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WO2019015468A1 - Procédé de transmission de données, dispositif réseau et dispositif terminal - Google Patents

Procédé de transmission de données, dispositif réseau et dispositif terminal Download PDF

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Publication number
WO2019015468A1
WO2019015468A1 PCT/CN2018/093957 CN2018093957W WO2019015468A1 WO 2019015468 A1 WO2019015468 A1 WO 2019015468A1 CN 2018093957 W CN2018093957 W CN 2018093957W WO 2019015468 A1 WO2019015468 A1 WO 2019015468A1
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WIPO (PCT)
Prior art keywords
dmrs
indication information
time domain
terminal device
network device
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2018/093957
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English (en)
Chinese (zh)
Inventor
任翔
刘永
毕晓艳
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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
Priority claimed from CN201711199168.XA external-priority patent/CN109274472B/zh
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP18835276.9A priority Critical patent/EP3522644A4/fr
Priority to CN201880041837.7A priority patent/CN111052828B/zh
Publication of WO2019015468A1 publication Critical patent/WO2019015468A1/fr
Priority to US16/432,525 priority patent/US10938531B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • SU single-user multi-input multi-output
  • MIMO multiplexing, demodulation reference.
  • the demodulation reference signal (DMRS) occupies 24 REs.
  • the DMRS port may be mapped on the 0th, 1st, 5th, 6th, 10th, and 11th subcarriers of each resource block (RB) pair; in the time domain, the DMRS Ports can be mapped on 5, 6, 12, and 13 symbols per subframe.
  • the DMRS is usually mapped in the PRB with a fixed pilot map according to the total number of antenna ports, and each DMRS port has the same function.
  • 5G NR for multi-scene, multi-band and multi-transmission methods
  • future systems need to be able to face a variety of complex communication scenarios to meet complex and diverse business needs.
  • Existing DMRS with fixed mapping and single function. Mapping and configuration solutions are no longer able to meet the complex and diverse needs of the future.
  • the data transmission method, the network device, and the terminal device provided by the embodiments of the present application can flexibly configure the time domain resources used for transmitting the DMRS between the network device and the terminal device, so as to meet different service requirements of the terminal device.
  • the first aspect provides a data transmission method, including: the network device selects at least one target time domain resource from a plurality of candidate time domain resources, where the at least one target time domain resource is used to carry a DMRS; The terminal device sends first indication information, where the first indication information is used to indicate the at least one target time domain resource.
  • the network device may select at least one target time domain resource from the plurality of candidate time domain resources, and send the first indication information to the terminal device to indicate the at least one target time domain resource, where the terminal device is configured according to the network device, Determining a target time domain resource carrying the DMRS, and then transmitting the DMRS through the target time domain resource and the network device.
  • the DMRS is carried in at least one resource unit.
  • the network device may send the DMRS by using the target time domain resource; correspondingly, the terminal device receives the target time domain resource by using the target time domain resource.
  • the DMRS is sent by the terminal device through the target time domain resource; correspondingly, the network device receives the DMRS through the target time domain resource, which is not limited in this embodiment of the present application.
  • the data transmission method of the embodiment of the present invention can flexibly configure the time domain resources used for transmitting the DMRS between the network device and the terminal device, so as to meet different service requirements of the terminal device.
  • the network device may select at least one target time domain resource from the plurality of candidate time domain resources according to the service requirement or the application scenario of the terminal device.
  • the application scenario may be that the terminal device is currently in a high-speed moving scene, a medium-speed moving scene, or a low-speed moving scene according to a channel change condition of the terminal device, or may be a different frame structure, for example, current frame feedback, non-current
  • the frame feedback and the like are not limited in this embodiment of the present application.
  • the DMRS basic pattern can be understood as a DMRS pattern that can support the maximum number of ports on a certain number of consecutive symbols in a time domain within a resource unit. It should be noted that DMRS is not limited here.
  • the specific symbol position of the basic pattern for example, can be placed in front or back, and the number of specific symbols of the DMRS basic pattern is not limited.
  • the DMRS basic pattern can be 1 symbol or 2 symbols.
  • the multiplexing mode of the ports in the DMRS basic pattern is also not limited, as shown in the example given in FIG.
  • one DMRS and the number of DMRS mentioned in this paper are all for the basic pattern of DMRS, that is, one DMRS is a basic pattern of DMRS, and the number of DMRS is the number of basic patterns of DMRS.
  • the DMRS may be placed in the corresponding time domain position by placing it forward or backward, and the forward or backward placement referred to here is the absolute of the DMRS port.
  • the port number is sorted.
  • the backward position means that the DMRS port is mapped from the time domain of the basic pattern to the time symbol of the base symbol in the order of small to large.
  • the forward placement is
  • the mapping of the DMRS is not limited to the DMRS port mapping sequence.
  • the mapping mode of the DMRS can be understood as the port mapping order of the DMRS.
  • DMRS pattern which contains a time-frequency mapping resource of DMRS in a resource unit, wherein the DMRS pattern is composed of at least one DMRS basic pattern.
  • a DMRS pattern may include only one DMRS basic pattern, or may include multiple identical DMRS basic patterns, and may also include a plurality of different DMRS basic patterns, which are not limited in this embodiment of the present application.
  • the basic pattern of the DMRS located in the front symbol may be the same as or different from the basic pattern of the DMRS located in the rear symbol.
  • the DMRS basic pattern can occupy 2 symbols for the DMRS located in the front symbol, and the DMRS basic pattern can occupy 1 symbol for the DMRS located in the rear symbol, but this embodiment of the present application Not limited.
  • the first The indication information is specifically used to indicate a target DMRS pattern, where the time domain resource used to carry the DMRS in the target DMRS pattern is the at least one target time domain resource, and the network device selects at least one of the candidate time domain resources.
  • a target time domain resource comprising: the network device selecting the target DMRS pattern from a plurality of candidate DMRS patterns.
  • the network device may select a target DMRS pattern from the preset multiple candidate DMRS patterns, where the target DMRS pattern is used to carry the time domain resource of the DMRS.
  • the network device may indicate the target DMRS pattern by the first indication information.
  • the network device may select the target DMRS pattern according to the service requirement or the application scenario of the terminal device, or select the target DMRS pattern according to the system parameter, that is, the specific frame structure, and may also combine the two to select, and the application is implemented. This example does not limit this.
  • the determining, by the network device, the target DMRS pattern from the multiple candidate DMRS patterns the network device determining the DMRS Determining, by the network device, at least one DMRS pattern corresponding to the number of the DMRSs from the plurality of candidate DMRS patterns according to the number of the DMRSs;
  • the target DMRS pattern is selected from at least one DMRS pattern.
  • the network device may determine the number of DMRSs required for the current transmission according to the service requirement or the application scenario of the terminal device, and select at least one DMRS pattern corresponding to the number of the DMRSs from the multiple candidate DMRS patterns.
  • the target DMRS pattern is selected from the at least one DMRS pattern according to system parameters.
  • the different DMRS patterns in the at least one DMRS pattern may be bound to different system parameters, and the system parameters may be the number of PDCCHs, the system bandwidth, the frame structure, or the basic pattern of the DMRS, and the like, and may also be any other The parameters are not limited in this embodiment of the present application.
  • the basic pattern of the DMRS may specifically occupy 1 symbol or 2 symbols in the time domain.
  • the application scenario of the terminal device may be differentiated according to the moving speed of the terminal, and may be classified into a low-speed moving scenario (for example, less than 30 km/h), a medium-speed moving scenario (for example, between 30 km/h and 120 km/h), and a high speed.
  • Moving scenes eg between 120km/h and 500km/h
  • ultra-high speed moving scenes eg greater than 500km/h.
  • the method before the sending, by the network device, the first indication information to the terminal device, the method further includes: the network device The terminal device sends the second indication information, where the second indication information is used to indicate the multiple candidate DMRS patterns.
  • the network device may first configure a plurality of candidate DMRS patterns to the terminal device by using the second indication information, and then select, by using the first indication information, the plurality of candidate DMRS patterns.
  • the second indication information is carried in the RRC signaling, where the first indication information is carried in the DCI signaling.
  • the first indication information is specifically used to indicate at least one target time domain location corresponding to the at least one target time domain resource And selecting, by the network device, the at least one target time domain resource from the plurality of candidate time domain resources, including: the network device selecting the at least one target time domain location from the candidate time domain location set, where the candidate time The set of domain locations includes at least one candidate time domain location.
  • the network device may select at least one target time domain location from the preset candidate time domain location set, where the at least one target time domain location corresponds to the target time domain resource.
  • the network device may indicate the at least one target time domain resource by using the first indication information.
  • the network device may select the target DMRS pattern according to the service requirement or the application scenario of the terminal device, or select the at least one target time domain according to the system parameter, that is, the specific frame structure, and may also combine the two to select,
  • the application embodiment does not limit this.
  • the foregoing DMRS candidate time domain location set may be ⁇ 4, 7, 10, 13 ⁇ , ⁇ 4, 11 ⁇ , ⁇ 3, 8, 13 ⁇ , ⁇ 4, 7, 11, 14 ⁇ , any one or more of ⁇ 4, 5, 11, 12 ⁇ .
  • the network device may first be from the multiple DMRS candidate time domain location sets.
  • a DMRS candidate time domain location set is selected, and at least one candidate time domain location is selected according to the selected DMRS candidate time domain location set, but the embodiment of the present application does not limit this.
  • the representation of the time domain location in the above set is to correspond to the number 1 to 14 of the time domain resource in the resource unit, and when the number of the domain resource changes, the time domain location in the collection
  • the representation can also be changed accordingly.
  • the number of the time domain resource may be represented by 0 to 13, in addition to the first symbol 1 to 7 and the rear symbol 1 to 7, or the front symbol 0 to 6 may be used.
  • the rear symbols 0 to 6 are used, and therefore, the time domain position in the set can adopt a corresponding representation method, which is not limited by the embodiment of the present application.
  • the above set may be indirectly represented by a formula or other means.
  • the DMRS basic pattern may have a scenario in which the subcarriers in the symbol are not fully occupied. At this time, part of the subcarriers corresponding to the symbol used to carry the DMRS may be used to transmit data, or may not be placed. The data is used for power boosting of the DMRS. Therefore, the “time domain resource carrying the DMRS” in the embodiment of the present application may include the case where all subcarriers on one symbol are occupied by the DMRS, and may also include A case where a part of subcarriers on one symbol is occupied by a DMRS.
  • the method before the sending, by the network device, the first indication information to the terminal device, the method further includes: the network device The terminal device sends the third indication information, where the third indication information is used to indicate the candidate time domain location set.
  • the network device may first configure a candidate time domain location set to the terminal device by using the third indication information, and then select, by using the first indication information, the candidate time domain location set.
  • the third indication information is carried in the RRC signaling, where the first indication information is carried in the DCI signaling.
  • the first indication information is carried in any one of the following signaling: radio resource control RRC signaling, downlink control information DCI and media access control MAC layer control element CE signaling.
  • the remaining time domain locations except for carrying the DMRS may be used to transmit data, and may be used to transmit other reference signals RS (for example, channel state information reference signal).
  • RS for example, channel state information reference signal
  • the CSI-RS, the Sounding Reference Signal (SRS), and the like can also be used to transmit other control signaling, which is not limited in this embodiment of the present application.
  • the PDCCH may not exist, and may also occupy the first 1-3 symbols in the resource unit, and the PUCCH used to carry the feedback information ACK/NACK may not exist, or may occupy the last few symbols in the resource unit. Therefore, in a case where the DMRS pattern configured by the network device conflicts with the time domain location of other signaling or other RSs, the DMRS may not be placed on the corresponding time domain resource, frequency domain resource or time-frequency resource. That is, for different frame structures, the DMRS can avoid time domain resource placement occupied by other control signaling (such as PDCCH) or RS. Specifically, the entire time domain location occupied can be avoided, and the time domain can be avoided. Some of the occupied frequency domain locations.
  • other control signaling such as PDCCH
  • the second aspect provides another data transmission method, including: receiving, by the terminal device, first indication information sent by the network device, where the first indication information is used to indicate at least one target time domain resource, the at least one target time domain The resource is used to carry the DMRS, and the at least one target time domain resource is selected by the network device from the plurality of candidate time domain resources; and the terminal device transmits the location with the network device according to the first indication information.
  • first indication information is used to indicate at least one target time domain resource
  • the at least one target time domain The resource is used to carry the DMRS, and the at least one target time domain resource is selected by the network device from the plurality of candidate time domain resources
  • the terminal device transmits the location with the network device according to the first indication information.
  • the data transmission method of the embodiment of the present invention can flexibly configure the time domain resources used for transmitting the DMRS between the network device and the terminal device, so as to meet different service requirements of the terminal device.
  • the first indication information is specifically used to indicate a target DMRS pattern, where the target DMRS pattern is used to carry the DMRS
  • the time domain resource is the at least one target time domain resource, and the target DMRS pattern is selected by the network device from a plurality of candidate DMRS patterns; the terminal device determines the at least according to the first indication information
  • a target time domain resource comprising: the terminal device determining the at least one target time domain resource according to the target DMRS pattern.
  • the method before the receiving, by the terminal device, the first indication information sent by the network device, the method further includes: receiving, by the terminal device The second indication information sent by the network device, where the second indication information is used to indicate the multiple candidate DMRS patterns.
  • the first indication information is specifically used to indicate at least one target time domain location corresponding to the at least one target time domain resource
  • the at least one target time domain location is selected by the network device from the candidate time domain location set, the candidate time domain location set includes at least one candidate time domain location; and the terminal device is configured according to the first indication information Determining the at least one target time domain resource, including: determining, by the terminal device, the at least one target time domain resource according to the at least one target time domain location.
  • the method before the receiving, by the terminal device, the first indication information sent by the network device, the method further includes: receiving, by the terminal device The third indication information sent by the network device, where the third indication information is used to indicate the candidate time domain location set.
  • the first indication information is carried in any one of the following signaling: radio resource control RRC signaling, downlink control information DCI and media access control MAC layer control element CE signaling.
  • the network device and the terminal device may select the target time domain resource according to a default rule. In this case, the network device does not need to send the indication information to the terminal device, which can save the signaling overhead.
  • the method includes: the network device determines at least one target time domain resource that carries the DMRS; the terminal device determines at least one target time domain resource that carries the DMRS; the network device sends the DMRS by using the at least one target time domain resource; Receiving, by the terminal device, the DMRS by using the at least one target time domain resource; or sending, by the terminal device, the DMRS by using the at least one target time domain resource; correspondingly, the network device receiving, by using the at least one target time domain resource, The DMRS.
  • the network device and the terminal device may determine at least one target time domain resource that carries the DMRS according to a service requirement or an application scenario of the terminal device or other default system parameters.
  • the terminal device may configure the time domain resource that carries the DMRS to the network device by using the signaling, which is not limited in this embodiment of the present application.
  • a network device for performing the method of the first aspect or any possible implementation of the first aspect.
  • the apparatus comprises means for performing the method of any of the above-described first aspect or any of the possible implementations of the first aspect.
  • a terminal device for performing the method in any of the possible implementations of the second aspect or the second aspect.
  • the apparatus comprises means for performing the method of any of the possible implementations of the second aspect or the second aspect described above.
  • a network device comprising: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals
  • the processor executes the instructions stored by the memory, the executing causes the processor to perform the method of the first aspect or any of the possible implementations of the first aspect.
  • a terminal device comprising: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals
  • the processor executes the instructions stored by the memory, the executing causes the processor to perform the method of any of the possible implementations of the second aspect or the second aspect.
  • a computer program product comprising: computer program code, when the computer program code is run on a computer, causing the computer to perform any of the first aspect or the first aspect described above A possible implementation.
  • a computer program product comprising: computer program code, when the computer program code is run on a computer, causing the computer to perform any of the second aspect or the second aspect described above A possible implementation.
  • a ninth aspect a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • a computer readable medium for storing a computer program comprising instructions for performing the method of any of the second aspect or any of the possible implementations of the second aspect.
  • FIG. 1 shows a schematic diagram of a communication system of an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a resource unit provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram showing a basic pattern of a DMRS according to an embodiment of the present application.
  • FIG. 4 shows a schematic flow chart of a data transmission method according to an embodiment of the present application.
  • FIG. 5 shows a schematic flow chart of another data transmission method according to an embodiment of the present application.
  • 6 through 35 illustrate schematic diagrams of DMRS patterns in accordance with one embodiment of the present application.
  • 36 to 60 are diagrams showing a DMRS pattern according to another embodiment of the present application.
  • FIG. 61 shows a schematic block diagram of a network device in accordance with an embodiment of the present application.
  • FIG. 62 shows a schematic block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 63 shows a schematic block diagram of a network device in accordance with an embodiment of the present application.
  • FIG. 64 shows a schematic block diagram of a terminal device according to an embodiment of the present application.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA Wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD LTE frequency division duplex
  • TDD LTE time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • SCMA sparse code multiple access
  • SCMA sparse code multiple access
  • OFDM Orthogonal frequency division multiplexing
  • FBMC filter bank multi-carrier
  • GFDM generalized frequency division multiplexing
  • filtered-OFDM, F-OFDM filtered-OFDM, F-OFDM
  • the terminal device may communicate with one or more core networks via a radio access network (RAN), and the terminal device may be referred to as an access terminal and a user equipment (user Equipment, UE), 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.
  • the access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication.
  • PLMN public land mobile network
  • the network device may be used to communicate with the terminal device, where the network device may be a base transceiver station (BTS) in a GSM system or a CDMA system, or may be a base station in a WCDMA system ( Node B, NB), may also be an evolved base station (evolutional node B, eNB or eNode B) in the LTE system, or the network device may be a relay station, an access point, an in-vehicle device, a wearable device, or a future 5G network.
  • BTS base transceiver station
  • Node B, NB Node B
  • eNB evolved base station
  • the network device may be a relay station, an access point, an in-vehicle device, a wearable device, or a future 5G network.
  • Network side device or network device in a future evolved PLMN network may be used to communicate with the terminal device, where the network device may be a base transceiver station (BTS) in a GSM system
  • the embodiments of the present application can be applied to an LTE system and a subsequent evolved system, such as 5G, or other wireless communication systems using various radio access technologies, such as using code division multiple access, frequency division multiple access, time division multiple access, and orthogonal.
  • a system of access frequency division multiple access, single carrier frequency division multiple access, etc. is particularly suitable for scenarios requiring channel information feedback and/or applying secondary precoding techniques, such as a wireless network using Massive MIMO technology, and a distributed antenna for application.
  • MIMO multiple-input multiple-output
  • Antenna transmission and reception improve communication quality. It can make full use of space resources and achieve multiple transmission and reception through multiple antennas. It can multiply the system channel capacity without increasing spectrum resources and antenna transmission power.
  • MIMO can be divided into single-user MIMO (SU-MIMO) and multi-user MIMO (MU-MIMO).
  • SU-MIMO single-user MIMO
  • MU-MIMO multi-user MIMO
  • Massive MIMO arranges hundreds of antennas at the transmitting end, modulates the respective beams for dozens of target receivers, and transmits dozens of signals simultaneously on the same frequency resource through spatial signal isolation. Therefore, Massive MIMO technology can make full use of the spatial freedom brought by large-scale antenna configuration to improve spectrum efficiency.
  • the communication system 100 includes a network device 102, which may include multiple antenna groups.
  • Each antenna group may include one or more antennas, for example, one antenna group may include antennas 104 and 106, another antenna group may include antennas 108 and 110, and an additional group may include antennas 112 and 114.
  • Two antennas are shown in Figure 1 for each antenna group, although more or fewer antennas may be used for each group.
  • Network device 102 may additionally include a transmitter chain and a receiver chain, as will be understood by those of ordinary skill in the art, which may include various components related to signal transmission and reception, such as processors, modulators, multiplexers, solutions. Tuner, demultiplexer or antenna.
  • Network device 102 can communicate with a plurality of terminal devices, for example, network device 102 can communicate with terminal device 116 and terminal device 122. However, it will be appreciated that network device 102 can communicate with any number of terminal devices similar to terminal device 116 or 122.
  • Terminal devices 116 and 122 may be, for example, cellular telephones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable for communicating over wireless communication system 100. device.
  • terminal device 116 is in communication with antennas 112 and 114, wherein antennas 112 and 114 transmit information to terminal device 116 over forward link 118 and receive information from terminal device 116 over reverse link 120.
  • terminal device 122 is in communication with antennas 104 and 106, wherein antennas 104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.
  • forward link 118 may utilize a different frequency band than reverse link 120
  • forward link 124 may utilize a different frequency band than reverse link 126.
  • the forward link 118 and the reverse link 120 can use a common frequency band, and the forward link 124 and the reverse link 126 can be used in common. frequency band.
  • Each set of antennas and/or regions designed for communication is referred to as a sector of network device 102.
  • the antenna group can be designed to communicate with terminal devices in sectors of the network device 102 coverage area.
  • the transmit antenna of network device 102 may utilize beamforming to improve the signal to noise ratio of forward links 118 and 124.
  • the network device 102 uses beamforming to transmit signals to the randomly dispersed terminal devices 116 and 122 in the relevant coverage area, the network device 102 uses a single antenna to transmit signals to all of its terminal devices. Mobile devices are subject to less interference.
  • network device 102, terminal device 116, or terminal device 122 may be a wireless communication transmitting device and/or a wireless communication receiving device.
  • the wireless communication transmitting device can encode the data for transmission.
  • the wireless communication transmitting device may acquire a certain number of data bits to be transmitted to the wireless communication receiving device through a channel, for example, the wireless communication transmitting device may generate, receive from another communication device, or save in a memory, etc., to be transmitted through a channel.
  • a certain number of data bits to the wireless communication receiving device may be included in a transport block or a plurality of transport blocks of data, and the transport blocks may be segmented to produce a plurality of code blocks.
  • the communication system 100 may be a public land mobile network PLMN network or a device to device (D2D) network or a machine to machine (M2M) network or other network, and FIG. 1 is merely an example for convenience of understanding.
  • PLMN public land mobile network
  • D2D device to device
  • M2M machine to machine
  • FIG. 1 is merely an example for convenience of understanding.
  • a simplified schematic diagram of the network may also include other network devices, which are not shown in FIG.
  • the resource unit is similar to the RB pair and the RB pair in the LTE standard.
  • the resource unit can be used as a basic unit for scheduling resource allocation. It can also be used to describe the arrangement of multiple reference signals.
  • the resource unit may be composed of a plurality of consecutive subcarriers in the frequency domain and a time interval (TI) in the time domain.
  • TI time interval
  • the TI here may be a transmission time interval (TTI) in the LTE system, or may be a short TTI at the symbol level, or a short TTI at a large subcarrier interval in the high frequency system, or may be in a 5G system. Slot or mini-slot, etc. This application does not limit this.
  • one resource unit may include one or more RBs, one or more RB pairs, and the like, and may also be a half RB or the like.
  • other time-frequency resources may also be used, which is not limited in this application.
  • the RB pair is composed of 12 consecutive subcarriers in the frequency domain and one subframe in the time domain.
  • a time-frequency resource composed of one subcarrier in the frequency domain and one symbol in the time domain is a resource element (RE), as shown in FIG. 2.
  • the RB pair in FIG. 2 is composed of 12 consecutive subcarriers (numbered 1 to 12) in the frequency domain and 14 symbols (numbered 1 to 14) in the time domain.
  • the abscissa represents the time domain and the ordinate represents the frequency domain.
  • symbol in the present application may include, but is not limited to, any of the following: orthogonal frequency division multiplexing (OFDM) symbols, universal filtered multi-carrier (UFMC) signals. , filter group multi-carrier (FBMC) symbols, generalized frequency-division multiplexing (GFDM) symbols.
  • OFDM orthogonal frequency division multiplexing
  • UMC universal filtered multi-carrier
  • FBMC filter group multi-carrier
  • GFDM generalized frequency-division multiplexing
  • the DMRS basic pattern can be understood as a DMRS pattern that can support the maximum number of ports on a certain number of consecutive symbols in a time domain within a resource unit. It should be noted that DMRS is not limited here.
  • the specific symbol position of the basic pattern for example, can be placed in front or back, and the number of specific symbols of the DMRS basic pattern is not limited.
  • the DMRS basic pattern can be 1 symbol or 2 symbols.
  • the multiplexing mode of the ports in the DMRS basic pattern is also not limited.
  • FIG. 3 specifically shows a schematic diagram of four DMRS basic patterns, but it should be understood that the embodiment of the present application does not limit this.
  • DMRS ports are mapped to one symbol, and four DMRS ports are divided into two groups.
  • the DMRS ports in each group are multiplexed into the same time-frequency resource by CDM (CS or OCC), and the two groups of DMRS ports are restored by FDM.
  • 8 DMRS ports are mapped to 2 consecutive symbols, 8 DMRS ports are divided into two groups, and DMRS ports in each group are multiplexed to the same time-frequency resource by CDM (CS+OCC or OCC), and 2 groups of DMRS The port is multiplexed by FDM;
  • 6 DMRS ports are mapped to 1 symbol, 6 DMRS ports are divided into 3 groups, and DMRS ports in each group are multiplexed to the same time-frequency resource by CDM (OCC or CS), and 3 groups of DMRS ports are restored by FDM.
  • CDM OCC or CS
  • 12 DMRS ports are mapped to 2 consecutive symbols, 12 DMRS ports are divided into 3 groups, and DMRS ports in each group are multiplexed to the same time-frequency resource by CDM (OCC or CS+OCC), and 3 groups of DMRS Ports are multiplexed through FDM.
  • CDM OCC or CS+OCC
  • one DMRS and the number of DMRS mentioned in this paper are all for the basic pattern of DMRS, that is, one DMRS is a basic pattern of DMRS, and the number of DMRS is the number of basic patterns of DMRS.
  • DMRS pattern which contains a time-frequency mapping resource of DMRS in a resource unit, wherein the DMRS pattern is composed of at least one DMRS basic pattern.
  • a DMRS pattern may include only one DMRS basic pattern, or may include multiple identical DMRS basic patterns, and may also include a plurality of different DMRS basic patterns, which are not limited in this embodiment of the present application.
  • a resource unit includes symbols consecutively numbered from 1 in the time domain, and subcarriers included in the frequency domain are numbered from 1.
  • the RB pair may include symbols 1 to 14 in the time domain and subcarriers 1 to 12 in the frequency domain.
  • the specific implementation is not limited to this. It should be noted that the above descriptions are for the purpose of facilitating the description of the technical solutions provided by the embodiments of the present application, and are not intended to limit the scope of the application.
  • the DMRS may be mapped to at least one symbol of the resource unit.
  • the at least one symbol may be a front symbol or a rear symbol of the resource unit, where the front symbol refers to a location in a resource unit.
  • the preceding symbol for example, may be a symbol corresponding to the symbol numbered 7 in Fig. 2 (i.e., the seventh symbol).
  • the front symbol it is specifically defined as which one of the sub-frames, which is not limited in this application.
  • the at least one symbol may be a rear symbol, wherein the rear symbol refers to a symbol after the symbol numbered 7 in FIG. The latter symbol is specifically defined as which one of the symbols in one subframe, which is not limited in this application.
  • the multiple symbols may be the same type of symbols, or may be different types of symbols, wherein the type includes a front symbol and a rear symbol.
  • the plurality of symbols are all front symbols; or some of the plurality of symbols are front symbols, and the other portions are rear symbols and the like.
  • the multiple symbols may be continuous or discrete. That is, the plurality of symbols may be adjacent symbols or non-adjacent symbols. It can be understood that, in the present application, part or all of the DMRS may be mapped to the front symbol, so that the receiving device can receive the DMRS more quickly than the prior art, so that data demodulation can be started, which can be satisfied. The need for fast demodulation of data in NR.
  • the present application schematically shows several mapping rules of DMRS and time domain resources, which can be specifically displayed by a DMRS pattern.
  • the above mapping rules can be implemented by formulas, tables or other means.
  • the terminal device can learn the time-frequency resource corresponding to the DMRS by using a rule that is agreed with the network device or information for indicating the time-frequency resource corresponding to the DMRS.
  • the network device can be controlled by the radio resource (radio resource control).
  • the RRC) signaling configures the DMRS pattern of the front symbol to the terminal device, and additionally configures the location of the DMRS located at the rear symbol by using downlink control information (DCI), and the network device may also indicate by using the indication information.
  • DCI downlink control information
  • the DMRS pattern corresponding to the number of the DMRSs is selected by the terminal device.
  • the network device may directly configure the DMRS pattern by using the RRC signaling, which is not limited in this embodiment of the present application.
  • the terminal device obtains the DMRS from the time-frequency resource, it can be implemented by using a method in the prior art.
  • the technical solution provided by the present application may be used in a single-carrier transmission scenario, and may also be used in a multi-carrier transmission scenario, and may be applied to an uplink transmission scenario or a downlink transmission scenario, and the technical solution provided by the present application. It can be applied to a broadcast or multicast physical downlink shared channel (broadcast/multicast PDSCH), or a physical broadcast channel (PBCH), and the like.
  • broadcast/multicast PDSCH broadcast/multicast PDSCH
  • PBCH physical broadcast channel
  • FIG. 4 shows a schematic flowchart 400 of a data transmission method of an embodiment of the present application.
  • the method 400 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.
  • the network device selects at least one target time domain resource from the plurality of candidate time domain resources, where the at least one target time domain resource is used to carry the DMRS;
  • the network device may select at least one target time domain resource from the plurality of candidate time domain resources according to the service requirement or the application scenario of the terminal device;
  • the network device sends first indication information to the terminal device, where the first indication information is used to indicate the at least one target time domain resource;
  • the terminal device receives the first indication information sent by the network device, and determines the at least one target time domain resource according to the first indication information.
  • the first indication information is carried in any one of the following signaling: radio resource control RRC signaling, downlink control information DCI, and media access control MAC layer control element CE signaling.
  • the network device may send the DMRS by using the target time domain resource; correspondingly, when the terminal device passes the target The domain resource receives the DMRS; or the terminal device sends the DMRS by using the target time domain resource; correspondingly, the network device receives the DMRS by using the target time domain resource, which is not limited in this embodiment of the present application.
  • the network device may select at least one target time domain resource from the plurality of candidate time domain resources, and send the first indication information to the terminal device to indicate the at least one target time domain resource, where the terminal device is configured according to the network device, Determining a target time domain resource carrying the DMRS, and then transmitting the DMRS through the target time domain resource and the network device.
  • the DMRS is carried in at least one resource unit. In each resource unit, the feature of the time domain resource occupied by the DMRS may refer to any of the drawings in FIG. 6 to FIG. 60 and the related description. The characteristics of domain resources.
  • the application scenario may be that the terminal device is currently in a high-speed moving scene, a medium-speed moving scene, or a low-speed moving scene according to a channel change condition of the terminal device, or may be a different frame structure, for example, current frame feedback, non-current
  • the frame feedback and the like are not limited in this embodiment of the present application.
  • the data transmission method in the embodiment of the present invention can flexibly configure the time domain resources used for transmitting the DMRS between the network device and the terminal device, thereby satisfying different service requirements of the terminal device.
  • the receiving device For ultra-reliable low-latency communication, the receiving device needs to be able to quickly interpret the data and perform fast feedback, which makes the DMRS must be placed in the front symbol of the resource unit, so that the receiving device can estimate the channel earlier, thereby enabling Real-time interpretation of the received data. It should be understood that the receiving device may be a network device or a terminal device.
  • the application scenario of the terminal device may be differentiated according to the moving speed of the terminal, and may be classified into a low-speed moving scenario (for example, less than 30 km/h) and a medium-speed moving scenario (for example, between 30 km/h and 120 km/h).
  • a low-speed moving scenario for example, less than 30 km/h
  • a medium-speed moving scenario for example, between 30 km/h and 120 km/h.
  • High-speed moving scenes eg between 120km/h-500km/h
  • ultra-high-speed moving scenes eg greater than 500km/h.
  • the channel changes rapidly in the time domain, which makes it impossible to accurately sample the high-speed channel only when the DMRS is placed in the front symbol of the resource unit. It is necessary to add a DMRS at the rear symbol of the resource unit in addition to placing the DMRS at the front symbol of the resource unit. It should be understood that the location of the DMRS directly affects the performance of the system. The later the DMRS is, the more accurate the channel estimation is, but the later the receiving device demodulates the data. On the contrary, the higher the DMRS is, the earlier the receiving device can demodulate. Data, but the channel estimation error is larger.
  • the DMRS needs to be placed in the front symbol of the resource unit; for the medium-speed mobile scenario, the DMRS needs to be placed in the front symbol of the resource unit, in the resource.
  • the rear symbol of the unit is placed with one DMRS basic pattern; for the high-speed moving scene, one or two DMRSs are placed in the rear symbol of the resource unit in addition to the DMRS in the front symbol of the resource unit; In the scenario, it is necessary to place 2 or 3 DMRSs in the rear symbol of the resource unit in addition to the DMRS placed in the front symbol of the resource unit.
  • the DMRS pattern and the moving speed of the terminal device in the embodiment of the present application, or the specific application scenario, may not have a binding relationship.
  • the frame structure can be divided into current frame feedback and non-current frame feedback
  • feedback information needs to be placed on the last few symbols of the resource unit (for example, the last 2 symbols or the last 3 symbols).
  • ACK/NACK therefore, the placement of the DMRS needs to avoid the last few symbols in the resource unit for placing feedback information.
  • the frame structure of the non-current frame feedback if the current frame does not need to feed back the transmission result of the current frame, nor does it need to feed back the transmission result of the resource unit that has been transmitted before, and the last few pieces of the resource unit for placing the feedback information.
  • the DMRS can be placed on the symbol, but the embodiment of the present application does not limit this.
  • the sending device may be a terminal device, and the receiving device may be a network device. If the technical solution is applied to the downlink transmission scenario, the sending device may be a network device, and the receiving device may be a terminal device.
  • the specific number of symbols of the DMRS basic pattern is not limited herein.
  • the specific number of symbols of the DMRS basic pattern may be 1 symbol or 2 symbols.
  • the DMRS may be placed in the corresponding time domain position by placing it forward or backward, and the forward or backward placement referred to here is the absolute of the DMRS port.
  • the port number is sorted.
  • the backward position means that the DMRS port is mapped from the time domain of the basic pattern to the time symbol of the base symbol in the order of small to large.
  • the forward placement is
  • the mapping of the DMRS is not limited to the DMRS port mapping sequence.
  • the mapping mode of the DMRS can be understood as the port mapping order of the DMRS.
  • the sending device and the receiving device can determine the target time domain resource that carries the DMRS in various manners, which is not limited in this embodiment of the present application.
  • the first indication information is specifically used to indicate a target DMRS pattern, where a time domain resource used to carry the DMRS in the target DMRS pattern is the at least one target time domain resource
  • the selecting, by the network device, the at least one target time domain resource from the plurality of candidate time domain resources includes: the network device selecting the target DMRS pattern from the plurality of candidate DMRS patterns.
  • the network device may select a target DMRS pattern from the preset multiple candidate DMRS patterns, where the target DMRS pattern is used to carry the time domain resource of the DMRS.
  • the network device may indicate the target DMRS pattern by the first indication information.
  • the network device may select the target DMRS pattern according to the service requirement or the application scenario of the terminal device, or select the target DMRS pattern according to the system parameter, that is, the specific frame structure, and may also combine the two to select, and the application is implemented. This example does not limit this.
  • the foregoing DMRS candidate time domain location set may be ⁇ 4, 7, 10, 13 ⁇ , ⁇ 4, 11 ⁇ , ⁇ 3, 8, 13 ⁇ , ⁇ 4, 7, 11, 14 ⁇ Any one or more of ⁇ 4, 5, 11, 12 ⁇ , although only a few specific examples are described in the following embodiments, it should be understood that the specific embodiment of the DMRS candidate time domain location set is The value is not limited.
  • the network device may determine the number of DMRSs required for the current transmission according to the service requirements or application scenarios of the terminal device, and select at least one DMRS pattern corresponding to the number of the DMRSs from the multiple candidate DMRS patterns, Finally, the target DMRS pattern is selected from the at least one DMRS pattern according to system parameters.
  • the different DMRS patterns in the at least one DMRS pattern may be bound to different system parameters, and the system parameters may be the number of PDCCHs, the system bandwidth, the frame structure, or the basic pattern of the DMRS, and the like, and may also be any other The parameters are not limited in this embodiment of the present application.
  • the basic pattern of the DMRS may specifically occupy 1 symbol or 2 symbols in the time domain.
  • the method before the sending, by the network device, the first indication information to the terminal device, the method further includes:
  • the network device sends second indication information to the terminal device, where the second indication information is used to indicate the multiple candidate DMRS patterns.
  • the network device may first configure a plurality of candidate DMRS patterns to the terminal device by using the second indication information, and then select, by using the first indication information, the plurality of candidate DMRS patterns.
  • the second indication information is carried in the RRC signaling, where the first indication information is carried in the DCI signaling.
  • the first indication information is specifically used to indicate at least one target time domain location corresponding to the at least one target time domain resource, and the network device selects at least one of the multiple candidate time domain resources.
  • a target time domain resource comprising: the network device selecting the at least one target time domain location from a set of candidate time domain locations, wherein the candidate time domain location set includes at least one candidate time domain location.
  • the network device may select at least one target time domain location from the preset candidate time domain location set, where the at least one target time domain location corresponds to the target time domain resource.
  • the network device may indicate the at least one target time domain resource by using the first indication information.
  • the network device may select the target DMRS pattern according to the service requirement or the application scenario of the terminal device, or select the at least one target time domain according to the system parameter, that is, the specific frame structure, and may also combine the two to select,
  • the application embodiment does not limit this.
  • the method before the sending, by the network device, the first indication information to the terminal device, the method further includes: sending, by the network device, third indication information, the third indication information, to the terminal device Used to indicate the candidate time domain location set.
  • the network device may first configure a candidate time domain location set to the terminal device by using the third indication information, and then select, by using the first indication information, the candidate time domain location set.
  • the third indication information is carried in the RRC signaling, where the first indication information is carried in the DCI signaling.
  • the network device configures the time domain location of the DMRS to be transmitted to the terminal device by using the signaling, but it should be understood that the terminal device can also configure the time domain location of the DMRS to be transmitted to the network device by using signaling, because the principle is similar. , will not repeat them here.
  • FIG. 5 shows a schematic flowchart 500 of another data transmission method in the embodiment of the present application.
  • the method 500 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.
  • the network device determines at least one target time domain resource that carries the DMRS.
  • the network device may determine, according to a service requirement or an application scenario of the terminal device, at least one target time domain resource that carries the DMRS;
  • the terminal device determines at least one target time domain resource that carries the DMRS.
  • the receiving device may determine, according to the service requirement or the application scenario of the terminal device, at least one target time domain resource that carries the DMRS;
  • the network device sends the DMRS by using the at least one target time domain resource; correspondingly, the terminal device receives the DMRS by using the at least one target time domain resource; or
  • the terminal device sends the DMRS by using the at least one target time domain resource; and correspondingly, the network device receives the DMRS by using the at least one target time domain resource.
  • the network device and the terminal device may determine the target time domain resource that carries the DMRS according to a preset rule, such as a service requirement or an application scenario of the terminal device, and use the target time domain resource to perform DMRS transmission.
  • the DMRS is carried in at least one resource unit.
  • the feature of the time domain resource occupied by the DMRS may refer to any of the drawings in FIG. 6 to FIG. 60 and the related description. The characteristics of domain resources.
  • the application scenario may be that the terminal device is currently in a high-speed moving scene, a medium-speed moving scene, or a low-speed moving scene according to a channel change condition of the terminal device, or may be a different frame structure, for example, current frame feedback, non-current
  • the frame feedback and the like are not limited in this embodiment of the present application.
  • the data transmission method in the embodiment of the present invention can flexibly configure the time domain resources used for transmitting the DMRS between the network device and the terminal device, thereby satisfying different service requirements of the terminal device.
  • the DMRS pattern and the moving speed of the terminal device or the specific application scenario may not have a binding relationship.
  • the network device and the terminal device can determine the target time domain resource that carries the DMRS in multiple manners, which is not limited in this embodiment of the present application.
  • the network device selects at least one target time domain resource from the plurality of candidate time domain resources, including: the network device selects the target DMRS pattern from multiple candidate DMRS patterns, The time domain resource used to carry the DMRS in the target DMRS pattern is the at least one target time domain resource.
  • the selecting, by the network device, the at least one target time domain resource from the plurality of candidate time domain resources including: the network device selecting the at least one target time domain location from the candidate time domain location set
  • the candidate time domain location set includes at least one candidate time domain location, and the at least one candidate time domain location corresponds to the at least one target time domain resource.
  • the specific manner in which the terminal device determines the target time domain resource may be the same in the manner in which the network device determines the target time domain resource, and details are not described herein again.
  • the DMRS pattern is configured by using a network device as a terminal device as an example.
  • the embodiment of the present application is not limited thereto.
  • the plurality of DMRS candidate time domain locations included in the set are respectively the number of the time domain resource, and the network device may select at least one time domain location from the set to place the DMRS, thereby
  • the mapped DMRS pattern can be applied to different scenarios, to different frame structures, and to meet different business requirements.
  • the DMRS candidate time domain location set is ⁇ 4, 7, 10, 13 ⁇
  • FIG. 6 to FIG. 13 are schematic diagrams of DMRS patterns in which the DMRS basic patterns occupy one symbol.
  • symbol 4, symbol 7, symbol 10, and symbol 13 are used to carry the DMRS.
  • the design can ensure uniform distribution of pilot density in the time domain and evenly interpolate in the time domain, which ensures channel estimation performance in ultra-high speed scenarios, and can be applied to the frame structure of 3 PDCCH.
  • symbol 4, symbol 10, and symbol 13 are used to carry a DMRS.
  • the design can transmit more data, and the channel interpolation can still be guaranteed in the high-speed scene, providing better channel estimation performance.
  • symbols 4 and 7 are used to carry the DMRS.
  • the design can satisfy the requirement of fast feedback in the mobile scenario, and the receiving device can receive the DMRS earlier, complete the channel estimation, interpret the received data in real time, and perform uplink feedback in the current frame.
  • symbols 4 and 13 are used to carry the DMRS.
  • This design can be effectively applied to medium-speed scenes, providing better channel estimation performance by interpolation in the time domain. In addition, it consumes less resources and can improve spectrum efficiency.
  • symbol 4 is used to carry the DMRS.
  • the design can be a 7-symbol frame structure, which can save overhead and can satisfy 3 PDCCH scenarios or 2 PDCCH uplink scenarios.
  • symbols 4 and 7 are used to carry the DMRS.
  • the design can satisfy the high-speed moving scene of the 7-symbol frame structure, and the channel estimation accuracy is ensured by interpolating the DMRS in the time domain.
  • symbol 4, symbol 7 and symbol 10 are used to carry the DMRS.
  • the design can be applied to high-speed scenes with PUCCH, and the DMRS avoids the possible time domain locations of the PUCCH while satisfying uniform interpolation in the time domain.
  • symbols 4 and 10 are used to carry DMRS.
  • the design overhead is small, and the spectrum efficiency can be improved, and the channel estimation performance of the general mobile scene can be satisfied.
  • the design can satisfy the frame structure of the PUCCH, and can shift the DMRS and the PUCCH.
  • 14 to 20 are schematic diagrams of DMRS patterns in which the DMRS basic patterns occupy 2 symbols.
  • symbol 4, symbol 5, symbol 7, symbol 8, symbol 10, symbol 11, symbol 13, and symbol 14 are used to carry the DMRS.
  • the design can meet the high-level transmission in ultra-high-speed scenes, such as 8 or 12 layers of data transmission requirements of 500 km/h.
  • symbol 4 symbol 5, symbol 10, symbol 11, symbol 13, and symbol 14 are used to carry the DMRS.
  • this design provides higher spectral efficiency and speed and performance requirements.
  • symbols 4 and 5 are used to carry DMRS.
  • the design can be applied to the downlink frame structure of the 3 PDCCH or the uplink frame structure of the 2 PDCCH, and can support the data transmission requirements of the 8 or 12 layers, and ensure the higher channel estimation performance in the low speed scenario.
  • symbol 4, symbol 5, symbol 13 and symbol 14 are used to carry the DMRS.
  • the design can be used for high-speed, multi-layer data transmission requirements.
  • the channel estimation accuracy can be improved.
  • symbols 4 and 5 are used to carry the DMRS.
  • the design is suitable for a 7-symbol frame structure and provides maximum data transfer requirements of 8 or 12 layers.
  • symbol 4, symbol 5, symbol 7, symbol 8, symbol 10, and symbol 11 are used to carry the DMRS.
  • This design can be used in the presence of a PUCCH frame structure to ensure high-performance system performance at high levels.
  • symbol 4, symbol 5, symbol 10, and symbol 11 are used to carry the DMRS.
  • the design can be applied to the frame structure of the PUCCH to meet the 3PDDCH scenario. In high and medium speed scenarios, the maximum data transmission requirement of 8 or 12 layers can be supported.
  • the DMRS is uniformly placed in the time domain to ensure the time. Estimated performance of fast-changing channels in a domain.
  • RS channel state information reference signal
  • SRS Sounding Reference Signal
  • the PDCCH may not exist, and may occupy the first 1-3 symbols in the resource unit, and the PUCCH used to carry the feedback information ACK/NACK may not exist or may occupy the resource. The last few symbols in the cell. Therefore, in a case where the DMRS pattern configured by the network device conflicts with the time domain location of other signaling or other RSs, the DMRS may not be placed on the corresponding time domain resource, frequency domain resource or time-frequency resource. That is, for different frame structures, the DMRS can avoid time domain resource placement occupied by other control signaling (such as PDCCH) or RS. Specifically, the entire time domain location occupied can be avoided, and the time domain can be avoided. Some of the occupied frequency domain locations.
  • the network device may pre-configure the mapping manner of the DMRS, and the mapping manner may be placed backwards or forwardly, which is not limited in this embodiment of the present application.
  • these maps may correspond to a mapping manner in which the DMRS candidate time domain location set ⁇ 4, 7, 10, 13 ⁇ is placed backwards, or may correspond to a DMRS candidate time domain location set ⁇ 5, 8
  • the DMRS candidate time domain location set may generate the same DMRS pattern in different mapping modes, which is not limited in this embodiment of the present application.
  • the DMRS candidate time domain location set is ⁇ 4, 8, 12 ⁇
  • FIG. 21 to FIG. 24 are schematic diagrams of DMRS patterns in which the basic patterns of the DMRS occupy one symbol. This embodiment can guarantee spectral efficiency in high speed scenarios and support different frame structures or service requirements with respect to a 4-symbol design that can support ultra-high speed scenes.
  • symbol 4, symbol 8 and symbol 12 are used to carry the DMRS.
  • This design can provide better channel estimation performance in high-speed scenes, and provides higher spectral efficiency than DMRS occupying 4 symbols.
  • the DMRS is evenly placed in the time domain to ensure channel estimation accuracy.
  • symbols 4 and 12 are used to carry the DMRS.
  • the design ensures that the time domain channel is obtained by interpolation by placing the DMRS on both sides in the time domain, so that the channel estimation accuracy can be ensured while providing higher spectral efficiency.
  • the last two symbol positions where upstream feedback may occur are avoided.
  • symbol 4 is used to carry the DMRS. This design can meet the maximum spectral efficiency in lower layer number transmission in the 3PDCCH scenario.
  • FIG. 25 to FIG. 27 are schematic diagrams of DMRS patterns in which the basic patterns of the DMRS occupy 2 symbols. This embodiment can guarantee spectral efficiency in high speed scenarios and support different frame structures or service requirements with respect to a 4-symbol design that can support very high speed scenes.
  • symbol 4, symbol 5, symbol 8, symbol 9, symbol 12, and symbol 13 are used to carry the DMRS.
  • the design can meet the business requirements of high-level numbers in high-speed scenarios, and the DMRS is evenly placed in the time domain to ensure channel estimation accuracy.
  • symbol 4, symbol 5, symbol 8 and symbol 9 are used to carry the DMRS.
  • the design can meet the business requirements of high-level numbers with fast feedback or PUCCH.
  • the DMRS is placed in the front part, and the receiving device can quickly estimate the channel as soon as possible for fast data interpretation.
  • symbol 4, symbol 5, symbol 12, and symbol 13 are used to carry the DMRS.
  • the design satisfies the high-level service requirements, and the DMRS is placed at both ends of the time-frequency to ensure channel interpolation and, in addition, provides higher spectral efficiency.
  • the blank position in the figure can be used to transmit data, and can be used to transmit other reference signals RS (for example, channel state information reference signal (CSI-RS), sounding reference signal (SRS), etc. It can also be used to transmit other control signaling, which is not limited in this embodiment of the present application.
  • RS channel state information reference signal
  • SRS sounding reference signal
  • FIG. 24 to FIG. 26 may correspond to the DMRS candidate time domain location set ⁇ 4, 8, 12 ⁇ , if the forward placement is used.
  • the mapping mode, FIG. 24 to FIG. 26, may correspond to the DMRS candidate time domain location set ⁇ 5, 9, 13 ⁇ .
  • 25 to FIG. 27 may also correspond to other DMRS candidate time domain location sets, for example, including a set of 4, 5, 8, 9, 12, 13 , which is not limited in this embodiment of the present application.
  • the present application is not limited to how to select the time domain location from the DMRS candidate time domain location set, and the specific mapping manner of placing the DMRS into the corresponding time domain resource according to the time domain location is not limited, as long as the embodiment of the present application is adopted.
  • the DMRS patterns shown should fall within the scope of this application.
  • the DMRS candidate time domain location set is ⁇ 5, 9, 13 ⁇
  • FIGS. 28 to 32 are schematic diagrams of DMRS patterns in which the DMRS basic patterns occupy one symbol.
  • This embodiment has the advantage of the above ⁇ 4, 8, 12 ⁇ scheme, that is, it can guarantee spectral efficiency in a high speed scene and support different frame structures or service requirements.
  • this embodiment also has the advantage that it can be used for the uplink transmission service of the 3PDCCH, where a guard interval of 1 symbol needs to be reserved for the system between the PDCCH and the uplink DMRS.
  • symbol 5 symbol 9 and symbol 13 are used to carry the DMRS.
  • This design can meet the channel estimation accuracy of the uplink high-speed scene by uniformly placing the DMRS in the time domain.
  • DMRS Downlink Reference Signal
  • symbol 5 is used to carry the DMRS.
  • This design can provide higher spectral efficiency.
  • it can be applied to flexible duplex services in the 3PDCCH scenario.
  • the downlink DMRS can be placed in the 4th symbol, and the uplink and downlink DMRS can ensure orthogonality through TDM.
  • symbol 5 is used to carry the DMRS.
  • the design is applicable to a 7-symbol frame structure, and can be applied to an uplink scenario of 3 PDCCH or a flexible duplex service of 7 symbols.
  • 33 to 35 are schematic diagrams of DMRS patterns in which the DMRS basic patterns occupy 2 symbols.
  • the 2 symbol design can support higher layer service requirements, such as simultaneous transmission of up to 8 or 12 orthogonal ports, and support more multi-users. pair.
  • symbol 5, symbol 6, symbol 9, symbol 10, symbol 13, and symbol 14 are used to carry the DMRS.
  • the blank position in the figure can be used to transmit data, and can be used to transmit other reference signals RS (for example, channel state information reference signal (CSI-RS), sounding reference signal (SRS), etc. It can also be used to transmit other control signaling, which is not limited in this embodiment of the present application.
  • RS channel state information reference signal
  • SRS sounding reference signal
  • FIG. 33 to FIG. 35 may correspond to the DMRS candidate time domain location set ⁇ 5, 9, 13 ⁇ , if the forward placement is used.
  • the mapping mode, FIG. 33 to FIG. 35 may correspond to the DMRS candidate time domain location set ⁇ 6, 10, 14 ⁇ .
  • the DMRS candidate time domain location set may be used in FIG. 33 to FIG. 35, which is not limited in this embodiment of the present application.
  • the present application is not limited to how to select the time domain location from the DMRS candidate time domain location set, and the specific mapping manner of placing the DMRS into the corresponding time domain resource according to the time domain location is not limited, as long as the embodiment of the present application is adopted.
  • the DMRS patterns shown should fall within the scope of this application.
  • DMRS candidate time domain location set includes different DMRS candidate time domain locations, and the network device may first select a DMRS candidate time domain location set from the multiple DMRS candidate time domain location sets, and then according to the foregoing.
  • the method selects at least one candidate time domain location from the selected DMRS candidate time domain location set, but the embodiment of the present application does not limit this.
  • the representation of the time domain location in the above set is to correspond to the number 1 to 14 of the time domain resource in the resource unit, and when the number of the domain resource changes, the time domain location in the collection
  • the representation can also be changed accordingly.
  • the number of the time domain resource may be represented by 0 to 13, in addition to the first symbol 1 to 7 and the rear symbol 1 to 7, or the front symbol 0 to 6 may be used.
  • the rear symbols 0 to 6 are used, and therefore, the time domain position in the set can adopt a corresponding representation method, which is not limited by the embodiment of the present application.
  • the above set may be indirectly represented by a formula or other means.
  • the DMRS basic pattern may have a scenario in which the subcarriers in the symbol are not fully occupied. At this time, part of the subcarriers corresponding to the symbol used to carry the DMRS may be used to transmit data, or may not be placed. The data is used for power boosting of the DMRS. Therefore, the “time domain resource carrying the DMRS” in the embodiment of the present application may include the case where all subcarriers on one symbol are occupied by the DMRS, and may also include A case where a part of subcarriers on one symbol is occupied by a DMRS.
  • the network device may select one target DMRS pattern to transmit DMRS, so that the mapped DMRS pattern can be applied to different scenarios, adapted to different frame structures, and meet different service requirements.
  • different service requirements or different application scenarios of the terminal device may correspond to different DMRS numbers, and the network device may select a corresponding DMRS pattern according to the number of DMRSs.
  • the network device may select a corresponding DMRS pattern according to the number of DMRSs.
  • a low-speed moving scenario only the DMRS needs to be placed in the front symbol of the resource unit, and there is no need to place the DMRS in the rear symbol of the resource unit;
  • the DMRS needs to be placed in the front symbol of the resource unit, The rear symbol of the resource unit is placed with one DMRS basic pattern;
  • the DMRS needs to be placed in the front symbol of the resource unit, and one or two DMRSs are placed in the rear symbol of the resource unit;
  • the DMRS pattern in the embodiment of the present application may not be bound to a specific scenario, and the network device may configure the target DMRS pattern for the terminal device according to other conditions or other preset rules. limited.
  • 36 to 41 show schematic diagrams of a set of preset candidate DMRS patterns.
  • the design can support the design requirements of up to 4 PDCCH, so that the DMRS and the control channel are completely avoided, the service demand for higher demand in the future, and a scenario requiring a large number of PDCCHs.
  • other RSs such as CSI-RS can be placed at the front end of the frame structure. .
  • symbol 6 is used to carry the DMRS. This design is suitable for low to medium speed scenes and provides high spectral efficiency.
  • symbols 6 and 11 are used to carry the DMRS.
  • the design is suitable for medium and high speed scenes, and the channel estimation accuracy can be ensured by uniformly placing the DMRS in the time domain.
  • symbol 6, symbol 11, and symbol 14 are used to carry the DMRS. This design is suitable for high speed scenes and provides better interpolation accuracy by discretely placing DMRS in the time domain.
  • symbol 6, symbol 9, and symbol 12 are used to carry the DMRS.
  • This design is suitable for high-speed scenes by placing the DMRS evenly in the time domain while avoiding possible upstream feedback signals.
  • symbol 6, symbol 7, symbol 11, and symbol 12 are used to carry the DMRS.
  • This design is suitable for the business needs of medium and high speed multi-orthogonal layers, and can avoid the possible upstream feedback symbols.
  • symbol 6, symbol 7, symbol 12, and symbol 13 are used to carry the DMRS.
  • the design is suitable for the service requirements of the medium and high-speed multi-orthogonal layer.
  • the blank position in the figure can be used to transmit data, and can be used to transmit other reference signals RS (for example, channel state information reference signal (CSI-RS), sounding reference signal (SRS), etc. It can also be used to transmit other control signaling, which is not limited in this embodiment of the present application.
  • RS channel state information reference signal
  • SRS sounding reference signal
  • the PDCCH may not exist, or may occupy the first 1-3 symbols in the resource unit, and the PUCCH for carrying the feedback information ACK/NACK may not exist, or may occupy the last few symbols in the resource unit. Therefore, in a case where the DMRS pattern configured by the network device conflicts with the time domain location of other signaling or other RSs, the DMRS may not be placed on the corresponding time domain resource, frequency domain resource or time-frequency resource. That is, for different frame structures, the DMRS can avoid time domain resource placement occupied by other control signaling (such as PDCCH) or RS. Specifically, the entire time domain location occupied can be avoided, and the time domain can be avoided. Some of the occupied frequency domain locations.
  • other control signaling such as PDCCH
  • the network device may first select FIG. 37, FIG. 40, and FIG. 41, and then select according to the frame structure. For example, the network device can determine whether the DMRS basic pattern occupies 1 symbol or 2 symbols. If the DMRS basic pattern occupies 1 symbol, the network device can directly use FIG. 37 as the target DMRS pattern, and if the DMRS basic pattern occupies 2 The network device can determine whether the feedback information needs to be transmitted. If necessary, the network device can select FIG. 40 as the target DMRS pattern. If not, the network device can be arbitrarily selected from FIG. 40 and FIG. 41, and can also be combined.
  • the network device can directly determine FIG. 40 as the target DMRS pattern.
  • the specific selection method of the target DMRS pattern is similar to the above, and details are not described herein again.
  • Figures 42 through 60 show schematic diagrams of other possible candidate DMRS patterns.
  • the following figure shows a DMRS pattern in which a resource unit includes 14 symbols as an example. It can be understood that the embodiment of the present application can also be applied to a 7-symbol or mini-slot frame structure, and the symbol sequence in which the DMRS is located does not change.
  • 42 to 54 are schematic diagrams showing a DMRS pattern in which the DMRS basic patterns occupy one symbol.
  • Fig. 44 symbols 4 and 9 are used to carry the DMRS.
  • the design has the advantage of fast demodulation.
  • the rear DMRS is placed in front, which can reduce the processing delay and ensure channel estimation in high-speed scenes.
  • symbol 3 symbol 8 and symbol 13 are used to carry the DMRS.
  • the design has the characteristics of uniform distribution of DMRS in the time domain, which can ensure the accuracy of channel estimation in medium and high speed.
  • symbol 3 symbol 7 and symbol 12 are used to carry the DMRS.
  • symbol 3 symbol 9 and symbol 14 are used to carry the DMRS.
  • symbol 4 symbol 9 and symbol 14 are used to carry the DMRS.
  • symbol 4, symbol 7, symbol 11 and symbol 14 are used to carry the DMRS.
  • the design can be applied to three PDCCH scenarios, ensuring uniform interpolation of the time domain channel under ultra-high speed, and obtaining better channel estimation accuracy.
  • FIG. 55 to FIG. 58 are schematic diagrams of DMRS patterns in which the DMRS basic patterns occupy 2 symbols.
  • symbol 4, symbol 5, symbol 9 and symbol 10 are used to carry the DMRS.
  • the design can ensure channel estimation accuracy in the scenario where there are three PDCCHs.
  • the distribution of DMRS can reduce the processing delay of the receiving end and meet the requirements of fast feedback.
  • symbol 4, symbol 5, symbol 11 and symbol 12 are used to carry the DMRS.
  • the design can obtain better channel estimation accuracy in a high-speed scenario in a scenario where there are three PDCCHs, and can be applied to a scenario in which an uplink ACK/NACK exists.
  • the blank position in the figure can be used to transmit data, and can be used to transmit other reference signals RS (for example, channel state information reference signal (CSI-RS), sounding reference signal (SRS), etc. It can also be used to transmit other control signaling, which is not limited in this embodiment of the present application.
  • RS channel state information reference signal
  • SRS sounding reference signal
  • any one or more of the DMRS patterns shown in FIG. 6 to FIG. 35 described above may be selected and bound to the number of DMRSs.
  • the previously given DMRS pattern is not repeatedly given below, but can still be used in the embodiment of the present application.
  • the pre-defined multiple candidate DMRS patterns may also have a pattern in which the DMRS occupies the symbol 2 or the symbol 3 in the front symbol, which is not enumerated in the embodiment of the present application.
  • the basic pattern of the DMRS located in the front symbol may be the same as or different from the basic pattern of the DMRS located in the rear symbol.
  • the DMRS basic pattern can occupy 2 symbols for the DMRS located in the front symbol, and the DMRS basic pattern can occupy 1 symbol for the DMRS located in the rear symbol, but this embodiment of the present application Not limited.
  • Figures 59 and 60 show schematic diagrams of two candidate DMRS patterns.
  • symbol 2, symbol 3, symbol 5, symbol 6, symbol 8, and symbol 12 are used to carry the DMRS.
  • symbol 4, symbol 5, symbol 8 and symbol 12 are used to carry the DMRS.
  • the network device can select according to the number of DMRSs of the front symbols.
  • multiple DMRSs in the time domain are usually required to ensure channel estimation accuracy, and multi-orthogonal port transmission requires more DMRS resources.
  • This scheme has the ability to transmit more DMRS ports and can guarantee more The beneficial effect of high spectral efficiency, using different DMRS basic patterns before and after, can ensure the accuracy of time domain interpolation and improve transmission efficiency.
  • the DMRS may be divided into a DMRS located in the front symbol and a DMRS located in the rear symbol; in this document, the DMRS located in the front symbol may be referred to as a first DMRS (first DMRS) or a pre-DMRS (front) -loaded DMRS (referred to as FL DMRS); DMRS located in the rear symbol can be called additional DMRS.
  • first DMRS first DMRS
  • FL DMRS pre-DMRS
  • FL DMRS pre-DMRS
  • the DMRS located in the rear symbol can be called additional DMRS.
  • the DMRS can be configured as follows.
  • the downlink, uplink, or different frame structure or transmission requirements are configured in the same manner by the same or independent signaling, where the configuration of the above (UL) DMRS is taken as an example:
  • the signaling for configuring the maximum number of symbols of the FL DMRS is referred to as fourth indication information.
  • the actual or actual number of symbols of the current FL DMRS may be indicated by using the DCI signaling, where the signaling may be dedicated DCI signaling, or may be used to indicate other information, such as a DMRS port that is simultaneously used to indicate the receiving end.
  • the number of the CDM group information, etc. may be similar to the DCI signaling of the DMRS port number of the LTE, and the real symbol number information of the FL DMRS is added thereto.
  • the current FL DMRS is indicated.
  • the signaling of the actual number of symbols is referred to as sixth indication information.
  • the number of symbols of the DMRS is 1, which may be referred to as a 1-symbol DMRS; the number of symbols of the DMRS is 2, which may be referred to as a 2-symbol DMRS; the number of symbols of the FL is 1, which is called a 1-symbol DMRS; FL The number of symbols is 2, which is called 2 symbol DMRS.
  • the number of additional DMRSs is configured by RRC signaling UL-DMRS-add-pos.
  • the specific DMRS and the DMRS can use the same DMRS pattern and port for specific transmission; the signaling can also be implemented by MAC CE, etc.
  • the signaling for configuring the number of additional DMRSs is referred to as fifth indication information;
  • the receiving end according to the maximum number of symbols of the FL DMRS, according to the number of additional DMRS, according to the actual number of symbols of the current FL DMRS indicated by the DCI or the number of real symbols, according to different data mapping modes (PUSCH/PDSCH mapping type)
  • the OFDM position of the additional DMRS is selected according to a downlink downlink physical channel (PDSCH) or a last uplink symbol position of a physical uplink shared channel (PUSCH).
  • PDSCH downlink downlink physical channel
  • PUSCH physical uplink shared channel
  • FL DMRS can be configured with 0, 1, 2 and 3 additional DMRS, that is, the number of additional DMRS is 0, 1, 2, 3 respectively; as shown in Table 1:
  • the number of additional DMRSs is 1, that is, the symbol positions of one additional DMRS can be: ⁇ 8th ⁇ , ⁇ 10th ⁇ , ⁇ 12th ⁇ , and the index number (index) in Table 1 is 7, 9, 11 Symbol position, the sequence number of the OFDM symbol in the table starts from 0;
  • the number of additional DMRSs is 2, and the symbol positions of the two additional DMRSs are: ⁇ 8th, 12th ⁇ , corresponding to the symbol positions of index numbers 7, 11 in Table 1, and ⁇ 7th, 10th ⁇ , corresponding to Table 1.
  • the index number is the symbol position of 6, 9, and the sequence number of the OFDM symbol in the table starts from 0;
  • the number of additional DMRSs is three, and the symbol positions of three additional DMRSs can be: ⁇ 6th, 9th, 12th ⁇ , corresponding to the symbol positions of index numbers 5, 8, and 11 in Table 1, and the sequence numbers of OFDM symbols in the table are from 0 starts counting. This scene supports the scene of the 3rd symbol of the FL DMRS.
  • FLDMRS can be configured with 0 and 1 additional DMRS
  • the number of additional DMRSs is 2, and the symbol positions of the two additional DMRSs are: ⁇ 9th-10th ⁇ , corresponding to the symbol position of index 8 in Table 2, and ⁇ 11th-12th ⁇ , corresponding to Table 2
  • the symbol position in the index number is 10.
  • the sender since the current 2-symbol FL DMRS shares the RRC parameter (DMRS-add-pos) with the number of additional DMRSs of the 1-symbol FL DMRS, when the RRC signaling indicates that the maximum number of symbols of the FL DMRS is 2 When -symbol, the sender will dynamically set the current FL DMRS to 1 symbol or 2 symbols through the sixth indication information, such as DCI. At this time, an indication error of the additional DMRS position will occur.
  • the sixth indication information such as DCI.
  • the solution provided is that the transmitting end indicates whether the number of symbols of the DMRS of the receiving end (FL) through the DCI signaling is 1-symbol or 2-symbol, and the receiving end can dynamically select according to the indication of the DCI.
  • the maximum number of symbols of the DMRS mentioned in this embodiment refers to the maximum number of symbols of the FL DMRS and the FL DMRS.
  • the number of real or actual symbols, so FL can be omitted or synonymously replaced in the description, such as "first", "pre-position” and so on.
  • the DMRS pattern, the actual number of symbols, the port mapping, and the multiplexing mode of the additional DMRS and the FL DMRS are exactly the same.
  • the configuration of the DMRS-add-pos can be restricted:
  • DMRS-add-pos can be configured with 0, 1, 2, 3.
  • DMRS-add-pos-2 independently indicates the number of additional DMRSs of the 2-symbol FL DMRS.
  • the receiving end passes the DMRS-add-pos. -2 determines the number of additional DMRS.
  • the receiving end determines the number of additional DMRS through DMRS-add-pos.
  • Corresponding additional DMRS symbol position when the transmitting end sends DCI signaling, indicating that the current or actual symbol number of the FL DMRS is 1 symbol DMRS, and the receiving end according to the symbol position of the additional DMRS corresponding to the 2-symbol in Table 2, Add 1 to the symbol position to obtain the additional DMRS symbol position of 1 symbol DMRS.
  • adding 1 to the symbol position with index number 8 in Table 2 to obtain the symbol position with index number 9 can be represented by ⁇ 10th ⁇ ; on the basis of the symbol position with index number 10 in Table 2 1 Get the symbol position with index number 11, which can be represented by ⁇ 12th ⁇ .
  • the column indicating the position of the additional DMRS symbol in Table 2 can be divided into two columns, which are (single-symbol DMRS) and (double-symbol DMRS), as shown in Table 3, of course, the single here.
  • -symbol DMRS can be represented by (1-symbol DMRS)
  • double-symbol DMRS can be represented by (2-symbol DMRS).
  • the receiving end may search for a specific additional DMRS symbol position according to the number of symbols according to a 1-symbol (single-symbol or one-symbol) or a 2-symbol (double-symbol or two-symbol) indicated by the DCI signaling.
  • this embodiment can solve the problem of how to determine the symbol position of the additional DMRS when the receiving end switches between the DMRS corresponding to the 2-symbol and the DMRS corresponding to the 1-symbol. Specifically, since the symbol positions of the additional DMRS corresponding to the current 1 symbol FL DMRS and the 2 symbol FL DMRS are respectively configured by two tables, once the RRC configuration FL DMRS is at most 2 symbols, the receiving end or the terminal at this time The symbol position of the additional DMRS can only be selected from the configuration table of the 2-symbol FL DMRS.
  • one way is to add 1 to the symbol position of the optional DMRS in the configuration table of the 2-symbol FL DMRS; the other is the configuration table of the FL DMRS in the original 2 symbol.
  • the table 3 can be written to the transmitting end and the receiving end when the system is initialized, or can be written to the transmitting end, and the transmitting end then notifies the receiving end by signaling.
  • the transmitting end is a network device or a base station
  • the receiving end is a terminal device.
  • the embodiment of the present application provides a network device for implementing the foregoing method
  • a processor configured to configure, by the terminal device, a maximum number of symbols of the first DMRS in the DMRS; the DMRS is carried on a time-frequency resource configured by the network device for the terminal device, and includes the first DMRS and the additional DMRS;
  • a transceiver configured to send fourth indication information to the terminal device, where the fourth indication information is used to indicate, to the terminal device, a maximum number of symbols of the first DMRS in the DMRS;
  • the transceiver is further configured to send the fifth indication information to the terminal device, where the fifth indication information is used to indicate, to the terminal device, the number of additional DMRSs in the DMRS;
  • the transceiver is further configured to send sixth indication information to the terminal device, where the sixth indication information is used to indicate, to the terminal device, the actual number of symbols of the first DMRS.
  • the fourth indication information or the fifth indication information is carried in any one of the following signaling: radio resource control RRC signaling, downlink control information DCI, and media access control MAC layer control element CE signaling.
  • the sixth indication information is carried in any one of the following signaling: downlink control information DCI and media access control MAC layer control element CE signaling.
  • the network device further includes:
  • a memory for storing demodulation reference signal DMRS configuration information; where the DMRS configuration information includes different number of additional DMRSs, and the symbol position of the additional DMRS corresponding to the number of symbols of the first DMRS is 1 The number of symbols of the first DMRS is the symbol position of the additional DMRS corresponding to 2.
  • the DMRS configuration information described herein is a representation form, that is, the above table 3; of course, the table 3 has other modifications, as long as it satisfies the category including the number of different additional DMRSs, the first DMRS is 1 symbol corresponding.
  • the symbol position of the additional DMRS which also includes the symbol position of the additional DMRS corresponding to the 2 symbol of the first DMRS, is in the protection scope of the embodiment of the present application.
  • the embodiment of the present application further provides a terminal device, including:
  • a transceiver configured to receive fourth indication information that is sent by the network device, where the fourth indication information is used to indicate a maximum number of symbols of the first DMRS in the DMRS, and the DMRS is carried in the network device as the terminal device Configuring the time-frequency resource, including the first DMRS and the additional DMRS;
  • the transceiver is further configured to receive fifth indication information that is sent by the network device, where the fifth indication information is used to indicate, to the terminal device, a number of additional DMRSs in the DMRS; the DMRS includes the First DMRS and additional DMRS;
  • the sixth indication information is used to indicate the actual number of symbols of the first DMRS
  • a processor configured to combine, according to the maximum number of symbols of the first DMRS, the actual number of symbols of the first DMRS, and the number of the additional DMRS, in combination with a last symbol position of the data transmitted in the time-frequency resource, The symbol position of the additional DMRS is determined.
  • the fourth indication information received by the terminal device indicates that the maximum number of symbols of the first DMRS is 2, and the fifth indication information indicates that the number of the additional DMRS is 1.
  • the sixth indication information indicates that the actual number of symbols of the first DMRS is 2, the symbol position of the additional DMRS corresponding to the number of symbols of the first DMRS is selected in the DMRS configuration information.
  • the DMRS configuration information described here is as shown in Table 2 or Table 3.
  • the fourth indication information received by the terminal device indicates that the maximum number of symbols of the first DMRS is 2, and the fifth indication information indicates that the number of the additional DMRS is 1.
  • the received sixth indication information indicates that the actual number of symbols of the first DMRS is 1, and the number of symbols of the first DMRS in the DMRS configuration information is 2, and the symbol position of the additional DMRS corresponding to the second DMRS is added. 1. Obtain a symbol position of the additional DMRS corresponding to the number of symbols of the first DMRS.
  • the DMRS configuration information described here is as shown in Table 2.
  • the terminal device may further include a memory for storing demodulation reference signal DMRS configuration information; the DMRS includes a first DMRS and an additional DMRS; and the DMRS configuration information is classified by a number of different additional DMRSs.
  • the symbol position of the additional DMRS corresponding to the number of symbols of the first DMRS is 1, and the symbol position of the additional DMRS corresponding to the number of symbols of the first DMRS is also included.
  • the DMRS configuration information described herein is a representation form of the above Table 3; of course, the Table 3 has other modifications as long as it satisfies the category including the number of different additional DMRSs, including the first DMRS as 1 symbol.
  • the symbol position of the corresponding additional DMRS which also includes the symbol position of the additional DMRS corresponding to the 2 symbol of the first DMRS, is in the protection scope of the embodiment of the present application.
  • the fourth indication information received by the terminal device indicates that the maximum number of symbols of the first DMRS is 2, and the fifth indication information indicates The number of the additional DMRSs is 1, and the received sixth indication information indicates that the number of actual symbols of the first DMRS is 1, and the number of the first DMRS symbols is 1 in the DMRS configuration information.
  • the symbol position of the attached DMRS indicates that the maximum number of symbols of the first DMRS is 2, and the fifth indication information indicates The number of the additional DMRSs is 1, and the received sixth indication information indicates that the number of actual symbols of the first DMRS is 1, and the number of the first DMRS symbols is 1 in the DMRS configuration information.
  • FIG. 61 shows a network device 6100 according to an embodiment of the present application.
  • the device 6100 includes:
  • the selecting unit 6110 is configured to select at least one target time domain resource from the plurality of candidate time domain resources, where the at least one target time domain resource is used to carry the DMRS;
  • the sending unit 6120 is configured to send first indication information to the terminal device, where the first indication information is used to indicate the at least one target time domain resource.
  • the data transmission device of the embodiment of the present invention can flexibly configure the time domain resources used for transmitting the DMRS between the network device and the terminal device, so as to meet different service requirements of the terminal device.
  • the first indication information is specifically used to indicate a target DMRS pattern, where a time domain resource used to carry the DMRS in the target DMRS pattern is the at least one target time domain resource, and the selecting unit 6110 is specific. For: selecting the target DMRS pattern from a plurality of candidate DMRS patterns.
  • the selecting unit 6110 is specifically configured to: determine the number of the DMRSs, and determine, according to the number of the DMRSs, at least one corresponding to the number of the DMRSs from the multiple candidate DMRS patterns. a DMRS pattern; the target DMRS pattern is selected from the at least one DMRS pattern according to system parameters.
  • the sending unit 6120 is further configured to: before the sending the first indication information to the terminal device, send the second indication information to the terminal device, where the second indication information is used to indicate the multiple Candidate DMRS pattern.
  • the first indication information is specifically used to indicate at least one target time domain location corresponding to the at least one target time domain resource
  • the selecting unit 6110 is specifically configured to: select the candidate from the candidate time domain location set. Describe at least one target time domain location, wherein the candidate time domain location set includes at least one candidate time domain location.
  • the sending unit 6120 is further configured to: before the sending the first indication information to the terminal device, send, to the terminal device, third indication information, where the third indication information is used to indicate the candidate time A collection of domain locations.
  • the first indication information is carried in any one of the following signaling: radio resource control RRC signaling, downlink control information DCI, and media access control MAC layer control element CE signaling.
  • the device 6100 herein is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (eg, a shared processor, a proprietary processor, or a group) for executing one or more software or firmware programs. Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • processor eg, a shared processor, a proprietary processor, or a group
  • memory merge logic, and/or other suitable components that support the described functionality.
  • the device 6100 may be specifically the network device in the foregoing embodiment, and the device 6100 may be used to perform various processes and/or steps corresponding to the network device in the foregoing method embodiment. To avoid repetition, we will not repeat them here.
  • FIG. 62 shows a terminal device 6200 according to an embodiment of the present application.
  • the device 6200 includes:
  • the receiving unit 6210 is configured to receive first indication information that is sent by the network device, where the first indication information is used to indicate at least one target time domain resource, the at least one target time domain resource is used to carry the DMRS, and the at least one The target time domain resource is selected by the network device from a plurality of candidate time domain resources;
  • the determining unit 6220 is configured to determine the at least one target time domain resource according to the first indication information.
  • the data transmission device of the embodiment of the present invention can flexibly configure the time domain resources used for transmitting the DMRS between the network device and the terminal device, so as to meet different service requirements of the terminal device.
  • the first indication information is specifically used to indicate a target DMRS pattern, where a time domain resource used to carry the DMRS in the target DMRS pattern is the at least one target time domain resource, and the target DMRS pattern And determining, by the network device, the at least one target time domain resource according to the target DMRS pattern.
  • the receiving unit 6210 is further configured to: before the first indication information sent by the receiving network device, receive second indication information sent by the network device, where the second indication information is used to indicate the Multiple candidate DMRS patterns.
  • the first indication information is specifically used to indicate at least one target time domain location corresponding to the at least one target time domain resource, where the at least one target time domain location is a candidate time domain location of the network device
  • the candidate time domain location set includes at least one candidate time domain location; the determining unit 6220 is specifically configured to: determine the at least one target time domain resource according to the at least one target time domain location.
  • the receiving unit 6210 is further configured to: before receiving the first indication information sent by the network device, receive third indication information that is sent by the network device, where the third indication information is used to indicate the A collection of candidate time domain locations.
  • the first indication information is carried in any one of the following signaling: radio resource control RRC signaling, downlink control information DCI, and media access control MAC layer control element CE signaling.
  • the device 6200 herein is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (eg, a shared processor, a proprietary processor, or a group) for executing one or more software or firmware programs. Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • processor eg, a shared processor, a proprietary processor, or a group
  • memory merge logic, and/or other suitable components that support the described functionality.
  • the device 6200 may be specifically the terminal device in the foregoing embodiment, and the device 6200 may be used to perform various processes and/or steps corresponding to the terminal device in the foregoing method embodiment. To avoid repetition, we will not repeat them here.
  • FIG. 63 shows another network device 6300 provided by an embodiment of the present application.
  • the device 6300 includes a processor 6310, a transceiver 6320, and a memory 6330.
  • the processor 6310, the transceiver 6320, and the memory 6330 communicate with each other through an internal connection path.
  • the memory 6330 is configured to store instructions, and the processor 6310 is configured to execute instructions stored in the memory 6330 to control the transceiver 6320 to send signals and / or receive signals.
  • the processor 6310 is configured to select at least one target time domain resource from the plurality of candidate time domain resources, where the at least one target time domain resource is used to carry the DMRS; the transceiver 6320 is configured to send the first indication to the terminal device. Information, the first indication information is used to indicate the at least one target time domain resource.
  • the processor 6310 and the memory 6330 described above may synthesize a processing device, and the processor 6310 is configured to execute the program code stored in the memory 6330 to implement the above functions.
  • the memory 6330 can also be integrated in the processor 6310 or independent of the processor 6310.
  • the network device 6300 may further include an antenna 6340, configured to send downlink data or downlink control signaling output by the transceiver 6320 by using a wireless signal.
  • the network device 6300 may be specifically the network device in the foregoing embodiment 200, and may be used to perform various steps and/or processes corresponding to the network device in the foregoing method embodiment 200.
  • the memory 6330 can include read only memory and random access memory and provides instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 6310 can be configured to execute instructions stored in the memory, and when the processor 6310 executes the instructions stored in the memory, the processor 6310 is configured to perform the various steps of the method embodiment corresponding to the network device described above and/or Or process.
  • FIG. 64 shows another terminal device 6400 provided by an embodiment of the present application.
  • the terminal device 6400 includes a processor 6401 and a transceiver 6402.
  • the terminal device 6400 further includes a memory 6403.
  • the processor 6402, the transceiver 6402 and the memory 6403 communicate with each other through an internal connection path for transferring control and/or data signals
  • the memory 6403 is for storing a computer program
  • the processor 6401 is configured to receive from the memory 6403
  • the computer program is called and run to control the transceiver 6402 to send and receive signals.
  • the processor 6401 When the program instruction stored in the memory 6403 is executed by the processor 6401, the processor 6401 is configured to receive, by the transceiver 6402, first indication information that is sent by the network device, where the first indication information is used to indicate at least one target time domain. a resource, the at least one target time domain resource is used to carry a DMRS, and the at least one target time domain resource is selected by the network device from a plurality of candidate time domain resources; and determining, according to the first indication information, Describe at least one target time domain resource.
  • the processor 6401 and the memory 6403 described above may synthesize a processing device, and the processor 6401 is configured to execute the program code stored in the memory 6403 to implement the above functions.
  • the memory 6403 may also be integrated in the processor 6401 or independent of the processor 6401.
  • the terminal device 6400 may further include an antenna 6404 for transmitting uplink data or uplink control signaling output by the transceiver 6402 by using a wireless signal.
  • the terminal device 6400 may be specifically the terminal device in the foregoing embodiment 200, and may be used to perform various steps and/or processes corresponding to the terminal device in the foregoing method embodiment 200.
  • the memory 6430 can include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 6410 can be configured to execute instructions stored in the memory, and when the processor 6410 executes the instructions stored in the memory, the processor 6410 is configured to perform the various steps of the method embodiment corresponding to the terminal device described above and/or Or process.
  • the processor 6401 described above may be configured to perform the actions implemented by the terminal as described in the foregoing method embodiments, and the transceiver 6402 may be configured to perform the actions of the terminal to transmit or transmit to the terminal device described in the foregoing method embodiments.
  • the transceiver 6402 may be configured to perform the actions of the terminal to transmit or transmit to the terminal device described in the foregoing method embodiments.
  • the terminal device 6400 described above may further include a power source 6406 for providing power to various devices or circuits in the terminal device 6400.
  • the terminal device 6400 may further include one or more of an input unit 6406, a display unit 6407, an audio circuit 6408, a camera 6409, a sensor 6410, and the like, the audio circuit.
  • an input unit 6406 may further include one or more of an input unit 6406, a display unit 6407, an audio circuit 6408, a camera 6409, a sensor 6410, and the like, the audio circuit.
  • a speaker 64082, a microphone 64084, and the like can also be included.
  • the processor of the foregoing network device 4500 and the terminal device 6400 may be a central processing unit (CPU), and the processor may also be other general-purpose processors and digital signal processors ( DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software units in the processor.
  • the software unit can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in a memory, and the processor executes instructions in the memory, in combination with hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the 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 objectives of the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present application may be in essence or part of the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

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

Abstract

La présente invention concerne des modes de réalisation d'un procédé de transmission de données, d'un dispositif réseau et d'un dispositif terminal. Le procédé comprend les étapes suivantes : un dispositif réseau sélectionne au moins une ressource de domaine temporel cible parmi une pluralité de ressources de domaine temporel candidates, la ou les ressources de domaine temporel cible étant utilisées pour acheminer un signal de référence de démodulation (DMRS) ; le dispositif réseau envoie les premières informations d'indication à un dispositif terminal, lesdites informations étant utilisées pour indiquer la ou les ressources de domaine temporel cible. Le procédé de transmission de données, le dispositif réseau et le dispositif terminal du mode de réalisation de la présente invention permettent une configuration flexible des ressources de domaine temporel pour transmettre un DMRS entre un dispositif réseau et un dispositif terminal, satisfaisant ainsi diverses exigences de service du dispositif terminal.
PCT/CN2018/093957 2017-07-17 2018-07-02 Procédé de transmission de données, dispositif réseau et dispositif terminal Ceased WO2019015468A1 (fr)

Priority Applications (3)

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EP18835276.9A EP3522644A4 (fr) 2017-07-17 2018-07-02 Procédé de transmission de données, dispositif réseau et dispositif terminal
CN201880041837.7A CN111052828B (zh) 2017-07-17 2018-07-02 数据传输方法、网络设备和终端设备
US16/432,525 US10938531B2 (en) 2017-07-17 2019-06-05 Data transmission method, network device, and terminal device

Applications Claiming Priority (4)

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CN201710582621.9 2017-07-17
CN201710582621 2017-07-17
CN201711199168.XA CN109274472B (zh) 2017-07-17 2017-11-26 数据传输方法、网络设备和终端设备
CN201711199168.X 2017-11-26

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