CN109586871B - CSI-RS transmission method and device - Google Patents
CSI-RS transmission method and device Download PDFInfo
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- CN109586871B CN109586871B CN201710911399.2A CN201710911399A CN109586871B CN 109586871 B CN109586871 B CN 109586871B CN 201710911399 A CN201710911399 A CN 201710911399A CN 109586871 B CN109586871 B CN 109586871B
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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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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Abstract
The application discloses a CSI-RS transmission method and a device, wherein the method comprises the following steps: the method comprises the steps that network side equipment determines pilot frequency configuration of an X port CSI-RS; x is a positive integer; numbering ports of the X port CSI-RS according to the pilot frequency configuration of the X port CSI-RS, and mapping the CSI-RS of each port in the X port CSI-RS to antenna ports with the same number as the ports for transmission; the ports of all CDM groups contained in the X port CSI-RS are numbered sequentially according to the sequence of a frequency domain first and a time domain second, and the numbering of the ports in the same CDM group has continuity. The technical problem that the overhead of pilot frequency resources is large when a plurality of CSI-RS resources are configured in the prior art is solved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a CSI-RS transmission method and apparatus.
Background
In the NR system, a Channel State Information Reference Signal (CSI-RS) for acquiring Channel State Information (CSI) defines the following four basic component CSI-RS RE patterns (component CSI-RS RE patterns) when the Port density is 1RE/PRB/Port, and the four basic component CSI-RS RE patterns in one PRB are as shown in fig. 1:
the 1-port member CSI-RS RE pattern is composed of 1 Resource Element (RE);
the 2-port member CSI-RS RE pattern is composed of 2 REs adjacent to each other in frequency domain on one OFDM symbol;
the 4-port member CSI-RS RE pattern contains two patterns, one is composed of 4 REs adjacent in frequency domain on one OFDM symbol (pattern a), and the other is composed of 4 REs adjacent in frequency domain on 2 OFDM symbols adjacent in time domain (pattern b).
The patterns for the CSI-RS for the higher ports are aggregated from the four basic member CSI-RS RE patterns, as shown in table 1:
TABLE 1
In table 1, X represents the number of ports, N represents the number of OFDM symbols occupied by the X-port CSI-RS, (Y, Z) represents that one member CSI-RS RE pattern occupies Y REs in the frequency domain and Z REs in the time domain, Code Division Multiplexing (CDM) represents a pilot multiplexing mode of resource block REs, and FD-CDM2 represents that 2 REs in the frequency domain adopt Code Division multiplexing. For example, the port CSI-RS with X ═ 16 is aggregated from 4-port member CSI-RS RE patterns (pattern b shown in fig. 1).
In the prior art, each X port CSI-RS occupies a corresponding time-frequency resource and is mapped to an antenna port corresponding to the time-frequency resource for transmission. When the number of the configured CSI-RS resources is large, more time-frequency resources are occupied, so that the overhead of pilot frequency resources is too large, and the problem of resource waste exists. For example, when the Port density is 1RE/PRB/Port, if one X-32 Port CSI-RS and one X-16 Port CSI-RS are configured, time-frequency resources of 32+ 16-48 REs need to be occupied.
Disclosure of Invention
The application provides a CSI-RS transmission method and device, which are used for solving the technical problem that in the prior art, when the number of configured CSI-RS resources is large, the overhead of pilot frequency resources is large.
In a first aspect, the present application provides a CSI-RS transmission method, including:
the method comprises the steps that network side equipment determines pilot frequency configuration of an X port channel state information reference signal CSI-RS; x is a positive integer;
numbering ports of the X port CSI-RS according to the pilot frequency configuration of the X port CSI-RS, and mapping the CSI-RS of each port in the X port CSI-RS to antenna ports with the same number as the ports for transmission;
the ports of all code division multiplexing CDM groups contained in the X port CSI-RS are sequentially numbered according to the sequence of frequency domain first and time domain second, and the numbering of the ports in the same CDM group has continuity.
In an optional implementation manner, the pilot configuration of the X-port CSI-RS includes a configuration of a pilot multiplexing manner, where the pilot multiplexing manner includes frequency domain code division multiplexing FD-CDM2 of 2 ports, code division multiplexing CDM4 of 4 ports, or code division multiplexing CDM8 of 8 ports.
In an optional implementation manner, when the pilot multiplexing manner is configured as FD-CDM2, and the X-port CSI-RS occupies 4 OFDM symbols, the port time domain numbers of all CDM groups included in the X-port CSI-RS include:
numbering is performed according to the sequence of the first OFDM symbol, the third OFDM symbol, the second OFDM symbol and the last fourth OFDM symbol.
In an optional implementation manner, when the pilot multiplexing manner is configured as FD-CDM2, numbering ports of an X-port CSI-RS according to the pilot configuration of the X-port CSI-RS includes:
using formulas
Determining a number of each port within an ith CDM group of the all CDM groups;
wherein, the p is(i)For the number of each port in the ith CDM group in all CDM groups, N represents the number of OFDM symbols occupied by the X-port CSI-RS,
indicating the number of ports within one CDM group, when the pilot multiplexing scheme is configured as FD-CDM2,
p0mod (x, y) denotes x modulo y, the starting number of the port,
meaning rounded down, i ∈ {0, 1., N · K-1},
l(0)＝0,l(1)＝N/2,l(2)＝1,l(3)＝3。
in an optional implementation manner, the method further includes:
the value of X is 1, 2, 4, 8, 12, 16, 24 and 32; and the value of N is 1, 2 and 4.
In a second aspect, a network-side device is provided, including:
the device comprises a determining unit, a judging unit and a judging unit, wherein the determining unit is used for determining the pilot frequency configuration of an X port channel state information reference signal CSI-RS; x is a positive integer;
the transmission unit is used for numbering the ports of the X port CSI-RS according to the pilot frequency configuration of the X port CSI-RS, and mapping the CSI-RS of each port in the X port CSI-RS to the antenna ports with the same numbers to transmit; the ports of all code division multiplexing CDM groups contained in the X port CSI-RS are sequentially numbered according to the sequence of frequency domain first and time domain second, and the numbering of the ports in the same CDM group has continuity.
In an optional implementation manner, the pilot configuration of the X-port CSI-RS includes a configuration of a pilot multiplexing manner, where the pilot multiplexing manner includes frequency domain code division multiplexing FD-CDM2 of 2 ports, code division multiplexing CDM4 of 4 ports, or code division multiplexing CDM8 of 8 ports.
In an optional implementation manner, when the pilot multiplexing mode is configured as FD-CDM2, and the X-port CSI-RS occupies 4 OFDM symbols, the transmission unit is configured to time-domain number the ports of all CDM groups included in the X-port CSI-RS in an order of a first OFDM symbol, a third OFDM symbol, and a last fourth OFDM symbol of the second OFDM symbol.
In an alternative implementation, when the pilot multiplexing mode is configured as FD-CDM2, the transmission unit is further configured to utilize a formula
Determining a number of each port within an ith CDM group of the all CDM groups; wherein, the p is(i)For the number of each port in the ith CDM group in all CDM groups, N represents the number of OFDM symbols occupied by the X-port CSI-RS,
indicating the number of ports within one CDM group, when the pilot multiplexing scheme is configured as FD-CDM2,
p0mod (x, y) denotes x modulo y, the starting number of the port,
meaning rounded down, i ∈ {0, 1., N · K-1},
l(0)＝0,l(1)＝N/2,l(2)＝1,l(3)＝3。
in an optional implementation manner, the X-port CSI-RS is any one of a 1-port CSI-RS, a 2-port CSI-RS, a 4-port CSI-RS, an 8-port CSI-RS, a 12-port CSI-RS, a 16-port CSI-RS, a 24-port CSI-RS, and a 32-port CSI-RS; the number of OFDM symbols occupied by the X port CSI-RS is 1, 2 or 4.
In a third aspect, a computer apparatus is provided, the computer apparatus comprising a processor configured to implement the method according to any one of the optional implementations of the first aspect when executing a computer program stored in a memory.
In a fourth aspect, a computer-readable storage medium is provided, which stores computer instructions that, when executed on a computer, cause the computer to perform the method according to any one of the optional implementations of the first aspect.
The beneficial effect of this application is as follows:
in the method provided by the embodiment of the application, the ports are numbered sequentially according to the sequence of frequency domain first and time domain later, and the ports in the same CDM group are numbered adjacently; meanwhile, the mapping from the ports to the antenna ports by adopting the mapping rules described in the formula can achieve the purpose of realizing port sharing among the CSI-RS resources with different port numbers, namely, the CSI-RS resources with low port numbers can use a part of time-frequency resources occupied by the CSI-RS resources with high port numbers, so that the expense of pilot frequency resources can be effectively saved.
Drawings
FIG. 1 illustrates four basic prior art component CSI-RS RE patterns within a PRB;
fig. 2 is a flowchart illustrating a CSI-RS transmission method according to an embodiment of the present application;
fig. 3 is a numbering schematic diagram of a 32-port CSI-RS including 16 CDM groups according to an embodiment of the present disclosure;
fig. 4 is a diagram illustrating the numbering of antenna ports of a (8,2) antenna configuration determined according to the definition of a codebook in the prior art;
fig. 5 is a diagram illustrating the numbering of antenna ports of a (6,2) antenna configuration determined according to the definition of a codebook in the prior art;
fig. 6 is a numbering schematic diagram of a 24-port CSI-RS implemented by the method provided in the embodiment of the present application, including 12 CDM groups;
fig. 7 is a schematic structural diagram of a network-side device according to an embodiment of the present application.
Detailed Description
Aiming at the problems in the prior art, the embodiment of the application provides a CSI-RS transmission method, wherein network side equipment determines the pilot frequency configuration of an X port CSI-RS; x is a positive integer; numbering ports of the X port CSI-RS according to the pilot frequency configuration of the X port CSI-RS, and mapping the CSI-RS of each port in the X port CSI-RS to antenna ports with the same number as the ports for transmission; the ports of all CDM groups contained in the X port CSI-RS are numbered sequentially according to the sequence of a frequency domain first and a time domain second, and the numbering of the ports in the same CDM group has continuity.
In the method provided by the embodiment of the present application, the ports are sequentially numbered according to the sequence of frequency domain first and time domain second, and the numbers of the ports in the same CDM group are adjacent; therefore, the mapping from the ports to the antenna ports can achieve the purpose of sharing ports with different numbers, thereby effectively saving the overhead of pilot frequency resources. The scheme provided by the present application is further illustrated below with reference to specific examples:
example one
As shown in fig. 2, an embodiment of the present application provides a CSI-RS transmission method, which may specifically include the steps of:
in this embodiment, as the pilot configuration type of the X-port CSI-RS provided in table 1, if the pilot multiplexing manner of the resource elements REs includes FD-CDM2, the X-port CSI-RS contains X/2 CDM groups, the number of ports in one CDM group
One port corresponds to one RE, and two ports in each CDM group correspond to two REs adjacent to the frequency domain located on the same OFDM symbol.
102, numbering ports of the X port CSI-RS according to pilot frequency configuration of the X port CSI-RS, and mapping the CSI-RS of each port in the X port CSI-RS to antenna ports with the same numbers to transmit;
the ports of all CDM groups contained in the X port CSI-RS are numbered sequentially according to the sequence of a frequency domain first and a time domain second, and the numbering of the ports in the same CDM group has continuity.
In this embodiment, all CDM groups are numbered sequentially in the order of frequency domain first and time domain later, that is, all ports included in the X-port CSI-RS are numbered.
Based on the pilot configuration shown in table 1, the pilot configuration of the X-port CSI-RS includes a configuration of a pilot multiplexing mode, where the pilot multiplexing mode includes frequency domain code division multiplexing FD-CDM2 of 2 ports, code division multiplexing CDM4 of 4 ports, or code division multiplexing CDM8 of 8 ports.
In order to implement the purpose of port sharing, for the case that the pilot multiplexing configuration in the pilot configuration of the X-port CSI-RS is FD-CDM2, and the X-port CSI-RS occupies 4 OFDM symbols (it can be determined according to the time sequence that the 4 OFDM symbols are: a first OFDM symbol, a second OFDM symbol, a third OFDM symbol, and a fourth OFDM symbol), on the premise that the ports are sequentially numbered based on the sequence from the frequency domain to the time domain, the time domain numbering may specifically be:
numbering is performed according to the sequence of the first OFDM symbol, the third OFDM symbol, the second OFDM symbol and the last fourth OFDM symbol.
Based on the pilot configuration shown in table 1, the value X of the X port CSI-RS in the embodiment of the present application may be any one of 1, 2, 4, 8, 12, 16, 24, and 32; and the number of OFDM symbols occupied by the X-port CSI-RS may be 1, 2, or 4.
When the pilot multiplexing mode is configured as FD-CDM2, in order to determine the number of each port more efficiently and quickly, specifically, the implementation manner of the pilot configuration of the X-port CSI-RS for numbering the ports of the X-port CSI-RS may be:
using formulas
Determining a number of each port within an ith CDM group of the all CDM groups; wherein N represents the number of OFDM symbols occupied by the X port CSI-RS,
indicating the number of ports within one CDM group, when the pilot multiplexing scheme is configured as FD-CDM2,
p0mod (x, y) denotes x modulo y, the starting number of the port,
meaning rounded down, i ∈ {0, 1., N · K-1},
l(0)＝0,l(1)＝N/2,l(2)＝1,l(3)＝3。
when numbering is performed according to the above formula, the numbering sequence of the time domain numbers for different OFDM symbols may be:
when the X port CSI-RS occupies 2 OFDM symbols, the time domain numbering sequence of the X port CSI-RS is as follows: a first OFDM symbol, then a second OFDM symbol;
when the X-port CSI-RS occupies 4 OFDM symbols, the time domain numbering sequence of the X-port CSI-RS is a first OFDM symbol, a third OFDM symbol, a second OFDM symbol and a fourth OFDM symbol in sequence.
In the scheme provided by the embodiment of the application, the OFDM symbols are numbered sequentially according to the sequence of the frequency domain first and the time domain later, and the numbers of the ports in the same CDM group are adjacent; and further, the number of the port is determined by adopting a mapping rule described in a formula, so that after the CSI-RS resource with a high port number is subjected to the mapping between the CSI-RS and the antenna port, the CSI-RS resource with a low port number can be regarded as a part of the CSI-RS resource with a high port number, and a part of time-frequency resources occupied by the CSI-RS resource with a high port number is directly used, so that the port sharing can be realized, and the technical effect of effectively saving the pilot frequency resource overhead is achieved.
For more detailed description, in the embodiments provided in the present application, the mapping relationship between ports and antenna ports is further described in detail below with reference to the drawings of the specification, and the specific implementation manner may be:
for example, one: for example, if the X-port CSI-RS is a 32-port CSI-RS, the correspondence relationship between each port in the 32-port CSI-RS and the antenna port number may be:
according to the aggregation manner of the X-port CSI-RS shown in table 1, the 32-port CSI-RS may be obtained by aggregating 8 4-port CSI-RSs (pattern b shown in fig. 1), and the 32-port CSI-RS occupies N — 4 OFDM symbols. If the pilot multiplexing mode of the 32-port CSI-RS is configured as FD-CDM2 (one FD-CDM2 group includes two adjacent REs in frequency domain located on the same OFDM symbol), the 32-port CSI-RS includes 16 CDM groups (as shown in fig. 3). The two ports within each CDM group share two REs in a multiplexing manner of FD-CDM 2. As shown in fig. 3, CDM port 0 in the 32-port CSI-RS uses code (1,1) to occupy two REs in the CDM group, and port 1 uses code (1, -1) to occupy two REs in the CDM group.
When the antenna configuration corresponding to the 32-port CSI-RS is (N1, N2) ═ 8,2, where N1 denotes the number of antenna ports of the first dimension and N2 denotes the number of antenna ports of the second dimension. The number of antenna ports that can determine this antenna configuration according to the definition of the codebook in the prior art is shown in fig. 4.
According to the mapping rule given in the formula of the embodiment of the present application, 16 CDM groups are numbered sequentially in the order of frequency domain first and time domain later, as shown in fig. 3. Assuming that P0 is 0, the port number of each CDM group can be obtained according to the formula in the embodiment of the present application, as shown in fig. 3. Numbering the 4 CDM groups in frequency domain order on the first OFDM symbol; numbered 0,1, 2,3, 4,5, 6,7, and then numbered 8,9, 10,11, 12,13, 14,15, in frequency domain order for the 4 CDM groups on the third OFDM symbol. And then numbering the 4 CDM groups on the second OFDM symbol according to the frequency domain sequence, and finally numbering the 4 CDM groups on the fourth OFDM symbol according to the frequency domain sequence.
After numbering the ports, mapping the numbered ports to the antenna ports with the same number in fig. 4 for transmission.
In this embodiment, 16-port CSI-RS at FD-CDM2 can be aggregated by CDM group 0 to CDM group 7, and transmitted using 16 antenna ports in the rectangular box in fig. 4, which can implement sharing with 16-port CSI-RS; 8-port CSI-RS at FD-CDM2 can be aggregated by CDM group 0, CDM group 1, CDM group 4, and CDM group 5, and can be transmitted using 8 antenna ports in the square box in fig. 4, which can achieve sharing with 8-port CSI-RS.
Example two: antenna port number used by the 24-port CSI-RS:
according to table one, the 24-port CSI-RS is aggregated from 6 4-port (pattern b) CSI-RS resources, and occupies 4 OFDM symbols. When the pilot multiplexing mode of the configured 24-port CSI-RS is FD-CDM2, where X equals to 24-port CSI-RS and the antenna configuration corresponding to the 24-port CSI-RS is (N1, N2) ═ 6,2, it can be determined that the number of the antenna port of the antenna configuration is as shown in fig. 5 according to the definition of the codebook in the prior art.
According to the mapping rule given in the formula of the present invention, 12 CDM groups are sequentially numbered in the order of frequency domain first and time domain second, as shown in fig. 6. Assuming that P0 is 0, a port number of each CDM group can be obtained according to the formula in the present invention, as shown in fig. 6. After the 3 CDM groups are numbered in frequency domain order on the first OFDM symbol, the 3 CDM groups are numbered in frequency domain order on the third OFDM symbol. And then numbering the 3 CDM groups on the second OFDM symbol according to the frequency domain sequence, and finally numbering the 3 CDM groups on the fourth OFDM symbol according to the frequency domain sequence. The numbered ports are mapped to the antenna ports with the same number in fig. 5 for transmission.
The 12-port CSI-RS at FD-CDM2 can be aggregated from CDM group 0 to CDM group 2, and transmitted using 12 antenna ports in the rectangular box in fig. 5, so as to implement sharing with the 12-port CSI-RS; 8-port CSI-RS at FD-CDM2 can be aggregated by CDM group 0, CDM group 1, CDM group 3, and CDM group 4, and can be transmitted using 8 antenna ports in the square box in fig. 5, which can achieve sharing with 8-port CSI-RS.
Example two
As shown in fig. 7, an embodiment of the present application further provides a network-side device, where the network-side device may specifically include:
a determining unit 701, configured to determine a pilot configuration of an X port CSI-RS; x is a positive integer;
the pilot configuration of the X-port CSI-RS includes a configuration of a pilot multiplexing mode, where the pilot multiplexing mode includes frequency domain code division multiplexing FD-CDM2 of 2 ports, code division multiplexing CDM4 of 4 ports, or code division multiplexing CDM8 of 8 ports.
A transmission unit 702, configured to number ports of the X-port CSI-RS according to the pilot configuration of the X-port CSI-RS, and map the CSI-RS of each port in the X-port CSI-RS to an antenna port with the same number as the CSI-RS for transmission; the ports of all CDM groups contained in the X port CSI-RS are numbered sequentially according to the sequence of a frequency domain first and a time domain second, and the numbering of the ports in the same CDM group has continuity.
When the pilot multiplexing mode is configured as FD-CDM2, and the X-port CSI-RS occupies 4 OFDM symbols, the transmission unit 702 is configured to perform time domain numbering on ports of all CDM groups included in the X-port CSI-RS according to an order of a first OFDM symbol, a third OFDM symbol, and a last fourth OFDM symbol of the second OFDM symbol.
Optionally, when the pilot multiplexing mode is configured as FD-CDM2, the transmission unit 702 is further configured to utilize a formulaDetermining a number of each port within an ith CDM group of the all CDM groups; wherein, the p is(i)For the number of each port in the ith CDM group in all CDM groups, N represents the number of OFDM symbols occupied by the X-port CSI-RS,
indicating the number of ports within one CDM group, when the pilot multiplexing scheme is configured as FD-CDM2,
p0mod (x, y) denotes x modulo y, the starting number of the port,
meaning rounded down, i ∈ {0, 1., N · K-1},
l(0)＝0,l(1)＝N/2,l(2)＝1,l(3)＝3。。
optionally, the X port CSI-RS is any one of a 1 port CSI-RS, a 2 port CSI-RS, a 4 port CSI-RS, an 8 port CSI-RS, a 12 port CSI-RS, a 16 port CSI-RS, a 24 port CSI-RS, and a 32 port CSI-RS; the number of OFDM symbols occupied by the X port CSI-RS is 1, 2 or 4.
EXAMPLE III
Embodiments of the present application also provide a computer-readable storage medium, which stores computer instructions, and when the computer instructions are executed on a computer, the steps of the CSI-RS transmission method provided in the first embodiment of the present application may be implemented.
In addition, an embodiment of the present application may also provide a computer apparatus, where the computer apparatus includes a processor, and the processor is configured to implement the CSI-RS transmission method provided in the first embodiment when executing a computer program stored in a memory.
The scheme provided by the embodiment of the application is numbered sequentially according to the sequence of the OFDM symbols from the frequency domain to the time domain, and the numbers of the ports in the same CDM group are adjacent; and further, the number of the port is determined by adopting a mapping rule described in a formula, so that after the CSI-RS resource with a high port number is subjected to the mapping between the CSI-RS and the antenna port, the CSI-RS resource with a low port number can be regarded as a part of the CSI-RS resource with a high port number, and a part of time-frequency resources occupied by the CSI-RS resource with a high port number is directly used, so that the port sharing can be realized, and the technical effect of effectively saving the pilot frequency resource overhead is achieved.
In the embodiments of the present invention, it should be understood that the disclosed data processing method and data processing apparatus may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical or other form.
The functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be an independent physical module.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application 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, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (8)
1. A method for transmitting CSI-RS (channel state information-reference signals), comprising:
the method comprises the steps that network side equipment determines pilot frequency configuration of an X port channel state information reference signal CSI-RS; wherein, X is a positive integer, and the pilot configuration of the X port CSI-RS comprises the configuration of a pilot multiplexing mode;
when the pilot multiplexing mode is configured as FD-CDM2, the formula is utilized
Determining the number of each port in the ith CDM group in all code division multiplexing CDM groups contained in the X port CSI-RS; wherein, the p is(i)For the number of each port in the ith CDM group in all CDM groups, N represents the number of OFDM symbols occupied by the X-port CSI-RS,
indicating the number of ports within one CDM group, when the pilot multiplexing scheme configures FD-CDM2,
p0mod (x, y) denotes x modulo y, the starting number of the port,
meaning rounded down, i ∈ {0, 1., N · K-1},
l(0)＝0,l(1)＝N/2,l(2)＝1,l(3)＝3；
and mapping the CSI-RS of each port in the X port CSI-RS to the antenna port with the same number as the X port CSI-RS for transmission.
2. The method of claim 1, wherein the pilot multiplexing manner further comprises 4-port Code Division Multiplexing (CDM) 4 or 8-port code division multiplexing (CDM 8).
3. The method of claim 1, further comprising:
the value of X is 1, 2, 4, 8, 12, 16, 24 and 32; and the value of N is 1, 2 and 4.
4. A network-side device, comprising:
the device comprises a determining unit, a judging unit and a judging unit, wherein the determining unit is used for determining the pilot frequency configuration of an X port channel state information reference signal CSI-RS; wherein, X is a positive integer, and the pilot configuration of the X port CSI-RS comprises the configuration of a pilot multiplexing mode;
a transmission unit for utilizing a formula when the pilot multiplexing scheme is configured as FD-CDM2
Determining the number of each port in the ith CDM group in all code division multiplexing CDM groups contained in the X port CSI-RS; wherein, the p is(i)For the number of each port in the ith CDM group in all CDM groups, N represents the number of OFDM symbols occupied by the X-port CSI-RS,
indicating the number of ports within one CDM group, when the pilot multiplexing scheme configures FD-CDM2,
p0mod (x, y) denotes x modulo y, the starting number of the port,
meaning rounded down, i ∈ {0, 1., N · K-1},
l (0) ═ 0, l (1) ═ N/2, l (2) ═ 1, l (3) ═ 3; and mapping the CSI-RS of each port in the X port CSI-RS to the antenna port with the same number as the X port CSI-RS for transmission.
5. The network-side device of claim 4, wherein the pilot multiplexing pattern further comprises 4-port Code Division Multiplexing (CDM) 4 or 8-port code division multiplexing (CDM 8).
6. The network-side device of claim 4, wherein the X-port CSI-RS is any one of a 1-port CSI-RS, a 2-port CSI-RS, a 4-port CSI-RS, an 8-port CSI-RS, a 12-port CSI-RS, a 16-port CSI-RS, a 24-port CSI-RS, and a 32-port CSI-RS; the number of OFDM symbols occupied by the X port CSI-RS is 1, 2 or 4.
7. A computer arrangement, characterized in that the computer arrangement comprises a processor for implementing the method according to any of claims 1-3 when executing a computer program stored in a memory.
8. A computer-readable storage medium storing computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-3.
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| CN106688190A (en) * | 2015-09-03 | 2017-05-17 | Lg电子株式会社 | Method for reporting channel state information in wireless communication system and device therefor |
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| CN106685620B (en) * | 2015-11-06 | 2021-02-12 | 中兴通讯股份有限公司 | Configuration method and device, analysis method and device of channel state measurement pilot frequency |
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| CN106688190A (en) * | 2015-09-03 | 2017-05-17 | Lg电子株式会社 | Method for reporting channel state information in wireless communication system and device therefor |
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