WO2021018209A1 - 一种dmrs端口指示方法及装置 - Google Patents
一种dmrs端口指示方法及装置 Download PDFInfo
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- WO2021018209A1 WO2021018209A1 PCT/CN2020/105567 CN2020105567W WO2021018209A1 WO 2021018209 A1 WO2021018209 A1 WO 2021018209A1 CN 2020105567 W CN2020105567 W CN 2020105567W WO 2021018209 A1 WO2021018209 A1 WO 2021018209A1
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- dmrs
- dmrs port
- cdm group
- port set
- port
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
- H04L5/0008—Wavelet-division
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0016—Time-frequency-code
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
Definitions
- This application relates to the field of communication technology, and in particular to a method and device for indicating a demodulation reference signal (DMRS) port.
- DMRS demodulation reference signal
- DMRS port When scheduling data, such as physical downlink shared channel (PDSCH) data, network equipment needs to indicate the corresponding DMRS port, including the number of DMRS ports and the DMRS port number.
- the DMRS ports corresponding to different DMRS port numbers are orthogonal of. Among them, the number of DMRS ports is equal to the number of transmission layers of PDSCH data. If different terminal devices occupy the same time-frequency resource to receive PDSCH data, the network device needs to allocate different DMRS port numbers to ensure DMRS orthogonality.
- DMRS is divided into two types, and the orthogonal frequency division multiple access (OFDM) symbol length occupied by the front DMRS can be 1 or 2.
- the front DMRS occupies the starting position of the PDSCH .
- DMRS ports 0, 1, 4, and 5 are code division multiplexing (CDM) group 1
- DMRS ports 2, 3, 6, and 7 are CDM group 2.
- CDM group 1 When the number of symbols is 1, DMRS port 0, 1 is CDM group 1, DMRS port 2, 3 is CDM group 2.
- Type 1 DMRS supports up to 8 layers of transmission. For example, terminal device 1 uses layer 4 and terminal device 2 uses layer 4 pairing, or terminal device 1 to terminal device 8 each use layer 1 pairing. At the same time, it is now stipulated in the agreement.
- Type 2 when the number of symbols is 2, DMRS ports 0, 1, 6, 7 are CDM group 1, DMRS ports 2, 3, 8, 9 are CDM group 2, and DMRS ports 4, 5, 10, 11 are CDM Group 3.
- Type 2 DMRS supports up to 12 layers of transmission.
- NC-JT non-coherent joint transmission
- CoMP coordinated multiple points transmission/reception
- the DMRS ports corresponding to different network devices need to occupy different CDMs. group.
- the combination of DMRS port indications in the existing protocol cannot satisfy NC-JT transmission.
- the combination of DMRS port indications in the existing protocol cannot indicate different NC-JT transmission mechanisms.
- NC-JT transmission can use space division multiplexing, time/frequency division multiplexing, and space division at the same time.
- the DMRS port needs to be used to indicate the transmission mechanism used in the current transmission.
- This application provides a DMRS port indication method and device to satisfy transmission under NC-JT.
- this application provides a DMRS port indication method, the method includes: a network device determines DMRS port indication information, and sends the DMRS port indication information; wherein the DMRS port indication information is used to indicate a DMRS port set
- the DMRS port set is one of a plurality of DMRS port sets, and at least one DMRS port set in the plurality of DMRS port sets includes a DMRS port belonging to a plurality of CDM groups, and in the plurality of DMRS port sets
- the number of codewords corresponding to each DMRS port set is 1; some or all of the DMRS port sets in the multiple DMRS port sets are the first DMRS port set, and each first DMRS port set includes at least the first DMRS port set.
- the DMRS port indicated by the network device to the terminal device can satisfy the transmission under NC-JT.
- the DMRS ports belonging to the first CDM group and the ports of the first RS are QCL
- the DMRS ports belonging to the second CDM group and the ports of the second RS are QCL
- the first RS It is different from the second RS.
- the first DMRS port set may include at least three of the following:
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1, and the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 2, and the two DMRS ports belonging to the first CDM group are the two DMRS ports with the largest port numbers in the first CDM group Port, the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the first CDM group in the first port set is equal to 2, and the two DMRS ports belonging to the first CDM group are the two DMRS ports with the largest port numbers in the first CDM group ,
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 2, and the 2 DMRS ports belonging to the second CDM group are the largest port numbers in the second CDM group 2 DMRS ports;
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 2, and the two DMRS ports belonging to the second CDM group are the two DMRS ports with the largest port numbers in the second CDM group Port, the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1.
- the first DMRS port set may further include at least one of the following:
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 3, and the 3 DMRS ports belonging to the first CDM group are the 3 DMRS ports with the largest port numbers in the first CDM group Port, the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 3, and the 3 DMRS ports belonging to the second CDM group are the 3 DMRS ports with the largest port numbers in the second CDM group Port, the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1.
- the transmission on the corresponding PDSCH is multi-user multiple input multiple output (MU-MIMO) transmission.
- MU-MIMO multi-user multiple input multiple output
- the transmission on the corresponding PDSCH is single User Multiple Input Multiple Output (SU-MIMO) transmission; when the DMRS port set indicated by the DMRS port indication information is the first DMRS port set and the number of corresponding pre-DMRS symbols is 2, then the corresponding The transmission on PDSCH is multi-user multiple input multiple output (MU-MIMO) transmission.
- SU-MIMO User Multiple Input Multiple Output
- this application provides a DMRS port indication method, the method includes: a terminal device receives DMRS port indication information, and determines a DMRS port according to the DMRS port indication information; wherein the DMRS port indication information is used to indicate the DMRS Port set; wherein, the DMRS port set is one of a plurality of DMRS port sets, and at least one DMRS port set in the plurality of DMRS port sets includes a DMRS port belonging to a plurality of CDM groups; the plurality of DMRS ports The number of codewords corresponding to each port set in the set is 1; part or all of the DMRS port sets of the multiple DMRS port sets are the first DMRS port set, and each first DMRS port set includes at least the first DMRS port set.
- the DMRS ports belonging to the first CDM group and the ports of the first RS are QCL
- the DMRS ports belonging to the second CDM group and the ports of the second RS are QCL
- the first RS It is different from the second RS.
- the first DMRS port set may include at least three of the following:
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1, and the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 2, and the two DMRS ports belonging to the first CDM group are the two DMRS ports with the largest port numbers in the first CDM group Port, the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the first CDM group in the first port set is equal to 2, and the two DMRS ports belonging to the first CDM group are the two DMRS ports with the largest port numbers in the first CDM group ,
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 2, and the 2 DMRS ports belonging to the second CDM group are the largest port numbers in the second CDM group 2 DMRS ports;
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 2, and the two DMRS ports belonging to the second CDM group are the two DMRS ports with the largest port numbers in the second CDM group Port, the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1.
- the first DMRS port set may further include at least one of the following:
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 3, and the 3 DMRS ports belonging to the first CDM group are the 3 DMRS ports with the largest port numbers in the first CDM group Port, the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 3, and the 3 DMRS ports belonging to the second CDM group are the 3 DMRS ports with the largest port numbers in the second CDM group Port, the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1.
- the transmission on the corresponding PDSCH is multi-user multiple input multiple output (MU-MIMO) transmission.
- MU-MIMO multi-user multiple input multiple output
- the transmission on the corresponding PDSCH is single User Multiple Input Multiple Output (SU-MIMO) transmission; when the DMRS port set indicated by the DMRS port indication information is the first DMRS port set and the number of corresponding pre-DMRS symbols is 2, then the corresponding The transmission on PDSCH is multi-user multiple input multiple output (MU-MIMO) transmission.
- SU-MIMO User Multiple Input Multiple Output
- this application provides a DMRS port indication method, the method includes: a network device determines DMRS port indication information, and sends the DMRS port indication information; wherein, the DMRS port indication information is used to indicate a DMRS port set;
- the DMRS port set is one of multiple DMRS port sets, some of the DMRS port sets in the multiple DMRS port sets are a first DMRS port set, and the DMRS ports included in the first DMRS port set belong to multiple A CDM group, part of the DMRS port set in the multiple DMRS port sets is a second DMRS port set, and the DMRS ports included in the second DMRS port set belong to the same CDM group;
- the first DMRS port set is used for It indicates that the QCL information used for transmitting the corresponding PDSCH on different time units or frequency domain units is the same, and the second DMRS port set is used to indicate that the QCL information used for transmitting the corresponding PDSCH on different time units
- the device on the network also determines QCL indication information, and the QCL indication information indicates at least two pieces of QCL information.
- the DMRS port indicated by the DMRS port indication information is the first DMRS port set
- the DMRS and the corresponding data are received on each of the different time units or frequency domain units.
- the at least two QCL information when the DMRS port indicated by the DMRS port indication information is the second DMRS port set, the DMRS is received on each of the different time units or frequency domain units and the corresponding data is adopted One of the at least two QCL information.
- the different time units are located in the same slot, and each time unit of the different time units includes the same number of OFDM symbols.
- the different time units are arranged sequentially in the time domain.
- the time interval between adjacent time units is N OFDM symbols, and N is a natural number.
- the different time units are located in different time slots (slots), and the different time units include the same OFDM symbols in the different slots.
- configuration signaling is used to indicate the number of time units.
- a QCL message is used to receive the DMRS and corresponding data in each time unit. Different QCL information is used to receive DMRS and corresponding data on adjacent time units.
- the DMRS port indicated by the DMRS port indication information is the first DMRS port set
- the DMRS port belonging to the first CDM group and the DMRS port belonging to the second CDM group in each time unit corresponds to different QCL information.
- the different frequency domain units are located in the same system bandwidth (bandwidth part (BWP)), or are located in the same component carrier (CC).
- BWP bandwidth part
- CC component carrier
- the DMRS and corresponding data sent in each frequency domain unit adopt the same beamforming manner.
- the DMRS port indicated by the DMRS port indication information is the second DMRS port set
- one QCL message is used to receive DMRS and corresponding data on each frequency domain unit.
- different QCL information is used to receive DMRS and corresponding data on adjacent frequency domain units.
- the DMRS port indicated by the DMRS port indication information is the first DMRS port set
- the DMRS port belonging to the first CDM group and the DMRS port belonging to the second CDM group in each frequency domain unit DMRS port corresponds to different QCL information.
- the PDSCHs on the different time units or frequency domain units correspond to a redundancy version or codeword of the same TB.
- the PDSCHs on the different time units or frequency domain units correspond to different redundancy versions or different codewords of the same TB.
- the DCI downlink control information
- the DCI includes two modulation and coding scheme (MCS) indication fields and two redundancy version RV indication fields.
- MCS modulation and coding scheme
- the first MCS indicates The field and the first RV indicator field are used to indicate the MCS and RV of the TB
- the second MCS indicator field and the second RV indicator field are used to indicate the deactivation of the second codeword, such as indicating the MCS index value 26 and the RV index The value is 1.
- the DCI for scheduling the TB indicates that two codewords are activated, it indicates that the PDSCH on the different time units or frequency domain units corresponds to different redundancy versions or codewords of the same TB.
- the DCI includes two modulation and coding mode MCS indicator fields and two redundancy version RV indicator fields.
- the first MCS indicator field and the first RV indicator The field is used to indicate one MCS and RV of the TB, and the second MCS indicator field and the second RV indicator field are used to indicate another MCS and RV of the TB.
- the first MCS indicator field corresponds to some frequency domain units.
- the second MCS indication field corresponds to the remaining frequency domain units except for the part of the frequency domain units.
- the maximum number of preamble DMRS symbols is configured as 1.
- the maximum number of codewords is configured as 2.
- the transmission on the corresponding PDSCH is single-user multiple Input multiple output (SU-MIMO) transmission.
- the first DMRS port set includes a DMRS port set ⁇ 0, 2 ⁇
- the second DMRS port set includes a DMRS port set ⁇ 0 ⁇ , or further includes a DMRS port set ⁇ 0, 1 ⁇ .
- the transmission on the corresponding PDSCH is multi-user multiple input multiple output (MU-MIMO) transmission.
- the second DMRS port set includes DMRS port sets ⁇ 0 ⁇ and ⁇ 1 ⁇ , or also includes DMRS port sets ⁇ 0, 1 ⁇ .
- this application provides a DMRS port indication method, the method includes: a terminal device receives DMRS port indication information, and determines a DMRS port according to the DMRS port indication information; wherein, the DMRS port indication information is used to indicate DMRS Port set; wherein, the DMRS port set is one of a plurality of DMRS port sets, some of the DMRS port sets in the plurality of DMRS port sets are a first DMRS port set, and the first DMRS port set includes DMRS Ports belong to multiple CDM groups, some of the DMRS port sets in the multiple DMRS port sets are a second DMRS port set, and the DMRS ports included in the second DMRS port set belong to the same CDM group; the first DMRS port The set is used to indicate that the QCL information used for transmitting the corresponding PDSCH on different time units or frequency domain units is different, and the second DMRS port set is used to indicate the QCL information used for transmitting the DMRS port set;
- the terminal device also receives QCL indication information, and the QCL indication information indicates at least two pieces of QCL information.
- the terminal device also determines the mapping relationship between different time units or frequency domain units and QCL information according to the DMRS port indication information.
- the DMRS port indicated by the DMRS port indication information is the first DMRS port set
- the DMRS and the corresponding data are received on each of the different time units or frequency domain units.
- the at least two QCL information when the DMRS port indicated by the DMRS port indication information is the second DMRS port set, the DMRS is received on each of the different time units or frequency domain units and the corresponding data is adopted One of the at least two QCL information.
- the different time units are located in the same slot, and each time unit of the different time units includes the same number of OFDM symbols.
- the different time units are arranged sequentially in the time domain.
- the time interval between adjacent time units is N OFDM symbols, and N is a natural number.
- the different time units are located in different time slots (slots), and the different time units include the same OFDM symbols in the different slots.
- configuration signaling is used to indicate the number of time units.
- a QCL message is used to receive the DMRS and corresponding data in each time unit. Different QCL information is used to receive DMRS and corresponding data on adjacent time units.
- the DMRS port indicated by the DMRS port indication information is the first DMRS port set
- the DMRS port belonging to the first CDM group and the DMRS port belonging to the second CDM group in each time unit corresponds to different QCL information.
- the different frequency domain units are located in the same system bandwidth (bandwidth part (BWP)), or are located in the same component carrier (CC).
- BWP bandwidth part
- CC component carrier
- the DMRS and corresponding data sent in each frequency domain unit adopt the same beamforming manner.
- the DMRS port indicated by the DMRS port indication information is the second DMRS port set
- one QCL message is used to receive DMRS and corresponding data on each frequency domain unit.
- different QCL information is used to receive DMRS and corresponding data on adjacent frequency domain units.
- the DMRS port indicated by the DMRS port indication information is the first DMRS port set
- the DMRS port belonging to the first CDM group and the DMRS port belonging to the second CDM group in each frequency domain unit DMRS port corresponds to different QCL information.
- the PDSCHs on the different time units or frequency domain units correspond to a redundancy version or codeword of the same TB.
- the PDSCHs on the different time units or frequency domain units correspond to different redundancy versions or different codewords of the same TB.
- the downlink control information DCI for scheduling the TB when the downlink control information DCI for scheduling the TB only indicates that one codeword is activated, it indicates that the PDSCH on the different time unit or frequency domain unit corresponds to a redundancy version of the same TB or numbers.
- the DCI includes two modulation and coding mode MCS indication fields and two redundancy version RV indication fields.
- the first MCS indication field and the first RV indication When the DCI only indicates to activate one codeword, the first MCS indication field and the first RV indication The fields are used to indicate the MCS and RV of the TB, and the second MCS indicator field and the second RV indicator field are used to indicate the deactivation of the second codeword, such as indicating the MCS index value 26 and the RV index value 1.
- the DCI for scheduling the TB indicates that two codewords are activated, it indicates that the PDSCH on the different time units or frequency domain units corresponds to different redundancy versions or codewords of the same TB.
- the DCI includes two modulation and coding mode MCS indication fields and two redundancy version RV indication fields.
- the first MCS indication field and the first RV indication The field is used to indicate one MCS and RV of the TB, and the second MCS indicator field and the second RV indicator field are used to indicate another MCS and RV of the TB.
- the first MCS indicator field corresponds to some frequency domain units.
- the second MCS indication field corresponds to the remaining frequency domain units except for the part of the frequency domain units.
- the maximum number of preamble DMRS symbols is configured as 1.
- the maximum number of codewords is configured as 2.
- the transmission on the corresponding PDSCH is single-user multiple Input multiple output (SU-MIMO) transmission.
- the first DMRS port set includes a DMRS port set ⁇ 0, 2 ⁇
- the second DMRS port set includes a DMRS port set ⁇ 0 ⁇ , or further includes a DMRS port set ⁇ 0, 1 ⁇ .
- the transmission on the corresponding PDSCH is multi-user multiple input multiple output (MU-MIMO) transmission.
- the second DMRS port set includes DMRS port sets ⁇ 0 ⁇ and ⁇ 1 ⁇ , or also includes DMRS port sets ⁇ 0, 1 ⁇ .
- the present application also provides a communication device.
- the communication device may be a network device and has the function of implementing the network device in the method example of the first aspect.
- the function can be realized by hardware, or by hardware executing corresponding software.
- the hardware or software includes one or more modules corresponding to the above-mentioned functions.
- the structure of the communication device includes a processing unit and a transceiving unit. These units can perform the corresponding functions in the method example of the first aspect. For details, please refer to the detailed description in the method example, which will not be repeated here. .
- the structure of the communication device includes a transceiver and a processor, and optionally may also include a memory.
- the transceiver is used to send and receive data and communicate with other devices in the system.
- the processor is configured To support the communication device to perform the corresponding function of the network device in the method of the first aspect.
- the memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.
- the present application also provides a communication device.
- the communication device may be a terminal device and has the function of implementing the terminal device in the method example of the second aspect.
- the function can be realized by hardware, or by hardware executing corresponding software.
- the hardware or software includes one or more modules corresponding to the above-mentioned functions.
- the structure of the communication device includes a processing unit and a transceiving unit. These units can perform the corresponding functions in the method example of the second aspect. For details, please refer to the detailed description in the method example, which will not be repeated here. .
- the structure of the communication device includes a transceiver and a processor, and optionally may also include a memory.
- the transceiver is used to send and receive data and communicate with other devices in the system.
- the processor is configured To support the communication device to perform the corresponding function of the terminal device in the above-mentioned second aspect method.
- the memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.
- the present application also provides a communication device.
- the communication device may be a network device and has the function of implementing the network device in the method example of the third aspect.
- the function can be realized by hardware, or by hardware executing corresponding software.
- the hardware or software includes one or more modules corresponding to the above-mentioned functions.
- the structure of the communication device includes a processing unit and a transceiving unit. These units can perform the corresponding functions in the method example of the third aspect. For details, please refer to the detailed description in the method example, which will not be repeated here. .
- the structure of the communication device includes a transceiver and a processor, and optionally may also include a memory.
- the transceiver is used to send and receive data and communicate with other devices in the system.
- the processor is configured To support the communication device to perform the corresponding function of the network device in the above-mentioned third aspect method.
- the memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.
- the present application also provides a communication device.
- the communication device may be a terminal device and has the function of implementing the terminal device in the method example of the fourth aspect.
- the function can be realized by hardware, or by hardware executing corresponding software.
- the hardware or software includes one or more modules corresponding to the above-mentioned functions.
- the structure of the communication device includes a processing unit and a transceiving unit. These units can perform the corresponding functions in the method example of the fourth aspect. For details, please refer to the detailed description in the method example, which will not be repeated here. .
- the structure of the communication device includes a transceiver and a processor, and optionally may also include a memory.
- the transceiver is used to send and receive data and communicate with other devices in the system.
- the processor is configured To support the communication device to perform the corresponding function of the terminal device in the above-mentioned fourth aspect method.
- the memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.
- this application also provides a communication system, which includes at least one terminal device and network device mentioned in the above design. Further, the network device in the communication system may execute any method executed by the network device in the foregoing method, and the terminal device in the communication system may execute any method executed by the terminal device in the foregoing method method.
- this application provides a computer storage medium that stores computer-executable instructions, and the computer-executable instructions are used to make the computer execute any of the above when called by the computer.
- kind of method
- this application provides a computer program product containing instructions, which when run on a computer, causes the computer to execute any of the above methods.
- the present application provides a chip, which is coupled with a memory, and is configured to read and execute program instructions stored in the memory to implement any of the above methods.
- FIG. 1 is a schematic diagram of the architecture of a communication system provided by this application.
- FIG. 2 is a schematic diagram of a type of DMRS provided by this application.
- FIG. 3 is a schematic diagram of a CDM group provided by this application.
- Figure 4a is a schematic diagram of a transmission solution provided by this application.
- FIG. 4b is a schematic diagram of another transmission scheme provided by this application.
- Figure 5a is a schematic diagram of a transmission scheme provided by this application.
- FIG. 5b is a schematic diagram of another transmission scheme provided by this application.
- FIG. 6 is a flowchart of a DMRS port indication method provided by this application.
- FIG. 7 is a flowchart of an example of a DMRS port indication method provided by this application.
- FIG. 8 is a flowchart of another DMRS port indication method provided by this application.
- FIG. 9 is a schematic diagram of a corresponding relationship between QCL information and time domain resources provided by this application.
- FIG. 10 is a schematic diagram of a corresponding relationship between QCL information and frequency domain resources provided by this application.
- FIG. 11 is a schematic diagram of another corresponding relationship between QCL information and time domain resources provided by this application.
- FIG. 12 is a schematic diagram of another corresponding relationship between QCL information and frequency domain resources provided by this application.
- FIG. 13 is a schematic structural diagram of a communication device provided by this application.
- FIG. 14 is a structural diagram of a communication device provided by this application.
- the embodiments of the present application provide a DMRS port indication method and device to satisfy transmission under NC-JT.
- the method and device described in the present application are based on the same inventive concept. Since the method and the device have similar principles for solving the problem, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
- FIG. 1 shows the architecture of a possible communication system to which the DMRS port indication method provided by an embodiment of the present application is applicable.
- the architecture of the communication system includes network equipment and terminal equipment, where:
- the network device is a device with a wireless transceiver function or a chip that can be installed in the network device.
- the network device includes but not limited to: gNB, radio network controller (RNC), Node B (Node B, NB) ), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), The access point (AP), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point, TP) in the wireless fidelity (WIFI) system, etc. It may be a network node that constitutes a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU).
- RNC radio network controller
- Node B Node B
- BSC base station controller
- BTS base transceiver station
- BTS home base station
- BBU baseband unit
- the gNB may include a centralized unit (CU) and a DU.
- the gNB may also include a radio unit (RU).
- CU implements some functions of gNB
- DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer functions
- DU implements wireless link
- RRC radio resource control
- PDCP packet data convergence protocol
- DU implements wireless link
- RLC radio link control
- MAC media access control
- PHY physical
- the network device may be a CU node, or a DU node, or a device including a CU node and a DU node.
- the CU can be divided into network equipment in the access network RAN, or the CU can be divided into network equipment in the core network CN, which is not limited.
- the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment , User agent or user device.
- the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, and transportation safety ( Wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes.
- terminal devices with wireless transceiver functions and chips that can be set in the aforementioned terminal devices are collectively referred to as terminal devices.
- the communication system shown in Figure 1 can be, but is not limited to, a fifth generation (5th Generation, 5G) system, such as a new generation of radio access technology (NR).
- 5G fifth generation
- NR radio access technology
- this application is also applicable to various future communication systems, such as 6G systems or other communication networks.
- the network device When scheduling data, such as PDSCH data, the network device needs to indicate the corresponding DMRS port, including the number of DMRS ports and the DMRS port number.
- the physical resources occupied by the DMRS ports corresponding to different DMRS port numbers are orthogonal, and the physical resources include space One or more of resources, time domain resources, and frequency domain resources.
- the number of DMRS ports is equal to the number of transmission layers of PDSCH data, and each DMRS port has a one-to-one correspondence with each transmission layer.
- channel estimation needs to be performed on the corresponding DMRS port.
- the network device needs to allocate different DMRS port numbers to ensure DMRS orthogonality.
- the DMRS pattern in NR is divided into two types. In each type, the OFDM symbol length occupied by the DMRS can be 1 or 2, and the two types of DMRS can be as shown in FIG. 2.
- the OFDM symbol length (also known as the number of symbols) occupied by DMRS is 1 and 2.
- the maximum OFDM symbol length occupied by the pre-DMRS is controlled by radio resource control. , RRC) indicates that each maximum OFDM symbol length corresponds to a table of DMRS port indications, as shown in Tables 1 and 2.
- RRC radio resource control
- Table 1 the maximum number of OFDM symbols is 1, and in Table 2, the maximum number of OFDM symbols is 2.
- DMRS ports 0, 1, 4, and 5 are CDM group 1
- DMRS ports 2, 3, 6, and 7 are CDM group 2.
- CDM group 1 and CDM group 2 can be as shown in Figure 3.
- the schematic is shown.
- the DMRS ports belonging to CDM group 1 and CDM group 2 can occupy different time-frequency resources, but the DMRS ports in the two CDM groups occupy the same time-frequency resources.
- Different DMRS ports use different codes (code ) Distinction, such as using Walsh code (Walsh-Hadamard code) or using orthogonal cover code (OCC).
- code codes
- Walsh code Walsh code
- OCC orthogonal cover code
- Type 1 DMRS supports up to 8 layers of pairing transmission. For example, terminal device 1 uses layer 4 and terminal device 2 uses layer 4 pairing, or terminal device 1 to terminal device 8 each use layer 1 pairing.
- the number of CDM groups that do not carry data is used to indicate the frequency domain resources that can be used to carry data on the symbols occupied by the DMRS. For example, a number of 1 indicates that the DMRS may occupy the frequency domain resources corresponding to CDM group 1, but CDM group 2 The corresponding frequency domain resources are used to transmit data. For example, the number is 2, indicating that the DMRS may occupy the frequency domain resources corresponding to CDM groups 1 and 2. Since CDM groups 1 and 2 occupy all frequency domain resources on the DMRS symbols, this The DMRS symbol is not used to transmit data.
- Type 2 As shown in the right two diagrams in Figure 1, similarly, the OFDM symbol length occupied by DMRS is 1 and 2.
- DMRS ports 0, 1, 6, 7 are CDM group 1
- DMRS ports 2, 3 , 8, 9 are CDM group 2
- DMRS ports 4, 5, 10, 11 are CDM group 3.
- Type 2 DMRS supports up to 12 layers of paired transmission.
- each OFDM symbol length corresponds to a table of DMRS port indication, as shown in Tables 3 and 4 below.
- the terminal device can communicate with at least one network device at the same time, that is, receive data from multiple network devices at the same time.
- This transmission mode is called coordinated multiple points transmission/recetion (CoMP).
- the at least one network device forms a cooperating set to communicate with the terminal device simultaneously.
- the network devices in the cooperation set can each connect to different control nodes, and each control node can exchange information, such as exchanging scheduling policy information to achieve the purpose of cooperative transmission, or the network devices in the cooperation set are all connected to the same control node
- the control node receives the channel state information (such as CSI or RSRP) reported by the terminal devices collected by the network devices in the cooperating set, and performs unified scheduling on the terminal devices in the cooperating set according to the channel state information of all terminal devices in the cooperating set, Then the scheduling strategy is exchanged to the network equipment connected to it, and then each network equipment notifies the respective terminal equipment through the DCI signaling carried by the PDCCH.
- the CoMP transmission mode can include:
- DPS Dynamic Point Switching
- Non-coherent joint transmission Multiple network devices transmit data for a terminal device at the same time, and the antennas of multiple network devices perform independent precoding, that is, each network device independently selects the optimal precoding
- the coding matrix performs joint phase and amplitude weighting between the antennas of the network equipment. This mechanism does not require phase calibration of the antennas of multiple network equipment;
- serving network device in the network devices in the cooperating set, such as serving TRP/serving cell.
- the role of the serving base station is to make data communication scheduling decisions for the terminal device and perform MAC with the terminal device Layer and physical layer communication, such as determining the time-frequency resources of the control channel (PDCCH) and data channel (PUSCH/PDSCH) of the terminal device according to scheduling decisions, and sending DCI signaling in the PDCCH, and sending data in the PUSCH/PDSCH, Send reference signal (reference signal, RS) and so on.
- the serving base station in the cooperative set the rest of the network devices are called coordinate TRP/coordinated cell (coordinate TRP).
- the role of the coordinated base station is to perform physical layer communication with the terminal device according to the scheduling decision of the serving base station.
- DCI signaling is sent in PDCCH
- data is sent in PUSCH/PDSCH
- RS is sent, and so on.
- the serving base station is TRP1
- the cooperative base station is TRP2.
- TRP1 is used as the serving base station to make scheduling decisions for the terminal device and send DCI.
- the DCI can instruct to schedule TRP1/TRP2 for data transmission, that is, the DCI carries two TRP Scheduling information.
- the DMRS ports corresponding to the PDSCHs transmitted by the two TRPs need to occupy different CDM groups, and each CDM group/each PDSCH corresponds to a TCI state.
- the TCI status is used to indicate quasi-co-location (QCL) hypothetical information (also known as QCL information).
- QCL hypothesis information is used to assist in describing the beamforming information on the receiving side of the terminal equipment and the receiving process.
- QCL type types
- A Doppler shift, Doppler spread (doppler spread) , Average channel delay (average delay), delay spread (delay spread);
- QCL types B doppler shift, doppler spread;
- QCL types C average delay, doppler shift;
- QCL types D spatial reception parameters (spatial rx parameters) .
- the QCL information indication of the PDSCH or PDCCH is satisfied by indicating the DM-RS port of the PDCCH (or PDSCH) and one or more reference signal resources.
- the QCL assumes the relationship, so that the aforementioned QCL information can be obtained through the associated one or more reference signal resources and the PDSCH or PDCCH can be received using the information.
- the reference signal may be a channel state information reference signal (CSI-RS).
- CSI-RS channel state information reference signal
- the above-mentioned DM-RS and CSI-RS have the same QCL Type D assumption, then the above-mentioned DM-RS and The CSI-RS have the same receiving beam, so based on the associated reference signal resource index, the UE can infer the receiving beam information for receiving the PDCCH (or PDSCH).
- the QCL information is a spatial characteristic parameter, which describes the spatial channel characteristic between the antenna ports contained in the two related reference signals, and helps the terminal device to complete the receiving-side beamforming or receiving processing process according to the QCL information.
- Solution 1 Use multiple transmission ports to transmit data, and each transmission port corresponds to different QCL information (that is, corresponds to a different TRP).
- QCL information that is, corresponds to a different TRP.
- the specific solution can be shown in Figure 4a and Figure 4b.
- Solution one As shown in Figure 4a, a resource block (TB) is encoded and mapped to the transport layer.
- the transport layer corresponds to a DMRS port (which can be understood as a traditional single TRP transmission).
- the same TB After another encoding method is mapped to another transport layer, the transport layer corresponds to another DMRS port (it can be understood that the two ports correspond to two repeated transmissions);
- Solution 2 Use multiple time-frequency units to transmit data, and each time-frequency unit corresponds to different QCL information, and each time-frequency unit can correspond to orthogonal time-frequency resources.
- the specific solution is:
- the QCL information corresponding to the domain or time domain resources is different.
- the base station indicates two QCL messages and four non-overlapping time units. Then the two QCL messages alternately correspond to adjacent time units, and each time unit All correspond to all the information bits of the same TB;
- each part of the information bits of the same TB are mapped on different frequency domain or time domain resources, and different frequency domain or time domain resources correspond to different QCL information, for example, the base station indicates If two QCL messages indicate four non-overlapping time units, the two QCL messages alternately correspond to adjacent time units, and all time units correspond to all information bits of one TB.
- an embodiment of the present application provides a DMRS port indication method.
- the specific process of the method can include:
- Step 601 The network device determines DMRS port indication information.
- the DMRS port indication information is used to indicate a DMRS port set; wherein the DMRS port set is one of a plurality of DMRS port sets, and at least one DMRS port set of the plurality of DMRS port sets includes a DMRS
- the port belongs to multiple CDM groups, and the number of codewords corresponding to each DMRS port set in the multiple DMRS port sets is one; some or all of the DMRS port sets in the multiple DMRS port sets are the first DMRS port set
- Each of the first DMRS port sets includes at least the DMRS port with the largest port number in the first CDM group and the DMRS port with the largest port number in the second CDM group.
- the first CDM group may be CDM group 1 shown in FIG. 3, and the DMRS port number with the largest port number in the first CDM group may be 5; and the second CDM group may be the CDM group shown in FIG. In CDM group 2, the DMRS port number with the largest port number in the second CDM group is 7.
- the all possible CDM groups all represent CDM group 1
- the second CDM groups all represent CDM group 2.
- the first CDM group and the second CDM group can also There are other possibilities, but they are not described in detail in the embodiments of this application.
- the DMRS ports belonging to the first CDM group and the ports of the first RS are QCL
- the DMRS ports belonging to the second CDM group and the ports of the second RS are QCL
- the first RS and the second RS are different.
- the first DMRS port set may include at least three of the following:
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1, and the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the first set of DMRS ports that can be output may be ⁇ 5, 7 ⁇ ;
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 2, and the two DMRS ports belonging to the first CDM group are the two DMRS ports with the largest port numbers in the first CDM group Ports, the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1, and one of the first DMRS port sets shown in this case may be ⁇ 4, 5, 7 ⁇ ;
- the number of DMRS ports belonging to the first CDM group in the first port set is equal to 2, and the two DMRS ports belonging to the first CDM group are the two DMRS ports with the largest port numbers in the first CDM group ,
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 2, and the 2 DMRS ports belonging to the second CDM group are the largest port numbers in the second CDM group 2 DMRS ports; in this case, the first set of DMRS ports may be ⁇ 4, 5, 6, 7 ⁇ ;
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 2, and the two DMRS ports belonging to the second CDM group are the two DMRS ports with the largest port numbers in the second CDM group Port, the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1.
- One of the first DMRS port sets shown in this case may be ⁇ 5, 6, 7 ⁇ .
- the first DMRS port set may further include at least one of the following in addition to the above possible situations:
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 3, and the 3 DMRS ports belonging to the first CDM group are the 3 DMRS ports with the largest port numbers in the first CDM group Port, the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to one; in this case, the first DMRS port set may be ⁇ 1, 4, 5, 7 ⁇ ;
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 3, and the 3 DMRS ports belonging to the second CDM group are the 3 DMRS ports with the largest port numbers in the second CDM group Port, the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1; in this case, the first DMRS port set may be ⁇ 5, 3, 6, 7 ⁇ .
- the plurality of DMRS port number sets are in addition to the first DMRS port number set , Can also include one or more of the following DMRS port sets: ⁇ 0,1,2,3 ⁇ , ⁇ 0,1,4,2 ⁇ , ⁇ 1,4,3 ⁇ , ⁇ 0,1,2, , ⁇ 5, 7 ⁇ , ⁇ 4, 6 ⁇ , ⁇ 0, 2 ⁇ , ⁇ 1, 3 ⁇ .
- the multiple DMRS port sets may exist in the form of a table. Based on the foregoing description, the multiple DMRS port sets may be as shown in Table 5 below. It should be understood that the multiple DMRS port sets shown in Table 5 are only a specific form of expression, and the multiple DMRS port sets may also have other forms of existence, which are not listed here in this application, such as The actual content corresponding to each index value may vary, but should include the DMRS port combination type in the table.
- the number of OFDM symbols occupied by the pre-DMRS corresponding to any port set shown in Table 5 above is 2, where the symbol length occupied by the pre-DMRS is used to indicate the symbol length occupied by the DMRS before the first data, so
- the DMRS is the DMRS of the first data.
- the number of CDM groups that do not carry data corresponding to any port set shown in Table 5 above is 2, where the number of CDM groups that do not carry data is used to indicate that the OFDM symbols occupied by the DMRS are not used to carry CDM. The number of groups.
- the first DMRS port set may include the DMRS port sets whose indexes are 2, 3, 4, 5, 6, and 8 in Table 5 above.
- the multiple DMRS port sets may also only include the DMRS port sets whose indexes are 0, 2, 5, 6, 7, and 8 in Table 5 above.
- the advantage of the above-mentioned DMRS port set design is that it uses as few DMRS port sets as possible and supports flexible port allocation to meet the needs of MU-MIMO between different users.
- the multiple port sets may also include DMRS port sets with indexes 0, 1, 4, 6, 7, 8, and 9 in Table 5 above.
- multiple DMRS port sets may only include part of the DMRS port sets in Table 5 above, and there may also be other cases, which will not be listed here.
- the order of the indexes in the foregoing Table 5 is only an example. In practice, the order of the DMRS port number set is not limited to the order in Table 5, which is not limited in this application. In addition, the order of the DMRS ports in each DMRS port set is just an example, and the DMRS ports in each DMRS port set can be arranged in a random order, which is not limited in this application.
- the number of OFDM symbols occupied by the pre-DMRS corresponding to any DMRS port set in Table 6 is 1; the number of CDM groups that do not carry data corresponding to any DMRS port set is 2.
- the terminal device assumes that the transmission at this time is SU-MIMO, that is, the DMRS port and data port not allocated to the UE on the time-frequency resources allocated to the UE Will not be allocated to other users; when indicating the remaining entries, the terminal equipment assumes that the transmission at this time is MU-MIMO, that is, the DMRS ports and data that are not allocated to the UE on the time-frequency resources allocated to the UE The port is assigned to another user.
- SU-MIMO that is, the DMRS port and data port not allocated to the UE on the time-frequency resources allocated to the UE Will not be allocated to other users
- MU-MIMO that is, the DMRS ports and data that are not allocated to the UE on the time-frequency resources allocated to the UE The port is assigned to another user.
- the number of OFDM symbols occupied by the pre-DMRS corresponding to some DMRS port sets in Table 7 is 1 and the number of corresponding CDM groups that do not carry data is 1; the number of OFDM symbols occupied by the pre-DMRS corresponding to some DMRS port sets is 1 and the number of corresponding CDM groups that do not carry data is 2.
- the transmission on the corresponding PDSCH is SU-MIMO, and when all When the port set indicated by the DMRS port indication information is the port set corresponding to the other indexes, the transmission on the corresponding PDSCH is MU-MIMO.
- the transmission on the corresponding PDSCH is a multi-user multiple input multiple output (MU -MIMO) transmission.
- MU -MIMO multi-user multiple input multiple output
- the DMRS port set further includes a second DMRS port set, and each port set in the second DMRS port set includes only one DMRS port in the CDM, then when the DMRS port set When the port set indicated by the indication information is the second DMRS port set, the transmission on the corresponding PDSCH is SU-MIMO.
- Table 5 also includes the second DMRS port set.
- the DMRS port set indicated by the DMRS port indication information is the first DMRS port set and the corresponding number of pre-DMRS symbols is 1, then the corresponding PDSCH The transmission of is single-user multiple-input multiple-output (SU-MIMO) transmission; when the DMRS port set indicated by the DMRS port indication information is the first DMRS port set and the number of corresponding pre-DMRS symbols is 2, Then the transmission on the corresponding PDSCH is multi-user multiple input multiple output (MU-MIMO) transmission.
- SU-MIMO single-user multiple-input multiple-output
- the transport layer corresponding to each DMRS port in the first DMRS port set is used to carry all the bits of the same TB.
- the transport layer corresponding to each DMRS port in the first DMRS port set is used to carry all the bits of the same TB.
- the DMRS port set corresponding to the index value indicated by the DMRS port indication information is the DMRS corresponding to the index value in Table 1-4
- the port set, when the number of QCL hypotheses indicated by the network device is 2, the DMRS port set corresponding to the index value indicated by the DMRS port indication information is the DMRS port set corresponding to the index value in Table 5-7.
- the DMRS port set corresponding to the index value indicated by the DMRS port indication information is the index values 1 and 2 in Table 6 or Table 7.
- the corresponding DMRS port and the corresponding data transmission are SU-MIMO, that is, the DMRS ports and data ports that are not allocated to the UE on the time-frequency resources allocated to the UE will not be allocated to other users.
- the DMRS port set corresponding to the index value indicated by the DMRS port indication information is the index value 1 and 2 in Table 7, then the corresponding DMRS port and the corresponding data transmission are MU- MIMO, that is, DMRS ports and data ports that are not allocated to the UE on the time-frequency resources allocated to the UE will be allocated to other users.
- a table formed by a set of the multiple DMRS ports is stored in the network device, and the network device may determine the DMRS port indication information in the stored table.
- Step 602 The network device sends the DMRS port indication information to the terminal device.
- Step 603 The terminal device determines a DMRS port according to the DMRS port indication information.
- the indication information is a table formed by a set of multiple DMRS ports, the indication information indicates one of the tables, the terminal device stores the table, and the terminal device according to The indication information is used to check the table to determine the DMRS port.
- the network device after performing step 602, the network device sends DMRS and related data to the DMRS port indicated by the DMRS port indication information; correspondingly, after step 603, the terminal device determines the The DMRS port receives DMRS and related data.
- the DMRS port indicated by the network device to the terminal device can satisfy the transmission under NC-JT.
- the embodiments of the present application provide an example of a DMRS port indication method. As shown in FIG. 7, the specific process of this example may include:
- Step 701 The network device determines DMRS port indication information 1 and DMRS port indication information 2.
- the DMRS port indication information 1 is used to indicate DMRS port set 1, and the DMRS port indication information 2 is used to indicate DMRS port set 2.
- the DMRS port set 1 is one of multiple DMRS port sets, and the DMRS port set 1 is another one of the multiple DMRS port sets.
- Step 702 The network device sends the DMRS port indication information 1 to the terminal device 1.
- Step 703 The network device sends the DMRS port indication information 2 to the terminal device 2.
- step 702 and step 703 can be exchanged, or step 702 and step 703 can be performed simultaneously, which is not limited in this application.
- Step 704 The terminal device 1 determines the DMRS port 1 according to the DMRS port indication information 1.
- Step 705 The terminal device 2 determines the DMRS port 2 according to the DMRS port indication information 1.
- step 704 and step 705 can also be exchanged, or step 702 can be performed first, then step 704, step 703, and then step 705 can be performed.
- the DMRS port set 1 and the DMRS port set 2 are determined by the network device in order to enable the terminal device 1 and the terminal device 2 to implement NC-JT transmission, so that the following
- the terminal device 1 may determine the DMRS port 1 based on the DMRS port indication information 1, so that the terminal device 2 determines the DMRS port 2 according to the DMRS port indication information 1, so as to realize the transmission under NC-JT.
- the network device sends DMRS and related data to the DMRS port indicated by the DMRS port indication information 1 after the DMRS port indication information 1; correspondingly, the terminal device 1 is determining the DMRS port 1 Afterwards, it is determined that the DMRS port 1 receives the DMRS and related data.
- the network device sends DMRS and related data to the DMRS port indicated by the DMRS port indication information 2 after the DMRS port indication information 2; correspondingly, the terminal device 2 determines the DMRS port 2 according to It is determined that the DMRS port 2 receives the DMRS and related data.
- the embodiment of the present application also provides another DMRS port indication method, which is applicable to the communication system shown in FIG. 1.
- the specific process of the method may include:
- Step 801 The network device determines the DMRS port indication information.
- the DMRS port indication information is used to indicate a DMRS port set; wherein, the DMRS port set is one of a plurality of DMRS port sets, and a part of the DMRS port set in the plurality of DMRS port sets is a second DMSR A port set, the DMRS ports included in the second DMRS port set belong to multiple CDM groups, some of the DMRS port sets in the multiple DMRS port sets are the third DMRS port set, and the DMRS included in the third DMRS port set The ports belong to the same CDM group;
- the second DMRS port set is used to indicate that the QCL information used for transmitting corresponding PDSCHs on different time units or frequency domain units is the same, and the third DMRS port set is used to indicate transmission on different time units or frequency domain units.
- the QCL information used by the corresponding PDSCH is different.
- the network device determines QCL indication information, where the QCL indication information is used to indicate the reception of the DMRS port and QCL information of the PDSCH corresponding to the DMRS port.
- the QCL indication information includes at least two pieces of QCL information, and the two pieces of QCL information are used to indicate that the DMRS port and the PDSCH corresponding to the DMRS port use the at least two pieces of QCL information.
- a part of the DMRS port adopts one of the at least two QCL messages to receive, and another part of the DMRS port adopts the other one of the at least two QCL messages to receive.
- all DMRS ports in the DMRS port use the at least two QCL information to receive, wherein the same DMRS port uses different QCL information to receive on different time units or frequency domain units.
- the DMRS port set indicated by the DMRS port indication information is the first DMRS port set
- the DMRS and corresponding data are received on each of the different time units or frequency domain units Both use the at least two QCL information
- the DMRS port set indicated by the DMRS port indication information is the second DMRS port set
- the data uses one of the at least two QCL information.
- the DMRS port indicated by the DMRS port indication information is the second DMRS port set
- different QCL information is used to receive DMRS and corresponding data on adjacent time units or frequency domain units.
- each time unit in the different time units includes at least one OFDM symbol and is located in the same time slot slot, and each time unit in the different time units includes an OFDM symbol The number is the same.
- the different time units are arranged sequentially in the time domain.
- the time interval between adjacent time units is N OFDM symbols, and N is a natural number.
- the different time units are located in different time slot slots, and the different time units include the same OFDM symbols in the different slots.
- the DMRS port indicated by the DMRS port indication information is the first DMRS port set
- the DMRS port belonging to the first CDM group and the DMRS port belonging to the second CDM group in each time unit DMRS port corresponds to different QCL information.
- the different frequency domain units are located in the same system bandwidth BWP, or are located in the same carrier CC.
- the configuration signaling is used to indicate the number of time units.
- each of the different frequency domain units includes at least one RB.
- the different frequency domain units are separated by M RBs in the frequency domain, and M is an integer greater than or equal to 0.
- the DMRS and corresponding data sent in each frequency domain unit adopt the same beamforming manner.
- one QCL message is used to receive the DMRS and corresponding data on each frequency domain unit.
- different QCL information is used to receive DMRS and corresponding data on adjacent frequency domain units in the frequency domain.
- the DMRS port indicated by the DMRS port indication information is the first DMRS port set
- the DMRS port belonging to the first CDM group in each frequency domain unit and the DMRS port belonging to the second CDM group corresponds to different QCL information.
- the network device determines that the QCL indication information indicates two QCL messages, and determines that the number of time units is 4.
- each time unit Both correspond to only one of the two QCL information.
- time units 1 and 3 correspond to QCL information 1
- time units 2 and 4 correspond to QCL information 2
- time units 1 and 2 correspond to QCL information 1
- time units 3 and 4 Corresponding to QCL information 2.
- each time unit corresponds to two QCL information.
- the DMRS port of CDM group 1 corresponds to QCL information 1
- the DMRS port of CDM group 2 corresponds to QCL information 2.
- the network device determines that the QCL indication information indicates two QCL information, and when the DMRS port indicated by the DMRS port indication information belongs to two CDM groups, all frequency domain units correspond to the two QCL information, for example, On each frequency domain unit, CDM group 1 corresponds to QCL information 1, and CDM group 2 corresponds to QCL information 2.
- the frequency domain unit here can be understood as a precoding resource group (PRG), and DMRS and corresponding data in each PRG
- PRG precoding resource group
- RBG resource block group
- the frequency domain resource allocation indication uses the RBG as the granularity. At this time, all scheduled RBs correspond to the same QCL information.
- different frequency domain units respectively correspond to one of the two QCL information.
- all scheduled RBs are divided into two frequency domain parts.
- the division method may be that all scheduled RBs are divided into multiple frequency domain units, the first frequency domain part includes part of the frequency domain units, and the second frequency domain part includes the part except the Frequency domain units other than frequency domain units, for example, two adjacent frequency domain units belong to different frequency domain parts, the DMRS port of the first frequency domain part corresponds to QCL information 1, and the DMRS port of the second frequency domain part corresponds to QCL information 2.
- Step 802 The network device sends the DMRS port indication information to the terminal device.
- the network device also sends the QCL indication information.
- Step 803 The terminal device determines a DMRS port according to the DMRS port indication information.
- the terminal device also receives the QCL indication information.
- the terminal device also determines the mapping relationship between different time units or frequency domain units and QCL information according to the DMRS port indication information.
- the network device further determines a transmission mechanism, sends the DMRS port indication information based on the determined transmission mechanism, and then sends it according to the transmission mechanism and the DMRS port indicated by the DMRS port indication information DMRS and related data; correspondingly, the terminal device determines the transmission mechanism and the DMRS port according to the DMRS port indication information, and then receives the DMRS and related data according to the transmission mechanism and the DMRS port.
- the PDSCH on the different time units or frequency domain units corresponds to a redundancy version or codeword of the same TB.
- the network device in step 801, the network device also determines the indication information of the RV version, and the indication information of the RV version is used to indicate the starting value of an RV version, and then in step 802, the network device The terminal device sends the indication information of the RV version, and in step 803, the terminal device determines the RV version used for receiving data according to the indication information of the RV version.
- the transmission scheme uses only scheme 2 of the transmission scheme in point (3) in the introduction of the above concepts and basic knowledge
- QCL information corresponds to frequency domain resources
- the relationship is shown in Figure 10.
- transmissions in the same time period that is, in the same time unit
- transmissions in different time periods correspond to different QCL information
- transmissions on the same frequency band only correspond to one QCL information
- transmissions on different frequency bands correspond to different QCL information.
- the PDSCHs on the different time units or frequency domain units correspond to different redundancy versions or codewords of the same TB.
- the network device further determines the indication information of the RV version, which is used to indicate the starting values of the two RVs, and then in step 802, the network device The terminal device sends the indication information of the RV version, and in step 803, the terminal device determines the RV version used for receiving data according to the indication information of the RV version.
- the transmission scheme adopts the combination of scheme 1 and scheme 2 of the transmission scheme in point (3) in the introduction of the above concepts and basic knowledge
- the corresponding relationship between QCL information and time domain resources is shown in Figure 11, or QCL information
- the corresponding relationship with frequency domain resources is shown in Figure 12.
- the transmission in each time period (time unit) corresponds to different QCL information
- the QCL information corresponding to the repetition in different time periods (time unit) is the same (for example, both are 2).
- the transmission on each frequency band (frequency domain unit) corresponds to different QCL information
- the repetitions on different frequency bands (frequency domain unit) correspond to the same QCL information (for example, both are 2).
- Time domain units or frequency domain units corresponding to the same QCL information correspond to the same RV version
- time domain units or frequency domain units corresponding to different QCL information correspond to different RV versions, that is, different time domain units or frequency domain units correspond to different The starting value of the RV version.
- step 801 the network device further determines code word indication information, and then in step 802, the network device sends the code word indication information to the terminal device, In step 803, the terminal device determines the MCS and data transmission mechanism used to receive data according to the codeword indication information.
- the network device sends DCI, and the DCI is used to schedule the transmission of a TB, including the time-frequency resources occupied by the TB transmission, transmission mode, and so on.
- the DCI includes two codeword indication information, and each codeword indication information is used to indicate the MCS, RV version, and new data transmission indication information (new data indicator, NDI) of the scheduled TB.
- new data indicator new data indicator
- the two codeword indication information only indicate that one codeword is activated, it indicates that the PDSCH on the different time unit or frequency domain unit corresponds to a redundancy version or codeword of the same TB, that is, different time units or
- the data on the frequency domain unit is continuously coded starting from a starting position corresponding to an RV version.
- the DCI only indicates the activation of the first codeword
- the first MCS indication field and the first RV indication field are used to indicate activation of a codeword and indicate the MCS and RV version of the codeword
- the second MCS The indication field and the second RV indication field are used to indicate the deactivation of the second codeword, for example, indicating that the MCS index value 26 and the RV index value 1 indicate that the second codeword is deactivated.
- the data on different time units or frequency domain units are all received in the coding manner indicated by the first MCS indicator field and the first RV indicator field.
- the two codeword indication information indicates that two codewords are activated, it indicates that the PDSCHs on the different time units or frequency domain units correspond to different redundancy versions or codewords of the same TB, that is, different time units Or the data on the frequency domain unit starts to be coded continuously at the start positions corresponding to different RV versions.
- the DCI indicates to activate two codewords
- the first MCS indicator field and the first RV indicator field are used to indicate an MCS and RV of the TB
- the second MCS indicator field and the second RV indicator field Another MCS and RV used to indicate the TB
- the first MCS indication field corresponds to a part of the frequency domain unit (marked as the first frequency domain unit)
- the second MCS indication field corresponds to the frequency domain unit except the part of the frequency domain unit.
- the remaining frequency domain units outside marked as the second frequency domain unit).
- the first frequency domain unit corresponds to the modulation and coding scheme corresponding to the first MCS indication field and the first RV indication field
- the second frequency domain unit corresponds to the modulation and coding scheme corresponding to the second MCS indication field and the second RV indication field.
- the maximum number of preamble DMRS symbols is configured as 1.
- the transmission on the corresponding PDSCH is single-user multiple Input multiple output (SU-MIMO) transmission.
- the first DMRS port set includes a DMRS port set ⁇ 0, 2 ⁇
- the second DMRS port set includes a DMRS port set ⁇ 0 ⁇ , or further includes a DMRS port set ⁇ 0, 1 ⁇ .
- the transmission on the corresponding PDSCH is multi-user multiple input multiple output (MU-MIMO) transmission.
- the second DMRS port set includes DMRS port sets ⁇ 0 ⁇ and ⁇ 1 ⁇ , or also includes DMRS port sets ⁇ 0, 1 ⁇ .
- the multiple DMRS port sets may exist in the form of a table, and the multiple DMRS port sets may include at least: ⁇ 0, 2 ⁇ , ⁇ 0 ⁇ .
- the table may also include a field indicating the number of repetitions in the time domain (or frequency domain), for example, indicating 2 times, and may also include a field indicating QCL information, for example, indicating two QCL information.
- the DMRS port indication information indicates ⁇ 0 ⁇
- the table can reuse the table (4-6 bits) in the prior art, or it can be a newly added table in this application.
- the table in which the multiple DMRS port sets exist may be a 1-bit indication, for example, it may be as shown in Table 8:
- the table in which the multiple DMRS port sets exist may be a 2-bit indication, for example, it may be as shown in Table 9:
- the data transmission mode is similar to that of ⁇ 0 ⁇ .
- the transmission mode of FIG. 9 or FIG. 10 may also be adopted.
- the multiple DMRS sets may also include ⁇ 0-2 ⁇ , ⁇ 0-3 ⁇ , etc., that is to say, the table in which the DMRS port set exists may also include ⁇ 0-2 ⁇ , ⁇ 0-3 ⁇ , etc.
- the transmission mechanism indicated by the above DMRS port set is the same as the transmission mechanism indicated by ⁇ 0, 2 ⁇ , that is, it follows the proposal in this application.
- different time domain units or frequency domains The DMRS and corresponding data received on the unit use the same QCL information.
- DMRS ports 0 and 1 can be predefined to correspond to QCL1, and DMRS port 2 to correspond to QCL2.
- the transmission mechanism indicated by the above DMRS port set is the same as the transmission mechanism indicated by ⁇ 0 ⁇ or ⁇ 1 ⁇ or ⁇ 0,1 ⁇ , that is, when the DMRS port set includes more than two DMRS ports
- DMRS and corresponding data received on different time domain units or frequency domain units use different QCL information
- DMRSs belonging to different CDM groups on the same time domain unit or frequency domain unit are received using the same QCL information.
- DMRSs belonging to different CDM groups on the same time domain unit or frequency domain unit are received using the same QCL information.
- the 3 DMRS ports all correspond to QCL 1
- DMRS port indication method provided in the embodiments of this application can indicate different high-reliability transmission mechanisms without increasing the indication overhead, thereby ensuring that the terminal device can correctly receive data according to different transmission mechanisms, and supports dynamic The transmission mechanism is changed to improve the spectrum efficiency.
- an embodiment of the present application provides a communication device, which is applied to the communication system shown in FIG. 1.
- the communication device may be used to implement the DMRS port indication method shown in FIGS. 6-8.
- the communication device may include a processing unit 1301 and a transceiver unit 1302.
- the communication device may be a network device, which is used to implement the function of the network device in the implementation shown in FIG. 6, and may specifically be:
- the processing unit 1301 is configured to determine DMRS port indication information, where the DMRS port indication information is used to indicate a DMRS port set; wherein, the DMRS port set is one of multiple DMRS port sets, and the multiple DMRS ports DMRS ports included in at least one DMRS port set in the set belong to multiple CDM groups, and the number of codewords corresponding to each DMRS port set in the multiple DMRS port sets is 1;
- Part or all of the DMRS port sets in the plurality of DMRS port sets are the first DMRS port set, and each of the first DMRS port sets includes at least the DMRS port with the largest port number in the first CDM group and the second CDM group The DMRS port with the largest port number;
- the transceiver unit 1302 is configured to send the DMRS port indication information.
- the DMRS ports belonging to the first CDM group and the ports of the first RS are QCL
- the DMRS ports belonging to the second CDM group and the ports of the second RS are QCL
- the first RS and the second RS are different.
- the first DMRS port set includes at least three of the following:
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1, and the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 2, and the two DMRS ports belonging to the first CDM group are the two DMRS ports with the largest port numbers in the first CDM group Port, the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the first CDM group in the first port set is equal to 2, and the two DMRS ports belonging to the first CDM group are the two DMRS ports with the largest port numbers in the first CDM group ,
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 2, and the 2 DMRS ports belonging to the second CDM group are the largest port numbers in the second CDM group 2 DMRS ports;
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 2, and the two DMRS ports belonging to the second CDM group are the two DMRS ports with the largest port numbers in the second CDM group Port, the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1.
- the first DMRS port set further includes at least one of the following:
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 3, and the 3 DMRS ports belonging to the first CDM group are the 3 DMRS ports with the largest port numbers in the first CDM group Port, the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 3, and the 3 DMRS ports belonging to the second CDM group are the 3 DMRS ports with the largest port numbers in the second CDM group Port, the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1.
- the transmission on the corresponding PDSCH is multi-user multiple input multiple output (MU- MIMO) transmission.
- MU- MIMO multi-user multiple input multiple output
- the transmission on the corresponding PDSCH Is single-user multiple-input multiple-output (SU-MIMO) transmission; when the DMRS port set indicated by the DMRS port indication information is the first DMRS port set and the number of corresponding pre-DMRS symbols is 2, then The transmission on the corresponding PDSCH is multi-user multiple input multiple output (MU-MIMO) transmission.
- SU-MIMO single-user multiple-input multiple-output
- the communication device may be a terminal device, which is used to implement the function of the terminal device in the implementation shown in FIG. 6, which may specifically be:
- the transceiver unit 1302 is configured to receive DMRS port indication information, where the DMRS port indication information is used to indicate a DMRS port set; wherein, the DMRS port set is one of a plurality of DMRS port sets, and the plurality of DMRS ports DMRS ports included in at least one DMRS port set in the set belong to multiple CDM groups; the number of codewords corresponding to each port set in the multiple DMRS port sets is 1;
- Part or all of the DMRS port sets of the plurality of DMRS port sets are the first DMRS port set, and each of the first DMRS port sets includes at least the DMRS port with the largest port number in the first CDM group and the second CDM group DMRS port with the largest port number;
- the processing unit 1301 is configured to determine a DMRS port according to the DMRS port indication information.
- the DMRS ports belonging to the first CDM group and the ports of the first RS are QCL
- the DMRS ports belonging to the second CDM group and the ports of the second RS are QCL
- the first RS and the second RS are different.
- the first DMRS port set includes at least three of the following:
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1, and the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 2, and the two DMRS ports belonging to the first CDM group are the two DMRS ports with the largest port numbers in the first CDM group Port, the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the first CDM group in the first port set is equal to 2, and the two DMRS ports belonging to the first CDM group are the two DMRS ports with the largest port numbers in the first CDM group ,
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 2, and the 2 DMRS ports belonging to the second CDM group are the largest port numbers in the second CDM group 2 DMRS ports;
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 2, and the two DMRS ports belonging to the second CDM group are the two DMRS ports with the largest port numbers in the second CDM group Port, the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1.
- the first DMRS port set further includes at least one of the following:
- the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 3, and the 3 DMRS ports belonging to the first CDM group are the 3 DMRS ports with the largest port numbers in the first CDM group Port, the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 1;
- the number of DMRS ports belonging to the second CDM group in the first DMRS port set is equal to 3, and the 3 DMRS ports belonging to the second CDM group are the 3 DMRS ports with the largest port numbers in the second CDM group Port, the number of DMRS ports belonging to the first CDM group in the first DMRS port set is equal to 1.
- the transmission on the corresponding PDSCH is multi-user multiple input multiple output (MU- MIMO) transmission.
- MU- MIMO multi-user multiple input multiple output
- the transmission on the corresponding PDSCH Is single-user multiple-input multiple-output (SU-MIMO) transmission; when the DMRS port set indicated by the DMRS port indication information is the first DMRS port set and the number of corresponding pre-DMRS symbols is 2, then The transmission on the corresponding PDSCH is multi-user multiple input multiple output (MU-MIMO) transmission.
- SU-MIMO single-user multiple-input multiple-output
- the communication device may be a network device, which is used to implement the function of the network device in the implementation shown in FIG. 8, and may specifically be:
- the processing unit 1301 is configured to determine DMRS port indication information, where the DMRS port indication information is used to indicate a DMRS port set; wherein, the DMRS port set is one of multiple DMRS port sets, and the multiple DMRS ports Part of the DMRS port set in the set is the first DMRS port set, the DMRS ports included in the first DMRS port set belong to multiple CDM groups, and some of the DMRS port sets in the multiple DMRS port sets are the second DMRS port set DMRS ports included in the second DMRS port set belong to the same CDM group;
- the first DMRS port set is used to indicate that the QCL information used for transmitting corresponding PDSCHs on different time units or frequency domain units is the same, and the second DMRS port set is used to indicate transmission on different time units or frequency domain units.
- the QCL information used by the corresponding PDSCH is different;
- the transceiver unit 1302 is configured to send the DMRS port indication information.
- the PDSCH on the different time units or frequency domain units corresponds to a redundancy version or codeword of the same TB.
- the PDSCHs on the different time units or frequency domain units correspond to different redundancy versions or different codewords of the same TB.
- the transmission on the corresponding PDSCH is single-user multiple input multiple output (SU-MIMO) transmission.
- SU-MIMO single-user multiple input multiple output
- the communication device may be a terminal device, which is used to implement the function of the terminal device in the implementation shown in FIG. 8, and may specifically be:
- the transceiver unit 1302 is configured to receive DMRS port indication information, where the DMRS port indication information is used to indicate a DMRS port set; wherein, the DMRS port set is one of a plurality of DMRS port sets, and the plurality of DMRS ports Part of the DMRS port set in the set is the first DMRS port set, the DMRS ports included in the first DMRS port set belong to multiple CDM groups, and some of the DMRS port sets in the multiple DMRS port sets are the second DMRS port set DMRS ports included in the second DMRS port set belong to the same CDM group;
- the first DMRS port set is used to indicate that the QCL information used to transmit the corresponding PDSCH on different time units or frequency domain units is different, and the second DMRS port set is used to indicate transmission on different time units or frequency domain units.
- the QCL information used by the corresponding PDSCH is the same;
- the processing unit 1301 is configured to determine a DMRS port according to the DMRS port indication information.
- the PDSCHs on the different time units or frequency domain units correspond to a redundancy version of the same TB.
- the PDSCHs on the different time units or frequency domain units correspond to different redundancy versions of the same TB.
- the transmission on the corresponding PDSCH is single-user multiple input multiple output (SU-MIMO) transmission.
- SU-MIMO single-user multiple input multiple output
- the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
- the functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
- the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
- the technical solution of this application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including a number of instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .
- an embodiment of the present application also provides a communication device, which is used to implement the DMRS port indication method shown in FIG. 6 to FIG. 8.
- the communication device 1400 may include: a transceiver 1401 and a processor 1402, where:
- the processor 1402 may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP.
- the processor 1402 may further include a hardware chip.
- the aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
- ASIC application-specific integrated circuit
- PLD programmable logic device
- the above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.
- CPLD complex programmable logic device
- FPGA field-programmable gate array
- GAL generic array logic
- the transceiver 1401 and the processor 1402 are connected to each other.
- the transceiver 1401 and the processor 1402 are connected to each other through a bus 1404;
- the bus 704 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard structure (Extended Industry Standard). Architecture, EISA) bus, etc.
- PCI Peripheral Component Interconnect
- EISA Extended Industry Standard
- the bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in FIG. 14, but it does not mean that there is only one bus or one type of bus.
- the communication device may further include a memory 1403, and the memory 1403 is used for storing programs and the like.
- the program may include program code, and the program code includes computer operation instructions.
- the memory 1403 may include RAM, or may also include non-volatile memory, for example, at least one disk memory.
- the processor 1402 executes the application program stored in the memory 1403 to realize the above-mentioned functions, thereby realizing the DMRS port indication method shown in any of FIGS. 6-8.
- the communication device may be a network device, which is used to implement the functions of the network device involved in the foregoing FIGS. 6-8.
- the communication device may be a network device, which is used to implement the functions of the network device involved in the foregoing FIGS. 6-8.
- FIGS. 6-8 For details, refer to the foregoing method embodiment, which is not described in detail here.
- the communication device may be a terminal device, which is used to implement the functions of the terminal device involved in FIGS. 6-8.
- the communication device may be a terminal device, which is used to implement the functions of the terminal device involved in FIGS. 6-8.
- the communication device may be a terminal device, which is used to implement the functions of the terminal device involved in FIGS. 6-8.
- the embodiments of the present application also provide a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, the method described in any of the above method embodiments is implemented.
- the embodiments of the present application also provide a computer program product, which, when executed by a computer, implements the method described in any of the foregoing method embodiments.
- An embodiment of the present application also provides a chip, which is coupled with a memory to implement the method described in any of the foregoing method embodiments.
- the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
- a computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
- These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
- the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
- These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
- the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.
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Abstract
Description
Claims (27)
- 一种解调参考信号DMRS端口指示方法,其特征在于,包括:网络设备确定DMRS端口指示信息,所述DMRS端口指示信息用于指示DMRS端口集合;其中,所述DMRS端口集合为多个DMRS端口集合中的一个,所述多个DMRS端口集合中的至少一个DMRS端口集合包括的DMRS端口属于多个CDM组,所述多个DMRS端口集合中每个DMRS端口集合对应的码字的数量为1;所述多个DMRS端口集合中的部分或全部DMRS端口集合为第一DMRS端口集合,每个所述第一DMRS端口集合中至少包括第一CDM组中端口号最大的DMRS端口和第二CDM组中端口号最大的DMRS端口;所述网络设备发送所述DMRS端口指示信息。
- 一种解调参考信号DMRS端口指示方法,其特征在于,包括:终端设备接收DMRS端口指示信息,所述DMRS端口指示信息用于指示DMRS端口集合;其中,所述DMRS端口集合为多个DMRS端口集合中的一个,所述多个DMRS端口集合中的至少一个DMRS端口集合包括的DMRS端口属于多个CDM组;所述多个DMRS端口集合中每个端口集合对应的码字的数量为1;所述多个DMRS端口集合的部分或全部DMRS端口集合为第一DMRS端口集合,每个所述第一DMRS端口集合中至少包括第一CDM组中端口号最大的DMRS端口和第二CDM组中端口号最大的DMRS端口;所述终端设备根据所述DMRS端口指示信息确定DMRS端口。
- 如权利要求1或2所述的方法,其特征在于,属于所述第一CDM组的DMRS端口与第一RS的端口是QCL的,属于所述第二CDM组的DMRS端口与第二RS的端口是QCL的,第一RS和第二RS不同。
- 如权利要求1-3任一项所述的方法,其特征在于,所述第一DMRS端口集合包括以下至少三个:所述第一DMRS端口集合中属于所述第一CDM组的DMRS端口的数量等于1,所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于1;所述第一DMRS端口集合中属于所述第一CDM组的DMRS端口的数量等于2,属于所述第一CDM组的2个DMRS端口为所述第一CDM组中端口号最大的2个DMRS端口,所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于1;所述第一端口集合中属于所述第一CDM组的DMRS端口的数量等于2,属于所述第一CDM组的2个DMRS端口为所述第一CDM组中端口号最大的2个DMRS端口,所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于2,所述属于所述第二CDM组的2个DMRS端口为所述第二CDM组中端口号最大的2个DMRS端口;所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于2,属于所述第二CDM组的2个DMRS端口为所述第二CDM组中端口号最大的2个DMRS端口,所述第一DMRS端口集合中属于所述第一CDM组的DMRS端口的数量等于1。
- 如权利要求4所述的方法,其特征在于,所述第一DMRS端口集合还包括以下至少一个:所述第一DMRS端口集合中属于所述第一CDM组的DMRS端口的数量等于3,属于 所述第一CDM组的3个DMRS端口为所述第一CDM组中端口号最大的3个DMRS端口,所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于1;所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于3,属于所述第二CDM组的3个DMRS端口为所述第二CDM组中端口号最大的3个DMRS端口,所述第一DMRS端口集合中属于所述第一CDM组的DMRS端口的数量等于1。
- 如权利要求1-5任一项所述的方法,其特征在于,当所述DMRS端口指示信息指示的所述DMRS端口集合为所述第一DMRS端口集合时,则在相应PDSCH上的传输为多用户多输入多输出(MU-MIMO)传输。
- 如权利要求1-5任一项所述的方法,其特征在于,当所述DMRS端口指示信息指示的所述DMRS端口集合为所述第一DMRS端口集合且相应的前置DMRS符号数量为1时,则在相应PDSCH上的传输为单用户多输入多输出(SU-MIMO)传输;当所述DMRS端口指示信息指示的所述DMRS端口集合为所述第一DMRS端口集合且相应的前置DMRS符号数量为2时,则在相应的PDSCH上的传输为多用户多输入多输出(MU-MIMO)传输。
- 一种解调参考信号DMRS端口指示方法,其特征在于,包括:网络设备确定DMRS端口指示信息,所述DMRS端口指示信息用于指示DMRS端口集合;其中,所述DMRS端口集合为多个DMRS端口集合中的一个,所述多个DMRS端口集合中的部分DMRS端口集合为第一DMRS端口集合,所述第一DMRS端口集合包括的DMRS端口属于多个CDM组,所述多个DMRS端口集合中的部分DMRS端口集合为第二DMRS端口集合,所述第二DMRS端口集合包括的DMRS端口属于同一个CDM组;所述第一DMRS端口集合用于指示在不同的时间单元或者频域单元上传输相应PDSCH采用的QCL信息相同,所述第二DMRS端口集合用于指示在不同的时间单元或者频域单元上传输相应PDSCH采用的QCL信息不相同;所述网络设备发送所述DMRS端口指示信息。
- 一种解调参考信号DMRS端口指示方法,其特征在于,包括:终端设备接收DMRS端口指示信息,所述DMRS端口指示信息用于指示DMRS端口集合;其中,所述DMRS端口集合为多个DMRS端口集合中的一个,所述多个DMRS端口集合中的部分DMRS端口集合为第一DMRS端口集合,所述第一DMRS端口集合包括的DMRS端口属于多个CDM组,所述多个DMRS端口集合中的部分DMRS端口集合为第二DMRS端口集合,所述第二DMRS端口集合包括的DMRS端口属于同一个CDM组;所述第一DMRS端口集合用于指示在不同的时间单元或者频域单元上传输相应PDSCH采用的QCL信息不同,所述第二DMRS端口集合用于指示在不同的时间单元或者频域单元上传输相应PDSCH采用的QCL信息相同;所述终端设备根据所述DMRS端口指示信息确定DMRS端口。
- 如权利要求8或9所述的方法,其特征在于,所述不同的时间单元或者频域单元上的PDSCH对应同一个TB的一个冗余版本。
- 如权利要求8或9所述的方法,其特征在于,所述不同的时间单元或者频域单元上的PDSCH对应同一个TB的不同冗余版本。
- 如权利要求8-11任一项所述的方法,其特征在于,当所述DMRS端口指示信息指示的所述DMRS端口集合为所述第一DMRS端口集合或者所述第二DMRS端口集合时, 则在相应PDSCH上的传输为单用户多输入多输出(SU-MIMO)的传输。
- 一种通信装置,其特征在于,包括:处理器,用于确定DMRS端口指示信息,所述DMRS端口指示信息用于指示DMRS端口集合;其中,所述DMRS端口集合为多个DMRS端口集合中的一个,所述多个DMRS端口集合中的至少一个DMRS端口集合包括的DMRS端口属于多个CDM组,所述多个DMRS端口集合中每个DMRS端口集合对应的码字的数量为1;所述多个DMRS端口集合中的部分或全部DMRS端口集合为第一DMRS端口集合,每个所述第一DMRS端口集合中至少包括第一CDM组中端口号最大的DMRS端口和第二CDM组中端口号最大的DMRS端口;收发器,用于发送所述DMRS端口指示信息。
- 一种通信装置,其特征在于,包括:收发器,用于接收DMRS端口指示信息,所述DMRS端口指示信息用于指示DMRS端口集合;其中,所述DMRS端口集合为多个DMRS端口集合中的一个,所述多个DMRS端口集合中的至少一个DMRS端口集合包括的DMRS端口属于多个CDM组;所述多个DMRS端口集合中每个端口集合对应的码字的数量为1;所述多个DMRS端口集合的部分或全部DMRS端口集合为第一DMRS端口集合,每个所述第一DMRS端口集合中至少包括第一CDM组中端口号最大的DMRS端口和第二CDM组中端口号最大的DMRS端口;处理器,用于根据所述DMRS端口指示信息确定DMRS端口。
- 如权利要求13或14所述的装置,其特征在于,属于所述第一CDM组的DMRS端口与第一RS的端口是QCL的,属于所述第二CDM组的DMRS端口与第二RS的端口是QCL的,第一RS和第二RS不同。
- 如权利要求13-15任一项所述的装置,其特征在于,所述第一DMRS端口集合包括以下至少三个:所述第一DMRS端口集合中属于所述第一CDM组的DMRS端口的数量等于1,所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于1;所述第一DMRS端口集合中属于所述第一CDM组的DMRS端口的数量等于2,属于所述第一CDM组的2个DMRS端口为所述第一CDM组中端口号最大的2个DMRS端口,所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于1;所述第一端口集合中属于所述第一CDM组的DMRS端口的数量等于2,属于所述第一CDM组的2个DMRS端口为所述第一CDM组中端口号最大的2个DMRS端口,所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于2,所述属于所述第二CDM组的2个DMRS端口为所述第二CDM组中端口号最大的2个DMRS端口;所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于2,属于所述第二CDM组的2个DMRS端口为所述第二CDM组中端口号最大的2个DMRS端口,所述第一DMRS端口集合中属于所述第一CDM组的DMRS端口的数量等于1。
- 如权利要求16所述的装置,其特征在于,所述第一DMRS端口集合还包括以下至少一个:所述第一DMRS端口集合中属于所述第一CDM组的DMRS端口的数量等于3,属于所述第一CDM组的3个DMRS端口为所述第一CDM组中端口号最大的3个DMRS端口, 所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于1;所述第一DMRS端口集合中属于所述第二CDM组的DMRS端口的数量等于3,属于所述第二CDM组的3个DMRS端口为所述第二CDM组中端口号最大的3个DMRS端口,所述第一DMRS端口集合中属于所述第一CDM组的DMRS端口的数量等于1。
- 如权利要求13-17任一项所述的装置,其特征在于,当所述DMRS端口指示信息指示的所述DMRS端口集合为所述第一DMRS端口集合时,则在相应PDSCH上的传输为多用户多输入多输出(MU-MIMO)传输。
- 如权利要求13-17任一项所述的装置,其特征在于,当所述DMRS端口指示信息指示的所述DMRS端口集合为所述第一DMRS端口集合且相应的前置DMRS符号数量为1时,则在相应PDSCH上的传输为单用户多输入多输出(SU-MIMO)传输;当所述DMRS端口指示信息指示的所述DMRS端口集合为所述第一DMRS端口集合且相应的前置DMRS符号数量为2时,则在相应的PDSCH上的传输为多用户多输入多输出(MU-MIMO)传输。
- 一种通信装置,其特征在于,包括:处理器,用于确定DMRS端口指示信息,所述DMRS端口指示信息用于指示DMRS端口集合;其中,所述DMRS端口集合为多个DMRS端口集合中的一个,所述多个DMRS端口集合中的部分DMRS端口集合为第一DMRS端口集合,所述第一DMRS端口集合包括的DMRS端口属于多个CDM组,所述多个DMRS端口集合中的部分DMRS端口集合为第二DMRS端口集合,所述第二DMRS端口集合包括的DMRS端口属于同一个CDM组;所述第一DMRS端口集合用于指示在不同的时间单元或者频域单元上传输相应PDSCH采用的QCL信息相同,所述第二DMRS端口集合用于指示在不同的时间单元或者频域单元上传输相应PDSCH采用的QCL信息不相同;收发器,用于发送所述DMRS端口指示信息。
- 一种通信装置,其特征在于,包括:收发器,用于接收DMRS端口指示信息,所述DMRS端口指示信息用于指示DMRS端口集合;其中,所述DMRS端口集合为多个DMRS端口集合中的一个,所述多个DMRS端口集合中的部分DMRS端口集合为第一DMRS端口集合,所述第一DMRS端口集合包括的DMRS端口属于多个CDM组,所述多个DMRS端口集合中的部分DMRS端口集合为第二DMRS端口集合,所述第二DMRS端口集合包括的DMRS端口属于同一个CDM组;所述第一DMRS端口集合用于指示在不同的时间单元或者频域单元上传输相应PDSCH采用的QCL信息不同,所述第二DMRS端口集合用于指示在不同的时间单元或者频域单元上传输相应PDSCH采用的QCL信息相同;处理器,用于根据所述DMRS端口指示信息确定DMRS端口。
- 如权利要求20或21所述的装置,其特征在于,所述不同的时间单元或者频域单元上的PDSCH对应同一个TB的一个冗余版本。
- 如权利要求20或21所述的装置,其特征在于,所述不同的时间单元或者频域单元上的PDSCH对应同一个TB的不同冗余版本。
- 如权利要求20-23任一项所述的装置,其特征在于,当所述DMRS端口指示信息 指示的所述DMRS端口集合为所述第一DMRS端口集合或者所述第二DMRS端口集合时,则在相应PDSCH上的传输为单用户多输入多输出(SU-MIMO)的传输。
- 一种计算机存储介质,其特征在于,所述计算机存储介质中存储有计算机可执行指令,所述计算机可执行指令在被所述计算机调用时用于使所述计算机执行上述权利要求1-12中任一项所述的方法。
- 一种包含指令的计算机程序产品,其特征在于,当其在计算机上运行时,使得计算机执行上述权利要求1-12中任一项所述的方法。
- 一种芯片,其特征在于,所述芯片与存储器耦合,用于读取并执行所述存储器中存储的程序指令,以实现如权利要求1-12任一项所述的方法。
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| WO2023287147A1 (ko) * | 2021-07-16 | 2023-01-19 | 엘지전자 주식회사 | 무선 통신 시스템에서 복조 참조 신호 송수신 방법 및 장치 |
| JP2025523842A (ja) * | 2022-08-05 | 2025-07-25 | 富士通株式会社 | 上りリンクデータ送信、上りリンクデータ受信装置及び方法 |
| JP7798229B2 (ja) | 2022-08-05 | 2026-01-14 | 1Finity株式会社 | 上りリンクデータ送信、上りリンクデータ受信装置及び方法 |
| WO2026036940A1 (zh) * | 2024-08-15 | 2026-02-19 | 华为技术有限公司 | 解调参考信号发送或接收方法及装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20230318776A1 (en) | 2023-10-05 |
| US11711188B2 (en) | 2023-07-25 |
| EP4007200A1 (en) | 2022-06-01 |
| US12068992B2 (en) | 2024-08-20 |
| CN114826527A (zh) | 2022-07-29 |
| CN112311513B (zh) | 2022-04-05 |
| MX2022001177A (es) | 2022-04-18 |
| US20220158792A1 (en) | 2022-05-19 |
| CN112311513A (zh) | 2021-02-02 |
| EP4007200A4 (en) | 2022-10-05 |
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