CN108809574B - CSI-RS configuration method and device, computer readable storage medium, base station and user equipment - Google Patents

CSI-RS configuration method and device, computer readable storage medium, base station and user equipment Download PDF

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Publication number
CN108809574B
CN108809574B CN201710312333.1A CN201710312333A CN108809574B CN 108809574 B CN108809574 B CN 108809574B CN 201710312333 A CN201710312333 A CN 201710312333A CN 108809574 B CN108809574 B CN 108809574B
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csi
synchronization signal
index information
signal block
user equipment
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CN108809574A (en
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周化雨
贾亚男
汪绍飞
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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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
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0426—Power distribution
    • H04B7/043—Power distribution using best eigenmode, e.g. beam forming or beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2662—Symbol synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2669—Details of algorithms characterised by the domain of operation
    • H04L27/2671—Time domain
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2675—Pilot or known symbols

Abstract

A CSI-RS configuration method and device, a computer readable storage medium, a base station and user equipment, the method comprises the following steps: determining CSI-RS of a cell level; sending index information of a synchronization signal block to user equipment so that the user equipment determines the time-frequency position of the CSI-RS based on the index information; and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation. The scheme of the invention enables the base station to send a small amount of bit number information to enable the user equipment to determine the time-frequency position of the CSI-RS, thereby realizing the efficient configuration of the CSI-RS.

Description

CSI-RS configuration method and device, computer readable storage medium, base station and user equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a CSI-RS configuration method and apparatus, a computer-readable storage medium, a base station, and a user equipment.
Background
In the 5G system, a synchronization signal, a physical broadcast channel, is transmitted in a synchronization signal block manner, and a beam sweeping function is introduced. Each synchronization signal block can be regarded as a resource of one beam (analog domain) in a beam sweeping (beam sweeping) process, i.e., a process in which the synchronization signal block is repeatedly transmitted on different beams. Through the training of scanning the beams, the user equipment can perceive the strongest signal on which beam.
The beam used by the synchronization signal block is typically a wide beam, the antenna gain of which is sufficient for idle user equipment. However, antenna gain is not sufficient for connected user equipment, and thinner beams are generally required. From wide beam to narrow beam, a new training procedure for the user equipment is required. Usually, the training of the narrow beam is performed through a Channel State Information Reference Signal (CSI-RS) of a Cell-specific configuration (Cell-specific configured), which is common to the user equipment, and is usually at a Cell level, also called a Cell-level CSI-RS (Cell-level CSI-RS), and may also be called a CSI-RS common to the user equipment or a CSI-RS common to a user equipment group.
In the prior art, training of narrow beams is usually performed after a Random Access (RA). Specifically, taking the LTE system as an example, after RA, the base station configures a beamformed CSI-RS for the ue through Radio Resource Control (RRC) reconfiguration, and the ue measures the signal strength of the beamformed CSI-RS and determines one or more beamformed CSI-RSs with strongest signals to serve as candidate beams for subsequent data transmission with the base station, where one beamformed CSI-RS may be regarded as one beam.
However, in the 5G system, especially in the high frequency band, due to severe signal fading in the lower frequency band, the narrow beam training needs to be completed earlier, for example, in or before RA, that is, CSI-RS needs to be configured more efficiently, so that the user equipment can acquire the time-frequency position of CSI-RS more quickly to perform signal strength measurement.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a CSI-RS configuration method and device, a computer readable storage medium, a base station and user equipment, so that the base station can send information with a small number of bits to enable the user equipment to determine the time-frequency position of the CSI-RS, thereby realizing the efficient configuration of the CSI-RS.
To solve the foregoing technical problem, an embodiment of the present invention provides a CSI-RS configuration method, including the following steps: determining CSI-RS of a cell level; sending index information of a synchronization signal block to user equipment so that the user equipment determines the time-frequency position of the CSI-RS based on the index information; and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation.
Optionally, the step of obtaining the index information of the synchronization signal block and the time-frequency position of the CSI-RS by using the predefined correspondence includes: the index information of one or more synchronization signal blocks corresponds to the time-frequency position of the CSI-RS of one cell level.
Optionally, the CSI-RS configuration method further includes: by log2S bits inform the user equipment of the number of OFDM symbols mapped by the CSI-RS; wherein S is used to represent the maximum number of OFDM symbols of the CSI-RS mapping.
Optionally, the CSI-RS configuration method further includes: informing the user equipment of the number of antenna ports of the CSI-RS, so that the user equipment measures each antenna port to obtain the received power of each narrow beam based on the number of antenna ports of the CSI-RS, and determines the antenna port of the CSI-RS corresponding to the narrow beam with the strongest received power; and receiving the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power fed back by the user equipment.
Optionally, a group of narrow beams corresponding to the CSI-RS and a wide beam corresponding to the synchronization signal block have a beam binding relationship therebetween.
Optionally, the index information of the synchronization signal block is notified to the ue through a MAC PDU.
Optionally, the index information of the synchronization signal block is notified to the ue through a MAC PDU corresponding to a random access response.
Optionally, the index information of the synchronization signal block is notified to the user equipment through RRC signaling.
Optionally, the index information of the synchronization signal block is notified to the ue through a master information block or remaining minimum system information in a physical broadcast channel.
Optionally, the index information is selected from a set of indexes of the synchronization signal blocks that may be transmitted.
Optionally, the index information is selected from a set of indexes of the actually transmitted synchronization signal block.
Optionally, the CSI-RS and the secondary synchronization signal in the synchronization signal block are located in the same symbol.
Optionally, the CSI-RS and the secondary synchronization signal and the primary synchronization signal in the synchronization signal block are located in the same two symbols.
Optionally, the CSI-RS configuration method further includes: informing the user equipment whether the CSI-RS is activated or deactivated through a MAC CE.
To solve the foregoing technical problem, an embodiment of the present invention provides a CSI-RS configuration method, including the following steps: receiving index information of a synchronization signal block from a base station; determining a time-frequency position of the CSI-RS based on the index information; and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation.
Optionally, the step of obtaining the index information of the synchronization signal block and the time-frequency position of the CSI-RS by using the predefined correspondence includes: the index information of one or more synchronization signal blocks corresponds to the time-frequency position of the CSI-RS of one cell level.
Optionally, the CSI-RS configuration method further includes: receiving log from the base station2S bits for indicating the number of OFDM symbols mapped by the CSI-RS; wherein S is used to represent the maximum number of OFDM symbols of the CSI-RS mapping.
Optionally, the CSI-RS configuration method further includes: receiving the number of antenna ports of the CSI-RS from the base station; measuring each antenna port to obtain the receiving power of each narrow beam based on the number of the antenna ports of the CSI-RS, and determining the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power; and feeding back the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power to the base station.
Optionally, a group of narrow beams corresponding to the CSI-RS and a wide beam corresponding to the synchronization signal block have a beam binding relationship therebetween.
Optionally, the index information of the synchronization signal block is sent by the base station through a MAC PDU.
Optionally, the index information of the synchronization signal block is sent by the base station through a MAC PDU corresponding to a random access response.
Optionally, the index information of the synchronization signal block is sent by the base station through RRC signaling.
Optionally, the index information of the synchronization signal block is sent by the base station through a master information block or the remaining minimum system information in a physical broadcast channel.
Optionally, the index information is selected from a set of indexes of the synchronization signal blocks that may be transmitted.
Optionally, the index information is selected from a set of indexes of the actually transmitted synchronization signal block.
Optionally, the CSI-RS and the secondary synchronization signal in the synchronization signal block are located in the same symbol.
Optionally, the CSI-RS is mapped to two symbols that are located in the same two symbols as the secondary synchronization signal and the primary synchronization signal in the synchronization signal block.
Optionally, the CSI-RS configuration method further includes: receiving, from the base station, whether the CSI-RS is activated or deactivated through a MAC CE.
To solve the foregoing technical problem, an embodiment of the present invention provides a CSI-RS configuration apparatus, including: a determining module adapted to determine a cell-level CSI-RS; an index information sending module, adapted to send index information of a synchronization signal block to a user equipment, so that the user equipment determines a time-frequency position of the CSI-RS based on the index information; and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation.
Optionally, the step of obtaining the index information of the synchronization signal block and the time-frequency position of the CSI-RS by using the predefined correspondence includes: the index information of one or more synchronization signal blocks corresponds to the time-frequency position of the CSI-RS of one cell level.
Optionally, the CSI-RS configuring apparatus further includes: number of symbols informing module adapted to take log2S bits inform the user equipment of the number of OFDM symbols mapped by the CSI-RS; wherein S is used to represent the maximum number of OFDM symbols of the CSI-RS mapping.
Optionally, the CSI-RS configuring apparatus further includes: a port number informing module, adapted to inform the user equipment of the number of antenna ports of the CSI-RS, so that the user equipment measures each antenna port to obtain the received power of each narrow beam based on the number of antenna ports of the CSI-RS, and determines the antenna port of the CSI-RS corresponding to the narrow beam with the strongest received power; and the receiving module is suitable for receiving the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power fed back by the user equipment.
Optionally, a group of narrow beams corresponding to the CSI-RS and a wide beam corresponding to the synchronization signal block have a beam binding relationship therebetween.
Optionally, the index information of the synchronization signal block is notified to the ue through a MAC PDU.
Optionally, the index information of the synchronization signal block is notified to the ue through a MAC PDU corresponding to a random access response.
Optionally, the index information of the synchronization signal block is notified to the user equipment through RRC signaling.
Optionally, the index information of the synchronization signal block is notified to the ue through a master information block or remaining minimum system information in a physical broadcast channel.
Optionally, the index information is selected from a set of indexes of the synchronization signal blocks that may be transmitted.
Optionally, the index information is selected from a set of indexes of the actually transmitted synchronization signal block.
Optionally, the CSI-RS and the secondary synchronization signal in the synchronization signal block are located in the same symbol.
Optionally, the CSI-RS is mapped to two symbols that are located in the same two symbols as the secondary synchronization signal and the primary synchronization signal in the synchronization signal block.
Optionally, the CSI-RS configuring apparatus further includes: an activation informing module adapted to inform the user equipment through a MAC CE whether the CSI-RS is activated or deactivated.
To solve the foregoing technical problem, an embodiment of the present invention provides a CSI-RS configuration apparatus, including: the index information receiving module is suitable for receiving the index information of the synchronous signal block from the base station; a location determination module adapted to determine a time-frequency location of the CSI-RS based on the index information; and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation.
Optionally, the step of obtaining the index information of the synchronization signal block and the time-frequency position of the CSI-RS by using the predefined correspondence includes: the index information of one or more synchronization signal blocks corresponds to the time-frequency position of the CSI-RS of one cell level.
Optionally, the CSI-RS configuring apparatus further includes: a symbol number receiving module adapted to receive log from the base station2S bits for indicating the number of OFDM symbols mapped by the CSI-RS; wherein S is used to represent the maximum number of OFDM symbols of the CSI-RS mapping.
Optionally, the CSI-RS configuring apparatus further includes: a port number receiving module adapted to receive the number of antenna ports of the CSI-RS from the base station; the power measurement module is suitable for measuring each antenna port to obtain the receiving power of each narrow beam based on the number of the antenna ports of the CSI-RS, and determining the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power; and the feedback module is suitable for feeding back the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power to the base station.
Optionally, a group of narrow beams corresponding to the CSI-RS and a wide beam corresponding to the synchronization signal block have a beam binding relationship therebetween.
Optionally, the index information of the synchronization signal block is sent by the base station through a MAC PDU.
Optionally, the index information of the synchronization signal block is sent by the base station through a MAC PDU corresponding to a random access response.
Optionally, the index information of the synchronization signal block is sent by the base station through RRC signaling.
Optionally, the index information of the synchronization signal block is sent by the base station through a master information block or the remaining minimum system information in a physical broadcast channel.
Optionally, the index information is selected from a set of indexes of the synchronization signal blocks that may be transmitted.
Optionally, the index information is selected from a set of indexes of the actually transmitted synchronization signal block.
Optionally, the CSI-RS and the secondary synchronization signal in the synchronization signal block are located in the same symbol.
Optionally, the CSI-RS is mapped to two symbols that are located in the same two symbols as the secondary synchronization signal and the primary synchronization signal in the synchronization signal block.
Optionally, the CSI-RS configuring apparatus further includes: an activation receiving module adapted to receive from the base station through a MAC CE whether the CSI-RS is activated or deactivated.
To solve the above technical problem, an embodiment of the present invention provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions, when executed, perform the steps of the CSI-RS configuration method.
In order to solve the above technical problem, an embodiment of the present invention provides a base station, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the base station is characterized in that the processor executes the steps of the CSI-RS configuration method when executing the computer instructions.
In order to solve the foregoing technical problem, an embodiment of the present invention provides a user equipment, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the CSI-RS configuration method when executing the computer instructions.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, CSI-RS of a cell level is determined; sending index information of a synchronization signal block to user equipment so that the user equipment determines the time-frequency position of the CSI-RS based on the index information; and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation. By adopting the scheme, the base station can implicitly indicate the time-frequency position of the CSI-RS of one cell level only by sending the index information of the synchronization signal block according to the corresponding relation between the index information of the predefined synchronization signal block and the time-frequency position of the CSI-RS, and compared with the method for informing the time-frequency position of the CSI-RS of the user equipment by adopting various parameters in the prior art, the base station can only send a small amount of bits of information even if the user equipment determines the time-frequency position of the CSI-RS, so that the high-efficiency configuration of the CSI-RS is realized.
Further, in embodiments of the present invention, log may be employed2And the S bits inform the user equipment of the number of OFDM symbols mapped by the CSI-RS, so that when the maximum number of OFDM symbols mapped by the CSI-RS is less, the transmission overhead of symbol number information is saved.
Further, in the embodiment of the present invention, the base station informs the user equipment of the number of antenna ports of the CSI-RS, so that the user equipment determines, through measurement, the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power, and thus uses the narrow beam as a candidate beam for data transmission between the subsequent base station and the user equipment, so as to improve the effectiveness of signal transmission.
Further, in the embodiment of the present invention, a group of narrow beams corresponding to the CSI-RS has a beam binding relationship with a wide beam corresponding to the synchronization signal block, and the received power of the wide beam of the synchronization signal block can be derived based on the received power of one or more narrow beams without measurement, so that measurement resources are effectively saved.
Furthermore, the number of bits of the index information is determined based on the total number of the actually transmitted synchronization signal blocks, which is beneficial to saving the overhead of the index information when the number of the actually transmitted synchronization signal blocks of the base station is small.
Further, in the embodiment of the present invention, the CSI-RS and the secondary synchronization signal in the synchronization signal block are located in the same symbol, or located in the same two symbols as the secondary synchronization signal and the primary synchronization signal in the synchronization signal block, which may multiplex symbol resources of existing signals, thereby effectively saving resource overhead.
Drawings
FIG. 1 is a flowchart of a CSI-RS configuration method according to an embodiment of the present invention
FIG. 2 is a partial flowchart of another CSI-RS configuration method according to an embodiment of the present invention
Fig. 3 is a data flow diagram of another CSI-RS configuration method according to an embodiment of the present invention;
fig. 4 is a flowchart of a CSI-RS configuration method according to another embodiment of the present invention;
fig. 5 is a partial flowchart of another CSI-RS configuration method according to an embodiment of the present invention;
fig. 6 is a data flow diagram of another CSI-RS configuration method according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a CSI-RS configuration apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another CSI-RS configuration apparatus according to an embodiment of the present invention.
Detailed Description
In 5G systems, the Synchronization Signal, a physical broadcast channel, is transmitted in the form of a Synchronization Signal-block (SS-block), and introduces a beam-sweeping function. Each synchronization signal block can be regarded as a resource of one beam (analog domain) in a beam sweeping (beam sweeping) process, i.e., a process in which the synchronization signal block is repeatedly transmitted on different beams. Through the training of scanning the beams, the user equipment can perceive the strongest signal on which beam.
Among them, a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH) are in a Synchronization Signal block. A plurality of Synchronization Signal blocks form a Synchronization Signal burst (SS-burst), which can be regarded as a relatively centralized resource including a plurality of beams, and the plurality of Synchronization Signal bursts form a Synchronization Signal burst-set (SS-burst-set).
In the prior art, training of narrow beams is usually performed after a Random Access (RA). However, in the 5G system, especially in the high frequency band, due to severe signal fading in the lower frequency band, the narrow beam training needs to be completed earlier, for example, in or before RA, that is, CSI-RS needs to be configured more efficiently, so that the user equipment can acquire the time-frequency position of CSI-RS more quickly to perform signal strength measurement. Therefore, a configuration of transmitting CSI-RS in a master information block or remaining minimum system information or random access response signaling may be required. In this case, it is necessary to consider reducing overhead of the configuration information of the CSI-RS as much as possible.
In the embodiment of the invention, CSI-RS of a cell level is determined; sending index information of a synchronization signal block to user equipment so that the user equipment determines the time-frequency position of the CSI-RS based on the index information; and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation. By adopting the scheme, the base station can implicitly indicate the time-frequency position of the CSI-RS of one cell level only by sending the index information of the synchronization signal block according to the corresponding relation between the index information of the predefined synchronization signal block and the time-frequency position of the CSI-RS, and compared with the method for informing the time-frequency position of the CSI-RS of the user equipment by adopting various parameters in the prior art, the base station can only send a small amount of bits of information even if the user equipment determines the time-frequency position of the CSI-RS, so that the high-efficiency configuration of the CSI-RS is realized.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, fig. 1 is a flowchart of a CSI-RS configuration method according to an embodiment of the present invention. The CSI-RS configuration method may be used on the base station side, and may include steps S11 to S12:
step S11: determining CSI-RS of a cell level;
step S12: and sending index information of a synchronization signal block to user equipment so that the user equipment determines the time-frequency position of the CSI-RS based on the index information.
In the specific implementation of step S11, in order to complete the narrow beam training in the random access process of the 5G system, the CSI-RS at the cell level needs to be determined in or before the random access process, and then the CSI-RS is configured.
In a specific implementation of step S12, based on that the index information of the synchronization signal block has a predefined corresponding relationship with the time-frequency position of the CSI-RS, the ue may determine the time-frequency position of the CSI-RS based on the index information by sending the index information of the synchronization signal block to the ue.
In particular, the index information is used to identify the synchronization signal block, which may be, for example, a block number of the synchronization signal block or other information suitable for identifying the synchronization signal block.
Further, the step of enabling the index information of the synchronization signal block to have a predefined correspondence with the time-frequency position of the CSI-RS comprises: the index information of one or more synchronization signal blocks corresponds to the time-frequency position of the CSI-RS of one cell level.
Specifically, the index information of the synchronization signal blocks and the time-frequency position of the cell-level CSI-RS may not be in a one-to-one correspondence, but the index information of one or more synchronization signal blocks corresponds to the time-frequency position of one cell-level CSI-RS. More specifically, two or more synchronization signal blocks may correspond to one and the same wide beam, based on the degree of freedom implemented by the base station, i.e., the base station transmits multiple synchronization signal blocks using one wide beam. When the user equipment receives this configuration, the measurement accuracy can be improved by combining the measurement values of the plurality of synchronization signal blocks. At this time, the base station usually frequency-division multiplexes only one cell-level CSI-RS on one of the synchronization signal blocks, so that the index information of the synchronization signal block does not correspond to the time-frequency position of the cell-level CSI-RS.
Further, the step of enabling the index information of the synchronization signal block to have a predefined corresponding relationship with the identification number of the CSI-RS comprises: the index information of one or more synchronization signal blocks corresponds to an identification number of a CSI-RS of a cell level. The predefined correspondence between the identification number of the CSI-RS and the time-frequency position of the CSI-RS comprises the following steps: the identification number of one CSI-RS corresponds to the time-frequency position of one CSI-RS. Further, when the base station transmits a plurality of synchronization signal blocks, not every synchronization signal block binds to CSI-RS of the same cell level. Therefore, index information indicating a certain synchronization signal block in the CSI-RS configuration of the cell level is necessary.
In the embodiment of the invention, the base station can implicitly indicate the time-frequency position of the CSI-RS of one cell level only by sending the index information of the synchronization signal block according to the corresponding relation between the index information of the predefined synchronization signal block and the time-frequency position of the CSI-RS, and compared with the method for informing the time-frequency position of the CSI-RS of the user equipment by adopting various parameters in the prior art, the scheme of the embodiment of the invention can ensure that the base station can only send a small amount of bits of information even if the user equipment determines the time-frequency position of the CSI-RS, thereby realizing the high-efficiency configuration of the CSI-RS.
Further, the base station may employ log2And the user equipment is informed of the number of OFDM symbols of the CSI-RS mapping by S bits, wherein S is used for representing the maximum number of OFDM symbols of the CSI-RS mapping.
Specifically, the number of antenna ports (ports) of the cell-level CSI-RS may be any value from 1 to N, where N is a positive integer, and in a 5G system, is typically 8. When the number of antenna ports of the cell-level CSI-RS is large, for example, N is 8, mapping the cell-level CSI-RS to one OFDM symbol may result in a small number of Resource Elements (REs) per antenna port, and eventually result in an inaccurate measurement value per beam, so that the cell-level CSI-RS may need to be mapped to 2 or more symbols.
When the CSI-RS is mapped to a plurality of symbols, the base station may indicate the number of symbols to be mapped to the cell-level CSI-RS using bits of a preset number of bits, where the bits of the preset number of bits are determined based on the maximum number of symbols S mapped to the CSI-RS (S is a positive integer), and specifically, may use a log2S bits.
As a non-limiting example, log is required when the maximum number of symbols S is 828-3 bits to indicate the number of symbols that the cell-level CSI-RS needs to map, e.g., when the number of symbols is 1, setThe value of the 3 bits is 001, and when the number of symbols is 6, the value of the 3 bits is set to 110.
In embodiments of the present invention, log may be employed2And the S bits inform the user equipment of the number of OFDM symbols mapped by the CSI-RS, so that when the maximum number of OFDM symbols mapped by the CSI-RS is less, the transmission overhead of symbol number information is saved.
Referring to fig. 2, fig. 2 is a partial flowchart of another CSI-RS configuration method according to an embodiment of the present invention. The other CSI-RS configuration method further includes steps S21 to S22:
step S21: informing the user equipment of the number of antenna ports of the CSI-RS, so that the user equipment measures each antenna port to obtain the received power of each narrow beam based on the number of antenna ports of the CSI-RS, and determines the antenna port of the CSI-RS corresponding to the narrow beam with the strongest received power;
step S22: and receiving the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power fed back by the user equipment.
In an implementation of step S21, each antenna Port (Port) of the cell-level CSI-RS may correspond to a narrow beam, and the ue measures the antenna Port to obtain a received Power, e.g., a Reference Signal Receiving Power (RSRP), of the corresponding narrow beam as a measurement result of the narrow beam.
Specifically, the base station informs the user equipment of the number of antenna ports of the CSI-RS, so that the user equipment measures the antenna ports corresponding to the number of antenna ports of the CSI-RS to obtain the received power of each corresponding narrow beam, and determines the antenna port of the CSI-RS corresponding to the narrow beam with the strongest received power.
In a specific implementation of step S22, for the number of antenna ports of the CSI-RS corresponding to the narrow beam with the strongest receiving power, the number of the antenna port fed back by the user equipment is received.
In the embodiment of the invention, the base station informs the user equipment of the number of antenna ports of the CSI-RS, so that the user equipment determines the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power through measurement, and the narrow beam is used as a candidate beam for data transmission between the subsequent base station and the user equipment, thereby improving the effectiveness of signal transmission.
Referring to fig. 3, fig. 3 is a data flow diagram of another CSI-RS configuration method according to an embodiment of the present invention. The other CSI-RS configuration method may include steps S31 to S34, which are described in detail below.
In step S31, the base station 31 determines the CSI-RS of the cell level.
In step S32, the base station 31 transmits index information of the synchronization signal block to the user equipment 32.
In step S33, the base station 31 informs the user equipment 32 of the number of antenna ports of the CSI-RS.
In step S34, the base station 31 receives the number of the CSI-RS antenna port corresponding to the narrow beam with the strongest received power, which is received and fed back by the user equipment 32.
For more details regarding steps S31 to S34, please refer to the related description regarding the CSI-RS configuration method shown in fig. 1 to 2 and described above, and will not be repeated herein.
Further, a group of narrow beams corresponding to the CSI-RS and a wide beam corresponding to the synchronization signal block have a beam binding relationship therebetween. Therefore, the base station can also indicate, to the user equipment, a beam bonding relationship between a group of narrow beams corresponding to the cell-level CSI-RS and a wide beam corresponding to the synchronization signal block at the same time by indicating the index information of the synchronization signal block, that is, the group of narrow beams corresponding to the cell-level CSI-RS may correspond to the wide beam corresponding to the synchronization signal block.
In the embodiment of the present invention, based on the beam binding relationship, the user equipment may obtain the received power of the narrow beam by measuring the CSI-RS, and further may derive the received power of the wide beam of the synchronization signal block according to the received power of one or more narrow beams, without obtaining the received power by measurement, thereby effectively saving measurement resources.
Further, the index information is selected from a set of indices of possible transmitted synchronization signal blocks.
Wherein the indexes of the possible transmitted synchronization signal blocks are predefined in a protocol, and the indexes of the possible transmitted synchronization signal blocks are sequence numbers after sorting the possible transmitted synchronization signal blocks.
Still further, the index information is selected from a set of indexes of the actually transmitted synchronization signal block.
The real transmitted synchronization signal block is a synchronization signal block which selects a partial time domain position from the time domain positions of the possible transmitted synchronization signal blocks and is really transmitted to the user equipment at the partial time domain position; the real transmitted synchronization signal blocks may further include synchronization signal blocks transmitted at time domain positions other than the time domain positions of the possible transmitted synchronization signal blocks; the index of the actually transmitted synchronization signal block is a sequence number after sorting the actually transmitted synchronization signal block.
Still further, the number of bits of the index information may be determined based on a total number of possible transmitted synchronization signal blocks, wherein a time domain position and the total number of the possible transmitted synchronization signal blocks are predefined in a protocol.
Still further, the number of bits of the index information may be determined based on the total number of actually transmitted synchronization signal blocks.
Specifically, the synchronization signal blocks transmitted by the base station can be divided into two types: the synchronization signal blocks which are actually transmitted by the base station are subsets of the synchronization signal blocks which are possibly transmitted. Correspondingly, the index information of the synchronization signal block can be divided into two types, one type is the index information of the synchronization signal block which can be transmitted, the time domain position and the total number of the synchronization signal block which can be transmitted are predefined in the protocol, but the base station does not necessarily really transmit; and the other is the index information of the synchronization signal block actually transmitted by the base station, wherein the actually transmitted synchronization signal block is the synchronization signal block which selects a partial time domain position from the time domain positions of the synchronization signal blocks which can be transmitted and is actually transmitted to the user equipment at the partial time domain position. The index information of the synchronization signal block actually sent by the base station is cell-specific information related to cell deployment.
By adopting the scheme of the embodiment of the invention, when the base station sends the index information of the synchronous signal block to the user equipment, the index information of the synchronous signal block which can be sent, and only the index information of the synchronous signal block which is really sent can be sent.
In the embodiment of the present invention, the number of bits of the index information is determined based on the total number of the synchronization signal blocks actually sent, which is beneficial to saving the overhead of the index information when the number of the synchronization signal blocks actually sent by the base station is small.
Further, the CSI-RS and the secondary synchronization signal within the synchronization signal block may be located within the same symbol.
Further, the CSI-RS may be located in the same two symbols as the secondary synchronization signal and the primary synchronization signal within the synchronization signal block. Specifically, the secondary synchronization signal in the synchronization signal block is located in one symbol, the primary synchronization signal in the synchronization signal block is located in another symbol, and the CSI-RS may be located in the two symbols.
In the embodiment of the invention, the CSI-RS and the auxiliary synchronization signal in the synchronization signal block are positioned in the same symbol, or the CSI-RS and the auxiliary synchronization signal and the main synchronization signal in the synchronization signal block are positioned in the same two symbols, so that the symbol resources of the existing signals can be multiplexed, and the resource overhead is effectively saved.
Further, the index Information of the synchronization signal Block may be configured to the ue through broadcast type signaling, for example, the index Information may be notified to the ue through a Master Information Block (MIB) or Remaining Minimum System Information (RMSI) in a physical broadcast channel.
The index Information of the synchronization signal block may be configured to the user equipment through an on-demand (on-demand) broadcast type signaling, for example, the user equipment applies to the base station by sending a Preamble, the base station sends Other System Information (OSI) to the user equipment after receiving the application, and the Other System Information includes the index Information of the synchronization signal block.
The index information of the synchronization signal block may be notified to the ue through a Media Access Control Protocol Data Unit (MAC PDU).
Further, the index information of the synchronization signal block may be notified to the ue through a MAC PDU corresponding to a Random Access Response (RAR).
Specifically, the index information of the synchronization signal block may be notified to the ue through a MAC PDU corresponding to RAR, and may also be notified to the ue through another MAC PDU. In the embodiment of the present invention, there is no limitation on which MAC PDU is specifically used.
The index information of the synchronization signal block may be signaled to the ue through Radio Resource Control (RRC) signaling.
Taking MAC PDU as an example, when user equipment initiates a random access process, a base station informs the user equipment of the index information of the synchronous signal block through the MAC PDU; when the cell-level CSI-RS configured to the user equipment is changed, the base station may inform the user equipment of index information of a new synchronization signal block through the MAC PDU.
In the embodiment of the present invention, the CSI-RS configuration method further includes a step of informing, by an MAC Control Entity (MAC CE), the user equipment whether the CSI-RS is activated or deactivated.
In particular, the CSI-RS is active, meaning that the user equipment can measure this CSI-RS; the CSI-RS is deactivated, meaning that the user equipment may not measure this CSI-RS.
Referring to fig. 4, fig. 4 is a flowchart of another CSI-RS configuration method according to an embodiment of the present invention. The still another CSI-RS configuration method may be used on the user equipment side, and may include steps S41 to S42:
step S41: receiving index information of a synchronization signal block from a base station;
step S42: determining a time-frequency position of the CSI-RS based on the index information.
In a specific implementation, the ue may determine the time-frequency location of the CSI-RS according to the index information of the synchronization signal block received from the base station, based on that the index information of the synchronization signal block and the time-frequency location of the CSI-RS have a predefined correspondence.
For more details regarding steps S41 to S42, please refer to the related description of the CSI-RS configuration method shown in fig. 1 and above, and will not be described herein again.
Referring to fig. 5, fig. 5 is a partial flowchart of another CSI-RS configuration method according to an embodiment of the present invention. The still another CSI-RS configuration method may further include steps S51 to S53:
step S51: receiving the number of antenna ports of the CSI-RS from the base station;
step S52: measuring each antenna port to obtain the receiving power of each narrow beam based on the number of the antenna ports of the CSI-RS, and determining the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power;
step S53: and feeding back the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power to the base station.
In a specific implementation of step S52, the user equipment measures the antenna port of the CSI-RS received from the base station based on the number of antenna ports of the CSI-RS to obtain the received power, e.g., RSRP, of the corresponding narrow beam as a measurement result of the narrow beam, and determines the antenna port of the CSI-RS corresponding to the narrow beam with the strongest received power.
In a specific implementation of step S53, after determining the antenna port of the CSI-RS corresponding to the narrow beam with the strongest received power, the ue feeds back the number of the antenna port to the base station.
For more details regarding steps S51 to S53, please refer to the related description related to another CSI-RS configuration method shown in fig. 2 and described above, and will not be repeated herein.
Referring to fig. 6, fig. 6 is a data flow diagram of another CSI-RS configuration method in the embodiment of the present invention. The still another CSI-RS configuration method may include steps S61 to S66, each of which is described in detail below.
In step S61, the user equipment 62 receives index information of the synchronization signal block from the base station 61.
In step S62, the user equipment 62 determines the time-frequency location of the CSI-RS based on the index information.
In step S63, the user equipment 62 receives the number of antenna ports of the CSI-RS from the base station 61.
In step S64, the user equipment 62 measures each antenna port to obtain the received power of each narrow beam based on the number of antenna ports of the CSI-RS.
In step S65, the user equipment 62 determines the antenna port of the CSI-RS corresponding to the narrow beam with the strongest received power.
In step S66, the user equipment 62 feeds back to the base station 61 the number of antenna ports of the CSI-RS corresponding to the narrow beam having the strongest received power.
For more details regarding steps S61 to S66, please refer to the related description related to another CSI-RS configuration method shown in fig. 3 and described above, and will not be repeated herein.
The embodiment of the invention also provides a structural schematic diagram of a CSI-RS configuration apparatus, as shown in fig. 7. The CSI-RS configuration apparatus may be used on the base station side, and may include a determination module 71, an index information transmission module 72, a symbol number notification module 73, a port number notification module 74, a reception module 75, and an activation notification module 76.
Wherein the determining module 71 is adapted to determine a cell-level CSI-RS.
The index information sending module 72 is adapted to send index information of a synchronization signal block to a user equipment, so that the user equipment determines a time-frequency position of the CSI-RS based on the index information; and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation.
Said sign number informing module 73 adapted to adopt log2S bits inform the user equipment of the number of OFDM symbols mapped by the CSI-RS; wherein S is used to represent the maximum number of OFDM symbols of the CSI-RS mapping.
The port number informing module 74 is adapted to inform the user equipment of the number of antenna ports of the CSI-RS, so that the user equipment measures each antenna port to obtain the received power of each narrow beam based on the number of antenna ports of the CSI-RS, and determines the antenna port of the CSI-RS corresponding to the narrow beam with the strongest received power;
the receiving module 75 is adapted to receive the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power, which is fed back by the user equipment.
The activation informing module 76 is adapted to inform the ue through the MAC CE whether the CSI-RS is activated or deactivated.
Further, the step of enabling the index information of the synchronization signal block to have a predefined correspondence with the time-frequency position of the CSI-RS comprises: the index information of one or more synchronization signal blocks corresponds to the time-frequency position of the CSI-RS of one cell level.
And a group of narrow beams corresponding to the CSI-RS and the wide beams corresponding to the synchronization signal block have a beam binding relationship.
The index information of the synchronization signal block is notified to the user equipment through a MAC PDU.
And the index information of the synchronization signal block is informed to the user equipment through a MAC PDU corresponding to a random access response.
The index information of the synchronization signal block is notified to the user equipment through RRC signaling.
The index information of the synchronization signal block is informed to the user equipment through a master information block or remaining minimum system information within a physical broadcast channel.
The index information is selected from a set of indices of possible transmitted synchronization signal blocks.
The index information is selected from a set of indexes of the actually transmitted synchronization signal block.
The CSI-RS and the auxiliary synchronization signal in the synchronization signal block are located in the same symbol.
The CSI-RS is mapped to be located in the same two symbols as the secondary synchronization signal and the primary synchronization signal within the synchronization signal block.
For more details of the CSI-RS configuration apparatus, please refer to the related description of the CSI-RS configuration method applied to the base station side shown in fig. 1 to fig. 3, which is not repeated herein.
Fig. 8 is a schematic structural diagram of another CSI-RS configuration apparatus according to an embodiment of the present invention. The other CSI-RS configuration apparatus may be used on the user equipment side, and may include an index information receiving module 81, a position determining module 82, a symbol number receiving module 83, a port number receiving module 84, a power measuring module 85, a feedback module 86, and an activation receiving module 87.
Wherein, the index information receiving module 81 is adapted to receive the index information of the synchronization signal block from the base station.
The location determination module 82 is adapted to determine a time-frequency location of the CSI-RS based on the index information; and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation.
The symbol number receiving module 83 is adapted to receive log from the base station2S bits for indicating the number of OFDM symbols mapped by the CSI-RS; wherein S is used to represent the maximum number of OFDM symbols of the CSI-RS mapping.
The port number receiving module 84 is adapted to receive the number of antenna ports of the CSI-RS from the base station;
the power measurement module 85 is adapted to measure each antenna port to obtain the received power of each narrow beam based on the number of antenna ports of the CSI-RS, and determine the port of the CSI-RS corresponding to the narrow beam with the strongest received power;
the feedback module 86 is adapted to feed back, to the base station, the number of the port of the CSI-RS corresponding to the narrow beam with the strongest receiving power.
The activation receiving module 87 is adapted to receive from the base station through the MAC CE whether the CSI-RS is activated or deactivated.
Further, the step of enabling the index information of the synchronization signal block to have a predefined correspondence with the time-frequency position of the CSI-RS comprises: the index information of one or more synchronization signal blocks corresponds to the time-frequency position of the CSI-RS of one cell level.
And a group of narrow beams corresponding to the CSI-RS and the wide beams corresponding to the synchronization signal block have a beam binding relationship.
The index information of the synchronization signal block is transmitted by the base station through a MAC PDU.
The index information of the synchronization signal block is sent by the base station through the MAC PDU corresponding to the random access response.
The index information of the synchronization signal block is sent by the base station through RRC signaling.
The index information of the synchronization signal block is transmitted by the base station through a master information block or the remaining minimum system information in a physical broadcast channel.
The index information is selected from a set of indices of possible transmitted synchronization signal blocks.
The index information is selected from a set of indexes of the actually transmitted synchronization signal block.
The CSI-RS and the auxiliary synchronization signal in the synchronization signal block are located in the same symbol.
The CSI-RS is mapped to be located in the same two symbols as the secondary synchronization signal and the primary synchronization signal within the synchronization signal block.
For more details of the CSI-RS configuration apparatus, please refer to the related descriptions of the CSI-RS configuration method applicable to the ue side shown in fig. 4 to fig. 6, which are not repeated herein.
The embodiment of the present invention further provides a computer-readable storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the CSI-RS configuration method applicable to the base station side are executed. The computer readable storage medium may be an optical disc, a mechanical hard disk, a solid state hard disk, etc.
The embodiment of the present invention further provides a computer-readable storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the CSI-RS configuration method applicable to the ue side are executed. The computer readable storage medium may be an optical disc, a mechanical hard disk, a solid state hard disk, etc.
The embodiment of the invention also provides a base station, which comprises a memory and a processor, wherein the memory is stored with computer instructions capable of running on the processor, and the processor executes the steps of the CSI-RS configuration method suitable for the base station side when running the computer instructions.
The embodiment of the present invention further provides a user equipment, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the steps of the CSI-RS configuration method applicable to the user terminal side when running the computer instruction.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (60)

1. A CSI-RS configuration method is characterized by comprising the following steps:
determining CSI-RS of a cell level;
sending index information of a synchronization signal block to user equipment so that the user equipment determines the time-frequency position of the CSI-RS based on the index information;
and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation.
2. The CSI-RS configuration method of claim 1, wherein the index information of the synchronization signal block having a predefined correspondence with the time-frequency position of the CSI-RS comprises: the index information of one or more synchronization signal blocks corresponds to the time-frequency position of the CSI-RS of one cell level.
3. The CSI-RS configuration method according to claim 1, further comprising:
by log2S bits inform the user equipment of the number of OFDM symbols mapped by the CSI-RS;
wherein S is used to represent the maximum number of OFDM symbols of the CSI-RS mapping.
4. The CSI-RS configuration method according to claim 1, further comprising:
informing the user equipment of the number of antenna ports of the CSI-RS, so that the user equipment measures each antenna port to obtain the received power of each narrow beam based on the number of antenna ports of the CSI-RS, and determines the antenna port of the CSI-RS corresponding to the narrow beam with the strongest received power;
and receiving the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power fed back by the user equipment.
5. The CSI-RS configuration method of claim 1, wherein a group of narrow beams corresponding to the CSI-RS and a wide beam corresponding to the synchronization signal block have a beam-bonding relationship therebetween.
6. The CSI-RS configuration method of claim 1, wherein the index information of the synchronization signal block is signaled to the UE through a MAC PDU.
7. The CSI-RS configuration method of claim 1, wherein the index information of the synchronization signal block is notified to the UE through a MAC PDU corresponding to a random access response.
8. The CSI-RS configuration method of claim 1, wherein the index information of the synchronization signal block is signaled to the user equipment through RRC signaling.
9. The CSI-RS configuration method of claim 1, wherein the index information of the synchronization signal block is informed to the user equipment through a master information block or remaining minimum system information within a physical broadcast channel.
10. The CSI-RS configuration method of claim 1, wherein the index information is selected from a set of indices of possible transmitted synchronization signal blocks.
11. The CSI-RS configuration method of claim 10, wherein the index information is selected from a set of indexes of a real transmitted synchronization signal block.
12. The CSI-RS configuration method of claim 1, wherein the CSI-RS is located in a same symbol as a secondary synchronization signal in the synchronization signal block.
13. The CSI-RS configuration method of claim 1, wherein the CSI-RS is located in the same two symbols as a secondary synchronization signal and a primary synchronization signal within the synchronization signal block.
14. The CSI-RS configuration method according to claim 1, further comprising:
informing the user equipment whether the CSI-RS is activated or deactivated through a MAC CE.
15. A CSI-RS configuration method is characterized by comprising the following steps:
receiving index information of a synchronization signal block from a base station;
determining a time-frequency position of the CSI-RS based on the index information;
and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation.
16. The CSI-RS configuration method of claim 15, wherein the index information of the synchronization signal block having a predefined correspondence with the time-frequency location of the CSI-RS comprises: the index information of one or more synchronization signal blocks corresponds to the time-frequency position of the CSI-RS of one cell level.
17. The CSI-RS configuration method of claim 15, further comprising:
receiving log from the base station2S bits for indicating the number of OFDM symbols mapped by the CSI-RS;
wherein S is used to represent the maximum number of OFDM symbols of the CSI-RS mapping.
18. The CSI-RS configuration method of claim 15, further comprising:
receiving the number of antenna ports of the CSI-RS from the base station;
measuring each antenna port to obtain the receiving power of each narrow beam based on the number of the antenna ports of the CSI-RS, and determining the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power;
and feeding back the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power to the base station.
19. The CSI-RS configuration method of claim 15, wherein a group of narrow beams corresponding to the CSI-RS and a wide beam corresponding to the synchronization signal block have a beam bonding relationship therebetween.
20. The CSI-RS configuration method of claim 15, wherein the index information of the synchronization signal block is transmitted by the base station through a MAC PDU.
21. The CSI-RS configuration method of claim 20, wherein the index information of the synchronization signal block is sent by the base station through a MAC PDU corresponding to a random access response.
22. The CSI-RS configuration method of claim 15, wherein the index information of the synchronization signal block is sent by the base station through RRC signaling.
23. The CSI-RS configuration method of claim 15, wherein the index information of the synchronization signal block is transmitted by the base station through a master information block or remaining minimum system information within a physical broadcast channel.
24. The CSI-RS configuration method of claim 15, wherein the index information is selected from a set of indices of possible transmitted synchronization signal blocks.
25. The CSI-RS configuration method of claim 24, wherein the index information is selected from a set of indexes of a real transmitted synchronization signal block.
26. The CSI-RS configuration method of claim 15, wherein the CSI-RS is located in the same symbol as the secondary synchronization signal in the synchronization signal block.
27. The CSI-RS configuration method of claim 15, wherein the CSI-RS is mapped to two symbols that are located in the same symbol as the secondary synchronization signal and the primary synchronization signal within the synchronization signal block.
28. The CSI-RS configuration method of claim 15, further comprising:
receiving, from the base station, whether the CSI-RS is activated or deactivated through a MAC CE.
29. An apparatus for CSI-RS configuration, comprising:
a determining module adapted to determine a cell-level CSI-RS;
an index information sending module, adapted to send index information of a synchronization signal block to a user equipment, so that the user equipment determines a time-frequency position of the CSI-RS based on the index information;
and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation.
30. The CSI-RS configuration apparatus of claim 29, wherein the index information of the synchronization signal block having a predefined correspondence with the time-frequency location of the CSI-RS comprises: the index information of one or more synchronization signal blocks corresponds to the time-frequency position of the CSI-RS of one cell level.
31. The CSI-RS configuration apparatus of claim 29, further comprising:
number of symbols informing module adapted to take log2S bits inform the user equipment of the number of OFDM symbols mapped by the CSI-RS;
wherein S is used to represent the maximum number of OFDM symbols of the CSI-RS mapping.
32. The CSI-RS configuration apparatus of claim 29, further comprising:
a port number informing module, adapted to inform the user equipment of the number of antenna ports of the CSI-RS, so that the user equipment measures each antenna port to obtain the received power of each narrow beam based on the number of antenna ports of the CSI-RS, and determines the antenna port of the CSI-RS corresponding to the narrow beam with the strongest received power;
and the receiving module is suitable for receiving the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power fed back by the user equipment.
33. The apparatus of claim 29, wherein a group of narrow beams corresponding to the CSI-RS and a wide beam corresponding to the synchronization signal block have a beam bonding relationship therebetween.
34. The CSI-RS configuration apparatus of claim 29, wherein the index information of the synchronization signal block is signaled to the ue through a MAC PDU.
35. The CSI-RS configuration apparatus of claim 34, wherein the index information of the synchronization signal block is signaled to the ue through a MAC PDU corresponding to a random access response.
36. The CSI-RS configuration apparatus of claim 29, wherein the index information of the synchronization signal block is signaled to the ue through RRC signaling.
37. The CSI-RS configuration apparatus of claim 29, wherein the index information of the synchronization signal block is signaled to the ue through a master information block or remaining minimum system information within a physical broadcast channel.
38. The apparatus of claim 29, wherein the index information is selected from a set of indices of possible transmitted synchronization signal blocks.
39. The apparatus of claim 38, wherein the index information is selected from a set of indices of a real transmitted synchronization signal block.
40. The apparatus of claim 29, wherein the CSI-RS is located in a same symbol as a secondary synchronization signal in the synchronization signal block.
41. The apparatus of claim 29, wherein the CSI-RS mapping is located in the same two symbols as a secondary synchronization signal and a primary synchronization signal within the synchronization signal block.
42. The CSI-RS configuration apparatus of claim 29, further comprising:
an activation informing module adapted to inform the user equipment through a MAC CE whether the CSI-RS is activated or deactivated.
43. An apparatus for CSI-RS configuration, comprising:
the index information receiving module is suitable for receiving the index information of the synchronous signal block from the base station;
a location determination module adapted to determine a time-frequency location of the CSI-RS based on the index information;
and the index information of the synchronization signal block and the time-frequency position of the CSI-RS have a predefined corresponding relation.
44. The apparatus of claim 43, wherein the index information of the synchronization signal block having a predefined correspondence with the time-frequency location of the CSI-RS comprises: the index information of one or more synchronization signal blocks corresponds to the time-frequency position of the CSI-RS of one cell level.
45. The CSI-RS configuration apparatus of claim 43, further comprising:
a symbol number receiving module adapted to receive log from the base station2S bits for indicating the number of OFDM symbols mapped by the CSI-RS;
wherein S is used to represent the maximum number of OFDM symbols of the CSI-RS mapping.
46. The CSI-RS configuration apparatus of claim 43, further comprising:
a port number receiving module adapted to receive the number of antenna ports of the CSI-RS from the base station;
the power measurement module is suitable for measuring each antenna port to obtain the receiving power of each narrow beam based on the number of the antenna ports of the CSI-RS, and determining the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power;
and the feedback module is suitable for feeding back the number of the antenna port of the CSI-RS corresponding to the narrow beam with the strongest receiving power to the base station.
47. The apparatus of claim 43, wherein a group of narrow beams corresponding to the CSI-RS has a beam-bonding relationship with a wide beam corresponding to the synchronization signal block.
48. The CSI-RS configuration apparatus of claim 43, wherein the index information of the synchronization signal block is sent by the base station through MAC PDU.
49. The CSI-RS configuration apparatus of claim 48, wherein the index information of the synchronization signal block is sent by the base station through a MAC PDU corresponding to a random access response.
50. The CSI-RS configuration apparatus of claim 43, wherein the index information of the synchronization signal block is sent by the base station through RRC signaling.
51. The CSI-RS configuration apparatus of claim 43, wherein the index information of the synchronization signal block is sent by the base station through a master information block or remaining minimum system information within a physical broadcast channel.
52. The apparatus of claim 43, wherein the index information is selected from a set of indices of possible transmitted synchronization signal blocks.
53. The apparatus of claim 52, wherein the index information is selected from a set of indices of a real transmitted synchronization signal block.
54. The apparatus of claim 43, wherein the CSI-RS is located in a same symbol as a secondary synchronization signal in the synchronization signal block.
55. The apparatus of claim 43, wherein the CSI-RS mapping is in the same two symbols as a secondary synchronization signal and a primary synchronization signal within the synchronization signal block.
56. The CSI-RS configuration apparatus of claim 43, further comprising:
an activation receiving module adapted to receive from the base station through a MAC CE whether the CSI-RS is activated or deactivated.
57. A computer readable storage medium having computer instructions stored thereon, wherein the computer instructions when executed perform the steps of the CSI-RS configuration method of any of claims 1 to 14.
58. A computer readable storage medium having computer instructions stored thereon, wherein the computer instructions when executed perform the steps of the CSI-RS configuration method of any of claims 15 through 28.
59. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the CSI-RS configuration method of any of claims 1 to 14.
60. A user equipment comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the CSI-RS configuration method of any of claims 15 to 28.
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