WO2022155824A1 - Procédé de transmission de signal de référence et appareil de communication - Google Patents

Procédé de transmission de signal de référence et appareil de communication Download PDF

Info

Publication number
WO2022155824A1
WO2022155824A1 PCT/CN2021/072949 CN2021072949W WO2022155824A1 WO 2022155824 A1 WO2022155824 A1 WO 2022155824A1 CN 2021072949 W CN2021072949 W CN 2021072949W WO 2022155824 A1 WO2022155824 A1 WO 2022155824A1
Authority
WO
WIPO (PCT)
Prior art keywords
time
reference signal
configuration
dmrs
zero
Prior art date
Application number
PCT/CN2021/072949
Other languages
English (en)
Chinese (zh)
Inventor
李怡然
余健
郭志恒
邵家枫
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2021/072949 priority Critical patent/WO2022155824A1/fr
Priority to CN202180088676.9A priority patent/CN116724580A/zh
Publication of WO2022155824A1 publication Critical patent/WO2022155824A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning

Definitions

  • the present application relates to the field of communication, and more particularly, to a method and a communication device for transmitting a reference signal.
  • the network device when the network device performs uplink scheduling, it can send downlink control information (DCI) in the downlink time unit to indicate the time-frequency resource allocation, modulation, coding and other information of the terminal device during uplink transmission.
  • DCI downlink control information
  • the network device when it performs uplink scheduling, it can send downlink control information (DCI) in the downlink time unit to indicate the time-frequency resource allocation, modulation, coding and other information of the terminal device during uplink transmission.
  • DCI downlink control information
  • the network device when the network device performs uplink scheduling, it can send downlink control information (DCI) in the downlink time unit to indicate the time-frequency resource allocation, modulation, coding and other information of the terminal device during uplink transmission.
  • the DCI respectively instructs the scheduling information transmitted by the terminal equipment in each uplink time unit in each uplink time unit, the overhead of the DCI will be too large, and the utilization rate of the physical downlink resources will be low.
  • the present application provides a reference signal transmission method and communication device, which can enable terminal equipment to flexibly configure zero-power uplink reference signals and DMRS in at least two time units, which is beneficial to reduce the overhead of physical resources.
  • a method for transmitting a reference signal is provided, and the execution body of the method may be a terminal device or a chip applied in the terminal device.
  • the following description takes the execution subject being a terminal device as an example. Including: the terminal device determines a first configuration, the first configuration is whether the zero-power uplink reference signal and/or the demodulation reference signal DMRS are included in at least two time units; The zero-power uplink reference signal and/or the DMRS are sent to the first network device in a time unit, where the zero-power uplink reference signal is used for interference measurement.
  • the signal transmission power on the time-frequency resource where the zero-power uplink reference signal is located is zero, that is, the terminal device does not transmit any signal on the time-frequency resource corresponding to the zero-power uplink reference signal.
  • the first network device can perform interference measurement on the time unit including the zero-power uplink reference signal.
  • the first network device can perform interference measurement on the time-frequency resource corresponding to the zero-power uplink reference signal.
  • the zero-power uplink reference signal may also have other names, which are not limited in this application.
  • the terminal device and the first network device respectively determine the first configuration, so as to determine whether to send the zero-power uplink reference signal and/or DMRS in at least two time units, which enables the terminal device
  • the flexible configuration of the zero-power uplink reference signal and the DMRS in at least two time units is beneficial to reduce the overhead of physical resources.
  • determining the first configuration by the terminal device includes: determining, by the terminal device, the first configuration according to first indication information of the first network device, and the first indication The information is used to indicate whether the terminal device sends the zero-power uplink reference signal and/or DMRS in at least two time units; or, the terminal device determines the first configuration according to the first sending rule agreed in the protocol.
  • the first indication information is carried in DCI.
  • an indication field is configured in the DCI, and the indication field is used to indicate whether the above-mentioned zero-power uplink reference signal and/or DMRS are sent in the above-mentioned at least two time units.
  • the above indication field may be one or more available fields configured for DCI in an existing protocol, one or more reserved fields configured for DCI in an existing protocol, or one or more fields that are not defined for DCI in an existing protocol. Multiple newly added fields are not limited in this embodiment of the present application.
  • the first sending rule includes at least one of the following: the at least two time units include at least one first time unit, and the first time unit is in the first frame The structure is an uplink time unit, and in the second frame structure, it is a downlink time unit, and the above-mentioned first configuration is: the at least one first time unit includes a zero-power uplink reference signal and a DMRS; or, the at least two time units include At least one second time unit, and the second time unit is an uplink time unit in the first frame structure, and is a downlink time unit in the second frame structure, and the above-mentioned first configuration is: the at least one second time unit includes: The zero-power uplink reference signal does not include DMRS; or, the at least two time units include at least one third time unit, and the third time unit is an uplink time unit in the first frame structure and the second frame structure,
  • the above-mentioned first configuration is: the at least one third time unit does not include
  • the terminal equipment in the second time unit may not send DMRS signals, and the receiving end may use the DMRS of the first time unit to perform channel estimation.
  • the terminal device may acquire the frame structures of the first network device and the second network device in advance.
  • the terminal device may receive network information or system information of the first network device and the second network device, so as to determine the frame structure of the two network devices.
  • the terminal device and the first network device are enabled to flexibly configure a time unit for sending zero-power reference signals and DMRS, that is, flexible configuration for interference measurement and channel
  • the estimated physical resources on the basis of ensuring lower DCI overhead, can flexibly reduce the overhead of physical resources used for interference measurement and channel estimation according to actual conditions, and improve uplink throughput.
  • the method further includes: the terminal device determines a second configuration, where the second configuration is the time-frequency resource occupied by the zero-power uplink reference signal and/or the DMRS;
  • the terminal device sends the zero-power uplink reference signal and/or the DMRS to the first network device in the at least two time units based on the first configuration, including: the terminal device, based on the second configuration, sends the time-frequency resource sending the above zero-power uplink reference signal and/or DMRS to the first network device.
  • the terminal device and the first network device can flexibly configure the time-frequency resources occupied by the zero-power uplink reference signal and/or the DMRS, which is beneficial for the first network device to measure the time-frequency resources at different time-frequency resource locations.
  • the interference is beneficial to reduce resource collision and avoid continuous strong interference to the DMRS signal used for channel estimation, thereby improving the accuracy of channel estimation.
  • determining the second configuration by the terminal device includes: the terminal device determines the above-mentioned second configuration according to the second indication information of the first network device, and the second indication information Used to indicate the time-frequency resource pattern occupied by the above-mentioned zero-power uplink reference signal and/or DMRS, the time-frequency resource pattern belongs to a time-frequency resource pattern set, and the time-frequency resource pattern set is predefined by the protocol or the first network.
  • the device indicates to the terminal device through signaling.
  • the time-frequency resource pattern set may be configured by the first network device for the terminal device through radio resource control (radio resource control, RRC) signaling, which is not limited in this embodiment of the present application.
  • radio resource control radio resource control
  • determining the second configuration by the terminal device includes: the terminal device determines the above-mentioned second configuration according to second indication information of the first network device, and the two indication information is used for Indicates the index of the above DMRS in a DMRS code division multiplexing (CDM) packet.
  • CDM code division multiplexing
  • the foregoing second indication information and the foregoing first indication information may be indicated by different fields in one DCI, or may be indicated by two DCIs, which are not limited in this embodiment of the present application.
  • the above-mentioned DMRS corresponds to the first time-frequency resource in the first DMRS CDM group
  • the first DMRS CDM group is the DMRS CDM group corresponding to the CDM configuration type of the above-mentioned DMRS
  • the above-mentioned zero-power uplink reference signal is a second time-frequency resource
  • the second time-frequency resource is a time-frequency resource other than the first time-frequency resource in the time-frequency resource where the first DMRS CDM group is located.
  • determining the second configuration by the terminal device includes: determining the second configuration by the terminal device according to a second sending rule agreed in the protocol, where the second sending rule includes: There is an association relationship between the index of the time-frequency resource pattern of the zero-power uplink reference signal and the index of the time unit in the at least two time units.
  • association relationship may be expressed in the form of a formula or a function, and may also be expressed in the form of a text description, which is not limited in this application.
  • the relationship between the zero-power uplink reference signal and the index of the time unit may be predefined, and the terminal device may determine the zero-power time-frequency resource pattern on each time unit according to the scheduled time unit, Save signaling overhead.
  • the first network device may Instructing the terminal device whether to send a zero-power uplink reference signal or DMRS in each uplink time unit is beneficial to flexibly reduce the overhead of physical resources for interference measurement and channel estimation according to the actual situation.
  • the first network device can instruct the terminal device to flexibly configure the zero-power uplink reference signal and the time-frequency resource pattern of the DMRS in different time units.
  • a network device measures the interference of different time-frequency resource locations, and on the other hand, it is beneficial to reduce resource collision and avoid continuous strong interference of the DMRS used for channel estimation by the second network device.
  • the execution body of the method may be a network device or a chip applied in the network device.
  • the following description takes the execution subject being a network device as an example. Including: the first network device determines a first configuration, the first configuration is whether the zero-power uplink reference signal and/or the demodulation reference signal DMRS is included in at least two time units; the first network device receives the terminal device in the above at least two time units.
  • the zero-power uplink reference signal and/or the DMRS sent in time units, the zero-power uplink reference signal is used for interference measurement.
  • the method further includes: the first network device sends the first configuration to the terminal device according to the first configuration.
  • Indication information the first indication information is used to indicate whether the above-mentioned terminal device sends the above-mentioned zero-power uplink reference signal and/or DMRS in at least two time units; or, the first network device determines according to the first transmission rule agreed in the protocol The above-mentioned first configuration.
  • the first sending rule includes at least one of the following: the at least two time units include at least one first time unit, and the first time unit is in the first frame
  • the structure is an uplink time unit, and in the second frame structure, it is a downlink time unit
  • the above-mentioned first configuration is: the at least one first time unit includes a zero-power uplink reference signal and a DMRS; or, the at least two time units include At least one second time unit, and the second time unit is an uplink time unit in the first frame structure, and is a downlink time unit in the second frame structure
  • the above-mentioned first configuration is: the at least one second time unit includes: The zero-power uplink reference signal does not include DMRS; or, the at least two time units include at least one third time unit, and the third time unit is an uplink time unit in the first frame structure and the second frame structure,
  • the above-mentioned first configuration is: the at least one third time unit does not include
  • the method further includes: the above-mentioned first network device determines a second configuration, where the second configuration is the time occupied by the above-mentioned zero-power uplink reference signal and/or DMRS frequency resource; receiving, by the first network device, the zero-power uplink reference signal and/or DMRS sent by the terminal device on the at least two time units includes: the first network device receiving the time-frequency resource from the terminal device on the time-frequency resource. The sent zero-power uplink reference signal and/or DMRS.
  • the method further includes: the first network device sends second indication information to the terminal device according to the second configuration , the second indication information is used to indicate the time-frequency resource pattern occupied by the zero-power uplink reference signal and/or the DMRS, the time-frequency resource pattern belongs to a time-frequency resource pattern set, and the time-frequency resource pattern set is a protocol preset defined or configured by the first network device for the terminal device.
  • the method further includes: the first network device sends second indication information to the terminal device according to the second configuration , and the second indication information is used to indicate the index of the CDM group in the DMRS code division multiplexing of the DMRS.
  • the above-mentioned DMRS corresponds to the first time-frequency resource in the first DMRS CDM group
  • the first DMRS CDM group is the DMRS CDM group corresponding to the CDM configuration type of the above-mentioned DMRS
  • the above-mentioned zero-power uplink reference signal is a second time-frequency resource
  • the second time-frequency resource is a time-frequency resource other than the first time-frequency resource in the time-frequency resource where the first DMRS CDM group is located.
  • determining the second configuration by the first network device includes: the first network device determines the second configuration according to a second sending rule agreed in the protocol, and the second configuration is determined by the first network device.
  • the sending rule includes: there is an association relationship between the index of the time-frequency resource pattern of the zero-power uplink reference signal and the index of the time unit in the at least two time units.
  • a communication apparatus including: a method for performing any one of the possible implementations of the above-mentioned first aspect.
  • the apparatus includes a module for executing the method in any one of the possible implementation manners of the first aspect above.
  • the communication device may include modules that perform one-to-one correspondence with the methods/operations/steps/actions described in the first aspect, and the modules may be hardware circuits, software, or hardware circuits. Combined with software implementation.
  • the communication device is a communication chip
  • the communication chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • the communication apparatus is a communication device, which may include a transmitter for transmitting information or data, and a receiver for receiving information or data.
  • the communication apparatus is configured to execute the method in the first aspect or any possible implementation manner of the first aspect, the communication apparatus may be configured in a terminal device, or the communication apparatus itself is the above-mentioned terminal device .
  • another communication apparatus including: a method for performing any one of the possible implementations of the second aspect.
  • the communication apparatus includes a module for executing the method in any of the possible implementation manners of the second aspect above.
  • the communication device may include modules corresponding to one-to-one execution of the methods/operations/steps/actions described in the second aspect, and the modules may be hardware circuits, software, or hardware circuits Combined with software implementation.
  • the communication device is a communication chip
  • the communication chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • the communication apparatus is a communication device, which may include a transmitter for transmitting information or data, and a receiver for receiving information or data.
  • the communication apparatus is configured to execute the method in the second aspect or any possible implementation manner of the second aspect, and the communication apparatus may be configured in the first network device, or the apparatus itself is the above-mentioned first a network device.
  • a communication device including a processor and a memory, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the device executes any of the above-mentioned first aspects.
  • the processors are one or more and the memories are one or more.
  • the memory may be integrated with the processor, or the memory may be provided separately from the processor.
  • a communication device comprising, a processor, and a memory, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the device executes any of the above-mentioned second aspects.
  • the processors are one or more and the memories are one or more.
  • the memory may be integrated with the processor, or the memory may be provided separately from the processor.
  • the communication device further includes a transmitter (transmitter) and a receiver (receiver).
  • the transmitter and receiver can be set separately or integrated together, called a transceiver (transceiver).
  • a computer program product comprising: a computer program (also referred to as code, or instructions), which, when the computer program is executed, causes a computer to execute any one of the above aspects.
  • a computer program also referred to as code, or instructions
  • a computer-readable storage medium stores a computer program (which may also be referred to as code, or instructions), when it runs on a computer, causing the computer to perform any of the above-mentioned aspects. method in any of the possible implementations.
  • a communication system including a device for implementing the above-mentioned first aspect or any possible implementation method of the first aspect, and a device for implementing any of the above-mentioned second aspect or the second aspect Apparatus for possible implementation of the method.
  • the communication system may further include other devices that interact with the terminal device and/or the first network device in the solutions provided in the embodiments of the present application.
  • another communication system including at least one of the above-mentioned terminal equipment and at least one of the above-mentioned first network equipment.
  • the communication system may further include at least one of the above-mentioned second network devices.
  • FIG. 1 is a schematic diagram of a communication system to which an embodiment of the present application is applicable;
  • FIG. 2 is a schematic diagram of a possible frame structure adopted in an embodiment of the present application.
  • FIG. 3 is a schematic diagram of another communication system to which an embodiment of the present application is applied
  • FIG. 4 is a schematic diagram of a possible time unit relationship provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a method for transmitting a reference signal provided by an embodiment of the present application
  • FIG. 6 is a schematic diagram of an indication field carrying first indication information provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another indication field carrying first indication information provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a time-frequency resource pattern set provided by an embodiment of the present application.
  • Fig. 9 is the schematic diagram of 6 kinds of configurations of DMRS CDM grouping provided by the embodiment of the present application.
  • FIG. 10 is a schematic diagram of another communication system provided by an embodiment of the present application.
  • Fig. 11 is the schematic diagram of the DMRS pattern of the embodiment of the present application.
  • FIG. 12 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • FIG. 14 is a schematic block diagram of still another communication apparatus provided by an embodiment of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • 5G 5th generation
  • NR new radio
  • the terminal equipment in the embodiments of the present application may also be referred to as: user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), access terminal, subscriber unit, subscriber station, Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user equipment, etc.
  • user equipment user equipment
  • MS mobile station
  • MT mobile terminal
  • access terminal subscriber unit, subscriber station, Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user equipment, etc.
  • the terminal device may be a device that provides voice/data connectivity to the user, such as a handheld device with a wireless connection function, a vehicle-mounted device, and the like.
  • some examples of terminal devices include: mobile phone (mobile phone), tablet computer, notebook computer, PDA, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented Augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, smart grid wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol protocol, SIP) telephone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), wireless communication-capable handheld device, computing device or other processing device connected to a wireless modem
  • Vehicle-mounted devices, wearable devices, terminal devices in 5G networks, or terminal devices in the future evolved public land mobile network (PLMN), etc. are not limited in this application.
  • the terminal device may be a terminal device in an internet of things (Internet of things, IoT) system.
  • IoT internet of things
  • the Internet of Things is an important part of the future development of information technology. Its main technical feature is to connect items to the network through communication technology, so as to realize the intelligent network of human-machine interconnection and interconnection of things.
  • the terminal device in this embodiment of the present application may be a wearable device.
  • Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that can be worn directly on the body or integrated into the user's clothing or accessories.
  • Wearable devices are not only a hardware device, but also can achieve powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • the terminal device may also be a terminal device in machine type communication (machine type communication, MTC).
  • the terminal device may also be an in-vehicle module, an in-vehicle module, an in-vehicle component, an in-vehicle chip or an in-vehicle unit built into the vehicle as one or more components or units.
  • Vehicle components, vehicle chips or vehicle units, etc. can implement the method provided in this application.
  • V2X vehicle-to-everything
  • LTE-V long-term evolution-vehicle
  • V2X vehicle-to-vehicle
  • V2V vehicle-to-vehicle
  • the network device involved in this application may be a device that communicates with a terminal device.
  • the network device may also be referred to as an access network device or a wireless access network device. It may be a transmission reception point (TRP), or a
  • the evolved base station (evolved NodeB, eNB or eNodeB) in the LTE system may also be a home base station (for example, home evolved NodeB, or home Node B, HNB), a base band unit (base band unit, BBU), or a cloud A wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, an in-vehicle device, a wearable device, a network device in a 5G network, or a future evolved PLMN network It can also be an access point (AP) in a WLAN, or a gNB in an NR system.
  • the above network equipment can also be a city base station, a micro base station, a pico base station
  • the network device may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a radio access network (radio access network) including a CU node and a DU node, RAN) device, or a RAN device including a control plane CU node (CU-CP node), a user plane CU node (CU-UP node) and a DU node.
  • CU-CP node control plane CU node
  • CU-UP node user plane CU node
  • the network equipment provides services for the cell, and the terminal equipment communicates with the cell through transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the network equipment, and the cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.) , can also belong to the base station corresponding to the small cell, where the small cell can include: urban cell (metro cell), micro cell (micro cell), pico cell (pico cell), femto cell (femto cell), etc. , these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • a macro base station for example, a macro eNB or a macro gNB, etc.
  • the small cell can include: urban cell (metro cell), micro cell (micro cell), pico cell (pico cell), femto cell (femto cell), etc.
  • these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission
  • FIG. 1 is a schematic diagram of a communication system to which an embodiment of the present application is applied.
  • the communication system 100 includes a first network device 110 , a second network device 120 and a terminal device 130 .
  • the terminal device 130 is within the common coverage area of the first network device 110 and the second network device 120. Therefore, the first network device 110 and the terminal device 130 can communicate through a wireless connection, and the second network device 120 and the terminal device 130 can also communicate Communicate via wireless connection.
  • communication can be divided into different types.
  • sending information from a network device to a terminal device is called downlink (downlink, DL) communication or downlink transmission
  • sending information from a terminal device to a network device is called uplink (uplink, UL) communication or uplink transmission.
  • the first network device 110 can send information to the terminal device 130 for downlink communication (the information can also be referred to as downlink information); the terminal device 130 can send information to the first network device 110 for uplink communication (the information can also be referred to as downlink information).
  • the second network device 120 may send information to the terminal device 130 for downlink communication (the information may also be referred to as downlink information); the terminal device 130 may send information to the second network device 120 for uplink communication (This information may also be simply referred to as uplink information).
  • the first network device 110 in FIG. 1 is a micro base station
  • the second network device 120 is a macro base station.
  • FIG. 1 is only a simplified schematic diagram for easy understanding, and the communication system 100 may also include other numbers of network devices or terminal devices, or other types of devices, which are not limited in this embodiment of the present application. .
  • FIG. 2 shows a schematic diagram of a possible frame structure adopted by the embodiment of the present application.
  • D represents the downlink time unit
  • U represents the uplink time unit
  • S represents the uplink and downlink mixed time unit (that is, S can be either a time unit used for uplink transmission or a time unit used for downlink transmission. time unit), S time unit can also be called flexible time unit.
  • the first frame structure is DSUUU
  • the second frame structure is DDDSU.
  • the first network device 110 in FIG. 1 uses the first frame structure to transmit information with the terminal device 130
  • the second network device 120 uses the second frame structure to transmit information to the terminal device 130
  • FIG. 1 and FIG. 2 As shown, when the first network device 110 and the terminal device 130 perform uplink transmission (U), while the second network device 120 and the terminal device 130 perform downlink transmission (D or S), the first network device 110 receives the data from the The uplink information of the terminal device 130 will alias the downlink information sent by the second network device 120 to the terminal device 130 , and the downlink information sent by the second network device 120 to the terminal device 130 will be different from the downlink information received by the first network device 110 from the terminal device 130 .
  • U uplink transmission
  • D or S downlink transmission
  • the uplink information is interference information, and the interference information may cause the uplink information of the terminal device 130 to be unable to be accurately demodulated.
  • the downlink data sent by the second network device 120 to the terminal device 130 will cause interference to the uplink data sent by the terminal device 130 to the first network device 110 , that is, the second network device 120 will cause the first network device 110 to suffer. interference. Therefore, the first network device 110 needs to measure the interference of the second network device 120, so as to suppress the interference according to the measurement result, so as to solve the interference problem and better demodulate the uplink information from the terminal device 130.
  • the terminal device 330 and the network device 310 perform uplink transmission
  • the terminal device 340 and the network device 320 perform uplink transmission
  • the network device 310 may also receive the uplink signal sent from the terminal device 340 to the network device 320, so that the network device 310 cannot accurately demodulate the uplink signal from the terminal device 330. Therefore, the uplink signal of the terminal device 340 will cause interference to the uplink signal of the terminal device 330, and interference measurement needs to be performed to solve the interference problem.
  • FIG. 3 is only a simplified schematic diagram for easy understanding, and the communication system 300 may also include other numbers of network devices or terminal devices, or other types of devices, which are not limited in this embodiment of the present application. .
  • the network device can send DCI in the downlink time unit, and the DCI indicates the time-frequency resource allocation, modulation, coding and other information of the terminal device during uplink transmission.
  • the DCI is carried on the physical downlink control channel (PDCCH).
  • PDCCH physical downlink control channel
  • a possible implementation is to use one DCI to schedule two or more time units, or use one DCI to schedule two or more time units frequency resource unit, thereby effectively reducing the signaling overhead of DCI in uplink scheduling.
  • TTI transmission time interval
  • This technology may also use other names, which are not limited in this embodiment of the present application.
  • the network device Under long TTI scheduling, in each time unit of uplink transmission in the prior art, the network device will use the DMRS at the same location to perform channel estimation.
  • the zero-power uplink reference signal When one DCI schedules one time unit, the zero-power uplink reference signal also adopts the same location distribution in different time units.
  • the DMRS time-frequency resources at the same location can only measure the interference at the fixed resource element (RE) location in different time units. If there is continuous strong interference, the DMRS at the fixed location may experience a certain degree of resource loss. Collision (that is, sustained strong interference on the same resource unit) leads to the degradation of channel estimation performance and affects the demodulation performance. Therefore, configuring the DMRS at the same position in each time unit cannot guarantee the performance of channel estimation, which affects the demodulation and decoding of data.
  • RE resource element
  • the present application provides a reference signal transmission method and communication device, which can enable terminal equipment to flexibly configure zero-power uplink reference signals and DMRS in at least two time units, which is beneficial to reduce the overhead of physical resources.
  • DMRS is a sequence known by the transceiver and mapped on time-frequency resources with known locations. It is used by the receiving end to demodulate and decode the received data.
  • the transmitting end uses the same precoding and antenna port as the uplink transmission signal to send the DMRS. Since the DMRS and the uplink transmission signal experience the same fading channel, the receiving end can Based on the known DMRS sequence, the equivalent fading channel experienced by the uplink signal transmission is estimated, and the uplink data demodulation is completed based on the estimated equivalent channel state information.
  • Downlink transmission is similar to uplink transmission, and details are not repeated here.
  • the zero-power uplink reference signal means that the transmit power of the transmitter on some time-frequency resources is zero, that is, the terminal device does not send any signal on the time-frequency resource corresponding to the zero-power uplink reference signal, and enables reception.
  • the terminal performs interference measurement based on the received zero-power uplink reference signal.
  • enabling the receiving end to obtain the interference channel state information when the terminal device has no transmission signal at the position of the time-frequency resource corresponding to the zero-power uplink reference signal is helpful for the receiving end to perform interference measurement.
  • the time-frequency resources occupied by the zero-power uplink reference signal may be referred to as muting resources.
  • the name of the zero-power uplink reference signal is only exemplary, and any description with the same function can be used as the zero-power uplink reference signal in this application, which is not limited in this application.
  • a time unit is a time domain unit used for data transmission, which may include a radio frame, a subframe, a slot, a mini-slot, or an orthogonal frequency division multiplexing (orthogonal) frequency division multiplexing, OFDM) symbols and other time domain units.
  • OFDM symbols may also be referred to as time-domain symbols, or may be referred to as symbols for short.
  • FIG. 4 is a schematic diagram of a possible time unit relationship provided by an embodiment of the present application. As shown in FIG. 4 , the time domain length of one radio frame is 10ms.
  • One radio frame may include 10 radio subframes, and the time domain length of one radio subframe is 1 ms.
  • a radio subframe may include one or more time slots, and how many time slots a subframe includes is related to the subcarrier spacing. For the case where the subcarrier space (SCS) is 15kHz, the time domain length of one time slot is 1ms. One slot includes 14 symbols.
  • the time unit may include one or more of time slots, frames, subframes, and symbols, and may also include other units representing the length of the time domain, which is not limited in this application.
  • indication may include direct indication and indirect indication, as well as explicit indication and implicit indication.
  • the information indicated by a certain information is called the information to be indicated, and in the specific implementation process, there can be many ways to indicate the information to be indicated.
  • the information to be indicated can be directly indicated, such as indicating the information to be indicated itself. Or the index of the information to be indicated, etc.
  • the information to be indicated may also be indirectly indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance.
  • the specific information can also be indicated by means of a pre-agreed (for example, protocol) arrangement order of various information.
  • the first, second, and various numeral numbers are only for the convenience of description, and are not used to limit the scope of the embodiments of the present application. For example, distinguish different information, distinguish different time units, etc.
  • the "protocols" involved in the embodiments of the present application may refer to standard protocols in the communication field, such as LTE protocols, NR protocols, and related protocols applied in future communication systems, which are not limited in this application.
  • “plurality” refers to two or more.
  • “And/or”, which describes the association relationship of the associated objects indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an “or” relationship.
  • “At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • At least one (a) of a, b and c may represent: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, wherein a, b, c can be single or multiple.
  • the method 500 can be applied to the communication system 100 shown in FIG. 1 and the communication system 300 shown in FIG. 3 , and can also be applied to other communication systems.
  • the first network device in the method 500 may be the first network device 110 shown in FIG. 1
  • the second network device may be the second network device 120 shown in FIG. 1
  • the terminal device may be The above-mentioned terminal device 130 in FIG. 1 .
  • the method 500 includes the following steps:
  • a terminal device determines a first configuration.
  • the first network device determines the first configuration.
  • the above-mentioned first configuration is whether the zero-power uplink reference signal and the demodulation reference signal DMRS are included in at least two time units.
  • the terminal device Based on the first configuration, the terminal device sends the zero-power uplink reference signal and/or the DMRS to the first network device in the at least two time units, where the zero-power uplink reference signal is used for interference measurement.
  • the first network device receives the zero-power uplink reference signal and/or the DMRS sent from the terminal device in at least two time units.
  • the resource units occupied by the above-mentioned DMRS may also be used for interference measurement on resource units where DMRS is not transmitted.
  • the terminal device and the first network device respectively determine the first configuration, so as to determine whether to send the DMRS and/or the zero-power uplink reference signal in at least two time units, which enables the terminal device Flexible configuration of DMRS and zero-power uplink reference signal on at least two time units is beneficial to reduce the physical resource overhead for interference measurement and channel estimation.
  • the above-mentioned first configuration may be determined through the DCI of the first network device, where the DCI indicates whether the zero-power uplink reference signal and/or the DMRS are included in the at least two time units.
  • the terminal device and the first network device are enabled to flexibly configure the time unit for sending the zero-power reference signal and the DMRS, that is, to flexibly configure the physical unit for interference measurement.
  • Resources and physical resources used for channel estimation can effectively reduce the overhead of interference measurement and physical resources used for channel estimation on the basis of ensuring lower DCI overhead, and improve uplink throughput.
  • the terminal device and the first network device may determine the foregoing first configuration through two possible implementation manners.
  • the terminal device may determine the first configuration according to the first indication information of the first network device.
  • the first indication information is used to indicate whether the terminal device sends the above-mentioned zero-power uplink reference signal and/or DMRS in at least two time units. This method enables the terminal device to flexibly configure the zero-power uplink reference signal and the DMRS in at least two time units.
  • the first indication information may be carried in DCI.
  • an indication field is configured in the DCI, and the indication field is used to indicate whether the above-mentioned zero-power uplink reference signal and/or DMRS are sent in the above-mentioned at least two time units.
  • the above indication field may be one or more available fields configured for DCI in an existing protocol, one or more reserved fields configured for DCI in an existing protocol, or one or more fields that are not defined for DCI in an existing protocol. Multiple newly added fields are not limited in this embodiment of the present application.
  • indication field may be indicated by other means such as a bitmap or a bit state, which is not limited in this application.
  • the first indication information is carried in an indication field
  • the indication field may include multiple sub-indication fields, each of the multiple sub-indication fields corresponds to a time unit, and each time unit is indicated separately,
  • the number of bits of the above indication field is equal to the number of bits of each sub-indication field * the number of time units under the long TTI scheduling, or the number of bits of the indication field may also be greater than the number of sub-indication fields The number of bits in the field * the number of time units under long TTI scheduling.
  • the above-mentioned indication field can also jointly indicate multiple consecutive time units, that is, each sub-indication field indicates multiple consecutive time units, so as to reduce the signaling overhead of the first indication information.
  • each sub-indication field The number of indicated time units is not limited. It should be understood that this embodiment of the present application also does not limit the number of bits of the above-mentioned indication field.
  • the first network device and the terminal device may determine the indication in the first indication information in a predefined manner or a pre-configured manner Correspondence between different bit values of the field and different meanings.
  • FIG. 6 is a schematic diagram of an indication field carrying first indication information provided by an embodiment of the present application.
  • Table 1 lists the correspondence between different bit values and different meanings of each sub-indication field in the first indication information. In Table 1, the current time is the time unit corresponding to a sub-indication field.
  • a sub-indication field Indicative meaning 00
  • the zero-power uplink reference signal and DMRS are not sent 01
  • only the zero-power uplink reference signal is sent 10
  • only DMRS is sent 11
  • both the zero-power uplink reference signal and the DMRS are sent
  • each sub-indication field independently indicates a time unit, and a zero-power uplink reference signal on each time unit can be added. and flexibility of DMRS configuration, but this is not limited in this embodiment of the present application.
  • FIG. 7 is a schematic diagram of an indication field carrying first indication information provided by an embodiment of the present application.
  • the transmission conditions of the zero-power uplink reference signal and DMRS in each two consecutive time units are determined by using 2 bits respectively. to instruct.
  • Table 2 lists the correspondence between different bit values and different meanings of each sub-indication field in the first indication information.
  • the first network device and the terminal device may determine the time unit of the above joint indication in a pre-defined manner or a pre-configured manner quantity.
  • the above-mentioned joint indication method can be applied to a scenario where the number of time units scheduled under long TTI scheduling is large.
  • the number of time units jointly indicated may also be other positive integers greater than 2, which is not limited in this application.
  • the terminal device and the first network device may determine the above-mentioned first configuration according to the sending rule agreed in the protocol. This method is beneficial to reduce the overhead of downlink control information.
  • the sending rule is referred to as a first sending rule.
  • the foregoing first sending rule may include at least one of the following:
  • the above-mentioned at least two time units include at least one first time unit, and the first time unit is an uplink time unit in the first frame structure, and is a downlink time unit in the second frame structure, and the above-mentioned first configuration is:
  • the at least one first time unit includes the zero-power uplink reference signal and the DMRS.
  • the above at least two time units include at least one second time unit, and the second time unit is an uplink time unit in the first frame structure, and is a downlink time unit in the second frame structure, and the above-mentioned first configuration
  • the steps are: the at least one second time unit includes the zero-power uplink reference signal and does not include the DMRS.
  • the above-mentioned at least two time units include at least one third time unit, and the third time unit is an uplink time unit in the first frame structure and the second frame structure, and the above-mentioned first configuration is: the at least one The third time unit does not include the above zero-power uplink reference signal.
  • the first frame structure is the frame structure used by the terminal device to communicate with the first network device
  • the second frame structure is the frame structure used by the terminal device to communicate with the second network device, that is, in the communication system at this time, for For terminal equipment, there may be signal transmissions in opposite directions on the same time unit.
  • the first frame structure and the second frame structure are the frame structures shown in FIG. 2 .
  • the above-mentioned second time unit is a subsequent time unit of the first time unit that is continuously scheduled. If the channel characteristics where the second time unit is located changes slowly, in order to reduce the DMRS overhead, the terminal equipment on the second time unit may not send For the DMRS signal, the receiving end may use the DMRS of the first time unit to perform channel estimation.
  • the terminal device may acquire the frame structures of the first network device and the second network device in advance.
  • the terminal device may determine the frame structures of the first network device and the second network device by receiving network information or system information of the two network devices.
  • the first configuration is to send the DMRS and the zero-power uplink reference signal in this time unit. If a time unit is in a different frame structure, and the transmitted signals are all uplink signals, the first configuration is to not send a zero-power uplink reference signal in this time unit. If a time unit is in different frame structures, and the transmitted signals include uplink signals and downlink signals, the first configuration is to send zero-power uplink reference signals in this time unit. If the time unit is the later time of continuous scheduling unit, no DMRS is sent on this time unit.
  • the first sending rule is described in detail below with reference to FIG. 1 and FIG. 2 , and Table 3 lists the first sending rule in different situations.
  • S is the time unit for downlink transmission.
  • the first network device schedules three consecutive time units: time unit #2, time unit #3, and time unit #4 through the long TTI scheduling technique. It can be seen from Table 3 that:
  • the frame structure of the second network device is downlink transmission, and the frame structure of the first network device is uplink transmission.
  • the terminal device sends the DMRS and the zero-power uplink reference signal in the time unit.
  • the terminal device may not send the DMRS signal, but since interference measurement needs to be performed, the terminal device sends the zero-power uplink reference signal in this time unit.
  • the second network device does not respond to the first network device. Interference is present and no interference measurement is required. Therefore, the terminal device may not send the zero-power uplink reference signal in this time unit, but whether to send the DMRS signal may be determined according to specific channel characteristics.
  • the terminal device and the first network device are enabled to flexibly configure a time unit for sending zero-power reference signals and DMRS, that is, flexible configuration for interference measurement and channel
  • the estimated physical resources on the basis of ensuring lower DCI overhead, can flexibly reduce the overhead of physical resources used for interference measurement and channel estimation according to actual conditions, and improve uplink throughput.
  • the method 500 further includes:
  • the terminal device and the first network device determine the second configuration.
  • the above-mentioned second configuration is the time-frequency resource occupied by the above-mentioned zero-power uplink reference signal and/or DMRS.
  • the terminal device sends a zero-power uplink reference signal and/or a DMRS to the first network device on the above-mentioned time-frequency resource.
  • the first network device receives the zero-power uplink reference signal and/or the DMRS from the terminal device on the above-mentioned time-frequency resource.
  • the reference signal transmission method enables the terminal device to flexibly configure the time-frequency resources occupied by the zero-power uplink reference signal and/or the DMRS, which is beneficial for the first network device to measure the time-frequency resources from the second network device at different time-frequency resource locations.
  • the interference of the network equipment is beneficial to reduce resource collision, avoid the DMRS signal used for channel estimation from being continuously and strongly interfered by the second network equipment, thereby improving the accuracy of the channel estimation.
  • the terminal device and the first network device may determine the foregoing second configuration through two possible implementation manners.
  • the terminal device may determine the second configuration according to the second indication information of the first network device.
  • the above-mentioned second indication information may be used to indicate the time-frequency resource pattern occupied by the above-mentioned zero-power uplink reference signal and/or the DMRS, and the above-mentioned time-frequency resource pattern includes the above-mentioned zero-power uplink reference signal and/or the above-mentioned occupied by the DMRS. location information of the time-frequency resources.
  • the second indication information directly indicates one of the available patterns. It should be understood that the multiple time-frequency resource patterns usable by the first network device and the terminal device may be regarded as a set of time-frequency resource patterns.
  • the second indication information can indicate the time-frequency resource pattern used by the terminal device for uplink transmission by indicating one time-frequency resource pattern in a time-frequency resource pattern set, because the available time-frequency resource pattern is divided into many There are time-frequency resource pattern sets, and the number of time-frequency resource patterns included in each time-frequency resource pattern set is smaller or far smaller than the number of usable time-frequency resource patterns. Therefore, the signaling overhead of the second indication information can be reduced .
  • the second indication information includes an indication field of a time-frequency resource pattern, and different state values of the indication field of the time-frequency resource pattern correspond to different time-frequency resources pattern.
  • the second indication information includes an indication field of a time-frequency resource pattern, and the indication field of the time-frequency resource pattern indicates the time-frequency resource pattern by means of a bitmap, that is, each time-frequency resource pattern in the indication field of the time-frequency resource pattern.
  • Each bit corresponds to one time-frequency resource pattern, and different values of each bit indicate whether the corresponding time-frequency resource pattern is available or unavailable.
  • the division manner may be predefined by the protocol or configured by the first network device for the terminal device.
  • the time-frequency resource pattern set may be indicated by the first network device to the terminal device through RRC signaling.
  • the foregoing second indication information and the foregoing first indication information may be indicated by different fields in one DCI, or may be indicated by two DCIs, which are not limited in this embodiment of the present application.
  • FIG. 8 shows a schematic diagram of a time-frequency resource pattern set provided by an embodiment of the present application. It should be understood that the set of time-frequency resource patterns shown in FIG. 8 includes multiple time-frequency resource patterns, and each time-frequency resource pattern indicates that under long TTI scheduling, the terminal device needs to send DMRS simultaneously in at least two time units and the zero-power uplink reference signal, the time-frequency resources occupied by the DMRS and the zero-power uplink reference signal.
  • the time-frequency resource pattern set includes 6 kinds of time-frequency resource patterns, and in order to distinguish each time-frequency resource pattern, an indication field of at least 3 bits is required to indicate. In each time unit, 3 bits are used to indicate the indices of different time-frequency resource patterns of the zero-power uplink reference signal.
  • the second indication information is 001000010, where 001 corresponds to transmission time unit #0, 000 time unit #1 and 010 time unit #2, then the terminal device is in time unit #0, time unit # Time-frequency resource patterns corresponding to index numbers 1, 0, and 2 are used on 1 and time unit #2 to send the zero-power uplink reference signal and the DMRS, respectively.
  • the foregoing second indication information may also be used to indicate an index of the foregoing DMRS in a DMRS code division multiplexing (code division multiplexing, CDM) grouping.
  • CDM code division multiplexing
  • the time-frequency resources occupied by the zero-power uplink reference signal are the time-frequency resources in the time-frequency resources of the DMRS CDM grouping except for the time-frequency resources of the DMRS.
  • FIG. 9 shows a schematic diagram of six configurations of a DMRS CDM group (group) provided by an embodiment of the present application. As shown in FIG. 9 , the six configurations correspond to six indices from 0 to 5, respectively. 3-bit indication information can be configured for each time unit to determine the index of the DMRS CDM group. If the DMRS CDM group index is 1, it means that the DMRS signal is sent on the time-frequency resources in the slashed area, and the zero-power uplink reference signal is sent on the time-frequency resources corresponding to other DMRS CDM groups.
  • the terminal device and the first network device may determine the second configuration according to the sending rule agreed in the protocol.
  • the sending rule includes: there is an association relationship between the index of the time-frequency resource pattern of the zero-power uplink reference signal and the index of the time unit in the at least two time units.
  • the sending rule is referred to as the second sending rule.
  • the above-mentioned association relationship may be predefined by the remainder function mod(i, K).
  • i represents the ith time unit in the long TTI scheduling
  • the first network device can instruct the terminal device whether to send zero-power in the current uplink time unit.
  • the uplink reference signal or DMRS is beneficial to flexibly reduce the overhead of physical resources for interference measurement and channel estimation according to the actual situation.
  • the first network device can instruct the terminal device to flexibly configure the zero-power uplink reference signal and the time-frequency resource pattern of the DMRS in different time units, which is beneficial to the first
  • a network device measures the interference of the second network device at different time-frequency resource locations, which is beneficial to reduce resource collisions and avoid continuous strong interference by the second network device for the DMRS used for channel estimation.
  • the embodiment of the present application further provides another method for transmitting a reference signal, which is applicable to another communication system shown in FIG. 10 .
  • FIG. 10 shows another communication system 1000 provided by an embodiment of the present application.
  • the scenario includes a network device 1010 , a network device 1020 , a network device 1030 , a terminal device 1040 , and a terminal device 1050 .
  • the terminal equipment 1040 and the terminal equipment 1050 are within the coverage of the network equipment 1010 , that is, within the cell 1 .
  • the terminal device 1050 is within the coverage of the network device 1020 , that is, within the cell 2 .
  • the coverage areas of the network device 1010 , the network device 1020 and the network device 1030 have overlapping areas. In the overlapping area, one terminal device can communicate with multiple network devices, which will cause the transmission signals of the terminal devices in the overlapping area to interfere with the transmission signals of other terminal devices.
  • the terminal device 1040 performs uplink transmission with the network device 1010
  • the terminal device 1050 performs uplink transmission with the network device 1020.
  • the network device 1010 may also receive an uplink signal from the terminal device.
  • the uplink signal sent by 1050 to the network device 1020 causes the network device 1010 to be unable to accurately demodulate the uplink signal from the terminal device 1040 . Therefore, the uplink signal of the terminal device 1050 will cause interference to the uplink signal of the terminal device 1040, and interference measurement needs to be performed to solve the interference problem.
  • the present application also provides another method for transmitting a reference signal.
  • a reference signal By configuring different DMRS patterns for terminal equipment in different cells, it is staggered in time for interference measurement, which effectively reduces overlapping The interference caused by the terminal equipment in the area during uplink transmission.
  • the method in this embodiment of the present application may be performed by the above-mentioned network devices, and multiple network devices with overlapping coverages may perform information exchange to determine the number of cells to be configured, for example, through the Xn interface.
  • a cell is used as an example for description below, and the network devices and terminal devices of other cells perform the same operations, which will not be repeated.
  • the method includes the following steps:
  • Step 1 The network device sends indication information to the terminal device, where the indication information is used to indicate the time domain position occupied by the DMRS.
  • the terminal device receives the indication information from the network device.
  • Step 2 the terminal device sends the DMRS to the network device based on the indication information. Accordingly, the network device receives the DMRS from the terminal device.
  • the above indication information may indicate the time domain position of the DMRS in one time unit through RRC signaling or DCI signaling.
  • the indication manner of adopting DCI may be indicated by referring to the manner of the DCI indication field provided in the embodiment of the present application, and details are not described herein again.
  • Other time-domain positions in this time unit except the time-domain position of the DMRS can be used to configure zero-power uplink reference signals to measure interference from terminal equipments in different cells.
  • N may be determined in a predefined manner, or may be determined according to the RRC signaling configuration or the manner indicated by the DCI. The specific determination method is not limited in this application. To reduce signaling overhead, the above N is an integer greater than or equal to 2.
  • FIG. 11 shows a schematic diagram of a DMRS pattern of an embodiment of the present application.
  • the terminal equipment in the time domain location other than the DMRS sends a zero-power uplink reference signal, so that the network equipment can perform interference measurement.
  • Each small cell in FIG. 10 represents a resource unit, and from the horizontal axis, the indices corresponding to each time domain unit are 0, 1, 2, 3, 4, and 5.
  • the terminal equipment of cell 1 is at the time domain positions 0 and 1
  • the DMRS is sent on the corresponding resource unit, and the network device 1010 can measure the interference of the terminal device in cell 2 on the resource units with indices 2 and 3 corresponding to the time domain position, and the network device 1010 can be at the time domain position. Measure the interference of the terminal equipment in cell 3 on the resource unit of 5.
  • the terminal equipment of cell 2 is at time domain positions 2 and 3
  • the DMRS is sent on the corresponding resource unit, and the network device 1020 can measure the interference of the terminal device in cell 1 on the resource units with indices corresponding to 0 and 1 in the time domain position. Measure the interference of the terminal equipment in cell 3 on the resource unit of 5.
  • the terminal equipment of cell 3 is at time domain positions 4 and 5
  • the DMRS is sent on the corresponding resource unit, and the network device 1030 can measure the interference of the terminal device in cell 1 on the resource units with the indexes corresponding to 0 and 1 in the time domain position. Measure the interference of the terminal equipment in cell 2 on the resource unit of 3.
  • the DMRSs configured by the terminal equipment in each cell are completely staggered in the time domain. This configuration method can effectively perform interference measurement and can also improve the accuracy of channel estimation.
  • FIG. 12 shows a communication apparatus 1200 provided by an embodiment of the present application.
  • the apparatus 1200 includes: a processing module 1210 and a sending module 1220 .
  • the processing module 1210 is configured to determine a first configuration, the first configuration is whether the zero-power uplink reference signal and/or the demodulation reference signal DMRS is included in at least two time units; the sending module 1220 is configured to based on the In the first configuration, the zero-power uplink reference signal and/or the DMRS are sent to the first network device in at least two time units, and the zero-power uplink reference signal is used for interference measurement.
  • the processing module 1210 is further configured to: determine the above-mentioned first configuration according to the first indication information of the above-mentioned first network device, where the first indication information is used to instruct the apparatus 1200 whether to send the above-mentioned zero in at least two time units The power uplink reference signal and/or the DMRS; or, the above-mentioned first configuration is determined according to the first transmission rule agreed in the protocol.
  • the above-mentioned first sending rule includes at least two of the following: the above-mentioned at least two time units include at least one first time unit, and the first time unit is an uplink time unit in the first frame structure, and in the second frame
  • the structure is a downlink time unit, and the above-mentioned first configuration is: the at least one first time unit includes a zero-power uplink reference signal and a DMRS; the at least two time units include at least one second time unit, and the second time unit
  • the first frame structure is an uplink time unit, and the second frame structure is a downlink time unit, and the above-mentioned first configuration is: the at least one second time unit includes the zero-power uplink reference signal, and does not include DMRS; or, the at least two time units include at least one third time unit, and the third time unit is an uplink time unit in the first frame structure and the second frame structure, and the above-mentioned first configuration is: the at least one The third time unit does not include a zero
  • the processing module 1210 is further configured to: determine a second configuration, where the second configuration is the time-frequency resource occupied by the zero-power uplink reference signal and/or the DMRS; the sending module 1220 is further configured to: based on the second configuration , sending the above-mentioned zero-power uplink reference signal and/or DMRS to the first network device on the above-mentioned time-frequency resource.
  • the processing module 1210 is further configured to: determine the second configuration according to the second indication information of the first network device, where the second indication information is used to indicate the zero-power uplink reference signal and/or the occupied area of the DMRS.
  • a time-frequency resource pattern, the time-frequency resource pattern belongs to a time-frequency resource pattern set, and the one time-frequency resource pattern set is predefined by a protocol or configured by the first network device for the apparatus 1200 .
  • the processing module 1210 is further configured to: determine the second configuration according to the second indication information of the first network device, where the second indication information is used to indicate the index of the DMRS in the DMRS code division multiplexing CDM group.
  • the time-frequency resource occupied by the zero-power uplink reference signal is the set of time-frequency resources where the DMRS CDM group corresponding to the CDM configuration type of the DMRS is located, except the time-frequency resource occupied by the DMRS.
  • the processing module 1210 is further configured to: determine the above-mentioned second configuration according to a second transmission rule agreed in the protocol, where the second transmission rule includes: the index of the time-frequency resource pattern of the above-mentioned zero-power uplink reference signal and at least two time There is an association between the indices of the time units in the unit.
  • the apparatus 1200 may be specifically the terminal device in the foregoing embodiment, and the apparatus 1200 may be configured to execute each process and/or step corresponding to the terminal device in the foregoing method 500 , in order to avoid repetition, it will not be repeated here.
  • FIG. 13 shows another communication apparatus 1300 provided by an embodiment of the present application.
  • the apparatus 1300 includes: a processing module 1310 , a receiving module 1320 , and a sending module 1330 .
  • the processing module 1310 is used to determine the first configuration, the first configuration is whether the zero-power uplink reference signal and/or the demodulation reference signal DMRS is included in at least two time units; the receiving module 1320 is used to receive the terminal The zero-power uplink reference signal and/or DMRS sent by the device in the above at least two time units, where the zero-power uplink reference signal is used for interference measurement.
  • the sending module 1330 is configured to send first indication information to the terminal device according to the above-mentioned first configuration, where the first indication information is used to indicate whether the above-mentioned terminal equipment sends the above-mentioned zero-power uplink reference signal in at least two time units and/or DMRS; the processing module 1310 is further configured to determine the above-mentioned first configuration according to the first sending rule agreed in the protocol.
  • the first sending rule includes at least one of the following: the at least two time units include at least one first time unit, and the first time unit is an uplink time unit in the first frame structure, and is an uplink time unit in the second frame structure.
  • the middle is a downlink time unit, and the above-mentioned first configuration is: the at least one first time unit includes a zero-power uplink reference signal and a DMRS; the at least two time units include at least one second time unit, and the second time unit is in The first frame structure is an uplink time unit, and the second frame structure is a downlink time unit, and the above-mentioned first configuration is: the at least one second time unit includes the zero-power uplink reference signal and does not include DMRS Or, the above-mentioned at least two time units include at least one third time unit, and the third time unit is an uplink time unit in the first frame structure and the second frame structure, and the above-mentioned first configuration is: the at least one first time unit The three time units do not include
  • the processing module 1310 is further configured to: determine a second configuration, where the second configuration is the time-frequency resources occupied by the above-mentioned zero-power uplink reference signal and/or the DMRS; the receiving module 1320 is further configured to: receive the above-mentioned terminal equipment at The zero-power uplink reference signal and/or the DMRS sent on the time-frequency resource.
  • the sending module 1330 is further configured to: send second indication information to the terminal device according to the second configuration, where the second indication information is used to indicate the time-frequency resources occupied by the zero-power uplink reference signal and/or the DMRS
  • the time-frequency resource pattern belongs to a time-frequency resource pattern set, and the time-frequency resource pattern set is predefined by the protocol or configured by the apparatus for the terminal device.
  • the sending module 1330 is further configured to: send second indication information to the terminal device according to the second configuration, where the second indication information is used to indicate the index of the DMRS code division multiplexing CDM group in the DMRS.
  • the time-frequency resource occupied by the zero-power uplink reference signal is the set of time-frequency resources where the DMRS CDM group corresponding to the CDM configuration type of the DMRS is located, except the time-frequency resource occupied by the DMRS.
  • the processing module 1310 is further configured to: determine the above-mentioned second configuration according to a second transmission rule agreed in the protocol, where the second transmission rule includes: the index of the time-frequency resource pattern of the above-mentioned zero-power uplink reference signal and the above-mentioned at least two There is an association relationship between the indices of the time units in the time unit.
  • the apparatus 1300 may be specifically the first network device in the foregoing embodiment, and the apparatus 1300 may be configured to execute each process corresponding to the first network device in the foregoing method 500 and/or steps, in order to avoid repetition, details are not repeated here.
  • module as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor for executing one or more software or firmware programs (eg, a shared processor, a dedicated processor, or a group of processors, etc.) and memory, merge logic, and/or other suitable components to support the described functions.
  • ASIC application specific integrated circuit
  • the above-mentioned apparatus 1200 and apparatus 1300 have the functions of implementing the corresponding steps in the above-mentioned method 500; the above-mentioned functions may be implemented by hardware, or by executing corresponding software in hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the apparatus 1200 and the apparatus 1300 may also be a chip or a system of chips, such as a system on chip (system on chip, SoC). This application is not limited here.
  • SoC system on chip
  • FIG. 14 shows yet another communication apparatus 1400 provided by an embodiment of the present application.
  • the apparatus 1400 includes a processor 1410 , a transceiver 1420 and a memory 1430 .
  • the processor 1410, the transceiver 1420 and the memory 1430 communicate with each other through an internal connection path, the memory 1430 is used to store instructions, and the processor 1410 is used to execute the instructions stored in the memory 1430 to control the transceiver 1420 to send signals and / or receive signals.
  • the apparatus 1400 may be specifically the terminal device or the first network device in the foregoing embodiments, or the functions of the terminal device or the first network device in the foregoing embodiments may be integrated in the apparatus 1400, and the apparatus 1400 may be used to execute Various steps and/or processes corresponding to the terminal device or the first network device in the foregoing embodiments.
  • the memory 1430 may include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory.
  • the memory may also store device type information.
  • the processor 1410 may be configured to execute the instructions stored in the memory, and when the processor executes the instructions, the processor may execute various steps and/or processes corresponding to the terminal device or the first network device in the foregoing method embodiments.
  • the processor 1410 may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs). ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • each step of the above-mentioned method 500 may be completed by an integrated logic circuit of hardware in the processor 1410 or instructions in the form of software.
  • the steps of the methods disclosed in combination with the embodiments of the present application may be directly embodied as executed by the hardware processor 1410, or executed by a combination of hardware and software modules in the processor 1410.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor 1410 executes the instructions in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.
  • An implementation of the present application further provides a communication system, which may include the terminal device (ie, the apparatus 1200 ) shown in FIG. 12 and the first network device (ie, the apparatus 1300 ) shown in FIG. 13 .
  • the present application provides a computer-readable storage medium, where the computer-readable storage medium is used to store a computer program, and the computer program is used to implement the methods corresponding to the terminal devices shown in various possible implementation manners in the foregoing embodiments.
  • the present application provides another computer-readable storage medium, where the computer-readable storage medium is used to store a computer program, and the computer program is used to implement the method corresponding to the first network device shown in the various possible implementation manners in the foregoing embodiments .
  • the present application provides a computer program product, the computer program product includes a computer program (also referred to as code, or instructions), when the computer program runs on a computer, the computer can execute various possible implementations in the above embodiments The method corresponding to the terminal device shown in the method.
  • a computer program also referred to as code, or instructions
  • the present application provides another computer program product, the computer program product includes a computer program (also referred to as code, or instructions), when the computer program runs on a computer, the computer can execute various possible implementations in the above embodiments.
  • the method corresponding to the first network device shown in the implementation manner is implemented.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé de transmission de signal de référence et un appareil de communication, qui permettent à un dispositif terminal et à un premier dispositif de réseau d'aligner des modes de configuration d'un signal de référence sur au moins deux unités temporelles pour mettre en œuvre une mesure d'interférence. Le procédé comprend les étapes suivantes : un dispositif terminal et un dispositif de réseau déterminent une première configuration, la première configuration étant si un signal de référence de liaison montante de puissance nulle et/ou un signal de référence de démodulation (DMRS) sont compris sur les deux, ou plus, unités temporelles ; le dispositif terminal envoie le signal de référence de liaison montante de puissance nulle et/ou le signal DMRS à un premier dispositif de réseau sur les deux, ou plus, unités temporelles sur la base de la première configuration, le signal de référence de liaison montante de puissance nulle étant utilisé pour une mesure d'interférence. De manière correspondante, le premier dispositif de réseau reçoit le signal de référence de liaison montante de puissance nulle et/ou le signal DMRS envoyés par le dispositif terminal sur les deux, ou plus, unités temporelles.
PCT/CN2021/072949 2021-01-20 2021-01-20 Procédé de transmission de signal de référence et appareil de communication WO2022155824A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2021/072949 WO2022155824A1 (fr) 2021-01-20 2021-01-20 Procédé de transmission de signal de référence et appareil de communication
CN202180088676.9A CN116724580A (zh) 2021-01-20 2021-01-20 参考信号的传输方法和通信装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/072949 WO2022155824A1 (fr) 2021-01-20 2021-01-20 Procédé de transmission de signal de référence et appareil de communication

Publications (1)

Publication Number Publication Date
WO2022155824A1 true WO2022155824A1 (fr) 2022-07-28

Family

ID=82548311

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/072949 WO2022155824A1 (fr) 2021-01-20 2021-01-20 Procédé de transmission de signal de référence et appareil de communication

Country Status (2)

Country Link
CN (1) CN116724580A (fr)
WO (1) WO2022155824A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024216459A1 (fr) * 2023-04-17 2024-10-24 Nokia Shanghai Bell Co., Ltd. Configuration pour signal de référence de liaison montante

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103391629A (zh) * 2012-05-10 2013-11-13 中兴通讯股份有限公司 一种参考信号的配置方法和系统
CN103891183A (zh) * 2011-09-06 2014-06-25 Lg电子株式会社 用于测量无线通信系统中的干扰的方法和设备
WO2018214149A1 (fr) * 2017-05-26 2018-11-29 Oppo广东移动通信有限公司 Procédé d'émission de signal de liaison montante, terminal et dispositif de réseau
US20190260544A1 (en) * 2016-11-04 2019-08-22 Huawei Technologies Co., Ltd. Uplink measurement reference signal transmission method, apparatus, and system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103891183A (zh) * 2011-09-06 2014-06-25 Lg电子株式会社 用于测量无线通信系统中的干扰的方法和设备
CN103391629A (zh) * 2012-05-10 2013-11-13 中兴通讯股份有限公司 一种参考信号的配置方法和系统
US20190260544A1 (en) * 2016-11-04 2019-08-22 Huawei Technologies Co., Ltd. Uplink measurement reference signal transmission method, apparatus, and system
WO2018214149A1 (fr) * 2017-05-26 2018-11-29 Oppo广东移动通信有限公司 Procédé d'émission de signal de liaison montante, terminal et dispositif de réseau

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI, HISILICON: "UL SRS design for CSI acquisition and beam management", 3GPP DRAFT; R1-1701699, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Athens, Greece; 20170213 - 20170217, 12 February 2017 (2017-02-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051208865 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024216459A1 (fr) * 2023-04-17 2024-10-24 Nokia Shanghai Bell Co., Ltd. Configuration pour signal de référence de liaison montante

Also Published As

Publication number Publication date
CN116724580A (zh) 2023-09-08

Similar Documents

Publication Publication Date Title
US20220159724A1 (en) Indication Signal Transmission Method And Apparatus
CN108347778B (zh) 通信方法及装置
WO2020143732A1 (fr) Procédé de transmission de canal de rétroaction, procédé de réception de canal de rétroaction et appareil
CN109392120B (zh) 信息指示方法及相关设备
CN111867038B (zh) 一种通信方法及装置
EP3606236B1 (fr) Procédé et appareil permettant de déterminer une taille de bloc de transport
EP3637904A1 (fr) Procédé et dispositif d'indication de ressource
WO2019137510A1 (fr) Procédé et dispositif d'indication de réservation de ressources
CN111867095A (zh) 一种通信方法与终端装置
CN112312463A (zh) 上报信道状态信息的方法和装置
CN115136523A (zh) 反馈资源的确定方法和装置
WO2022155824A1 (fr) Procédé de transmission de signal de référence et appareil de communication
US20230403687A1 (en) Communication Method and Apparatus
WO2020233370A1 (fr) Procédé et dispositif de communication
WO2023131235A1 (fr) Procédé, appareil et système de transmission d'informations
WO2023030205A1 (fr) Procédé d'indication de ressource et appareil de communication
US20190222273A1 (en) Communication Method, Network Device, and Terminal Device
WO2022082767A1 (fr) Procédé de communication et dispositif associé
CN111757495B (zh) 一种通信方法及设备
CN112399580B (zh) 一种通信方法及装置
WO2022077142A1 (fr) Procédé d'envoi de canal partagé de liaison montante physique et appareil de communication
WO2022141106A1 (fr) Procédé et dispositif de transmissions répétées de canal de données
WO2024140774A1 (fr) Procédé et appareil de communication
CN110740513A (zh) 一种通信方法及装置
WO2023011613A1 (fr) Procédé et appareil de communication sans fil

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21920227

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202180088676.9

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21920227

Country of ref document: EP

Kind code of ref document: A1