CN104052532A - Method and apparatus for sending radio channel reference signals - Google Patents

Method and apparatus for sending radio channel reference signals Download PDF

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Publication number
CN104052532A
CN104052532A CN201310084323.9A CN201310084323A CN104052532A CN 104052532 A CN104052532 A CN 104052532A CN 201310084323 A CN201310084323 A CN 201310084323A CN 104052532 A CN104052532 A CN 104052532A
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csi
configuration
terminal
field
cycle
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CN201310084323.9A
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CN104052532B (en
Inventor
李子荣
李儒岳
陈艺戬
肖华华
李永
杨勋
朱登魁
徐俊
鲁照华
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2013/090168 priority patent/WO2014139303A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • 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
    • 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
    • H04B7/0684—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 using different training sequences per antenna

Abstract

The invention discloses a method for sending radio channel reference signals. The method comprises: a network side determining and generating a terminal to carry out a set of or more sets of CRI-RS configuration used for CSI measurement, and notifying each set of CRI-RS configuration to the terminal through an RRC signaling; and the network side, according to each set of CRI-RS configuration, sending corresponding one or more CRI-RS to the terminal. The invention further discloses an apparatus for sending radio channel reference signals. Through the method and apparatus, the cost for signal measurement can be reduced.

Description

A kind of sending method of wireless channel reference signal and device
Technical field
The present invention relates to wireless communication technique field, refer to especially a kind of sending method and device of wireless channel reference signal.
Background technology
At city wireless data focus, in shopping center, Applied in Business Pedestrian Street, stadiums, because flow of the people is large, the wireless access of prior art is experienced poor.For this reason, prior art has proposed a kind of multi-antenna technology, can effectively improve channel capacity, promotes user and experiences.
But, in the time that number of antennas is more, if use orthogonal frequency division multiplexi and traditional channel estimation technique, subcarrier that measuring-signal takies is more, it is more to carry out the needed reference signal of channel estimating, for example, for the aerial array of a M × N, only have M antenna port of horizontal direction adjustable, therefore, while carrying out channel estimating, can only use a set of reference signal configuration to carry out wave beam adjustment for horizontal direction, have M antenna port just need to send the reference signal of M antenna port, expense is larger, has had a strong impact on the spectrum efficiency of system.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of sending method and device of wireless channel reference signal, to reduce measuring-signal expense.
For achieving the above object, technical scheme of the present invention is achieved in that
The application provides the sending method of a kind of wireless channel reference signal RS, and the method comprises:
Network side is determined and is generated terminal and carries out one or more sets CSI-RS configurations that channel condition information CSI measurement uses, every cover CSI-RS configuration is passed through to radio resource control RRC signaling to terminal, and send corresponding one or more CSI-RS according to every cover CSI-RS configuration to terminal.
In described CSI-RS configuration, at least comprise following field: antenna port is counted antennaPortsCount, resource distribution resourceConfig and CSI-RS configuration identifier CSI-RS-ID.
Described network side determines that one or more CSI-RS that terminal uses are during for cycle CSI-RS, and every cover CSI-RS that described one or more cycle CSI-RS of generation are corresponding configures and also comprises field: sub-frame configuration subframeConfig;
The value of described subframeConfig field is arranged by network side, according to the value of described subframeConfig field, determines the transmission cycle of described one or more cycle CSI-RS and sends subframe;
Network side is according to the described transmission cycle and send subframe to the described one or more cycle CSI-RS of terminal transmission.
In the time that network side determines and generate that the transmission cycles of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration in 2 cover CSI-RS whens configuration that terminal is used and described at least two cover CSI-RS configurations are N times of one or more cycle CSI-RS corresponding to a CSI-RS configuration, described the 2nd CSI-RS configuration also comprises field: CSI-RS cycle CSI_RS_Period;
It is N times that a CSI-RS configures corresponding one or more cycle CSI-RS that described field CSI_RS_Period indicates the transmission cycle of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration.
Described network side determines that one or more CSI-RS that terminal uses are for aperiodic is when CSI-RS, and every cover CSI-RS corresponding to described one or more CSI-RS aperiodic of generation configures and also comprise: field dciSubframeOffset;
The time delay of the DCI signaling received of relative terminal the last time of transmission subframe of described field dciSubframeOffset instruction described one or more aperiodic of CSI-RS.
In the time that network side determines that terminal is used at least two cover CSI-RS configurations, generate in every cover CSI-RS configuration and also comprise: field CSI-RS configuration tricks CSI-RS-Sequence;
Described field CSI-RS-Sequence indicating terminal carries out the tricks of the CSI-RS configuration that CSI measurement uses.
Described field CSI-RS-Sequence takies 1 bit, corresponding value is set and is designated as the CSI-RS configuration that 2 CSI-RS-ID of use are corresponding; Or, be designated as and use 4 CSI-RS configurations that CSI-RS-ID is corresponding.
Described CSI-RS configuration also comprises field Resource Unit ResourceZone;
The frequency resource position that described field ResourceZone instruction is used while sending corresponding one or more CSI-RS.
When described field ResourceZone takies 2 bits, corresponding value is set and is designated as the 1st bandwidth subset of use, or, be designated as and use the 2nd bandwidth subset, or, be designated as and use the 3rd bandwidth subset, or, be designated as and use the 4th bandwidth subset;
When described field ResourceZone takies 4 bits, described 4 bits are designated as the 1st to the 4th bandwidth subset from high to low successively, and each bit arranges corresponding value and is designated as use or do not use.
Network side is by every cover CSI-RS configuration notification to before terminal, and the method also comprises: network side configures according to CSI-RS, sends corresponding DCI signaling to terminal, wherein carries field CSI request;
Described network side by described field CSI request notification terminal sense cycle or aperiodic CSI-RS carry out CSI measurement.
In the time that terminal has a descending network equipment to serve for it incessantly, described field CSI request uses 3 bits; Otherwise use 2 bits;
When described field CSI request uses 3 bits, corresponding value is set and is designated as:
Terminal does not trigger CSI report aperiodic, utilizes the CSI-RS in cycle to carry out CSI measurement; Or,
Terminal utilizes cycle CSI-RS to the current report of the base station for its service CSI aperiodic; Or,
Terminal utilizes cycle CSI-RS to the 1st serving BS set report CSI aperiodic; Or,
Terminal utilizes cycle CSI-RS to the 2nd serving BS set report CSI aperiodic; Or,
Terminal utilizes aperiodic CSI-RS to current base station report CSI aperiodic for its service; Or,
Terminal utilizes aperiodic CSI-RS to the 1st serving BS set report CSI aperiodic; Or,
Terminal utilizes aperiodic CSI-RS to the 2nd serving BS set report CSI aperiodic;
When described field CSI request uses 2 bits, corresponding value is set and is designated as:
Terminal does not trigger CSI report aperiodic, and only utilizes the CSI-RS in cycle to carry out CSI measurement; Or,
Terminal triggers CSI report aperiodic, utilizes the CSI-RS in cycle to carry out CSI measurement; Or,
Terminal triggers CSI report aperiodic, and utilizes aperiodic CSI-RS to carry out CSI measurement.
The present invention also provides a kind of dispensing device of wireless channel reference signal, comprising:
Analysis module, carries out for definite terminal one or more sets CSI-RS that channel condition information CSI measurement is used;
Configuration module, for generating described one or more sets CSI-RS configurations;
Sending module, for passing through radio resource control RRC signaling to terminal by every cover CSI-RS configuration; And send corresponding one or more CSI-RS according to every cover CSI-RS configuration to terminal.
Described configuration module, also at least arranging following field in the every cover CSI-RS configuration generating: antenna port is counted antennaPortsCount, resource distribution resourceConfig and CSI-RS configuration identifier CSI-RS-ID.
Described configuration module, determine that at described analysis module one or more CSI-RS that terminal uses during for cycle CSI-RS, also configure field sub-frame configuration subframeConfig is set for every cover CSI-RS corresponding to the described one or more cycle CSI-RS generating; The transmission cycle of the described one or more cycle CSI-RS of described field subframeConfig instruction and transmission subframe;
Accordingly, described sending module, also for sending described one or more cycle CSI-RS according to described transmission cycle and transmission subframe to terminal.
Described configuration module, in the time that described analysis module determines that the transmission cycle of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration during terminal is used at least two cover CSI-RS configurations and described at least two cover CSI-RS configurations is N times of one or more cycle CSI-RS corresponding to a CSI-RS configuration, also for field CSI-RS cycle CSI_RS_Period being set in the 2nd CSI-RS configuration generating; It is N times that a CSI-RS configures corresponding one or more cycle CSI-RS that described field CSI_RS_Period indicates the transmission cycle of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration.
Described configuration module, determine that at described analysis module one or more CSI-RS that terminal uses, for aperiodic is when CSI-RS, also configures field dciSubframeOffset is set for every cover CSI-RS corresponding to described one or more CSI-RS aperiodic generating; The time delay of the DCI signaling received of relative terminal the last time of transmission subframe of described field dciSubframeOffset instruction described one or more aperiodic of CSI-RS.
Described configuration module, in the time that described analysis module determines that terminal is used at least two cover CSI-RS, also for field CSI-RS configuration tricks CSI-RS-Sequence being set in the every cover CSI-RS configuration generating; Described field CSI-RS-Sequence indicating terminal carries out the tricks of the CSI-RS configuration that CSI measurement uses.
Described configuration module, also for arranging field ResourceZone in the every cover CSI-RS configuration generating; The frequency resource position that described field ResourceZone instruction is used while sending corresponding one or more CSI-RS.
Described sending module, also for by every cover CSI-RS configuration notification to terminal before, according to CSI-RS configuration, send corresponding DCI signaling to terminal, by the field CSI request notification terminal sense cycle in described DCI signaling or aperiodic CSI-RS carry out CSI measurement.
The sending method of wireless channel reference signal of the present invention and device, determine and generate terminal by network side and carry out one or more sets CSI-RS that CSI measurement uses and configure, every cover CSI-RS configuration is passed through to RRC signaling to terminal, and send corresponding one or more CSI-RS according to every cover CSI-RS configuration to terminal.In such scheme, by many cover CSI-RS Configurations respectively vertical and horizontal direction are carried out to wave beam adjustment, increased the antenna gain of vertical direction; In addition, one or more reference signals that every cover CSI-RS configuration is corresponding, for the aerial array of M × N, this mode also avoids using M × N reference signal, has reduced expense.
Brief description of the drawings
The sending method schematic flow sheet of Fig. 1 wireless channel reference signal of the present invention;
Fig. 2 is the topological structure schematic diagram of 8 × 8 aerial array;
The reference signal transmission timing figure mono-that Fig. 3 provides for the embodiment of the present invention;
The reference signal transmission timing figure bis-that Fig. 4 provides for the embodiment of the present invention;
The reference signal transmission timing figure tri-that Fig. 5 provides for the embodiment of the present invention;
Fig. 6 is the port organization schematic diagram of 8 × 8 aerial array;
The dispensing device structural representation of Fig. 7 wireless channel reference signal of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the present invention is further elaborated.
The sending method of wireless channel reference signal of the present invention, as shown in Figure 1, comprising:
Step 101, network side is determined and is generated terminal and carries out one or more sets CSI-RS configurations that CSI measurement uses;
Step 102, network side passes through RRC signaling to terminal by every cover CSI-RS configuration;
Step 103, network side sends corresponding one or more CSI-RS according to every cover CSI-RS configuration to terminal.
In the present invention, a set of CSI-RS configuration at least comprises following field: antenna port number (antennaPortsCount), resource distribution (resourceConfig) and CSI-RS configuration identifier (CSI-RS-ID).It is to be noted, the number that every cover CSI-RS configures corresponding CSI-RS is indicated by antennaPortsCount, in embodiments of the present invention, network side can arrange according to practical application the value of antennaPortsCount, if the maximum of antenna port number is M, the value of the antennaPortsCount of embodiment of the present invention setting is less than or equal to M so.It is the maximum that number that every cover CSI-RS configures corresponding CSI-RS is less than or equal to antenna port number.
Wherein, the antenna port number that field antennaPortsCount instruction CSI-RS takies, has how many antenna port numbers, adopts the CSI-RS of this cover CSI-RS configuration just to have how many; The configuration numbering of the running time-frequency resource position that field resourceConfig instruction CSI-RS takies; The mark of field CSI-RS-ID instruction CSI-RS configuration.
If network side determines that one or more CSI-RS that terminal uses are during for cycle CSI-RS, every cover CSI-RS that one or more cycle CSI-RS of generation are corresponding configures and also comprises field: sub-frame configuration (subframeConfig); The value of subframeConfig field is arranged by network side, according to the value of subffameConfig field, determines the transmission cycle of one or more cycle CSI-RS and sends subframe; Network side sends one or more cycle CSI-RS according to transmission cycle and transmission subframe to terminal.
Further, in the time that network side determines and generate that the transmission cycles of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration in 2 cover CSI-RS whens configuration that terminal is used and at least two cover CSI-RS configurations are N times of one or more cycle CSI-RS corresponding to a CSI-RS configuration, the 2nd CSI-RS configuration also comprises field: CSI-RS cycle CSI_RS_Period;
It is N times that a CSI-RS configures corresponding one or more cycle CSI-RS that field CSI_RS_Period indicates the transmission cycle of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration.
If network side determines that one or more CSI-RS that terminal uses are for aperiodic is when CSI-RS, every cover CSI-RS corresponding to one or more CSI-RS aperiodic of generation configures and also comprises: field dciSubframeOffset; Field dciSubframeOffset indicates the time delay of the DCI signaling that relative terminal the last time of transmission subframe of one or more aperiodic of CSI-RS receives.
Further, though cycle or aperiodic CSI-RS, corresponding CSI-RS configuration also comprises field CSI-RS configuration tricks (CSI-RS-Sequence) and/or Resource Unit (ResourceZone); Wherein:
In the time that network side determines that terminal is used at least two cover CSI-RS configurations, generate in every cover CSI-RS configuration and also comprise: field CSI-RS configuration tricks CSI-RS-Sequence; Field CSI-RS-Sequence indicating terminal carries out the tricks of the CSI-RS configuration that CSI measurement uses.
The frequency resource position that field ResourceZone instruction is used while sending corresponding one or more CSI-RS.
Further, network side is by every cover CSI-RS configuration notification to before terminal, and the method also comprises: network side configures according to CSI-RS, sends corresponding DCI signaling to terminal, wherein carries field CSIrequest;
Network side by field CSI request notification terminal sense cycle or aperiodic CSI-RS carry out CSI measurement.
Total upper, the field that the final CSI-RS configuration packet generating of network side contains has following situation:
Cycle CSI-RS configuration packet is containing following field: antennaPortsCount and resourceConfig and CSI-RS-ID and subframeConfig; Further, can also comprise field: CSI_RS_Period and/or CSI-RS-Sequence and/or ResourceZone;
Aperiodic, CSI-RS configuration packet was containing following field: antennaPortsCount and resourceConfig and CSI-RS-ID and dciSubframeOffset; Further, can also comprise field: CSI-RS-Sequence and/or ResourceZone.
For the CSI-RS configuration of above-mentioned cycle or aperiodic, network side to before terminal, also needs every cover CSI-RS configuration notification to send corresponding DCI signaling to terminal, wherein carries field CSI request; This field CSI request for notification terminal sense cycle or aperiodic CSI-RS carry out CSI measurement.
Below by specific embodiment, implication and the function of each field in CSI-RS configuration are described.In embodiments of the present invention, by above-mentioned network side taking base station as example describes.
Embodiment mono-
If base station has 8 × 8=64 can control phase and the bay of amplitude, all array element, in a plane, as shown in Figure 2, forms the aerial array of 8 × 8.
For the aerial array of a M × N, in prior art, only have M the antenna port (each antenna port comprises N array element) of horizontal direction adjustable, therefore existing terminal is only supported a set of CSI-RS configuration, correspondingly, use a set of CSI-RS corresponding with this cover CSI-RS configuration (to comprise M CSI-RS, in the M of a horizontal direction antenna port, a CSI-RS of each antenna port transmitting, the configuration of this M CSI-RS is identical) carry out CSI measurement.In order to adjust better the wave beam of aerial array formation, can adjust the wave beam of vertical direction and horizontal direction simultaneously.In addition, because existing LTE/LTE-A standard is only supported maximum 8 antenna ports (the corresponding multiple bays of each antenna port), therefore, in this embodiment, for the wave beam that makes this aerial array of 8 × 8 is adjusted with horizontal direction in the vertical direction simultaneously, 64 bays are divided into 8 antenna ports (as shown in Figure 2 with vertical direction respectively in the horizontal direction, the antenna port of vertical direction is 1 to 8, the antenna port of horizontal direction is 9 to 16), accordingly, need to adopt two cover CSI-RS configurations, all corresponding maximum 8 CSI-RS of every cover CSI-RS configuration.
In this embodiment, suppose that base station determines that it is cycle CSI-RS that terminal is carried out the CSI-RS that CSI measurement uses.A set of CSI-RS configuration (being assumed to be CSI-RS configuration 1) that cycle CSI-RS is corresponding at least comprises following field: antennaPortsCount and resourceConfig and CSI-RS-ID and subframeConfig.One or more CSI-RS that this cover CSI-RS configures 1 correspondence all send according to CSI-RS configuration 1.Wherein, antennaPortsCount is antenna port number, has indicated this cover CSI-RS to configure the number of corresponding CSI-RS; CSI-RS-ID has indicated the mark of this cover CSI-RS configuration; ResourceConfig is existing field, repeats no more herein.
Wherein, can determine the transmission cycle of CSI-RS and send subframe by field subframeConfig.The value of field subframeConfig is arranged by base station, is the relevant configuration of field subframeConfig as shown in Table 1 and Table 2.
Table 1
Table 2
I in table 1 and table 2 cSI-RS1the value that represents field subframeConfig, is arranged by base station.Work as I cSI-RS1during for odd number, algorithm shown in employing table 1 determines that CSI-RS configures transmission cycle (Periodicity) and the transmission subframe (convenient for subsequent descriptions, to configure for 1 transmission cycle and send subframe referred to as CSI-RS) of all CSI-RS of 1 correspondence.Work as I cSI-RS1during for even number, the algorithm shown in employing table 2 is determined the transmission cycle of CSI-RS configuration 1 and is sent subframe.Wherein, I cSI-RS1represent the numerical value in transmission cycle; Δ cSI-RS1represent the numerical value of sub-frame offset.
Know I cSI-RS1after, question blank 1 or table 2 can be known the transmission cycle T of CSI-RS configuration 1 cSI-RS1; Need to be according to T and send subframe cRS-RSand Δ cRS-RS, determine by following formula: wherein, n frepresent that CSI-RS configures the serial number of all CSI-RS place frame of 1 correspondence, is notified n to terminal by base station s∈ 0,1,2 ..., 19} represents all CSI-RS that CSI-RS configures 1 correspondence time-slot sequence (slot number) in frame, wherein, be illustrated in subframe in frame numbering (subframe is containing two time slots), for sending the subframe numbers of subframe.
For example, the subframeConfig of the CSI-RS configuration 1 that base station arranges is 10 o'clock, known according to table 1: the transmission cycle of CSI-RS configuration 1 is 10 subframes, sub-frame offset is 5, and its implication is: the 5th moment that subframe is corresponding taking 10 subframes as a transmission cycle, in these 10 subframes sends this CSI-RS and configure all CSI-RS of 1 correspondence.Further, calculate the subframe numbers of this 5th subframe according to above-mentioned formula.
Situation for adopting two cover CSI-RS configurations (CSI-RS configuration 1 and CSI-RS configuration 2):
If when base station is provided with respectively the subframeConfig of CSI-RS configuration 1 and CSI-RS configuration 2, determines the transmission cycle of CSI-RS configuration 1 and CSI-RS configuration 2 and send subframe according to table 1 or table 2.
If be provided with the subframeConfig of CSI-RS configuration 1 in base station, simultaneously, the transmission cycle of base station notification terminal CSI-RS configuration 2 is while being N times (N is positive integer) in transmission cycle of CSI-RS configuration 1, in CSI-RS configuration 2, also comprise field CSI_RS_Period so, base station is indicated N by this field to terminal.In such cases, the transmission cycle of CSI-RS configuration 1 and transmission subframe are determined by table 1 or table 2; The transmission cycle of CSI-RS configuration 2 and transmission subframe are to configure for 1 transmission cycle and send subframe based on CSI-RS to determine, preferably, definite by the algorithm of table 3.
Table 3
Wherein, I cRS-RS2for the value of field subframeconfig in CSI-RS configuration 2, in the time that the transmission cycle of CSI-RS configuration 2 is N times (N is positive integer) in transmission cycle of CSI-RS configuration 1, preferably, base station is by I cRS-RS2be set to ± 1 (be not limited in ± 1); T cSI-RS2for the transmission cycle of CSI-RS configuration 2, Δ cSI-RS2for the sub-frame offset of CSI-RS configuration 2.G cRS-RS1=1, represent that CSI-RS configures resource that all CSI-RS of 1 correspondence take within a transmission cycle 1 subframe; If G cRS-RS1=2, represent that CSI-RS configures resource that all CSI-RS of 1 correspondence take within a transmission cycle in 2 subframes, by that analogy; And this parameter is arranged by network side and terminal, and not by signaling terminal.
Especially, I cRS-RS2be fixed as-1, G cRS-RS1=1 o'clock, table 3 can develop into table 4:
Table 4
Especially, I cSI-RS2be fixed as 1, G cRS-RS1=1 o'clock, table 3 can develop into table 5:
Table 5
T in table 3, table 4 and table 5 cSI-RS2and Δ cSI-RS2meet following constraints:
calculate within each transmission cycle the transmission subframe of CSI-RS configuration 2 by this formula.
For example: in the CSI-RS configuration 1 that base station arranges, the value of field subframeConfig is 5; In CSI-RS configuration 2, the value of field subframeConfig is 75, can determine that according to table 2 the transmission cycle of CSI-RS configuration 1 is 10 subframes, sub-frame offset is 0, taking 10 subframes as a transmission cycle, within a transmission cycle, configure all CSI-RS of 1 correspondence at the 0th moment that subframe is corresponding transmission CSI-RS of these 10 subframes; It is 80 subframes that CSI-RS configured for 2 transmission cycles, and sub-frame offset is 0, taking 80 subframes as a transmission cycle, configures all CSI-RS of 2 correspondences within a transmission cycle at the 0th moment that subframe is corresponding transmission CSI-RS of these 80 subframes.
Again for example: in the CSI-RS configuration 1 that base station arranges, the value of field subframeConfig is 5, meanwhile, base station is also that 8 times of CSI-RS configuration 1 and base station send to subframeConfig=1 in the CSI-RS configuration 2 of terminal to the transmission cycle of terminal notice CSI-RS configuration 2.Can determine that according to table 2 the transmission cycle of CSI-RS configuration 1 is 10 subframes, sub-frame offset is 0, taking 10 subframes as a transmission cycle, within a transmission cycle, configure all CSI-RS of 1 correspondence at the 0th moment that subframe is corresponding transmission CSI-RS of these 10 subframes; If G cRS-RS1=1, known according to table 5, it is 80 subframes that CSI-RS configured for 2 transmission cycles, and sub-frame offset is 1.
In the present embodiment, suppose the transmission timing of the reference signal definite according to the field subframeConfig of the field subframeConfig of CSI-RS configuration 1 and CSI-RS configuration 2 as shown in Figure 3, process of transmitting comprises:
Step S210, base station sends CSI-RS configuration 1 and CSI-RS configuration 2 by RRC signaling to terminal.
Step S220, according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, base station is used 8 antenna ports to configure all CSI-RS (i.e. 8 CSI-RS) of 2 correspondences to terminal transmission CSI-RS in moment corresponding to subframe t1; Terminal is according to the field subframeConfig in CSI-RS configuration 2, configure all CSI-RS of 2 correspondences at moment detection CSI-RS corresponding to subframe t1, after detecting, carry out channel condition information (CSI) and measure, and the information measuring is fed back to base station.
Step S230, according to the field subframeConfig in CSI-RS configuration 1, base station is used 8 antenna ports to configure all CSI-RS (i.e. 8 CSI-RS) of 1 correspondence to terminal transmission CSI-RS in moment corresponding to subframe t2; Terminal is according to the field subframeConfig in CSI-RS configuration 1, and all CSI-RS that configure 1 correspondence at moment detection CSI-RS corresponding to subframe t2 carry out CSI measurement, and the information measuring is fed back to base station after detecting.
Step S240, according to the field subframeConfig in CSI-RS configuration 1, base station is used 8 antenna ports to configure all CSI-RS (i.e. 8 CSI-RS) of 1 correspondence to terminal transmission SI-RS in moment corresponding to subframe t3; Terminal is according to the field subframeConfig in CSI-RS configuration 1, and all CSI-RS that configure 1 correspondence at moment detection CSI-RS corresponding to subframe t3 carry out CSI measurement, and the information measuring is fed back to base station after detecting.
So far, CSI-RS configuration 1 and CSI-RS configure a transmission end cycle of the reference signal of 2 correspondences.The next transmission cycle, while beginning, repeats above-mentioned steps S220-S240.
It is pointed out that if 8 antenna ports of base station usage level direction configure the reference signal of 2 correspondences to terminal transmission CSI-RS, use so 8 antenna ports of vertical direction to configure the reference signal of 1 correspondence to terminal transmission CSI-RS; Otherwise also can.
In addition, whether adopt 8 antenna ports to be arranged by base station, the antenna port of CSI-RS configuration 1 and CSI-RS configuration 2 employing varying numbers also can be set.
Embodiment bis-
In this embodiment, the reference signal that CSI-RS configuration 1 and CSI-RS configure 2 correspondences is cycle CSI-RS.The transmission cycle of supposing CSI-RS configuration 2 is N times of CSI-RS configuration 1, if N is larger, this kind of situation is considered as to the scene of the semi-static adjustment wave beam of vertical direction, and the present embodiment is mainly for the scene of the semi-static adjustment wave beam of vertical direction.In the present embodiment, N is set to 3, i.e. the transmission cycle of CSI-RS configuration 1 is CSI-RS configuration 13 times, as shown in Figure 4, process of transmitting is as follows for the transmission timing of CSI-RS configuration 1 and CSI-RS configuration 2:
Step S310, base station sends CSI-RS configuration 1 and CSI-RS configuration 2 by RRC signaling to terminal.
Step S320, according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, base station configures all CSI-RS of 2 correspondences to terminal transmission CSI-RS in moment corresponding to subframe t1; Terminal is according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, and all CSI-RS that configure 2 correspondences at moment detection CSI-RS corresponding to subframe t1 carry out CSI measurement, and the information measuring is fed back to base station after detecting.
Step S330, according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, base station configures all CSI-RS of 1 correspondence to terminal transmission CSI-RS in moment corresponding to subframe t2; Terminal is according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, and all CSI-RS that configure 1 correspondence at moment detection CSI-RS corresponding to subframe t2 carry out CSI measurement, and the information measuring is fed back to base station after detecting.
Step S340, according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, base station configures all CSI-RS of 1 correspondence to terminal transmission CSI-RS in moment corresponding to subframe t3; Terminal is according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, and all CSI-RS that configure 1 correspondence at moment detection CSI-RS corresponding to subframe t3 carry out CSI measurement, and the information measuring is fed back to base station after detecting.
Step S350, according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, base station configures all CSI-RS of 1 correspondence to terminal transmission CSI-RS in moment corresponding to subframe t4; Terminal is according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, and all CSI-RS that configure 1 correspondence at moment detection CSI-RS corresponding to subframe t4 carry out CSI measurement, and the information measuring is fed back to base station after detecting.
So far, CSI-RS configuration 1 and CSI-RS configure transmission end cycle of reference signal of 2 correspondences.The next transmission cycle, while beginning, repeats above-mentioned steps S320-S350.
Embodiment tri-
In this embodiment, the reference signal that CSI-RS configuration 1 and CSI-RS configure 2 correspondences is cycle CSI-RS.The object of the present embodiment is the expense that sends CSI-RS in order to reduce, for this reason, in the time that configuring corresponding reference signal, one of them CSI-RS of transmission uses part available downstream bandwidth, and configuring corresponding reference signal, another one CSI-RS uses whole available downstream bandwidths, as shown in Figure 5, process of transmitting comprises transmission timing:
Step S410, base station sends CSI-RS configuration 1 and CSI-RS configuration 2 by RRC signaling to terminal, especially, in CSI-RS configuration 2, also comprise that instruction sends CSI-RS and configure the field of the reference signal of 2 correspondences frequency resource position used, indicate by field ResourceZone frequency resource position, and concrete configuration is shown in embodiment five.
Step S420, according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, base station sends CSI-RS and configures all CSI-RS of 2 correspondences to terminal in moment corresponding to subframe t1, the part available downstream bandwidth of indicating by frequency resource position; Terminal is according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, and all CSI-RS that configure 2 correspondences at moment detection CSI-RS corresponding to subframe t1 carry out CSI measurement, and the information measuring is fed back to base station after detecting.
Step S430, according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, base station sends CSI-RS and configures all CSI-RS of 1 correspondence to terminal in moment corresponding to subframe t2, whole available downstream bandwidths of indicating by frequency resource position; Terminal is according to the field subframeConfig in CSI-RS configuration 1 and CSI-RS configuration 2, and all CSI-RS that configure 1 correspondence at moment detection CSI-RS corresponding to subframe t2 carry out CSI measurement, and the information measuring is fed back to base station after detecting.
So far, CSI-RS configuration 1 and CSI-RS configure a transmission end cycle of the reference signal of 2 correspondences.The next transmission cycle, while beginning, repeats above-mentioned steps S420-S430.
Embodiment tetra-
In this embodiment, the reference signal that CSI-RS configuration 1 and CSI-RS configure 2 correspondences is cycle CSI-RS.
In the time that network side determines that terminal is used at least two cover CSI-RS configurations (as two covers, quadruplet), CSI-RS configuration also comprises field CSI-RS-Sequence, is used to indicate the tricks of the CSI-RS configuration of terminal use.Field CSI-RS-Sequence is the expansion to existing CSI-RS configuration.
Field CSI-RS-Sequence takies 1 bit or 2 bits.Illustrate below by specific embodiment.
Implication when field CSI-RS-Sequence takies 1 bit is as shown in table 6:
Binary system Implication
0 Use the CSI-RS configuration that 2 CSI-RS configuration identifiers (CSI-RS-ID) are corresponding
1 Use the CSI-RS configuration that 4 CSI-RS configuration identifiers (CSI-RS-ID) are corresponding
Table 6
Wherein, the corresponding relation between value and the implication of field CSI-RS-Sequence is not limited in shown in table 6.
In the time that the CSI-RS configuration tricks of terminal use is determined in base station, send the CSI-RS configuration of corresponding tricks to terminal, be for example two cover CSI-RS configurations, wherein every CSI-RS-Sequence parameter of overlapping in CSI-RS configuration is all designated as " using 2 CSI-RS configurations that CSI-RS-ID is corresponding ", and in this two cover CSI-RS configuration, the CSI-RS-ID parameter that every cover comprises has been indicated the identification information of this CSI-RS configuration.Concrete will describe by the following examples.
Below in conjunction with table 6 for CSI-RS-Sequence be 0,1 two kind of situation illustrate respectively.
Embodiment tetra--1, if there are 64 physical antennas base station, Fig. 2 is shown in by the topological structure of antenna, use single-polarized antenna, part terminal in connecting system is supported at most the CSI-RS configuration of a set of 8 antenna ports, and all the other terminals can be supported the CSI-RS configuration of 8 antenna ports of two covers, therefore, CSI-RS configuration is overlapped in base station selected use two, and terminal is used this two cover CSI-RS to configure corresponding reference signal to carry out CSI measurement.In the present embodiment, the maximum that every cover CSI-RS configures operable antenna port number (antennaPortsCount) is 8 (being that corresponding CSI-RS number mostly is 8 most).
In this example, suppose that the two cover CSI-RS configurations that base station determines that terminal need to be used are respectively CSI-RS configuration 0 and CSI-RS configuration 1.
If CSI-RS configures all CSI-RS of 0 correspondence by antenna port 1～8 transmitting, the partial content of the CSI-RS configuration 0 that base station sends to terminal by RRC signaling is as follows:
antennaPortsCount＝8，resourceConfig＝1，subframeConfig＝75，CSI-RS-ID＝0，CSI-RS-Sequence＝0b。
Wherein ' 0b ' represents binary number 0, associative list 6, and the CSI-RS that CSI-RS-Sequence=0b instruction is used is configured to two covers; CSI-RS-ID=0 has indicated the mark of this cover CSI-RS configuration 0.
If CSI-RS configures all CSI-RS of 1 correspondence by antenna port 9～16 transmittings, the partial content of the CSI-RS configuration 1 that base station sends to terminal by RRC signaling is as follows:
antennaPortsCount＝8，resourceConfig＝1，subframeConfig＝75，CSI-RS-ID＝1，CSI-RS-Sequence＝0b。
Wherein ' 0b ' represents binary number 0, associative list 6, and the CSI-RS that CSI-RS-Sequence=0b instruction is used is configured to two covers; CSI-RS-ID=1 has indicated the mark of this cover CSI-RS configuration 1.
Embodiment tetra--2, establishing base station has 64 physical antennas, and Fig. 6 is shown in by the topological structure of antenna, use dual polarized antenna, part terminal in connecting system is supported at most the CSI-RS configuration of a set of 8 antenna ports, and all the other terminals can be supported quadruplet CSI-RS configuration, and every cover configures maximum 8 antenna ports.Therefore, base station selected use quadruplet CSI-RS configuration, terminal is used this quadruplet CSI-RS to configure corresponding reference signal to carry out CSI measurement.In the present embodiment, to configure operable maximum antenna port number (antennaPortsCount) be 8 to every cover CSI-RS.And make following regulation: 1st, 2 cover CSI-RS are configured for the transmitting antenna of measuring first polarised direction to the channel of receiving terminal antenna, the 3rd, 4 cover CSI-RS are configured for the transmitting antenna of measuring second polarised direction to the channel of receiving terminal antenna.
In this example, suppose that the quadruplet CSI-RS configuration that base station determines that terminal need to be used is respectively CSI-RS0 configuration, CSI-RS1 configuration, CSI-RS2 configuration and CSI-RS3 configuration.
If CSI-RS configures all CSI-RS of 0 correspondence by antenna port 1～8 transmitting, the partial content of the CSI-RS1 configuration 0 that base station sends to terminal by RRC signaling is as follows:
antennaPortsCount＝8，resourceConfig＝1，subframeConfig＝75，CSI-RS-ID＝0，C?SI-RS-Sequence＝1b。
Wherein ' 1b ' represents binary number 1, associative list 6, and CSI-RS-Sequence=1b represents that the CSI-RS using is configured to quadruplet; CSI-RS-ID=0 has indicated the mark of this cover CSI-RS configuration 0; It is 8 that antennaPortsCount=8 instruction adopts the CSI-RS of CSI-RS configuration 0.
If CSI-RS configures all CSI-RS of 1 correspondence by antenna port 9～12 transmittings, the partial content of the CSI-RS configuration 1 that base station sends to terminal by RRC signaling is as follows:
antennaPortsCount＝4，resourceConfig＝1，subframeConfig＝75，CSI-RS-ID＝1，CSI-RS-Sequence＝1b。
Wherein 1b represents binary number 1, associative list 6, and the CSI-RS that CSI-RS-Sequence=1b uses is configured to quadruplet; CSI-RS-ID=1 has indicated the mark of this cover CSI-RS configuration 1; It is 4 that antennaPortsCount=4 instruction adopts the CSI-RS of CSI-RS configuration 1.
If CSI-RS configures all CSI-RS of 2 correspondences by antenna port 13～20 transmittings, the partial content of the CSI-RS configuration 2 that base station sends to terminal by RRC signaling is as follows:
antennaPortsCount＝8，resourceConfig＝1，subframeConfig＝75，CSI-RS-ID＝2，CSI-RS-Sequence＝1b。
Wherein 1b represents binary number 1, associative list 6, and CSI-RS-Sequence=1b represents that the CSI-RS using is configured to quadruplet; CSI-RS-ID=2 has indicated the mark of this cover CSI-RS configuration 2; It is 8 that antennaPortsCount=8 instruction adopts the CSI-RS of CSI-RS configuration 2.
If CSI-RS configures all CSI-RS of 3 correspondences by antenna port 21～24 transmittings, the partial content of the CSI-RS configuration 3 that base station sends to terminal by RRC signaling is as follows:
antennaPortsCount＝4，resourceConfig＝1，subframeConfig＝75，CSI-RS-ID＝3，CSI-RS-Sequence＝1b。
Wherein ' 1b ' represents binary number 1, associative list 6, and the CSI-RS that CSI-RS-Sequence=1b uses is configured to quadruplet; CSI-RS-ID=3 has indicated the mark of this cover CSI-RS configuration 3; It is 4 that antennaPortsCount=4 instruction adopts the CSI-RS of CSI-RS configuration 3.
Embodiment tetra--3, in this example, supposes that base station determines that terminal need to be used a set of CSI-RS configuration, is CSI-RS configuration 0.
If CSI-RS configures all CSI-RS of 0 correspondence by antenna port 1～8 transmitting, the partial content of the CSI-RS configuration 0 that base station sends to terminal by RRC signaling is as follows:
antennaPortsCount＝8，resourceConfig＝1，subframeConfig＝5、CSI-RS-ID＝0。In the time not comprising field CSI-RS-Sequence in CSI-RS configuration, think that terminal has only been used a set of CSI-RS configuration.
Embodiment five
In CSI-RS configuration, can also comprise field ResourceZone.Field CSI-RS-Sequence is the expansion to existing CSI-RS configuration, the frequency resource position using while being used to indicate all CSI-RS that send this cover CSI-RS configuration correspondence.Preferably, ResourceZone field takies 2 bits, and its implication is as shown in table 7:
Binary representation Implication
00 Use the 1st bandwidth subset (Bandwidth Part)
01 Use the 2nd bandwidth subset
10 Use the 3rd bandwidth subset
11 Use the 4th bandwidth subset
Table 7
In table 7, each bandwidth subset is made up of multiple RB.The value of ResourceZone field is not limited in shown in table 7 with the corresponding relation of implication.
ResourceZone field can also take four bits, and in such cases, its implication is: existing LTE/LTE-A system is supported at most 4 bandwidth subsets, can use 1 bit to represent a bandwidth subset, this bit is made as at 1 o'clock, represents to use this bandwidth subset, is made as at 0 o'clock and represents not use.If 4 of the bandwidth subset deficiencies of whole bandwidth (such as 5MHz bandwidth only has 2 bandwidth subsets, being 3 when 10MHz bandwidth), are made as 0 by the bit of the bandwidth subset not using.For example: when 20MHz bandwidth, ResourceZone=0110b, if highest order represents the bandwidth subset that frequency is minimum (being made as the 1st), lowest order represents the bandwidth subset that frequency is the highest, represents to use the 2nd, 3 bandwidth subsets; When 10MHz bandwidth, lowest order is fixed as 0, ResourceZone=0110b, represents to use the 2nd, 3 bandwidth subsets; When 5MHz bandwidth, minimum two are fixed as 0, and for example, ResourceZone=0100b, represents to use the 2nd bandwidth subset.
If CSI-RS configures without ResourceZone field, expression can be used whole bandwidth.
If there are 64 physical antennas base station, Fig. 1 is shown in by the topological structure of antenna, use single-polarized antenna, part terminal in connecting system is supported at most the CSI-RS configuration of a set of 8 antenna ports, all the other terminals can be supported the CSI-RS configuration of 8 antenna ports of two covers, therefore, CSI-RS configuration is overlapped in base station selected use two, and terminal is used this two cover CSI-RS to configure corresponding reference signal to carry out CSI measurement.In the present embodiment, to configure operable maximum antenna port number (antennaPortsCount) be 8 to every cover CSI-RS.
Embodiment five-1
This embodiment describes with cycle CSI-RS.
In the present embodiment, suppose that the two cover CSI-RS configurations that base station determines that terminal need to be used are respectively CSI-RS configuration 0 and CSI-RS configuration 1.
Suppose that base station configures all CSI-RS of 0 correspondence to terminal transmission CSI-RS by whole available downstream bandwidths, the partial content of the CSI-RS configuration 0 that base station sends to terminal by RRC signaling is as follows:
antennaPortsCount＝8，resourceConfig＝1，subframeConfig＝75，CSI-RS-ID＝0，CSI-RS-Sequence＝0b。
In this CSI-RS configuration 0, there is no ResourceZone field, all CSI-RS (8) that expression transmission CSI-RS configures 0 correspondence use whole available bandwidths.
Suppose base station by part available downstream bandwidth, for example use the 2nd bandwidth subset to send CSI-RS to terminal to configure all CSI-RS of 1 correspondence, the partial content of the CSI-RS configuration 1 that base station sends to terminal by RRC signaling is as follows:
antennaPortsCount＝8，resourceConfig＝1，subframeConfig＝75，CSI-RS-ID＝1，CSI-RS-Sequence＝0b，ResourceZone＝01b。
Wherein, " 01b " represents binary number 01, associative list 7, and ResourceZone=01b represents to use the 2nd bandwidth subset to send all CSI-RS of configuration 1 correspondence.
Embodiment five-2
This embodiment describes with cycle CSI-RS.
Suppose that base station system bandwidth is 10MHz, the all CSI-RS that configure 0 correspondence by part available downstream bandwidth (the 1st, 2 bandwidth subsets) to terminal transmission CSI-RS, the partial content of the CSI-RS configuration 0 that base station sends to terminal by RRC signaling is as follows:
antennaPortsCount＝8，resourceConfig＝1，subffameConfig＝75，CSI-RS-ID＝0，CSI-RS-Sequence＝0b，ResourceZone＝1100b。(here, field ResourceZone takies four bits)
Wherein, ResourceZone=1100b represents to use the 1st, 2 bandwidth subsets (frequency from low to high), because be 10MHz system bandwidth, therefore lowest order perseverance is 0.
Suppose that base station system bandwidth is 10MHz, the all CSI-RS that configure 1 correspondence by part available downstream bandwidth (the 1st, 2 bandwidth subsets) to terminal transmission CSI-RS, the partial content of the CSI-RS configuration 1 that base station sends to terminal by RRC signaling is as follows:
antennaPortsCount＝8，resourceConfig＝1，subframeConfig＝75，CSI-RS-ID＝1，CSI-RS-Sequence＝0b，ResourceZone＝1100b。
Wherein, ' ResourceZone=1100b represents to use the 1st, 2 bandwidth subsets.(here, field ResourceZone takies four bits)
It is to be noted, in CSI-RS configuration 0 and CSI-RS configuration 1, ResourceZone can adopt different bit configuration, for example, field ResourceZone in CSI-RS configuration 0 can adopt the configuration of two bits, field ResourceZone in CSI-RS configuration 1 can adopt the configuration of four bits, and vice versa.In addition, CSI-RS configuration 1 and CSI-RS configuration 2 can be used identical bandwidth subset, also can use different bandwidth subsets.
Embodiment six
What no matter base station sent to terminal is cycle CSI-RS or aperiodic CSI-RS, sending before CSI-RS, base station sends DCI signaling to terminal.In the present embodiment, base station use the DCI format0A in DCI signaling or the CSI request field notification terminal sense cycle in DCI format4A or aperiodic CSI-RS carry out CSI measurement feedback.
Embodiment six-1
CSI request field takies 2 bits or 3 bits.In the time that terminal has a descending base station to serve for it incessantly, CSI request field is used 3 bits; Otherwise use 2 bits.
When CSI request uses 2 bits, implication is as follows:
Table 10
When CSI request uses 3 bits, implication is as follows:
Table 11
Terminal in the time receiving DCI signaling, according to CSI request field wherein determine base station send be cycle CSI-RS or aperiodic CSI-RS.According to table 10 or table 11, the value of CSI request field is 10 or 100 or 101 or 110 o'clock, and terminal thinks that network side has sent CSI-RS aperiodic; The value of CSI request field is 00 or 01 or 000 or 001 or 010 or 011 o'clock, and terminal thinks that network side has sent cycle CSI-RS.
When transmission cycle CSI-RS, determine the transmission cycle and send subframe according to the field subframeConfig in CSI-RS configuration, terminal detects CSI-RS according to transmission cycle and transmission subframe.Send aperiodic when CSI-RS, detect CSI-RS and only detecting once aperiodic according to the instruction of the field dciSubframeOffset in CSI-RS configuration.
Wherein, the CSI-RS that cycle CSI-RS is corresponding configures as embodiment mono-to five, in the present embodiment, repeats no more.Mainly to CSI-RS aperiodic, corresponding CSI-RS configuration describes the present embodiment.
If there are 32 physical antennas base station, it is 32 that every cover CSI-RS configures operable maximum antenna port number (antennaPortsCount).
When terminal is received after the DCI signaling that contains CSI request field, if the value of CSI request field is 10b, i.e. binary one 0, associative list 10, terminal is used this aperiodic CSI-RS to carry out CSI measurement, and triggers CSI report aperiodic (being that terminal thinks that base station has sent CSI-RS aperiodic).
Accordingly, base station sends aperiodic CSI-RS configuration by RRC signaling to terminal, uses whole bandwidth; The partial content of CSI-RS configuration is as follows:
antennaPortsCount＝32，resourceConfig＝0，dciSubframeOffset＝0，CSI-RS-ID＝0。
It is pointed out that owing to being CSI-RS aperiodic, indicate so the field sub-frame configuration (subframeConfig) of transmission cycle and delivery time not in CSI-RS configuration.In this configuration, do not comprise CSI-RS-Sequence field, represent that terminal has been used a set of CSI-RS configuration.In this configuration, do not comprise ResourceZone field, represent to use whole bandwidth to send all aperiodics of CSI-RS corresponding to this cover CSI-RS configuration.
DciSubframeOffset field, represent the time delay (unit is subframe) of the DCI signaling that contains CSI request field that relative terminal the last time of transmission subframe of CSI-RS receives, equal that 0 expression does not have time delay, terminal is measured CSI-RS aperiodic in DCI signaling place subframe.
Embodiment six-2
When CSI request only uses 2 bits, adopt the configuration of above-mentioned table 10.
This embodiment for aperiodic CSI-RS describe.
When terminal is received after the DCI signaling that contains CSI request field, if the value of CSI request field is 10b, i.e. binary one 0, if terminal is determined the configuration that adopts table 10, terminal triggers CSI report aperiodic so, utilizes aperiodic CSI-RS to carry out CSI measurement (being that terminal thinks that base station has sent aperiodic CSI-RS).
Accordingly, base station sends aperiodic CSI-RS configuration by RRC signaling to terminal, uses whole bandwidth; The partial content of CSI-RS configuration is as follows:
antennaPortsCount＝32，resourceConfig＝0，dciSubframeOffset＝1，CSI-RS-ID＝0。
It is pointed out that owing to being CSI-RS aperiodic, indicate so the field sub-frame configuration (subffameConfig) of transmission cycle and delivery time not in CSI-RS configuration.In this configuration, do not comprise CSI-RS-Sequence field, represent that terminal has been used a set of CSI-RS configuration.In this configuration, do not comprise ResourceZone field, represent to use whole bandwidth to send CSI-RS.
DciSubframeOffset, represent the time delay (unit is subframe) of the DCI signaling place subframe that contains CSI request field that relative terminal the last time of transmission subframe of CSI-RS receives, equal 1 expression terminal the next subframe of DCI signaling place subframe is carried out to CSI-RS measurement aperiodic.
In order to realize the sending method of above-mentioned reference signal, the embodiment of the present invention is also carried the dispensing device that has encircleed a kind of wireless channel reference signal, and this application of installation is in network equipment, and preferably, this network equipment is base station, and as shown in Figure 7, this device comprises:
Analysis module 10, carries out for definite terminal one or more sets CSI-RS that channel condition information CSI measurement is used;
Configuration module 20, for generating one or more sets CSI-RS configurations;
Sending module 30, for passing through radio resource control RRC signaling to terminal by every cover CSI-RS configuration; And send corresponding one or more CSI-RS according to every cover CSI-RS configuration to terminal.
Preferably, configuration module 20, also at least arranging following field in the every cover CSI-RS configuration generating: antenna port is counted antennaPortsCount, resource distribution resourceConfig and CSI-RS configuration identifier CSI-RS-ID.
Preferably, configuration module 20, in the time that analysis module 10 determines that one or more CSI-RS that terminal uses are for cycle CSI-RS, also configure field sub-frame configuration subffameConfig is set for every cover CSI-RS corresponding to the one or more cycle CSI-RS generating; Field subframeConfig indicates the transmission cycle of one or more cycle CSI-RS and sends subframe;
Accordingly, sending module 30, also for sending one or more cycle CSI-RS according to transmission cycle and transmission subframe to terminal.
Preferably, configuration module 20, in the time that analysis module 10 determines that the transmission cycle of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration during terminal is used at least two cover CSI-RS configurations and at least two cover CSI-RS configurations is N times of one or more cycle CSI-RS corresponding to a CSI-RS configuration, also for field CSI-RS cycle CSI_RS_Period being set in the 2nd CSI-RS configuration generating; It is N times that a CSI-RS configures corresponding one or more cycle CSI-RS that field CSI_RS_Period indicates the transmission cycle of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration.
Preferably, configuration module 20, determine that at analysis module 10 one or more CSI-RS that terminal uses, for aperiodic is when CSI-RS, also configures field dciSubframeOffset is set for every cover CSI-RS corresponding to one or more CSI-RS aperiodic generating; Field dciSubframeOffset indicates the time delay of the DCI signaling that relative terminal the last time of transmission subframe of one or more aperiodic of CSI-RS receives.
Preferably, configuration module 20, in the time that analysis module 10 determines that terminal is used at least two cover CSI-RS, also for field CSI-RS configuration tricks CSI-RS-Sequence being set in the every cover CSI-RS configuration generating; Field CSI-RS-Sequence indicating terminal carries out the tricks of the CSI-RS configuration that CSI measurement uses.
Preferably, configuration module 20, also for arranging field ResourceZone in the every cover CSI-RS configuration generating; The frequency resource position that field ResourceZone instruction is used while sending corresponding one or more CSI-RS.
Preferably, sending module 30, also for by every cover CSI-RS configuration notification to terminal before, configure according to CSI-RS, send corresponding DCI signaling to terminal, by the field CSIrequest notification terminal sense cycle in DCI signaling or aperiodic CSI-RS carry out CSI measurement.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.

Claims (19)

1. a sending method of wireless channel reference signal RS, is characterized in that, the method comprises:
Network side is determined and is generated terminal and carries out one or more sets CSI-RS configurations that channel condition information CSI measurement uses, every cover CSI-RS configuration is passed through to radio resource control RRC signaling to terminal, and send corresponding one or more CSI-RS according to every cover CSI-RS configuration to terminal.
2. the sending method of wireless channel reference signal according to claim 1, it is characterized in that, in described CSI-RS configuration, at least comprise following field: antenna port is counted antennaPortsCount, resource distribution resourceConfig and CSI-RS configuration identifier CSI-RS-ID.
3. the sending method of wireless channel reference signal according to claim 2, it is characterized in that, described network side determines that one or more CSI-RS that terminal uses are during for cycle CSI-RS, and every cover CSI-RS that described one or more cycle CSI-RS of generation are corresponding configures and also comprises field: sub-frame configuration subframeConfig;
The value of described subframeConfig field is arranged by network side, according to the value of described subframeConfig field, determines the transmission cycle of described one or more cycle CSI-RS and sends subframe;
Network side is according to the described transmission cycle and send subframe to the described one or more cycle CSI-RS of terminal transmission.
4. the sending method of wireless channel reference signal according to claim 3, it is characterized in that, in the time that network side determines and generate that the transmission cycles of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration in 2 cover CSI-RS whens configuration that terminal is used and described at least two cover CSI-RS configurations are N times of one or more cycle CSI-RS corresponding to a CSI-RS configuration, described the 2nd CSI-RS configuration also comprises field: CSI-RS cycle CSI_RS_Period;
It is N times that a CSI-RS configures corresponding one or more cycle CSI-RS that described field CSI_RS_Period indicates the transmission cycle of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration.
5. the sending method of wireless channel reference signal according to claim 2, it is characterized in that, described network side determines that one or more CSI-RS that terminal uses are for aperiodic is when CSI-RS, and every cover CSI-RS corresponding to described one or more CSI-RS aperiodic of generation configures and also comprise: field dciSubframeOffset;
The time delay of the DCI signaling received of relative terminal the last time of transmission subframe of described field dciSubframeOffset instruction described one or more aperiodic of CSI-RS.
6. according to the sending method of wireless channel reference signal described in claim 3,4 or 5, it is characterized in that, in the time that network side determines that terminal is used at least two cover CSI-RS configurations, generate in every cover CSI-RS configuration and also comprise: field CSI-RS configuration tricks CSI-RS-Sequence;
Described field CSI-RS-Sequence indicating terminal carries out the tricks of the CSI-RS configuration that CSI measurement uses.
7. the sending method of wireless channel reference signal according to claim 6, is characterized in that,
Described field CSI-RS-Sequence takies 1 bit, corresponding value is set and is designated as the CSI-RS configuration that 2 CSI-RS-ID of use are corresponding; Or, be designated as and use 4 CSI-RS configurations that CSI-RS-ID is corresponding.
8. according to the sending method of wireless channel reference signal described in claim 3,4 or 5, it is characterized in that, described CSI-RS configuration also comprises field Resource Unit ResourceZone;
The frequency resource position that described field ResourceZone instruction is used while sending corresponding one or more CSI-RS.
9. the sending method of wireless channel reference signal according to claim 8, is characterized in that,
When described field ResourceZone takies 2 bits, corresponding value is set and is designated as the 1st bandwidth subset of use, or, be designated as and use the 2nd bandwidth subset, or, be designated as and use the 3rd bandwidth subset, or, be designated as and use the 4th bandwidth subset;
When described field ResourceZone takies 4 bits, described 4 bits are designated as the 1st to the 4th bandwidth subset from high to low successively, and each bit arranges corresponding value and is designated as use or do not use.
10. according to the sending method of wireless channel reference signal described in claim 3,4 or 5, it is characterized in that, network side by every cover CSI-RS configuration notification to before terminal, the method also comprises: network side configures according to CSI-RS, send corresponding DCI signaling to terminal, wherein carry field CSI request;
Described network side by described field CSI request notification terminal sense cycle or aperiodic CSI-RS carry out CSI measurement.
11. sending methods of wireless channel reference signal according to claim 10, is characterized in that,
In the time that terminal has a descending network equipment to serve for it incessantly, described field CSI request uses 3 bits; Otherwise use 2 bits;
When described field CSI request uses 3 bits, corresponding value is set and is designated as:
Terminal does not trigger CSI report aperiodic, utilizes the CSI-RS in cycle to carry out CSI measurement; Or,
Terminal utilizes cycle CSI-RS to the current report of the base station for its service CSI aperiodic; Or,
Terminal utilizes cycle CSI-RS to the 1st serving BS set report CSI aperiodic; Or,
Terminal utilizes cycle CSI-RS to the 2nd serving BS set report CSI aperiodic; Or,
Terminal utilizes aperiodic CSI-RS to current base station report CSI aperiodic for its service; Or,
Terminal utilizes aperiodic CSI-RS to the 1st serving BS set report CSI aperiodic; Or,
Terminal utilizes aperiodic CSI-RS to the 2nd serving BS set report CSI aperiodic;
When described field CSI request uses 2 bits, corresponding value is set and is designated as:
Terminal does not trigger CSI report aperiodic, and only utilizes the CSI-RS in cycle to carry out CSI measurement; Or,
Terminal triggers CSI report aperiodic, utilizes the CSI-RS in cycle to carry out CSI measurement; Or,
Terminal triggers CSI report aperiodic, and utilizes aperiodic CSI-RS to carry out CSI measurement.
The dispensing device of 12. 1 kinds of wireless channel reference signals, is characterized in that, comprising:
Analysis module, carries out for definite terminal one or more sets CSI-RS that channel condition information CSI measurement is used;
Configuration module, for generating described one or more sets CSI-RS configurations;
Sending module, for passing through radio resource control RRC signaling to terminal by every cover CSI-RS configuration; And send corresponding one or more CSI-RS according to every cover CSI-RS configuration to terminal.
13. according to the dispensing device of wireless channel reference signal described in claim 12, it is characterized in that,
Described configuration module, also at least arranging following field in the every cover CSI-RS configuration generating: antenna port is counted antennaPortsCount, resource distribution resourceConfig and CSI-RS configuration identifier CSI-RS-ID.
14. according to the dispensing device of wireless channel reference signal described in claim 13, it is characterized in that,
Described configuration module, determine that at described analysis module one or more CSI-RS that terminal uses during for cycle CSI-RS, also configure field sub-frame configuration subframeConfig is set for every cover CSI-RS corresponding to the described one or more cycle CSI-RS generating; The transmission cycle of the described one or more cycle CSI-RS of described field subframeConfig instruction and transmission subframe;
Accordingly, described sending module, also for sending described one or more cycle CSI-RS according to described transmission cycle and transmission subframe to terminal.
15. according to the dispensing device of wireless channel reference signal described in claim 14, it is characterized in that,
Described configuration module, in the time that described analysis module determines that the transmission cycle of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration during terminal is used at least two cover CSI-RS configurations and described at least two cover CSI-RS configurations is N times of one or more cycle CSI-RS corresponding to a CSI-RS configuration, also for field CSI-RS cycle CSI_RS_Period being set in the 2nd CSI-RS configuration generating; It is N times that a CSI-RS configures corresponding one or more cycle CSI-RS that described field CSI_RS_Period indicates the transmission cycle of one or more cycle CSI-RS corresponding to the 2nd CSI-RS configuration.
16. according to the dispensing device of wireless channel reference signal described in claim 13, it is characterized in that,
Described configuration module, determine that at described analysis module one or more CSI-RS that terminal uses, for aperiodic is when CSI-RS, also configures field dciSubframeOffset is set for every cover CSI-RS corresponding to described one or more CSI-RS aperiodic generating; The time delay of the DCI signaling received of relative terminal the last time of transmission subframe of described field dciSubframeOffset instruction described one or more aperiodic of CSI-RS.
17. according to the dispensing device of wireless channel reference signal described in claim 14,15 or 16, it is characterized in that,
Described configuration module, in the time that described analysis module determines that terminal is used at least two cover CSI-RS, also for field CSI-RS configuration tricks CSI-RS-Sequence being set in the every cover CSI-RS configuration generating; Described field CSI-RS-Sequence indicating terminal carries out the tricks of the CSI-RS configuration that CSI measurement uses.
18. according to the dispensing device of wireless channel reference signal described in claim 14,15 or 16, it is characterized in that,
Described configuration module, also for arranging field ResourceZone in the every cover CSI-RS configuration generating; The frequency resource position that described field ResourceZone instruction is used while sending corresponding one or more CSI-RS.
19. according to the dispensing device of wireless channel reference signal described in claim 14,15 or 16, it is characterized in that,
Described sending module, also for by every cover CSI-RS configuration notification to terminal before, according to CSI-RS configuration, send corresponding DCI signaling to terminal, by the field CSI request notification terminal sense cycle in described DCI signaling or aperiodic CSI-RS carry out CSI measurement.
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