WO2017152730A1 - 一种参考信号映射方法及装置 - Google Patents
一种参考信号映射方法及装置 Download PDFInfo
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- WO2017152730A1 WO2017152730A1 PCT/CN2017/073077 CN2017073077W WO2017152730A1 WO 2017152730 A1 WO2017152730 A1 WO 2017152730A1 CN 2017073077 W CN2017073077 W CN 2017073077W WO 2017152730 A1 WO2017152730 A1 WO 2017152730A1
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- 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
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
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- 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
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B7/046—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
- H04B7/0473—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account taking constraints in layer or codeword to antenna mapping into account
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- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0658—Feedback reduction
- H04B7/066—Combined feedback for a number of channels, e.g. over several subcarriers like in orthogonal frequency division multiplexing [OFDM]
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- H—ELECTRICITY
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- H04J13/00—Code division multiplex systems
- H04J13/0003—Code application, i.e. aspects relating to how codes are applied to form multiplexed channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/004—Orthogonal
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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
- H04L5/0001—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), DMT
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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
- H04L5/0058—Allocation criteria
- H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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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
- 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
Definitions
- the present disclosure relates to the field of wireless communication technologies, and in particular, to a reference signal mapping method and apparatus.
- C-RS Cell-specific Reference Signal
- UE-RS user-specific reference.
- DM-RS Demodulation-Reference Signal
- CSI-RS Channel State Indication Reference Signal
- CSI-RS is used for downlink channel measurement and estimation.
- the CSI-RS can be configured as a 2-port, 4-port or 8-port, and there are 20 2-port CSI-RSs in one PRB (as shown in Figure 1a, one 2-port CSI-RS is mapped to a set of identifiers as 0). ⁇ 1 RE on), or 10 groups of 4-port CSI-RS (as shown in Figure 1b, one 4-port CSI-RS is mapped to a set of REs with IDs 0-3), or five 8-port CSIs -RS (As shown in Figure 1c, one 8-port CSI-RS is mapped to a set of REs identified as 0-7).
- the LTE system cannot support more CSI-RSs of antenna ports, such as CSI-RS transmissions of more than 16 ports.
- N an integer greater than 16 wherein an N-port reference signal pattern in which an N-port CSI-RS is mapped to the RE
- the location is determined according to the RE location to which the multiple sets of M-port CSI-RSs in the M-port reference signal pattern are mapped, and M is equal to 4 or 8;
- Resource mapping is performed on the CSI-RS according to the determined RE.
- an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and the L-port 8 port in the 8-port reference signal pattern
- the CSI-RS is mapped with the same RE position; where, when N is equal to 18, 24, L is equal to 3, when N is equal to 20, 28, or 32, L is equal to 4, and:
- Each group of 8-port CSI-RSs in the N port is divided into two packet CSI-RSs, each of which is multiplexed with 4 codewords of 4-bit orthogonal spreading codes, wherein one packet CSI-RS is mapped to 4 ports corresponding to RE; where N is equal to 24 or 32.
- the location of the RE to which the N-port CSI-RS in the N-port reference signal pattern is mapped is the same as the location of the L ⁇ P REs to which the L-group 8-port CSI-RS in the 8-port reference signal pattern is mapped;
- P is equal to 6 or 8 when N is equal to 18, P is equal to 5 or 8 when N is equal to 20, P is equal to 7 or 8 when N is equal to 28, P is equal to 8 when N is equal to 24, and P is equal to 32 when N is equal to Equal to 8.
- the 4-port reference signal pattern includes 10 groups of 4-port CSI-RSs, and each of the 4 groups of port CSI-RSs is time-division multiplexed. Mapping to 4 REs on the first to fourth OFDM symbols, and each of the 6 groups of 4-port CSI-RSs is mapped to the fifth to sixth in a time division multiplexing combined with frequency division multiplexing.
- DMRS DeModulation Reference Signal
- Each group of 8-port CSI-RSs is mapped to 4 REs on the first to fourth OFDM symbols and 4 REs on the fifth to sixth OFDM symbols in a time division multiplexing and frequency division multiplexing manner; wherein, the first The fourth OFDM symbol is the symbol in which the DMRS is located.
- the first to fourth OFDM symbols are the sixth to seventh OFDM symbols in the first slot of one subframe and the subframe, respectively, in a normal cyclic subframe including 14 OFDM symbols.
- the sixth to seventh OFDM symbols in the second slot, the fifth to sixth OFDM symbols being the third to fourth OFDM symbols in the second slot of the subframe, respectively; or,
- the first to fourth OFDM symbols are respectively the third to fourth OFDM symbols in the first slot of one subframe and the first OFDM symbol of the subframe The third to fourth OFDM symbols of the two slots, the fifth to sixth OFDM symbols being the sixth to seventh OFDM symbols in the first slot of the subframe, respectively.
- each group of M port CSI-RSs in the M port reference signal pattern is mapped to one sub-band in a time division multiplexing manner and a frequency division multiplexing manner.
- the fifth to sixth OFDM symbols in the first slot of the frame and the fifth to sixth OFDM symbols in the second slot of the subframe are mapped to one sub-band in a time division multiplexing manner and a frequency division multiplexing manner.
- a determining module configured to determine, according to the N-port reference signal pattern, an RE to which the channel state information reference signal CSI-RS is mapped, where N is an integer greater than 16, wherein an N-port CSI-RS in the N-port reference signal pattern
- the RE position to be mapped is determined according to the RE position to which the plurality of sets of M port CSI-RSs in the M port reference signal pattern are mapped, and M is equal to 4 or 8;
- N is equal to 18, 20, 24, 28 or 32; wherein M is equal to 4 or 8 when N is equal to 24 or 32, and M is equal to 8 when N is equal to 18, 20, 28.
- N is equal to 24 or 32
- an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position
- the Q-group 4-port CSI-RS in the 4-port reference signal pattern is mapped to The RE positions are the same
- each group of 4-port CSI-RS is multiplexed with 4 code words of 4 bits of orthogonal spreading code.
- Each S port in the N port is multiplexed with S code words of 8 code words of an 8-bit orthogonal spreading code, and mapped to an RE position occupied by an 8-port CSI-RS; wherein, when N is equal to S is equal to 6 or 8 at 18 o'clock, S is equal to 5 or 8 when N is equal to 20, S is equal to 7 or 8 when N is equal to 28, S is equal to 8 when N is equal to 24, and S is equal to 8 when N is equal to 32;
- Each group of 8-port CSI-RSs in the N port is divided into two packet CSI-RSs, each of which is multiplexed with 4 codewords of 4-bit orthogonal spreading codes, wherein one packet CSI-RS is mapped to 4 ports corresponding to RE; where N is equal to 24 or 32.
- the location of the RE to which the N-port CSI-RS in the N-port reference signal pattern is mapped is the same as the location of the P-relays to which the L-group 8-port CSI-RS is mapped in the 8-port reference signal pattern; P is equal to 6 or 8 when N is equal to 18, P is equal to 5 or 8 when N is equal to 20, P is equal to 7 or 8 when N is equal to 28, P is equal to 8 when N is equal to 24, and P is equal to 8 when N is equal to 32. .
- the 8-port reference signal pattern includes five groups of 8-port CSI- RS, where:
- Each group of 8-port CSI-RSs is mapped to 4 REs on the first to fourth OFDM symbols and 4 REs on the fifth to sixth OFDM symbols in a time division multiplexing and frequency division multiplexing manner; wherein, the first The fourth OFDM symbol is the symbol in which the DMRS is located.
- the first to fourth OFDM symbols are the sixth to seventh OFDM symbols in the first slot of one subframe and the subframe, respectively, in a normal cyclic subframe including 14 OFDM symbols.
- the sixth to seventh OFDM symbols in the second slot, the fifth to sixth OFDM symbols being the third to fourth OFDM symbols in the second slot of the subframe, respectively; or,
- the first to fourth OFDM symbols are respectively the third to fourth OFDM symbols in the first slot of one subframe and the first OFDM symbol of the subframe The third to fourth OFDM symbols of the two slots, the fifth to sixth OFDM symbols being the sixth to seventh OFDM symbols in the first slot of the subframe, respectively.
- each group of M port CSI-RSs in the M port reference signal pattern is mapped to one sub-band in a time division multiplexing manner and a frequency division multiplexing manner.
- the fifth to sixth OFDM symbols in the first slot of the frame and the fifth to sixth OFDM symbols in the second slot of the subframe are mapped to one sub-band in a time division multiplexing manner and a frequency division multiplexing manner.
- a reference signal mapping apparatus provided by an embodiment of the present disclosure includes: a processor and a memory.
- the processor is configured to read a program in the memory and perform the following process:
- N an integer greater than 16; wherein an N-port CSI-RS in the N-port reference signal pattern is mapped to The RE position is determined according to the RE position to which the plurality of sets of M port CSI-RSs in the M port reference signal pattern are mapped, and M is equal to 4 or 8;
- Resource mapping is performed on the CSI-RS according to the determined RE.
- the memory is capable of storing data used by the processor when performing operations.
- a base station provided by an embodiment of the present disclosure includes: a processor, a memory, a transceiver, and a bus interface;
- the processor is configured to read a program in the memory and perform the following process:
- N an integer greater than 16; wherein an N-port CSI-RS in the N-port reference signal pattern is mapped to The RE position is determined according to the RE position to which the plurality of sets of M port CSI-RSs in the M port reference signal pattern are mapped, and M is equal to 4 or 8;
- Resource mapping is performed on the CSI-RS according to the determined RE.
- the reference signal pattern of the N port is obtained according to the 4-port or 8-port reference signal pattern, and when the reference signal mapping is performed, the CSI-RS is determined to be mapped according to the reference signal pattern of the N port.
- 1a, 1b, and 1c are respectively a 2-port, 4-port, and 8-port reference signal pattern in the related art
- 2a and 2b are respectively 12-port and 16-port reference signal patterns in the LTE Rel-13 in the related art
- FIG. 3 is a schematic flowchart of a reference signal mapping provided by an embodiment of the present disclosure
- 4a, 4b, 4c, and 4d are respectively 32-port reference signal patterns in the method 1 of the embodiment of the present disclosure
- 5a, 5b, 5c, and 5d are respectively 32-port reference signal patterns in the method 2 of the embodiment of the present disclosure
- 6a, 6b, 6c, and 6d are respectively 32-port reference signal patterns in the method 3 of the embodiment of the present disclosure
- 7a, 7b, 7c, and 7d are respectively a 24-port reference signal pattern in the method 1 of the embodiment of the present disclosure
- 8a, 8b, 8c, and 8d are respectively 24-port reference signal patterns in the method 2 of the embodiment of the present disclosure
- 10a, 10b, 10c, and 10d are respectively 18-port reference signal patterns in the embodiments of the present disclosure
- 11a, 11b, 11c, and 11d are respectively 20-port reference signal patterns in the embodiment of the present disclosure.
- 12a, 12b, 12c, and 12d are respectively 28 port reference signal patterns in the embodiment of the present disclosure
- FIG. 13 is a schematic structural diagram of a reference signal mapping apparatus according to an embodiment of the present disclosure.
- FIG. 14 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
- the LTE standard supports 1, 2, 4, 8, 12, and 16 port CSI-RS transmissions, and does not support CSI-RS transmission of more than 16 ports such as 18, 20, 24, 28, or 32 ports.
- the present disclosure embodiment proposes a reference signal mapping method and apparatus capable of supporting 16-port or more CSI-RS transmission such as 18, 20, 24, 28 or 32 ports.
- a reference signal is transmitted on each of the downstream antenna ports.
- An antenna port is a logical port used for transmission, which can correspond to one or more actual physical antennas.
- the definition of the antenna port is defined from the perspective of the receiver, that is, if the receiver needs to distinguish the spatial difference of resources, it is necessary to define multiple antenna ports.
- the reference signal corresponding to an antenna port received by the terminal defines a corresponding antenna port, although the reference signal may be a composite of signals transmitted by multiple physical antennas.
- Step 301 Determine, according to the N-port reference signal pattern, an RE to which the CSI-RS is mapped, where N is an integer greater than 16, wherein an RE position to which an N-port CSI-RS is mapped in the N-port reference signal pattern is According to the RE position to which the plurality of sets of M port CSI-RSs are mapped in the M port reference signal pattern, M is equal to 4 or 8;
- Step 302 Perform resource mapping on the CSI-RS according to the determined RE.
- N is equal to 18, 20, 24, 28 or 32; wherein M is equal to 4 or 8 when N is equal to 24 or 32, and M is equal to 8 when N is equal to 18, 20, 28.
- the base station can configure the terminal N-port CSI-RS.
- the terminal measures the channel on the configured CSI-RS port and feeds back the channel information.
- the test signal pattern determines the location of the RE to which the N-port CSI-RS is mapped, and may specifically include the following situations:
- Case 1-1 For a 24-port CSI-RS mapping or transmission, a 24-port CSI-RS in a 24-port reference signal pattern is mapped to the RE position, and a 4-port 4-port CSI-RS in the 4-port reference signal pattern
- OCC Orthogonal Cover Code
- each group of 4-port CSI-RS is mapped to 4 REs.
- Case 1-2 For a 32-port CSI-RS mapping or transmission, a 32-port CSI-RS in a 32-port reference signal pattern is mapped to the RE position, and a 4-port 4-port CSI-RS in the 4-port reference signal pattern
- each group of 4-port CSI-RS is mapped to 4 REs.
- the symbol position of the RE to which the CSI-RS is mapped is also different, and specifically includes the following cases: :
- the 4-port reference signal pattern used includes 10 groups of 4-port CSI-RSs, of which 4 groups of ports are CSI
- Each group of 4-port CSI-RSs in the -RS is mapped to 4 REs on the first to fourth OFDM symbols in a time division multiplex manner, and each of the 6 groups of 4-port CSI-RSs is 4-port CSI-RS
- the four REs on the fifth to sixth OFDM symbols are mapped in time division multiplexing in combination with frequency division multiplexing; wherein the first to fourth OFDM symbols are symbols in which the DMRS is located.
- the first to fourth OFDM symbols are respectively the first one of the subframes.
- the sixth to seventh OFDM symbols in the slot ie, OFDM symbol 5 and OFDM symbol 6 in slot 0
- the sixth to seventh OFDM symbols in the second slot of the subframe ie, slot
- OFDM symbol 5 and OFDM symbol 6 OFDM symbol 5 and OFDM symbol 6
- the fifth to sixth OFDM symbols are respectively the third to fourth OFDM symbols in the second slot of the subframe (ie, OFDM in slot 1) Symbol 2 and OFDM symbol 3).
- the first to fourth The OFDM symbols are respectively the third to fourth OFDM symbols in the first slot of one subframe (ie, OFDM symbol 2 and OFDM symbol 3 in slot 0) and the second slot in the subframe.
- Three to fourth OFDM symbols ie, OFDM symbol 2 and OFDM symbol 3 in slot 1
- the fifth to sixth OFDM symbols being the sixth to the first of the first slots of the subframe, respectively Seven OFDM symbols (ie, OFDM symbol 5 and OFDM symbol 6 in slot 0).
- each group of 4-port CSI-RSs in the 4-port reference signal pattern used in the above case 1-1 and case 1-2 Mapping to the fifth to sixth OFDM symbols in the first slot of one subframe (ie, OFDM symbol 4 and OFDM symbol 5 in slot 0) in a time division multiplexing manner in combination with frequency division multiplexing.
- the fifth to sixth OFDM symbols in the second slot of the subframe ie, OFDM symbol 4 and OFDM symbol 5 in slot 1).
- the embodiment of the present disclosure redefines the 4-port reference signal pattern as a basis for determining the N-port reference signal pattern. For example, in a case where 14 subframes are included in one subframe, in the redefined 4-port reference signal pattern, 4 groups of 4-port CSI-RSs respectively occupy 4 OFDM symbols, and the 4-port CSI-RS is time-divided.
- the multiplexing mode is mapped to OFDM symbol 5, OFDM symbol 6 in the first slot of the subframe, and OFDM symbol 5, OFDM symbol 6 of the second slot of the subframe; and another 4 groups of 4-port CSI-RS Two OFDM symbols are respectively occupied, and the 4-port CSI-RS is mapped to OFDM symbol 2 and OFDM symbol 3 in the second slot of the subframe by time division multiplexing and frequency division multiplexing.
- the location of the RE to which the N-port CSI-RS is mapped is determined based on the 8-port reference signal pattern, which may include the following situations:
- Case 2-2 For a 20-port CSI-RS mapping or transmission, a 20-port CSI-RS in a 20-port reference signal pattern is mapped to the RE position, and a 4-port 8-port CSI-RS in the 8-port reference signal pattern
- each group of 5-port CSI-RS is mapped to 8 REs.
- Case 2-3 For a 24-port CSI-RS mapping or transmission, a 24-port CSI-RS in a 24-port reference signal pattern is mapped to the RE position, and a 3-port 8-port CSI-RS in the 8-port reference signal pattern The mapped RE locations are the same.
- each group of 8-port CSI-RS is mapped to 8 REs.
- Case 2-4 For a 28-port CSI-RS mapping or transmission, a 28-port CSI-RS in a 28-port reference signal pattern is mapped to the RE position, and a 4-port 8-port CSI-RS in the 8-port reference signal pattern
- each group of 7-port CSI-RS is mapped to 8 REs.
- the RE location to which the 28-port CSI-RS is mapped is the same as the 28 RE locations in the RE locations mapped by the 4 groups of 8-port CSI-RSs in the 8-port reference signal pattern.
- each group of 7-port CSI-RS is mapped to 7 REs.
- Case 2-5 For a 32-port CSI-RS mapping or transmission, a 32-port CSI-RS in a 32-port reference signal pattern is mapped to the RE position, and a 4-port 8-port CSI-RS in the 8-port reference signal pattern The mapped RE locations are the same.
- the symbol position of the RE to which the CSI-RS is mapped is also different, and may specifically include the following cases. :
- the 8-port reference signal pattern used includes five 8-port CSI-RSs, and specifically includes the following two forms:
- Each group of 8-port CSI-RSs contains two packet CSI-RSs, each of which is multiplexed with 4 codewords of 4-bit orthogonal spreading codes, one of which is time-divided by CSI-RS Mapping to 4 REs on the first to fourth OFDM symbols, and another packet CSI-RS is mapped to 4 REs on the fifth to sixth OFDM symbols by time division multiplexing combined with frequency division multiplexing;
- the first to fourth OFDM symbols are symbols in which the DMRS is located.
- Each group of 8-port CSI-RSs is multiplexed with 8-bit orthogonal spreading codes, and an 8-port CSI-RS is mapped to the first to fourth OFDM symbols by time division multiplexing in a frequency division multiplexing manner.
- the first to fourth OFDM symbols are respectively the sixth to seventh OFDM symbols in the first slot of one subframe (ie, slot) in a normal cyclic prefix subframe including 14 OFDM symbols.
- said The fifth to sixth OFDM symbols are respectively the third to fourth OFDM symbols in the second slot of the subframe (ie, OFDM symbol 2 and OFDM symbol 3 in slot 1).
- the first to fourth OFDM symbols are respectively the third to fourth OFDM symbols in the first slot of one subframe (ie, in slot 0) OFDM symbol 2 and OFDM symbol 3) and third to fourth OFDM symbols in the second slot of the subframe (ie, OFDM symbol 2 and OFDM symbol 3 in slot 1)
- the fifth to the fifth Six OFDM symbols are the sixth to seventh of the first slot of the subframe OFDM symbol (ie, OFDM symbol 5 and OFDM symbol 6 in slot 0).
- each group of 8-port CSI-RSs in the 8-port reference signal pattern used in the above cases 2-1 to 2-5 is combined in a time division multiplexing manner.
- the frequency division multiplexing scheme maps to the fifth to sixth OFDM symbols in the first slot of one subframe (ie, OFDM symbol 4 and OFDM symbol 5 in slot 0) and the second timing of the subframe The fifth to sixth OFDM symbols in the slot (ie, OFDM symbol 4 and OFDM symbol 5 in slot 1).
- the embodiment of the present disclosure redefines the 8-port reference signal pattern as a basis for determining the N-port reference signal pattern. For example, in a case where 14 subframes are included in one subframe, in the redefined 8-port reference signal pattern, each group of 8-port CSI-RSs respectively occupy 6 OFDM symbols, and 4 of the ports are time division multiplexed. Mapping to OFDM symbol 5, OFDM symbol 6 in the first slot of the subframe, and OFDM symbol 5 and OFDM symbol 6 of the second slot of the subframe, the remaining 4 ports are combined with time division multiplexing and frequency division The multiplexed manner is mapped to OFDM symbol 2 and OFDM symbol 3 in the second slot of the subframe.
- the following is an example of a 32-port CSI-RS, a 24-port CSI-RS, an 18-port CSI-RS, a 20-port CSI-RS, and a 28-port CSI-RS.
- Method 1 32-port reference signal pattern, 32 RE locations to which a 32-port CSI-RS is mapped, and 32 REs to which 8 groups of 4-port CSI-RSs in a 4-port reference signal pattern are mapped The locations are the same, and each set of 4-port CSI-RSs is multiplexed with 4-bit orthogonal spreading codes.
- 10 groups of 4-port CSI-RSs may be included in one PRB, and 8 groups of 4-port CSI-RSs in the embodiments of the present disclosure may optionally constitute a 32-port CSI-RS.
- 8 sets of 4-port CSI-RS patterns may be arbitrarily selected from OFDM symbol 2 and OFDM symbol 3 in slot 1, and with OFDM symbol 5 in slot 0 and slot 1, and 4 on OFDM symbol 6.
- a group of 4-port CSI-RS pattern combinations form a 32-port CSI-RS pattern.
- Figure 4a exemplarily shows a 32-port reference signal pattern in Method 1.
- each square represents an RE.
- the corresponding cell of each RE is identified by a letter, and the RE of the same letter corresponds to the RE to which a set of 4-port CSI-RSs in the 4-port reference signal pattern is mapped.
- the 32-port reference signal pattern shown in FIG. 4a includes eight groups of 4-port CSI-RSs, and the REs mapped by the eight groups of 4-port CSI-RSs are respectively identified as A, B, C, D, E, F, and I. J, each group of REs has the same RE position as a group of CSI-RSs mapped in the 4-port reference signal pattern.
- the OFDM symbol 5 in slot 0, the RE identified as A on OFDM symbol 6, and the OFDM symbol 5 in slot 1 and the RE identified as A on OFDM symbol 6 form a packet in the form of TDM.
- OFDM symbol 5 in slot 0 and slot 1, and REs identified as B, I, J on OFDM symbol 6 each constitute one packet;
- the OFDM symbol 2 in slot 1 and the REs identified as D, E, and F on OFDM symbol 3 each constitute a packet.
- FIG. 4b exemplarily shows another 32-port reference signal pattern in method 1.
- 4b differs from FIG. 4a in that the OFDM symbol 2 in slot 1 and the CSI-RS packet on OFDM symbol 3 are different.
- the CSI-RS corresponding to the same letter is multiplexed using a set of 4-bit orthogonal spreading codes.
- FIG. 4a and FIG. 4b respectively show only one possible 32-port reference signal pattern, and based on the distribution rule of the foregoing 32-port reference signal pattern, other 32-port reference signal patterns can also be obtained, and no longer List one by one.
- the 32-port reference signal pattern in the DwPTS region of the Time Division Duplexing (TDD) subframe may also be obtained based on the principle of the above method 1.
- Figures 4c and 4d respectively show another 32-port reference signal pattern, wherein the pattern shown in Figure 4c is suitable for DwPTS containing 11 or 12 OFDM symbols, and the pattern shown in Figure 4d is suitable for using an extended CP. The length is 12 symbols of the subframe.
- the 32-port CSI-RS pattern provided by the foregoing method 1 can ensure that 32 CSI-RS ports have the same transmission power, and the orthogonal spreading code used by the port can reuse the spreading code definition in Rel-13.
- Method 2 in the 32-port reference signal pattern, 32 RE locations to which a group of 32-port CSI-RSs are mapped, and 32 REs to which 4 groups of 8-port CSI-RSs in the 8-port reference signal pattern are mapped The positions are the same, and two packet CSI-RSs in each group of 8-port CSI-RSs are respectively multiplexed by 4-bit orthogonal spreading codes, wherein one packet CSI-RS is mapped to REs corresponding to 4 ports. .
- 5 groups of 8-port CSI-RSs may be included in one PRB, and optionally, four groups of 8-port CSI-RSs in the embodiments of the present disclosure constitute a 32-port CSI-RS.
- the REs to which each group of 8-port CSI-RSs are mapped are distributed in OFDM symbol 5, OFDM symbol 6, time slot 1 OFDM symbol 5, OFDM symbol 6, and time slot 1 OFDM symbol 2, OFDM symbol 3.
- OFDM symbol 5 distributed in slot 0 2 REs of OFDM symbol 6, and 2 REs of OFDM symbol 5 and OFDM symbol 6 distributed in slot 1 constitute one Packet, 4 OFDM symbols distributed in slot 1, 2 OFDM symbols 3 RE constitutes a group.
- Figure 5a exemplarily shows a 32 port reference signal pattern in method 2.
- each square represents an RE.
- the square corresponding to each RE is identified by a letter.
- the 32-port reference signal pattern shown in FIG. 5a includes four groups of 8-port CSI-RSs, and the REs mapped to the four groups of 8-port CSI-RSs are respectively identified as A to H, and two sets of REs identified as A and B.
- the RE positions mapped to a group of 8-port CSI-RSs in the 8-port reference signal pattern are the same.
- two sets of REs identified as C and D, two sets of REs identified as E and F, and the identifiers are G and
- the two sets of REs of H are the same as the RE locations mapped to a group of 8-port CSI-RSs in the 8-port reference signal pattern.
- the OFDM symbol 5 in slot 0, the RE identified as A on OFDM symbol 6, and the OFDM symbol 5 in slot 1 and the RE identified as A on OFDM symbol 6 form a packet in the form of TDM.
- OFDM symbol 5 in slot 0 and slot 1, and REs identified as C, E, G on OFDM symbol 6 each constitute one packet;
- OFDM symbol 2 in slot 1 and RE identified as B on OFDM symbol 3 are TDM
- the FDM is combined to form a packet.
- the OFDM symbols in slot 1 and the REs identified as D, F, and H on OFDM symbol 3 each constitute a packet.
- FIG. 5b exemplarily shows another 32-port reference signal pattern in method 2.
- 5b differs from FIG. 5a in that the OFDM symbol 2 in slot 1 and the CSI-RS packet on OFDM symbol 3 are different.
- FIG. 5a and FIG. 5b respectively show only one possible 32-port reference signal pattern. Based on the distribution rule of the foregoing 32-port reference signal pattern, other 32-port reference signal patterns can also be obtained, for example, FIG. 5a.
- the 32-port reference signal pattern in the DwPTS region of the TDD subframe may also be obtained based on the principle of the above method 2.
- Figures 5c and 5d respectively show another 32-port reference signal pattern, wherein the pattern shown in Figure 5c is suitable for DwPTS containing 11 or 12 OFDM symbols, and the pattern shown in Figure 5d is suitable for using an extended CP. The length is 12 symbols of the subframe.
- the 32-port CSI-RS pattern consists of four 8-port CSI-RS patterns (two different letter-represented REs are a group of 8-port CSI-RS patterns), and the same letter corresponds to the CSI-
- FIG. 5c and FIG. 5d only show two possible 32-port reference signal patterns. Based on the distribution rule of the foregoing 32-port reference signal pattern, other 32-port reference signal patterns can also be obtained, and no longer one. An enumeration.
- the 32-port CSI-RS pattern provided by the foregoing method 2 can ensure that 32 CSI-RS ports have the same transmission power, and the orthogonal spreading code used by the port can reuse the spreading code definition in Rel-13.
- 5 groups of 8-port CSI-RSs may be included in one PRB, and optionally, four groups of 8-port CSI-RSs in the embodiments of the present disclosure constitute a 32-port CSI-RS.
- the REs to which each group of 8-port CSI-RSs are mapped are distributed in OFDM symbol 5, OFDM symbol 6, time slot 1 OFDM symbol 5, OFDM symbol 6, and time slot 1 OFDM symbol 2, OFDM symbol 3.
- OFDM symbol 5 distributed in slot 0 2 REs of OFDM symbol 6, OFDM symbol 5 distributed in slot 1, and 2 REs of OFDM symbol 6 and distribution
- the OFDM symbol 2 in slot 1 and the four REs of OFDM symbol 3 form a group.
- Figure 6a exemplarily shows a 32 port reference signal pattern in method 3.
- each square represents an RE.
- the square corresponding to each RE is identified by a letter.
- the 32-port reference signal pattern shown in FIG. 6a includes four groups of 8-port CSI-RSs, and the REs mapped to the four groups of 8-port CSI-RSs are respectively identified as A to D, and the REs and 8-port references identified as A
- the RE positions mapped to a group of 8-port CSI-RSs in the signal pattern are the same.
- a group of REs identified as B, a group of REs identified as C, and a group of REs identified as D are respectively associated with 8
- the RE locations mapped to a group of 8-port CSI-RSs in the port reference signal pattern are the same.
- the OFDM symbol 5 in slot 0 the RE identified as A on OFDM symbol 6, the OFDM symbol 5 in slot 1, the RE identified as A on OFDM symbol 6, and the OFDM symbol 2, OFDM in slot 1.
- the RE identified as A on symbol 3 constitutes a packet in the manner of TDM combined with FDM.
- REs identified as B, C, and D respectively constitute one packet.
- Figure 6b exemplarily shows another 32-port reference signal pattern in method 3.
- 6b differs from FIG. 6a in that the distribution of REs of one packet (ie, the REs to which one 8-port CSI-RS in the 8-port reference signal pattern is mapped) is different on the OFDM symbols in slot 1.
- FIG. 6a and FIG. 6b respectively show only one possible 32-port reference signal pattern.
- other 32-port reference signal patterns can also be obtained, for example, an OFDM symbol. 2.
- the four packet locations and the unused resource locations in the OFDM symbol 3 can be arbitrarily selected and do not overlap each other, and each packet can be further divided into two groups of non-adjacent sub-packets in the frequency domain. List them one by one.
- the 32-port reference signal pattern in the DwPTS region of the TDD subframe may also be obtained based on the principle of the above method 2.
- FIG. 6c and 6d respectively show another 32-port reference signal pattern, wherein the pattern shown in Fig. 6c is applicable to a DwPTS containing 11 or 12 OFDM symbols, and the pattern shown in Fig. 6d is suitable for using an extended CP.
- the length is 12 symbols of the subframe.
- the 32-port CSI-RS pattern consists of four 8-port CSI-RS patterns.
- the code is multiplexed.
- FIG. 6c and FIG. 6d only show two possible 32-port reference signal patterns. Based on the distribution rule of the foregoing 32-port reference signal pattern, other 32-port reference signal patterns can also be obtained, and no longer one. An enumeration.
- Method 1 in the 24-port reference signal pattern, 24 RE locations to which a group of 24-port CSI-RSs are mapped, and 24 REs to which 6 groups of 4-port CSI-RSs in the 4-port reference signal pattern are mapped The locations are the same, and each set of 4-port CSI-RSs is multiplexed with 4-bit orthogonal spreading codes.
- the 10 PRBs may include 10 groups of 4-port CSI-RSs, and the 6 groups of 4-port CSI-RSs in the embodiment of the present disclosure may constitute a 24-port CSI-RS.
- the 6 groups of 4-port CSI-RSs in the embodiment of the present disclosure may constitute a 24-port CSI-RS.
- three sets of 4-port CSI-RS patterns may be arbitrarily selected from OFDM symbol 2 and OFDM symbol 3 in slot 1, and with OFDM symbol 5 in slot 0 and slot 1, and 3 on OFDM symbol 6.
- a group of 4-port CSI-RS pattern combinations form a 24-port CSI-RS pattern.
- Figure 7a exemplarily shows a 24-port reference signal pattern in Method 1.
- the OFDM symbol 5 in slot 1 and the RE identified as B and I on OFDM symbol 6 each constitute one packet; the OFDM symbol 2 in slot 1 and the RE identified as C on OFDM symbol 3 are constructed by TDM combined with FDM.
- the OFDM symbol 2 in slot 1 and the REs identified as D and E on OFDM symbol 3 each constitute a packet.
- Figure 7b exemplarily shows another 24-port reference signal pattern in Method 1.
- the difference between FIG. 7b and FIG. 7a is that the OFDM symbol 2 in slot 1 and the CSI-RS packet on OFDM symbol 3 are different.
- the CSI-RS corresponding to the same letter is multiplexed using a set of 4-bit orthogonal spreading codes.
- FIG. 7a and FIG. 7b respectively show only one possible 24-port reference signal pattern. Based on the distribution pattern of the aforementioned 24-port reference signal pattern, other 24-port reference signal patterns can also be obtained, and no longer List one by one.
- Figures 7c and 7d respectively show another 24-port reference signal pattern, wherein the pattern shown in Figure 7c is suitable for DwPTS containing 11 or 12 OFDM symbols, and the pattern shown in Figure 7d is suitable for using an extended CP. The length is 12 symbols of the subframe.
- the 24-port CSI-RS pattern provided by the foregoing method 1 can ensure that 24 CSI-RS ports have the same transmission power, and the orthogonal spreading code used by the port can reuse the spreading code definition in Rel-13.
- Five groups of 8-port CSI-RSs may be included in one PRB, and three groups of 8-port CSI-RSs may optionally be configured in the embodiments of the present disclosure to form a 24-port CSI-RS.
- Figure 8a exemplarily shows a 24-port reference signal pattern in Method 2.
- the OFDM symbol 5 in slot 0, the RE identified as A on OFDM symbol 6, and the OFDM symbol 5 in slot 1 and the RE identified as A on OFDM symbol 6 form a packet in the form of TDM.
- the OFDM symbol 5 in slot 0 and slot 1 and the RE identified as C on OFDM symbol 6 each constitute one packet; the OFDM symbol 2 in slot 1 and the RE identified as B on OFDM symbol 3 are combined with FDM by TDM.
- the way constitutes a group.
- Figure 8b exemplarily shows another 24-port reference signal pattern in Method 2.
- 8b differs from FIG. 8a in that the OFDM symbol 2 in slot 1 and the CSI-RS packet on OFDM symbol 3 are different.
- FIG. 8a and FIG. 8b respectively show only one possible 24-port reference signal pattern, and other 24-port reference signal patterns can be obtained based on the distribution pattern of the aforementioned 24-port reference signal pattern.
- the 24-port CSI-RS pattern consists of three 8-port CSI-RS patterns (two different letter-represented REs are a group of 8-port CSI-RS patterns), and the same letter corresponds to the CSI-
- FIG. 8c and FIG. 8d only show two possible 24-port reference signal patterns. Based on the distribution pattern of the aforementioned 24-port reference signal pattern, other 24-port reference signal patterns can also be obtained, and no longer one. An enumeration.
- the 24-port CSI-RS pattern provided by the foregoing method 2 can ensure that 24 CSI-RS ports have the same transmission power, and the orthogonal spreading code used by the port can reuse the spreading code definition in Rel-13.
- Five groups of 8-port CSI-RSs may be included in one PRB, and three groups of 8-port CSI-RSs may optionally be configured in the embodiments of the present disclosure to form a 24-port CSI-RS.
- Figure 9a exemplarily shows a 24-port reference signal pattern in method 3.
- the OFDM symbol 5 in slot 0 the RE identified as A on OFDM symbol 6, the OFDM symbol 5 in slot 1, the RE identified as A on OFDM symbol 6, and the OFDM symbol 2 in slot 1.
- the REs identified as A on the OFDM symbol 3 form a packet in the manner of TDM and FDM.
- the REs identified as B and C respectively constitute a packet.
- FIG. 9b exemplarily shows another 24-port reference signal pattern in method 3.
- FIG. 9b differs from FIG. 9a in that the distribution of REs of one packet (ie, REs to which one 8-port CSI-RS in an 8-port reference signal pattern is mapped) is different on the OFDM symbols in slot 1.
- FIG. 9a and FIG. 9b respectively show only one possible 24-port reference signal pattern. Based on the distribution pattern of the aforementioned 24-port reference signal pattern, other 24-port reference signal patterns can also be obtained, and no longer List one by one.
- Figures 9c and 9d respectively show another 24-port reference signal pattern, wherein the pattern shown in Figure 9c is suitable for DwPTS containing 11 or 12 OFDM symbols, and the pattern shown in Figure 9d is suitable for using an extended CP.
- the length is 12 symbols of the subframe.
- the 24-port CSI-RS pattern consists of three 8-port CSI-RS patterns.
- the code is multiplexed.
- FIG. 9c and FIG. 9d only show two possible 24-port reference signal patterns. Based on the distribution pattern of the aforementioned 24-port reference signal pattern, other 24-port reference signal patterns can also be obtained, and no longer one. An enumeration.
- 18-port CSI-RS, 20-port CSI-RS, and 28-port CSI-RS it can be implemented based on the 32-port CSI-RS or 24-port CSI-RS mapping principle described above, except that the 8-port CSI is determined based on the 8-port reference signal pattern.
- RS, 20-port CSI-RS or 28-port CSI-RS mapped to When RE is determined, when the REs mapped to the 24-port CSI-RS or the 32-port CSI-RS are determined based on the 8-port reference signal pattern, the number of CSI-RS ports multiplexed per packet is reduced, and each group of CSI-RSs is mapped to The number of REs has decreased or remained the same.
- 18 RE locations to which a group of 18-port CSI-RSs are mapped, and 18 REs of all REs to which 3 groups of 8-port CSI-RSs in the 8-port reference signal pattern are mapped The location is the same.
- Each group of 6-port CSI-RSs is mapped to 6 REs and multiplexed with 6-bit orthogonal spreading codes.
- Figure 10a exemplarily shows an 18 port reference signal pattern.
- each square represents an RE.
- the square corresponding to each RE is identified by a letter.
- the 18-port reference signal pattern shown in FIG. 10a includes three groups of 6-port CSI-RSs, and the REs mapped by the three groups of 6-port CSI-RSs are respectively identified as A to C.
- Figure 10b exemplarily shows another 18 port reference signal pattern.
- the difference between FIG. 10b and FIG. 10a is that the OFDM symbol 2 in slot 1 and the CSI-RS packet on OFDM symbol 3 are different.
- FIG. 10a and FIG. 10b respectively show only one possible 18-port reference signal pattern. Based on the distribution rule of the aforementioned 18-port reference signal pattern, other 18-port reference signal patterns can also be obtained.
- the 18-port reference signal pattern in the DwPTS region of the TDD subframe may also be obtained based on the above principle.
- Figures 10c and 10d respectively show another 18-port reference signal pattern, wherein the pattern shown in Figure 10c is suitable for DwPTS containing 11 or 12 OFDM symbols, and the pattern shown in Figure 10d is suitable for using an extended CP.
- the length is 12 symbols of the subframe.
- the 18-port CSI-RS pattern consists of three 8-port CSI-RS patterns.
- the CSI-RSs corresponding to the same letter form a packet and are multiplexed using a set of 6-bit orthogonal spreading codes. .
- FIG. 10c and FIG. 10d only show two possible 18-port reference signal patterns. Based on the distribution rule of the aforementioned 18-port reference signal pattern, other 18-port reference signal patterns can also be obtained, and no longer one. An enumeration.
- Another implementation is a 24-port reference signal pattern in which a set of 18-port CSI-RSs are mapped to 24 RE locations, and all REs mapped to 3 groups of 8-port CSI-RSs in an 8-port reference signal pattern. The same location. Each group of 6-port CSI-RSs is mapped to 8 REs, and is multiplexed by 6 codewords of 8-bit orthogonal spreading codes.
- the example diagram is identical to Figures 7a to 7d.
- the 18-port CSI-RS pattern provided above can ensure that all 18 CSI-RS ports have the same transmission power, and the orthogonal spreading code used by the port can reuse the spreading code definition in Rel-13.
- each group of 5-port CSI-RSs is mapped to 5 REs and multiplexed with 5-bit orthogonal spreading codes.
- Figure 11a exemplarily shows a 20 port reference signal pattern.
- each square represents an RE.
- the square corresponding to each RE is identified by a letter.
- the 18-port reference signal pattern shown in FIG. 11a includes four groups of 5-port CSI-RSs, and the REs mapped to the four groups of 5-port CSI-RSs are respectively identified as A to D.
- Figure 11b exemplarily shows another 20 port reference signal pattern.
- the difference between FIG. 11b and FIG. 11a is that the OFDM symbol 2 in slot 1 and the CSI-RS packet on OFDM symbol 3 are different.
- FIG. 11a and FIG. 11b respectively show only one possible 20-port reference signal pattern, and other 20-port reference signal patterns can be obtained based on the distribution rule of the aforementioned 20-port reference signal pattern.
- the 20-port reference signal pattern in the DwPTS region of the TDD subframe may also be obtained based on the above principle.
- FIG. 11c and 11d respectively show another 20-port reference signal pattern, wherein the pattern shown in Fig. 11c is suitable for a DwPTS containing 11 or 12 OFDM symbols, and the pattern shown in Fig. 11d is suitable for using an extended CP.
- the length is 12 symbols of the subframe.
- the 20-port CSI-RS pattern consists of four 8-port CSI-RS patterns, and the CSI-RS corresponding to the same letter.
- a packet is constructed and multiplexed using a set of 5-bit orthogonal spreading codes.
- FIG. 11c and FIG. 11d only show two possible 20-port reference signal patterns. Based on the distribution rule of the foregoing 20-port reference signal pattern, other 20-port reference signal patterns can also be obtained, and no longer one. An enumeration.
- Another implementation is a 32-port reference signal pattern in which a set of 20-port CSI-RSs are mapped to 32 RE locations, and all REs mapped to four 8-port CSI-RSs in an 8-port reference signal pattern. The same location.
- Each group of 5-port CSI-RSs is mapped to 8 REs, and is multiplexed by 5 codewords of 8-bit orthogonal spreading codes.
- the example diagram is identical to Figures 6a to 6d.
- the 20-port CSI-RS pattern provided above can ensure that 20 CSI-RS ports have the same transmission power, and the orthogonal spreading code used by the port can reuse the spreading code definition in Rel-13.
- Figure 12a exemplarily shows a 28 port reference signal pattern.
- each square represents an RE.
- the square corresponding to each RE is identified by a letter.
- the 28-port reference signal pattern shown in FIG. 12a includes four sets of 7-port CSI-RSs, and the REs mapped by the four sets of 7-port CSI-RSs are respectively identified as A to D.
- Figure 12b exemplarily shows another 28 port reference signal pattern.
- the difference between FIG. 12b and FIG. 12a is that the OFDM symbol 2 in slot 1 and the CSI-RS packet on OFDM symbol 3 are different.
- FIG. 12a and FIG. 12b only show one possible 28-port reference signal pattern, respectively, and other 28-port reference signal patterns can be obtained based on the distribution rule of the aforementioned 28-port reference signal pattern.
- the 28-port reference signal pattern in the DwPTS region of the TDD subframe may also be obtained based on the above principle.
- the 28-port CSI-RS pattern consists of four 8-port CSI-RS patterns.
- the CSI-RSs corresponding to the same letter form a packet and are multiplexed using a set of 7-bit orthogonal spreading codes.
- FIG. 12c and FIG. 12d only show two possible 28-port reference signal patterns. Based on the distribution pattern of the aforementioned 28-port reference signal pattern, other 28-port reference signal patterns can also be obtained, and no longer one. An enumeration.
- Another implementation is a 32-port reference signal pattern in which 32 RE-positions of a 28-port CSI-RS are mapped, and all REs mapped to 4 8-port CSI-RSs in an 8-port reference signal pattern. The same location.
- Each group of 7-port CSI-RSs is mapped to 8 REs, and is multiplexed by 7 codewords of 8-bit orthogonal spreading codes.
- the example diagram is identical to Figures 6a to 6d.
- the 28-port CSI-RS pattern provided above can ensure that 28 CSI-RS ports have the same transmission power, and the orthogonal spreading code used by the port can reuse the spreading code definition in Rel-13.
- the reference signal pattern of the 18, 20, 24, 28 or 32 port is obtained according to the 4-port or 8-port reference signal pattern, and when the reference signal mapping is performed, Determining an RE location to which the CSI-RS is mapped according to the reference signal pattern of the 18, 20, 24, 28 or 32 ports, and performing resource mapping on the CSI-RS according to the RE location, thereby implementing 18, 20, 24, 28 or 32-port CSI-RS mapping, which in turn enables the transmission of 18, 20, 24, 28 or 32-port CSI-RS.
- the embodiment of the present disclosure also provides a reference signal mapping device.
- FIG. 13 is a schematic structural diagram of a reference signal mapping apparatus according to an embodiment of the present disclosure, where the apparatus can implement the reference signal mapping process.
- the apparatus can include a determination module 1301 and a mapping module 1302, wherein:
- the determining module 1301 is configured to determine, according to the N port reference signal pattern, the resource unit RE to which the channel state information reference signal CSI-RS is mapped, where N is an integer greater than 16, wherein an N port in the N port reference signal pattern
- the RE location to which the CSI-RS is mapped is based on the M port.
- the position of the RE to which the plurality of sets of M-port CSI-RSs in the reference signal pattern are mapped is determined, and M is equal to 4 or 8;
- the mapping module 1302 is configured to perform resource mapping on the CSI-RS according to the determined RE.
- N is equal to 18, 20, 24, 28 or 32; wherein M is equal to 4 or 8 when N is equal to 24 or 32, and M is equal to 8 when N is equal to 18, 20, 28.
- the determining module 1301 determines the method of the RE to which the channel state information reference signal CSI-RS is mapped according to the N port reference signal pattern, and the format of the M port reference signal pattern. For details, refer to the foregoing embodiment, which is not repeated here.
- FIG. 14 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
- the base station may include: a processor 1401, a memory 1402, a transceiver 1403, and a bus interface.
- the processor 1401 is responsible for managing the bus architecture and general processing, and the memory 1402 can store data used by the processor 1401 in performing operations.
- the transceiver 1403 is configured to receive and transmit data under the control of the processor 1401.
- the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1401 and various circuits of memory represented by memory 1402.
- the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
- the bus interface provides an interface.
- Transceiver 1403 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
- each step of the data transmission process may be completed by an integrated logic circuit of hardware in the processor 1401 or an instruction in the form of software.
- the processor 1401 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or perform embodiments of the present disclosure.
- a general purpose processor can be a microprocessor or any conventional processor or the like.
- the steps of the method disclosed in connection with the embodiments of the present disclosure may be directly embodied as hardware processor execution completion, or using hardware and software in the processor.
- the module combination execution is completed.
- the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
- the storage medium is located in the memory 1402, and the processor 1401 reads the information in the memory 1402, and combines its hardware to complete the steps of the processing method of the control plane.
- the processor 1401 is configured to read a program in the memory 1402 and perform the following process:
- N an integer greater than 16; wherein an N-port CSI-RS in the N-port reference signal pattern is mapped to The RE position is determined according to the RE position to which the plurality of sets of M port CSI-RSs in the M port reference signal pattern are mapped, and M is equal to 4 or 8;
- Resource mapping is performed on the CSI-RS according to the determined RE.
- N is equal to 18, 20, 24, 28 or 32; wherein M is equal to 4 or 8 when N is equal to 24 or 32, and M is equal to 8 when N is equal to 18, 20, 28.
- the method for the processor 1401 to determine the RE to which the channel state information reference signal CSI-RS is mapped according to the N port reference signal pattern, and the format of the M port reference signal pattern can be referred to the foregoing embodiment, and is not repeated here.
- embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
- These computer program instructions can also be stored in a bootable computer or other programmable data processing device.
- a computer readable memory that operates in a particular manner, causing instructions stored in the computer readable memory to produce an article of manufacture comprising an instruction device implemented in one or more flows and/or block diagrams of the flowchart The function specified in the box or in multiple boxes.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Abstract
Description
Claims (20)
- 一种参考信号映射方法,包括:根据N端口参考信号图样,确定信道状态信息参考信号(Channel State Indication Reference Signal,CSI-RS)被映射到的资源单元(Resource Block,RE),N为大于16的整数;其中,所述N端口参考信号图样中一个N端口CSI-RS被映射到的RE位置是根据M端口参考信号图样中的多组M端口CSI-RS被映射到的RE位置确定的,M等于4或8;以及根据确定出的RE对CSI-RS进行资源映射。
- 如权利要求1所述的方法,其中,N等于18、20、24、28或32;其中,当N等于24或32时M等于4或8,当N等于18、20、28时M等于8。
- 如权利要求1或2所述的方法,其中,当N等于18、20、24、28或32时,N端口参考信号图样中的一个N端口CSI-RS被映射到的RE位置,与8端口参考信号图样中的L组8端口CSI-RS被映射的RE位置相同;其中,当N等于18、24时,L等于3,当N等于20、28或32时,L等于4,且:N端口中的每S端口采用8位正交扩频码的8个码字中的S个码字进行复用,并映射到一个8端口CSI-RS所占用的RE位置;其中,当N等于18时S等于6或8,当N等于20时S等于5或8,当N等于28时S等于7或8,当N等于24时S等于8,当N等于32时S等于8;或者,N端口中的每K端口采用K位正交扩频码进行复用,并映射到一个8端口CSI-RS所占用的RE位置中的K个RE位置;其中,当N等于18时K等于6,当N等于20时K等于5,当N等于28时K等于7;或者,N端口中每组8端口CSI-RS被分成两个分组CSI-RS,每个分组分别采用4位正交扩频码的4个码字进行复用,其中,一个分组CSI-RS被映射到4个端口对应的RE上;其中,N等于24或32。
- 如权利要求4所述的方法,其中,N端口参考信号图样中的一个N端口CSI-RS被映射到的RE位置,与8端口参考信号图样中的L组8端口CSI-RS被映射到的L×P个RE的位置相同;其中,当N等于18时P等于6或8,当N等于20时P等于5或8,当N等于28时P等于7或8,当N等于24时P等于8,当N等于32时P等于8。
- 如权利要求1至5中任一项所述的方法,其中,在一个包含14个正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)符号的正常循环前缀子帧或者包含11个或12个OFDM符号的下行导频时隙(Downlink Pilot Time Slot,DwPTS)中,M等于4时,所述4端口参考信号图样中包含10组4端口CSI-RS,其中的4组端口CSI-RS中的每组4端口CSI-RS被以时分复用方式映射到第一至第四OFDM符号上的4个RE,另外6组4端口CSI-RS中的每组4端口CSI-RS被以时分复用结合频分复用方式映射到第五至第六OFDM符号上的4个RE;其中,第一至第四OFDM符号为解调参考信号(DeModulation Reference Signal,DMRS)所在的符号。
- 如权利要求1至5中任一项所述的方法,其中,在一个包含14个OFDM符号的正常循环前缀子帧或者包含11个或12个OFDM符号的DwPTS中,M等于8时,所述8端口参考信号图样中包含5组8端口CSI-RS,其中:每组8端口CSI-RS中包含两个分组CSI-RS,每个分组CSI-RS采用4位正交扩频码的4个码字进行复用,其中一个分组CSI-RS被以时分复用方式映射到第一至第四OFDM符号上的4个RE,另外一个分组CSI-RS被以时分复用结合频分复用方式映射到第五至第六OFDM符号上的4个RE;其中,第一至第四OFDM符号为DMRS所在的符号;或者,每组8端口CSI-RS被以时分复用结合频分复用方式映射到第一至第四OFDM符号上的4个RE和第五至第六OFDM符号上的4个RE;其中,第一至第四OFDM符号为DMRS所在的符号。
- 如权利要求6或7所述的方法,其中,在一个包含14个OFDM符号的正常循环子帧中,所述第一至第四OFDM符号分别为一个子帧的第一个时隙中第六个至第七个OFDM符号以及该子帧的第二个时隙中的第六个至第七个OFDM符号,所述第五至第六OFDM符号分别为该子帧的第二个时隙中 的第三个至第四个OFDM符号;或者,在一个包含11个或12个OFDM符号的DwPTS中,所述第一至第四OFDM符号分别为一个子帧的第一个时隙中第三个至第四个OFDM符号以及该子帧的第二个时隙中的第三个至第四个OFDM符号,所述第五至第六OFDM符号分别为该子帧的第一个时隙中的第六个至第七个OFDM符号。
- 如权利要求1至5中任一项所述的方法,其中,在一个扩展循环前缀子帧的12个OFDM符号中,所述M端口参考信号图样中的每组M端口CSI-RS被以时分复用方式结合频分复用方式映射到一个子帧的第一个时隙中的第五个至第六个OFDM符号以及该子帧的第二个时隙中的第五个至第六个OFDM符号。
- 一种参考信号映射装置,包括:确定模块,用于根据N端口参考信号图样,确定信道状态信息参考信号CSI-RS被映射到的资源单元RE,N为大于16的整数;其中,所述N端口参考信号图样中一个N端口CSI-RS被映射到的RE位置是根据M端口参考信号图样中的多组M端口CSI-RS被映射到的RE位置确定的,M等于4或8;以及映射模块,用于根据确定出的RE对CSI-RS进行资源映射。
- 如权利要求10所述的装置,其中,N等于18、20、24、28或32;其中,当N等于24或32时M等于4或8,当N等于18、20、28时M等于8。
- 如权利要求10或11所述的装置,其中,当N等于18、20、24、28或32时,N端口参考信号图样中的一个N端口CSI-RS被映射到的RE位置,与8端口参考信号图样中的L组8端口CSI-RS被映射的RE位置相同;其中,当N等于18、24时,L等于3,当N等于20、28或32时,L等于4,且:N端口中的每S端口采用8位正交扩频码的8个码字中的S个码字进行 复用,并映射到一个8端口CSI-RS所占用的RE位置;其中,当N等于18时S等于6或8,当N等于20时S等于5或8,当N等于28时S等于7或8,当N等于24时S等于8,当N等于32时S等于8;或者,N端口中的每K端口采用K位正交扩频码进行复用,并映射到一个8端口CSI-RS所占用的RE位置中的K个RE位置;其中,当N等于18时K等于6,当N等于20时K等于5,当N等于28时K等于7;或者,N端口中每组8端口CSI-RS被分成两个分组CSI-RS,每个分组分别采用4位正交扩频码的4个码字进行复用,其中,一个分组CSI-RS被映射到4个端口对应的RE上;其中,N等于24或32。
- 如权利要求13所述的装置,其中,N端口参考信号图样中的一个N端口CSI-RS被映射到的RE位置,与8端口参考信号图样中的L组8端口CSI-RS被映射到的P个RE的位置相同;其中,当N等于18时P等于6或8,当N等于20时P等于5或8,当N等于28时P等于7或8,当N等于24时P等于8,当N等于32时P等于8。
- 如权利要求10至14中任一项所述的装置,其中,在一个包含14个OFDM符号的正常循环前缀子帧或者包含11个或12个OFDM符号的DwPTS中,M等于4时,所述4端口参考信号图样中包含10组4端口CSI-RS,其中的4组端口CSI-RS中的每组4端口CSI-RS被以时分复用方式映射到第一至第四OFDM符号上的4个RE,另外6组4端口CSI-RS中的每组4端口CSI-RS被以时分复用结合频分复用方式映射到第五至第六OFDM符号上的4个RE;其中,第一至第四OFDM符号为解调参考信号DMRS所在的符号。
- 如权利要求10至14中任一项所述的装置,其中,在一个包含14个OFDM符号的正常循环前缀子帧或者包含11个或12个OFDM符号的DwPTS中,M等于8时,所述8端口参考信号图样中包含5组8端口CSI-RS,其中:每组8端口CSI-RS中包含两个分组CSI-RS,每个分组CSI-RS采用4位正交扩频码的4个码字进行复用,其中一个分组CSI-RS被以时分复用方式映射到第一至第四OFDM符号上的4个RE,另外一个分组CSI-RS被以时分复用结合频分复用方式映射到第五至第六OFDM符号上的4个RE;其中,第一至第四OFDM符号为DMRS所在的符号;或者,每组8端口CSI-RS被以时分复用结合频分复用方式映射到第一至第四OFDM符号上的4个RE和第五至第六OFDM符号上的4个RE;其中,第一至第四OFDM符号为DMRS所在的符号。
- 如权利要求15或16所述的装置,其中,在一个包含14个OFDM符号的正常循环子帧中,所述第一至第四OFDM符号分别为一个子帧的第一个时隙中第六个至第七个OFDM符号以及该子帧的第二个时隙中的第六个至第七个OFDM符号,所述第五至第六OFDM符号分别为该子帧的第二个时隙中的第三个至第四个OFDM符号;或者,在一个包含11个或12个OFDM符号的DwPTS中,所述第一至第四OFDM符号分别为一个子帧的第一个时隙中第三个至第四个OFDM符号以及该子帧的第二个时隙中的第三个至第四个OFDM符号,所述第五至第六OFDM符号分别为该子帧的第一个时隙中的第六个至第七个OFDM符号。
- 如权利要求10至16中任一项所述的装置,其中,在一个扩展循环前缀子帧的12个OFDM符号中,所述M端口参考信号图样中的每组M端口CSI-RS被以时分复用方式结合频分复用方式映射到一个子帧的第一个时隙中的第五个至第六个OFDM符号以及该子帧的第二个时隙中的第五个至第六个OFDM符号。
- 一种参考信号映射装置,包括:处理器和存储器,其中:所述处理器用于读取存储器中的程序,执行下列过程:根据N端口参考信号图样,确定信道状态信息参考信号CSI-RS被映射到的资源单元RE,N为大于16的整数;其中,所述N端口参考信号图样中一个N端口CSI-RS被映射到的RE位置是根据M端口参考信号图样中的多组M端口CSI-RS被映射到的RE位置确定的,M等于4或8;以及根据确定出的RE对CSI-RS进行资源映射,所述存储器能够存储处理器在执行操作时所使用的数据。
- 一种基站,包括:处理器、存储器和收发机,其中:所述处理器用于读取存储器中的程序,执行下列过程:根据N端口参考信号图样,确定信道状态信息参考信号CSI-RS被映射到的资源单元RE,N为大于16的整数;其中,所述N端口参考信号图 样中一个N端口CSI-RS被映射到的RE位置是根据M端口参考信号图样中的多组M端口CSI-RS被映射到的RE位置确定的,M等于4或8;以及根据确定出的RE对CSI-RS进行资源映射,所述收发机用于接收和发送数据,所述存储器能够存储处理器在执行操作时所使用的数据。
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