CN107534872A - User equipment to suppress interference ability determination - Google Patents
User equipment to suppress interference ability determination Download PDFInfo
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- CN107534872A CN107534872A CN201580078683.5A CN201580078683A CN107534872A CN 107534872 A CN107534872 A CN 107534872A CN 201580078683 A CN201580078683 A CN 201580078683A CN 107534872 A CN107534872 A CN 107534872A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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Abstract
Discuss method, network node, user equipment and the user equipment method performed at network node.The method performed at network node determines the ability of the interference for the data-signal that user equipment mitigation is sent from network node to other users equipment in the radio plot of network node.Method includes：Send at least one channel reference signal；Interference reference signal to be sent is indicated to user equipment, and the instruction of the time for sending interference reference signal and frequency resource is provided；Send interference reference signal, the data-signal that interference reference signal simulation is sent by network node；And from user equipment receive instruction user equipment to suppress disturb reference signal ability feedback signal.
Description
Technical field
The field of the invention is related to wireless communication system, and more particularly to suppression due to being set with the other users in cell
The caused interference of standby data communication.
Background technology
In the conventional system, when it is determined that transmitting required power, by monitoring the reference signal sent by network node,
Channel quality is determined at user equipment.The feedback signal of channel quality at instruction user equipment is sent to net from user equipment
Network node.The monitoring is based on specific hypothesis and does not consider AF panel.
User equipment can detect and suppress to be sent to the ability of the data-signal of other users equipment depending on user sets
Standby type, and it is particularly depending on the type for the receiver that user equipment may have.Therefore, user equipment pressing down
The ability of system interference depends on user equipment, and significant changes.
Although user equipment of the network node out of its cell receives channel quality instruction, the use of user equipment is not known
To suppress the ability of interference.May extra high situation in the presence of the interference between the transmission to different user devices.For example, providing
In the case that source is rare, network node, which may decide that, is paired together two user equipmenies, and using same or analogous
Precoding sends data-signal to each user equipment.Different power is used for two transmission, and is located most closely to net
The user equipment of network node will receive substantial amounts of interference with higher power from the signal for being sent to other user equipment.This
The transmission of type is referred to as superposed transmission, and can suppress from transmission dependent on the user equipment near network node
To the interference of the data of another user equipment.
Expectation network node understand user equipment to suppress interference ability.
The content of the invention
The first aspect of the present invention provides radio plot being performed at network node, determining the network node
Interior user equipment mitigating the ability of the interference of the data-signal sent from the network node to other users equipment
Method, this method include：Send at least one channel reference signal；Send interference reference signal, interference reference signal simulation
The data-signal sent by network node；And feedback signal is received from user equipment, the feedback signal instruction user equipment
To suppress to disturb the ability of reference signal.
Present inventors have realized that expectation be present determines whether user equipment can mitigate from other data-signals
Interference situation, for example, can be matched in network node to user equipment and use superposed transmission so that the user through pairing
Equipment is at least some time shared frequencies and precoding resource situation.However, the conventional of channel quality determines to be based on specific vacation
If performed for standard reference signal at user equipment, and do not consider user equipment to suppress interference ability.For
Solves this problem, there is provided the additional interference reference signal for the data-signal that simulation is sent by network node.From user
The feedback signal of equipment by provide user equipment to suppress the instruction of the ability of the interference signal, so as in more general terms,
The ability that user equipment mitigates interference of the data-signal to other users equipment is provided.
In this respect, disturb reference signal special with the data-signal identical sent with network node by sending
The randomly or pseudo-randomly signal of property carrys out analog data signal.In this respect, the data-signal that its feature is modeled can be current
The data-signal sent by network node, or it can be that network node is configured as sending and can sending out in the time later
The data-signal sent, these characteristics are predefined or selection the characteristics that network node can be used for data transfer.
In certain embodiments, methods described also includes indicating interference reference signal to be sent to user equipment.
Although some user equipmenies complexity may carry out blind Detecting and suppress interference reference signal enough, in some implementations
In example, the instruction of reference signal to be sent, which can be supplied to, can help it to identify and suppress the user equipment of signal.
In certain embodiments, instruction includes the instruction for providing time and frequency resource, and the interference reference signal will be at this
Sent in time and frequency resource.
There is provided time and frequency resource cause user equipment be able to know that when and wherein monitoring interference reference signal.
The same or similar pre-coding matrix of the data-signal currently transmitted with network node can be used to refer to interference
Signal carries out precoding, or can be pre- for data transfer in the case where network node does not currently send data-signal
The precoding of definition or from available for the precoding selected in the precoding for transmitting this data.Under any circumstance, precoding
The precoding of data-signal can be used for by network node by being so that, and at least some user equipmenies are pre- by identification data signals
Coding, and therefore will can be identified for that and suppress.
In certain embodiments, disturb reference signal as hypothesis data transfer in PDSCH (the shared letters of physical down link
Road) on sent, alternatively, interference reference signal be included in channel reference signal.
In certain embodiments, using the CRS (channel reference signal) or CSI-RS (channel shapes scrambled by virtual subdistrict ID
State information reference signal) sequence, disturb reference signal to be sent as virtual reference signal.Alternatively, disturb reference signal can
To be encoded in the reference signal (being probably CSI-RS or CRS reference signals) sent in itself by network node.
In certain embodiments, wrapped for the subset for the time for sending the channel reference signal, interference reference signal
Include in channel reference signal.In this respect, for the subset of the time sent by network node, only to dry in reference signal
It is probably favourable to disturb reference signal and carry out coding, and the time subset is indicated to user equipment.By this way, not embedding
In the case of the interference reference signal entered, channel reference signal is sent in some times, and can be by legacy User Equipment
Use.
The situation for the instruction that the time and frequency resource for disturbing reference signal can be found in it is provided in network node
Under, then in the case where it is embedded in control signal, the instruction of frequency resource can be simply that it is embedded in the letter
Mark in road reference signal, because user equipment will understand that the frequency of the signal.
In certain embodiments, channel reference signal, which is included in TM10 (transmission mode 10) to be used to identify, comes from adjacent net
The CSI-IM (channel condition information interferometry) of the interference of network node.The signal includes predetermined time and frequency resource, uses
The family monitoring of equipment predetermined time and frequency resource are to determine the received signal level as interference instruction.It is being used as this
In the case that a part for signal sends interference reference signal, interference reference signal is sent in these temporal frequency resource blocks,
And user equipment will be sought to identify the interference reference signal and be suppressed.Its interference level indicated will indicate that it suppresses
The ability of the known disturbances of transmission.
Although the instruction of interference reference signal can be sent to user equipment instruction network node in many ways,
In certain embodiments, indicate that network node will send the instruction of interference reference signal in higher signal, and at some
In the case of, the instruction includes the instruction that interference signal sends the time sent thereon and frequency resource.
In certain embodiments, method is further used as sending at least one in following item including the higher level signal
：The indicating of power, the interference reference signal and at least one channel reference signal of the interference reference signal
Power ratio, scramble sequence, customer equipment identification, precoding and modulation instruction.
Such as ratio, scramble sequence, the Yong Hushe of the power of the power of interference reference signal, its power and channel reference signal
The standby more information for identifying and modulating instruction etc. can be sent in higher level signal.In this respect, there is height in user equipment
In the case of level receiver, it may be necessary to some information in the information come identify and suppress channel disturbance reference signal and/or
Suitable CQI is provided from the reference signal.In LTE (Long Term Evolution), such as on modulating the letter with power
Breath is sent in higher level signal, and the additional information and interference ginseng of temporal frequency resource are therefore provided in such signal
Other characteristics for examining signal are effective.
In certain embodiments, method includes：Multiple interference reference signals are sent, each interference reference signal has following
Different item in：Power, scramble sequence, precoding, customer equipment identification and modulation instruction.
Although single interference reference signal can be sent, in certain embodiments, multiple interference reference signals are sent.Just
For this, in the case where sending multiple signals, multiple signals can each have different property, and user equipment is special
The signal suppressed well can indicate that selection is used for the property of superposition of data transmission.For example, each user equipment can have not
Same modulation, and the response from being received from user equipment is different, and network node can determine that user equipment is best able to press down goodly
Which modulation is made, and it is thus determined that when user equipment and another user equipment match, which modulation is to be used to be sent to this
The more preferable modulation of any data-signal of user equipment.
In certain embodiments, the feedback signal includes one below：CQI and interference level.
Feedback signal from user equipment can be CQI, and CQI is suppressed in interference
It has been determined afterwards.Therefore, this is to suppress how successfully to indicate.It can be alternatively after attempting to suppress to disturb
The interference level of measurement, and the level will turn into how suppression successfully indicates again.Generally, feedback will be that network node closes
The instruction of the user equipment is successfully transmitted data in the data channel using the characteristic with interference reference signal.On
CQI, in certain embodiments, it simply indicates the channel quality with inhibited interference reference signal
Whether required 10%BLER (block error rate) is higher than.
In certain embodiments, before the interference reference signal is sent to the user equipment indicating concurrent, the side
Method comprises the following steps：Determine in the cell including operable to suppress the use of the receiver of at least some data interference
A part for family equipment is higher than predetermined level.
It is expense to send interference reference signal, and can also increase the interference to other users equipment.It there may be network
Node requires no knowledge about the situation whether user equipment can be suppressed to the interference data signal of other users equipment, and at this
In the case of kind, sending the expense of interference reference signal should be avoided by.Therefore, in some cases, before sending these signals,
Network node determine user equipment in radio plot with the presence or absence of it is a high proportion of, there are Advanced receivers and can
Suppress the user equipment of interference.In this respect, the interference from any kind of data-signal can not be suppressed in user equipment
In the case of, determine user equipment is unworthy to suppress the ability of certain interference.Network node can be by controlling
The information sent during signaling processed understands UE capability.Therefore, network node can be based on having height in radio plot
The quantity of the user equipment of level receiver disturbs reference signal to decide whether to start to send.
In certain embodiments, method includes：In response to indicating that the user equipment can effectively suppress the interference
The feedback signal of signal, transmit data to the user equipment and using the same time in superposed transmission, frequency and
Precoding resource transmits data to another user equipment.
When network node has determined that user equipment can effectively suppress interference, then it can be directed to and be set to the user
The standby and transmission of another user equipment, decision use superposed transmission.In this respect, the characteristic of the superposed transmission can be with origin certainly
The feedback of user equipment determines.Superposed transmission be directed to two user equipmenies transmission, using the same or analogous time,
Frequency and precoding resource, and dependent on closer to user equipment can suppress due to interference of the signal to another user equipment
Ability.Therefore, nearer user equipment should be able to be identified to the data transfer of another user equipment, and be eliminated or at least
Suppressed.
In certain embodiments, the user equipment and institute are chosen according to from the feedback of the user equipment
State the power of the transmission of another user equipment.
Feedback from user equipment can allow to determine to be used for the suitable power to another user device transmissions.
In this respect, user equipment to suppress the capacity of the interference in data-signal to another user equipment can be used for it is another
The transimission power of user equipment.In some cases, interference reference signal is embedded in channel reference signal, and a certain amount of
Power be used for reference signal, and other amount be used to disturb reference signal.If user equipment can suppress to disturb
Reference signal and reference signal is successfully decoded with these power levels, then these power levels are that user equipment can suppress dry
Disturb and be properly received the instruction of the power level of signal.
The second aspect of the present invention provides network node, for providing user equipment of the support in radio plot
Radio covers, and the network node includes transmitter, and transmitter is operable to send at least one channel reference signal and can
To send interference reference signal, the interference reference signal simulates the data-signal sent by the network node for operation；It is described
Network node also includes receiver, and receiver is operable to receive feedback signal from user equipment, described in feedback signal instruction
User equipment to suppress it is described interference reference signal the ability.
In certain embodiments, the network node is operable indicates the interference reference signal to be sent to user equipment
The signal that will be sent, and in certain embodiments, the signal provides the instruction for sending time and frequency resource, the interference
Reference signal will be sent wherein.
The third aspect of the present invention provides the method performed at user equipment, and method includes：Received from network node
The network node will send the instruction of the interference reference signal of analog data signal on the scheduled time and frequency resource；Monitoring
The time and frequency resource through instruction, and suppress to send within the time and frequency resource has data-signal special
The signal of property；When the interference reference signal is suppressed, the residue signal received in the time and frequency resource is sent in
Intensity instruction.
User equipment receives network node from network node will send time and the frequency of interference reference signal and its transmission
The instruction of rate resource.Then user equipment will monitor the time and frequency resource, and if identify in time and frequency money
The signal with data-signal characteristic sent in source, then will suppress the signal.Then, the time and frequency resource will be sent in
The instruction of the intensity for any residue signal inside having been received by.Therefore, the instruction of the intensity of residue signal will be that user sets
The standby instruction for how successfully suppressing interference signal.In this respect, if the data-signal can not be identified, then will not be able to press down
Make the signal.
In certain embodiments, the instruction of remnant signal strength can take CQI or interference signal level
Form.
In this respect, user equipment can be configured to respond to receive reference signal and indicate channel to network node
Quality.The channel quality signal can be the instruction of the desired signal intensity compared with interference level, or can be remaining letter
Number meet the instruction of some block error rate requirements (for example, 10% block error rate).Obviously, user equipment suppressing to disturb
The ability of reference signal-to-interference indicates the channel quality for influenceing its transmission.In some cases, if reference signal is CRS-
IM signals, then interference level will be returned.The level will depend again on user equipment can be to being sent by network node
The amount of suppression for disturbing reference signal to perform.
In certain embodiments, user equipment can receive multiple interference reference signals, and will in response to these signals
Send multiple feedback signals.These feedback signals can will preferably suppress multiple with reference to letter to network node instruction user equipment
Which of number.In this respect, multiple reference signals are by with characteristic different from each other.In this respect, they can be by not
With ground precoding, they can have the power level or power ratio different from reference signal, and they can have different add
Disturb sequence and/or different modulation.Reception from each feedback signal allows network node to determine which characteristic is used to send out
Send data.I.e., it is possible to user equipment is selected most preferably to suppress the characteristic disturbed.
The fourth aspect of the present invention provides user equipment, and user equipment includes：Receiver, it is operable with from network node
The instruction of interference reference signal of analog data signal will be sent on the scheduled time and frequency resource by receiving the network node；
Observation circuit, it is operable to monitor the time of the instruction and frequency resource；And suppression circuit, it is operable with suppress described
The signal with data-signal characteristic sent in time and frequency resource；Transmitter, it is operable with the interference reference letter
When number suppressed, the instruction of the intensity of the residue signal received in the time and frequency resource is sent in.
The fifth aspect of the present invention provide when executed by a computer it is operable with control computer come perform according to this
The computer program product of the first aspect of invention or the method for the third aspect.
Further specific and preferable aspect is elaborated in appended independence and dependent claims.Dependent claims
Feature can suitably with independent claims combinations of features, and can with outside the feature of clear stipulaties in claim
Combinations of features.
Device characteristic be described as it is operable to provide function in the case of, it will be appreciated that this include provide the function
Or it is adapted to or is configured to supply the device characteristic of the function.
Brief description of the drawings
Embodiments of the invention are further described referring now to accompanying drawing, wherein：
Fig. 1 shows superposed transmission；
Fig. 2 shows flow chart of the diagram according to embodiment network node goes out the method for execution the step of；
Fig. 3 shows flow chart user equipment at the method for execution the step of of the diagram according to embodiment.
Embodiment
Before embodiment is discussed in more detail, general introduction will be provided first.
Network node determines that the ability for this interference of Interference and its suppression that user equipment can suffer from is typically complicated.
User equipment positioned at radio plot edge will suffer from the interference from adjacent network node.Interference for neighbor cell subtracts
It is gently complicated, and needs the cooperation between network node.However, in addition to this interference, also exist by network node
Interference to the data transfers of the different user devices in cell itself.If network node is known and controls these communications, this
A little interference can more easily be determined and mitigated.However, network node may be unaware that special user equipment suppressing this
The ability of kind interference, and which has limited the ability of its effective scheduled transmission.
In order to solve this problem, and allow network node to determine that the user equipment in its radio plot mitigates and send
The ability of the interference of the data-signal of other users equipment in cell, the number that network node generation analog network node is sent
It is believed that number interference reference signal, and by this way, user equipment suppressing the ability of these interference reference signals
To be the user equipment suppressing the other users equipment with same or analogous characteristic in data transfer to cell
Interference signal ability instruction.
This uses same or analogous frequency and time resource and same or analogous precoding in such as network node
Can be with particularly useful in the case of the superposed transmission sent to two user equipmenies.Near the customer equipment identification of network node
Transmission and the ability that is suppressed to other users equipment will influence whether it can be successfully received the data transfer of itself.
Fig. 1 illustrates such case.In Fig. 1, the network node of eNB (enode b) form is to two user equipmenies
UE1 and UE2 sends data.Superposed transmission with similar fast fading channel condition to UE1 and UE2, such as by similar or
Identical pre-coding matrix carries out precoding so that these UE will suffer from disturbing between serious UE.Especially, if UE2 is in
At cell edge and larger transmit power is distributed, UE1 seriously will be influenceed by UE2.If UE1 has advanced reception
Device, then it can eliminate the interference from UE2 at least in part, and remain able to successfully solve the PDSCH data of their own
Code.However, UE specifically disturbs elimination ability to be not specified by a standard, and generally not known to network.By this way,
In general, network node not can determine that whether UE1 can suppress the interference from its transmission to UE2, therefore will be unable to really
Whether fixed superposition by this way succeeds.Embodiments of the invention solve this point, and allow network node to understand and use
Family equipment suppressing the ability of interference of the data transfer to other users equipment.
Fig. 2 shows the flow chart of the step in the method for schematically showing and being performed according to embodiment.
Initially, determine whether there is Advanced receivers more than a certain proportion of UE in cell.In this respect, network node from
The ability of intra-cell users equipment is understood in the transmission that these user equipmenies receive.User equipment with Advanced receivers can be with
At least some interference caused by the data transfer to other users equipment can be suppressed, and therefore, only in cell
In the case of these a number of user equipmenies being inside present, it is worth the interference rejection capability for determining user equipment.In cell
In the case of without many such user equipmenies, the expense for sending interference reference signal is probably unworthy.
Therefore, if it is determined that in the cell in the absence of these Advanced receivers UE of predetermined ratio, then no insertion its
In interference reference signal in the case of, cell reference signals are sent, and if it is determined that existing in cell a number of advanced
Receiver UE, then reference signal is with the interference reference signal being embedded.
User equipment in cell will receive reference signal, and determine the quality of channel, concurrent channels quality indicator.
Network node receives CQI, and in the case where have sent embedded interference reference signal, it is determined that
Whether the CQI indicates the good suppression to interference signal.If CQI indicates good really
Suppress, then this represents that the user equipment may be used as user equipment centering and be disturbed user equipment for superposed transmission.Therefore,
Network node can be user equipment as this role selecting, and by itself and other users device pairing, and use identical
Pre-coding matrix, time and frequency resource send data to two user equipmenies, and dependent on the use near network node
Family equipment, to suppress to be pointed to the data transfer further from the user equipment of network node.
Fig. 3 shows the step in the method performed at user equipment according to one embodiment.User equipment is from net
Network node is received the time for sending channel disturbance reference signal and the instruction of frequency resource.In this respect, instruction can be specific
Ground identified time and frequency resource, or can indicate to be transmitted in the given time and be embedded in specific reference signals.
In the case of the interference reference signal for not having insertion within a period of time, reference signal can be sent, and in time subset
In the case of in the presence of embedded interference reference signal, reference signal can be sent.
Under any circumstance, as the time indicated by user equipment monitors and frequency resource, and user equipment determination is
It is no to detect interference reference signal.In this respect, the hypothesis data letter that interference reference signal analog network node may be sent
Number, and the therefore time indicated by user equipment monitors and frequency resource, to check whether it can be with data detection signal.Such as
Fruit can be can then suppress the data-signal, and determine channel quality after the interference suppression.If cannot data detection signal,
Channel quality will be then determined, but suppresses interference reference signal due to no, the channel quality detected (is probably BLER low
In the instruction of some value, or can be the intensity that reference signal is disturbed) it can reduce.Therefore, identified channel quality will
The interference whether repressed instruction of reference signal is provided.CQI is output to network node, and network node
It can suppress to disturb the ability of reference signal (to reflect it and be suppressed to other users equipment from this determination user equipment
The ability of data-signal).
In current system, channel quality indicator CQI can be with 10% BLER based on PDSCH transport block sizes and UE
The MCS (Modulation and Coding Scheme) decoded.By measuring reference signals (for example, CRS or CSI-RS), UE will be based on specific false
If BLER export CQI and feedback CQI with 10%.These are assumed (for example, maximizing letter using pre-coding matrix/precoder
Road capacity) it is considered as a part for specification, and observed by all UE.
The CQI of current report does not account for disturbing elimination/suppression, and therefore uses existing CQI processes, and report is " sad
The CQI (causing eNB to dispatch the TBS smaller than required TBS (transport block size)) of sight ", so as to make full use of by Rel
These advantages that 12NAICS or the superposed transmissions of Rel 13 provide.In Rel 13, RAN1, which will be studied, can be classified as MU-
MIMO (multiuser MIMO) worst practice and the overlapping transmission scheme for depending critically upon UE interference elimination abilities.Superposed transmission
It will make that there is for example (being meaned by multiple UE of phase Sihe identical pre-coding matrix precoding for similar fast fading channel condition
Those UE to will suffer from disturbing between serious UE) pairing.For example, because UE2 is at cell edge and is assigned with big biography
Defeated power, so in Fig. 1, UE1 will suffer from having a strong impact on for UE2.If some auxiliary informations can be supplied to UE1 and go back
The PDSCH data of their own can be successfully decoded, then the UE I with Advanced receivers can partly eliminate dry from UE2
Disturb.However, UE specifically disturb elimination ability be not as defined in standard, and generally not known to network.
As described above, existing cqi definition is realized depending on UE, and do not consider that interference eliminates.Although outside link adaptation
Portion's loop can ultimately result in eNB scheduling " correct " TBS, but the process is very slow and requires the disturbed condition during adaptation
Keep constant.
For superposed transmission scheme, it would be highly desirable to which appropriate CSI feedback mechanism, otherwise, eNB schedulers may have can
The very excessive risk of the serious multiple UE pairings interfering with each other and reducing overall network capacity of energy.
The basic thought of embodiment is to provide to have some noisy reference signals to UE when UE carries out CSI measurements.This
The interference reference signal of sample is considered that UE should mitigate and disturbs the hypothesis for indicating its interference mitigation ability.These
Reference signal can be similar to existing RS (reference signal) sequence, but embedded in CSI-RS, CRS or CSI-IM.Match somebody with somebody in advance
Put interference reference signal no less important so that UE and eNB understand each other (for example, interference reference signal when be/at what
Whether place and CSI report have any concrete meaning of interference elimination, when/how report returning result etc.).
Because UE will perform some eliminations of the interference in the RS (reference signal), so from the obtained synthesis of the RS
CQI will consider the receiver efficiency of UE in interference elimination.If it should be appreciated that MU-MIMO will to be used for (than what is used on RS
MU-MIMO is higher) UE pairings (for example, being matched as shown in Figure 1 to UE1 and UE2) when, eNB determines to use interference source
MCS (modulation and encoding scheme), then can reduce the efficiency that UE eliminates the interference.Therefore, the interference in RS will be used as UE can be with
With the efficiency reflected in the CQI that is reported come the upper limit that eliminates.
In order to reduce UE complexities, indicate that some high levels related to the RS disturbed comprising (insertion) configure to UE.
In one embodiment, provided to interference reference signal and be embedded in reference signaling RE (resource element) (for example, CRS
Or CSI-RS).Existing CQI measurements for channel measurement depend on reference signal.Therefore, before channel measurement is carried out, the phase
UE is hoped to remove interference reference signal.It is normal that the remainder (for example, due to quantization error) of reference signal is considered UE
A part for the noise/interference measurement of progress.How to capture such residual interference by be UE problem of implementation.It is if traditional
UE reuses the RS with embedded interference reference signal and is used for CSI report, then there may be some problems.Therefore, when
Between interference reference signal is sent in subset is probably favourable so that within a period of time, do not interfering with the feelings of reference signal
Under condition, signal is sent.
In another embodiment, provided to interference reference signal and be embedded in CSI-IM RE.In TM10, it is contemplated that UE will make
Channel measurement is carried out with CSI-RS, and interferometry is carried out using CSI-IM.Therefore, in this case, UE can disappear first
It is considered as noise and interference except the interference reference signal from CSI-IM RE, and by CSI-IM remainder.UE should try one's best will
CSI-IM RE signal intensity minimizes.In CSI-IM RE, the suppressible signal intensities of UE are higher, what UE can be experienced
Disturb smaller, and to eliminate ability stronger for the interference that has of UE.
In another embodiment, disturb reference signal can be with CRS the or CSI-RS RE of shared service cell, but disturb
Reference signal can use the different CRS or CSI-RS sequences scrambled by different virtual subdistrict ID.
In another embodiment, reference signal is disturbed to carry out non-precoding by specific pre-coding matrix or prelist
Code.Because this interference reference signal is precoding, so according to influence of the Wave beam forming to particular UE, reference signal is disturbed
Can be weak or strong.Therefore, the interference reference signal of precoding will cause UE specifically to disturb elimination.
In another embodiment, (it will be carried out further the PDSCH transmission that interference reference signal can assume that with standard
Design and explanation).As long as notifying time and the frequency resource of its transmission of UE, the PDSCH transmission design of various hypothesis is extensive
's.
In another embodiment, interference reference signal can contemplate existing reference signal (for example, CRS or CSI-RS RE)
Benchmark (for example, odB, +/- 1dB) as power setting.Therefore, nominal reference signal can be indicated to UE and with insertion
Disturb the power ratio between the new reference signal of reference signal so that network is appreciated that to eliminate how many interference and such as
Where UE and interference UE between distribution power is disturbed.
In another embodiment, the example of interference reference signal can be indicated to UE so that what UE can be appropriate in export
Know when UE eliminates interference reference signal while CQI.According to the sending method of interference reference signal, multiple design choosings be present
Select：
One in 5 (or multiple) CSI-RS or CRS or CSI-IM signallings so that interference reference signal will not go out
In each example of present CSI-RS/CRS transmission, to save UE power.
In embodiment, high-level signaling indicates when to UE and where will send and disturb reference signal.
In another embodiment, high level can be passed through by disturbing the configuration (for example, power, sequence, modulation etc.) of reference signal
Signaling is configured.Such configuration is readily applicable to receiver types, for example, can be provided to CWIC receivers more
Details, because CWIC receivers should eliminate more interference, or some receiver types be able to can enter than other receivers
The more blind decodings of row.Some receivers can for example eliminate higher modulation, and therefore disturb to include and adjusted with 64QAM
The sequence of system.
In another embodiment, it can be provided in CRS or CSI-RS or CSI-IM RE and be embedded in more than one interference
Reference signal.However, this will increase the UE complexities for exporting CQI after cancellation.
In another embodiment, if UE is configured with interference reference signal, it assume that new report mechanism.At this
In the case of kind, it can be reported using aperiodicity to trigger UE, to utilize this increasing of next example progress for disturbing reference signal
Strong CQI, and hereafter report result to eNB.
UE will have the CSI information for assuming that interference eliminates based on interference reference signal to measure and report.
Being provided with the limited UE complexities of pre-configured interference reference signal allows eNB to obtain more reliable UE and disappear
Removing solid capacity is reported.
It will be readily appreciated by those skilled in the art that the various above methods can be performed by the computer of programming
Step.Here, some embodiments, which also aim to, covers program storage device (for example, digital data storage medium), and program storage is set
Standby is machine or computer-readable and to instruction machine can perform or computer executable program encodes, wherein
Some or all of the step of instruction performs above method step.Program storage device can be such as stored digital
Magnetic storage medium, hard disk drive or the optical readable digital data storage medium of device, such as Disk and tape.Embodiment also purport
The computer of the step of the above method is programmed to execute in covering.
The hardware of software can be performed by using specialized hardware and together with appropriate software to provide accompanying drawing
Shown in various elements (including any functional block labeled as " processor " or " logic ") function.There is provided when by processor
When, can be by single application specific processor, single shared processor or multiple individually processors (some of them can be shared)
To provide function.In addition, term " processor " or " controller " or " logic " clearly using being not necessarily to be construed as being directed exclusively to
The hardware of software is able to carry out, and can implicitly include but be not limited to digital signal processor (DSP) hardware, network processes
Device, application specific integrated circuit (ASIC), field programmable gate array (FPGA), the read-only storage (ROM) for storing software, with
Machine access memory (RAM) and nonvolatile memory.Other conventional and/or customization hardware can also be included.Similarly, scheme
Shown in any switch be only conceptual.Their function can by the operation of programmed logic, pass through special logic, logical
Cross programme-control and the interaction of special logic, even manually perform, implementor can more specifically understand from the context
Particular technology.
It will be appreciated by those skilled in the art that this paper any block diagram represents to embody the exemplary circuit of the principle of the present invention
Conceptual view.Similarly, it will be appreciated that no matter whether computer or processor are explicitly shown, any flow table, flow
The expressions such as figure, state transition graph, false code can substantially represent and by such computer in computer-readable medium
Or the various processes of computing device.
Specification and drawings illustrate only the principle of the present invention.It will thus be appreciated that those skilled in the art can
Although design principle being not explicitly described or shown herein, embodying the present invention and be included in its spirit and scope
Interior various arrangements.In addition, all examples as described herein are directed primarily to be only used for teaching purpose, to help reader to understand this hair
Bright principle and the concept contributed by inventor's (one or more) for promotion this area, and it is interpreted do not had by these
Body narration example and condition and limit.In addition, record herein all statements of the principle, aspect and embodiment of the present invention with
And its specific example is intended to its equivalent.
Claims (15)
- A kind of 1. user equipment mitigating in performed at network node, radio plot that determine the network node Come the method for the freely ability of the interference for the data-signal that the network node is sent to other users equipment, methods described bag Include：Send at least one channel reference signal；Send interference reference signal, the data-signal that the interference reference signal simulation is sent by the network node；AndFeedback signal is received from user equipment, the feedback signal indicates being referred to suppress the interference for the user equipment The ability of signal.
- 2. the method according to claim 11, including further step：Indicate that interference reference signal will be by user equipment Send.
- 3. according to the method for claim 2, wherein the step indicated includes providing the instruction of time and frequency resource, The interference reference signal will be sent in the time and frequency resource.
- 4. according to the method described in any one preceding claims, wherein the interference reference signal use and the network node It is configured as the data-signal identical precoding of transmission and is pre-coded.
- 5. according to the method described in any one preceding claims, wherein at least one channel reference signal includes described do Disturb reference signal.
- 6. according to the method described in any one preceding claims, including send higher level signal, the higher level signal to Family equipment instruction interference reference signal will be sent.
- 7. according to the method for claim 6, including further sent in the higher level signal in following item at least One：The indicating of power, the interference reference signal and at least one channel reference signal of the interference reference signal Power ratio, scramble sequence, customer equipment identification, precoding and modulation instruction.
- 8. according to the method described in any one preceding claims, including multiple interference reference signals are sent, each interference reference Signal have in following item at least one of in different item：Power, scramble sequence, precoding, customer equipment identification and modulation Instruction.
- 9. according to the method described in any one preceding claims, wherein the feedback signal includes one in following item：Letter Road quality indicator and interference level.
- 10. according to the method described in any one preceding claims, including：Indicate that the user sets in response to the feedback signal It is standby effectively to suppress the interference signal, using identical time, frequency and precoding resource, with superposed transmission to described User equipment sends data and sends data to another user equipment.
- 11. according to the method for claim 10, wherein to the user equipment and the hair of another user equipment The power sent is chosen according to the feedback from the user equipment.
- 12. a kind of network node for the radio covering for being used to provide support for the user equipment in radio plot, described Network node includes：Transmitter, it is operable to send at least one channel reference signal and operable to send interference reference signal, it is described The data-signal that interference reference signal simulation is sent by the network node；AndReceiver, it is operable to receive feedback signal from user equipment, the feedback signal indicate the user equipment to Suppress the ability of the interference reference signal.
- 13. a kind of method performed at user equipment, including：The network node is received from network node, and analog data signal is sent on predefined time and frequency resource Disturb the instruction of reference signal；The time and the frequency resource of instruction are monitored, and suppress to send within the time and frequency resource has data letter Number feature signal；When the interference reference signal is suppressed, the residue signal of reception in the time and frequency resource is sent in The instruction of intensity.
- 14. a kind of user equipment, including：Receiver, it is operable to be sent with receiving the network node from network node on predefined time and frequency resource The instruction of the interference reference signal of analog data signal；Observation circuit, it is operable with the time of monitoring instruction and frequency resource；AndSuppression circuit, the letter of the operable feature with data-signal sent with suppression within the time and frequency resource Number；Transmitter, it is operable with it is described interference reference signal it is suppressed when, be sent in the time and frequency resource The instruction of the intensity of the residue signal of reception.
- 15. a kind of computer program, the computer program is operable to control the computer to hold when being performed by computer The step of method of the row according to any one of claim 1 to 11 and claim 13.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2015/076207 WO2016161610A1 (en) | 2015-04-09 | 2015-04-09 | Determination of a user equipment's ability to suppress interference |
Publications (2)
| Publication Number | Publication Date |
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| CN107534872A true CN107534872A (en) | 2018-01-02 |
| CN107534872B CN107534872B (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201580078683.5A Active CN107534872B (en) | 2015-04-09 | 2015-04-09 | Determination of capability of user equipment to suppress interference |
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| Country | Link |
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| CN (1) | CN107534872B (en) |
| WO (1) | WO2016161610A1 (en) |
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| WO2024031421A1 (en) * | 2022-08-10 | 2024-02-15 | Apple Inc. | Apparatus, method for user equipment, user equipment and method for network element |
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Also Published As
| Publication number | Publication date |
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| WO2016161610A1 (en) | 2016-10-13 |
| CN107534872B (en) | 2021-03-19 |
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