CN114142980A - Reference signal transmission method and device - Google Patents

Reference signal transmission method and device Download PDF

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Publication number
CN114142980A
CN114142980A CN202111518145.7A CN202111518145A CN114142980A CN 114142980 A CN114142980 A CN 114142980A CN 202111518145 A CN202111518145 A CN 202111518145A CN 114142980 A CN114142980 A CN 114142980A
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reference signal
state information
channel state
csi
information reference
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CN114142980B (en
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李永
鲁照华
蒋创新
陈艺戬
李儒岳
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

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

Abstract

The invention provides a transmission method and a device of a reference signal, wherein the method comprises the following steps: a base station configures channel state information reference signal (CSI-RS) resource parameters for a terminal and sends the CSI-RS resource parameters to the terminal; and the base station sends the CSI-RS to the terminal according to the CSI-RS resource parameters, wherein the base station maps the CSI-RS on a time-frequency resource corresponding to the CSI-RS port index number according to the CSI-RS port index number and transmits the CSI-RS. By adopting the technical scheme, the problem of high misselection probability of the pre-coding vector caused by CSI-RS measurement errors in the related technology is solved, the terminal is ensured to detect the CSI-RS according to the resource parameters issued by the base station, the transmission stability is improved, and the misselection probability is greatly reduced.

Description

Reference signal transmission method and device
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for transmitting a reference signal.
Background
In the related art, with the rapid development of wireless communication demands in life and production, the fourth generation Long Term Evolution (LTE), the LTE-Advanced (LTE-a), and the fifth generation New Radio Access Technology (NR, New RAT) schemes all use Orthogonal Frequency Division Multiplexing (OFDM) modulation based technologies. In a communication system based on the OFDM technology, an OFDM symbol is the minimum unit of a transmission signal on a time domain, a plurality of OFDM symbols form a Slot (Slot), and the Slot is taken as the minimum scheduling unit of the time domain; the plurality of slots form a Frame (Frame) which is used as the minimum time unit of the upper layer signaling configuration. In LTE/LTE-a, one Subframe (Subframe) is composed of two slots, and one Subframe is used as the minimum scheduling unit. In the OFDM modulation technique, there are a plurality of subcarriers (subcarriers), and one Subcarrier is a unit of a minimum transmission signal in a frequency domain. In the Slot, a grid is formed by OFDM symbols in the time domain and Subcarrier in the frequency domain, and one Element in the grid, namely a cross point of one OFDM symbol in the time domain and one Subcarrier in the frequency domain, is one Resource Element (RE), which is the minimum unit of a transmission signal. For convenience of using frequency domain resources, a frequency domain Subcarrier is divided into a plurality of Resource Blocks (RBs), where an RB is composed of a plurality of continuous subcarriers, and may be an RB on one OFDM symbol, an RB on one Slot, or a single frequency domain Resource. To facilitate defining the use of resources by some functions, the REs are also typically divided into Resource Element groups (RE groups), one RE Group consisting of multiple REs, e.g., an RE Group defined for the control channel use resources. The maximum bandwidth which can be supported by a single carrier in LTE/LTE-A is 20MHz, the maximum Subcarrier interval is 15kHz, the frequency band of the carrier is usually below 6GHz, the maximum bandwidth which can be supported by an NR single carrier exceeds 100MHz, the maximum Subcarrier interval reaches 480kHz, the frequency band of the carrier can be below 6GHz or above 6GHz, and the maximum throughput and the spectral efficiency are both greatly improved compared with that of the LTE/LTE-A.
In a wireless communication system, a Channel is generally estimated using a Reference Signal (RS), for example, using a Channel-State Information Reference Signal (CSI-RS) to obtain Channel State Information as Reference Information for a scheduling operation; the channel coefficients are estimated, for example, using a Demodulation Reference Signal (DMRS) to demodulate data. DMRSs to 8 ports are supported in an LTE/LTE-a system, and they are distributed over fixed OFDM symbols and fixed subcarriers in a Subframe, that is, over fixed-location REs. There are two kinds of DMRSs at positions in the NR system, one is a Front demodulation reference signal (Front DMRS), which can use up to 2 OFDM symbols, and the position and density in the frequency domain can vary, and whether the second OFDM symbol is used can also vary; the other is an Additional demodulation reference signal (Additional DMRS), which may also use up to 2 OFDM symbols, and the position and density in the frequency domain may vary, and whether to use the Additional DMRS and the Additional DMRS uses 1 OFDM symbol or 2 OFDM symbols may also vary. In a wireless communication system based on the OFDM technology, during CSI-RS transmission, CSI-RS signals of multiple ports commonly share a same Group of REs in a Code Division Multiplexing (Code Division Multiplexing) manner, and such a Group of REs is called a CDM RE Group. The downlink Control information DCI (downlink Control information) is usually transmitted in a downlink Control information Format (DCI Format) to quickly transmit signaling, for example, signaling of a physical layer.
The NR communication technology has 4 OFDM symbols in a Slot for DMRS transmission, wherein a front DMRS can use two OFDM symbols, and an additional DMRS can use two OFDM symbols; and the density of DMRS in frequency may vary from Slot to Slot; and the CSI-RS is pre-configured through upper layer signaling. On one hand, if the CSI-RS uses OFDM symbols for transmitting the DMRS, the problem that the DMRS collides with the CSI-RS exists, namely the DMRS is transmitted on the same resource and interferes with each other; on the other hand, a large number of channel measurement requirements exist in the NR communication technology, and correspondingly, a large number of CSI-RS transmission requirements exist, so that a large number of OFDM symbols are required, and if OFDM symbols used by DMRSs are not used, the requirements for transmitting CSI-RS are influenced and satisfied; therefore, the technical problem to be solved is to utilize the OFDM symbol for transmitting the DMRS for transmitting the CSI-RS without colliding with the DMRS.
The receiving end obtains the antenna port channel coefficient of the sending end through the measurement of the CSI-RS, and selects a code word or a precoding matrix from the codebook according to the channel coefficient among the ports to feed back to the sending end as a reference for the sending end to adopt precoding. The precoding vectors in the precoding matrix are a combination of the 2D-DFT beam vectors and the polarization phases, i.e. vectors of the polarization dimensions. The essence of the precoding matrix selection at the receiving end is to select a 2D-DFT beam vector and a polarization vector, which is essentially to select a two-dimensional beam vector and a polarization vector. And misselecting the vector of any dimension leads to misselecting the pre-coding vector, thereby leading to misselecting the pre-coding matrix. When the channel coefficient measurement phase error between any dimensionality port is larger than half of the corresponding dimensionality vector granularity, vector misselection of the corresponding dimensionality is caused; and the larger the ratio of the channel coefficient measurement phase error of the dimension to the corresponding dimension vector granularity is, the larger the probability of the corresponding dimension error selection is. While the multi-port CSI-RS is usually transmitted on multiple REs, there is a difference between the channel coefficient phases between different REs, which may result in channel coefficient measurement errors between ports transmitted on different REs or RE groups. The channel coefficient difference between frequency domains is usually caused by multipath time delay, and the channel coefficient difference between time domains is usually caused by frequency offset and doppler; at high frequencies, phase noise also causes channel coefficient differences between time domains, and the higher the frequency, the more significant the phase noise impact. Therefore, the technical problem to be solved is to reduce the probability of misselection of the precoding vector caused by the measurement error of the CSI-RS.
The multiple ports of the CSI-RS are subjected to code division multiplexing on a frequency domain, and occupy multiple REs in one RB of the same OFDM symbol, or the CSI-RS of one port is transmitted by using the multiple REs in one RB of the same OFDM symbol, so that the interference can be enhanced while the signal is enhanced. The technical problem to be solved is to attenuate the interference generated thereby.
In summary, the following technical problems brought by the CSI-RS transmission process need to be solved: the OFDM symbols for transmitting the DMRS are used for transmitting the CSI-RS and do not collide with the DMRS; the misselection probability of the pre-coding vector caused by the CSI-RS measurement error is reduced; and weakening the interference of the CSI-RS to the CSI-RS.
Namely, the related technical scheme has the following defects:
in the LTE technology, the CSI-RS and the DMRS are transmitted by using OFDM symbols for transmitting the DMRS, wherein the CSI-RS and the DMRS are respectively transmitted by using different REs. In LTE, DMRS can be transmitted because REs to transmit are fixed; however, in the NR technique, REs for transmitting DMRSs are varied, and a scheme of using different REs on the same OFDM symbol respectively cannot solve the problem that the CSI-RS and the DMRS in NR use the same OFDM symbol.
In the related technical scheme, a transmission power scheme of the CSI-RS is increased, and the scheme for reducing the interference can only reduce the measurement error caused by the interference; but cannot reduce the measurement error between the antenna port channel coefficients due to the channel variation itself; measurement errors caused by phase noise cannot be reduced; the scheme using the phase tracking reference signal increases the overhead of the reference signal, and the more the density of the phase tracking reference signal, the more overhead.
The CSI-RS sequence uses a pseudo-random sequence scheme with the length larger than 2 in one RB of the same OFDM symbol, so that the length of the CSI-RS in one OFDM symbol is increased, and the storage overhead of both transmission parties is increased.
Aiming at the problem of high probability of error selection of a pre-coding vector caused by CSI-RS measurement errors in the related art, no effective solution exists at present.
Disclosure of Invention
The embodiment of the invention provides a transmission method and device of a reference signal, a base station and a terminal, which at least solve the problem of high probability of misselection of a pre-coding vector caused by CSI-RS measurement errors in the related art.
According to an embodiment of the present invention, there is provided a method for transmitting a reference signal, including: the first communication node configures channel state information reference signal (CSI-RS) resource parameters for the second communication node and sends the CSI-RS resource parameters to the second communication node; and the first communication node sends the CSI-RS to the second communication node according to the CSI-RS resource parameters, wherein the first communication node maps the CSI-RS on a time-frequency resource corresponding to the CSI-RS port index number according to the CSI-RS port index number and transmits the CSI-RS.
Optionally, the first communication node determines the index number of the CSI-RS port according to a code division multiplexing resource Group, CDM RE Group index number.
Optionally, the CSI-RS port index number increases as an index number of the CDM RE Group increases.
Optionally, the CSI-RS port index number is determined by the following formula: p '+ iL, where p is the index number of the CSI-RS port, p' is the index number of the port in the CDM Group of the code division multiplexing Group in which the CSI-RS is located before transmission, L is the number of ports included in the CDM Group, and i is the index number of the CDM Group.
Optionally, the first communication node determines the CDM RE Group index number according to frequency domain frequency of the CDM RE Group.
Optionally, the first communication node determines the CDM RE Group index number in dependence on one of: the frequency domain frequency of the CDM RE Group and the time domain sequence of the CDM RE Group.
Optionally, the first communication node determines the CDM RE Group index number in terms of frequency domain frequency of the CDM RE Group within the same Group of OFDM symbols; and determining the CDM RE Group index number according to the time domain sequence of the CDM RE Group among different groups of OFDM symbols.
Optionally, the first communication node determines the index number of the CSI-RS port according to a resource Group RE Group location where the port corresponding to the CSI-RS is located.
Optionally, in the same OFDM symbol, the first communication node determines the index number of the CSI-RS port according to the RE Group frequency domain frequency where the port is located; and among different OFDM symbols, the first communication node determines the index number of the CSI-RS port according to the RE Group time domain sequence of the port.
Optionally, one CDM RE Group includes one or more RE groups, and the first communication node determines, according to a port index number of the RE Group, a port index number mapped on the CDM RE Group.
Optionally, the CSI-RS and the DMRS transmitted by the first communication node are both time-division multiplexed with the same OFDM symbol.
Optionally, the first communication node transmits downlink control information DCI in a downlink control information Format DCI Format, where the downlink control information DCI indicates a time division multiplexing transmission condition of the CSI-RS and the DMRS on the OFDM symbol.
Optionally, one field in the DCI Format is used to indicate the CSI-RS and the DMRS are transmitted on the OFDM symbol simultaneously.
Optionally, one field in the DCI Format is used to indicate the transmission of the DMRS on the symbol, and the one field and another field in the DCI Format jointly indicate the transmission of the CSI-RS on the OFDM symbol.
Optionally, the OFDM symbol includes at least one of: the second OFDM symbol of the front demodulation reference signal front DMRS, and the symbol of the additional demodulation reference signal additional DMRS.
Optionally, the first communication node indicates, by the category of the CSI-RS, a range of time domain OFDM symbols used when the first communication node performs data transmission.
Optionally, the first communication node maps the CSI-RS on a time-frequency resource corresponding to a CSI-RS port index according to the CSI-RS port index for transmission, and further includes: the first communication node multiplying an element in a CSI-RS sequence of the CSI-RS by an element in a mask sequence; and transmitting the multiplied CSI-RS sequence on the time frequency resource.
Optionally, all resource blocks RB of the predetermined bandwidth range use the same mask sequence on the same OFDM symbol.
Optionally, the mask sequence is a subsequence of a preset length in the CSI-RS sequence on the same OFDM symbol.
Optionally, on the same OFDM symbol, the first communication node determines the mask sequence according to an index number of an RB.
Optionally, the mask sequence is a subsequence of a preset length in a CSI-RS sequence on the same OFDM symbol, and the subsequence is determined by the index number of the RB.
Optionally, the first communication node configures a mask sequence for the second communication node.
According to another embodiment of the present invention, there is also provided a method for transmitting a reference signal, including: a second communication node receives a channel state information reference signal resource parameter sent by a first communication node; and the second communication node receives the CSI-RS sent by the first communication node according to the channel state information reference signal resource parameter, wherein the CSI-RS is received on a time frequency resource corresponding to a CSI-RS port index number of the channel state information reference signal.
Optionally, the CSI-RS port index is determined by the second communication node according to a code division multiplexing resource Group, CDM RE Group index.
Optionally, the CSI-RS port index number increases as an index number of the CDM RE Group increases.
Optionally, the CSI-RS port index number is determined by the following formula:
p '+ iL, where p is the index number of the CSI-RS port, p' is the index number of the port in the CDM Group of the code division multiplexing Group where the CSI-RS is located before transmission, L is the number of ports included in the CDM Group, and i is the index number of the CDM Group.
Optionally, the CDM RE Group index is determined by the second communication node according to frequency domain frequency of the CDM RE Group.
Optionally, the CDM RE Group index is determined by the second communications node based on one of: the frequency domain frequency of the CDM RE Group and the time domain sequence of the CDM RE Group.
Optionally, determining, by the second communication node, the CDM RE Group index number by the frequency domain frequency of the CDM RE Group within the same Group of OFDM symbols; and determining the CDM RE Group index number by the second communication node according to the time domain sequence of the CDM RE Group among different groups of OFDM symbols.
Optionally, the CSI-RS port index number is determined by the second communication node according to a resource Group RE Group location where a port corresponding to the CSI-RS is located.
Optionally, in the same OFDM symbol, the second communication node determines the CSI-RS port index number according to the RE Group frequency domain frequency where the port is located; and determining the index number of the CSI-RS port by the first communication node according to the sequence of the RE Group time domain where the port is located among different OFDM symbols.
Optionally, one CDM RE Group includes one or more RE groups, and the port index number mapped on the CDM RE Group is determined by the second communication node according to the port index number of the RE Group.
Optionally, the CSI-RS and the DMRS transmitted by the first communication node are both time-division multiplexed with the same OFDM symbol.
Optionally, receiving downlink control information DCI sent by the first communication node through a downlink control information Format DCI Format, where the first communication node indicates, through the DCI, a time-division multiplexing transmission condition of the CSI-RS and the DMRS on the OFDM symbol.
Optionally, one field in the DCI Format is used to indicate the CSI-RS and the DMRS are transmitted on the OFDM symbol simultaneously.
Optionally, one field in the DCI Format is used to indicate the transmission of the DMRS on the symbol, and the one field and another field in the DCI Format jointly indicate the transmission of the CSI-RS on the OFDM symbol.
Optionally, the OFDM symbol includes at least one of: the second OFDM symbol of the front demodulation reference signal front DMRS, and the symbol of the additional demodulation reference signal additional DMRS.
Optionally, the range of the time domain OFDM symbol used by the first communication node for data transmission is determined according to the category of the CSI-RS sent by the first communication node.
Optionally, receiving the CSI-RS on a time-frequency resource corresponding to a CSI-RS port index number of the CSI-RS, further includes: the first communication node multiplying an element in a CSI-RS sequence of the CSI-RS by an element in a mask sequence; and transmitting the multiplied CSI-RS sequence on the time frequency resource.
Optionally, all resource blocks RB of the predetermined bandwidth range use the same mask sequence on the same OFDM symbol.
Optionally, the mask sequence is a subsequence of a preset length in the CSI-RS sequence on the same OFDM symbol.
Optionally, the mask sequence is determined by the first communication node according to an index number of an RB on the same OFDM symbol.
Optionally, the mask sequence is a subsequence of a preset length in a CSI-RS sequence on the same OFDM symbol, and the subsequence is determined by the index number of the RB.
Optionally, the masking sequence is configured by the first communication node for a second communication node.
According to another embodiment of the present invention, there is also provided a reference signal transmission apparatus, applied to a first communication node, including: the configuration module is used for configuring channel state information reference signal (CSI-RS) resource parameters for the second communication node and sending the CSI-RS resource parameters to the second communication node; and the sending module is used for sending the CSI-RS to the second communication node according to the CSI-RS resource parameters, wherein the sending module maps the CSI-RS on a time-frequency resource corresponding to the CSI-RS port index number according to the CSI-RS port index number and transmits the CSI-RS.
According to another embodiment of the present invention, there is provided an apparatus for transmitting a reference signal, applied to a second communication node, including: a first receiving module, configured to receive a channel state information reference signal resource parameter sent by a first communication node; and the second receiving module is used for receiving the CSI-RS sent by the first communication node according to the channel state information reference signal resource parameters, wherein the CSI-RS is received on the time-frequency resource corresponding to the CSI-RS port index number of the channel state information reference signal.
There is also provided, in accordance with another embodiment of the present invention, a first communication node, including: the first processor is used for configuring channel state information reference signal (CSI-RS) resource parameters for the second communication node and mapping the CSI-RS on time-frequency resources corresponding to the CSI-RS port index numbers according to the CSI-RS port index numbers; and the first communication device is used for sending the channel state information reference signal resource parameter to a second communication node and sending the CSI-RS to the second communication node on the time-frequency resource according to the CSI-RS resource parameter.
There is also provided, in accordance with another embodiment of the present invention, a second communications node, including: the second communication device is used for receiving the channel state information reference signal resource parameter sent by the first communication node; and the second processor is used for receiving the CSI-RS sent by the first communication node according to the channel state information reference signal resource parameter, wherein the processor receives the CSI-RS on a time-frequency resource corresponding to a CSI-RS port index number of the channel state information reference signal through the second communication device.
According to another embodiment of the present invention, there is also provided a storage medium including a stored program, wherein the program is operable to perform the method of any of the above-mentioned alternative embodiments.
According to another embodiment of the present invention, there is further provided a processor, wherein the processor is configured to execute a program, and wherein the program executes to perform the method according to any one of the above-mentioned alternative embodiments.
According to the invention, a base station configures channel state information reference signal (CSI-RS) resource parameters for a terminal and sends the CSI-RS resource parameters to the terminal; and the base station sends the CSI-RS to the terminal according to the CSI-RS resource parameters, wherein the base station maps the CSI-RS on a time-frequency resource corresponding to the CSI-RS port index number according to the CSI-RS port index number and transmits the CSI-RS. By adopting the technical scheme, the problem of high misselection probability of the pre-coding vector caused by CSI-RS measurement errors in the related technology is solved, the terminal is ensured to detect the CSI-RS according to the resource parameters issued by the base station, the transmission stability is improved, and the misselection probability is greatly reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present invention.
Detailed Description
The embodiment of the application provides a mobile communication network (including but not limited to a 5G mobile communication network), and the network architecture of the network can comprise a network side device (such as a base station) and a terminal. In this embodiment, an information transmission method capable of operating on the network architecture is provided, and it should be noted that an operating environment of the information transmission method provided in this embodiment is not limited to the network architecture.
It should be added that, in this document, the first communication node may be a base station side device, the second communication node may be a terminal side device, and of course, the first communication node may also be a terminal side device, that is, two communication nodes are device-to-device communication.
Example one
In this embodiment, a method for transmitting a reference signal operating in the above base station is provided, and fig. 1 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:
step S102, a base station configures a channel state information reference signal (CSI-RS) resource parameter for a terminal and sends the CSI-RI resource parameter to the terminal;
and step S104, the base station sends the CSI-RS to the terminal according to the CSI-RS resource parameters, wherein the base station maps the CSI-RS on a time-frequency resource corresponding to the CSI-RS port index number according to the CSI-RS port index number and transmits the CSI-RS.
Through the steps, the base station configures the CSI-RS resource parameter for the terminal and sends the CSI-RI resource parameter to the terminal; and the base station sends the CSI-RS to the terminal according to the CSI-RS resource parameters, wherein the base station maps the CSI-RS on a time-frequency resource corresponding to the CSI-RS port index number according to the CSI-RS port index number and transmits the CSI-RS. By adopting the technical scheme, the problem of high misselection probability of the pre-coding vector caused by CSI-RS measurement errors in the related technology is solved, the terminal is ensured to detect the CSI-RS according to the resource parameters issued by the base station, the transmission stability is improved, and the misselection probability is greatly reduced.
Alternatively, the main body of the above steps may be a base station, etc., but is not limited thereto.
Optionally, the base station determines the index number of the CSI-RS port according to a code division multiplexing resource Group CDM RE Group index number.
Optionally, the CSI-RS port index number increases as the index number of the CDM RE Group increases.
Optionally, the CSI-RS port index number is determined by the following formula: p '+ iL, where p is the index number of the CSI-RS port, p' is the index number of the port in the CDM Group of the code division multiplexing Group where the CSI-RS is located before transmission, L is the number of ports included in the CDM Group, and i is the index number of the CDM Group.
Optionally, the base station determines the CDM RE Group index according to the frequency domain frequency of the CDM RE Group.
Optionally, the base station determines the CDM RE Group index according to one of the following information: the frequency domain frequency of the CDM RE Group and the time domain sequence of the CDM RE Group.
Optionally, the base station determines the CDM RE Group index number according to the frequency domain frequency of the CDM RE Group within the same Group of OFDM symbols; and determining the CDM RE Group index number among different groups of OFDM symbols according to the time domain sequence of the CDM RE Group.
Optionally, the base station determines the index number of the CSI-RS port according to the Group location of the resource Group RE where the port corresponding to the CSI-RS is located.
Optionally, in the same OFDM symbol, the base station determines the index number of the CSI-RS port according to the RE Group frequency domain frequency where the port is located; and among different OFDM symbols, the base station determines the index number of the CSI-RS port according to the sequence of the RE Group time domain where the port is located.
Optionally, one CDM RE Group includes one or more RE groups, and the base station determines the port index numbers mapped on the CDM RE Group according to the port index numbers of the RE groups.
Optionally, the CSI-RS and the DMRS transmitted by the base station are both time-division multiplexed with the same OFDM symbol.
Optionally, the base station sends downlink control information DCI in a downlink control information Format DCI Format, where the downlink control information DCI indicates a time division multiplexing sending situation of the CSI-RS and the DMRS on the OFDM symbol.
Optionally, one field in the DCI Format is used to indicate the transmission condition of the CSI-RS and the DMRS on the OFDM symbol simultaneously.
Optionally, one field in the DCI Format is used to indicate a transmission condition of the DMRS on the symbol, and the one field and another field in the DCI Format jointly indicate a transmission condition of the CSI-RS on the OFDM symbol.
Optionally, the OFDM symbol includes at least one of: the second OFDM symbol of the front demodulation reference signal front DMRS, and the symbol of the additional demodulation reference signal additional DMRS.
Optionally, the base station indicates, by the category of the CSI-RS, a range of time domain OFDM symbols used when the base station performs data transmission.
Optionally, the base station maps the CSI-RS on the time-frequency resource corresponding to the CSI-RS port index according to the CSI-RS port index for transmission, and further includes: the base station multiplies elements in a CSI-RS sequence of the CSI-RS by elements in a mask sequence; and transmitting the multiplied CSI-RS sequence on the time frequency resource.
Optionally, all resource blocks RB of the predetermined bandwidth range use the same mask sequence on the same OFDM symbol.
Optionally, the mask sequence is a subsequence of a preset length in the CSI-RS sequence on the same OFDM symbol.
Optionally, on the same OFDM symbol, the base station determines the mask sequence according to the index number of the RB.
Optionally, the mask sequence is a subsequence of a preset length in the CSI-RS sequence on the same OFDM symbol, and the subsequence is determined by the index number of the RB.
Optionally, the base station configures a mask sequence for the terminal.
According to another embodiment of the present invention, there is also provided a method for transmitting a reference signal, including the steps of:
a terminal receives a CSI-RI resource parameter sent by a base station;
and step two, the terminal receives the CSI-RS sent by the base station according to the CSI-RI resource parameters, wherein the CSI-RS is received on the time-frequency resource corresponding to the CSI-RS port index number of the CSI-RI.
Optionally, the CSI-RS port index is determined by the terminal according to a code division multiplexing resource Group, CDM RE Group index.
Optionally, the CSI-RS port index number increases as the index number of the CDM RE Group increases.
Optionally, the CSI-RS port index number is determined by the following formula: p '+ iL, where p is the index number of the CSI-RS port, p' is the index number of the port in the CDM Group of the code division multiplexing Group where the CSI-RS is located before transmission, L is the number of ports included in the CDM Group, and i is the index number of the CDM Group.
Optionally, the CDM RE Group index is determined by the terminal according to the frequency domain frequency of the CDM RE Group.
Optionally, the CDM RE Group index is determined by the terminal according to one of the following information: the frequency domain frequency of the CDM RE Group and the time domain sequence of the CDM RE Group.
Optionally, the CDM RE Group index is determined by the terminal according to the frequency domain frequency of the CDM RE Group within the same Group of OFDM symbols; and determining the CDM RE Group index number by the terminal according to the time domain sequence of the CDM RE Group among different groups of OFDM symbols.
Optionally, the index number of the CSI-RS port is determined by the terminal according to the location of the resource Group RE Group where the port corresponding to the CSI-RS is located.
Optionally, in the same OFDM symbol, the terminal determines the index number of the CSI-RS port according to the RE Group frequency domain frequency where the port is located; and determining the index number of the CSI-RS port by the base station according to the sequence of the RE Group time domain where the port is located among different OFDM symbols.
Optionally, one CDM RE Group includes one or more RE groups, and the port index number mapped on the CDM RE Group is determined by the terminal according to the port index number of the RE Group.
Optionally, the CSI-RS and the DMRS transmitted by the base station are both time-division multiplexed with the same OFDM symbol.
Optionally, receiving downlink control information DCI sent by the base station through a downlink control information Format DCI Format, where the base station indicates, through the DCI, a time division multiplexing transmission condition of the CSI-RS and the DMRS on the OFDM symbol.
Optionally, one field in the DCI Format is used to indicate the transmission condition of the CSI-RS and the DMRS on the OFDM symbol simultaneously.
Optionally, one field in the DCI Format is used to indicate a transmission condition of the DMRS on the symbol, and the one field and another field in the DCI Format jointly indicate a transmission condition of the CSI-RS on the OFDM symbol.
Optionally, the OFDM symbol includes at least one of: the second OFDM symbol of the front demodulation reference signal front DMRS, and the symbol of the additional demodulation reference signal additional DMRS.
Optionally, the range of the time domain OFDM symbol used by the base station for data transmission is determined according to the type of the CSI-RS sent by the base station.
Optionally, receiving the CSI-RS on a time-frequency resource corresponding to the CSI-RS port index number of the CSI-RS, further includes: the base station multiplies elements in a CSI-RS sequence of the CSI-RS by elements in a mask sequence; and transmitting the multiplied CSI-RS sequence on the time frequency resource.
Optionally, all resource blocks RB of the predetermined bandwidth range use the same mask sequence on the same OFDM symbol.
Optionally, the mask sequence is a subsequence of a preset length in the CSI-RS sequence on the same OFDM symbol.
Optionally, the mask sequence is determined by the base station according to the index number of the RB on the same OFDM symbol.
Optionally, the mask sequence is a subsequence of a preset length in the CSI-RS sequence on the same OFDM symbol, and the subsequence is determined by the index number of the RB.
Optionally, the mask sequence is configured by the base station for the terminal.
The following detailed description is given with reference to preferred embodiments of the present invention.
The preferred embodiment of the invention provides a method for transmitting reference signals, which comprises the following steps: configuring a CSI-RS resource parameter, transmitting the configured CSI-RS resource parameter, and transmitting the CSI-RS according to the CSI-RS resource parameter, wherein the CSI-RS is mapped on a time frequency resource for transmission according to a port index number;
for example, the base station configures CSI-RS resource parameters, transmits the configured CSI-RS resource parameters, and transmits the CSI-RS according to the CSI-RS resource parameters, wherein the CSI-RS is mapped on time-frequency resources for transmission according to port index numbers;
for example, the base station configures CSI-RS resource parameters, transmits the configured CSI-RS resource parameters, and the terminal transmits the CSI-RS according to the CSI-RS resource parameters, wherein the CSI-RS is mapped on time-frequency resources for transmission according to port index numbers;
for example, the CSI-RS resource parameters include: number of ports of CSI-RS
For example, the CSI-RS resource parameters include: the length of the port code division multiplexing of the CSI-RS, namely the length of an orthogonal sequence used by code division multiplexing among ports;
for example, the CSI-RS resource parameters include: categories of port code division multiplexing for CSI-RS
For example, the CSI-RS resource parameters include: number of OFDM symbols used by CSI-RS
For example, the CSI-RS resource parameters include: position or index number of OFDM symbol used by CSI-RS
For example, the CSI-RS resource parameters include: index number of OFDM symbol used by CSI-RS
For example, the CSI-RS resource parameters include: classes of components aggregating CSI-RS RE patterns
For example, the CSI-RS resource parameters include: aggregating the locations of components of CSI-RS RE patterns
For example, the CSI-RS resource parameters include: aggregating index numbers of components of CSI-RS RE patterns
For example, the CSI-RS resource parameters include: power parameter
Alternative embodiment 1 wherein the port index number of the CSI-RS is determined by a CDM RE Group index number;
for example: and the CSI-RS is mapped on the time-frequency resource for transmission according to the port index number, and the port index number of the CSI-RS is reduced according to the increase of the index number of the CDM RE Group.
Optional embodiment 1-1, the CSI-RS is mapped on the time-frequency resource for transmission according to the port index number, the port index number of the CSI-RS is increased by the index number of the CDM RE Group;
for example: p ═ P' -P0)·K+i+P0P is the index number of the port to be sent, p' is the index number of the port in CDM Group before sending, and i is the index number of CDM Group; k is the CDM Group number; is the port start number of the CSI-RS;
for example: when P' < P0When + L/2, p ═ p' + iL/2; when P' > P0When + L/2, p ═ p' + iL/2+ N/2; p is the index number of the port to be sent, p' is the index number of the port in CDM Group before sending, and i is the index number of the CDM Group; n is the number of ports; l is CDM GThe number of ports included in the roup, which is also the length of the CDM; is the port start number of the CSI-RS.
Alternative embodiment 1-1-1 where p ═ p '+ iL, p is the port index number sent, p' is the port index number in the CDM Group before sending, L is the number of ports included in the CDM Group, and is also the length of the CDM; i is the index number of the CDM Group.
Alternative embodiments 1-2: the CSI-RS is mapped on the time frequency resource for transmission according to the port index number, the port index number of the CSI-RS is determined by the CDM RE Group index number, and the CDM RE Group index number is determined according to the frequency domain frequency
For example: the CDM Group index number with high frequency is small, and the CDM Group index number with low frequency is large;
for example: the CDM Group index number with high frequency is high, and the CDM Group index number with low frequency is small.
Alternative examples 1-2-1: determining a CDM RE Group index number according to the frequency domain and the time domain;
for example: the CDM Group index number with high frequency is small, the CDM Group index number with low frequency is large, the CDM Group index number which is early in the time domain is small, and the CDM Group index number which is later in the time domain is large;
for example: the CDM Group index number with high frequency is high, and the CDM Group index number with low frequency is small; the CDM Group index number in the early time domain is small, and the CDM Group index number in the later time domain is large.
Alternative examples 1-2-1-1: CDM RE Group index numbers are determined in the same Group of OFDM symbols according to frequency domain frequency, and different groups are determined in sequence according to time domain;
for example: in the same Group of OFDM symbols, the CDM Group index number with high frequency is small, and the CDM Group index number with low frequency is large; in different groups of OFDM symbols, the CDM Group index number which is early in the time domain is small, and the CDM Group index number which is late in the time domain is large;
for example: in the same Group of OFDM symbols, the CDM Group index number with high frequency is high, and the CDM Group index number with low frequency is small; in different groups of OFDM symbols, the CDM Group index number in the early time domain is small, and the CDM Group index number in the later time domain is large.
Alternative embodiment 2: the index number of the CSI-RS port is determined by the position of the RE Group where the corresponding port is located
For example: the index number of the CSI-RS port is determined by the height of the RE Group frequency domain;
for example: and the index number of the CSI-RS port is determined by the time domain of the RE Group where the CSI-RS port is located.
Optional embodiment 2-1, in the same OFDM symbol, the index number of the CSI-RS port is determined by the frequency domain of the RE Group in which the index number is located; and between different OFDM symbols, the index number of the CSI-RS port is determined by the time domain of the RE Group where the CSI-RS port is located.
For example: in the same OFDM symbol, the index number of the port corresponding to the RE Group with high frequency is small, and the index number of the port corresponding to the RE Group with low frequency is large; among different OFDM symbols, the port index number corresponding to the RE Group which is earlier in the time domain is small, and the port index number corresponding to the RE Group which is later in the time domain is large;
for example: in the same OFDM symbol, the index number of the port corresponding to the RE Group with high frequency is high, and the index number of the port corresponding to the RE Group with low frequency is small; among different OFDM symbols, the port index number corresponding to the RE Group which is earlier in time domain is small, and the port index number corresponding to the RE Group which is later in time domain is large.
Alternative embodiment 2-2: the CDM RE Group includes an RE Group, and the port index number mapped on the CDM RE Group is determined by the port index number of the RE Group.
For example: CDM RE Group includes 2 RE groups, the port index number of the first RE Group is { p0,0,p0,1The port index number of the second RE Group is { p }1,0,p1,1Determining the port index number of CDM RE Group as { p }according to the port index numbers of the two RE groups0,0,p0,1,p1,0,p1,1}
For example: CDM RE Group comprises 2 RE groups, the index number of the first RE Group is k0Corresponding port index number is { p }0,p1The index number of the second RE Group is k1Corresponding port index number is { p }0,p1Determining the port index number of the CDM RE Group as {2 k } according to the port index numbers of the two RE groups0+p0,0,2·k0+p0,1,2·k1p1,0,2·k1p1,1}。
Alternative embodiment 3: time division multiplexing OFDM symbol with same CSI-RS and DMRS
For example, the CSI-RS and the DMRS respectively use OFDM symbols at the same position on different slots, or OFDM symbols with the same index number; the Slot is a time domain transmission unit formed by a plurality of OFDM symbols;
or the CSI-RS and the DMRS respectively use OFDM symbols at the same position or the same index number on different frames; the Frame is a time domain transmission unit formed by a plurality of slots.
Alternative embodiment 3-1: indicating, by the DCI, for a time division multiplexing transmission case of the CSI-RS and the DMRS on the OFDM symbol.
For example: one field in the DCI Format indicates the transmission condition of the DMRS on the symbol, and the other field in the DCI Format indicates the transmission condition of the CSI-RS on the OFDM symbol.
Alternative examples 3-1-1: one domain in the DCI Format simultaneously indicates the transmission condition of the CSI-RS and the DMRS on the OFDM symbol;
for example, the state of a bit string formed by all bits in one domain or the state indication of the formed numerical value simultaneously indicates the transmission condition of the CSI-RS and the DMRS on the OFDM symbol
For example: the state of bit string formed by partial bits in one domain or the state indication of the formed numerical value simultaneously indicates the transmission condition of CSI-RS and DMRS on the OFDM symbol
For example: the state of a bit string formed by partial bits in one domain or the state of a formed numerical value is adopted to indicate the transmission condition of the DMRS on the OFDM symbol at the same time; and the state of a bit string formed by the other part of bits in one domain or the state of a formed numerical value is adopted to indicate the transmission condition of the CSI-RS on the OFDM symbol.
Alternative examples 3-1-2: one field in the DCI Format indicates the transmission condition of the DMRS on the symbol, and the field and the other field in the DCI Format jointly indicate the transmission condition of the CSI-RS on the OFDM symbol.
For example: one domain of the DCI Format indicates that the DMRS is sent on the symbol, the other domain of the DCI Format indicates that the CSI-RS is sent on the same symbol at the same time, and finally the two domains jointly determine and indicate that the CSI-RS is not sent;
for example: one domain of the DCI Format indicates that the DMRS is sent on the symbol, the other domain of the DCI Format indicates that the CSI-RS is not sent on the same symbol, and finally the two domains jointly determine and indicate that the CSI-RS is not sent;
for example: one domain of the DCI Format indicates that the DMRS is not transmitted on the symbol, the other domain of the DCI Format indicates that the CSI-RS is transmitted on the same symbol, and finally the two domains jointly determine and indicate that the CSI-RS is transmitted on the symbol;
for example: one domain of the DCI Format indicates that the DMRS is not transmitted on the symbol, the other domain of the DCI Format indicates that the CSI-RS is not transmitted on the same symbol, and finally the two domains jointly determine and indicate that the CSI-RS is not transmitted on the symbol.
Alternative embodiment 3-2: the OFDM symbol includes at least one of: the second OFDM symbol for front DMRS, the symbol for additional DMRS.
For example: a first OFDM symbol of an additional DMRS;
for example: a second OFDM symbol of the additional DMRS;
for example: a first OFDM symbol of the additional DMRS and a second OFDM symbol of the additional DMRS.
Alternative embodiments 3 to 3: the CSI-RS is of an aperiodic type.
For example: the CSI-RS is sent once only by the triggering of the physical layer signaling;
for example: triggered by Mac-CE signaling, the CSI-RS is transmitted once.
Alternative embodiment 4: the category of the CSI-RS indicates a range of time domain OFDM symbols transmitted by the CSI-RS, for example, the category of the CSI-RS indicates a range of time domain OFDM symbols transmitted by the CSI-RS;
for example, the category of the CSI-RS indicates a time domain OFDM symbol range received by the CSI-RS;
for example, the category of periodic or semi-persistent CSI-RS indicates that the transmission time domain OFDM symbol range of the CSI-RS is, other than the following OFDM symbols: a first OFDM symbol of front DMRS, a second OFDM symbol of front DMRS, and an OFDM symbol of addtional DMRS;
for example, the category of aperiodic CSI-RS indicates that the transmission time domain OFDM symbol range of CSI-RS is other symbols than the following OFDM symbols: the first OFDM symbol of the front DMRS.
Alternative embodiment 5 mapping CSI-RS to REs, further comprising the operations of: multiplying the elements in the CSI-RS sequence by the elements in the mask sequence;
the mask sequence is a sequence with the length of L, L is the number of subcarriers of RB in a frequency domain, and elements in the mask correspond to REs in the frequency domain in the RB one to one; the element in the CSI-RS sequence multiplied by the element in the mask sequence refers to that each element in the CSI-RS sequence multiplied by the element in the mask sequence corresponding to its transmitting RE.
Alternative embodiment 5-1. all RBs of the predetermined bandwidth range use the same mask sequence on the same symbol;
for example, the predetermined bandwidth is a portion of the system bandwidth;
for example, the predetermined bandwidth is a system bandwidth;
for example, the predetermined bandwidth is a bandwidth of one carrier;
for example, the predetermined bandwidth is a portion of one carrier bandwidth;
for example, the predetermined bandwidth is a configured bandwidth.
Alternative embodiments 5-1-2, the mask sequence is a sub-sequence of length L in the CSI-RS sequence on the same symbol;
for example: a subsequence consisting of consecutive elements of length L starting with the r-th element in the CSI-RS sequence;
for example: a subsequence with the length of L and started by a first element in the CSI-RS sequence;
for example: a subsequence with the length of L and formed by the elements with the equal interval of M starting from the r-th element in the CSI-RS sequence;
for example: the starting element varies with the sequence number of the symbol.
Alternative embodiment 5-2. on the same symbol, the mask sequence is determined by the index number of the RB.
Alternative example 5-2-1: the mask sequence is a sub-sequence with the length of L in a CSI-RS sequence on the same symbol, and the sub-sequence is determined by the index number of RB;
for example: the subsequence is formed by continuous elements with the length of L in the CSI-RS sequence, the initial position is r, and the r is changed by the index number of RB;
for example: a subsequence with length L and formed by elements with interval M in a CSI-RS sequence; m is determined by the index number of RB;
for example: a subsequence with the length of L and formed by the elements with the equal interval of M starting from the r-th element in the CSI-RS sequence; r is determined by the index number of the RB;
optional embodiment 5-3, the mask sequence is configured for the terminal; for example: the mask sequence configures the terminal by upper layer signaling.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
Example two
In this embodiment, a reference signal transmission apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and the description of the apparatus is omitted for brevity. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
According to another embodiment of the present invention, there is provided an apparatus for transmitting a reference signal, which is applied to a base station, the apparatus including:
the configuration module is used for configuring channel state information reference signal (CSI-RS) resource parameters for the terminal and sending the CSI-RS resource parameters to the terminal;
and the sending module is connected to the configuration module and used for sending the CSI-RS to the terminal according to the CSI-RS resource parameters, wherein the sending module maps the CSI-RS on the time-frequency resource corresponding to the CSI-RS port index number according to the CSI-RS port index number and transmits the CSI-RS.
According to another embodiment of the present invention, there is provided an apparatus for transmitting a reference signal, which is applied to a terminal, and includes:
the first receiving module is used for receiving the channel state information reference signal resource parameters sent by the base station;
and the second receiving module is used for receiving the CSI-RS sent by the base station according to the channel state information reference signal resource parameters, wherein the CSI-RS is received on the time-frequency resource corresponding to the CSI-RS port index number of the channel state information reference signal.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
EXAMPLE III
According to another embodiment of the present invention, there is also provided a base station including:
the first processor is used for configuring channel state information reference signal (CSI-RS) resource parameters for a terminal and mapping the CSI-RS on time-frequency resources corresponding to the CSI-RS port index number according to the CSI-RS port index number;
and the first communication device is used for sending the channel state information reference signal resource parameters to a terminal and sending the CSI-RS to the terminal on the time-frequency resource according to the CSI-RS resource parameters.
According to another embodiment of the present invention, there is also provided a terminal including:
the second communication device is used for receiving the channel state information reference signal resource parameter sent by the base station;
and the second processor is used for receiving the CSI-RS sent by the base station according to the channel state information reference signal resource parameters, wherein the processor receives the CSI-RS on the time-frequency resource corresponding to the CSI-RS port index number of the channel state information reference signal through the second communication device.
Example four
According to another embodiment of the invention, a processor for running a program is provided, wherein the program when running performs the method as described in any of the above alternative embodiments.
EXAMPLE five
According to another embodiment of the present invention, there is also provided a storage medium including a stored program, wherein the program is operable to perform the method of any of the above-mentioned alternative embodiments.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (27)

1. A method for transmitting a reference signal, comprising:
the first communication node configures channel state information reference signal resource parameters for the second communication node and sends the channel state information reference signal resource parameters to the second communication node;
the first communication node sends the channel state information reference signal to the second communication node according to the channel state information reference signal resource parameter, wherein the first communication node maps the channel state information reference signal on a time-frequency resource corresponding to a channel state information reference signal port index number according to the channel state information reference signal port index number and transmits the channel state information reference signal; wherein the channel state information reference signal resource parameters include: the index number of the OFDM symbol used by the channel state information reference signal.
2. The method of claim 1, wherein the first communication node determines the csi-rs port index from a cdma resource group index.
3. The method of claim 2, comprising:
the channel state information reference signal port index number increases as the index number of the set of code division multiplexing resources increases.
4. The method of claim 1, wherein the csi-rs port index is determined by the following equation:
p '+ iL, where p is the port index of the csi-rs, p' is the port index of the cdma group where the csi-rs is located, L is the size of the cdma group, and i is the index of the cdma group.
5. The method of claim 2, wherein the first communication node determines the index number for the set of code division multiplexing resources according to frequency domain frequency of the set of code division multiplexing resources.
6. The method of claim 5, wherein the first communication node determines the index of code division multiplexing resource group based on one of: the frequency domain of the code division multiplexing resource group and the time domain sequence of the code division multiplexing resource group.
7. The method of claim 6, wherein the first communication node determines the index number for the set of code division multiplexing resources from frequency domain frequencies for the set of code division multiplexing resources within the same orthogonal frequency division multiplexing symbol; and determining the index number of the code division multiplexing resource group among different orthogonal frequency division multiplexing symbols according to the time domain sequence of the code division multiplexing resource group.
8. The method of claim 1, wherein the first communication node determines the port index of the csi-rs according to the resource group location where the port corresponding to the csi-rs is located.
9. The method of claim 8, wherein the first communication node determines the csi-rs port index according to the frequency of the resource group in which the port is located in the same ofdm symbol; and among different orthogonal frequency division multiplexing symbols, the first communication node determines the index number of the channel state information reference signal port according to the time domain sequence of the resource group in which the port is positioned.
10. The method of claim 1, wherein the channel state information reference signal and the demodulation reference signal transmitted by the first communication node are both time division multiplexed with orthogonal frequency division multiplexed symbols of the same index number.
11. A method for transmitting a reference signal, comprising:
a second communication node receives a channel state information reference signal resource parameter sent by a first communication node;
the second communication node receives a channel state information reference signal sent by the first communication node according to the channel state information reference signal resource parameter, wherein the channel state information reference signal is received on a time-frequency resource corresponding to a channel state information reference signal port index number of the channel state information reference signal; wherein the channel state information reference signal resource parameters include: the index number of the OFDM symbol used by the channel state information reference signal.
12. The method of claim 11, wherein the csi-rs port index is determined by the second communications node based on a cdma resource group index.
13. The method of claim 12, wherein the csi-rs port index increases as the index of the set of cdma resources increases.
14. The method of claim 13, wherein the csi-rs port index is determined by the following equation:
p '+ iL, where p is the channel state information reference signal port index, p' is the port index in the code division multiplexing group where the channel state information reference signal is located, L is the number of ports included in the code division multiplexing group, and i is the index of the code division multiplexing group.
15. The method of claim 12, wherein the index number of the set of code division multiplexing resources is determined by the second communication node according to frequency domain frequency levels of the set of code division multiplexing resources.
16. The method of claim 15, wherein the index number for the set of code division multiplexing resources is determined by the second communications node based on one of: the frequency domain of the code division multiplexing resource group and the time domain sequence of the code division multiplexing resource group.
17. The method of claim 16, wherein the index number of the set of code division multiplexing resources is determined by the second communication node from frequency domain frequencies of the set of code division multiplexing resources within the same orthogonal frequency division multiplexing symbol; and determining the index number of the code division multiplexing resource group by the second communication node according to the time domain sequence of the code division multiplexing resource group among different orthogonal frequency division multiplexing symbols.
18. The method of claim 11, wherein the channel state information reference signal port index number is determined by the second communication node according to a resource group location where a port corresponding to the channel state information reference signal is located.
19. The method of claim 18, wherein the channel state information reference signal port index number is determined by the second communication node according to the frequency of the resource group in which the port is located within the same orthogonal frequency division multiplexing symbol; and determining the index number of the channel state information reference signal port by the second communication node according to the time sequence of the resource group of the port among different orthogonal frequency division multiplexing symbols.
20. The method of claim 11, wherein the csi reference signal and the dm reference signal transmitted by the first communication node are both time division multiplexed with orthogonal frequency division multiplexed symbols of the same index.
21. The method of claim 20, wherein Downlink Control Information (DCI) transmitted by the first communication node via a downlink control information format is received, wherein the first communication node indicates, via the DCI, a time division multiplexing transmission condition of the channel state information reference signal and the demodulation reference signal on the Orthogonal Frequency Division Multiplexing (OFDM) symbol.
22. A transmission apparatus for a reference signal, applied to a first communication node, comprising:
a configuration module, configured to configure a channel state information reference signal resource parameter for a second communication node, and send the channel state information reference signal resource parameter to the second communication node;
a sending module, configured to send the channel state information reference signal to the second communication node according to the channel state information reference signal resource parameter, where the sending module maps the channel state information reference signal on a time-frequency resource corresponding to a channel state information reference signal port index number according to the channel state information reference signal port index number, and transmits the channel state information reference signal; wherein the channel state information reference signal resource parameters include: the index number of the OFDM symbol used by the channel state information reference signal.
23. A transmission apparatus for a reference signal, applied to a second communication node, comprising:
a first receiving module, configured to receive a channel state information reference signal resource parameter sent by a first communication node;
a second receiving module, configured to receive a channel state information reference signal sent by a first communication node according to the channel state information reference signal resource parameter, where the channel state information reference signal is received on a time-frequency resource corresponding to a channel state information reference signal port index number of the channel state information reference signal; wherein the channel state information reference signal resource parameters include: the index number of the OFDM symbol used by the channel state information reference signal.
24. A first communications node, comprising:
a first processor, configured to configure a channel state information reference signal resource parameter for a second communication node, and map the channel state information reference signal on a time-frequency resource corresponding to a channel state information reference signal port index number according to the channel state information reference signal port index number;
a first communication device, configured to send the channel state information reference signal resource parameter to a second communication node, and send the channel state information reference signal to the second communication node on the time-frequency resource according to the channel state information reference signal resource parameter; wherein the channel state information reference signal resource parameters include: the index number of the OFDM symbol used by the channel state information reference signal.
25. A second communications node, comprising:
the second communication device is used for receiving the channel state information reference signal resource parameter sent by the first communication node;
a second processor, configured to receive a channel state information reference signal sent by a first communication node according to the channel state information reference signal resource parameter, where the processor receives the channel state information reference signal on a time-frequency resource corresponding to a channel state information reference signal port index number of the channel state information reference signal through the second communication device; wherein the channel state information reference signal resource parameters include: the index number of the OFDM symbol used by the channel state information reference signal.
26. A storage medium comprising a stored program, wherein the program when executed performs the method of any one of claims 1 to 10 and the method of any one of claims 11 to 21.
27. A processor, characterized in that the processor is configured to run a program, wherein the program when running performs the method of any of the preceding claims 1 to 10, and the method of any of the claims 11 to 21.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114884634A (en) * 2022-04-29 2022-08-09 华为技术有限公司 Communication method, device and equipment
CN117014259A (en) * 2023-09-27 2023-11-07 北京交通大学 Channel recording method, device and equipment based on 5G downlink periodic reference signal

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020029258A1 (en) * 2018-08-10 2020-02-13 富士通株式会社 Methods and apparatuses for information transmission and reception
CN115473617B (en) * 2018-09-14 2024-06-04 华为技术有限公司 Reference signal configuration method and device
CN112020092B (en) * 2019-05-31 2022-05-24 华为技术有限公司 Channel information acquisition method and device
CN112235087B (en) * 2019-07-15 2023-08-15 中国移动通信有限公司研究院 Demodulation reference signal configuration method, terminal and network side equipment
WO2021062608A1 (en) * 2019-09-30 2021-04-08 华为技术有限公司 Method and apparatus for determining resource mapping of channel state information reference signal
CN113225168B (en) * 2020-02-05 2023-02-17 维沃移动通信有限公司 Transmission method, device, terminal, equipment and medium for demodulation reference signal
US20230327915A1 (en) * 2020-09-11 2023-10-12 Beijing Xiaomi Mobile Software Co., Ltd. Channel estimation method and apparatus, communication device, and storage medium
CN114338322A (en) * 2020-09-30 2022-04-12 华为技术有限公司 Method and device for mapping reference signals
WO2022150941A1 (en) * 2021-01-12 2022-07-21 Nokia Shanghai Bell Co., Ltd. Transmitting channel state information reference signal for unequal subband size

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110170435A1 (en) * 2010-01-12 2011-07-14 Samsung Electronics Co. Ltd. Method for processing csi-rs in wireless communication system
CN102438312A (en) * 2010-09-29 2012-05-02 中兴通讯股份有限公司 Mobile communication system and CSI-RS (channel state indication reference signal) configuring method thereof
CN102437986A (en) * 2010-09-29 2012-05-02 中兴通讯股份有限公司 Reference signal mapping method and device
CN102884751A (en) * 2010-05-04 2013-01-16 高通股份有限公司 Methods and apparatuses for using channel state information reference signals
US20130176978A1 (en) * 2010-08-16 2013-07-11 Ntt Docomo, Inc. Signaling method of csi-rs and base station apparatus
US20140112287A1 (en) * 2011-06-22 2014-04-24 Lg Electronics Inc. Method and apparatus for allocating reference signal port in wireless communication system
US20150244508A1 (en) * 2012-09-11 2015-08-27 Lg Electronics Inc. Method and apparatus for transmitting channel state information-reference signals in wireless communication system
US20160301511A1 (en) * 2015-04-10 2016-10-13 Innovative Technology Lab Co., Ltd. Method and apparatus for transmitting and receiving channel state information reference signal in full dimension mimo wireless communication system
CN106160826A (en) * 2015-04-20 2016-11-23 中国移动通信集团公司 CSI-RS configuration and CSI feedback method, device and relevant device
US20170086195A1 (en) * 2015-09-18 2017-03-23 Lg Electronics Inc. Method of transmitting channel state information and apapratus therefor
CN106549745A (en) * 2015-09-17 2017-03-29 中兴通讯股份有限公司 The sending method and device of reference signal, method of reseptance and device
CN106559199A (en) * 2015-09-25 2017-04-05 中兴通讯股份有限公司 A kind of method and device of configurating channel state measurement pilot tone

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101540631B (en) * 2009-04-27 2014-03-12 中兴通讯股份有限公司 Multi-antenna sending method and device for measuring reference signal
EP2466836B1 (en) * 2009-08-14 2020-12-30 LG Electronics Inc. Method and apparatus for transmitting downlink reference signal in wireless communication system that supports multiple antennas
KR101757452B1 (en) * 2010-01-08 2017-07-13 삼성전자주식회사 A method for mapping and demapping resource in a wireless communication system and an apparatus thereof
JP5273886B2 (en) * 2010-02-24 2013-08-28 ゼットティーイー コーポレイション Method and system for CSI-RS resource allocation in LTE-ADVANCE system
CN103179664B (en) * 2011-12-20 2016-09-07 中兴通讯股份有限公司 Port mapping, pre-coding matrix and modulation coding mode system of selection and device
CN104054293B (en) * 2012-01-18 2017-10-24 Lg电子株式会社 It is used for the method and apparatus of the operation based on enhanced control channel in wireless communication system
CN106685503B (en) * 2015-11-06 2022-07-15 中兴通讯股份有限公司 Configuration method and device of channel state measurement pilot frequency CSI-RS
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

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110170435A1 (en) * 2010-01-12 2011-07-14 Samsung Electronics Co. Ltd. Method for processing csi-rs in wireless communication system
CN102884751A (en) * 2010-05-04 2013-01-16 高通股份有限公司 Methods and apparatuses for using channel state information reference signals
US20130176978A1 (en) * 2010-08-16 2013-07-11 Ntt Docomo, Inc. Signaling method of csi-rs and base station apparatus
CN102438312A (en) * 2010-09-29 2012-05-02 中兴通讯股份有限公司 Mobile communication system and CSI-RS (channel state indication reference signal) configuring method thereof
CN102437986A (en) * 2010-09-29 2012-05-02 中兴通讯股份有限公司 Reference signal mapping method and device
US20140112287A1 (en) * 2011-06-22 2014-04-24 Lg Electronics Inc. Method and apparatus for allocating reference signal port in wireless communication system
US20150244508A1 (en) * 2012-09-11 2015-08-27 Lg Electronics Inc. Method and apparatus for transmitting channel state information-reference signals in wireless communication system
US20160301511A1 (en) * 2015-04-10 2016-10-13 Innovative Technology Lab Co., Ltd. Method and apparatus for transmitting and receiving channel state information reference signal in full dimension mimo wireless communication system
CN106160826A (en) * 2015-04-20 2016-11-23 中国移动通信集团公司 CSI-RS configuration and CSI feedback method, device and relevant device
CN106549745A (en) * 2015-09-17 2017-03-29 中兴通讯股份有限公司 The sending method and device of reference signal, method of reseptance and device
US20170086195A1 (en) * 2015-09-18 2017-03-23 Lg Electronics Inc. Method of transmitting channel state information and apapratus therefor
CN106559199A (en) * 2015-09-25 2017-04-05 中兴通讯股份有限公司 A kind of method and device of configurating channel state measurement pilot tone

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SAMSUNG等: "R1-1707981 "Remaining issues on NR CSI-RS"", 《3GPP TSG_RAN\WG1_RL1》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114884634A (en) * 2022-04-29 2022-08-09 华为技术有限公司 Communication method, device and equipment
CN117014259A (en) * 2023-09-27 2023-11-07 北京交通大学 Channel recording method, device and equipment based on 5G downlink periodic reference signal
CN117014259B (en) * 2023-09-27 2024-01-02 北京交通大学 Channel recording method, device and equipment based on 5G downlink periodic reference signal

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