CN103391631B - The sending method and device of CSI-RS - Google Patents
The sending method and device of CSI-RS Download PDFInfo
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Abstract
The present invention provides a kind of sending method and device of CSI RS, this method includes：Network side is configured according to the Downlink Control Information DCI triggerings of the first UE corresponding to the aperiodic CSI RS of the first UE；The network side generates the aperiodic CSI RS corresponding to the first UE according to the information of the CSI RS configurations, and the aperiodic CSI RS are sent to the first UE.Through the invention, the expense for reducing CSI RS reference signals improves the capacity of system.
Description
Technical field
The present invention relates to the communications fields, in particular to a kind of channel state information reference mark（Channel
State Information-Reference Symbol, referred to as CSI-RS）Sending method and device.
Background technology
In wireless communication technique, base station side（For example, the node B of evolution, i.e. eNodeB, referred to as eNB）Use more
When antenna transmission data, the mode of spatial reuse can be taken to improve message transmission rate, that is, to be used in transmitting terminal identical
Running time-frequency resource emits different data, receiving terminal in different aerial positions（Such as user equipment, that is, UserEquipment,
Referred to as UE）Also data are received using more antennas.
The resource of all antennas is distributed on same user in the case of single user, this user is in a transmission intercal
Inside occupy the physical resource for distributing to base station side alone, this transmission mode is known as single user multiple-input, multiple-output（Single User
Multiple-Input Multiple-Out-put, referred to as SU-MIMO）；By the sky of different antennae in the case of multi-user
Between resource allocation to different user, a user and at least one other user distribute the sharing base side in a transmission intercal
Physical resource, sharing mode can be space division multiple access mode or space division multiplexing mode, and this transmission mode is known as multi-user
Multiple-input, multiple-output（Multiple User Multiple-Input Multiple-Out-put, referred to as MU-MIMO）, wherein base
The physical resource that side is distributed of standing refers to running time-frequency resource.
If Transmission system will support SU-MIMO and MU-MIMO, eNB to need to provide under both patterns to UE simultaneously
Data.UE is both needed to know eNB for the order used in UE transmission MIMO data in SU-MIMO patterns or MU-MIMO patterns
（Rank）.
Under SU-MIMO patterns, the resource of all antennas is distributed on same user, transmits the number of plies used in MIMO data
It is equal to orders of the eNB used in transmission MIMO data；Under MU-MIMO patterns, the corresponding user transmission number of plies used is few
Total number of plies of MIMO data is transmitted in eNB, if to carry out SU-MIMO patterns and the switching of MU-MIMO, eNB is needed in difference
Transmission mode sends a notice control data different UE.
In long evolving system（Long Term Evolution, referred to as LTE）In, reflect down physical channel state
Information（Channel State Information, referred to as CSI）Including 3 partial contents：Channel quality indicates
（Channels quality indication, referred to as CQI）, pre-coding matrix instruction（Pre-coding Matrix
Indicator, referred to as PMI）And order instruction（Rank Indicator, referred to as RI）.
Cooperative multipoint transmission（Coordinated multi-point transmission/reception, referred to as
CoMP）It is a kind of raising high rate data transmission coverage area, the skill of cell edge service quality and handling capacity and throughput of system
Art, the technology become the important technology for improving system spectrum utilization rate, have obtained extensive concern.Cooperative multipoint transmission refers to more
A base station collaboration transmission, serves one or more user terminals（UE）.
Third generation partner program（3rd Generation Partnership Project, referred to as 3GPP）Agreement
Defined CoMP's includes：
（1）Combined Treatment（Joint Processing, referred to as JP）
Data can be used on the base station of collaboration set；Including 2 kinds：
（i）Joint transmission（Joint Transmission, referred to as JT）, that is, in each collaboration set（Whole or portion
Point）Base station is to UE transmission datas；The base station of cooperation to UE simultaneously transmission data（It is related or uncorrelated）, signal matter is received to improve
Amount or actively interference of the elimination to other UE.
（ii）Dynamic cell selection（Dynamic Cell Selection, referred to as DCS）：One in CoMP collaboration sets
Base station is to UE transmission datas.
（2）Cooperative scheduling/wave beam forming（Coordinated Scheduling/Beamforming, referred to as CS/CB）
Multipoint cooperative scheduling/wave beam forming passes through interaction scheduling information between adjacent node so that each cell transmission
Interference between signal is coordinated, or is reduced by wave beam forming and interfered.
In the related art, the process flow of CoMP is：Network side configures measuring assembly, and terminal is carried out according to measuring assembly
Reference Signal Received Power（Reference Signal Received Power, referred to as RSRP）Or reference signal receives matter
Amount（Reference Signal Received Quality, referred to as RSRQ）Or received signal strength indicator（Received
Signal Strength Indicator, referred to as RSSI）Measurement and obtain measurement result.Based on the measurement result, by net
Network side or terminal determine multipoint cooperative measuring assembly；And the measurement of channel status is carried out based on determining multipoint cooperative measuring assembly
And feedback.
Transmission node（Transmission Point, referred to as TP）It is referred to as sending node, it is of the present invention
Transmission node can be macrocell（Macro cell）, relay station（relay）, Microcell（pico cell）Or picocell
（femto cell）Or Home eNodeB Home（e）NodeB etc..
The typical scene can also be a kind of distributing antenna system（Distributed Antennas System, letter
Referred to as DAS）, which is a kind of non-homogeneous or non-unified network（Heterogeneous network）, including a macro station
Marco and multiple far end radio frequency heads（Remote Radio Head, referred to as RRH）（Or remote radio unit (RRU), i.e. Remote
Radio Unit, referred to as RRU）, these sending nodes share identical cell ID（Cell ID）.UE can be received
The signal of Marco and RRH, it is expected that Macro and RRH carries out cooperation transmission.
In order to support cooperative multipoint transmission COMP, each UE to need to measure CSI-RS in multiple CSI-RS resource.
Traditional CSI-RS is period assignment and sends, and is dramatically increased so as to cause CSI-RS resource expense, reference signal resource
Increase mean the reduction of transmission data, eventually lead to being remarkably decreased for system effectiveness.
Invention content
The main purpose of the present invention is to provide a kind of transmission schemes of CSI-RS, at least to solve CSI- in the related technology
The problem that RS resource overheads are big, system effectiveness is low.
According to an aspect of the invention, there is provided a kind of sending method of CSI-RS, including：Network side is according to the first UE
Downlink Control Information DCI triggering configured corresponding to the aperiodic CSI-RS of the first UE；The network side is matched according to the CSI-RS
The information set generates the aperiodic CSI-RS corresponding to the first UE, and the aperiodic CSI-RS is sent to the first UE.
Preferably, after the aperiodic CSI-RS is sent to the first UE by network side, the above method further includes：When this is non-
When period CSI-RS is the CSI-RS of non-zero power, the first UE carries out channel measurement according to the aperiodic CSI-RS, is corresponded to
In the channel state information CSI of the first UE.
Preferably, after the aperiodic CSI-RS is sent to the first UE by network side, the above method further includes：When this is non-
When period CSI-RS is the CSI-RS of zero energy, the first UE carries out interference measurement according to the aperiodic CSI-RS, according to the period or
The aperiodic non-zero power CSI-RS of person carries out channel measurement, and is obtained according to the result of interference measurement and the result of channel measurement
Corresponding to the CSI of the first UE.
Preferably, after the aperiodic CSI-RS is sent to the first UE by network side, the above method further includes：When this is non-
When period CSI-RS is the signal in interference measurement region, the first UE carries out interference survey according to the aperiodic CSI-RS reference signals
Amount carries out channel measurement according to period or aperiodic non-zero power CSI-RS, and according to the result and channel of interference measurement
The result of measurement obtains the CSI corresponding to the first UE.
Preferably, which is sent to the first UE and includes by network side：The son that network side passes through the fixed cycle
Frame sends aperiodic CSI-RS, wherein the fixed cycle is the integral multiple of 5ms.
Preferably, which is sent to the first UE and includes by network side：Network side passes through the on-fixed period
Subframe sends aperiodic CSI-RS.
Preferably, the above method further includes：Network side is that the 2nd UE configures CSI-RS, and is sent and corresponded to by same subframe
CSI-RS in the first UE and CSI-RS corresponding to the 2nd UE.
Preferably, the above method further includes：Network side is that the 2nd UE configures CSI-RS, and passes through different subframe transmissions pair
It should the CSI-RS in the first UE and CSI-RS corresponding to the 2nd UE.
Preferably, the CSI-RS corresponding to the 2nd UE is the CSI-RS or aperiodic CSI-RS in period.
According to another aspect of the present invention, a kind of sending device of CSI-RS is additionally provided, including：Trigger module is used
It is configured in the aperiodic CSI-RS according to the DCI of the first UE triggerings corresponding to the first UE；Generation module, for according to the CSI-
The information of RS configurations generates the aperiodic CSI-RS corresponding to the first UE；Sending module, for sending the aperiodic CSI-RS
To the first UE.
Preferably, when aperiodic CSI-RS is the CSI-RS of non-zero power, the first UE is carried out according to aperiodic CSI-RS
Channel measurement obtains the channel state information CSI corresponding to the first UE.
Preferably, when aperiodic CSI-RS is the CSI-RS of zero energy, the first UE is done according to aperiodic CSI-RS
Disturb measurement, channel measurement carried out according to period or aperiodic non-zero power CSI-RS, and according to the result of interference measurement and
The result of channel measurement obtains the CSI corresponding to the first UE.
Preferably, when aperiodic CSI-RS is the signal in interference measurement region, the first UE joins according to aperiodic CSI-RS
It examines signal and carries out interference measurement, channel measurement is carried out according to period or aperiodic non-zero power CSI-RS, and according to interference
The result of measurement and the result of channel measurement obtain the CSI corresponding to the first UE.
Preferably, sending module is used to send aperiodic CSI-RS by the subframe of fixed cycle, wherein the fixed cycle is
The integral multiple of 5ms.
Preferably, sending module is used to send aperiodic CSI-RS by the subframe in on-fixed period.
Preferably, above-mentioned apparatus further includes：Configuration module, for configuring CSI-RS for the 2nd UE；Sending module is for leading to
It crosses same subframe and sends the CSI-RS for corresponding to the first UE and the CSI-RS corresponding to the 2nd UE.
Preferably, above-mentioned apparatus further includes：Configuration module, for configuring CSI-RS for the 2nd UE；Sending module, for leading to
It crosses different subframes and sends the CSI-RS for corresponding to the first UE and the CSI-RS corresponding to the 2nd UE.
Preferably, the CSI-RS corresponding to the 2nd UE is the CSI-RS or aperiodic CSI-RS in period.
Through the invention, aperiodic CSI-RS is configured and generated according to the DCI of UE using network side, this is aperiodic
CSI-RS is sent to the mode of UE, solves the problems, such as that CSI-RS resource expense is big in the related technology, system effectiveness is low, Jin Erda
It has arrived the expense for reducing CSI-RS reference signals and has improved the effect of the capacity of system.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of the sending method of the CSI-RS of the embodiment of the present invention；
Fig. 2 is the flow chart of the sending method of the CSI-RS of the embodiment of the present invention one；
Fig. 3 is the schematic diagram of the subframe of the carrying CSI-RS of the embodiment of the present invention two；
Fig. 4 is the schematic diagram of the subframe of the carrying CSI-RS of the embodiment of the present invention three；
Fig. 5 is the schematic diagram of the subframe of the carrying CSI-RS of the embodiment of the present invention four；
Fig. 6 is the structure diagram of the sending device of the CSI-RS of the embodiment of the present invention.
Specific implementation mode
Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.
An embodiment of the present invention provides the method that the configuration of CSI-RS a kind of is sent, this method can be applied in network side
（For example, eNodeB or other network side elements）, it is scarce that this method can be used for overcoming CSI-RS resource expense to dramatically increase
It falls into.
Fig. 1 is the flow chart of the sending method of CSI-RS according to the ... of the embodiment of the present invention, as shown in Figure 1, this method includes：
Step S102, network side is according to the Downlink Control Information of the first user equipment (UE)（Downlink Control
Information, referred to as DCI）Triggering is configured corresponding to the aperiodic CSI-RS of the first UE；
Step S104, network side generate the aperiodic CSI-RS corresponding to the first UE according to the information that the CSI-RS is configured,
And the aperiodic CSI-RS is sent to the first UE.
In the present embodiment, network side configures according to the DCI of UE and generates aperiodic CSI-RS, this is aperiodic
CSI-RS is sent to UE, in this way, UE triggers aperiodic CSI-RS reference signals as needed, to overcome CSI-RS resource
The defect that expense dramatically increases.
Wherein, opposite network side sends the DCI's to the first UE at the time of network side sends the aperiodic CSI-RS
Delay certain Shi Keyou；In other words, at the time of UE receives the aperiodic CSI-RS the above-mentioned DCI is received with respect to the first UE
At the time of have certain delay.
Wherein, if CSI-RS signal does not have stringent period-luminosity relation, which belongs to aperiodic CSI-
RS signals.For example, a period CSI-RS signal off and on also belongs to nonperiodic signal.
In a preferred implementation of the embodiment of the present invention, aperiodic CSI-RS is sent to the first UE in network side
Later, following operate can also be carried out：When aperiodic CSI-RS is the CSI-RS of non-zero power, the first UE is aperiodic according to this
CSI-RS carries out channel measurement, to obtain the CSI corresponding to the first UE.By the embodiment, UE, which is realized, uses non-zero power
The CSI-RS of rate carries out channel measurement.
In another preferred implementation of the embodiment of the present invention, aperiodic CSI-RS is sent to first in network side
After UE, following operate can also be carried out：If aperiodic CSI-RS is the CSI-RS of zero energy, the first UE is according to aperiodic
CSI-RS carries out interference measurement, and channel measurement is carried out according to period or aperiodic non-zero power CSI-RS, then, according to dry
The result of the result and channel measurement of disturbing measurement obtains the CSI corresponding to the first UE.By the embodiment, UE is realized using zero
The CSI-RS of power carries out interference measurement.
In another preferred implementation of the embodiment of the present invention, aperiodic CSI-RS is sent to first in network side
After UE, following operate can also be carried out：If aperiodic CSI-RS is interference measurement region（Intereference
Measurement Region, referred to as IMR）Signal, then the first UE can be carried out according to aperiodic CSI-RS reference signals
Interference measurement carries out channel measurement, then, according to the knot of interference measurement according to period or aperiodic non-zero power CSI-RS
The result of fruit and channel measurement obtains the CSI corresponding to the first UE.Wherein, interference measurement region can be the CSI- of zero energy
RS.By the embodiment, UE is realized carries out interference measurement using interference measurement region.
In step S104, aperiodic CSI-RS is sent to the first UE and can be accomplished by the following way by network side：
Mode one, network side send aperiodic CSI-RS by the subframe of fixed cycle, wherein the fixed cycle is 5ms
Integral multiple（For example, 5ms）.
Mode two, network side send aperiodic CSI-RS by the subframe in on-fixed period.
By above-described embodiment, aperiodic CSI-RS can be sent to the first UE by network side.
Preferably, network side can also be that the 2nd UE configures CSI-RS, then, sent in same subframe and correspond to first
The CSI-RS of UE and CSI-RS corresponding to the 2nd UE.In addition, network side can also be sent by different subframes corresponds to the
The CSI-RS of one UE and CSI-RS corresponding to the 2nd UE.This embodiment offers the modes that CSI-RS is sent for different UE.
Preferably, the above-mentioned CSI-RS for corresponding to the 2nd UE can be the CSI-RS in period, can also be aperiodic
CSI-RS.It can be seen that network side can simultaneously sending cycle CSI-RS and aperiodic CSI-RS, can also only send non-
The CSI-RS in period.The embodiment has the advantages that realize simple.
Compared with period CSI-RS channel measurement technology in the related technology, the technical solution of the embodiment of the present invention can answer
For cooperative multicast system or distributing antenna system, solve the problems, such as that CSI-RS expenses are too big in COMP technologies,
It avoids being affected by this and reducing system performance.
The realization process of the present invention is specifically described below by specific embodiment.
Embodiment one
The embodiment of the present invention additionally provides a kind of sending method of CSI-RS, and Fig. 2 is according to embodiments of the present invention one
The flow chart of the sending method of CSI-RS, as shown in Fig. 2, this method includes：
Step S202, network side is according to UEiDownlink Control Information trigger one towards UEiAperiodic CSI-RS match
It sets, wherein UEiIndicate i-th of user；
Step S204, network are generated according to CSI-RS configuration information towards UEiAperiodic CSI-RS reference signals, and will
The reference signal is sent to UEi；
Step S206, UEiChannel measurement and/or interference measurement, and root are carried out according to the aperiodic CSI-RS reference signals
Channel state information CSI is obtained according to the result of measurementi。
Wherein, step S206 can have following three kinds of realization methods：
Realization method one, if the aperiodic CSI-RS reference signals are the CSI-RS signal of non-zero power, UEiIt is non-according to this
Period CSI-RS reference signal carries out channel measurement, obtains channel state information CSIi。
Realization method two, if the aperiodic CSI-RS reference signals are the CSI-RS signal of zero energy, UEi is according to this
Aperiodic CSI-RS reference signals carry out interference measurement, and channel survey is carried out according to period or aperiodic non-zero power CSI-RS
Amount, and channel state information CSI is obtained according to the result of channel measurement and the result of interference measurementi。
Realization method three, when the aperiodic CSI-RS reference signals are the CSI-RS signal in interference measurement region, UEiAccording to
The aperiodic CSI-RS reference signals carry out interference measurement, and channel is carried out according to period or aperiodic non-zero power CSI-RS
It measures, and channel state information CSI is obtained according to the result of channel measurement and the result of interference measurementi。
Preferably, all aperiodic CSI-RS reference signals can appear in the subframe of fixed cycle, can also
It appears in the subframe in on-fixed period；Wherein, which is the integral multiple of 5ms or 5ms.
Wherein, network side can be another UEjThe CSI-RS signal of configuration；UEiAperiodic CSI signals and UEjWeek
Phase CSI signal can simultaneously appear in same subframe, can also appear in different subframes.
Preferably, another UEjThe CSI-RS signal of configuration can be aperiodic either the period.
It may be noted that the sending time versus downstream of the CSI-RS of triggering controls information generated time and is to have certain prolong
Slow, generally there is the delay of several subframes.
Wherein, the transmission node of network side can be a macro base station (Macro), a micro-base station（Pico）, in one
After（Relay）, a less radio-frequency distal end（RRH）Or one family base station（Femto）Deng.
It should be noted that for above-mentioned UE, one in a distributing antenna system or cooperative multicast system
Transmission node TP corresponds to one or more CSI-RS resource or a CSI-RS resource corresponds to distributing antenna system or association
Make multiple transmission node TP in multicast system.
Through the embodiment of the present invention, it when overcoming in COMP technologies UE and carrying out channel measurement or interference measurement, used
More CSI-RS reference signal resources and the problem of cause system effectiveness to decline, improve the service efficiency of CSI-RS, increase
The handling capacity of network.
Embodiment two
An embodiment of the present invention provides a kind of sending method of CSI-RS, this method includes：
Step 1, network side is according to UEiDownlink Control Information DCIiTriggering one is towards UEiAperiodic CSI-RS match
It sets；Wherein, UEiIndicate i-th of user；
Step 2, network side is generated according to the CSI-RS configuration information towards UEiAperiodic CSI-RS reference signals, and
The reference signal is sent to UEi；
Step 3, UEiChannel measurement is carried out according to the aperiodic CSI-RS reference signals, and is obtained according to the result of measurement
Channel state information CSIi.Wherein, which is the CSI-RS signal of non-zero power, and UEiAccording to non-
Period CSI-RS reference signal carries out channel measurement, obtains channel state information CSIi。
Wherein, all aperiodic CSI-RS reference signals can appear in the subframe of fixed cycle, which can
Think the integral multiple of 5ms or 5ms.
In the present embodiment, network side is another UEjThe CSI-RS signal of configuration, UEiAperiodic CSI signals and UEj
Period CSI-RS signal appear in different subframes.Wherein, UEjThe CSI-RS signal of configuration is also aperiodic CSI-RS
Signal generates process and is similar to UEiCSI-RS generation process.
The realization process of the present embodiment is described in more detail below by a specific example, in this example,
Aperiodic CSI-RS is used for channel measurement, and the aperiodic CSI-RS of different UE triggerings is appeared in different subframes, such as Fig. 3 institutes
Show.
Assuming that there are three transmission nodes, respectively TP1, TP2 and TP3 for current network side；There are two terminals for end side, respectively
For UE1 and UE2, the support to the related joint transmission of COMP is realized.
Network side, which receives, comes from UEiDescending control information format 0 or descending control information format 4, and according to
UCIiTriggering one is towards UEiAperiodic CSI-RS configuration, wherein i=1 and 2；
Network is generated according to the CSI-RS configuration information towards UEiAperiodic CSI-RS reference signals, and by the reference
Signal is sent to UEi。
Preferably, which is the CSI-RS reference signals of non-zero power, and UEiIt is non-according to this
Period CSI-RS reference signal carries out channel measurement, obtains channel state information CSIi, wherein i=1 and 2.
Network side is that terminal UE 1 is configured with five CSI-RS reference signals, and for UE1, TP1 and TP3 constitute survey
The description of quantum collection, this five reference signals includes：
1. the first CSI-RS configuration information is configured with the non-zero power of first transmission node TP1 to UE1 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 0, and the period is 5ms, has 2 antenna ports；
2. the second CSI-RS configuration information is configured with non-zero powers of the third transmission node TP3 to UE1 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 5, and the period is 10ms, has 2 antenna ports；
3. third CSI-RS configuration information is configured with the zero energy of second transmission node TP2 to UE1 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 0, and the period is 10ms, has 2 antenna ports, is mainly used for speed
Rate matches, and evades interference；
4. the 4th CSI-RS configuration information is configured with the reserved location of aperiodic CSI-RS, that is to say, that only at this
Just allow to send aperiodic CSI-RS on a little positions, reserved location is period subframe position herein, has and is similar to period CSI-
The sub-frame offset of the subframe position of RS signals, reserved location is 0, and the period is 10ms, has 4 antenna ports；
5. the 5th CSI-RS configuration information, which is configured with TP1 and TP3, combines the CSI- for sending aperiodic non-zero power to UE1
RS reference signals, the CSI-RS signal are triggered by ascending control information, are sent in subframe 7, have 4 antenna ports,
Transparent polymeric for TP1 and TP3 is fed back, for related joint transmission in COMP technologies（coherent joint
transmission）.
Wherein, there is a COMP measuring assembly here, which is made of TP1 and TP3.
Network side is that terminal UE 2 is configured with five CSI-RS reference signals, and for UE1, TP1 and TP3 constitute survey
The description of quantum collection, this five reference signals includes：
1. the first CSI-RS configuration information is configured with the non-zero power of first transmission node TP1 to UE2 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 0, and the period is 5ms, has 2 antenna ports；
2. the second CSI-RS configuration information is configured with non-zero powers of the third transmission node TP3 to UE1 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 0, and the period is 10ms, has 2 antenna ports；
3. third CSI-RS configuration information is configured with the zero energy of second transmission node TP3 to UE1 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 5, and the period is 10ms, has 2 antenna ports, is mainly used for speed
Rate matches, and evades interference；
4. the 4th CSI-RS configuration information is configured with the reserved location of aperiodic CSI-RS, that is to say, that only at this
Just allow to send aperiodic CSI-RS on a little positions, reserved location is period subframe position herein, has and is similar to period CSI-
The subframe position of RS signals, can be towards any UE（Such as UE1 and UE2）, the sub-frame offset of reserved location is 2, and the period is 5ms,
With 4 antenna ports；
5. the 5th CSI-RS configuration information, which is configured with TP1 and TP2, combines the CSI- for sending aperiodic non-zero power to UE1
RS reference signals, the CSI-RS signal are triggered by ascending control information, are sent in the 12nd subframe, have 4 antennas
Port, the transparent polymeric for TP1 and TP2 are fed back, for related joint transmission in COMP technologies.
It should be noted that subframe number herein is since 0.
Embodiment three
The main contents and embodiment two of the present embodiment are identical, the difference is that：In embodiment two, UEiNon- week
Phase CSI-RS signal and UEjPeriod CSI-RS signal appear in different subframes, and in the present embodiment, UEiIt is aperiodic
CSI-RS signal and UEjPeriod CSI-RS signal appear in identical subframe.
The realization process of the present embodiment is described in more detail below by a specific example, in the embodiment
In, aperiodic CSI-RS is used for channel measurement, and the aperiodic CSI-RS of different UE triggerings is appeared in identical subframe, such as schemed
Shown in 4.
The content of this example and the specific example in embodiment two is essentially identical, and network side all gives end side（Can be
UE1 can also be UE2）Five CSI-RS reference signals are configured with, 1,2,3,5 in five reference signals in the present embodiment
It is identical with 1,2,3,5 in five reference signals in embodiment two.The difference of two specific examples includes：For five
4 in reference signal, the reserved location in embodiment two supports 4 antenna ports, and this example supports 8 antenna ports.
In two specific examples, network side all gives end side（It can be UE1, can also be UE2）It is configured with five CSI-
RS reference signals, 1 in five reference signals in 1,2,3 and embodiment two in five reference signals in the present embodiment,
2,3 is identical.The difference of two specific examples includes：For 4 in five reference signals, the reserved location branch of embodiment two
4 antenna ports are held, and the present embodiment supports 8 antenna ports；For 5 in five reference signals, the subframe position of embodiment two
It is the 12nd subframe, and the present embodiment is subframe 7.Therefore, the aperiodic CSI-RS signal of UE1 and UE2 appears in same subframe
In.It should be pointed out that UE1 and UE2 may use identical physical resource, different physical resources can also be used.
In addition, in the present embodiment, subframe number is since 0.
Example IV
An embodiment of the present invention provides a kind of sending method of CSI-RS, this method includes：
Step 1, network side is according to UEiDownlink Control Information DCIiTriggering one is towards UEiAperiodic CSI-RS match
It sets；Wherein, UEiIndicate i-th of user；
Step 2, network is generated according to the CSI-RS configuration information towards UEiAperiodic CSI-RS reference signals, and will
The reference signal is sent to UEi；
Step 3, UEiInterference measurement is carried out according to the aperiodic CSI-RS reference signals, according to period or aperiodic
Non-zero power CSI-RS carries out channel measurement, and obtains channel status letter according to the result of channel measurement and the result of interference measurement
Cease CSIi.Wherein, which is the CSI-RS signal of zero energy or the signal in interference measurement region,
And UEiInterference measurement is carried out according to the aperiodic CSI-RS reference signals, and according to the knot of interference measurement results and channel measurement
Fruit obtains channel state information CSIi。
Preferably, all aperiodic CSI-RS reference signals appear in the subframe of fixed cycle；Wherein, the period
For the integral multiple of 5ms or 5ms.
Wherein, network side is another UEjConfigure CSI-RS signal；UEiAperiodic CSI-RS signal and UEjPeriod
CSI-RS signal appears in different subframes.Wherein, UEjThe CSI-RS signal of configuration is also aperiodic CSI-RS signal,
It generates process and is similar to UEiAperiodic CSI-RS signal（Also become CSI-RS reference signals or CSI-RS）Generation
Journey.
Wherein, which is also used for interference measurement.
The realization process of the present embodiment is illustrated below by a specific example, it is in this example, aperiodic
CSI-RS is used for interference measurement, and the aperiodic CSI-RS of different UE triggerings is appeared in different subframes, as shown in Figure 5.
Assuming that there are three transmission nodes, respectively TP1, TP2 and TP3 for current network side；There are two terminals for end side, respectively
For UE1 and UE2, the support to the related joint transmission of COMP is realized.
Network side, which receives, comes from UEiDescending control information format 0 or descending control information format 4, and according to
UCIiTriggering one is towards UEiAperiodic CSI-RS configuration, wherein i=1 and 2；
Network is generated according to the CSI-RS configuration information towards UEiAperiodic CSI-RS reference signals, and by the reference
Signal is sent to UEi；
Preferably, which is the CSI-RS signal of non-zero power, UEiIt is aperiodic according to this
CSI-RS reference signals carry out channel measurement, obtain channel state information CSIi, wherein i=1 and 2.
Network side is configured with five CSI-RS reference signals to terminal UE 1, and TP1, TP2 and TP3 are constituted for UE1
The description of measurement Subset, five reference signals includes：
1. the first CSI-RS configuration information is configured with the non-zero power of first transmission node TP1 to UE1 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 0, and the period is 5ms, has 2 antenna ports；
2. the second CSI-RS configuration information is configured with the non-zero power of second transmission node TP2 to UE1 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 0, and the period is 10ms, has 2 antenna ports；
3. third CSI-RS configuration information is configured with non-zero powers of the third transmission node TP3 to UE1 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 5, and the period is 10ms, has 2 antenna ports；
4. the 4th CSI-RS configuration information is configured with the reserved location of aperiodic CSI-RS, that is to say, that only at this
Just allow to send aperiodic CSI-RS on a little positions, reserved location herein is period subframe position, has and is similar to the period
The sub-frame offset of the subframe position of CSI-RS signal, reserved location is 2, and the period is 5ms, has 4 antenna ports；
5. the 5th CSI-RS configuration information, which is configured with TP1, TP2 and TP3, combines to UE1 and sends aperiodic zero energy
CSI-RS reference signals, the CSI-RS signal are triggered by ascending control information, are sent in subframe 7, have 4 antenna ends
Mouthful, the channel state information for obtaining COMP transmission.
Network side is configured with five CSI-RS reference signals to terminal UE 2, and for UE1, TP1 and TP2 constitute survey
The description of quantum collection, this five reference signals includes：
1. the first CSI-RS configuration information is configured with the non-zero power of first transmission node TP1 to UE2 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 0, and the period is 5ms, has 2 antenna ports；
2. the second CSI-RS configuration information is configured with the non-zero power of second transmission node TP2 to UE1 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 0, and the period is 10ms, has 2 antenna ports；
3. third CSI-RS configuration information is configured with zero energys of the third transmission node TP3 to UE1 sending cycles
The sub-frame offset of CSI-RS reference signals, the reference signal is 5, and the period is 10ms, has 2 antenna ports, is mainly used for speed
Rate matches, and evades interference；
4. the 4th CSI-RS configuration information is configured with the reserved location of aperiodic CSI-RS, that is to say, that only at this
Just allow to send aperiodic CSI-RS on a little positions, reserved location herein is period subframe position, has and is similar to the period
The sub-frame offset of the subframe position of CSI-RS signal, reserved location is 5, and the period is 10ms, has 4 antenna ports；
5. the 5th CSI-RS configuration information, which is configured with TP1 and TP2, combines the CSI-RS for sending aperiodic zero energy to UE1
The signal in reference signal or interference measurement region, which triggered by ascending control information, in the 12nd son
It is sent on frame, there are 4 antenna ports, for there are TP3 interference but without interference measurement under TP1 and TP2 disturbed conditions, using
In the channel state information for obtaining COMP.
It should be noted that in this example, subframe number is since 0.
Example IV
The embodiments of the present invention also provide a kind of sending device of CSI-RS, which can be used for network side, the dress
It sets and above method embodiment may be implemented.
Fig. 6 is the structure diagram of the sending device of CSI-RS according to the ... of the embodiment of the present invention, as shown in fig. 6, the device packet
It includes：
Trigger module 62, for corresponding to the aperiodic of the first UE according to the Downlink Control Information DCI triggerings of the first UE
CSI-RS is configured；Generation module 64 is coupled to trigger module 62, and the information for configure according to the CSI-RS is generated corresponding to the
The aperiodic CSI-RS of one UE；Sending module 66 is coupled to generation module 64, for the aperiodic CSI-RS to be sent to first
UE。
Preferably, when aperiodic CSI-RS is the CSI-RS of non-zero power, above-mentioned first UE is used for aperiodic according to this
CSI-RS carries out channel measurement, to obtain the CSI corresponding to the first UE.
Preferably, when aperiodic CSI-RS is the CSI-RS of zero energy, above-mentioned first UE is used for according to aperiodic CSI-
RS carries out interference measurement, carries out channel measurement according to period or aperiodic non-zero power CSI-RS, and according to interference measurement
Result and channel measurement result obtain corresponding to the first UE CSI.
Preferably, when aperiodic CSI-RS is the signal in interference measurement region, above-mentioned first UE is used for according to aperiodic
CSI-RS reference signals carry out interference measurement, and channel measurement is carried out according to period or aperiodic non-zero power CSI-RS, and
The CSI corresponding to the first UE is obtained according to the result of interference measurement and the result of channel measurement.Wherein, interference measurement region can be with
It is the CSI-RS of zero energy.
Preferably, sending module is used to send aperiodic CSI-RS by the subframe of fixed cycle.
Preferably, sending module is used to send aperiodic CSI-RS by the subframe in on-fixed period.
Preferably, above-mentioned apparatus further includes：Configuration module, for configuring CSI-RS for the 2nd UE；Sending module is used for
The CSI-RS corresponding to the CSI-RS of the first UE and corresponding to the 2nd UE is sent in same subframe.
Preferably, above-mentioned apparatus further includes：Configuration module, for configuring CSI-RS for the 2nd UE；Sending module is used for
The CSI-RS corresponding to the CSI-RS of the first UE and corresponding to the 2nd UE is sent in different subframes.
Preferably, the above-mentioned CSI-RS for corresponding to the 2nd UE can be the CSI-RS in period.
In another embodiment, a kind of transmission software of CSI-RS is additionally provided, the software is for executing above-mentioned reality
Apply the technical solution described in example and preferred embodiment.
In another embodiment, a kind of storage medium is additionally provided, above-mentioned CSI-RS is stored in the memory mechanism
Transmission software.
In conclusion the present invention configures according to the DCI of UE using network side and generates aperiodic CSI-RS, by the non-week
The CSI-RS of phase is sent to the mode of UE so that the method for the present invention and device are adapted to various COMP transmission modes, Ke Yiyou
Effect ground reduces the expense of CSI-RS reference signals, improves the capacity of system, and will not lead to the reduction of CSI accuracys rate.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed by computing device in the storage device, and in some cases, it can be with different from shown in sequence execution herein
The step of going out or describing, either they are fabricated to each integrated circuit modules or by them multiple modules or
Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of sending method of channel state information reference mark CSI-RS, which is characterized in that including：
Network side is according to the Downlink Control Information DCI triggerings of the first user equipment (UE) corresponding to the aperiodic of the first UE
CSI-RS is configured；
The network side generates the aperiodic CSI-RS corresponding to the first UE according to the information that the CSI-RS is configured, and will
The aperiodic CSI-RS is sent to the first UE；
Wherein, the aperiodic CSI-RS is sent to the first UE and includes by the network side：The network side passes through fixation
The subframe in period sends the aperiodic CSI-RS, wherein the fixed cycle is the integral multiple of 5ms；
Or the aperiodic CSI-RS is sent to the first UE and includes by the network side：The network side passes through on-fixed
The subframe in period sends the aperiodic CSI-RS.
2. according to the method described in claim 1, it is characterized in that, the aperiodic CSI-RS is sent in the network side
After first UE, the method further includes：
When the aperiodic CSI-RS is the CSI-RS of non-zero power, the first UE is carried out according to the aperiodic CSI-RS
Channel measurement obtains the channel state information CSI corresponding to the first UE.
3. according to the method described in claim 1, it is characterized in that, the aperiodic CSI-RS is sent in the network side
After first UE, the method further includes：
When the aperiodic CSI-RS is the CSI-RS of zero energy, the first UE is done according to the aperiodic CSI-RS
Measurement is disturbed, channel measurement is carried out according to period or aperiodic non-zero power CSI-RS, and according to the knot of the interference measurement
The result of fruit and the channel measurement obtains the CSI corresponding to the first UE.
4. according to the method described in claim 1, it is characterized in that, the aperiodic CSI-RS is sent in the network side
After first UE, the method further includes：
When the aperiodic CSI-RS is the signal in interference measurement region, the first UE joins according to the aperiodic CSI-RS
It examines signal and carries out interference measurement, channel measurement is carried out according to period or aperiodic non-zero power CSI-RS, and according to described
The result of interference measurement and the result of the channel measurement obtain the CSI corresponding to the first UE.
5. according to the method described in claim 1, it is characterized in that, the method further includes：
The network side be the 2nd UE configure CSI-RS, and by same subframe send corresponding to the first UE CSI-RS and
Corresponding to the CSI-RS of the 2nd UE.
6. according to the method described in claim 1, it is characterized in that, the method further includes：
The network side is that the 2nd UE configures CSI-RS, and sends the CSI-RS corresponding to the first UE by different subframes
With the CSI-RS corresponding to the 2nd UE.
7. method according to claim 5 or 6, which is characterized in that the CSI-RS corresponding to the 2nd UE is the period
CSI-RS or aperiodic CSI-RS.
8. a kind of sending device of channel state information reference mark CSI-RS, which is characterized in that including：
Trigger module, for corresponding to the non-of the first UE according to the Downlink Control Information DCI triggerings of the first user equipment (UE)
The CSI-RS in period is configured；
Generation module, the information for being configured according to the CSI-RS generate the aperiodic CSI-RS corresponding to the first UE；
Sending module, for the aperiodic CSI-RS to be sent to the first UE；
Wherein, the sending module is used to send the aperiodic CSI-RS by the subframe of fixed cycle, wherein the fixation
Period is the integral multiple of 5ms；Or
The sending module is used to send the aperiodic CSI-RS by the subframe in on-fixed period.
9. device according to claim 8, which is characterized in that
When the aperiodic CSI-RS is the CSI-RS of non-zero power, the first UE is carried out according to the aperiodic CSI-RS
Channel measurement obtains the channel state information CSI corresponding to the first UE.
10. device according to claim 8, which is characterized in that
When the aperiodic CSI-RS is the CSI-RS of zero energy, the first UE is done according to the aperiodic CSI-RS
Measurement is disturbed, channel measurement is carried out according to period or aperiodic non-zero power CSI-RS, and according to the knot of the interference measurement
The result of fruit and the channel measurement obtains the CSI corresponding to the first UE.
11. device according to claim 8, which is characterized in that
When the aperiodic CSI-RS is the signal in interference measurement region, the first UE joins according to the aperiodic CSI-RS
It examines signal and carries out interference measurement, channel measurement is carried out according to period or aperiodic non-zero power CSI-RS, and according to described
The result of interference measurement and the result of the channel measurement obtain the CSI corresponding to the first UE.
12. device according to claim 8, which is characterized in that described device further includes：
Configuration module, for configuring CSI-RS for the 2nd UE；
The sending module is used to send corresponding to the CSI-RS of the first UE and corresponding to described second by same subframe
The CSI-RS of UE.
13. device according to claim 8, which is characterized in that described device further includes：
Configuration module, for configuring CSI-RS for the 2nd UE；
The sending module, for sending the CSI-RS corresponding to the first UE by different subframe and corresponding to described the
The CSI-RS of two UE.
14. device according to claim 12 or 13, which is characterized in that the CSI-RS corresponding to the 2nd UE is the period
CSI-RS or aperiodic CSI-RS.
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| CN103797837B (en) * | 2013-11-18 | 2018-06-05 | 华为技术有限公司 | A kind of method, base station and user equipment for improving channel measurement accuracy |
| CN104935389B (en) * | 2014-03-21 | 2020-05-19 | 中兴通讯股份有限公司 | Channel state information measuring method and device |
| CN105790905A (en) * | 2014-12-16 | 2016-07-20 | 北京信威通信技术股份有限公司 | Transmitting method of downlink CSI-RS (Channel State Information-Reference Signal), device and system |
| US10084577B2 (en) * | 2015-01-30 | 2018-09-25 | Motorola Mobility Llc | Method and apparatus for signaling aperiodic channel state indication reference signals for LTE operation |
| CN107135025A (en) | 2016-02-29 | 2017-09-05 | 株式会社Ntt都科摩 | Channel state information reference signals sending method and base station |
| CN107241748A (en) * | 2016-03-28 | 2017-10-10 | 北京信威通信技术股份有限公司 | The interference detecting method of coordinated multipoint transmission, apparatus and system |
| EP3437277A1 (en) * | 2016-03-31 | 2019-02-06 | Docomo Innovations, Inc. | Method of aperiodic signal transmission, base station, and user equipment |
| WO2018006311A1 (en) * | 2016-07-07 | 2018-01-11 | Qualcomm Incorporated | Processing relaxation for aperiodic csi-rs |
| KR20190049693A (en) * | 2016-08-10 | 2019-05-09 | 인터디지탈 패튼 홀딩스, 인크 | System and method for transmitting far-infrared metric reference signals in a multi-antenna system |
| CN110741595B (en) * | 2017-06-14 | 2023-04-25 | 株式会社Ntt都科摩 | Method for allocating frequency resources |
| CN110149178B (en) * | 2018-02-12 | 2020-09-01 | 维沃移动通信有限公司 | Reference signal configuration method, terminal equipment and network side equipment |
| CN113162739B (en) * | 2020-01-23 | 2023-04-25 | 维沃移动通信有限公司 | Measurement reporting and configuration method, terminal and network side equipment |
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