CN102355293B - Method and device for sending measurement reference signal - Google Patents
Method and device for sending measurement reference signal Download PDFInfo
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- CN102355293B CN102355293B CN201110233213.5A CN201110233213A CN102355293B CN 102355293 B CN102355293 B CN 102355293B CN 201110233213 A CN201110233213 A CN 201110233213A CN 102355293 B CN102355293 B CN 102355293B
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
-
- 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
- H04B7/10—Polarisation diversity; Directional diversity
-
- 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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
Abstract
The invention discloses a method and a device for sending a measurement reference signal. The method comprises the following steps that: user equipment select an antenna or an antenna group to send the measurement reference signal, wherein the user equipment determine the antenna or the antenna group for sending the measurement reference signal according to an antenna mapping rule, or an antenna selection rule or an antenna selection mask in the format of downlink control information. With the technical scheme of the invention, the problem of reciprocity of some channels caused by the traditional standard methods is solved, so that a base station end can obtain integral downlink CSI (Channel State Information) based on the channel reciprocity, and the optimal pre-coding matrix can be used for each PRB (Physical Resource Block) during downlink transmission so as to obtain frequency selective pre-coding gain.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of measuring reference signals launching technique and device.
Background technology
Third generation partner program (The 3rd Generation Partnership Project, referred to as
3GPP) in Long Term Evolution (Long Term Evolution, referred to as LTE) system, upward signal includes physical uplink and shares letter
Road (Physical Uplink Shared Channel, referred to as PUSCH) and its demodulated reference signal (Demodulation
Reference Signal for PUSCH), Physical Uplink Control Channel (Physical Uplink Control Channel,
Referred to as PUCCH) and its demodulated reference signal (Demodulation Reference Signal for PUCCH), measurement ginseng
Examine signal (Sounding Reference Signal, referred to as SRS) etc..
Measuring reference signals (Sounding Reference Signal, referred to as SRS) are a kind of terminal unit and base station
Between be used for measuring the signal of radio channel information (Channel State Information, referred to as CSI).In Long Term Evolution
In system, the band that user equipment (User Equipment, referred to as UE) indicates according to base station (e-Node-B, referred to as eNB)
The parameters such as width, frequency domain position, sequence cyclic shift, cycle and sub-frame offset, regularly in last data symbols sending subframe
Uplink SRS is sent on number.ENB judges the up CSI of UE according to the SRS receiving, and carries out frequency domain selection according to the CSI obtaining
Scheduling, close-loop power control etc. operate.In addition, in some systems particularly time division multiplex (Time Division
Duplex, referred to as TDD) in system, eNB can also obtain descending CSI according to the SRS receiving using channel reciprocity,
Thus carrying out the pre-encode operation of downlink transfer.
In LTE system, upward signal adopts single antenna port to launch.But, user equipment can support 1 antenna port
(Antenna Port), referred to as antenna port 0 (port 0)；Also 2 antenna ports can be supported, be referred to as antenna port 0
(port 0) and antenna port 1 (port 1).Support that the user equipment of multi-antenna port can be using the choosing of user equipment transmitting antenna
Select (UE transmit antenna selection) choice of technology antenna port transmitting upward signal.Sky launched by user equipment
Line options are configured by high level.
When closed loop (closed-loop) user equipment emitting antenna selecting is enabled by high-rise configuration, and user equipment is supported
During emitting antenna selecting, user equipment is according to descending control information format 0 (the Downlink Control being most recently received
Information format 0, referred to as DCI format 0) in the emitting antenna selecting configuration information that carries select antenna
Port, other upward signals in addition to measuring reference signals for the transmitting.Below descending control information format is illustrated：?
In LTE system, base station (eNodeB) pass through Physical Downlink Control Channel (Physical Downlink Control Channel,
Referred to as PDCCH) Downlink Control Information (Downlink Control Information, referred to as DCI) is sent to user
Equipment, including lower/upper row schedule information (downlink or uplink scheduling information), up
Emissive power control command etc..To different Downlink Control Information, LTE system defines multiple descending control information format (DCI
format).Wherein, the uplink scheduling information of Physical Uplink Shared Channel is carried on descending control information format 0 (DCI
Format 0) PDCCH in；Physical Downlink Shared Channel (Physical Downlink Shared Channel, referred to as
PDSCH down dispatch information) is carried on descending control information format 1A/1B/1C/1D/1/2A/2 (DCI format
In PDCCH 1A/1B/1C/1D/1/2A/2).
When open loop (open-loop) user equipment emitting antenna selecting is enabled by high-rise configuration, and user equipment is supported to send out
When penetrating day line options, how user equipment selects other upward signals in addition to measuring reference signals for the antenna port transmitting, work
For user equipment problem of implementation, non-standardization.
When user equipment emitting antenna selecting is enabled by high-rise configuration, and when emitting antenna selecting supported by user equipment, use
Family equipment can select antenna port, emission measurement reference signal according to certain rule.
Senior long term evolution (LTE-Advanced, referred to as LTE-A) system is the evolution system of future generation of LTE system.
In lte-a system, the upward signal such as PUSCH, PUCCH, SRS can may also be employed multiple antennas end using the transmitting of single antenna port
Mouth transmitting；User equipment can support 1 antenna port (port 0), 2 antenna ports (port 0/1), or 4 antenna ports
(port 0/1/2/3) launches upward signal.And for downlink transfer, user equipment then can be with 1,2,4,6 or 8
Individual antenna port receives the data of downlink transfer.When base station needs to carry out downlink transfer using channel reciprocity, according to current
The way of standard occurs the problem of local channel reciprocity.Local channel reciprocity sex chromosome mosaicism refers to the dual-mode antenna configuration of UE
Asymmetric situation, for example, UE is up to use 1 transmitting antenna, and using 4 reception antennas during downlink reception, when base station needs
Will by measure SRS using channel reciprocity to carry out downlink transfer when, because up employs 1 transmitting antenna, therefore
Base station can only obtain the channel reciprocity of part, the downlink spatial multiplexing transmission that can only the use of order (Rank) is 1, and now base station is not
Can judge that the order that when can be 2 or higher with order is carried out downlink transfer and used which kind of pre-coding matrix.For this
One problem, not yet proposes effective solution at present.
Content of the invention
Present invention is primarily targeted at providing a kind of measuring reference signals launching technique and device, to solve above-mentioned asking
Topic.
According to an aspect of the invention, it is provided a kind of measuring reference signals launching technique, including：User equipment selects
Antenna or antenna sets emission measurement reference signal, wherein, user equipment according to antenna mapping rule or sky line options rule or
The sky line options mask of descending control information format determines antenna or antenna sets for emission measurement reference signal.
User equipment is according to the sky line options of antenna mapping rule or sky line options rule or descending control information format
Mask determines that antenna for launching described measuring reference signals or antenna sets include：When antenna and antenna port do not possess one by one
During corresponding relation, user equipment determines antenna or the antenna sets for emission measurement reference signal according to antenna mapping rule；When
When antenna and antenna port possess one-to-one relationship, user equipment is regular or descending control information format according to sky line options
Its line options mask determines antenna or antenna sets for emission measurement reference signal.
Antenna mapping rule includes：In different measuring reference signals delivery times, the transmitting antenna of measuring reference signals
Port switches over successively between antennas.
Its line options rule includes：It is a (n in antenna index or antenna group indexSRS) antenna or antenna sets on send the
nSRSIndividual measuring reference signals, wherein, antenna index or antenna group index are a (nSRS) determined according to formula below：
a(nSRS)=nSRSMod2 or a (nSRS)=nSRSMod4, wherein, nSRSTransmission times for measuring reference signals or
Value for measuring reference signals transmitting counter.
Antenna index or antenna group index are a (nSRS) determined according to formula below：
When measuring reference signals do not enable in the frequency hopping of frequency domain, a (nSRS)=nSRSMod2 or a (nSRS)=
nSRSmod4；
When measuring reference signals enable in the frequency hopping of frequency domain,
Or
Wherein For 1, Nb′Tree-like for measuring reference signals bandwidth
B ' layer corresponding branch number, B during structure distributionSRSFor the proprietary SRS bandwidth of user, bhopFor the proprietary frequency frequency hopping band of user
Wide.
The sky line options mask of above-mentioned descending control information format corresponds antenna or antenna sets in user equipment.
Above-mentioned control information form is the information format carrying uplink scheduling information or bearing downlink schedule information.
Above-mentioned descending control information format includes：format 4、format 2A、format 2B、format 2C.
According to a further aspect in the invention, there is provided a kind of measuring reference signals discharger, on user equipment, bag
Include：Determining module, for the sky line options according to antenna mapping rule or sky line options rule or descending control information format
Mask determines antenna or antenna sets for emission measurement reference signal；Sending module, for using above-mentioned antenna or antenna sets
Emission measurement reference signal.
Sending module includes：First determining unit, for when antenna and antenna port do not possess one-to-one relationship, root
Determine antenna or the antenna sets for emission measurement reference signal according to antenna mapping rule；Second determining unit, in antenna
When possessing one-to-one relationship with antenna port, according to the sky line options mask of sky line options rule or descending control information format
Determine the antenna for emission measurement reference signal or antenna sets.
Antenna mapping rule includes：In different measuring reference signals delivery times, the transmitting antenna of measuring reference signals
Port switches over successively between antennas.
Its line options rule includes：It is a (n in antenna index or antenna group indexSRS) antenna or antenna sets on send the
nSRSIndividual measuring reference signals, wherein, antenna index or antenna group index are a (nSRS) determined according to formula below：
a(nSRS)=nSRSMod2 or a (nSRS)=nSRSMod4, wherein, nSRSTransmission times for measuring reference signals or
Value for measuring reference signals transmitting counter.
Antenna index or antenna group index are a (nSRS) determined according to formula below：
When measuring reference signals do not enable in the frequency hopping of frequency domain, a (nSRS)=nSRSMod2 or a (nSRS)=
nSRSmod4；
When measuring reference signals enable in the frequency hopping of frequency domain,
Or
Wherein For 1, Nb′Tree-like for measuring reference signals bandwidth
B ' layer corresponding branch number, B during structure distributionSRSFor the proprietary SRS bandwidth of user, bhopFor the proprietary frequency frequency hopping band of user
Wide.
The sky line options mask of above-mentioned descending control information format corresponds antenna or antenna sets in user equipment.
Above-mentioned descending control information format is the information format carrying uplink scheduling information or bearing downlink schedule information.
Above-mentioned descending control information format includes：format 4、format 2A、format 2B、format 2C.
By the present invention, adopt by user terminal according to antenna mapping rule, sky line options rule or Downlink Control Information
The sky line options mask of form determines antenna or antenna sets for launching current measuring reference signals in real time, concurrently finally sends out
Penetrate the scheme of this measuring reference signals, solve the problems, such as that the way of current standard occurs local channel reciprocity so that base
End of standing can obtain complete down channel CSI by channel reciprocity, such that it is able to for each physics money during downlink transfer
Source block (Physical Resource Block, referred to as PRB), using optimum pre-coding matrix, obtains frequency selectivity pre-
Coding gain.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of measuring reference signals launching technique according to embodiments of the present invention；
Fig. 2 is the up transmitting antenna number according to present example one is 2, and downlink reception number of antennas is that when 4, SRS sends out
Penetrate antenna port to the mapping schematic diagram of user equipment physical antenna；
Fig. 3 is the up transmitting antenna number according to present example one is 4, and downlink reception number of antennas is that when 8, SRS sends out
Penetrate antenna port to the mapping schematic diagram of user equipment physical antenna；
Fig. 4 is the mapping schematic diagram to user equipment physical antenna for the SRS transmit antenna port according to present example two；
Fig. 5 is the mapping schematic diagram to user equipment physical antenna for the SRS transmit antenna port according to present example three；
Fig. 6 is the structured flowchart of measuring reference signals discharger according to embodiments of the present invention.
Specific embodiment
To describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that not conflicting
In the case of, the embodiment in the application and the feature in embodiment can be mutually combined.
Fig. 1 is the flow chart of measuring reference signals launching technique according to embodiments of the present invention.As shown in figure 1, according to this
The measuring reference signals launching technique of inventive embodiments includes：
Step S102, user equipment is regular or descending control information format according to antenna mapping rule or sky line options
Its line options mask determines antenna or antenna sets for launching SRS；
Step S104, user equipment launches this SRS using above-mentioned antenna or antenna sets.
The measuring reference signals launching technique that the present embodiment provides has been abandoned and has been had been used up showing of same antenna transmitting SRS
There is measuring reference signals radiation pattern, there is provided a kind of dynamic measuring reference signals radiation pattern, that is, user equipment can select
Antenna or antenna sets transmitting SRS, wherein, user equipment is believed according to antenna mapping rule or sky line options rule or descending control
The sky line options mask of breath form determines antenna for launching SRS or antenna sets that is to say, that for not SRS in the same time,
User equipment can be covered according to the sky line options of antenna mapping rule, sky line options rule or descending control information format in real time
Code determines antenna or the antenna sets for launching this SRS, to overcome dual-mode antenna to configure the asymmetric local channel reciprocity bringing
Sex chromosome mosaicism.Wherein, antenna mapping rule is to overcome dual-mode antenna by changing antenna port with the corresponding relation of physical antenna
Asymmetric, sky line options rule is to select different antennas to launch SRS to overcome the asymmetric of dual-mode antenna by real-time,
And determine that antenna for launching this SRS or antenna sets are actually one according to the sky line options mask of descending control information format
Plant base station indicating mechanism, be used for sending by the sky line options mask instruction user equipment of descending control information format by base station
The antenna of SRS or antenna sets.By the emitting antenna selecting mechanism of SRS, base station end just can have been obtained by channel reciprocity
Whole down channel CSI, such that it is able to using optimum pre-coding matrix, obtain frequency choosing for each PRB during downlink transfer
Selecting property pre-coding gain.
Preferably, user equipment is according to the antenna of antenna mapping rule, sky line options rule or descending control information format
Mask is selected to determine that antenna for launching SRS or antenna sets may further include：
When antenna and antenna port do not possess one-to-one relationship, user equipment determines according to antenna mapping rule and is used for
The antenna of transmitting SRS or antenna sets；
When antenna and antenna port possess one-to-one relationship, user equipment is according to sky line options are regular or descending control
The sky line options mask of information format determines antenna or antenna sets for launching SRS.
Antenna mapping rule needs to change the mapping relations of antenna port and physical antenna in real time, with by different skies
SRS launched by line, thus overcoming the problem of local channel reciprocity.Therefore determined for launching SRS's according to antenna mapping rule
Antenna or antenna sets are mainly used in the case that antenna do not possess one-to-one relationship with antenna port, antenna and antenna here
The not one-to-one situation in port includes that antenna port is consistent with the quantity of antenna but situation that mapping relations are variable, also includes sky
The line end mouth situation inherently inconsistent with the quantity of antenna.
Antenna for launching SRS is determined according to the sky line options mask of sky line options rule or descending control information format
Or antenna sets are primarily adapted for use in antenna and antenna port possesses the situation of one-to-one relationship, so, are determining for launching
After the antenna of SRS or antenna sets, the antenna port for launching SRS is just decided accordingly.Antenna and antenna port
It is just permissible that one-to-one relationship is to ensure that user terminal sends SRS using the antenna determining according to sky line options rule or antenna sets
Overcome a premise of the discordance of dual-mode antenna.Likewise, in the sky line options mask according to descending control information format
Determine in antenna for launching SRS or the base station indicating mechanism of antenna sets, also require that antenna and antenna port have one by one
Corresponding relation is to ensure that sending SRS using the antenna determining according to sky line options mask or antenna sets can overcome dual-mode antenna
Discordance.
For antenna mapping rule, change antenna port actually permissible with the rule of physical antenna mapping relations
The flexible setting of needs according to user, its basic principle is to be sent using different antennae in different SRS delivery times
SRS, the antenna amount for sending SRS can not be less than the maximum of this user equipment spendable antenna when carrying out downlink reception
Quantity, is exactly preferably with all antennas of traverse user equipment, the transmitting making SRS so can ensure that base station total energy obtains
Whole channel reciprocities.
A kind of wider change antenna port of range and physical antenna mapping relations are given in this preferred embodiment
Rule：Preferably, above-mentioned antenna mapping rule can include：In different SRS delivery times, the transmit antenna port of SRS
Switch between antennas successively.
In the prior art, when user equipment emitting antenna selecting is enabled by high-rise configuration, and transmitting supported by user equipment
During its line options, user equipment can select antenna port according to certain rule, to launch SRS.This preferred embodiment is in this base
Improved on plinth, after determining antenna port, in different SRS delivery times, user equipment is by the transmitting antenna of SRS
Port switches over successively between antennas it is ensured that the transmitting of SRS can be with all antennas of traverse user equipment, thus overcoming
The problem of local channel reciprocity.Certainly, the transmit antenna port of SRS is switched over by user equipment successively between antennas
Premise is that antenna port does not possess one-to-one relation with antenna.
For sky line options rule, it is also diversified, can arrange different selection rule according to different needs
Then.This preferred embodiment provides a kind of general sky line options rule.Preferably, above-mentioned sky line options rule can include：?
Antenna index or antenna group index are a (nSRS) antenna or antenna sets on send n-thSRSIndividual measuring reference signals, wherein, antenna
Index or antenna group index are a (nSRS) determined according to formula below：a(nSRS)=nSRSMod2 or a (nSRS)=nSRSMod4, its
In, nSRSTransmission times for measuring reference signals or the value for measuring reference signals transmitting counter.
The sky line options rule being given in this preferred embodiment is also a kind of ergodic selection rule, from a (nSRS) really
From the point of view of determining formula, actually all antennas of user terminal are divided into 2 groups or 4 groups, every group includes an antenna or many
Individual antenna, when launching SRS, launches SRS using these groups successively it is ensured that each antenna can be used to launch SRS, thus
Overcome the problem of local channel reciprocity.Certainly, can be used to launch SRS it is desirable to antenna end to ensure each antenna
Mouth is one-to-one with antenna.
Preferably, above-mentioned antenna index or antenna group index are a (nSRS) can also be determined according to formula below：
When measuring reference signals do not enable in the frequency hopping of frequency domain, a (nSRS)=nSRSMod2 or a (nSRS)=
nSRSmod4；
When measuring reference signals enable in the frequency hopping of frequency domain,
Or
Wherein For 1, Nb′Tree-like for measuring reference signals bandwidth
B ' layer corresponding branch number, B during structure distributionSRSFor the proprietary SRS bandwidth of user, bhopFor the proprietary frequency frequency hopping band of user
Wide.
The antenna index that this preferred embodiment provides or antenna group index are a (nSRS) determination method according to measurement reference
Signal frequency domain frequency hopping whether enable give different determination formula it is ensured that user terminal whether measurement with reference to letter
Number in the case that the frequency hopping of frequency domain does not enable, or all may be used in the case that measuring reference signals enable in the frequency hopping of frequency domain
To overcome local channel reciprocity problem.
Antenna for emission measurement reference signal is determined for the sky line options mask according to descending control information format
Or the base station indicating mechanism of antenna sets, sky line options mask is also very with the setting of antenna or the concrete corresponding relation of antenna sets
Flexibly, a basic principle but is also had will to observe：Preferably, the sky line options mask one of above-mentioned descending control information format
One antenna corresponding to user equipment or antenna sets.Base station is required to be sent to user terminal by descending control information format
The antenna of its line options mask and user terminal or antenna sets are one-to-one that is to say, that user terminal can be according to sky
Line options mask uniquely determines an antenna or antenna sets to send current SRS.
Preferably, above-mentioned descending control information format refers mainly to carry uplink scheduling information or bearing downlink schedule information
Information format.
The load that carry the information format of uplink scheduling information or bearing downlink schedule information as sky line options mask is used
Structural reform is dynamic less, implements and is relatively easy to.
Preferably, above-mentioned descending control information format includes：format 4、format 2A、format 2B、format
2C.
The present invention preferentially uses above-mentioned descending control information format.
With reference to example, above preferred embodiment is described in detail.
Example one：
In this example, user equipment selects antenna or antenna sets emission measurement reference signal according to antenna mapping rule.
As shown in Fig. 2 uplink SRS transmitting antenna number is 2, when downlink reception antenna is 4, for solving local channel reciprocity
Sex chromosome mosaicism, can be cut successively in different SRS delivery times, the transmit antenna port of SRS between physics transmitting antennas
Change mapping.Such as, in first transmission subframe of SRS, the emission port 0 of SRS is mapped to physical antenna 0, the emission port of SRS
1 is mapped to physical antenna 1；Then in second transmission subframe of SRS, the emission port 0 of SRS is mapped to physical antenna 2, SRS's
Emission port 1 is mapped to physical antenna 3；In the 3rd transmission subframe of SRS, the emission port 0 of SRS is mapped to physical antenna 0,
The emission port 1 of SRS is mapped to physical antenna 1；The like, the transmit antenna port of SRS circulates in physics transmitting sky successively
Mapping is switched between line.
Or, in first transmission subframe of SRS, the emission port 0 of SRS is mapped to physical antenna 0, the transmitting terminal of SRS
Mouth 1 is mapped to physical antenna 2；Then in second transmission subframe of SRS, the emission port 0 of SRS is mapped to physical antenna 1, SRS
Emission port 1 be mapped to physical antenna 3；In the 3rd transmission subframe of SRS, the emission port 0 of SRS is mapped to physical antenna
0, SRS emission port 1 is mapped to physical antenna 2；The like, the transmit antenna port of SRS circulates in physics transmitting successively
Mapping is switched between antenna.
As shown in figure 3, when uplink SRS transmitting antenna number is 4, and downlink reception antenna is 8, mutual for solving local channel
Easily sex chromosome mosaicism, can be in different SRS delivery times, and the transmit antenna port of SRS is carried out successively between physics transmitting antennas
Switching mapping.Such as in first transmission subframe of SRS, the emission port 0 of SRS, port 1, port 2, port 3 are respectively mapped to
Physical antenna 0,1,2,3；Then in second transmission subframe of SRS, the emission port 0 of SRS, port 1, port 2, port 3 are respectively
It is mapped to physical antenna 4,5,6,7；In the 3rd transmission subframe of SRS, the emission port 0 of SRS, port 1, port 2, port 3
It is respectively mapped to physical antenna 0,1,2,3；The like, the transmit antenna port of SRS circulate in successively physics transmitting antennas it
Between switch over mapping.
Or, in first transmission subframe of SRS, the emission port 0 of SRS, port 1, port 2, port 3 are respectively mapped to
Physical antenna 0,4,1,5；Then in second transmission subframe of SRS, the emission port 0 of SRS, port 1, port 2, port 3 are respectively
It is mapped to physical antenna 2,6,3,7；In the 3rd transmission subframe of SRS, the emission port 0 of SRS, port 1, port 2, port 3
It is respectively mapped to physical antenna 0,4,1,5；The like, the transmit antenna port of SRS circulate in successively physics transmitting antennas it
Between switch over mapping.
Example two：
In this example, user equipment selects antenna or antenna sets emission measurement reference signal according to sky line options rule.
Above-mentioned sky line options rule includes：
User equipment is a (n in antenna index or group indexSRS) antenna or antenna sets on send n-thSRSIndividual measurement reference
Signal, wherein, every group of transmitting antenna includes 1 or many transmitting antennas, antenna index or antenna group index a (nSRS) according to such as
Under type determines：
Mode one：
a(nSRS)=nSRSMod2 or a (nSRS)=nSRSmod4.
Mode two：
When SRS does not enable in the frequency hopping of frequency domain, a (nSRS)=nSRSMod2 or a (nSRS)=nSRSmod4；
When SRS enables in the frequency hopping of frequency domain,
Or
Wherein For 1, Nb′For the distribution of SRS bandwidth tree structure
When b ' layer corresponding branch number, nSRSThe value of the transmitting counter (for recording the transmission times of measuring reference signals) for SRS,
Or the transmission times (one of form of expression of measuring reference signals transmission times) for measuring reference signals to be sent, BSRS
For the proprietary SRS bandwidth of user, bhopFor the proprietary frequency frequency hopping bandwidth of user, ∏ is the operation that many numbers are multiplied.
In this example, as shown in figure 4, the transmit antenna port of SRS corresponds is mapped to physical antenna, can be by its stroke
It is divided into 2 or 4 antenna sets, carries out antenna group selection using aforesaid way, you can ensure that this 2 or 4 antenna sets all can be used for SRS
Transmitting, thus overcome local channel reciprocity sex chromosome mosaicism.
Example three：
In this example, user equipment determines antenna or antenna according to the sky line options mask of descending control information format
Group emission measurement reference signal.
The antenna (port) with user equipment of descending control information format or with antenna (port) organize correspond, sky
Line (port) group includes one or more antennas (port).
Descending control information format is the information format carrying uplink scheduling information or bearing downlink schedule information, descending control
Information format processed includes：format 4、format 2A、format 2B、format 2C.
When base station sends the PDCCH of multiple portability skies line options mask in a certain subframe to user equipment, base station
Identical sky line options mask or base station can be carried on the plurality of PDCCH and carry this on a specific PDCCH wherein
Its line options mask.
In prior art, sky line options mask is mainly used in the Physical Downlink Control Channel being sent to user equipment
Ring redundancy check (Cyclic Redundancy Check, referred to as CRC) the check bit scrambling of PDCCH.
Entered using cyclic redundancy check and correction Downlink Control Information DCI error detection (error detection) in LTE system below
Row explanation.Payload a of whole PDCCH0, a1, a2, a3..., aA-1It is used for calculating CRC check bit (CRC parity
bits)p0, p1, p2, p3..., pL-1.After CRC check, obtain sequence b0, b1, b2, b3..., bB-1, wherein B=A+L, wherein, A
It is the bit number (PDCCH payload size) of PDCCH payload, L is the bit number of CRC check bit, such as L=16.
When user equipment emitting antenna selecting is configured to not enable by high level, or emitting antenna selecting do not supported by user equipment
When, with corresponding radio network temporary identifier (Radio Network Temporary Identifier, referred to as RNTI)
To CRC check bit scramble, obtain sequence c0, c1, c2, c3..., cB-1：
ck=bkK=0,1,2 ..., A-1；
ck=(bk+xRnti, k-A) mod2 k=A, A+1, A+2 ..., A+15；
Wherein, xRnti, 0, xRnti, 1..., xRnti, 15For RNTI, xRnti, 0Highest order for RNTI.
When closed loop (closed-loop) user equipment emitting antenna selecting is enabled by high-rise configuration, and user equipment is supported
During emitting antenna selecting, with sky line options mask (antenna selection mask) and corresponding RNTI to DCI format
The CRC check bit scramble of the PDCCH of 0 form, obtains sequence c0, c1, c2, c3..., cB-1：
ck=bkK=0,1,2 ..., A-1；
ck=(bk+xRnti, k-A+xAS, k-A) mod2 k=A, A+1, A+2 ..., A+15；
Wherein, xRnti, 0, xRnti, 1..., xRnti, 15For RNTI, xRnti, 0Highest order for RNTI；xAS, 0, xAS, 1...,
xAS, 15For sky line options mask, xAS, 0Highest order for sky line options mask.
Ring redundancy check check bit scrambling in lte-a system is similar to the above, will not be described here.
In this example, SRS transmit antenna port correspond be mapped to physical antenna, as shown in figure 5, by with sky
Line one-to-one sky line options mask, base station can control user terminal and selects different skies in different SRS delivery times
SRS launched by line, thus overcoming the problem of part reciprocity.Certainly, line options mask in sky can also be corresponded with antenna sets.
In this example, the Hamming distance of two sky line options masks is：In the corresponding code bit of two sky line options masks
The number of different code elements.For example, by the way of as shown in table 1, table 2, table 3, table 4 or table 5, antenna (port) or sky are set up
Line (port) group 0/1/2/3 and the one-to-one relationship of sky line options mask, L=16 here.
Table 1
Table 2
Table 3
Table 4
Table 5
Or, by the way of as shown in table 6, set up antenna (port) or antenna (port) group 0/1 covered with sky line options
The one-to-one relationship of code.
Table 6
Fig. 6 is the structural representation of measuring reference signals discharger according to embodiments of the present invention.As shown in fig. 6, root
Measuring reference signals discharger according to the embodiment of the present invention includes：
Determining module 62, for the sky according to antenna mapping rule or sky line options rule or descending control information format
Line options mask determines antenna or antenna sets for launching SRS；
Sending module 64, connects to determining module 62, for launching this SRS using above-mentioned antenna or antenna sets.
The measuring reference signals discharger that the present embodiment provides has been abandoned and has been had been used up showing of same antenna transmitting SRS
There is measuring reference signals mode, employ a kind of dynamic measuring reference signals radiation pattern, for not SRS in the same time, send out
Send module 64 can be covered according to the sky line options of antenna mapping rule, sky line options rule or descending control information format in real time
Code determines antenna or the antenna sets for launching this SRS, to overcome dual-mode antenna to configure the asymmetric local channel reciprocity bringing
Sex chromosome mosaicism.Wherein, antenna mapping rule is to overcome dual-mode antenna by changing antenna port with the corresponding relation of physical antenna
Asymmetric, sky line options rule is to select different antennas to launch SRS to overcome the asymmetric of dual-mode antenna by real-time,
And determine that antenna for launching this SRS or antenna sets are actually one according to the sky line options mask of descending control information format
Plant base station indicating mechanism, be used for sending by the sky line options mask instruction user equipment of descending control information format by base station
The antenna of SRS or antenna sets.By the emitting antenna selecting mechanism of SRS, base station end just can have been obtained by channel reciprocity
Whole down channel CSI, such that it is able to using optimum pre-coding matrix, obtain frequency choosing for each PRB during downlink transfer
Selecting property pre-coding gain.
Preferably, sending module may further include：
First determining unit, for when antenna does not possess one-to-one relationship with antenna port, advising according to antenna mapping
Then determine the antenna for launching SRS or antenna sets；
Second determining unit, for when antenna possesses one-to-one relationship with antenna port, according to sky line options rule
Or the sky line options mask of descending control information format determines antenna or antenna sets for launching SRS.
First determining unit is mainly used in the case that antenna and antenna port do not possess one-to-one relationship, and first is true
Order unit can change the mapping relations of antenna port and physical antenna in real time according to antenna mapping rule, with by different skies
SRS launched by line, thus overcoming the problem of local channel reciprocity.Here the not one-to-one situation of antenna and antenna port includes
Antenna port is consistent with the quantity of antenna but situation that mapping relations are variable, also includes the quantity of antenna port and antenna inherently
Inconsistent situation.
Second determining unit is mainly used in the case that antenna and antenna port possess one-to-one relationship, so,
After determining antenna or the antenna sets for launching SRS, the antenna port for launching SRS is just decided accordingly.My god
Line is to ensure that user terminal using the antenna determining according to sky line options rule or antenna with the one-to-one relationship of antenna port
Group sends the premise that SRS just can overcome the discordance of dual-mode antenna.Likewise, the second determining unit is according to descending
When the sky line options mask of control information form determines antenna or antenna sets for launching SRS, need also exist for antenna and antenna
Port have one-to-one relationship with ensure using according to sky line options mask determine antenna or antenna sets send SRS can gram
Take the discordance of dual-mode antenna.
Preferably, above-mentioned antenna mapping rule can include：In different SRS delivery times, the transmit antenna port of SRS
Switch between antennas successively.
In different SRS delivery times, the transmit antenna port of SRS is switched over successively between antennas it is ensured that
The transmitting of SRS can be with all antennas of traverse user equipment, thus overcoming the problem of local channel reciprocity.
Preferably, above-mentioned sky line options rule can include：It is a (n in antenna index or antenna group indexSRS) antenna
Or in antenna sets, send n-thSRSIndividual measuring reference signals, wherein, antenna index or antenna group index are a (nSRS) according to following public affairs
Formula determines：a(nSRS)=nSRSMod2 or a (nSRS)=nSRSMod4, wherein, nSRSTransmission times for measuring reference signals or
Value for measuring reference signals transmitting counter.
The sky line options rule being given in this preferred embodiment is a kind of ergodic selection rule, from a (nSRS) determination
From the point of view of formula, actually all antennas of user terminal are divided into 2 groups or 4 groups, every group includes an antenna or multiple
Antenna, when launching SRS, launches SRS using these groups successively it is ensured that each antenna can be used to launch SRS, thus gram
Take the problem of local channel reciprocity.
Preferably, above-mentioned antenna index or antenna group index are a (nSRS) can also be determined according to formula below：
When measuring reference signals do not enable in the frequency hopping of frequency domain, a (nSRS)=nSRSMod2 or a (nSRS)=
nSRSmod4；
When measuring reference signals enable in the frequency hopping of frequency domain,
Or
Wherein For 1, Nb′Tree-like for measuring reference signals bandwidth
B ' layer corresponding branch number, B during structure distributionSRSFor the proprietary SRS bandwidth of user, bhopFor the proprietary frequency frequency hopping band of user
Wide.
The antenna index that this preferred embodiment provides or antenna group index are a (nSRS) determination method according to measurement reference
Signal frequency domain frequency hopping whether enable give different determination formula it is ensured that user terminal whether measurement with reference to letter
Number in the case that the frequency hopping of frequency domain does not enable, or all may be used in the case that measuring reference signals enable in the frequency hopping of frequency domain
To overcome local channel reciprocity problem.
Preferably, the sky line options mask of above-mentioned descending control information format corresponds antenna or sky in user equipment
Line group.
Antenna or sky for emission measurement reference signal are determined according to the sky line options mask of descending control information format
Line group actually it is determined that a kind of base station indicating mechanism, that is, pass through descending control information format and send sky line options mask by base station
It is used for launching the antenna of SRS to user terminal indicating user terminal, to overcome part reciprocity sex chromosome mosaicism, therefore it is required that sky line options
The antenna of mask and user terminal or antenna sets are one-to-one it is ensured that user terminal can be unique according to sky line options mask
One antenna of determination or antenna sets to send current SRS.
Preferably, above-mentioned descending control information format refers mainly to carry uplink scheduling information or bearing downlink schedule information
Information format.
The load that carry the information format of uplink scheduling information or bearing downlink schedule information as sky line options mask is used
Structural reform is dynamic less, implements and is relatively easy to.
Preferably, above-mentioned descending control information format includes：format 4、format 2A、format 2B、format
2C.
The present invention preferentially uses above-mentioned descending control information format.
As can be seen from the above description, the technical scheme that the present invention provides solves in correlation technique because UE receives
Send out antenna configurations asymmetric and occur local channel reciprocity sex chromosome mosaicism.By the emitting antenna selecting machine of measuring reference signals
System, base station end can obtain complete down channel CSI by channel reciprocity, such that it is able to for each during downlink transfer
PRB, using optimum pre-coding matrix, obtains frequency selectivity pre-coding gain.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Computing device realizing, they can concentrate on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the executable program code of computing device, it is thus possible to they are stored
To be executed by computing device in the storage device, and in some cases, can be with different from shown in order execution herein
The step going out or describing, or they are fabricated to respectively each integrated circuit modules, or by the multiple modules in them or
Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (14)
1. a kind of measuring reference signals launching technique is it is characterised in that include：
User equipment selects antenna or antenna sets emission measurement reference signal, and wherein, described user equipment is advised according to antenna mapping
Then or sky line options rule or descending control information format sky line options mask determine for launch described measurement with reference to letter
Number described antenna or antenna sets；
Wherein, described user equipment is according to the antenna of antenna mapping rule or sky line options rule or descending control information format
Mask is selected to determine that antenna for launching described measuring reference signals or antenna sets include：
When antenna does not possess one-to-one relationship with antenna port, described user equipment determines according to described antenna mapping rule
For launching antenna or the antenna sets of described measuring reference signals；
When antenna possesses one-to-one relationship with antenna port, described user equipment is regular or described according to described sky line options
The sky line options mask of descending control information format determines antenna or antenna sets for launching described measuring reference signals.
2. method according to claim 1 is it is characterised in that described antenna mapping rule includes：In different measurement ginsengs
Examine signal delivery time, the transmit antenna port of described measuring reference signals switches over successively between antennas.
3. method according to claim 1 is it is characterised in that line options rule in described sky includes：In antenna index or sky
Line group index is a (nSRS) antenna or antenna sets on send n-thSRSIndividual measuring reference signals, wherein, described antenna index or sky
Line group index is a (nSRS) determined according to formula below：
a(nSRS)=nSRSMod2 or a (nSRS)=nSRSMod4, wherein, nSRSTransmission times for described measuring reference signals or
Value for described measuring reference signals transmitting counter.
4. method according to claim 3 is it is characterised in that described antenna index or antenna group index are a (nSRS) basis
Formula below determines：
When measuring reference signals do not enable in the frequency hopping of frequency domain, a (nSRS)=nSRSMod2 or a (nSRS)=nSRSmod4；
When measuring reference signals enable in the frequency hopping of frequency domain,
Or
Wherein For 1, Nb'For the tree-like knot of measuring reference signals bandwidth
B' layer corresponding branch number, B during structure distributionSRSFor the proprietary SRS bandwidth of user, bhopFor the proprietary frequency frequency hopping bandwidth of user.
5. method according to claim 1 is it is characterised in that the sky line options mask one of described descending control information format
One antenna corresponding to described user equipment or antenna sets.
6. method according to claim 5 is it is characterised in that described descending control information format is to carry uplink scheduling letter
Breath or the information format of bearing downlink schedule information.
7. method according to claim 6 is it is characterised in that described descending control information format includes：format 4、
format2A、format 2B、format 2C.
8. a kind of measuring reference signals discharger, it is characterised in that including on user equipment：
Determining module, for the sky line options according to antenna mapping rule or sky line options rule or descending control information format
Mask determines antenna or antenna sets for emission measurement reference signal；
Sending module, for launching described measuring reference signals using described antenna or antenna sets；
Wherein, described sending module includes：
First determining unit, for when antenna does not possess one-to-one relationship with antenna port, advising according to described antenna mapping
Then determine the antenna for launching described measuring reference signals or antenna sets；
Second determining unit, for when antenna possesses one-to-one relationship with antenna port, according to described sky line options rule
Or the sky line options mask of described descending control information format determines antenna or antenna for launching described measuring reference signals
Group.
9. device according to claim 8 is it is characterised in that described antenna mapping rule includes：In different measurement ginsengs
Examine signal delivery time, the transmit antenna port of described measuring reference signals switches over successively between antennas.
10. device according to claim 8 is it is characterised in that line options rule in described sky includes：In antenna index or sky
Line group index is a (nSRS) antenna or antenna sets on send n-thSRSIndividual measuring reference signals, wherein, described antenna index or sky
Line group index is a (nSRS) determined according to formula below：
a(nSRS)=nSRSMod2 or a (nSRS)=nSRSMod4, wherein, nSRSTransmission times for described measuring reference signals or
Value for described measuring reference signals transmitting counter.
11. devices according to claim 10 are it is characterised in that described antenna index or antenna group index are a (nSRS) root
Determine according to formula below：
When measuring reference signals do not enable in the frequency hopping of frequency domain, a (nSRS)=nSRSMod2 or a (nSRS)=nSRSmod4；
When measuring reference signals enable in the frequency hopping of frequency domain,
Or
Wherein For 1, Nb'For the tree-like knot of measuring reference signals bandwidth
B' layer corresponding branch number, B during structure distributionSRSFor the proprietary SRS bandwidth of user, bhopFor the proprietary frequency frequency hopping bandwidth of user.
12. devices according to claim 8 are it is characterised in that the sky line options mask of described descending control information format
Correspond the antenna in described user equipment or antenna sets.
13. devices according to claim 12 are it is characterised in that described descending control information format is to carry uplink scheduling
Information or the information format of bearing downlink schedule information.
14. devices according to claim 13 are it is characterised in that described descending control information format includes：format 4、
format2A、format 2B、format 2C.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110233213.5A CN102355293B (en) | 2011-08-15 | 2011-08-15 | Method and device for sending measurement reference signal |
| PCT/CN2011/084155 WO2012152000A1 (en) | 2011-08-15 | 2011-12-16 | Sounding reference signal transmission method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110233213.5A CN102355293B (en) | 2011-08-15 | 2011-08-15 | Method and device for sending measurement reference signal |
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| Publication Number | Publication Date |
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| CN102355293A CN102355293A (en) | 2012-02-15 |
| CN102355293B true CN102355293B (en) | 2017-02-08 |
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|---|---|---|---|
| CN201110233213.5A Expired - Fee Related CN102355293B (en) | 2011-08-15 | 2011-08-15 | Method and device for sending measurement reference signal |
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| WO (1) | WO2012152000A1 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104716998A (en) * | 2013-12-16 | 2015-06-17 | 中兴通讯股份有限公司 | Reference signal transmitting method and device |
| CN104734762B (en) * | 2013-12-20 | 2018-12-25 | 中兴通讯股份有限公司 | A kind of processing method, device and system finding signal |
| CN106664192B (en) * | 2015-01-30 | 2020-12-01 | 韩国电子通信研究院 | Method and apparatus for configuring port numbers of CSI-RS antenna ports |
| CN106685621A (en) * | 2015-11-06 | 2017-05-17 | 中兴通讯股份有限公司 | SRS processing method and device |
| CN106817156A (en) * | 2015-11-27 | 2017-06-09 | 中兴通讯股份有限公司 | The indicating means and device of antenna selection information |
| US10771138B2 (en) * | 2016-07-22 | 2020-09-08 | Lg Electronics Inc. | Uplink multi-antenna transmission method in wireless communication system and apparatus therefor |
| US10397940B2 (en) * | 2016-07-29 | 2019-08-27 | Qualcomm Incorporated | Techniques for dynamically allocating uplink resources in wireless communications |
| US10454541B2 (en) * | 2016-08-12 | 2019-10-22 | Qualcomm Incorporated | Dynamic uplink antenna port management |
| US10560169B2 (en) | 2017-03-24 | 2020-02-11 | Mediatek Inc. | CSI acquisition with channel reciprocity in mobile communications |
| CN108737041B (en) * | 2017-04-18 | 2020-05-26 | 上海朗帛通信技术有限公司 | Method and device for user equipment and base station for multi-antenna transmission |
| EP3679668B1 (en) | 2017-09-29 | 2022-04-06 | Huawei Technologies Co., Ltd. | Devices and methods for encoding downlink control information in a communication network |
| CN109600156B (en) * | 2017-09-30 | 2020-10-02 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
| EP3637850B1 (en) * | 2017-10-30 | 2021-08-11 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and network device for transmitting signal |
| US20190260435A1 (en) * | 2018-02-17 | 2019-08-22 | Mediatek Inc. | Uplink Transmission Schemes In Mobile Communications |
| EP3764561B1 (en) * | 2018-04-04 | 2023-08-16 | Huawei Technologies Co., Ltd. | Method for transmitting sounding reference signal, terminal device and computer readable storage medium |
| CN110351851B (en) * | 2018-04-04 | 2023-08-25 | 华为技术有限公司 | Data transmission method, terminal equipment and network equipment |
| CN109412665B (en) * | 2018-07-09 | 2022-03-22 | 展讯通信（上海）有限公司 | Channel state indicating and acquiring method, transmitting device, receiving device and medium |
| WO2020010632A1 (en) | 2018-07-13 | 2020-01-16 | Lenovo (Beijing) Limited | Srs configurations and srs transmission |
| WO2021035389A1 (en) * | 2019-08-23 | 2021-03-04 | Qualcomm Incorporated | Dynamic modification of sounding procedure configuration |
| WO2021258400A1 (en) * | 2020-06-27 | 2021-12-30 | Qualcomm Incorporated | Port to antenna mapping for uplink communications |
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| WO2012152000A1 (en) | 2012-11-15 |
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