, and then the terminal device The uplink transmission power is determined according to the downlink path loss value.
- the path loss reference signal may be configured by different network devices, or the reference signal configuration information may be uniformly sent to one of the network devices for different network devices, and then sent to the terminal device by the network device.
- the above method obtains the transmission quality of the path through the coordinated measurement of different path loss reference signals, determines the transmission power of the uplink transmission, and uses the transmission power of the uplink transmission to perform the uplink transmission, thereby reducing the interference between different terminal equipment and ensuring that the network equipment manages the cell Use performance of edge terminal equipment.
- an embodiment of the present application further provides a communication device, which may have a structure as shown in FIG. 4 and have the behavior function of the terminal device in the above method embodiment.
- the apparatus 400 may include a communication unit 401 and a processing unit 402, and each unit will be described in detail below.
- a processing unit 401 configured to determine a path loss parameter according to at least two reference signals in a plurality of reference signals, wherein the terminal device is configured with the plurality of reference signals;
- the processing unit 402 is further configured to determine the first transmit power according to the path loss parameter
- the communication unit 401 is configured to send the first uplink transmission according to the first transmit power.
- the processing unit determines the path loss parameter according to at least two reference signals among the multiple reference signals, the processing unit is specifically configured to:
- 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, and a measured value of high-level filtering.
- the processing unit 402 when determining the path loss parameter according to at least two of the multiple reference signals, is specifically configured to:
- the first parameter is one of the following: a downlink path loss estimate value, a linear value of the downlink path loss estimate value, a logarithmic value of the downlink path loss estimate value, and a measured value of high layer filtering.
- the processing unit 402 is further configured to: determine at least two reference signals in the plurality of reference signals;
- processing unit 402 determines at least two reference signals in the plurality of reference signals, it is specifically configured to:
- At least two reference signals among the plurality of reference signals are determined.
- the processing unit 402 determines at least two reference signals among the plurality of reference signals according to the first DCI, the processing unit 402 is specifically configured to:
- At least two reference signal index values corresponding to the first field field value indicated by the first field in the first DCI are determined.
- the path loss parameter satisfies the following formula:
- 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 value corresponding to the first reference signal
- PL#2 represents the second reference signal the corresponding estimated value of the second downlink path loss
- the path loss parameter satisfies the following formula:
- 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 value corresponding to the first reference signal
- PL#2 represents 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
- delta2 is a parameter configured by the network device to the terminal device or is a constant greater than 0 and less than or equal to 1.
- the first transmit power satisfies the following formula:
- b is the partial bandwidth BWP occupied by the PUSCH transmission on the physical shared channel
- 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 scheduling method of the PUSCH
- q d is the reference signal resource index
- l is the power control adjustment state index
- P PUSCH,b,f,c (i,j, qd ,l) indicates that the terminal equipment is in the cell c
- the carrier is f and the BWP is the transmit power of sending the PUSCH channel on b
- P CMAX,f,c (i) represents the maximum transmit power of the terminal equipment on the carrier f in cell c
- P O_PUSCH,b,f,c (j) Denotes that the cell is c, the carrier is f and the BWP is the target power value of the PUSCH channel on b, Indicates that the cell is c, and the BWP of carrier
- an embodiment of the present application further provides a communication device, which may have a structure as shown in FIG. 5 and have the behavior function of the network device in the above method embodiment.
- the apparatus 500 may include a communication unit 501 and a processing unit 502, and each unit will be described in detail below.
- a communication unit 501 configured to send configuration information of multiple reference signals to a terminal device; send first indication information to the terminal device, where the first indication information is used to indicate at least two reference signals in the multiple reference signals signal, the at least two reference signals are used to determine the transmit power of the first uplink transmission.
- the first indication information is the first field of the first downlink control information DCI, and the first DCI is used to instruct the terminal device to schedule the first uplink transmission;
- the first indication information is carried by radio resource control RRC signaling.
- the processing unit 502 is configured to determine the at least two reference signals in the plurality of reference signals; The first field field value of the first field corresponding to the signal.
- the mapping relationship between the reference signal index and the SRI field value is sent to the terminal device through the communication unit 502 .
- the communication unit 501 is further configured to: send information of multiple serving cells corresponding to the multiple reference signals to the terminal device, wherein the information of the multiple serving cells and the The configuration information of multiple reference signals is sent to the terminal device in the same RRC signaling.
- an embodiment of the present application also provides a communication device.
- the communication device may have a structure as shown in FIG. 6 .
- the communication device may be a terminal device, or a chip or a chip system capable of supporting the terminal device to implement the above method.
- the communication device 600 shown in FIG. 6 may include at least one processor 602, and the at least one processor 602 is configured to be coupled with a memory, and read and execute instructions in the memory to implement the methods provided in the embodiments of the present application. The steps involved in the end device.
- the apparatus 600 may further include a transceiver 601 for supporting the apparatus 600 to receive or send signaling or data.
- the transceiver 601 in the device 600 can be used to implement the functions of the above-mentioned transceiver unit 501.
- the transceiver 601 can be used for the device 600 to perform S301 and S302, S305 or S401 and S402,
- the processor 602 can be used to implement the functions of the above-mentioned processing unit 502.
- the processor 602 can be used by the device 600 to execute S303-S304 in the communication method shown in FIG. 3, or shown in S403-S404 step.
- transceiver 601 may be coupled to antenna 603 for enabling device 600 to communicate.
- the apparatus 600 may further include a memory 604, in which computer programs and instructions are stored, and the memory 604 may be coupled with the processor 602 and/or the transceiver 601 to support the processor 602 to call the computer programs and instructions in the memory 604.
- the memory 604 may also be used to store the data involved in the method embodiment of the present application, for example, used to store the data necessary for the support transceiver 601 to realize interaction , instructions, and/or configuration information necessary for the storage device 600 to execute the methods described in the embodiments of the present application.
- An embodiment of the present application further provides a communication device, which may have a structure as shown in FIG. 7 , and the communication device may be a network device, or a chip or a chip system capable of supporting a terminal device to implement the above method.
- the communication device 700 shown in FIG. 7 may include at least one processor 702, and the at least one processor 702 is configured to be coupled with a memory, and read and execute instructions in the memory to implement the methods provided in the embodiments of the present application. The steps involved in the end device.
- the apparatus 700 may further include a transceiver 701 for supporting the apparatus 700 to receive or send signaling or data.
- the transceiver 701 in the device 700 can be used to implement the functions of the above communication unit 501.
- the transceiver 701 can be used for the device 700 to perform S301 and S302, S305 or S401 and S402, In the step shown in S405, the processor 702 can be used to implement the functions of the above-mentioned processing unit 502.
- the processor 702 can be used by the device 700 to execute S303-S304 in the communication method shown in FIG. 3, or as shown in S403-S404 step.
- transceiver 701 may be coupled to antenna 703 for enabling device 700 to communicate.
- the apparatus 700 may further include a memory 704 in which computer programs and instructions are stored, and the memory 704 may be coupled with the processor 702 and/or the transceiver 701 to support the processor 702 to call the computer programs and instructions in the memory 704
- the memory 704 may also be used to store the data involved in the method embodiment of the present application, for example, to store the data necessary to support the transceiver 701 to realize interaction , instructions, and/or configuration information necessary for the storage device 700 to execute the methods described in the embodiments of the present application.
- the embodiments of the present application further provide a computer-readable storage medium on which some instructions are stored.
- the computer can complete the above method embodiments and method implementations.
- the computer-readable storage medium is not limited, for example, it may be RAM (random-access memory, random access memory), ROM (read-only memory, read-only memory), etc.
- the present application further provides a computer program product, which, when invoked and executed by a computer, can complete the method embodiments and the methods involved in any possible designs of the above method embodiments.
- the present application further provides a chip, which may include a processor and an interface circuit, and is used to implement the above method embodiments and any possible implementation manners of the method embodiments.
- a chip which may include a processor and an interface circuit, and is used to implement the above method embodiments and any possible implementation manners of the method embodiments.
- method where "coupled” means that two components are directly or indirectly bonded to each other, which may be fixed or movable, and which may allow flow of fluids, electricity, electrical signals, or other types of signals between two components. communication between the components.
- the embodiment of the present application provides a communication method, and the communication method can be used to determine the transmit power of the uplink transmission, or to realize the uplink transmission.
- the network device configures multiple path loss reference signals for a physical uplink shared channel PUSCH transmission, and the terminal device can measure the obtained downlink path loss value according to the multiple path loss reference signals, and then the terminal device The uplink transmission power is determined according to the downlink path loss value.
- the path loss reference signal may be configured by different network devices, or the reference signal configuration information may be uniformly sent to one of the network devices for different network devices, and then sent to the terminal device by the network device.
- the above method obtains the transmission quality of the path through the coordinated measurement of different path loss reference signals, determines the transmission power of the uplink transmission, and uses the transmission power of the uplink transmission to perform the uplink transmission, thereby reducing the interference between different terminal equipment and ensuring that the network equipment manages the cell Use performance of edge terminal equipment.
- Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
- a storage medium can be any available medium that a computer can access.
- computer readable media may include RAM, ROM, electrically erasable programmable read only memory (EEPROM), compact disc read-Only memory (CD- ROM) or other optical disk storage, magnetic disk storage media, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and that can be accessed by a computer. also. Any connection can be appropriately made into a computer-readable medium.
- RAM random access memory
- ROM read only memory
- EEPROM electrically erasable programmable read only memory
- CD- ROM compact disc read-Only memory
- Any connection can be appropriately made into a computer-readable medium.
- disks and discs include compact discs (CDs), laser discs, optical discs, digital video discs (DVDs), floppy disks, and Blu-ray discs, wherein Disks usually reproduce data magnetically, while discs use lasers to reproduce data optically. Combinations of the above should also be included within the scope of computer-readable media.
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Abstract
一种通信方法及装置,涉及通信技术领域。该方法包括:终端设备根据多个参考信号中的至少两个参考信号,确定路径损耗参数,其中,所述终端设备被配置有所述多个参考信号;所述终端设备根据所述路径损耗参数,确定第一发射功率;所述终端设备根据所述第一发射功率发送第一上行传输。因此,通过该方法,网络设备为终端设备的上行传输配置多个参考信号,终端设备可以协同所述多个路损参考信号进行测量,得到的下行路径损耗值,进而终端设备可以根据所述下行路径损耗值,确定终端设备的第一上行传输功率,从而在网络设备管理小区边缘存在多个所述终端设备时,该方案可以降低各终端设备之间的干扰,保证了所述终端设备的使用性能。
Description
本申请涉及移动通信技术领域,尤其涉及一种通信方法及装置。
第5代移动通信(the 5
th generation,5G)新空口(new radio,NR)系统支持移动增强宽带,低时延可靠和大规模及其通信连接业务,因此,为了满足不同终端设备的业务对吞吐量、时延和可靠性等性能指标的需求,5G NR系统需要支持高频载波和低频载波,且上行链路需要通过更加灵活的功率控制机制实现。
在现有上行功率控制机制中,如图1所示,终端设备1和终端设备2在一个基站所管理的服务小区C中与所述基站进行通信,所述基站通过物理下行控制信道(physical downlink control channel,PDCCH)将物理上行共享信道(physical uplink shared channel,PUSCH)的上行调度信息发送给所述终端设备1或所述终端设备2。其中,所述PDCCH上承载了下行控制信息(downlink control information,简称为DCI);当UE检测到相应的PDCCH时,则根据其包含的PUSCH的上行调度信息,调度信息中包括PUSCH传输的功率信息,在所分配的信道资源上,使用相应的发送功率向基站传输所述PUSCH。
然而,多点协同场景下,即终端设备1位于小区C边缘,当其同时被两个小区服务时,基于单个小区进行测量,获得路径损耗值以确定的上行发送功率,将会导致终端设备1对其他终端设备的干扰较大,从而使得系统性能下降。
发明内容
本申请提供一种通信方法及装置,用于解决多点协同场景下上行发送功率的确定问题。
第一方面,提供一种功率控制方法,该方法由终端设备或能够支持终端设备实现该方法的通信装置(例如芯片系统)执行,在本申请中,以由终端设备执行该方法进行描述。该方法包括:终端设备根据多个参考信号中的至少两个参考信号,确定路径损耗参数,其中,所述终端设备被配置有所述多个参考信号;所述终端设备根据所述路径损耗参数,确定第一发射功率;所述终端设备根据所述第一发射功率发送第一上行传输。
通过该设计,终端设备被配置有多个参考信号,所述终端设备在配置的所述多个路损参考信号中确定至少两个参考信号,所述终端设备根据所述至少两个参考信号,得到路径损耗参数,即通过不同参考信号协同进行测量,确定所述终端设备与网络设备之间的路径传输质量,进一步,所述终端设备根据路径传输质量,确定上行传输的发射功率,因此,当网络设备管理小区边缘存在不同终端设备时,使用该方法确定所述终端设备的上行传输的发射功率,可以降低不同终端设备之间的干扰,保证了终端设备的使用性能。
在一种可能的设计中,所述终端设备根据多个参考信号中的至少两个参考信号,确定路径损耗参数,包括:所述终端设备根据所述至少两个参考信号,获得至少两个第一参数,所述至少两个参考信号中的每一个参考信号对应一个第一参数;所述终端设备根据所述至少两个第一参数,确定所述路径损耗参数;其中,所述第一参数为以下中的一个:下行路损估计值,下行路损估计值的线性值,下行路损估计值的对数值,高层滤波的测量值。
通过该设计,所述终端设备协同所述至少两个参考信号中每一个参考信号的第一参数,确定所述路径损耗参数,避免由一个参考信号的第一参数确定所述路径损耗参数所造成的不准确情况,并且该方案灵活的设置了多种第一参数类型,因此,所述终端设备可以使用不同参考信号的不同第一参数类型,灵活的确定所述路径损耗参数。
在一个可能的设计中,所述终端设备根据所述多个参考信号中的至少两个参考信号,确定路径损耗参数,包括:所述终端设备根据所述至少两个参考信号,获得一个第一参数;根据所述第一参数,确定所述路径损耗参数;所述第一参数为以下中的任意一个:下行路损估计值,下行路损估计值的线性值,下行路损估计值的对数值,高层滤波的测量值。
通过该设计,所述终端设备可以协同所述至少两个参考信号,获得一个第一参数;进一步,所述终端设备根据该第一参数,确定所述路径损耗参数,因此,该方法中所述第一参数是根据所述至少两个参考信号获得的,避免由一个参考信号获取第一参数所造成的不准确情况,并且该方案灵活的设置了多种第一参数类型,因此,所述终端设备可以使用不同参考信号所对应的不同第一参数类型,灵活的确定所述路径损耗参数。
在一个可能的设计中,所述方法还包括:所述终端设备确定所述多个参考信号中至少两个参考信号;其中,所述终端设备确定所述多个参考信号中至少两个参考信号,包括:所述终端设备获取第一下行控制信息DCI,所述第一DCI用于调度所述第一上行传输;所述终端设备根据所述第一DCI,确定所述多个参考信号中至少两个参考信号。
通过该设计,所述终端设备通过获取第一下行控制信息,可以快速的确定所述多个参考信号中的至少两个参考信号,进而根据所述至少两个参考信号,确定所述路径损耗参数。
在一个可能的设计中,所述终端设备根据所述第一DCI,确定所述多个参考信号中至少两个参考信号,包括:所述终端设备根据参考信号索引与第一字段域值的映射关系,确定与所述第一DCI中的第一字段指示的第一字段域值对应的至少两个参考信号索引值。
通过该设计,所述终端设备可以根据参考信号索引与SRI域值的映射关系,准确的确定所述至少两个参考信号的索引值,进而确定了所述多个参考信号中的至少两个参考信号。
在一个可能的设计中,所述路径损耗参数,满足以下公式:
其中,所述至少两个参考信号包括第一参考信号和第二参考信号,PL#1表示所述第一参考信号对应的所述第一下行路损估计值,PL#2表示第二参考信号对应的所述第二下行路损估计值。
通过该设计,所述终端设备通过多个参考信号中的两个参考信号,分别获得两个下行路损估计值,进而根据该两个下行路损估计值,确定路径损耗参数,从而可以保证所述路径损耗参数的准确性,避免由一个参考信号的下行路损估计值计算路径损耗参数所造成的不准确性。
在一个可能的设计中,所述路径损耗参数,满足以下公式:
PL
b,f,c=10log 10(delta1·PL#1+delta2·PL#2)
其中,所述至少两个参考信号包括第一参考信号和第二参考信号,PL#1表示所述第一参考信号对应的所述第一下行路损估计值,PL#2表示第二参考信号对应的所述第二下行路损估计值,delta1为网络设备配置给所述终端设备的参数或者为大于0且小于等于1的常数,delta2为网络设备配置给所述终端设备的参数或者为大于0且小于等于1的常数。
通过该设计,所述终端设备通过多个参考信号中的两个参考信号,分别获得两个下行路损估计值,进而根据该两个下行路损估计值,确定路径损耗参数,从而可以保证所述路径损耗参数的准确性,避免由一个参考信号的下行路损估计值计算路径损耗参数所造成的不准确性。
在一个可能的设计中,所述第一发射功率,满足以下公式:
其中,b是物理共享信道PUSCH传输所占的部分带宽BWP,f是所述PUSCH传输所占的载波,c是该载波所在的服务小区,i是发送时机,j是所述PUSCH的调度方式,q
d是参考信号资源索引,l是功控调整状态索引,P
CMAX,f,c(i)表示所述终端设备在小区为c载波为f上的最大发射功率,P
O_PUSCH,b,f,c(j)表示小区为c载波为f以及所述BWP为b上的所述PUSCH信道的目标功率值,
表示小区为c载波为f的所述BWP为b上的所述PUSCH发送时机i上PUSCH占用的RB数量,μ是子载波间隔,PL
b,f,c(q
d)表示小区为c载波为f以及所述BWP为b上的路径损耗,α
b,f,c(j)表示小区为c载波为f以及BWP为b上的路径损耗补偿因子,Δ
TF,b,f,c(i)表示对不同的传输格式的补偿,f
b,f,c(i,l)表示小区为c载波为f的上行激活部分带宽。
通过该设计,所述终端设备通过该公式计算得到第一发射功率,从而使用所述第一发射功率发送第一上行传输。
第二方面,提供一种通信方法,该方法由网络设备或能够支持网络设备实现该方法的通信装置(例如芯片系统)执行,在本申请中,以由网络设备执行该方法进行描述。该方法包括:
在一个可能的设计中,所述网络设备向终端设备发送多个参考信号的配置信息;
所述网络设备向所述终端设备发送第一指示信息,所述第一指示信息用于指示所述多个参考信号中的至少两个参考信号,所述至少两个参考信号用于确定所述第一上行传输的发送功率。
通过该设计,网络设备通过向终端设备发送第指示信息,以指示所述终端设备确定所述多个参考信号中的至少两个参考信号。
在一个可能的设计中,所述第一指示信息为第一下行控制信息DCI的第一字段,所述第一DCI用于指示所述终端设备调度第一上行传输;或者
所述第一指示信息通过无线资源控制RRC信令携带。
在一个可能的设计中,所述方法还包括:
所述网络设备确定所述多个参考信号中的所述至少两个参考信号;
所述网络设备根据参考信号索引与第一字段域值的映射关系,确定与所述至少两个参考信号对应的第一字段的第一字段域值。
通过该设计,所述第一指示信息为第一下行控制信息DCI的第一字段,通过所述第一DCI发送给终端设备,还可以通过无线资源控制RRC信令携带。从而该方法灵活的设置所述第一指示信息内容,并发送给所述终端设备。
在一个可能的设计中,所述方法还包括:
所述网络设备向所述终端设备发送所述参考信号索引与第一字段域值的映射关系。
在一个可能的设计中,还包括:
所述网络设备向所述终端设备发送所述多个参考信号对应的多个服务小区的信息,其中,所述多个服务小区的信息和所述多个参考信号的配置信息在同一个RRC信令中发送给所述终端设备。
第三方面,本申请提供一种通信装置,该装置具有实现上述第一方面或上述第一方面的任意一种可能的设计中所述方法的功能。该功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第四方面,本申请实施例中还提供一种计算机存储介质,该存储介质中存储软件程序,该软件程序在被一个或多个处理器读取并执行时可实现第一方面或其中任意一种设计提供的方法。
第五方面,本申请实施例还提供一种包含指令的计算机程序产品,当其在计算机上运行时,使得计算机执行上述第一方面或其中任一种设计提供的方法。
第六方面,本申请实施例提供了一种芯片系统,该芯片系统包括处理器,用于支持终端设备实现上述第一方面中所涉及的功能。在一种可能的设计中,所述芯片系统还包括存储器,所述存储器,用于保存终端设备必要的程序指令和数据。该芯片系统,可以由芯片构成,也可以包含芯片和其他分立器件。
图1为现有技术的功率控制机制适用的一种通信系统的示意图;
图2A为本申请实施例提供的一种移动通信系统的示意图;
图2B为本申请实施例提供的另一种移动通信系统的示意图;
图3为本申请实施例提供的一种通信方法流程的示意图;
图4为本申请实施例提供的一种通信装置的结构示意图;
图5为本申请实施例提供的另一种通信装置的结构示意图;
图6为本申请实施例提供的一种通信设备的结构示意图;
图7为本申请实施例提供的另一种通信设备的结构示意图。
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述。
以下,对本申请实施例中的部分用语进行解释说明,以便于本领域技术人员理解。
1)、终端设备,可以简称为终端,也称为用户设备(user equipment,UE),终端设备是用户侧的一种用于接收或发射信号的实体,如手机UE。终端设备也可以称为终端Terminal、用户设备(user equipment,UE)、移动台(mobile station,MS)、移动终端(mobile terminal,MT)等。终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality,VR)终端设备、增强现实(Augmented Reality,AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self-driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中 的无线终端、智慧家庭(smart home)中的无线终端等等。终端设备也可以是固定的或者移动的。本申请的实施例对终端设备所采用的具体技术和具体设备形态不做限定。
本申请实施例中,用于实现终端的功能的装置可以是终端设备;也可以是能够支持终端设备实现该功能的装置,例如芯片系统,该装置可以被安装在终端设备中。本申请实施例中,芯片系统可以由芯片构成,也可以包括芯片和其他分立器件。本申请实施例提供的技术方案中,以用于实现终端设备的功能的装置是终端设备为例,描述本申请实施例提供的技术方案。
2)、网络设备,可以是接入网设备,接入网设备也可以称为无线接入网(radio access network,RAN)设备,是一种为终端设备提供无线通信功能的设备。接入网设备例如包括但不限于:5G中的下一代基站(generation nodeB,gNB)、演进型节点B(evolved node B,eNB)、基带单元(baseband unit,BBU)、收发点(transmitting and receiving point,TRP)、发射点(transmitting point,TP)、未来移动通信系统中的基站或WiFi系统中的接入点等。接入网设备还可以是云无线接入网络(cloud radio access network,CRAN)场景下的无线控制器、集中单元(central unit,CU),和/或分布单元(distributed unit,DU),或者网络设备可以为中继站、车载设备以及未来演进的公共陆地移动网(public land mobile network,PLMN)网络中的网络设备等。
终端设备可以与不同技术的多个接入网设备进行通信,例如,终端设备可以与支持长期演进(long term evolution,LTE)的接入网设备通信,也可以与支持5G的接入网设备通信,还可以同时与支持LTE的接入网设备以及支持5G的接入网设备进行通信。本申请实施例并不限定。
本申请实施例中,用于实现网络设备的功能的装置可以是网络设备;也可以是能够支持网络设备实现该功能的装置,例如芯片系统,该装置可以被安装在网络设备中。在本申请实施例提供的技术方案中,以用于实现网络设备的功能的装置是网络设备为例,描述本申请实施例提供的技术方案。本申请的实施例对无线接入网设备所采用的具体技术和具体设备形态不做限定。
本申请实施例的技术方案可以应用于各种通信系统,例如:长期演进(long term evolution,LTE)系统第五代(5th generation,5G)移动通信系统中的新无线(new radio,NR)系统以及未来的移动通信系统等。
3)、本申请实施例涉及的路径损耗参数,可以为传输损耗值,即通过计算数据或信号传输的功率损耗量,确定用于传输该数据或信号路径的质量,进而发射端可以根据路径的质量确定其使用的发射功率。所述路径损耗参数包括多种类型,例如:路损估计值、路损估计值的对数值、路损估计值的线性值,以及可以体现路径损耗情况的高层滤波的测量值等,其中,所述路损估计值、路损估计值的对数值、路损估计值的线性值、高层滤波的测量值均可以作为路径的传输损耗值,以用于确定传输路径的质量。
4)、本申请实施例涉及的参考信号,可以指“导频”信号,是由发射端提供给接收端用于信道估计或信道探测的一种已知信号,用于信道估计、信道质量的测量等。通常参考信号可包括上行参考信号和下行参考信号,例如,上行参考信号指终端设备向基站发送信号,下行参考信号指基站向终端设备发送信号。上行参考信号主要包括解调参考信号(DMRS:Demodulation Reference Signal,DM-RS)和信道探测参考信号(Sounding Reference Signal,SRS),下行参考信号主要包括信道状态信息(Channel State Information,CSI)参 考信号、多播/组播单频网络参考信号(Multicast Broadcast Single Frequency Network-Reference Signal,MBSFN-RS)、移动台特定的参考信号UE-specific RS、定位参考信号(Positioning Reference Signal,PRS))、信道状态信息-参考信号(Channel State Information-Reference Signal,CSI-RS)。
5)、本申请实施例涉及的下行控制信道(Downlink Control Information,DCI),主要为下行控制信道PDCCH承载的由网络设备发送给终端设备的上下行数据传输相关的控制信息,例如数据传输的资源分配信息、时隙内上行或下行资源的格式信息,以及上下数据信道和信号的控制信息等。
6)、本申请实施例涉及的资源指示信息SRI字段,可以指基于非码本的传输下终端设备根据DCI中的宽带SRI字段确定其PUSCH信道的预编码和传输等级,为PUSCH选择发送波束,即当基站配置了多个SRS资源时,调度PUSCH需要选择其中一个或者多个SRS资源表征PUSCH的发送波束,可以通过SRI指示不同的值对应不同的功控集合set,可以使能不同的PUSCH发送波束采用独立的功控集合set增加传输性能。
7)、本申请实施例涉及的多个,是指两个或两个以上。“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
另外,需要理解的是,在本申请的描述中,“第一”、“第二”等词汇,仅用于区分描述的目的,而不能理解为指示或暗示相对重要性,也不能理解为指示或暗示顺序。
请参考图2A,其为本申请实施例可应用的一种移动通信系统的架构示意图。如图2A所示,该移动通信系统包括一个核心网设备210A、一个无线接入网设备220A和至少一个终端设备(例如图2A中的终端设备231A和/或终端设备232A)。终端设备231A或终端设备232A均可以通过无线的方式与所述无线接入网设备220A相连,所述无线接入网设备220A可以通过无线或有线方式与所述核心网设备210A连接。
或者请参考图2B,其为本申请实施例可应用的另一种移动通信系统的架构示意图。如图2B所示,该移动通信系统包括一个核心网设备210B、至少两个无线接入网设备(例如图2B中的无线接入网设备221B和无线接入网设备222B)和至少一个终端设备230B。所述终端设备230B可以分别通过无线的方式与所述无线接入网设备220A、所述无线接入网设备220B相连,所述无线接入网设备221B和无线接入网设备222B分别可以通过无线或有线方式与所述核心网设备210B连接。
其中,图2A和图2B的移动通信系统中的核心网设备与无线接入网设备可以是独立的不同的物理设备,也可以是将核心网设备的功能与无线接入网设备的逻辑功能集成在同一个物理设备上,还可以是一个物理设备上集成了部分核心网设备的功能和部分的无线接入网设备的功能。终端设备可以是固定位置的,也可以是可移动的。另外,该通信系统中还可以包括其它网络设备,例如无线中继设备和无线回传设备。本申请的实施例对该移动通信系统中包括的核心网设备、无线接入网设备和终端设备的数量不做限定。
在上述图2A的移动通信系统中,终端设备231A或终端设备232A与一个无线接入网设备220A(例如基站)进行通信时,所述无线接入网设备220A通过物理下行控制信道PUSCH,将物理下行共享信道PUSCH的上行调度信息发送给所述终端设备231A或所述终端设备232A。具体的,所述PDCCH上承载了下行控制信息DCI,所述PUSCH的上行调度信息承载于所述DCI格式0中,因此,当所述终端设备231A或所述终端设备232A 检测到相应的PDCCH时,则根据其包含的PUSCH的上行调度信息,在所分配的信道资源上,使用相应的发射功率向所述无线接入网设备220A发送所述PUSCH。
因此,为了确定所述终端设备231A或所述终端设备232A发送所述PUSCH的发射功率时,现有技术中,基于单小区/传输点测量的上行功率控制机制确定所述发射功率。
下面对所述单小区/传输点测量的上行功率控制机制进行详细介绍。
以图2A的移动通信系统为例,其中,终端设备231A基于一个所述无线接入网设备220A(例如基站)进行测量,以确定所述终端设备231A发送所述PUSCH信道的发射功率。
其中,所述终端设备231A可以根据以下公式确定发送所述PUSCH信道的发射功率:
下面对所述PUSCH的发射功率满足的公式中的各参数量进行具体的介绍:
P
PUSCH,b,f,c(i,j,q
d,l)表示所述终端设备231A在小区为c载波为f以及所述BWP为b上发送所述PUSCH信道的发射功率。
P
CMAX,f,c(i)表示为服务小区c的载波f上PUSCH信道发送时机i上配置的最大输出功率,该最大输出功率与所述终端设备231A的发送能力、所述PUSCH的频域资源分配等因素相关。
P
O_PUSCH,b,f,c(q
u)表示服务小区为c载波为f以及BWP为b上的所述PUSCH信道目标功率值,α
b,f,c(j)表示小区为载波为c载波为f以及BWP为b上的路径损耗补偿因子。所述P
O_PUCCH,b,f,c(q
u)和所述α
b,f,c(j)可以统一表示为开环功率参数。
当无线接入网设备220A(例如基站)配置了多个指示P
O和α取值的参数集合时,所述终端设备231A会根据当前传输模式(包括初始接入传输,基于下行控制信息DCI的数据调度传输,基于无线接入控制RRC的数据调度传输等)以及信号指示信息第一字段指示的值,确定当前所述PUSCH传输采用的参数集合编号j,进一步根据确定P
O和α取值;其中,每个参数集合内的参数包括该集合的身份标识(identity document,ID),P
O值、α值。
其中,所述终端设备231A确定所述P
O和α取值对应的参数集合,具体包括以下两种方式:
第一种:当所述终端设备231A被配置了多个功率参数集合,且调度所述PUSCH的下行控制信息DCI中包括SRI字段,以及配置了功率参数和SRI对应规则SRI-PUSCH-PowerControl时,所述终端设备231A可以根据SRI指示信息和多个参数集合之间的映射关系,确定实际发送所述PUSCH采用的参数集合,其中,所述映射关系也是无线资源控制RRC配置的。
其中,需要说明的是,所述SRI为SRS资源指示信息,主要用于为发送所述PUSCH选择发送波束,即当无线接入设备220A(例如基站)配置了多个SRS资源时,为了调度所述PUSCH,需要选择其中一个或者多个SRS资源表征所述PUSCH的发送波束,因此, 通过SRI指示不同的值对应不同的功控参数集合,从而使不同的PUSCH发送波束采用独立的功控参数集合来提高传输性能。同时SRI字段还用于指示功率参数。
所述SRI字段指示,示例性的:所述SRI用于指示选择的SRS资源编号。一个SRI字段的取值对应一个功率参数集合。例如,无线接入网设备220A(例如基站)配置的SRI字段2比特有00/01/10/11四个码位,每个码位对应一个功率参数集合(P
O、α)。
第二种:当所述终端设备231A确定配置了多个参数集合,且调度所述PUSCH的下行控制信息DCI中不包括SRI字段时,默认j=2,所述终端设备231A在多个参数集合的ID中确定第一ID对应的参数集合,从而根据所述第一ID对应的参数集合,确定所述P
O和所述α值。
μ是子载波间隔(Subcarrier Size,SCS)配置对应的值,例如下表1所示:
表1
μ | 子载波间隔Δf=2 μ·15(kHz) |
0 | 15 |
1 | 30 |
2 | 60 |
3 | 120 |
4 | 240 |
PL
b,f,c(q
d)表示为所述终端设备231A通过参考信号的索引值q
d计算得到的下行路径损耗估计值,将所述下行路径损耗估计值作为上行功率控制的路径损耗补偿值。其中,所述参考信号的索引值q
d的具体确定方式包括以下几种:
第一种:如果所述终端设备231A被配置了多个参考信号ID,包括一组参考信号SSB和/或一组参考信号CSI-RS资源。其中,每个参考信号ID的取值映射到一个SSB索引,每个所述SSB资源索引由参数ssb-Index配置;或者,每个参考信号ID取值映射到一个CSI-RS索引,每个所述CSI-RS资源索引由参数csi-RS-Index配置。在一组参考信号索引中,所述终端设备231A可以通过SSB资源索引或者CSI-RS资源索引确定某一个参考信号ID。
第二种:如果所述终端设备231A被配置了SRI与PUSCH功率参数的映射关系(SRI-PUSCH-Power Control),且被配了多个参考信号ID。所述终端设备231A会获取SRI字段的一个取值,根据SRI字段取值和PUSCH的功率参数ID的映射关系,确定参考信号ID与SRI字段取值的对应关系,进一步,所述终端设备231A根据所述参考信号ID与SRI字段取值的对应关系,确定对应的参考信号ID。
第三种:如果所述PUSCH传输由下行控制信息DCI格式0_0调度,且所述终端设备231A获取了PUSCH资源的空间配置信息(PUSCH-SpatialRelationInfo),则所述终端设备231A在多个PUSCH资源中,将索引号最小的PUSCH资源中PUSCH传输所用的参考信号ID作为所述PUSCH传输所用的参考信号ID。
第四种:如果所述PUSCH传输由DCI格式0_1调度,且所述终端设备231A获取了SRS默认波束参数(enableDefaultBeamPlForSRS),同时所述终端设备231A没有被配置PUSCH路损参考信号,所述终端设备231A将PUSCH传输相关的SRS资源所在的SRS资源集合对应的路损参考信号确定为所述PUSCH参考信号。
第五种:如果所述PUSCH传输由DCI格式0_0调度,且所述终端设备231A没有获取PUSCH资源的空间配置信息(PUSCH-SpatialRelationInfo),或者所述PUSCH传输由下行控制信息DCI格式0_1调度且所述DCI中不包含SRI字段,或者所述终端设备231A没有获取SRI和PUSCH功率参数对应关系的配置信息,所述终端设备231A确定所述参考信号的ID为0。
第六种:如果所述PUSCH传输由DCI格式0_0调度,同时所述终端设备231A没有获取当前服务小区激活上行BWP的PUSCH资源的配置信息,并且所述终端设备231A获取enableDefaultBeamPlForPUSCH0配置信息,则所述终端设备231A确定的所述参考信号对应传输配置指示(Transmission Configuration Indication,TCI)状态中的QCL-TypeD或者当前服务小区的激活下行BWP中索引号最小的物理资源CORESET的QCL假设。
针对配置授权PUSCH
例如1:Type I配置授权PUSCH,即配置了RRC配置下行授权(rrc-Configured Uplink Grant)时,所述终端设备231A确定所述参考信号是由所述rrc-ConfiguredUplinkGrant中的路径损耗参考索引pathloss Reference Index参数配置的
例如2:Type II配置授权PUSCH,即没有配置rrc-ConfiguredUplinkGrant时,所述终端设备231A根据激活DCI中的SRI字段上映射的PUSCH参考信号q
d,确定所述参考信号。
第七种:对于DCI调度的PUSCH传输,或者DCI激活的配置授权PUSCH传输,如果激活DCI中不包含SRI字段,所述终端设备231A确定的所述参考信号资源索引q
d=0
第八种:如果所述终端设备231A没有配PUSCH-pathlossReferenceRS,或者在所述终端设备231A配置专用参数之前,所述终端设备231A利用SSB计算路损,该SSB用于获取主信息块(Master information block,MIB)
第九种:如果PUSCH传输是由RAR UL grant(random access response,随机接入响应)调度的,所述终端设备231A采用和相关的PRACH传输相同的参考信号索引来计算下行路损。
其中,下行路损估计值的计算公式可以满足以下公式:
Pathloss=referenceSignalPower-higher layer filtered RSRP。
其中,referenceSignalPower表示高层信令配置的下行参考信号的发送功率,higher layer filtered RSRP0表示终端设备接收到的经过高层滤波后的参考信号接收功率。
若所述终端设备231A没有配置接收周期CSI-RS,则所述ReferenceSignalPower通过同步广播信号块功率ss-PBCH-BlockPower配置。
如果所述终端设备231A配了接收周期CSI-RS,referenceSignalPower通过ss-PBCH-BlockPower和powerControlOffsetSS配置(CSI-RS与SSB二者传输功率之间的offset)。
如果所述终端设备231A没有被配置powerControlOffsetSS,所述终端设备231A确定offset=0。
Δ
TF,b,f,c(i)表示为对不同的传输格式的补偿,该信息根据PUSCH承载的信息类型(例如承载UL-SCH数据信息,或者CSI信息等)、占用的物理资源位置、数量、调制阶数等因素确定。
f
b,f,c(i,l)是服务小区c的载波f的上行激活部分带宽(Bandwidth part)b上的PUSCH发送时机i上的PUSCH功率控制调整状态,该信息可以由无线接入设备220A(例如基站)下发下行控制信息DCI信令通知的,可以使得所述无线接入设备220A根据当前传输的信道状态、调度情况实时调整PUSCH发送功率,其中,具体机制如下:所述DCI中携带传输功率控制(Transmission Power Control,TPC)字段用于指示δ
PUSCH,b,f,c(i,l)的取值(参见下面的表2),l∈{0,1}。
当DCI为所述终端设备231A专用的DCI格式(仅配置该所述终端设备231A去检测该DCI)时,所述终端设备231A根据该DCI中的SRI字段指示值和l的映射关系,确定当前PUSCH对应的δ
PUSCH,b,f,c(i,l)。
当DCI为公共的DCI格式(多个终端设备共同检测该DCI)时,该DCI中携带1比特指示l∈{0,1}中的一个值;也就是说,所述终端设备231A根据SRI字段指示的值只累加l取值相同的TPC指示。
当DCI为紧凑的DCI格式或者DCI中没有SRI字段,l=0。
所述终端设备231A根据上述确定的δ
PUSCH,b,f,c(i,l)进一步确定f
b,f,c(i,l):
综上所述,现有技术中,基于单小区/传输点测量的上行功率控制机制,确定所述终端设备231A发送所述PUSCH的发射功率。在该方法中,所述终端设备231A只能通过接收一个无线接入设备210A(例如基站)的单一参考信号进行测量,确定所述终端设备231A与所述无线接入设备210A之间的传输路径损耗估计值,从而根据所述路径损耗估计值确定所述终端设备231A的上行发射功率。然而,通过该方法确定各所述终端设备的上行发射功率并不准确,若确定的所述上行发射功率过大,所述终端设备231A将对其它终端设备(例如终端设备232A)的存在较大干扰,若确定的所述上行发射功率过小,则无法保证所述无线接入网设备220A(例如基站)能全部接收到。
因此,本申请实施例提供了一种通信方法,该通信方法可以用于确定上行传输的发送功率,或者用于实现上行传输。该方法中,网络设备为一个物理上行共享信道PUSCH传输配置多个路损参考信号,所述终端设备可以根据所述多个路损参考信号,测量得到的下行路径损耗值,进而所述终端设备根据所述下行路径损耗值,确定上行传输功率。其中,所述路损参考信号可以由同一网络设备所配置的,或者所述路损参考信号可以由不同网络设备所配置的,还可以为不同网络设备将参考信号配置信息统一发送给其中一个网络设备,由该网络设备发送给所述终端设备。因此,所述方法通过不同路损参考信号协同测量获得信道传输质量,并确定上行传输的发射功率,使用该上行传输的发射功率进行上行传输,从而降低不同终端设备之间的干扰,保证了网络设备管理小区边缘终端设备的使用性能。
在本申请实施例提供的一种通信方法中,还涉及到了一种最大比合并算法(Maximum ratio combination,MRC),所述最大比合并是现有技术中分集合并技术中的最优选择,相比选择合并和等增益合并,所述最大比合并算法可以获得更好的性能,所述性能的提升是通过Array Gain带来的更高的信噪比,进而带来更好的误码率特性决定的。
下面对所述最大比合并算法进行以下介绍。
例如,在接收端有多根接收天线时,接收机分集是一种空间分集。
假设第i个接收天线的接收信号为y
i=h
ix+n
i,其中y
i表示在第i个接收天线上接收到的符号,h
i表示第i个接收天线对应的信道,x为传输符号,n
i表示第i个接收天线对应的噪声。以矩阵形式表示为:
y=hx+n
其中,y=[y
1y
2...y
N]
T,表示所有接收天线的接收符号,h=[h
1h
2...h
N]
T表示所有接收天线上的信道,n=[n
1n
2...n
N]
T表示所有接收天线对应的噪声。
等效符号表示为:
所有接收天线的信道能量之和满足以下公式:
本申请提供一种通信方法的流程图,该通信方法可以用于确定上行发射功率,还可以用于使用所述上行发射功率实现上行传输。因此,本申请实施例提供了两种方案,用于具体确定上行发射功率,以实现上行传输。
请参考图3,其为本申请实施例提供的一种通信方法的实施流程图。该方法可由终端设备或能够支持终端设备实现该方法的通信装置(例如芯片系统)执行,在本申请中,以由终端设备执行该方法为例进行描述。该方法可应用于图2A-2B所示的通信系统,当然也可应用于除此之外的通信系统,本申请对此不做限定。参阅图3所示,该方法可包括如下处理流程。
S301:网络设备向终端设备发送多个参考信号的配置信息,所述终端设备接收到所述多个参考信号的配置信息。
在一种实施方式中,所述网络设备向所述终端设备发送所述多个参考信号。可选的,所述多个参考信号的配置信息在同一个RRC信令中发送给所述终端设备。
在一种实施方式中,所述网络设备向所述终端设备发送所述多个参考信号对应的多个服务小区的信息,其中,所述多个服务小区的信息和所述多个参考信号的配置信息在同一个RRC信令中发送给所述终端设备。
本申请中,所述多个参考信号的配置信息可以包括所述参考信号的时频资源、以及指示信息等用于配置所述多个参考信号的相关信息等,本申请对此不做具体限制。
S302:所述网络设备向所述终端设备发送第一指示信息,所述终端设备接收所述第一指示信息。所述第一指示信息用于指示所述多个参考信号中的至少两个参考信号,所述至少两个参考信号用于确定所述第一上行传输的发送功率。
可选的,所述第一指示信息为第一下行控制信息DCI的第一字段,所述第一DCI用于指示所述终端设备调度第一上行传输,可选的,所述第一字段为SRS资源指示信息;或者所述第一指示信息通过无线资源控制RRC信令携带。
在本申请中,所述网络设备向所述终端设备发送第一指示信息之前,还包括:
所述网络设备确定所述多个参考信号中的所述至少两个参考信号;
所述网络设备根据参考信号索引与第一字段域值的映射关系,确定与所述至少两个参考信号对应的第一字段的第一字段域值。所述网络设备向所述终端设备发送所述参考信号 索引与第一字段域值的映射关系。
一个可能的示例中,所述网络设备确定所述多个参考信号中的所述至少两个参考信号,可以通过以下任意一种方式确定:
方式一:所述网络设备根据所述第一字段域值和至少两个功率参数对应关系,基于所述至少两个功率参数,确定所述至少两个参考信号。
方式二:所述网络设备获取所述终端设备发送的参考信号资源索引的指示信息,根据所述参考信号资源索引的指示信息,确定所述至少两个参考信号;或者
方式三:所述网络设备将无线资源控制层RRC配置上行授权中的路径损耗参考指数所配置的至少两个参考信号作为所述至少两个参考信号;或者
方式四:所述网络设备将激活的下行控制信息DCI中第一字段(例如SRS字段)对应的至少两个参考信号作为所述至少两个参考信号;或者
方式五:所述网络设备获取所述终端设备上行传输对应的空间配置信息,根据所述空间配置信息中包含的至少两个参考信号作为所述至少两个参考信号;或者
方式六:所述网络设备将已配置的多个参考信号集合中索引号从小到大的至少两个参考信号作为所述至少两个参考信号;或者
方式七:所述网络设备确定所述终端设备上行传输对应的第一资源(例如SRS资源)所在的第一资源集合(例如SRS资源集),将所述第一资源集合关联的至少两个参考信号作为所述至少两个参考信号;或者
方式八:所述网络设备根据传输配置指示状态或激活下行部分带宽中索引号从小到大的至少两个资源集合,确定所述至少两个参考信号。
S303:所述终端设备根据多个参考信号中的至少两个参考信号,确定路径损耗参数,其中,所述终端设备被配置有所述多个参考信号。
在一种实施方式中,所述终端设备还需要在所述多个参考信号中,确定所述至少两个参考信号;所述终端设备确定多个参考信号中的至少两个参考信号,包括:
所述终端设备获取第一下行控制信息DCI,所述第一DCI用于调度所述第一上行传输;
所述终端设备根据所述第一DCI,确定所述多个参考信号中至少两个参考信号。
具体的,所述终端设备根据所述第一DCI,确定所述多个参考信号中至少两个参考信号,包括:
所述终端设备根据参考信号索引与第一字段域值的映射关系,确定与所述第一DCI中的第一字段指示的第一域值对应的至少两个参考信号索引值。可选的,所述第一字段为SRS资源指示信息。
在一种实施方式中,所述终端设备根据多个参考信号中的至少两个参考信号,确定路径损耗参数,具体可以包括以下两种方法:
在第一种方法中,所述终端设备根据多个参考信号中的至少两个参考信号,确定路径损耗参数,包括:所述终端设备根据所述至少两个参考信号,获得至少两个第一参数,所述至少两个参考信号中的每一个参考信号对应一个第一参数;所述终端设备根据所述至少两个第一参数,确定所述路径损耗参数;其中,所述第一参数为以下中的任意一下:下行路损估计值,下行路损估计值的线性值,下行路损估计值的对数值,高层滤波的测量值。
例如,所述终端设备确定多个参考信号中的两个参考信号为第一参考信号和第二参考信号,根据所述第一参考信号和所述第二参考信号,确定第一下行路损估计值和第二下行 路损估计值(所述第一下行路损估计值和所述第二下行路损估计值均属于上述第一参数);所述终端设备根据所述第一下行路损估计值和所述第二下行路损估计值,确定所述路径损耗参数。
所述路径损耗参数满足以下公式:
其中,PL#1(还可表示为Pathloss#1)表示所述第一参考信号对应的所述第一下行路损估计值,PL#2(还可表示为Pathloss#2)表示第二参考信号对应的所述第二下行路损估计值。其中,Path loss#1和Path loss#1的值可以通过以下公式确定:
Path loss#1=referenceSignalPower#1-higher layer filtered RSRP#1 公式二
Path loss#2=referenceSignalPower#2-higher layer filtered RSRP#2 公式三
其中,referenceSignalPower#1表示高层信令配置的第一参考信号的发送功率,higher layer filtered RSRP#1表示终端设备端接收到第一参考信号经过高层滤波后的参考信号接收功率。referenceSignalPower#2表示高层信令配置的第二路损参考信号的发送功率,higher layer filtered RSRP#2表示终端设备端接收到第二参考信号,经过高层滤波后的参考信号接收功率。
在第二种方法中,所述终端设备根据所述多个参考信号中的至少两个参考信号,确定路径损耗参数,包括:所述终端设备根据所述至少两个参考信号,获得一个第一参数;根据所述第一参数,确定所述路径损耗参数;所述第一参数为以下中的任意一个:下行路损估计值,下行路损估计值的线性值,下行路损估计值的对数值,高层滤波的测量值。
例如,所述终端设备根据多个参考信号中的两个参考信号,即第一参考信号和第二参考信号,根据所述第一参考信号和所述第二参考信号,确定一个第一下行路损估计值(所述第一下行路损估计值属于上述第一参数);所述终端设备根据所述一个第一参数,确定所述路径损耗参数。
所述路径损耗参数满足以下公式:
PL
b,f,c=f(q
d1,q
d2)
公式四
其中,f(q
d1,q
d2)表示由所述第一参考信号和所述第二参考信号确定的第一下行路损估计值(即所述第一参数),q
d1表示所述第一参考信号的索引,q
d2表示所述第二参考信号的索引。
S304:所述终端设备根据所述路径损耗参数,确定第一发射功率。
S305:所述终端设备根据所述第一发射功率发送第一上行传输。
在执行S304步骤时,具体还包括以下内容:
在一种实施方式中,基于S303中确定的路径损耗参数,根据所述终端设备根据所述路径损耗参数,确定第一发射功率,其中,所述第一发射功率,满足以下公式:
其中,b是物理共享信道PUSCH传输所占的部分带宽BWP,f是所述PUSCH传输所占的载波,c是该载波所在的服务小区,i是发送时机,j是所述PUSCH的调度方式,q
d 是参考信号资源索引,l是功控调整状态索引,P
PUSCH,b,f,c(i,j,q
d,l)表示所述终端设备在小区为c载波为f以及所述BWP为b上发送所述PUSCH信道的发射功率,P
CMAX,f,c(i)表示所述终端设备在小区为c载波为f上的最大发射功率,P
O_PUSCH,b,f,c(j)表示小区为c载波为f以及所述BWP为b上的所述PUSCH信道的目标功率值,
表示小区为c载波为f的所述BWP为b上的所述PUSCH发送时机i上PUSCH占用的RB数量,μ是子载波间隔,PL
b,f,c(q
d)表示小区为c载波为f以及所述BWP为b上的路径损耗,α
b,f,c(j)表示小区为c载波为f以及BWP为b上的路径损耗补偿因子,Δ
TF,b,f,c(i)表示对不同的传输格式的补偿,f
b,f,c(i,l)表示小区为c载波为f的上行激活部分带宽。
进一步,在本申请中,所述终端设备将所述第一参考信号(当所述多个参考信号来自不同服务小区时,默认所述第一参考信号为主服务小区的参考信号)的第一下行路损估计值作为第一上行路损补偿值。所述终端设备根据所述第一上行路损补偿值,以及网络设备配置的目标补偿因子和目标功率值,以及S304中由公式五计算得到的第一发射功率P
PUSCH,b,f,c(i,j,q
d,l),确定第一上行传输功率P。
在一种实施方式中,基于根据最大比合并原理,确定所述第一上行传输功率。
具体的,当终端设备的服务小区包括主服务小区和协作服务小区,所述终端设备到主服务小区的信道为h
1,所述终端设备到协作小区的信道为h
2,因此,所述终端设备的发送功率满足以下公式时,
所述终端设备才能够保证主服务小区和协作小区接收到的所述终端设备上行传输功率之和为单站传输时期待接收到的功率,即满足下述公式:
又因为E
r=|h|
2E
t,E
r为终端设备接收信号能量的线性值,E
t为网络设备发送信号能量的线性值。而在所述终端设备计算下行路径损耗估计值的公式中Path loss=referenceSignalPower-higher layer filtered RSRP,路损值、参考信号发送功率和终端设备接收功率为对数值。可得:
根据公式八可得:
将求公式十一求对数,得到公式十二:
其中,P
COMP表示所述上行传输的发送功率值,pathloss#1表示所述多个参考信号中第一参考信号对应的所述第一下行损耗值,pathloss#2表示所述多个参考信号中第二参考信号对应的所述第二下行损耗值,P表示第一发射功率值。需要注意的是,P与S304中计算得到的第一发射功率P
PUSCH,b,f,c(i,j,q
d,l)表示相同。
本申请实施例中提供了第二种方案,该方法可以由终端设备和网络设备执行,也可以由终端设备和网络设备中的芯片执行,该方法包括:
S401与上述S301执行相同内容,S402与上述S302执行相同内容。
S403:所述终端设备根据多个参考信号中的至少两个参考信号,确定路径损耗参数,其中,所述终端设备被配置有所述多个参考信号。
在一种实施方式中,所述路径损耗参数,满足以下公式:
PL
b,f,c=10log10(delta1·PL#1+delta2·PL#2) 公式十三
其中,所述至少两个参考信号包括第一参考信号和第二参考信号,PL#1表示所述第一参考信号对应的所述第一下行路损估计值,PL#2表示第二参考信号对应的所述第二下行路损估计值,delta1为网络设备(例如基站)配置给所述终端设备(用户)的参数或者为大于0且小于等于1的常数,delta2为所述网络设备(例如基站)配置给所述终端设备的参数或者为大于0且小于等于1的常数。
S404与上述S304执行相同内容。
将第二种方案中,根据多个参考信号中的至少两个参考信号,确定路径损耗参数,即将公式十三计算得到的值,通过S304中公式五至公式十三,计算得到上行传输的发送功率值。
S405与上述S305执行相同内容。
本申请实施例提供了一种通信方法,该通信方法可以用于确定上行传输的发送功率,或者用于实现上行传输。该方法中,网络设备为一个物理上行共享信道PUSCH传输配置多个路损参考信号,所述终端设备可以根据所述多个路损参考信号,测量得到的下行路径损耗值,进而所述终端设备根据所述下行路径损耗值,确定上行传输功率。其中,所述路损参考信号可以由不同网络设备所配置的,还可以为不同网络设备将参考信号配置信息统一发送给其中一个网络设备,由该网络设备发送给所述终端设备,因此,所述方法通过不同路损参考信号协同测量获得路径传输质量,并确定上行传输的发射功率,使用该上行传输的发射功率进行上行传输,从而降低不同终端设备之间的干扰,保证了网络设备管理小区边缘终端设备的使用性能。
基于同一发明构思,本申请实施例还提供一种通信装置,该通信装置可以具有如图4 所示的结构,且具有上述方法实施例中终端设备的行为功能。如图4所示,该装置400可包括通信单元401以及处理单元402,下面对各单元进行具体的介绍。
处理单元401,用于根据多个参考信号中的至少两个参考信号,确定路径损耗参数,其中,所述终端设备被配置有所述多个参考信号;
所述处理单元402,还用于根据所述路径损耗参数,确定第一发射功率;
通信单元401,用于根据所述第一发射功率发送第一上行传输。
一种可能的设计中,所述处理单元在根据多个参考信号中的至少两个参考信号,确定路径损耗参数时,具体用于:
根据所述至少两个参考信号,通过所述通信单元获得至少两个第一参数,所述至少两个参考信号中的每一个参考信号对应一个第一参数;
根据所述至少两个第一参数,确定所述路径损耗参数;
其中,所述第一参数为以下中的一个:下行路损估计值,下行路损估计值的线性值,下行路损估计值的对数值,高层滤波的测量值。
一种可能的设计中,所述处理单元402在根据所述多个参考信号中的至少两个参考信号,确定路径损耗参数时,具体用于:
所述终端设备根据所述至少两个参考信号,获得一个第一参数;
根据所述第一参数,确定所述路径损耗参数;
所述第一参数为以下中的一个:下行路损估计值,下行路损估计值的线性值,下行路损估计值的对数值,高层滤波的测量值。
一种可能的设计中,所述处理单元402还用于:确定所述多个参考信号中至少两个参考信号;
其中,所述处理单元402在确定所述多个参考信号中至少两个参考信号时,具体用于:
通过所述通信单元获取第一下行控制信息DCI,所述第一DCI用于调度所述第一上行传输;
根据所述第一DCI,确定所述多个参考信号中至少两个参考信号。
一种可能的设计中,所述处理单元402在根据所述第一DCI,确定所述多个参考信号中至少两个参考信号时,具体用于:
根据参考信号索引与SRI域值的映射关系,确定与所述第一DCI中的第一字段指示的第一字段域值对应的至少两个参考信号索引值。
一种可能的设计中,所述路径损耗参数,满足以下公式:
其中,所述至少两个参考信号包括第一参考信号和第二参考信号,PL#1表示所述第一参考信号对应的所述第一下行路损估计值,PL#2表示第二参考信号对应的所述第二下行路损估计值。
一种可能的设计中,所述路径损耗参数,满足以下公式:
PL
b,f,c=10log10(delta1·PL#1+delta2·PL#2)
其中,所述至少两个参考信号包括第一参考信号和第二参考信号,PL#1表示所述第一参考信号对应的所述第一下行路损估计值,PL#2表示第二参考信号对应的所述第二下行路损估计值,delta1为网络设备配置给所述终端设备的参数或者为大于0且小于等于1的常 数,delta2为所述网络设备配置给所述终端设备的参数或者为大于0且小于等于1的常数。
一种可能的设计中,所述第一发射功率,满足以下公式:
其中,b是物理共享信道PUSCH传输所占的部分带宽BWP,f是所述PUSCH传输所占的载波,c是该载波所在的服务小区,i是发送时机,j是所述PUSCH的调度方式,q
d是参考信号资源索引,l是功控调整状态索引,P
PUSCH,b,f,c(i,j,q
d,l)表示所述终端设备在小区为c载波为f以及所述BWP为b上发送所述PUSCH信道的发射功率,P
CMAX,f,c(i)表示所述终端设备在小区为c载波为f上的最大发射功率,P
O_PUSCH,b,f,c(j)表示小区为c载波为f以及所述BWP为b上的所述PUSCH信道的目标功率值,
表示小区为c载波为f的所述BWP为b上的所述PUSCH发送时机i上PUSCH占用的RB数量,μ是子载波间隔,PL
b,f,c(q
d)表示小区为c载波为f以及所述BWP为b上的路径损耗,α
b,f,c(j)表示小区为c载波为f以及BWP为b上的路径损耗补偿因子,Δ
TF,b,f,c(i)表示对不同的传输格式的补偿,f
b,f,c(i,l)表示小区为c载波为f的上行激活部分带宽。
基于同一发明构思,本申请实施例还提供一种通信装置,该通信装置可以具有如图5所示的结构,且具有上述方法实施例中网络设备的行为功能。如图5所示,该装置500可包括通信单元501以及处理单元502,下面对各单元进行具体的介绍。
通信单元501,用于向终端设备发送多个参考信号的配置信息;向所述终端设备发送第一指示信息,所述第一指示信息用于指示所述多个参考信号中的至少两个参考信号,所述至少两个参考信号用于确定所述第一上行传输的发送功率。
一种可能的设计中,所述第一指示信息为第一下行控制信息DCI的第一字段,所述第一DCI用于指示所述终端设备调度第一上行传输;或者
所述第一指示信息通过无线资源控制RRC信令携带。
一种可能的设计中,处理单元502,用于确定所述多个参考信号中的所述至少两个参考信号;根据参考信号索引与SRI域值的映射关系,确定与所述至少两个参考信号对应的第一字段的第一字段域值。
一种可能的设计中,通过所述通信单元502向所述终端设备发送所述参考信号索引与SRI域值的映射关系。
一种可能的设计中,所述通信单元501还用于:向所述终端设备发送所述多个参考信号对应的多个服务小区的信息,其中,所述多个服务小区的信息和所述多个参考信号的配置信息在同一个RRC信令中发送给所述终端设备。
此外,本申请实施例还提供一种通信设备,该通信设备可以具有如图6所示的结构,所述通信设备可以是终端设备,也可以是能够支持终端设备实现上述方法的芯片或芯片系统。如图6所示的通信设备600可以包括至少一个处理器602,所述至少一个处理器602用于与存储器耦合,读取并执行所述存储器中的指令以实现本申请实施例提供的方法中终端设备涉及的步骤。可选的,该装置600还可以包括收发器601,用于支持装置600进行信令或者数据的接收或发送。装置600中的收发器601,可用于实现上述收发单元501所具有的功能,例如,收发器601可用于装置600执行如图3所示的通信方法中的S301和 S302、S305或者S401和S402、S405所示步骤,处理器602可用于实现上述处理单元502所具有的功能,例如,处理器602可用于装置600执行如图3所示的通信方法中的S303-S304,或者S403-S404所示步骤。此外,收发器601可与天线603耦合,用于支持装置600进行通信。可选的,装置600还可以包括存储器604,其中存储有计算机程序、指令,存储器604可以与处理器602和/或收发器601耦合,用于支持处理器602调用存储器604中的计算机程序、指令以实现本申请实施例提供的方法中终端设备涉及的步骤;另外,存储器604还可以用于存储本申请方法实施例所涉及的数据,例如,用于存储支持收发器601实现交互所必须的数据、指令,和/或,用于存储装置600执行本申请实施例所述方法所必须的配置信息。
本申请实施例还提供一种通信设备,该通信设备可以具有如图7所示的结构,所述通信设备可以是网络设备,也可以是能够支持终端设备实现上述方法的芯片或芯片系统。如图7所示的通信设备700可以包括至少一个处理器702,所述至少一个处理器702用于与存储器耦合,读取并执行所述存储器中的指令以实现本申请实施例提供的方法中终端设备涉及的步骤。可选的,该装置700还可以包括收发器701,用于支持装置700进行信令或者数据的接收或发送。装置700中的收发器701,可用于实现上述通信单元501所具有的功能,例如,收发器701可用于装置700执行如图3所示的通信方法中的S301和S302、S305或者S401和S402、S405所示步骤,处理器702可用于实现上述处理单元502所具有的功能,例如,处理器702可用于装置700执行如图3所示的通信方法中的S303-S304,或者S403-S404所示步骤。此外,收发器701可与天线703耦合,用于支持装置700进行通信。可选的,装置700还可以包括存储器704,其中存储有计算机程序、指令,存储器704可以与处理器702和/或收发器701耦合,用于支持处理器702调用存储器704中的计算机程序、指令以实现本申请实施例提供的方法中终端设备涉及的步骤;另外,存储器704还可以用于存储本申请方法实施例所涉及的数据,例如,用于存储支持收发器701实现交互所必须的数据、指令,和/或,用于存储装置700执行本申请实施例所述方法所必须的配置信息。
基于与上述方法实施例相同构思,本申请实施例还提供了一种计算机可读存储介质,其上存储有一些指令,这些指令被计算机调用执行时,可以使得计算机完成上述方法实施例、方法实施例的任意一种可能的设计中所涉及的方法。本申请实施例中,对计算机可读存储介质不做限定,例如,可以是RAM(random-access memory,随机存取存储器)、ROM(read-only memory,只读存储器)等。
基于与上述方法实施例相同构思,本申请还提供一种计算机程序产品,该计算机程序产品在被计算机调用执行时可以完成方法实施例以及上述方法实施例任意可能的设计中所涉及的方法。
基于与上述方法实施例相同构思,本申请还提供一种芯片,该芯片可以包括处理器以及接口电路,用于完成上述方法实施例、方法实施例的任意一种可能的实现方式中所涉及的方法,其中,“耦合”是指两个部件彼此直接或间接地结合,这种结合可以是固定的或可移动性的,这种结合可以允许流动液、电、电信号或其它类型信号在两个部件之间进行通信。
综上所述,本申请实施例提供了一种通信方法,该通信方法可以用于确定上行传输的发送功率,或者用于实现上行传输。该方法中,网络设备为一个物理上行共享信道PUSCH 传输配置多个路损参考信号,所述终端设备可以根据所述多个路损参考信号,测量得到的下行路径损耗值,进而所述终端设备根据所述下行路径损耗值,确定上行传输功率。其中,所述路损参考信号可以由不同网络设备所配置的,还可以为不同网络设备将参考信号配置信息统一发送给其中一个网络设备,由该网络设备发送给所述终端设备,因此,所述方法通过不同路损参考信号协同测量获得路径传输质量,并确定上行传输的发射功率,使用该上行传输的发射功率进行上行传输,从而降低不同终端设备之间的干扰,保证了网络设备管理小区边缘终端设备的使用性能。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到本申请实施例可以用硬件实现,或固件实现,或它们的组合方式来实现。当使用软件实现时,可以将上述功能存储在计算机可读介质中或作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质,其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于:计算机可读介质可以包括RAM、ROM、电可擦可编程只读存储器(electrically erasable programmable read only memory,EEPROM)、只读光盘(compact disc read-Only memory,CD-ROM)或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。此外。任何连接可以适当的成为计算机可读介质。例如,如果软件是使用同轴电缆、光纤光缆、双绞线、数字用户线(digital subscriber line,DSL)或者诸如红外线、无线电和微波之类的无线技术从网站、服务器或者其他远程源传输的,那么同轴电缆、光纤光缆、双绞线、DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影中。如本申请实施例所使用的,盘(disk)和碟(disc)包括压缩光碟(compact disc,CD)、激光碟、光碟、数字通用光碟(digital video disc,DVD)、软盘和蓝光光碟,其中盘通常磁性的复制数据,而碟则用激光来光学的复制数据。上面的组合也应当包括在计算机可读介质的保护范围之内。
总之,以上所述仅为本申请的实施例而已,并非用于限定本申请的保护范围。凡根据本申请的揭露,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。
Claims (28)
- 一种通信方法,其特征在于,包括:终端设备根据多个参考信号中的至少两个参考信号,确定路径损耗参数,其中,所述终端设备被配置有所述多个参考信号;所述终端设备根据所述路径损耗参数,确定第一发射功率;所述终端设备根据所述第一发射功率发送第一上行传输。
- 如权利要求1所述的方法,其特征在于,所述终端设备根据多个参考信号中的至少两个参考信号,确定路径损耗参数,包括:所述终端设备根据所述至少两个参考信号,获得至少两个第一参数,所述至少两个参考信号中的每一个参考信号对应一个第一参数;所述终端设备根据所述至少两个第一参数,确定所述路径损耗参数;其中,所述第一参数为以下中的一个:下行路损估计值,下行路损估计值的线性值,下行路损估计值的对数值,高层滤波的测量值。
- 如权利要求1所述的方法,其特征在于,所述终端设备根据所述多个参考信号中的至少两个参考信号,确定路径损耗参数,包括:所述终端设备根据所述至少两个参考信号,获得一个第一参数;所述终端设备根据所述第一参数,确定所述路径损耗参数;所述第一参数为以下中的一个:下行路损估计值,下行路损估计值的线性值,下行路损估计值的对数值,高层滤波的测量值。
- 如权利要求1-3任一项所述的方法,其特征在于,所述方法还包括:所述终端设备确定所述多个参考信号中至少两个参考信号;其中,所述终端设备确定所述多个参考信号中至少两个参考信号,包括:所述终端设备获取第一下行控制信息DCI,所述第一DCI用于调度所述第一上行传输;所述终端设备根据所述第一DCI,确定所述多个参考信号中至少两个参考信号。
- 如权利要求4所述的方法,其特征在于,所述终端设备根据所述第一DCI,确定所述多个参考信号中至少两个参考信号,包括:所述终端设备根据参考信号索引与第一字段域值的映射关系,确定与所述第一DCI中的第一字段指示的第一字段域值对应的至少两个参考信号索引值。
- 如权利要求2所述的方法,其特征在于,所述路径损耗参数,满足以下公式:PL b,f,c=10log 10(delta1·PL#1+delta2·PL#2)其中,所述至少两个参考信号包括第一参考信号和第二参考信号,PL#1表示所述第一参考信号对应的所述第一下行路损估计值,PL#2表示第二参考信号对应的所述第二下行路损估计值,delta1为网络设备配置给所述终端设备的参数或者为大于0且小于等于1的常数,delta2为所述网络设备配置给所述终端设备的参数或者为大于0且小于等于1的常数。
- 如权利要求1所述的方法,其特征在于,所述第一发射功率,满足以下公式:其中,b是物理共享信道PUSCH传输所占的部分带宽BWP,f是所述PUSCH传输所占的载波,c是该载波所在的服务小区,i是发送时机,j是所述PUSCH的调度方式,q d是参考信号资源索引,l是功控调整状态索引,P PUSCH,b,f,c(i,j,q d,l)表示所述终端设备在小区为c载波为f以及所述BWP为b上发送所述PUSCH信道的发射功率,P CMAX,f,c(i)表示所述终端设备在小区为c载波为f上的最大发射功率,P O_PUSCH,b,f,c(j)表示小区为c载波为f以及所述BWP为b上的所述PUSCH信道的目标功率值, 表示小区为c载波为f的所述BWP为b上的所述PUSCH发送时机i上PUSCH占用的RB数量,μ是子载波间隔,PL b,f,c(q d)表示小区为c载波为f以及所述BWP为b上的路径损耗,α b,f,c(j)表示小区为c载波为f以及BWP为b上的路径损耗补偿因子,Δ TF,b,f,c(i)表示对不同的传输格式的补偿,f b,f,c(i,l)表示小区为c载波为f的上行激活部分带宽。
- 一种通信方法,其特征在于,包括:所述网络设备向终端设备发送多个参考信号的配置信息;所述网络设备向所述终端设备发送第一指示信息,所述第一指示信息用于指示所述多个参考信号中的至少两个参考信号,所述至少两个参考信号用于确定所述第一上行传输的发送功率。
- 如权利要求9所述的方法,其特征在于,所述第一指示信息为第一下行控制信息DCI的第一字段,所述第一DCI用于指示所述终端设备调度第一上行传输;或者所述第指示信息通过无线资源控制RRC信令携带。
- 如权利要求9或10所述的方法,其特征在于,所述方法还包括:所述网络设备确定所述多个参考信号中的所述至少两个参考信号;所述网络设备根据参考信号索引与第一字段域值的映射关系,确定与所述至少两个参考信号对应的第一字段的第一域值。
- 如权利要求11所述的方法,其特征在于,所述方法还包括:所述网络设备向所述终端设备发送所述参考信号索引与第一字段域值的映射关系。
- 如权利要求9-12任一项所述的方法,其特征在于,还包括:所述网络设备向所述终端设备发送所述多个参考信号对应的多个服务小区的信息,其中,所述多个服务小区的信息和所述多个参考信号的配置信息在同一个RRC信令中发送给所述终端设备。
- 一种通信装置,其特征在于,包括:处理单元,用于根据多个参考信号中的至少两个参考信号,确定路径损耗参数,其中,所述终端设备被配置有所述多个参考信号;所述处理单元,还用于根据所述路径损耗参数,确定第一发射功率;通信单元,用于根据所述第一发射功率发送第一上行传输。
- 如权利要求14所述的装置,其特征在于,所述处理单元在根据多个参考信号中 的至少两个参考信号,确定路径损耗参数时,具体用于:根据所述至少两个参考信号,通过所述通信单元获得至少两个第一参数,所述至少两个参考信号中的每一个参考信号对应一个第一参数;根据所述至少两个第一参数,确定所述路径损耗参数;其中,所述第一参数为以下中的一个:下行路损估计值,下行路损估计值的线性值,下行路损估计值的对数值,高层滤波的测量值。
- 如权利要求14所述的装置,其特征在于,所述处理单元在根据所述多个参考信号中的至少两个参考信号,确定路径损耗参数时,具体用于:所述终端设备根据所述至少两个参考信号,获得一个第一参数;根据所述第一参数,确定所述路径损耗参数;所述第一参数为以下中的一个:下行路损估计值,下行路损估计值的线性值,下行路损估计值的对数值,高层滤波的测量值。
- 如权利要求14-16任一项所述的装置,其特征在于,所述处理单元还用于:确定所述多个参考信号中至少两个参考信号;其中,所述处理单元在确定所述多个参考信号中至少两个参考信号时,具体用于:通过所述通信单元获取第一下行控制信息DCI,所述第一DCI用于调度所述第一上行传输;根据所述第一DCI,确定所述多个参考信号中至少两个参考信号。
- 如权利要求17所述的装置,其特征在于,所述处理单元在根据所述第一DCI,确定所述多个参考信号中至少两个参考信号时,具体用于:根据参考信号索引与SRI域值的映射关系,确定与所述第一DCI中的第一字段指示的第一字段域值对应的至少两个参考信号索引值。
- 如权利要求15所述的方法,其特征在于,所述路径损耗参数,满足以下公式:PL b,f,c=10log 10(delta1·PL#1+delta2·PL#2)其中,所述至少两个参考信号包括第一参考信号和第二参考信号,PL#1表示所述第一参考信号对应的所述第一下行路损估计值,PL#2表示第二参考信号对应的所述第二下行路损估计值,delta1为网络设备配置给所述终端设备的参数或者为大于0且小于等于1的常数,delta2为所述网络设备配置给所述终端设备的参数或者为大于0且小于等于1的常数。
- 如权利要求14所述的装置,其特征在于,所述第一发射功率,满足以下公式:其中,b是物理共享信道PUSCH传输所占的部分带宽BWP,f是所述PUSCH传输 所占的载波,c是该载波所在的服务小区,i是发送时机,j是所述PUSCH的调度方式,q d是参考信号资源索引,l是功控调整状态索引,P PUSCH,b,f,c(i,j,q d,l)表示所述终端设备在小区为c载波为f以及所述BWP为b上发送所述PUSCH信道的发射功率,P CMAX,f,c(i)表示所述终端设备在小区为c载波为f上的最大发射功率,P O_PUSCH,b,f,c(j)表示小区为c载波为f以及所述BWP为b上的所述PUSCH信道的目标功率值, 表示小区为c载波为f的所述BWP为b上的所述PUSCH发送时机i上PUSCH占用的RB数量,μ是子载波间隔,PL b,f,c(q d)表示小区为c载波为f以及所述BWP为b上的路径损耗,α b,f,c(j)表示小区为c载波为f以及BWP为b上的路径损耗补偿因子,Δ TF,b,f,c(i)表示对不同的传输格式的补偿,f b,f,c(i,l)表示小区为c载波为f的上行激活部分带宽。
- 一种通信装置,其特征在于,包括:通信单元,用于向终端设备发送多个参考信号的配置信息;向所述终端设备发送第一指示信息,所述第一指示信息用于指示所述多个参考信号中的至少两个参考信号,所述至少两个参考信号用于确定所述第一上行传输的发送功率。
- 如权利要求22所述的装置,其特征在于,所述第一指示信息为第一下行控制信息DCI的第一字段,所述第一DCI用于指示所述终端设备调度第一上行传输;或者所述第一指示信息通过无线资源控制RRC信令携带。
- 如权利要求22或23所述的装置,其特征在于,所述装置还包括:处理单元,用于确定所述多个参考信号中的所述至少两个参考信号;根据参考信号索引与SRI域值的映射关系,确定与所述至少两个参考信号对应的第一字段的第一域值。
- 如权利要求24所述的装置,其特征在于,所述处理单元还用于:通过所述通信单元向所述终端设备发送所述参考信号索引与第一字段域值的映射关系。
- 如权利要求22-25中任一项所述的装置,其特征在于,所述通信单元还用于:向所述终端设备发送所述多个参考信号对应的多个服务小区的信息,其中,所述多个服务小区的信息和所述多个参考信号的配置信息在同一个RRC信令中发送给所述终端设备。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储有计算机指令,当所述指令在计算机上运行时,使得计算机执行如权利要求1-13任一所述的方法。
- 一种计算机程序产品,其特征在于,所述计算机程序产品在被计算机调用时,使得计算机执行如权利要求1-13任一所述的方法。
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CN103891161A (zh) * | 2011-10-19 | 2014-06-25 | 三星电子株式会社 | 无线通信系统中的上行链路控制方法和装置 |
CN104094646A (zh) * | 2012-02-01 | 2014-10-08 | 摩托罗拉移动有限责任公司 | 协调多点无线通信系统中的上行链路功率控制 |
WO2019095396A1 (zh) * | 2017-11-20 | 2019-05-23 | 华为技术有限公司 | 一种数据传输节点确定方法和装置 |
CN110972251A (zh) * | 2018-09-28 | 2020-04-07 | 华为技术有限公司 | 信号传输方法、相关设备及系统 |
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