WO2018228522A1 - Procédé d'émission de signaux de référence, procédé de réception de signaux de référence et appareil de communication - Google Patents

Procédé d'émission de signaux de référence, procédé de réception de signaux de référence et appareil de communication Download PDF

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Publication number
WO2018228522A1
WO2018228522A1 PCT/CN2018/091447 CN2018091447W WO2018228522A1 WO 2018228522 A1 WO2018228522 A1 WO 2018228522A1 CN 2018091447 W CN2018091447 W CN 2018091447W WO 2018228522 A1 WO2018228522 A1 WO 2018228522A1
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WIPO (PCT)
Prior art keywords
time
frequency resource
reference signal
resource group
offset
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PCT/CN2018/091447
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English (en)
Chinese (zh)
Inventor
夏金环
吕永霞
张永平
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华为技术有限公司
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Priority claimed from CN201710910063.4A external-priority patent/CN109150387B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BR112019026840-5A priority Critical patent/BR112019026840A2/pt
Priority to EP18816854.6A priority patent/EP3627732A4/fr
Priority to JP2019569352A priority patent/JP7246327B2/ja
Publication of WO2018228522A1 publication Critical patent/WO2018228522A1/fr
Priority to US16/712,566 priority patent/US11239970B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received

Definitions

  • the present application relates to field communication and, more particularly, to a method and apparatus for transmitting a reference signal and a method and apparatus for receiving a reference signal.
  • the transmitting end device transmits the demodulation reference signal while transmitting the data
  • the receiving end device first performs channel estimation according to the demodulation reference signal, and further demodulates the data according to the result of the channel estimation.
  • the design of the reference signal is mainly for a service with a large amount of data, for example, an Evolved Mobile Broadband (eMBB) service, which has higher reliability requirements for data demodulation. Low (for example, 90%).
  • eMBB Evolved Mobile Broadband
  • the present application provides a method and apparatus for transmitting a reference signal and a method and apparatus for receiving a reference signal, which can meet the configuration requirements of a service with different reliability requirements for a reference signal.
  • a method for transmitting a reference signal includes: the network device transmitting configuration information first indication information to the terminal device, where the first indication information indicates at least two configuration information corresponding to the first demodulation reference signal
  • the first configuration information, the configuration information of the at least two configuration information includes at least one of the following parameters: a sequence used by the demodulation reference signal, and a time-frequency resource carrying the demodulation reference signal in a time-frequency resource group
  • the density, the antenna port associated with the demodulation reference signal, the location of the time-frequency resource carrying the demodulation reference signal, and the at least one parameter included in any two configuration information is different; the network device passes the first time according to the first configuration information.
  • the frequency resource group sends the first downlink information and the first demodulation reference signal to the terminal device, where the first downlink information includes first downlink data or first downlink control information, and the first demodulation reference The signal is used to demodulate the first downlink information.
  • the second aspect provides a method for receiving a reference signal, where the method includes: receiving, by the terminal device, the first indication information, where the first indication information is in the at least two configuration information corresponding to the first demodulation reference signal.
  • First configuration information each of the at least two configuration information includes at least one of a parameter: a sequence used by the demodulation reference signal, a density of a time-frequency resource carrying the demodulation reference signal in a time-frequency resource group, An antenna port associated with the demodulation reference signal, a location of the time-frequency resource carrying the demodulation reference signal, and at least one parameter between the two types of configuration information is different; the terminal device passes the first time-frequency according to the first configuration information.
  • the terminal device receives, by the network device, the first downlink information and the first demodulation reference signal, where the first downlink information includes the first downlink data or the first downlink control information; the terminal device is configured according to the first Demodulating the reference signal and demodulating the first downlink information.
  • the first indication information indicates the first configuration information of the at least two types of configuration information corresponding to the first demodulation reference signal, and the at least one parameter included in any two types of configuration information is different, so as to be used for demodulating data reference.
  • the signal corresponds to a plurality of configuration information, or the reference signal used for demodulating the control information corresponds to multiple configuration information, and in the actual service transmission, the network device can be selected to select one of the multiple configuration information and the reliability of the current service.
  • the matching configuration information is required to transmit the reference signal to meet the configuration requirements of the demodulation reference signal for services with different reliability requirements.
  • the first downlink information includes the first downlink control information
  • the first configuration information is determined according to an information format of the first downlink control information and a first mapping relationship, where the first mapping relationship is It is a mapping relationship between at least two information formats and the at least two configuration information.
  • the first downlink information includes the first downlink control information
  • the network device determines the first configuration information from the at least two configuration information corresponding to the first demodulation reference signal, including: the network device is configured according to Determining, by the information format and the first mapping relationship of the first downlink control information, the first configuration information, where the first mapping relationship is between the at least two information formats and the at least two configuration information Mapping relationship.
  • the mapping relationship between the multiple information formats and the multiple configuration information is obtained in advance, so that the network device can select the service that is currently transmitted according to the information format of the current control information to be transmitted.
  • the matching configuration information in turn, can improve the efficiency and achievability of determining the configuration information.
  • the first configuration information is determined according to the service type of the service corresponding to the first downlink information, and the second mapping relationship, where the second mapping relationship is at least two service types and the at least two configuration information.
  • the mapping relationship between them is determined according to the service type of the service corresponding to the first downlink information, and the second mapping relationship, where the second mapping relationship is at least two service types and the at least two configuration information. The mapping relationship between them.
  • the network device determines, according to the at least two types of configuration information corresponding to the first demodulation reference signal, the first configuration information, where the network device is configured according to the service type and the second mapping of the service corresponding to the first downlink information.
  • the relationship determines the first configuration information from the at least two types of configuration information, where the second mapping relationship is a mapping relationship between the at least two service types and the at least two types of configuration information.
  • the first downlink information includes the first downlink control information
  • the first configuration information is a control channel format (or aggregation level) and a first according to a downlink control channel that carries the first downlink control information.
  • the third mapping relationship is a mapping relationship between the at least two control channel formats (or aggregation levels) and the at least two configuration information.
  • the first downlink information includes the first downlink control information
  • the network device determines the first configuration information from the at least two configuration information corresponding to the first demodulation reference signal, including: the network device is configured according to The control channel format (or aggregation level) of the downlink control channel carrying the first downlink control information and the third mapping relationship determine the first configuration information from the at least two types of configuration information, where the third mapping relationship is at least two A mapping relationship between the control channel format (or aggregation level) and the at least two configuration information.
  • the first time-frequency resource group belongs to the first resource set
  • the first downlink information includes the first downlink control information
  • the first demodulation reference signal is further used to demodulate the second downlink data.
  • the second downlink data is data that is sent by the network device by using the second resource set
  • the second downlink data is data that is received by the terminal device from the network device by using the second resource set, where the second resource set and the second resource set
  • the set of resources is consecutive in the time domain, or the interval between the second resource set and the first resource set in the time domain is less than or equal to a first threshold
  • the second resource set and the first resource set are in the frequency domain Continuously, or the interval between the second resource set and the first resource set in the frequency domain is less than or equal to a second threshold.
  • the method further includes: the terminal device demodulating the second downlink data according to the first demodulation reference signal.
  • the first demodulation reference signal is obtained by performing precoding processing based on the first precoding matrix, and the method further includes: the network device performing the second downlink data according to the first precoding matrix. Precoding processing.
  • the second downlink data is specifically sent by the network device by using a third time-frequency resource group in the second resource set, where the third time-frequency resource group and the first time-frequency resource group are in the time domain. Continuously, or the interval between the third time-frequency resource group and the first time-frequency resource group in the time domain is less than or equal to a third threshold, and the third time-frequency resource group and the first time-frequency resource group are in frequency The interval in the domain is continuous, or the interval between the third time-frequency resource group and the first time-frequency resource group in the frequency domain is less than or equal to a fourth threshold.
  • the first time-frequency resource group belongs to the first resource set, the first resource set includes at least two time-frequency resource groups, the first downlink information includes the first downlink control information, and the method further include:
  • the network device sends a second demodulation reference signal and a third downlink data to the terminal device by using a second time-frequency resource group in the first resource set, where the second demodulation reference signal is used for the solution of the third downlink data. Tune.
  • the method further includes: receiving, by the terminal device, the second demodulation reference signal and the third downlink data from the network device by using the second time-frequency resource group in the first resource set; the terminal device according to the second solution The reference signal is demodulated for the third downlink data.
  • the terminal device receives the second demodulation reference signal and the third downlink data from the network device by using the second time-frequency resource group in the first resource set, where the terminal device: according to the first configuration information, Receiving the second demodulation reference signal from the network device by using the second time-frequency resource group in the first resource set; or the second device according to the second demodulation reference signal corresponding to the second demodulation reference signal And configured to receive the second demodulation reference signal from the network device by using the second time-frequency resource group in the first resource set.
  • the configuration information of the second demodulation reference signal in the second time-frequency resource group is the first configuration information.
  • the configuration information of the second demodulation reference signal in the second time-frequency resource group is the second configuration information of the at least two configuration information corresponding to the second demodulation reference signal.
  • the network device sends the first indication information to the terminal device, and correspondingly, the terminal device receives the first indication information from the network side device.
  • the first indication information is used to indicate configuration information used by the second demodulation reference signal in the second time-frequency resource group.
  • the at least two configuration information corresponding to the first demodulation reference signal further includes fifth configuration information, where the first density is less than the second density, and the first location is a partial location in the second location, where The first density is a density of a time-frequency resource of the bearer reference signal included in the first configuration information in a time-frequency resource group, and the time-frequency resource of the bearer reference signal included in the fifth configuration information is at the second density
  • the density of the time-frequency resource group, the first location is the location of the time-frequency resource of the bearer reference signal included in the first configuration information
  • the second location is the location of the time-frequency resource of the bearer reference signal included in the fifth configuration information.
  • the time-frequency resource corresponding to the first location is a subset of time-frequency resources corresponding to the second location.
  • intersection of the time-frequency resource corresponding to the first location and the time-frequency resource corresponding to the second location does not include 0.
  • the at least two configuration information corresponding to the first demodulation reference signal is in one-to-one correspondence with the at least two types of density, and the at least two configuration information corresponding to the first demodulation reference signal and the at least two locations are one by one.
  • the density corresponding to the third configuration information of the at least two configuration information corresponding to the first demodulation reference signal is smaller than the fourth configuration information of the at least two configuration information corresponding to the first demodulation reference signal.
  • the density, and at least part of the locations corresponding to the third configuration information belong to a location corresponding to the fourth configuration information.
  • the “density corresponding to the configuration information” refers to: “the density of the time-frequency resource carrying the demodulation reference signal in a time-frequency resource group” of the configuration information including (or indicating).
  • the “location corresponding to the configuration information” means that the configuration information includes (or indicates) the “position of the time-frequency resource carrying the demodulation reference signal”.
  • the first configuration information is the third configuration information or the fourth configuration information.
  • the method further includes: the network device sending the second indication information to the terminal device, where the second indication information is used to indicate that the first demodulation reference signal is used to demodulate the second downlink data.
  • the terminal device demodulates the second downlink data according to the first demodulation reference signal, where the terminal device receives the second indication information from the network device, where the second indication information is used to indicate the first demodulation reference
  • the signal is used to demodulate the second downlink data; the terminal device demodulates the second downlink data by using the first demodulation reference signal according to the second indication information.
  • the processing load of the terminal device can be reduced, and the reliability of the communication can be improved.
  • the first time-frequency resource group belongs to the first resource set, the first downlink information includes the first downlink control information, and the first resource set further includes a fourth time-frequency resource group, where the fourth time The frequency resource group is configured to carry a third demodulation reference signal, where the third demodulation reference signal is used to demodulate the fourth downlink data, where the fourth downlink data is carried in the third resource set.
  • the method further includes: when the fourth time-frequency resource group has an overlapping portion with the first time-frequency resource in the first time-frequency resource, the network device is configured according to the location of the fourth time-frequency resource group. And determining, by the preset offset, the fifth time-frequency resource group; the network device sends the third demodulation reference signal by using the fifth time-frequency resource group, where the first time-frequency resource is the first time-frequency resource A time-frequency resource for carrying the first demodulation reference signal in the resource group.
  • the method further includes: when the fourth time-frequency resource group has an overlapping portion with the first time-frequency resource in the first time-frequency resource group, the terminal device is configured according to the location of the fourth time-frequency resource group Determining, by the preset offset, a fifth time-frequency resource group; the terminal device receives the third demodulation reference signal from the network device by using the fifth time-frequency resource group, where the first time-frequency resource is A time-frequency resource for carrying the first demodulation reference signal in the first time-frequency resource group.
  • the fifth time-frequency resource group includes at least one second time-frequency resource and at least one third time-frequency resource, where the second time-frequency resource is not in the fourth time-frequency resource group a time-frequency resource in which the time-frequency resource is overlapped, and the third time-frequency resource is a time-frequency in which the time-frequency resource overlapping the first time-frequency resource in the fourth time-frequency resource group is offset by the preset offset
  • the time-frequency resource in the fifth time-frequency resource group is the time-frequency resource after each time-frequency resource in the fourth time-frequency resource group is offset by the preset offset.
  • the demodulation reference signal for demodulating the control information overlaps with the bearer resource of the demodulation reference signal used for demodulating the downlink data
  • the demodulation reference signal for carrying the downlink data is used according to the specified offset amount. Since the resources are shifted, the transmission of the demodulation reference signals of both the control information and the downlink data can be reliably realized, and the reliability of the communication can be improved.
  • the offset includes an offset in the time domain.
  • the offset based on the offset comprises shifting one or more symbols backwards in the time domain.
  • the offset comprises a frequency domain offset.
  • the offset based on the offset comprises shifting one or more REs in the high frequency direction or the low frequency direction in the frequency domain.
  • the method further includes: sending, by the network device, the third indication information to the terminal device, where the third indication information is used to indicate that the fourth downlink data is demodulated by the third demodulation reference signal.
  • the method further includes: the terminal device receiving, by the network device, third indication information, where the third indication information is used to indicate that the fourth downlink data is demodulated by the third demodulation reference signal;
  • the third indication information is used to demodulate the fourth downlink data by using the third demodulation reference signal.
  • the “preset offset” may mean that the offset may be determined according to a preset rule.
  • the “preset offset” may mean that the offset may be configured by the network device and indicate the terminal device.
  • the network device may semi-statically indicate the preset offset by using high layer signaling (such as SIB or RRC signaling).
  • high layer signaling such as SIB or RRC signaling
  • the network device can dynamically indicate the preset offset by physical layer signaling (the following line control information DCI).
  • a third aspect provides a method for transmitting a reference signal, where the method includes: the network device sends downlink control information and a demodulation reference signal to the terminal device by using the first resource set, where the demodulation reference signal is used to demodulate the downlink control information.
  • the network device sends downlink data to the terminal device through the second resource set, where the demodulation reference signal is further used to demodulate the downlink data.
  • a fourth aspect provides a method for receiving a reference signal, the method comprising: receiving, by a terminal device, downlink control information and a demodulation reference signal from a network device by using a first resource set; the terminal device receiving, by using the second resource set, the network device The second downlink data; the terminal device demodulates the downlink control information and the downlink data according to the first demodulation reference signal.
  • the second resource set is consecutive with the first resource set in the time domain, or the interval between the second resource set and the first resource set in the time domain is less than or equal to a first threshold, and the first The two resource sets are consecutive with the first resource set in the frequency domain, or the interval between the second resource set and the first resource set in the frequency domain is less than or equal to a second threshold.
  • the method for transmitting a reference signal it is possible to demodulate both control information and data based on the same reference signal, thereby reducing the occupation of resources by the reference signal, and improving communication efficiency.
  • the precoding matrix used for the precoding process of the downlink data is the same as the precoding matrix used for the precoding process for the demodulation reference signal (or the downlink control information).
  • a fifth aspect provides a method for transmitting a reference signal, where the method includes: determining, by the network device, a resource set, where the resource set is used to carry a demodulation reference signal and downlink information, where the downlink information is downlink control information or downlink data,
  • the demodulation reference signal is used to demodulate the downlink information, where the resource set includes a first time-frequency resource group and a second time-frequency resource group, where the first time-frequency resource group is a reserved time-frequency resource, and the second time
  • the frequency resource group is configured to carry the demodulation reference signal; when the first time-frequency resource group and the second time-frequency resource group have overlapping portions, the network device is configured according to the location of the second time-frequency resource group and the preset
  • the offset determines a third time-frequency resource group; the network device sends the demodulation reference signal by using the third time-frequency resource group.
  • the sixth aspect provides a method for receiving a reference signal, where the method includes: determining, by the terminal device, a resource set, where the resource set is used to carry a demodulation reference signal and downlink information, where the downlink information is downlink control information or downlink data,
  • the demodulation reference signal is used to demodulate the downlink information, where the resource set includes a first time-frequency resource group and a second time-frequency resource group, where the first time-frequency resource group is a reserved time-frequency resource, and the second time
  • the frequency resource group is configured to carry the demodulation reference signal; when the first time-frequency resource group and the second time-frequency resource group have overlapping portions, the terminal device is configured according to the location of the second time-frequency resource group and the preset
  • the offset determines a third time-frequency resource group; the terminal device receives the demodulation reference signal by using the third time-frequency resource group.
  • the resource of the demodulation reference signal for carrying the downlink information is offset according to a predetermined offset, thereby being reliably implemented
  • the transmission of the demodulation reference signal further improves the reliability of the communication.
  • the method further includes: the network device sending the indication information to the terminal device
  • the indication information is used to indicate that the first time-frequency resource group is a reserved time-frequency resource.
  • the terminal device determines the third time according to the location of the second time-frequency resource group and the preset offset.
  • the frequency resource group includes: the terminal device receives the indication information from the network device, where the indication information is used to indicate that the first time-frequency resource group is a reserved time-frequency resource; and the terminal device determines the first time according to the indication information. After the frequency resource is reserved for the time-frequency resource, when the first time-frequency resource group and the second time-frequency resource group have overlapping portions, determining, according to the location of the second time-frequency resource group and the preset offset, determining The third time-frequency resource group.
  • the reserved time-frequency resource may be a time-frequency resource that is determined by the terminal device not to carry the reference signal.
  • the reserved time-frequency resource may refer to a time-frequency resource that is not used by the network device to send or receive.
  • the “preset offset” may mean that the offset may be determined according to a preset rule.
  • the “preset offset” may mean that the offset may be configured by the network device and indicate the terminal device.
  • the network device may semi-statically indicate the preset offset by using high layer signaling (such as SIB or RRC signaling).
  • high layer signaling such as SIB or RRC signaling
  • the network device can dynamically indicate the offset indicating the preset by physical layer signaling (the following line control information DCI).
  • the one resource set includes multiple control channel units CCE.
  • Each of the control channel units includes at least one resource unit group REG or a physical resource block PRB.
  • one resource set includes multiple resource unit groups REG.
  • one resource set includes multiple physical resource blocks PRB.
  • one time-frequency resource group is one or more resource unit groups REG.
  • the first resource set is a control resource set CORESET.
  • the first resource set occupies at least one physical resource block PRB group.
  • the first resource set and the second resource set belong to the same PRB group.
  • the PRB group occupied by the first resource set and the PRB group occupied by the second resource set are consecutive in the frequency domain, for example, the first resource set
  • the occupied PRB group and the PRB group occupied by the second resource set are adjacent or have overlapping portions in the frequency domain.
  • the interval between the PRB group occupied by the first resource set and the PRB group occupied by the second resource set in the frequency domain is less than or equal to a preset frequency. Domain threshold.
  • the PRB group occupied by the first resource set and the PRB group occupied by the second resource set are consecutive in the time domain, for example, the first resource set.
  • the occupied PRB group and the PRB group occupied by the second resource set are adjacent or have overlapping portions in the time domain.
  • the interval between the PRB group occupied by the first resource set and the PRB group occupied by the second resource set in the time domain is less than or equal to a preset time. Domain threshold.
  • the first time-frequency resource group and the third time-frequency resource group occupy different symbols in the time domain, and occupy the same sub-carrier in the frequency domain.
  • the interval between the first time-frequency resource group and the symbol occupied by the third time-frequency resource group in the time domain is less than or equal to a predetermined time threshold, for example, the first time-frequency resource group and the third time The symbols occupied by the frequency resource group in the time domain are adjacent.
  • the first time-frequency resource group and the third time-frequency resource group occupy the same symbol in the time domain, and occupy different sub-carriers in the frequency domain.
  • the first time-frequency resource group is adjacent to or has an overlapping portion of the sub-carriers occupied by the third time-frequency resource group in the frequency domain.
  • the method when the first demodulation reference signal is further used for demodulation of the second downlink data, the method further includes: the network device prohibiting the second resource set A reference signal for demodulating the second downlink data is transmitted.
  • the method further includes: the network device prohibiting transmitting, by the third time-frequency resource group, a reference signal for demodulating the second downlink data.
  • a seventh aspect provides a method for transmitting a reference signal, the method comprising: the network device transmitting downlink control information and a first demodulation reference signal to a terminal device by using a first time-frequency resource group in the resource set, the first demodulation The reference signal is used to demodulate the downlink control information, where the configuration information of the first demodulation reference signal is the first configuration information of the at least two configuration information, and each of the at least two configuration information includes at least one of the following Parameters: a sequence used for demodulating the reference signal, a density of a time-frequency resource carrying the demodulation reference signal in a time-frequency resource group, an antenna port associated with the demodulation reference signal, and a position of a time-frequency resource carrying the demodulation reference signal, And the at least one parameter included in any two types of configuration information is different; the network device sends the second demodulation reference signal and the downlink data to the terminal device by using the second time-frequency resource group in the resource set, the second demodulation reference signal Used to de
  • the configuration information used by the second demodulation reference signal in the second time-frequency resource group is the first configuration information.
  • the configuration information used by the second demodulation and demodulation reference signal in the second time-frequency resource group is the second configuration information of the at least two configuration information.
  • the network device sends, to the terminal device, first indication information, where the first indication information is used to indicate configuration information used by the second demodulation reference signal in the second time-frequency resource group.
  • the remaining time-frequency resource group can be passed.
  • the data is transmitted, and the data and the control information are demodulated based on different reference signals, and demodulation of both data and control information can be ensured, and resource utilization efficiency can be improved.
  • the eighth aspect provides a method for receiving a reference signal, where the method includes: receiving, by a terminal device, downlink control information and a first demodulation reference signal from a network device by using a first time-frequency resource group in a resource set, where the terminal device passes the The second time-frequency resource group in the resource set receives the second demodulation reference signal and the downlink data from the network device, where the configuration information of the first demodulation reference signal is the first configuration information in the at least two configuration information,
  • Each of the at least two configuration information includes at least one of the following: a sequence used by the demodulation reference signal, a density of a time-frequency resource carrying the demodulation reference signal in a time-frequency resource group, and a demodulation reference signal correlation.
  • the antenna port, the location of the time-frequency resource carrying the demodulation reference signal, and the at least one parameter included in any two types of configuration information is different; the terminal device demodulates the downlink control information according to the first demodulation reference signal, according to The second demodulation reference signal demodulates the second downlink data.
  • the configuration information used by the second demodulation reference signal in the second time-frequency resource group is the first configuration information.
  • the configuration information used by the second demodulation reference signal in the second time-frequency resource group is the second configuration information of the at least two configuration information.
  • the terminal device receives the first indication information sent by the network device, where the first indication information is used to indicate configuration information used by the second demodulation reference signal in the second time-frequency resource group.
  • the first demodulation reference signal and the second demodulation reference signal are processed by the same precoding matrix.
  • the downlink control information and the downlink data are processed by using the same precoding matrix.
  • the first demodulation reference signal and the second demodulation reference signal are processed by the same precoding matrix.
  • an apparatus for transmitting a reference signal comprising means for performing the steps of any of the first, third, fifth, and seventh aspects above and embodiments thereof.
  • the device comprises a chip or circuit, such as a chip or circuit that can be disposed within a network device.
  • the device is a network device.
  • an apparatus for receiving a reference signal comprising means for performing the steps of any of the second, fourth, sixth and eighth aspects above and embodiments thereof.
  • the device comprises a chip or circuit, such as a chip or circuit that can be disposed within the terminal device.
  • the device is a terminal device.
  • a communication device comprising a memory and a processor for storing a computer program for calling and running the computer program from a memory, such that the communication device performs the first aspect to the first Any of the six aspects and methods of the embodiments thereof.
  • a chip system comprising a memory and a processor for storing a computer program for calling and running the computer program from the memory such that the communication device on which the chip system is installed performs The method of any of the above first to sixth aspects and embodiments thereof.
  • a computer program product comprising: computer program code, when the computer program code is communicated by a communication unit (eg, a network device or a terminal device), a processing unit or a transceiver, The processor, when executed, causes the communication device to perform the method of any of the first to sixth aspects above and embodiments thereof.
  • a communication unit eg, a network device or a terminal device
  • the processor when executed, causes the communication device to perform the method of any of the first to sixth aspects above and embodiments thereof.
  • a fourteenth aspect there is provided a computer readable storage medium storing a program causing a communication device (eg, a network device or a terminal device) to perform the above-described first to sixth aspects Any of the aspects and methods thereof.
  • a communication device eg, a network device or a terminal device
  • the method and apparatus for transmitting a reference signal and the method and apparatus for receiving a reference signal according to an embodiment of the present application can flexibly implement a transmission process of a reference signal, and can meet requirements of a service with different reliability requirements for a reference signal.
  • FIG. 1 is a schematic diagram showing an example of a communication system according to an embodiment of the present application.
  • FIG. 2 is a schematic interaction diagram of an example of a transmission process of a reference signal according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of the density and position of a reference signal in an embodiment of the present application.
  • FIG. 4 is a schematic diagram showing an example of resource distribution in an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another example of resource distribution in the embodiment of the present application.
  • FIG. 6 is a schematic diagram of still another example of resource distribution in the embodiment of the present application.
  • FIG. 7 is a schematic diagram of still another example of resource distribution in the embodiment of the present application.
  • FIG. 8 is a schematic diagram of still another example of resource distribution in the embodiment of the present application.
  • FIG. 9 is a schematic interaction diagram of another example of a transmission process of a reference signal according to an embodiment of the present application.
  • FIG. 10 is a schematic interaction diagram of still another example of a transmission process of a reference signal according to an embodiment of the present application.
  • FIG. 11 is a schematic interaction diagram of still another example of a transmission process of a reference signal according to an embodiment of the present application.
  • FIG. 12 is a schematic block diagram showing an example of an apparatus for transmitting a reference signal according to an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of another example of an apparatus for receiving a reference signal according to an embodiment of the present application.
  • GSM global system for mobile communications
  • 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
  • 5G future fifth generation
  • 5G fifth generation
  • NR new radio
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • Embodiments of the present application describe various embodiments in connection with a network device and a terminal device, where:
  • a terminal device may also be called a user equipment (User Equipment, UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, and a user.
  • Agent or user device can be a station in the WLAN (STAION, ST), which can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, and a personal digital processing.
  • WLAN STAION, ST
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • handheld device with wireless communication capabilities computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, and next-generation communication system, for example, a terminal device in a 5G network or Terminal equipment in the future evolution of the Public Land Mobile Network (PLMN) network.
  • PLMN Public Land Mobile Network
  • the terminal device may also be a wearable device.
  • a wearable device which can also be called a wearable smart device, is a general term for applying wearable technology to intelligently design and wear wearable devices such as glasses, gloves, watches, clothing, and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are more than just a hardware device, but they also implement powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-size, non-reliable smartphones for full or partial functions, such as smart watches or smart glasses, and focus on only one type of application, and need to work with other devices such as smartphones. Use, such as various smart bracelets for smart signs monitoring, smart jewelry, etc.
  • the network device may be a device for communicating with the mobile device, such as a network device, and the network device may be an access point (AP) in the WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, It may be a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or an access point, or an in-vehicle device, a wearable device, and a future 5G network.
  • AP access point
  • BTS Base Transceiver Station
  • NodeB NodeB
  • NB evolved base station
  • LTE Long Term Evolutional Node B, eNB or eNodeB
  • Network equipment or network equipment in a future evolved PLMN network may be a device for communicating with the mobile device, such as a network device, and the network device may be an access point (AP) in the WLAN, a base station (Base
  • the network device provides a service for the cell
  • the terminal device communicates with the network device by using a transmission resource (for example, a frequency domain resource, or a spectrum resource) used by the cell
  • a transmission resource for example, a frequency domain resource, or a spectrum resource
  • the cell may be a network device.
  • a cell corresponding to a cell may belong to a macro base station, or may belong to a base station corresponding to a small cell, where the small cell may include: a metro cell, a micro cell, and a pico cell. (Pico cell), femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • multiple carriers can work at the same frequency on the carrier in the LTE system or the 5G system.
  • the concept of the carrier and the cell can be considered to be equivalent.
  • CA carrier aggregation
  • the concept of the carrier and the cell can be considered to be equivalent, for example, the UE accessing one carrier and accessing one cell are equivalent.
  • the method and apparatus provided by the embodiments of the present application may be applied to a terminal device or a network device, where the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also referred to as main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system.
  • the application layer includes applications such as browsers, contacts, word processing software, and instant messaging software.
  • the specific structure of the execution body of the method provided by the embodiment of the present application is not particularly limited as long as the program of the code of the method provided by the embodiment of the present application can be run by using the program according to the present application.
  • the method can be communicated.
  • the execution body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a function module that can call a program and execute a program in the terminal device or the network device.
  • the term "article of manufacture” as used in this application encompasses a computer program accessible from any computer-readable device, carrier, or media.
  • the computer readable medium may include, but is not limited to, a magnetic storage device (eg, a hard disk, a floppy disk, or a magnetic tape, etc.), such as a compact disc (CD), a digital versatile disc (Digital Versatile Disc, DVD). Etc.), smart cards and flash memory devices (eg, Erasable Programmable Read-Only Memory (EPROM), cards, sticks or key drivers, etc.).
  • various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, without limitation, a wireless channel and various other mediums capable of storing, containing, and/or carrying instructions and/or data.
  • FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application.
  • the communication system 100 includes a network device 102, which may include one antenna or multiple antennas such as antennas 104, 106, 108, 110, 112, and 114.
  • 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 multiple components related to signal transmission and reception (eg, processor, modulator, multiplexer) , demodulator, demultiplexer or antenna, etc.).
  • Network device 102 can communicate with a plurality of terminal devices, such as 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 terminal device 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 a forward link (also referred to as downlink) 118 and through the reverse link (also Information referred to as uplink 120 receives information from terminal device 116.
  • 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 can use a different frequency band than reverse link 120, and forward link 124 can be used differently than reverse link 126. Frequency band.
  • FDD Frequency Division Duplex
  • the forward link 118 and the reverse link 120 can use a common frequency band, a forward link 124, and a reverse link.
  • Link 126 can use a common frequency band.
  • Each antenna (or set of antennas consisting of multiple 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 network device can transmit signals to all of the terminal devices in its corresponding sector through a single antenna or multiple antenna transmit diversity.
  • the transmit antenna of network device 102 may also utilize beamforming to improve the signal to noise ratio of forward links 118 and 124.
  • the network device 102 utilizes beamforming to transmit signals to the randomly dispersed terminal devices 116 and 122 in the associated coverage area, as compared to the manner in which the network device transmits signals to all of its terminal devices through single antenna or multi-antenna transmit diversity, Mobile devices in neighboring cells 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 (eg, generate, receive from other communication devices, or store in memory, etc.) a certain number of data bits to be transmitted over the channel to the wireless communication receiving device.
  • Such data bits may be included in a transport block (or multiple transport blocks) of data that may be segmented to produce multiple code blocks.
  • the communication system 100 can be a PLMN network or a D2D network or an M2M network or other network.
  • FIG. 1 is only a simplified schematic diagram of an example, and other network devices may also be included in the network, which are not shown in FIG.
  • FIG. 2 is a schematic interaction diagram of a method 200 for transmitting and receiving a reference signal according to an embodiment of the present application.
  • a communication system e.g., communication system 100 described above
  • the reference signal may be used for channel measurement, and then used for demodulation.
  • the reference signal in the embodiment of the present application may include a Demodulation Reference Signal (DMRS). .
  • DMRS Demodulation Reference Signal
  • the at least two types of reference signals include: a reference signal for demodulating control information (or control channel) (hereinafter, referred to as reference signal #1 for ease of understanding and distinction), and, by way of example and not limitation
  • the control information may include Downlink Control Information (DCI), and the control channel may include a Physical Downlink Control Channel (PDCCH).
  • DCI Downlink Control Information
  • PDCH Physical Downlink Control Channel
  • the at least two types of reference signals include: a reference signal for demodulating data (or a data channel) (hereinafter, referred to as reference signal #2 for ease of understanding and distinction), and, as an example,
  • the data may include downlink data
  • the data channel may include a Physical Downlink Shared Channel (PDSCH).
  • PDSCH Physical Downlink Shared Channel
  • reference signal as a reference signal for channel measurement or channel estimation is merely exemplary, and should not be construed as limiting the embodiments of the present application. This application does not exclude the use of other in existing or future protocols. The name replaces the reference signal to achieve its possible function.
  • the reference signal of the at least one type of the at least two types of reference signals corresponds to at least two types of configuration information.
  • the reference signal #1 may have two or more types of configuration information
  • / or the above reference signal #2 may have two or more types of configuration information.
  • configuration information is an example of a general term of various parameters described below, and the present application is not particularly limited.
  • configuration information may also be referred to as “mode”.
  • the “configuration information” may include one or more of the following parameters.
  • Density specifically, the density of the time-frequency resource carrying the reference signal in a time-frequency resource group
  • each time-frequency resource group may include at least two time-frequency resources.
  • the time-frequency resource may be a resource element (Resource Element, RE).
  • the time-frequency resource group may be a Resource Element Group (REG).
  • the “density” may also be referred to as a reference signal density, and may refer to a time-frequency resource (eg, RE) used to carry a reference signal in a time-frequency resource group (eg, REG). proportion.
  • a time-frequency resource eg, RE
  • REG time-frequency resource group
  • B represents the number of time-frequency resources (eg, REs) carrying reference signals in a time-frequency resource group (eg, REG)
  • P represents the number of all time-frequency resources included in the time-frequency resource group.
  • time-frequency resources listed above are merely exemplary descriptions, and the present application is not limited thereto. Any one of the technical solutions in the art may define the time-frequency resources in arbitrary units as needed, and correspondingly, the times listed above.
  • the elements included in the frequency resource group may also define time-frequency resources in any form.
  • the time-frequency resource group may be defined as a time-frequency resource corresponding to a predetermined number of symbols in the time domain and corresponding to a predetermined number of sub-carriers in the frequency domain.
  • the reference signal density may also refer to a ratio of subcarriers carrying the reference signal in all subcarriers included in the time-frequency resource group in one time-frequency resource group.
  • the reference signal density may also refer to a ratio of symbols carrying the reference signal in all symbols included in the time-frequency resource group in a time-frequency resource group.
  • the difference between the parameters of the two types of configuration information may be: the reference signal density corresponding to one of the two types of configuration information is different from the reference signal density corresponding to the other of the two types of configuration information.
  • FIG. 3 shows a schematic diagram of an example of possible reference signal densities of an embodiment of the present application.
  • the number of REs carrying the reference signal is 4,
  • Parameter B Location (specifically, the location of the time-frequency resource carrying the reference signal in a time-frequency resource group)
  • the “location” may also be referred to as a reference signal location, and may refer to a time-frequency resource (eg, RE) used to carry a reference signal in a time-frequency resource group (eg, REG).
  • a time-frequency resource eg, RE
  • the location in the time-frequency resource is similar to the description of the "density".
  • a detailed description thereof will be omitted.
  • the time-frequency resource group may be defined as corresponding to a predetermined number of symbols in the time domain, corresponding to the frequency domain.
  • the reference signal location may also refer to a frequency domain location of all subcarriers included in the time-frequency resource group in a time-frequency resource group.
  • the reference signal density may also refer to a time domain position of a symbol carrying the reference signal in all symbols included in the time-frequency resource group in a time-frequency resource group.
  • the parameter differences of the two types of configuration information may indicate that the reference signal position corresponding to one of the two types of configuration information is different from the reference signal position corresponding to the other of the two types of configuration information.
  • FIG. 3 shows a schematic diagram of an example of possible reference signal locations for an embodiment of the present application.
  • the position of the reference signal may be different between any two configuration information having different densities, for example, any configuration information of the configuration information a and the configuration information b.
  • the reference signal position corresponding to the density (1/3) may be different from the reference signal position corresponding to any of the configuration information d, the configuration information c, the configuration information e, and the configuration information f (density is 1/2). .
  • the position of the reference signal may be different between two configuration information having the same density, for example, the reference signal position corresponding to the configuration information a and the configuration information b (density of 1/3). Can be different.
  • the reference signal positions corresponding to any two of the configuration information d, the configuration information c, the configuration information e, and the configuration information f may be different.
  • a part of the reference signal positions corresponding to the less dense configuration information may belong to The reference signal position corresponding to the denser configuration information (or the time-frequency resource corresponding to the reference signal position).
  • the partial reference signal position in the reference signal position corresponding to the configuration information a may belong to the reference signal position corresponding to the configuration information d or the configuration information c.
  • the partial reference signal position in the reference signal position corresponding to the configuration information d may belong to the reference signal position corresponding to the configuration information e or the configuration information f.
  • the reference signal position corresponding to the less dense configuration information may also be a subset of the reference signal locations corresponding to the denser configuration information.
  • Parameter C Sequence (specifically, the sequence used by the reference signal)
  • a “sequence” may also be referred to as a reference signal sequence, and may refer to a sequence used by a reference signal.
  • the sequence used by the reference signal may include a pseudo-noise (PN) sequence.
  • PN pseudo-noise
  • the reference signal can be calculated by using the following formula:
  • n' s n s .
  • the form presented is a complex form of the PN sequence obtained by modulation.
  • c init_1 and c init_3 for determining the sequence of the reference signal on a symbol c init_2 reference signal sequence for determining a unit of time (e.g., subframes) on.
  • h denotes the number of reference signals carried in each PRB, or h denotes the number of resources (eg, REs) of reference signals used for bearer in each PRB.
  • h r ⁇ h′
  • h′ represents the number of reference signals carried in each PRB
  • h′ represents a resource of a reference signal used for bearer in each PRB (for example, The number of RE).
  • the symbol may be an orthogonal frequency division multiplexing (OFDM) symbol, or may be a symbol for indicating a time unit defined in a future protocol, which is not used in this embodiment of the present application.
  • OFDM orthogonal frequency division multiplexing
  • Specially limited. Indicates the maximum number of Resource Blocks (RBs) included in the downlink channel.
  • c is a PN sequence that can be generated by a PN sequence generator (eg, a gold sequence generator) based on the initialization sequence c init .
  • a PN sequence generator eg, a gold sequence generator
  • n RNTI is the identity of the UE.
  • the PN sequence can be obtained.
  • the PN sequence includes Sequence elements, each sequence element being a complex signal, each sequence element being referred to as a value of a demodulation reference signal, Sequence elements can be called sequence length
  • the parameters of the two types of configuration information may be different: the sequence of the reference signal corresponding to one of the two types of configuration information and the sequence of the reference signal corresponding to the other of the two types of configuration information different.
  • sequence difference may mean that the lengths of the sequences are different.
  • sequence difference may mean that when the pseudo-random sequence generator is initialized with different initialization values, the generated pseudo-random sequences are different (even if the sequence length is the same).
  • Parameter D Port (specifically, the antenna port corresponding to the reference signal)
  • the same network device can distinguish different antenna ports by means of CDM, frequency division multiplexing (FDM), and time division multiplexing (TDM). If FDM or TDM is used, the frequency domain resources or time domain resources occupied by the reference signals of different antenna ports may be different. If CDM is used, the time-frequency resources occupied by the reference signals of different antenna ports may be the same, and different antenna ports are distinguished by multiplexing codes.
  • CDM frequency division multiplexing
  • TDM time division multiplexing
  • the CDM may include a frequency domain CDM and a time domain CDM.
  • different reference signals may be configured to be configured in the same symbol, that is, multiple (two or more) reference signals may be sent according to a frequency domain CDM manner.
  • the antenna port may also be referred to as a reference signal port, or, more specifically, may be understood as a reference signal port that has not been beamformed and precoded.
  • the reference signal is defined by the reference signal port, and each reference signal corresponds to one antenna port.
  • the difference between the parameters of the two types of configuration information may indicate that the antenna port corresponding to one of the two types of configuration information is different from the antenna port corresponding to the other of the two types of configuration information.
  • the same type of reference signal may correspond to multiple (two or more) configuration information, or the same reference signal (for example, The reference signal #1 or the reference signal #2) may correspond to a plurality of configuration information, wherein at least one of the parameter A, the parameter B, the parameter C, and the parameter D between the plurality of configuration information corresponding to the same reference signal The parameters are different.
  • the reference signal #1 may correspond to a plurality of configuration information.
  • the reference signal #2 may correspond to multiple configuration information.
  • each configuration information corresponding to the reference signal #1 and each configuration information corresponding to the reference signal #2 may be different, and the present application is not particularly limited.
  • the network device may determine the reference #A corresponding to a plurality of (two or more) signal configuration information #A. 1, specifically, the network device may determine the reference signal #A #A belongs. 1
  • the reference signal type (or demodulation object) is referenced, and a plurality of configuration information corresponding to the reference signal #A 1 is determined according to the reference signal type to which the reference signal #A 1 belongs.
  • the network device #A may determine that the reference signal #1 corresponds to the plurality of configuration information corresponding to the reference signal #1.
  • Reference signal #A 1 corresponds to a plurality of configuration information.
  • the network device #A may determine the reference according to the plurality of configuration information corresponding to the reference signal #2.
  • #A 1 signals corresponding to the plurality of configuration information.
  • the network device may be configured from a plurality #A #A. 1 corresponding to the reference signal information, send configuration information to determine the reference signal used when #A. 1 (hereinafter, the terminal device #A, for ease of understanding and differentiate , as: configuration information #A).
  • the network device #A may determine the configuration information #A by using any one of the following methods.
  • the network device #A may save the mapping relationship #1 (that is, an example of the first mapping relationship), and the mapping relationship #1 may be used to indicate multiple (two or more) information formats and A one-to-one mapping relationship between multiple (two or more) configuration information.
  • the information format may refer to an information format of control information (for example, downlink control information).
  • control information may include, but is not limited to, the following aspects: scheduling of uplink transmission or downlink transmission, requesting a channel quality indicator (CQI), reporting an uplink power control command, and the like.
  • CQI channel quality indicator
  • Different information formats can have different functions.
  • different services may use different information formats.
  • multiple information formats may have a one-to-one mapping relationship with multiple service types.
  • the multiple service types may include, but are not limited to:
  • eMBB Evolved Mobile Broadband
  • the International Telecommunications Union-Radio Communications Sector defines three major types of application scenarios for the future 5G, namely eMBB services and massively connected Internet of Things (mMTC, Massive Machine Type). Communication) Service and Ultra Reliable & Low Latency Communication (URLLC) services, and define the capabilities of 5G networks in eight dimensions: throughput, delay, connection density and spectrum efficiency improvement.
  • eMBB services mainly require large speed, wide coverage, transmission delay and mobility.
  • the main requirements of the URLLC service are extremely high reliability, extremely low mobility, and transmission delay.
  • the wireless air interface requires 99.999% transmission reliability in 1 millisecond (ms). That is, since different services (or service types) have different requirements for transmission reliability, different services (or service types) can be used to use reference signals of different configuration information.
  • different service types may correspond to different information formats, for example, the information format A is used for scheduling transmission of the eMBB service, and the information format B is used for scheduling transmission of the eMBB service.
  • Table 1 below shows an example of the above-described mapping relationship #1.
  • Control information Reference signal configuration information
  • Information format A Configuration information #1 for example, density is 1/2
  • Information format B Configuration information #2 for example, density is 1/3
  • the network device #A can determine the information format of the control information demodulated by the reference signal #A 1 (hereinafter, referred to as downlink control information #A for ease of understanding and distinction).
  • the network device may be based on information format #A downlink control information #A, the plurality of reference signals corresponding to the configuration information. 1 #A format information and downlink control information #A corresponding configuration information as configuration information #A.
  • the network device #A may save the mapping relationship #3 (that is, an example of the third mapping relationship), and the mapping relationship #3 may be used to indicate multiple (two or more) channel formats and A one-to-one mapping relationship between multiple (two or more) configuration information.
  • the channel format may refer to a resource usage form (for example, an aggregation level) for carrying control information.
  • multiple channel formats may be determined according to the number of Control Channel Elements (CCEs) and REGs occupied by the control information, and Table 2 below shows different channel formats. difference between.
  • CCEs Control Channel Elements
  • REGs REGs occupied by the control information
  • control information “occupying” CCE may refer to: part of resources in which the control information is carried in the “occupied” CCE (or REG), or control information.
  • the occupation of the CCE (or REG) may also mean that all the resources of the CCE (or REG) that the control information is carried in the "occupied” are not specifically limited.
  • Channel format for control information Reference signal configuration information Channel format 0 Configuration information #1 (for example, density is 1/3) Channel format 1 Configuration information #2 (for example, density is 1/3) Channel format 2 Configuration information #3 (for example, density is 1/2)
  • Channel format 3 Configuration information #4 (for example, density is 1/2)
  • the network device #A can determine the control information demodulated by the reference signal #A 1 (hereinafter, referred to as downlink control information #A for ease of understanding and distinction) (specifically, the channel carried by the channel) Channel format (or aggregation level).
  • downlink control information #A specifically, the channel carried by the channel
  • Channel format or aggregation level
  • the network device #A may be based on a channel format #A downlink control information corresponding to the plurality of reference signals corresponding to the configuration. 1 #A channel format information corresponding to the downlink control information #A corresponding configuration information as configuration information # A.
  • multiple channel formats may have a one-to-one mapping relationship with multiple service types.
  • the multiple service types may include, but are not limited to, the above URLLC type and eMBB type.
  • the reference signal #1 is used for demodulating the URLLC service.
  • Control information when transmitting the reference signal #1, configuration information having a larger density (for example, 1/2) can be used.
  • the control information of the channel format 2 or the channel format 3 may be used to transmit the control information.
  • the configuration information corresponding to the channel format 2 or the channel format 3 may be determined. Transfer the reference signal.
  • the reference signal #1 is used to demodulate the control information of the eMBB service, and when the reference signal #1 is transmitted, a configuration having a smaller density (for example, 1/3) may be used. information.
  • a configuration having a smaller density for example, 1/3
  • the configuration information corresponding to the channel format 0 or the channel format 1 may be determined. Transfer the reference signal.
  • the network device #A may save the mapping relationship #2 (that is, an example of the second mapping relationship), and the mapping relationship #2 may be used to indicate multiple (two or more) service types and A one-to-one mapping relationship between multiple (two or more) configuration information.
  • the multiple service types may include, but are not limited to:
  • the reference signal #1 when the density of the reference signal is high, the probability of successful demodulation increases, and thus the reliability of the transmission is large. Therefore, for example, for the reference signal #1, the reference signal #1 is used for demodulating the URLLC service. Control information, when transmitting the reference signal #1, configuration information having a large density (for example, 1/2) can be used.
  • the reference signal #1 is used to demodulate the control information of the eMBB service, and when the reference signal #1 is transmitted, the configuration information having a smaller density (for example, 1/3) may be used. .
  • configuration information having a larger density for example, 1/2 can be used when transmitting the reference signal #2.
  • the reference signal #2 is used to demodulate the data of the eMBB service, and when the reference signal #2 is transmitted, the configuration information having a smaller density (for example, 1/3) can be used.
  • Table 4 below shows an example of the above mapping relationship #2.
  • eMBB Configuration information #1 for example, density is 1/3
  • eMBB Configuration information #2 for example, density is 1/3
  • URLLC Configuration information #3 for example, density is 1/2
  • URLLC Configuration information #4 for example, density is 1/2
  • the network device may determine the service type #A reference signal #A. 1 as control information or data demodulated belongs (hereinafter, for ease of understanding, referred to as: service type #A).
  • the network device may be based on traffic type #A #A, a plurality of reference signals. 1 #A configuration information corresponding to the service type #A information as the configuration corresponding to the configuration information #A.
  • the network device #A may transmit the indication information of the configuration information #A (that is, an example of the first indication information) to the terminal device #A.
  • the network device #A learn #A transmits a reference signal (specifically, when a resource group is # 1 transmits a reference signal through the following frequency #A) using configuration 1 Information (ie, configuration information #A).
  • the network device #A may transmit one or more time-frequency resource groups (hereinafter, referred to as time-frequency resource group #1 for ease of understanding and differentiation) to the terminal device #A based on the configuration information #A.
  • the reference signal #A 1 and the network device can transmit downlink information that needs to be demodulated by the reference signal #A 1 to the terminal device #A.
  • the density of the reference signal is the configuration information #A.
  • Corresponding reference signal density is the configuration information #A.
  • the position of the reference signal #A 1 in the one or more time-frequency resource groups #1 is the reference signal position corresponding to the configuration information #A.
  • the sequence used by the reference signal #A 1 in the one or more time-frequency resource groups #1 is a sequence corresponding to the configuration information #A.
  • the antenna port used by the one or more time-frequency resource group #1 to transmit the reference signal #A 1 is corresponding to the configuration information #A.
  • Antenna port when the parameter of the configuration information #A includes an antenna port associated with the reference signal, the antenna port used by the one or more time-frequency resource group #1 to transmit the reference signal #A 1 is corresponding to the configuration information #A. Antenna port.
  • the terminal device #A can receive the reference signal #A 1 from the network device #A using one or more time-frequency resource groups #1 based on the configuration information #A, and the terminal device #A can be from the network device # a receives the reference signal need #A demodulated downlink message 1, based on the reference signal and the downlink information #A a demodulated.
  • the network device can be selected to select one of the multiple configuration information to match the current service.
  • configuration information capable of ensuring the reliability of the current service transmission, thereby being able to satisfy the requirements of the reference signal for the service having different reliability requirements.
  • the downlink information that needs to be demodulated by the reference signal #A may include downlink data #A 1 (that is, an example of the first downlink data) or downlink control information #A. (ie, an example of the first downlink control information).
  • the reference signal #A can also be used to demodulate the downlink data #A 2 (that is, an example of the second downlink data).
  • data or information may be sent through a resource set, where one resource set may include one or more time-frequency resource groups.
  • a resource set for transmitting control information may also be referred to as a Control Resource Set (CORESET).
  • CORESET Control Resource Set
  • one CORESET may include a plurality of REGs (ie, an example of a time-frequency resource group).
  • resource set #1 that is, an example of the first resource set.
  • the resource set #1 may occupy one symbol in the time domain and 6 subcarriers in the frequency domain.
  • the resource set #1 can occupy one symbol in the time domain and 16 subcarriers in the frequency domain.
  • the structure of the resource set #1 enumerated above (for example, the number of occupied subcarriers or symbols) is only an exemplary description, and the present application is not particularly limited, and those skilled in the art may select the resource set #1 as needed.
  • the number of occupied symbols or subcarriers is arbitrarily set or changed.
  • the network device #A may also send the downlink data #A 2 to the terminal device #A through the resource set # 2 .
  • the downlink data #A 2 can be transmitted in two ways.
  • the downlink data #A 2 is demodulated based on the reference signal #A.
  • resource set # two resource sets (for example, resource set #) respectively occupied by control information (for example, downlink control information #A) and data (for example, downlink data #A 2 ) demodulated based on the same reference signal are respectively used. 2 and the resource set #1) need to meet the specified (time domain or frequency domain) positional relationship.
  • the interval between the resource set #2 and the resource set #1 in the frequency domain needs to be less than or equal to a preset threshold #1 (ie, an example of the second threshold), as an example instead
  • the threshold #1 may be a value specified by a communication system or a protocol.
  • the threshold #1 may be a size of a frequency domain resource corresponding to one RB or an RB group (for example, 6 subcarriers).
  • the subcarrier occupied by the resource set #2_1 (that is, an example of the resource set #2) and the child occupied by the resource set #1_1 (that is, an example of the resource set #1) are occupied.
  • the carriers may be the same (ie, an example where the interval in the frequency domain is 0).
  • the subcarrier occupied by the resource set #2_2 may be adjacent to the subcarrier occupied by the resource set #1_1 (ie, the interval in the frequency domain is 0). Another example).
  • the subcarriers occupied by the resource set #2_3 may be adjacent to the subcarriers occupied by the resource set #1_1 (ie, the interval in the frequency domain is 0).
  • the interval in the frequency domain is 0.
  • the subcarriers occupied by the resource set #2_4 may be the same as the subcarriers occupied by the resource set #1_2 (that is, another example of the resource set #1). (That is, an example in which the interval in the frequency domain is 0).
  • the location relationship between the resource set #2 and the resource set #1 listed in FIG. 4 or FIG. 5 above is only an exemplary description, and the present application is not limited thereto, for example, the child occupied by the resource set #2.
  • the subcarriers occupied by the carrier and resource set #1 may also be separated by one or more (less than or equal to the threshold #1) subcarriers.
  • the interval between the resource set #2 and the resource set #1 in the time domain needs to be less than or equal to a preset threshold #2 (ie, an example of the first threshold), as an example instead.
  • the threshold #2 may be a communication system configuration or a preset value.
  • the configuration means that the network device needs to send configuration information to the terminal terminal.
  • the threshold #2 may be the size of the time domain resource corresponding to one RB or the RB group (for example, 1 or 2 symbols).
  • the symbol occupied by the resource set #2_1 or the resource set #2_3 may be adjacent to the symbol occupied by the resource set #1_1 (ie, an example in which the interval in the frequency domain is 0) .
  • the symbol occupied by the resource set #2_2 and the symbol occupied by the resource set #1_1 may be the same (that is, another example in which the interval in the frequency domain is 0).
  • the subcarriers occupied by the resource set #2_4 and the symbols occupied by the resource set #1_2 may be adjacent (that is, another example in which the interval in the frequency domain is 0).
  • a resource set is an RB or RB group.
  • the interval between the partial REG) and the partial time-frequency resource group in the resource set #2 (hereinafter, referred to as time-frequency resource group #2 for ease of understanding and explanation) is larger (in the frequency domain or in the time domain).
  • time-frequency resource group #2 for ease of understanding and explanation
  • time-frequency resource group #3 when the time-frequency resource group #1 and the resource set #2 for carrying the control information #A and the reference signal #A are used to carry the downlink data #A 2 in the resource set #1
  • the frequency resource group (that is, an example of the third time-frequency resource group, hereinafter, for convenience of understanding and explanation, referred to as time-frequency resource group #3) needs to satisfy a predetermined (time-domain or frequency-domain) positional relationship.
  • the location relationship may be that the interval between the time-frequency resource group #1 and the time-frequency resource group #3 in the frequency domain needs to be less than or equal to a preset threshold #3 (ie, an example of the fourth threshold).
  • the threshold #3 may be a value specified by a communication system or protocol, for example, the threshold #3 may be the size of a frequency domain resource corresponding to 1 RB or RB group (eg, 6 subcarriers).
  • the location relationship may be that the interval between the time-frequency resource group #1 and the time-frequency resource group #3 in the time domain needs to be less than or equal to a preset threshold #4 (ie, an example of the third threshold).
  • the threshold #4 may be a value specified by a communication system or protocol, for example, the threshold #4 may be the size of a time domain resource corresponding to 1 RB or RB group (eg, 1 or 2 symbols) .
  • a sequence length (hereinafter, referred to as reference signal #X) for demodulating downlink data (hereinafter, for ease of understanding and distinction) is set (for example, the length of a sequence on one symbol) Is t, wherein the sequence length t of the reference signal #X may be determined according to the number of time-frequency resources (for example, PRBs) for carrying the reference signal #X, for example, the length t may be determined based on the formula (1).
  • the (for example, continuous) time-frequency resources for carrying the reference signal #X are time-frequency resources #0 to time-frequency resources #n (for example, the time-frequency resource #0 to the time-frequency resource #n correspond to one symbol) , wherein the time-frequency resource #m to the time-frequency resource #n in the time-frequency resource #0 to the time-frequency resource #n are configured as a CORESET for carrying control information, and
  • the reference signal for demodulating the control information carried by the time-frequency resource #m to the time-frequency resource #k (hereinafter, for ease of understanding and distinction, referred to as: reference signal #Y) has a sequence length of u.
  • the network device may carry the first p sequences in the sequence of the reference signal #X in the time-frequency resource #0 to the time-frequency resource #m-1 (or, in the sequence of the reference signal #X having the length t)
  • the first sequence to the pth sequence wherein the specific values of the p sequences may correspond to the sizes of the time-frequency resources #0 to the time-frequency resources #m-1.
  • the network device may not carry the u sequences from the p sequences in the sequence of the reference signal #X in the time-frequency resource #m to the time-frequency resource #k (or the sequence of the reference signal #X having the length t)
  • the p+1th sequence to the p+uth sequence and the downlink data may be demodulated based on the reference signal #Y carried in the time-frequency resource #m to the time-frequency resource #k.
  • the network device may carry the post-tpu sequence in the sequence of the reference signal #X in the time-frequency resource #k to the time-frequency resource #n (or the p+u in the sequence of the reference signal #X having the length t) +1 sequence to t-th sequence).
  • the length of the reference sequence may refer to the length of the sequence on one symbol, that is, the length of the sequence generated based on the above formula (1) is the length of the sequence on one symbol,
  • the value of t may be the length of the sequence generated based on the above formula (1).
  • the length of the above reference sequence may refer to the length of a sequence on a plurality of symbols (for example, a plurality of symbols included in one transmission time interval TTI), that is, the length of the sequence generated based on the above formula (1) is a plurality of symbols.
  • the length of the sequence, the value of t above may be the length of the sequence located on a symbol including the CORESET based on the length of the sequence generated by the above formula (1).
  • the downlink data and the downlink control information are carried on the same symbol (for example, symbol #1)
  • the time-frequency resource for example, RE#1 to which the DMRS needs to be mapped and the time-frequency resource (for example, RE) to be mapped by the DMRS for demodulating downlink control information (for example, downlink control information #A) #1
  • the DMRS for demodulating the downlink data is not mapped on the RE#1.
  • the downlink data (for example, downlink data #A 2 ) may be demodulated based on the DMRS for demodulating downlink control information (for example, downlink control information #A).
  • the downlink data (for example, downlink data #A 2 ) needs to be mapped to the frequency range corresponding to the time-frequency resource (for example, RE#2) and the DMRS for demodulating the downlink control information (for example, the downlink control information #A). If the frequency range corresponding to the time-frequency resource (for example, RE#3) to be mapped is the same, the DMRS for demodulating the downlink data is not mapped on RE#2. In this case, the downlink data (for example, downlink data #A 2 ) may be demodulated based on the DMRS for demodulating downlink control information (for example, downlink control information #A).
  • the network device #A may perform precoding processing on the reference signal #A and the downlink control information #A based on the precoding matrix #A (ie, an example of the first precoding matrix).
  • the network device #A can also pre-code the data (including the downlink data #A 2 ) carried in the resource set (ie, the resource set #2) for carrying the downlink data #A 2 based on the precoding matrix #A. deal with.
  • the network device #A can also base the reference signal #A based on the precoding matrix #A 2 Perform precoding processing.
  • configuration information of the reference signal #A 2 and the reference signal #A 1 may be the same or different, and the present application is not particularly limited.
  • the resource set # 1 may also be a network device #A performs precoding processing of data carried in one RB group #A according to the precoding matrix #A, wherein The RB group #A 1 includes the RB (or RB group) occupied by the resource set #1.
  • the network device #A can also base the reference signal based on the precoding matrix #A# A 3 performs precoding processing.
  • the network device #A may further perform precoding processing on the data carried in the RB group #A 2 according to the precoding matrix #A, where The RB group #A 2 includes the RB (or RB group) occupied by the resource set #2.
  • the network device #A can also base the reference signal based on the precoding matrix #A# A 4 performs precoding processing.
  • resource set #1 occupies RB group #1 and RB group #2 (specifically, RB group #1 and RB group # Part RE of 2), therefore, the network device #A can perform precoding processing on the reference signals and data carried in the RB group #1 and the RB group #2 based on the precoding matrix #A.
  • resource set #1 does not occupy the time-frequency resource in RB group #3, and RB group #3 does not carry the demodulation required based on reference signal #A.
  • the network device #A may perform precoding processing on the reference signals and data carried in the RB group #3 without based on the precoding matrix #A.
  • resource set #2 occupies RB group #4 and RB group #5 (specifically, RB group #4 and RB group) Part RE of #5), or RB group #4 and RB group #5, carries data that needs to be demodulated based on reference signal #A. Therefore, network device #A can be based on precoding matrix #A, The reference signals and data carried in the RB group #4 and the RB group #5 are subjected to precoding processing.
  • resource set #6 does not occupy the time-frequency resource in RB group #3, and RB group #6 does not carry the demodulation required based on reference signal #A.
  • the network device #A may perform precoding processing on the reference signals and data carried in the RB group #6 without based on the precoding matrix #A.
  • the downlink control channel and its associated DMRS use the same precoding matrix, where N may be a preset value of the system.
  • N may be the number of REGs included in one RB group.
  • the same precoding matrix is used for the downlink data channel and its associated DMRS in the same or consecutive M RBs, where M may be a preset value of the system, for example, N may be The number of RBs included in an RB group.
  • the same precoding matrix is used in one resource unit group REG in resource set #1, and in the downlink data channel mapping on the symbol #B, the downlink data channel and its association are in one RB group.
  • the DMRS uses the same precoding matrix. Since resource elements 5 and 6 and resource set #1 on symbol #B are located at the same location in the frequency domain, all REs in PRB group 4 use the same precoding matrix as the downlink control channel within the REG. Similarly, all REs in the PRB group 5 also use the same precoding matrix as the downlink control channel in the REG.
  • the processing object of the downlink physical channel processing is a codeword, and the codeword is usually a bitstream that is encoded (including at least channel coding).
  • the code word is scrambling to generate a scrambled bit stream.
  • the scrambled bit stream is subjected to modulation mapping to obtain a stream of modulation symbols.
  • the modulation symbol stream is mapped to a plurality of layers by layer mapping.
  • the symbol stream after layer mapping may be referred to as a layer mapping space layer. (Or, layer mapping spatial stream, layer mapping symbol stream).
  • the layer mapping spatial layer is subjected to precoding processing based on a precoding matrix to obtain a plurality of precoded data streams (or precoded symbol streams).
  • the precoded symbol stream is mapped to multiple REs via a resource particle (RE) map. These REs are then subjected to orthogonal frequency division multiplexing (OFDM) modulation to generate an OFDM symbol stream.
  • OFDM orthogonal frequency division multiplexing
  • the precoding process can be reduced.
  • the complexity and the complexity of the channel design can reduce the processing load of the network device and improve the communication efficiency.
  • downlink data #A 2 is demodulated based on reference signal #A'.
  • the resources (ie, the resource set #2) carried by the downlink data #A 2 may be similar to those in the foregoing mode 2, and a detailed description thereof will be omitted herein to avoid redundancy.
  • the time-frequency resource group for carrying the reference signal #A' is the time-frequency resource group #1'.
  • the time-frequency resource group #1' may belong to the resource set #1.
  • the time-frequency resource group #1' may belong to the above-mentioned resource set #2.
  • the transmission mode of the downlink data #A 2 and the reference signal #A' can be similar to the prior art.
  • the details are omitted. Description.
  • the precoding matrix used by the reference signal #A' and the reference signal #A may be different. In this case, in order to ensure the accuracy and reliability of the communication, it is preferable not to make the reference signal #A' and the reference.
  • the signal #A multiplexes the time-frequency resources, or preferably does not make the time-frequency resource group #1' and the time-frequency resource group #1 intersect.
  • the time-frequency resource group #1' and the time-frequency resource group #1 have overlapping portions in the resource set #1, or
  • the time-frequency resource group #1' and the time-frequency resource group #1 include at least one identical time-frequency resource.
  • the time-frequency resource that the DMRS used to demodulate the downlink data (for example, the downlink data #A 2 ) needs to be mapped based on the preset offset, for example, the time-frequency resource group #1'
  • the time-frequency resource in the medium is offset, and the DMRS for demodulating downlink data (for example, downlink data #A 2 ) is transmitted on the offset time-frequency resource.
  • the offset may include an offset (for example, one or more symbols) in the time domain.
  • Shifting may include shifting the time-frequency resource backwards by the offset (one or more symbols) in the time domain, or may, in the time domain, the interval between the time-frequency resource and the offset
  • the time-frequency resource corresponding to the shift is used as the time-frequency resource of the DMRS for transmitting the downlink data.
  • the offset may include an offset in the frequency domain (for example, one or more REs).
  • the time-frequency resource to be mapped by the DMRS used for demodulating the downlink data is biased. Shifting may include shifting the time-frequency resource in a frequency domain to a high (or low frequency) direction by the offset (one or more REs), or may be between the frequency domain and the time-frequency resource The time-frequency resource corresponding to the offset is used as the time-frequency resource of the DMRS for transmitting the downlink data.
  • time-frequency resource offset in the time-frequency resource group #1 may mean that each time-frequency resource in the time-frequency resource group #1' is offset.
  • the “time-frequency resource offset in the time-frequency resource group #1′” may refer to when the time-frequency resource group #1′ overlaps with the time-frequency resource group #1.
  • the frequency resource is offset.
  • the network device may further send, to the terminal device, indication information for the transmission mode of the downlink data #A 2 (for example, the foregoing mode 1 or the foregoing mode 2), that is, the indication information may be It is used to indicate whether the reference signal for demodulating the downlink data #A 2 and the reference signal for demodulating the downlink control information #A are the same.
  • indication information for the transmission mode of the downlink data #A 2 for example, the foregoing mode 1 or the foregoing mode 2
  • the indication information may be It is used to indicate whether the reference signal for demodulating the downlink data #A 2 and the reference signal for demodulating the downlink control information #A are the same.
  • the terminal device can determine the reference signal for demodulating the downlink data #A 2 based on the indication information.
  • the preset offset may be specified by a communication system or a communication protocol, so that the network device and the terminal device may determine the offset based on a specification of the communication system or the communication protocol, and Make the offset determined by the network device and the terminal device consistent.
  • the offset may be determined by the network device and notified to the terminal device.
  • the network device may semi-statically indicate the preset offset by using high layer signaling (such as SIB or RRC signaling).
  • high layer signaling such as SIB or RRC signaling
  • the network device can dynamically indicate the preset offset by physical layer signaling (the following line control information DCI).
  • the time-frequency resource group #1 is a partial time-frequency resource group in the resource set #1, the generality is not lost, and the resource set #1 is other than the time-frequency resource group #1.
  • the one or more time-frequency resource groups are time-frequency resource group #4 (ie, an example of the second time-frequency resource group), and the network device #A can also pass the terminal device #A in the time-frequency resource group #4.
  • the downlink data #A 4 and the reference signal #A 4 i.e., an example of the second demodulation reference signal
  • the configuration information used by the reference signal #A 4 in the time-frequency resource set #1 may be configured with the reference signal #A 1 in the time-frequency resource set #1. the same.
  • the configuration information used by the reference signal #A 4 in the time-frequency resource set #1 may be used in the time-frequency resource set #1 with the reference signal #A 1
  • the configuration information is different.
  • the network device #A may configure a resource set for transmitting control information (for example, control information #A) for the terminal device #A (ie, CORESET, for example, resource set #1). And, the network device #A may transmit the configuration information #A to the terminal device #A, which may include information #A_1 indicating the resource (for example, symbol) occupied by the resource set #1 in the time domain. And, the configuration information #A may include information #A_2 for indicating a resource (for example, a subcarrier) occupied by the resource set #1 in the frequency domain.
  • the information (or the indicated content) included in the configuration information #A enumerated above is only an exemplary description, and the present application is not limited thereto.
  • the configuration information #A may also be used to indicate the resource collection #1. Occupied RE, REG or PRB, etc.
  • the configuration information #A may further include the indication information of the configuration information #A.
  • the network device #A when the network device #A specifically transmits the downlink control information, there may be a case where there are remaining resources in the resource set #1, and thus, the network device #A may use the remaining resources to transmit data.
  • the configuration information of the DMRS for demodulating the data may be the same as the configuration information of the DMRS for demodulating the downlink control information.
  • the configuration information of the DMRS for demodulating the data may be different from the configuration information of the DMRS for demodulating the downlink control information.
  • the reference signal, the downlink control information, and the data carried in the resource set #1 may be pre-coded based on the same precoding matrix.
  • the resource set #1 occupies the symbol # ⁇ in the time domain, and the data transmitted by the network device #A to the terminal device #A (for example, the data scheduled by the control information #A) occupies the symbol # ⁇ .
  • the DMRS associated with the downlink data transmitted in the resource set #1 is the same as the DMRS associated with the control information #A (specifically, reference)
  • the configuration information of the signal is the same).
  • the DMRS associated with the downlink data transmitted in the resource set #1 on the symbol # ⁇ is the same as the DMRS associated with the downlink data transmitted on the symbol # ⁇ . Thereby the density of the DMRS can be reduced.
  • the network device #A may further send the indication information #A to the terminal device #A, where the indication information #A is used to indicate that the network device #A uses the remaining resources of the resource set #1 to transmit data, and the data is associated with the DMRS.
  • the configuration information, or the indication information #A is used to indicate whether the DMRS associated with the data is a DMRS associated with the control information or a DMRS associated with the data channel at symbol # ⁇ .
  • the DMRS associated with the data carried on the remaining resources can be configured using the DMRS associated with the control information; or if If there are many remaining resources in the resource set #1, the DMRS associated with the data carried on the remaining resources may use the configuration information of the DMRS associated with the data carried on the symbol # ⁇ .
  • a DMRS associated with the control information may be: the DMRS associated with the control information is used to demodulate the control information.
  • a data-associated DMRS may mean that the DMRS associated with the data is used to demodulate the data.
  • the reference signal may also correspond to multiple #A. 4 configuration information, and the reference signal #A various configuration settings and usage information may be similar to the above-described reference signal #A 4 4, where, in order to avoid repeated The detailed description thereof is omitted, and the configuration information used by the reference signal #A 4 in the resource set #1 may be the above-described configuration information #A, or the configuration information used by the reference signal #A 4 in the resource set #1 may be from the network device.
  • the reference signal #A 4 corresponds to a plurality of types of configuration information which are configuration information different from the configuration information #A.
  • FIG. 9 is a schematic interaction diagram of a method 300 for transmitting and receiving a reference signal according to an embodiment of the present application.
  • a communication system e.g., communication system 100 described above
  • the reference signal may be used for channel measurement, and then used for demodulation.
  • the reference signal in the embodiment of the present application may include a DMRS.
  • the at least two types of reference signals include: a reference information number (ie, reference signal #1) for demodulating control information (or control channel), and, by way of example and not limitation, the control information may include a downlink Control information, the control channel may include a physical downlink control channel.
  • a reference information number ie, reference signal #1
  • the control information may include a downlink Control information
  • the control channel may include a physical downlink control channel.
  • the at least two types of reference signals include: a reference information number (ie, reference signal #2) for demodulating data (or a data channel), and, by way of example and not limitation, the data may include a downlink Data, the data channel can include a physical downlink data channel.
  • a reference information number ie, reference signal #2
  • the data may include a downlink Data
  • the data channel can include a physical downlink data channel.
  • the configuration information of the reference signal #1 and the reference signal #2 are different.
  • the reference signal #1 may have a configuration information, and the reference signal #1 may have a configuration information.
  • the definition and related description of the configuration information of the reference signal in the method 300 may be similar to the description of the “configuration information” in the method 200 described above, for example, the configuration in the method 300, except that each reference signal only corresponds to one type of configuration information.
  • the parameters included in the information may be similar to those included in the configuration information described in the method 200, and a detailed description thereof will be omitted herein to avoid redundancy.
  • the difference between the configuration information of the reference signal #1 and the reference signal #2 may mean that at least one different parameter exists between the configuration information of the reference signal #1 and the configuration information of the reference signal #2.
  • the network device #B may transmit the reference signal #B to the terminal device #B through the resource set #A (ie, an example of the first resource set), and the network device #B may transmit the need to pass to the terminal device #B.
  • the downlink control information #B demodulated by the reference signal #B that is, an example of the first downlink control information.
  • the method and structure for determining the resource set #A may be similar to the method and structure for determining the resource set #1 in the method 200. Here, in order to avoid redundancy, detailed description thereof is omitted.
  • the network device #B may transmit the downlink data #B (ie, an example of the second downlink data) to the terminal device #B through the resource set #B, wherein the downlink data #B is based on the reference signal #B Tune.
  • the method and structure for determining the resource set #B may be similar to the method and structure for determining the resource set #2 in the method 200. Here, in order to avoid redundancy, a detailed description thereof will be omitted.
  • the preset (frequency domain or time domain) location relationship needs to be met between the resource set #B and the resource set #A, where the resource set #B and the resource set #A are
  • the positional relationship that needs to be satisfied may be similar to the positional relationship that needs to be satisfied between the resource collection #2 and the resource collection #1.
  • detailed description thereof will be omitted.
  • the reference signal #B and the downlink control information #B are carried in the time-frequency resource group #A in the resource set #A, and the downlink data #B is carried in the time-frequency resource group in the resource set #B.
  • #B, the time-frequency resource group #A and the time-frequency resource group #B need to meet a preset (frequency domain or time domain) location relationship, where the time-frequency resource group #A and the time-frequency resource group
  • the positional relationship that needs to be satisfied between #B and the time-frequency resource group #1 and the time-frequency resource group #3 may be similar to the positional relationship that needs to be satisfied.
  • detailed description thereof will be omitted.
  • the network device #B may perform precoding processing on the reference signal #B and the downlink control information #B based on the precoding matrix #B (ie, another example of the first precoding matrix).
  • the network device #A may further perform precoding processing on data carried in the resource set (ie, resource set #B) for carrying the downlink data #B based on the precoding matrix #B.
  • the network device #B may further perform precoding processing on the reference signal based on the precoding matrix #B.
  • network device #B may also be in the RB (or RB group) according to precoding matrix #B.
  • the carried data is precoded.
  • the network device #B may further perform precoding processing on the reference signal based on the precoding matrix #B.
  • the precoding process can be reduced.
  • the complexity and the complexity involved in the channel can reduce the processing load of the network device and improve the communication efficiency.
  • the reference signal #B and the downlink control information #B may be sent by using at least one time-frequency resource group #A, and when the time-frequency resource group #A is a resource set # For a part of the time-frequency resource group in A, without loss of generality, one or more time-frequency resource groups other than the time-frequency resource group #A in resource set #A are time-frequency resource group #B (ie, second In an example of the time-frequency resource group, the network device #A may also transmit the downlink data #C and the reference signal #C to the terminal device #B in the time-frequency resource group #B (that is, an example of the second demodulation reference signal) ). Among them, the downlink data #C is demodulated based on the reference signal #C.
  • the reference signal #C configuration information may be the same as the configuration information of the reference signal #B.
  • the configuration information of the reference signal #C may be different from the configuration information of the reference signal #B.
  • the relationship between the reference signal #C and the reference signal #B may be different from the reference signal #A 4 described in the above method 200, except that the reference signal #C and the reference signal #B may correspond to only one type of configuration information.
  • the relationship with the reference signal #A 1 is similar, and a detailed description thereof will be omitted herein to avoid redundancy.
  • FIG. 10 is a schematic interaction diagram of a method 400 for transmitting and receiving a reference signal according to an embodiment of the present application.
  • a communication system e.g., communication system 100 described above
  • the reference signal may be used for channel measurement, and then used for demodulation.
  • the reference signal in the embodiment of the present application may include a DMRS.
  • the at least two types of reference signals include: a reference information number (ie, reference signal #1) for demodulating control information (or control channel), and, by way of example and not limitation, the control information may include a downlink Control information, the control channel may include a physical downlink control channel.
  • a reference information number ie, reference signal #1
  • the control information may include a downlink Control information
  • the control channel may include a physical downlink control channel.
  • the at least two types of reference signals include: a reference information number (ie, reference signal #2) for demodulating data (or a data channel), and, by way of example and not limitation, the data may include a downlink Data, the data channel can include a physical downlink data channel.
  • a reference information number ie, reference signal #2
  • the data may include a downlink Data
  • the data channel can include a physical downlink data channel.
  • the configuration information of the reference signal #1 and the reference signal #2 are different.
  • the reference signal #1 may have a configuration information, and the reference signal #1 may have a configuration information.
  • the definition and related description of the configuration information of the reference signal in the method 400 may be similar to the description of the "configuration information" in the method 200 described above, except for each reference signal corresponding to only one configuration information, for example, the configuration in the method 400.
  • the parameters included in the information may be similar to those included in the configuration information described in the method 200, and a detailed description thereof will be omitted herein to avoid redundancy.
  • the difference between the configuration information of the reference signal #1 and the reference signal #2 may mean that at least one different parameter exists between the configuration information of the reference signal #1 and the configuration information of the reference signal #2.
  • the network device #C may transmit the reference signal # ⁇ to the terminal device #C through the resource set # ⁇ (ie, an example of the first resource set), and the network device #C may transmit the need to pass to the terminal device #C.
  • the downlink control information # ⁇ demodulated by the reference signal # ⁇ that is, an example of the first downlink control information.
  • the method and structure for determining the resource set # ⁇ may be similar to the method and structure for determining the resource set #1 in the above method 200. Here, in order to avoid redundancy, detailed description thereof will be omitted.
  • the reference signal # ⁇ and the downlink control information # ⁇ may be sent by at least one time-frequency resource group # ⁇ , and when the time-frequency resource group # ⁇ is the resource set # ⁇ For the partial time-frequency resource group, without loss of generality, it is assumed that one or more time-frequency resource groups other than the time-frequency resource group # ⁇ in the resource set # ⁇ are the time-frequency resource group # ⁇ (ie, the second time)
  • the network device #C may also transmit the downlink data # ⁇ and the reference signal # ⁇ to the terminal device #C in the time-frequency resource group # ⁇ (that is, an example of the second demodulation reference signal). .
  • the downlink data # ⁇ is demodulated based on the reference signal # ⁇ .
  • the reference signal # ⁇ configuration information may be the same as the configuration information of the reference signal # ⁇ .
  • the reference signal # ⁇ configuration information may be different from the configuration information of the reference signal # ⁇ .
  • the relationship between the reference signal # ⁇ and the reference signal # ⁇ may be different from the reference signal #A 4 described in the above method 200, except that the reference signal # ⁇ and the reference signal # ⁇ may correspond to only one type of configuration information.
  • the relationship with the reference signal #A 1 is similar, and a detailed description thereof will be omitted herein to avoid redundancy.
  • FIG. 11 is a schematic interaction of the method 700 for transmitting and receiving a reference signal in the embodiment of the present application.
  • a communication system e.g., communication system 100 described above
  • the reference signal may be used for channel measurement, and then used for demodulation.
  • the reference signal in the embodiment of the present application may include a DMRS.
  • the at least two types of reference signals include: a reference information number (ie, reference signal #1) for demodulating control information (or control channel), and, by way of example and not limitation, the control information may include a downlink Control information, the control channel may include a physical downlink control channel.
  • a reference information number ie, reference signal #1
  • the control information may include a downlink Control information
  • the control channel may include a physical downlink control channel.
  • the at least two types of reference signals include: a reference information number (ie, reference signal #2) for demodulating data (or a data channel), and, by way of example and not limitation, the data may include a downlink Data, the data channel can include a physical downlink data channel.
  • a reference information number ie, reference signal #2
  • the data may include a downlink Data
  • the data channel can include a physical downlink data channel.
  • the configuration information of the reference signal #1 and the reference signal #2 are different.
  • the reference signal #1 may have a configuration information, and the reference signal #1 may have a configuration information.
  • the definition and related description of the configuration information of the reference signal in the method 700 may be similar to the description of the “configuration information” in the method 200 described above, for example, in the method 700, except that each reference signal only corresponds to one type of configuration information.
  • the parameters included in the information may be similar to those included in the configuration information described in the method 200, and a detailed description thereof will be omitted herein to avoid redundancy.
  • the difference between the configuration information of the reference signal #1 and the reference signal #2 may mean that at least one different parameter exists between the configuration information of the reference signal #1 and the configuration information of the reference signal #2.
  • the downlink information #E may be downlink control information or downlink data.
  • network device #D may determine resource set #D.
  • the resource set #D may include a time-frequency resource group #D and a time-frequency resource group #E, wherein the time-frequency resource group #D is a reserved resource, and the time-frequency resource group #E is determined based on a pre-configured configuration pattern.
  • the reserved time-frequency resource may be a time-frequency resource that the terminal device determines to not carry the reference signal.
  • the network device #D may send the indication information Y to the terminal device #D, where the indication information Y is used to indicate that the time-frequency resource in the time-frequency resource group #D is reserved time-frequency. Resources.
  • the terminal device can determine, according to the indication information Y, the time-frequency resource in the time-frequency resource group #D as the reserved time-frequency resource, and further determine whether the time-frequency resource group #D and the time-frequency resource group #E have overlapping portions. .
  • the method and structure for determining the resource set #D may be similar to the method and structure for determining the resource set #1 in the above method 200. Here, in order to avoid redundancy, detailed description thereof will be omitted.
  • time-frequency resource #D is a reserved resource, it is preferable to make the intersection of the time-frequency resource group #D and the time-frequency resource group #E empty.
  • the network device #D may offset the time-frequency resource in the time-frequency resource group #E based on the preset offset.
  • the network device #D may transmit the reference signal #E on the offset time-frequency resource (hereinafter, referred to as time-frequency resource group #F for ease of understanding and differentiation).
  • the offset may include an offset in the time domain (for example, one or more symbols).
  • “offset the time-frequency resource in the time-frequency resource group #E” may be included in the time.
  • the time-frequency resource is backward offset by the offset (one or more symbols), or the interval between the time-frequency resource and the time-frequency resource may be the time-frequency corresponding to the offset.
  • the resource is used as the time-frequency resource group #F.
  • the offset may include an offset in the frequency domain (eg, one or more REs).
  • “offset the time-frequency resource in the time-frequency resource group #E” may include the frequency.
  • the time-frequency resource is offset from the high-frequency (or low-frequency) direction by the offset (one or more REs), or the interval between the time-frequency resource in the frequency domain and the offset may be The corresponding time-frequency resource is used as the time-frequency resource group #F.
  • “shifting the time-frequency resource in the time-frequency resource group #E” may mean that each time-frequency resource in the time-frequency resource group #E is offset. That is, in this case, each time-frequency resource in the time-frequency resource group #F is obtained by offsetting the time-frequency resource in the time-frequency resource group #E.
  • “offsetting the time-frequency resource in the time-frequency resource group #E” may refer to only when the time-frequency resource group #D overlaps with the time-frequency resource group #D.
  • the frequency resource is offset, that is, in this case, the time-frequency resource in the time-frequency resource group #F includes the time-frequency resource in the time-frequency resource group #E that does not overlap with the time-frequency resource group #D, and the time-frequency resource
  • the time-frequency resource in the group #F includes the time-frequency resource obtained by the offset of the time-frequency resource overlapping with the time-frequency resource group #D in the time-frequency resource group #E.
  • the preset offset may be specified by a communication system or a communication protocol, so that the network device #D and the terminal device #D may determine the offset based on a specification of the communication system or the communication protocol. And, the offsets determined by the network device #D and the terminal device #D can be made uniform. Alternatively, in the embodiment of the present application, the offset may be determined by the network device #D, and the terminal device #D is notified.
  • the network device may semi-statically indicate the preset offset by using high layer signaling (such as SIB or RRC signaling).
  • high layer signaling such as SIB or RRC signaling
  • the network device can dynamically indicate the preset offset by physical layer signaling (the following line control information DCI).
  • the method and procedure of the terminal device #D determining the resource set #D, the resource set #E, and the time-frequency resource group #F may be similar to the processing of the network device #D, and a detailed description thereof will be omitted herein to avoid redundancy.
  • FIG. 12 is a schematic block diagram of an apparatus 500 for transmitting a reference signal according to an embodiment of the present application.
  • the apparatus 500 for transmitting a reference signal may correspond to (for example, may be configured or itself) the above method 200, 300, 400 or 700.
  • the network device is described, and each module or unit in the device 500 for transmitting the reference signal is used to perform each action or process performed by the network device in the above method 200, 300, 400 or 700, and is omitted here for avoiding redundancy. Its detailed description.
  • the device 500 may be a network device.
  • the device 500 may include: a processor and a transceiver, and the processor and the transceiver are communicatively coupled.
  • the device further includes a memory, and the memory Connected to the processor.
  • the processor, the memory and the transceiver can be communicatively coupled, the memory being operative to store instructions for executing the memory stored instructions to control the transceiver to transmit information or signals.
  • the transceiver unit in the apparatus 500 shown in FIG. 12 can correspond to the transceiver
  • the processing unit in the apparatus 500 shown in FIG. 12 can correspond to the processor
  • the device 500 may be a chip (or a chip system) installed in a network device.
  • the device 500 may include: a processor and an input and output interface, and the processor may pass input and output.
  • the interface is communicatively coupled to the transceiver of the network device.
  • the device further includes a memory in communication with the processor.
  • the processor, the memory and the transceiver can be communicatively coupled, the memory being operative to store instructions for executing the memory stored instructions to control the transceiver to transmit information or signals.
  • the transceiver unit in the apparatus 500 shown in FIG. 12 can correspond to the input/output interface
  • the processing unit in the apparatus 500 shown in FIG. 12 can correspond to the processor
  • FIG. 13 shows a schematic block diagram of an apparatus 600 for receiving a reference signal, which may correspond to (eg, may be configured to implement) the above described method 200, 300, 400 or 700, in accordance with an embodiment of the present application.
  • the terminal device, and each module or unit in the device 600 for receiving the reference signal is used to perform each action or process performed by the terminal device in the above method 200, 300, 400 or 700.
  • the details are omitted. Description.
  • the device 600 may be a terminal device.
  • the device 600 may include: a processor and a transceiver, and the processor and the transceiver are communicatively coupled.
  • the device further includes a memory, and the memory Connected to the processor.
  • the processor, the memory and the transceiver can be communicatively coupled, the memory being operative to store instructions for executing the memory stored instructions to control the transceiver to transmit information or signals.
  • the transceiver unit in the apparatus 600 shown in FIG. 13 can correspond to the transceiver
  • the processing unit in the apparatus 600 shown in FIG. 13 can correspond to the processor
  • the device 600 may be a chip (or a chip system) installed in a network device.
  • the device 600 may include: a processor and an input and output interface, and the processor may pass input and output.
  • the interface is communicatively coupled to the transceiver of the network device.
  • the device further includes a memory in communication with the processor.
  • the processor, the memory and the transceiver can be communicatively coupled, the memory being operative to store instructions for executing the memory stored instructions to control the transceiver to transmit information or signals.
  • the transceiver unit in the device 600 shown in FIG. 13 can correspond to the input input interface
  • the processing unit in the device 600 shown in FIG. 12 can correspond to the processor
  • 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, and may be in an electrical, mechanical or other form.
  • 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 purpose of the solution of the embodiment.
  • 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 functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used 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 codes. .

Abstract

La présente invention concerne un procédé d'émission de signal de référence. Le procédé consiste à : déterminer un ensemble de ressources, qui est utilisé pour supporter un signal de référence de démodulation et des informations de liaison descendante, les informations de liaison descendante étant des informations de commande de liaison descendante ou des données de liaison descendante, le signal de référence de démodulation étant utilisé pour démoduler les informations de liaison descendante, l'ensemble de ressources comprenant un premier ensemble de ressources temps-fréquence et un second ensemble de ressources temps-fréquence, le premier ensemble de ressources temps-fréquence étant un ensemble de ressources temps-fréquence réservées et le deuxième ensemble de ressources temps-fréquence étant utilisé pour supporter le signal de référence de démodulation ; déterminer un troisième ensemble de ressources temps-fréquence en fonction de la position du deuxième ensemble de ressources temps-fréquence et d'un décalage prédéfini lorsqu'il existe une partie de chevauchement entre le premier ensemble de ressources temps-fréquence et le deuxième ensemble de ressources temps-fréquence ; et envoyer le signal de référence de démodulation selon le troisième ensemble de ressources temps-fréquence. Par conséquent, l'émission d'un signal de référence de démodulation peut être mise en œuvre de manière fiable, et ainsi la fiabilité de communication est améliorée.
PCT/CN2018/091447 2017-06-16 2018-06-15 Procédé d'émission de signaux de référence, procédé de réception de signaux de référence et appareil de communication WO2018228522A1 (fr)

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BR112019026840-5A BR112019026840A2 (pt) 2017-06-16 2018-06-15 método de transmissão de sinal de referência, método de recepção de sinal de referência e aparelho de comunicações
EP18816854.6A EP3627732A4 (fr) 2017-06-16 2018-06-15 Procédé d'émission de signaux de référence, procédé de réception de signaux de référence et appareil de communication
JP2019569352A JP7246327B2 (ja) 2017-06-16 2018-06-15 参照信号送信方法、参照信号受信方法及び通信装置
US16/712,566 US11239970B2 (en) 2017-06-16 2019-12-12 Reference signal sending method, reference signal receiving method, and communications apparatus

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CN201710459603.1 2017-06-16
CN201710910063.4 2017-09-29
CN201710910063.4A CN109150387B (zh) 2017-06-16 2017-09-29 发送参考信号的方法、接收参考信号的方法和通信装置

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