CN104639476B - Suppress the method and upcoming base station of TD LTE interference at crossed slot - Google Patents
Suppress the method and upcoming base station of TD LTE interference at crossed slot Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of method and upcoming base station of suppression TD LTE interference at crossed slot.Present invention method includes：Upcoming base station obtains uplink reference signals from user equipment and the local uplink reference signals of user equipment to estimate the channel information of the uplink channel information of uplink reference signals and upstream data. signals；The downlink reference signal of the downlink reference signal from adjacent area at cross time-slot and adjacent area is obtained to estimate descending interference channel information that descending interference channel information and upstream data. signals that cross time-slot uplink reference signals are subject to are subject to；Upcoming base station calculates adjacent area uplink interference noise statisticses information according to resulting data, and the descending interference channel information and adjacent area uplink interference noise statisticses information that channel information, upstream data. signals always according to upstream data. signals are subject to calculate equalizing coefficient；Upcoming base station is handled the upward signal that upcoming base station receives using equalizing coefficient.The present invention can reduce interference at crossed slot.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of method of suppression TD-LTE interference at crossed slot and up
Base station.
Background technology
In TD-LTE system, uplink downlink is assigned on same frequency spectrum and takes the different periods respectively, this
Sample can be with the ratio of flexible allocation uplink and downlink resource, and then configures money according to the ratio of uplink service and downlink business
Source.
However, if the portfolio of two adjacent base stations is different, TD-LTE will be brought using different time slot proportion schemes
System is specific to be disturbed, and shows as interference and mobile station interference to mobile station of the base station to base station, this interference is referred to as
Interference at crossed slot.
Research shows that the interference in cross time-slot is very serious, and the serious interference especially between base station and base station influences
Communication quality, although undertake in the cell of descending task typically can undertake uplink service in cross time-slot with normal work
Cell can hardly normal work in cross time-slot.
The content of the invention
The embodiments of the invention provide a kind of method and upcoming base station of suppression TD-LTE interference at crossed slot, for reducing
Interference at crossed slot.
First aspect of the embodiment of the present invention provides a kind of method of suppression TD-LTE interference at crossed slot, including：
Upcoming base station obtains the uplink reference signals from user equipment and the up ginseng of user equipment local
Examine signal, and downlink reference signal from adjacent area and the descending reference letter of the adjacent area at cross time-slot
Number；
The upcoming base station is according to the local institute of the uplink reference signals from user equipment and the user equipment
State uplink reference signals and estimate the uplink channel information of the uplink reference signals and the channel information of upstream data. signals；
The upcoming base station is according to the downlink reference signal from adjacent area and the descending ginseng of the adjacent area
Examine descending interference channel information and the upstream data. signals that signal estimation is subject in uplink reference signals described in cross time-slot
The descending interference channel information being subject to；
The upcoming base station calculates adjacent area uplink interference noise statisticses information according to resulting data, on described
The descending interference channel information and the adjacent area that the channel information of row data-signal, the upstream data. signals are subject to are up dry
Disturb noise statisticses information and calculate equalizing coefficient；
The upcoming base station is handled the upward signal received by the upcoming base station using the equalizing coefficient.
With reference to the embodiment of the present invention in a first aspect, in the first implementation of the first aspect of the embodiment of the present invention,
The upcoming base station is according to the local up ginseng of the uplink reference signals from user equipment and the user equipment
Signal is examined to estimate also to include after the uplink channel information of the uplink reference signals and the channel information of upstream data. signals：
A most young waiter in a wineshop or an inn for upcoming base station uplink channel information of the uplink reference signals from user equipment according to
The estimate for multiplying estimate and the uplink channel information of the uplink reference signals from user equipment is calculated in cross time-slot
The difference of the front and rear Signal to Interference plus Noise Ratio of conversion；
The upcoming base station calculates adjacent area uplink interference noise statisticses information according to resulting data and specifically included：
Judge whether the upcoming base station is more than in the difference of the front and rear Signal to Interference plus Noise Ratio of cross time-slot conversion
Threshold value；
If so, then the upcoming base station is according to the least-squares estimation of the uplink channel information of the uplink reference signals
The descending interference channel that value, the estimate of the uplink channel information of the uplink reference signals and the uplink reference signals are subject to
The estimate of information calculates adjacent area uplink interference noise statisticses information；
If it is not, then the upcoming base station is according to the least-squares estimation value of the uplink channel information of the uplink reference signals
Adjacent area uplink interference noise statisticses information is calculated with the estimate of the uplink channel information of the uplink reference signals.
With reference to the first implementation of the first aspect of the embodiment of the present invention, the of the first aspect of the embodiment of the present invention
In two kinds of implementations, the downlink reference signal from adjacent area is the adjacent area with TM3, TM4 or TM6 MIMO mode
The downlink reference signal of transmission；
Methods described also includes：
The upcoming base station also obtains pre-coding matrix；
The descending interference channel that the pre-coding matrix and the uplink reference signals are also subject to by the upcoming base station is believed
Manner of breathing, which is multiplied by, calculates the equivalent descending interference channel information that the uplink reference signals are subject to；
The descending interference channel that the pre-coding matrix and the upstream data. signals are also subject to by the upcoming base station is believed
Manner of breathing, which is multiplied by, calculates the equivalent descending interference channel information that the upstream data. signals are subject to；
The upcoming base station is used on described when calculating adjacent area uplink interference noise statisticses information and equalizing coefficient respectively
The equivalent descending interference channel information that row reference signal is subject to substitutes the descending interference channel letter that the uplink reference signals are subject to
Breath, and the equivalent descending interference channel information being subject to using the upstream data. signals substitute the upstream data. signals by
Descending interference channel information.
With reference to the embodiment of the present invention in a first aspect, in the third implementation of the first aspect of the embodiment of the present invention,
When the downlink reference signal from adjacent area is the downlink reference signal that the adjacent area is sent with TM2 MIMO mode,
The downlink reference signal that the upcoming base station obtains the adjacent area specifically includes：
The upcoming base station obtains the Cell ID and port information of the adjacent area；
The upcoming base station generates the described descending of the adjacent area according to the Cell ID and port information of the adjacent area
Reference signal.
With reference to the embodiment of the present invention in a first aspect, in the 4th kind of implementation of the first aspect of the embodiment of the present invention,
The downlink reference signal that the upcoming base station obtains the adjacent area specifically includes：
The upcoming base station obtains the downlink information at cross time-slot；
The upcoming base station generates the downlink reference signal of the adjacent area according to the downlink information.
Second aspect of the embodiment of the present invention provides a kind of upcoming base station, including：
Acquiring unit, local for uplink reference signals of the acquisition from user equipment and the user equipment is described
Row reference signal, and downlink reference signal from adjacent area and the descending ginseng of the adjacent area at cross time-slot
Examine signal；
First computing unit, for local according to the uplink reference signals from user equipment and the user equipment
The uplink reference signals estimate the uplink channel information of the uplink reference signals and the channel letter of upstream data. signals
Breath；
Second computing unit, for according to the downlink reference signal from adjacent area and the adjacent area it is described under
Row reference signal estimates that the uplink reference signals are by descending interference channel information and the upstream data on cross time-slot
The descending interference channel information that signal is subject to；
3rd computing unit, for calculating adjacent area uplink interference noise statisticses information according to resulting data, always according to
The descending interference channel information and the adjacent area that the channel information of the upstream data. signals, the upstream data. signals are subject to
Uplink interference noise statisticses information calculates equalizing coefficient；
Processing unit, at using the equalizing coefficient to the upward signal received by the upcoming base station
Reason.
With reference to the second aspect of the embodiment of the present invention, in the first implementation of the second aspect of the embodiment of the present invention,
The upcoming base station also includes：
4th computing unit, the uplink channel information for the uplink reference signals from user equipment according to is most
A young waiter in a wineshop or an inn multiplies estimate and the estimate calculating of the uplink channel information of the uplink reference signals from user equipment is intersecting
The difference of the front and rear Signal to Interference plus Noise Ratio of time slot conversion；
3rd computing unit is specifically used for when the upcoming base station is in the front and rear signal of cross time-slot conversion and interference
Plus noise than difference be more than threshold value when, according to the least-squares estimation of the uplink channel information of the uplink reference signals
The descending channel information of value, the estimate of the uplink channel information of the uplink reference signals and the uplink reference signals is estimated
Evaluation calculates adjacent area uplink interference noise statisticses information；
When the upcoming base station is less than or equal in advance in the difference of the front and rear Signal to Interference plus Noise Ratio of cross time-slot conversion
During setting value, according to the least-squares estimation value of the uplink channel information of the uplink reference signals and the uplink reference signals
Uplink channel information estimate calculate adjacent area uplink interference noise statisticses information.
With reference to the first implementation of the second aspect of the embodiment of the present invention, the of the second aspect of the embodiment of the present invention
In two kinds of implementations, when the downlink reference signal from adjacent area be the adjacent area with TM3, TM4 or TM6 MIMO moulds
During the downlink reference signal that formula is sent, the acquiring unit is additionally operable to obtain pre-coding matrix；
Second computing unit is additionally operable to the pre-coding matrix and the uplink reference signals being subject to descending dry
Disturb channel information to be multiplied to calculate the equivalent descending interference channel information that the uplink reference signals are subject to, also by the precoding
The descending interference channel information that matrix and the upstream data. signals are subject to is multiplied to calculate what the upstream data. signals were subject to
Equivalent descending interference channel information；
3rd computing unit uses institute when calculating adjacent area uplink interference noise statisticses information and equalizing coefficient respectively
State the equivalent descending interference channel information that uplink reference signals are subject to and substitute the descending interference letter that the uplink reference signals are subject to
Road information, and the equivalent descending interference channel information being subject to using the upstream data. signals substitute the upstream data. signals
The descending interference channel information being subject to.
With reference to the second aspect of the embodiment of the present invention, in the third implementation of the second aspect of the embodiment of the present invention,
When the downlink reference signal from adjacent area is the downlink reference signal that the adjacent area is sent with TM2 MIMO mode,
The acquiring unit is additionally operable to obtain the Cell ID and port information of the adjacent area, according to the Cell of the adjacent area
ID and port information generate the downlink reference signal of the adjacent area.
With reference to the second aspect of the embodiment of the present invention, in the 4th kind of implementation of the second aspect of the embodiment of the present invention,
The acquiring unit is additionally operable to obtain the downlink information at cross time-slot, and the adjacent area is generated according to the downlink information
The downlink reference signal.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
In the embodiment of the present invention, by calculating adjacent area uplink interference noise statisticses information, and according to the adjacent area uplink interference
Descending interference channel information that noise statisticses information, the channel information of upstream data. signals and upstream data. signals are subject to calculates
Equalizing coefficient, accurate equalizing coefficient can be so obtained, and then upcoming base station can be received using the equalizing coefficient
To upward signal handled, to reach more than the MMSE-IRC equalization performances of conventional MMSE-IRC approximate ideal.
Brief description of the drawings
Fig. 1 is the flow chart of one embodiment of the method for the suppression TD-LTE interference at crossed slot of the present invention；
Fig. 2 is the flow chart of another embodiment of the method for the suppression TD-LTE interference at crossed slot of the present invention；
Fig. 3 is the structural representation of one embodiment of the upcoming base station of the present invention.
Embodiment
The embodiments of the invention provide a kind of method and upcoming base station of suppression TD-LTE interference at crossed slot, for reducing
Interference at crossed slot.
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, it should all belong to the model that the present invention protects
Enclose.
Term " comprising " and " having " in description and claims of this specification and above-mentioned accompanying drawing and they
Any deformation, it is intended that cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, being
System, product or equipment are not necessarily limited to those steps or the unit clearly listed, but may include not list clearly or
For the intrinsic other steps of these processes, method, system, product or equipment or unit.
Clear to describe, channel information H herein refers to sending fading coefficients of the signal after propagation, is one
Individual Rx*TxThe matrix of dimension, wherein RxIt is reception antenna number, TxIt is transmission antenna number.
The method of the suppression TD-LTE interference at crossed slot of the present invention is described in detail below.
Referring to Fig. 1, suppressing the method for TD-LTE interference at crossed slot in one embodiment of the present of invention includes：
101st, upcoming base station obtains the uplink reference signals from UE and the uplink reference signals of UE locals.
UE sends the uplink reference signals of local to upcoming base station, the meeting during transmission due to uplink reference signals
Certain decline is undergone, therefore the uplink reference signals received by upcoming base station and the uplink reference signals at UE locals are simultaneously
It is different.For convenience of description, the uplink reference signals received by the upcoming base station are referred to as the uplink reference signals from UE.
Specifically, in the present embodiment, uplink reference signals are demodulated reference signal (English:Demodulation Reference
Signal, abbreviation：DMRS).Certainly, citing is above are only, is not restricted.
102nd, upcoming base station is according to the local uplink reference signals of the uplink reference signals from UE and the UE
Calculate the estimate of the uplink channel information of the uplink reference signals and the estimate of the channel information of upstream data. signals.
Specifically, by taking DMRS as an example.Upcoming base station calculates the least square (English of the uplink channel information of the DMRS first
Text：Least square, abbreviation：LS) estimate HLS,ul.Specifically,Wherein Yul,RSIt is to come from UE
DMRS, SulIt is the local DMRS of UE,It is SulConjugation.
Obtain the LS estimates H of DMRS uplink channel informationLS,ulAfterwards, upcoming base station is to HLS,ulCarry out noise reduction filtering just
The estimate of the uplink channel information of the DMRS can be obtainedSpecifically,Wherein QulIt is
Up noise reduction filtering coefficient.
Obtain the estimate of DMRS uplink channel informationAfterwards, upcoming base station can utilize linear interpolation or wiener
The methods of filtering according toCalculate the estimate of the channel information of upstream data. signalsThe specific computational methods are
Known technology, it will not be described here.
103rd, upcoming base station obtains the downlink reference signal from adjacent area and the downlink reference signal of the adjacent area.
Adjacent area in the present embodiment is the cell of interference at crossed slot occur with upcoming base station.Adjacent area by local descending ginseng
Signal is examined to send to upcoming base station, because downlink reference signal can undergo certain decline during transmission, therefore it is up
Downlink reference signal received by base station and the downlink reference signal at adjacent area are simultaneously different.For convenience of description, will
Downlink reference signal received by the upcoming base station is referred to as the downlink reference signal from adjacent area.Specifically, in the present embodiment,
Downlink reference signal is cell own reference signal (English：Cell-specific reference signal, abbreviation：CRS).
Adjacent area sends downlink reference signal with TM2 MIMO mode.Certainly, citing is above are only, is not restricted.
The downlink reference signal that upcoming base station obtains adjacent area has a variety of methods.For concrete example, upcoming base station can
Cell ID (cell identification, the contracting of the adjacent area are obtained by the information interactive interface X2 mouths between base station
Write:Cell ID) and port (English：Port) information, adjacent area is generated further according to the Cell ID and port information of the adjacent area
Local CRS.
104th, upcoming base station is believed according to the downlink reference signal from adjacent area and the local descending reference of the adjacent area
Number calculate the descending interference channel information and upstream data. signals that are subject in cross time-slot uplink reference signals be subject to it is descending dry
Disturb channel information.
Specifically by taking DMRS and CRS as an example.Upcoming base station calculates the LS estimates H of CRS descending channel information firstLS,dl。
Specifically,Wherein Ydl,RSIt is the CRS from adjacent area, SdlIt is the CRS of adjacent area,It is adjacent area
Local CRS conjugation.
Obtain HLS,dlAfterwards, upcoming base station is to HLS,dlThe CRS estimation of descending channel information can be obtained by carrying out noise reduction filtering
ValueSpecifically,Wherein QdlIt is descending noise reduction filtering coefficient.
ObtainAfterwards, upcoming base station can utilize the methods of linear interpolation or Wiener filtering according toCalculate
In the descending interference channel information that the up DMRS of cross time-slot is subject toThe descending interference letter being subject to upstream data. signals
The estimate of road informationThe specific computational methods are known technology, be will not be described here.
105th, upcoming base station calculates the front and rear SINR differences of cross time-slot conversion.
For concrete example, H is obtainedLS,ulWithAfterwards, upcoming base station it is measurable go out each Transmission Time Interval (English
Text：Transmission time interval, abbreviation：TTI) each resource block (English：Resource block, abbreviation：
RB Signal to Interference plus Noise Ratio (the English on)：Signal to interference plus noise ratio, abbreviation：
SINR) it is：
Wherein,It is HLS,ul2 norms.
After calculating SINR of each RB on every TTI, two of the RB respectively before and after cross time-slot conversion can be found out
Individual SINR, and two SINR are subtracted each other, to obtain the front and rear SINR differences of cross time-slot conversion.
106th, judge whether the SINR differences are more than threshold value；If so, step 107 is then performed, if it is not, then performing step
108。
The threshold value is that upcoming base station is pre-set.Specifically, can be rule of thumb or real in the network planning
Survey result and the threshold value is preset in upcoming base station.The threshold value can be according to environment and business during network operation
Change and be modified.
107th, upcoming base station according to the LS estimates of the uplink channel information of uplink reference signals, uplink reference signals it is upper
It is up dry that the estimate for the descending interference channel information that the estimate and uplink reference signals of row channel information are subject to calculates adjacent area
Disturb noise statisticses information.
In the present embodiment, adjacent area uplink interference noise statisticses information can include adjacent area UE interference, low at cross time-slot
In the interference of the descending base station of interference noise thresholding, white noise etc..
The method of calculating adjacent area uplink interference noise statisticses information has a variety of.For example, upcoming base station can be by carrying in K son
It is averaging on ripple and obtains adjacent area uplink interference noise statisticses information Ruu,ul：
,
Wherein, k is subcarrier number.In practice, K value is generally RB length, i.e., 12.Certainly, in practice,
Ruu,ulIt can also be obtained by other formula, this is not restricted.
108th, upcoming base station is according to the LS estimates of the uplink channel information of uplink reference signals and uplink reference signals
The estimate of uplink channel information calculates adjacent area uplink interference noise statisticses information Ruu,ul。
In the present embodiment, adjacent area uplink interference noise statisticses information can include adjacent area UE interference, low at cross time-slot
In the interference of the descending base station of interference noise thresholding, white noise etc..
The method of calculating adjacent area uplink interference noise statisticses information has a variety of.For example, upcoming base station can be by carrying in K son
It is averaging on ripple and obtains Ruu,ul：
Wherein, k carries for son
Ripple is numbered.In practice, K value is generally RB length, i.e., 12.Certainly, in practice, Ruu,ulIt can also lead to
Cross other formula to obtain, this is not restricted.
109th, the descending interference channel that upcoming base station is subject to according to the channel informations of upstream data. signals, upstream data. signals
Information and adjacent area uplink interference noise statisticses information calculate equalizing coefficient, also using equalizing coefficient to received by upcoming base station
Upward signal handled.
Upcoming base station first calculates equalizing coefficientSpecifically：
Wherein,It isConjugate transposition,It isConjugate transposition.
Upcoming base station is further according to equalizing coefficientWith the uplink reference signals Y from UEulEstimate the up transmitting data of UESpecifically,
In the present embodiment, by calculating adjacent area uplink interference noise statisticses information, and according to the adjacent area uplink interference noise
Descending interference channel information that statistical information, the channel information of upstream data. signals and upstream data. signals are subject to calculates equilibrium
Coefficient, can so obtain accurate equalizing coefficient, and then upcoming base station can be received using the equalizing coefficient
Upward signal is handled, to reach more than the MMSE-IRC equalization performances of conventional MMSE-IRC approximate ideal；And due to
Descending base station at cross time-slot sends signal with TM2 MIMO mode, thus can compatible existing protocol, do not increase extra
Signaling consumption.
In the present embodiment, before adjacent area uplink interference noise statisticses information is calculated, when upcoming base station first determines whether to intersect
Whether the front and rear SINR differences of gap conversion are more than threshold value, divide in more than threshold value and less than or equal to two kinds of situations of threshold value
Method that Cai Yong be not different is calculated adjacent area uplink interference noise statisticses information, so that the adjacent area uplink interference that must be calculated
Noise statisticses information is more accurate.Certainly, in practice, upcoming base station can not also judge that cross time-slot conversion is front and rear
Whether SINR differences are more than threshold value, but it is same adjacent area uplink interference noise statisticses information is calculated using a kind of method,
This is not restricted.
The MIMO mode of descending base station at cross time-slot is limited in above example.In practice, also may be used
Not limit the MIMO mode of descending base station at cross time-slot, referring to Fig. 2, when suppressing TD-LTE intersections in the present invention
Another embodiment of the method for gap interference includes：
201st, upcoming base station obtains the uplink reference signals from UE and the uplink reference signals of UE locals.
Describe the explanation of step 101 in embodiment shown in Figure 1 in detail.
202nd, upcoming base station is according to the local uplink reference signals of the uplink reference signals from UE and the UE
Calculate the estimate of the uplink channel information of the uplink reference signals and the estimate of the channel information of upstream data. signals.
Describe the explanation of step 102 in embodiment shown in Figure 1 in detail.
203rd, upcoming base station obtains the downlink reference signal from adjacent area and the downlink reference signal of the adjacent area.
In the present embodiment, upcoming base station can pass through S1 mouths or the downlink reference signal of X2 mouth direct interactions adjacent area
And precoding codebook.Or upcoming base station can also first obtain the downlink information at cross time-slot, further according to the descending letter
The downlink reference signal and precoding codebook of breath generation adjacent area.
Downlink information has a variety of.For example, the downlink information can include RB positional informations, the MIMO mode of descending base station,
Rank values, pre-coding matrix index (English：Precoding Matrix Index, abbreviation：PMI), DMRS sequence informations, CSI-
The information such as RS positional informations.It is noted that PMI needs to replace when the MIMO mode of descending base station is TM3, TM4, TM6 or TM9
For precoding codebook.When the MIMO mode of descending base station is TM7 or TM8, it is interim that downlink information can also include wireless network
Mark (English：Radio network tempory identity, abbreviation：RNTI), the information such as user equipment ID, port mouths.
If the MIMO mode of descending base station is TM2, TM3, TM4, TM6 or TM9, upcoming base station can utilize port information
Generate local CRS.Wherein, when the MIMO mode of descending base station is TM3, upcoming base station is also needed according to rank values, RB positions letter
Breath chooses circulation long time delay matrix and precoding codebook；When the MIMO mode of descending base station is TM4, TM6 or TM9, up base
Standing also needs to choose precoding codebook according to rank values and PMI value.
If the MIMO mode of descending base station is TM7 or TM8, upcoming base station can utilize CellID, RNTI, RB position
Put, the information such as Port mouths generates local DMRS.
After upcoming base station gets precoding codebook, pre-coding matrix can be therefrom got.
204th, upcoming base station is according to the downlink reference signal from adjacent area and the descending reference of the adjacent area
Signal of change is subject to descending in the descending interference channel information and upstream data. signals that cross time-slot uplink reference signals are subject to
Interference channel information.
In the present embodiment, if the MIMO mode of descending base station is TM2, the descending channel information of downlink reference signal is estimated
EvaluationThe estimate of the channel information for the descending interference channel information being subject to upstream data. signals at cross time-slotComputational methods it is consistent with step 106 in embodiment illustrated in fig. 1.
If the MIMO mode of descending base station is TM3, upcoming base station uses following computational methods.
Upcoming base station calculates the estimate H of CRS descending channel information first with the CRS of adjacent areaLS,dl.Specifically,Wherein, Ydl,RSIt is the CRS from adjacent area, SdlIt is the CRS of adjacent area,It is adjacent area
CRS conjugation.
Obtain the estimate H of CRS descending channel informationLS,dlAfterwards, upcoming base station is to HLS,dlCarrying out noise reduction filtering can obtain
To the estimate of CRS descending channel informationSpecifically,Wherein QdlIt is descending noise reduction
Filter factor.
Obtain the estimate of CRS descending channel informationAfterwards, upcoming base station can utilize linear interpolation or wiener
The methods of filtering according toCalculate the descending interference channel information being subject in the up DMRS of cross time-slotWith it is upper
The estimate for the descending interference channel information that row data-signal is subject to
Then upcoming base station willPre-coding matrix corresponding to being multiplied by obtains equivalent channel estimateOr
WillCirculation long time delay matrix obtains the estimate of equivalent channels information corresponding to being multiplied by
If the MIMO mode of descending base station is TM4 or TM6, upcoming base station is being calculated in the up DMRS of cross time-slot
The estimate for the descending interference channel information being subject toThe descending interference channel information being subject to upstream data. signals is estimated
EvaluationWhen, upcoming base station willPre-coding matrix corresponding to being multiplied by obtains the descending interference channel information that DMRS is subject to
Equivalent channel estimateOr willMultiply and obtained in corresponding pre-coding matrix under upstream data. signals are subject to
The equivalent channel estimate of row interference channel information
If the MIMO mode of descending base station is TM7, TM8 or TM9, upcoming base station uses the method in TM3 to calculate
To the descending interference channel information being subject in the up DMRS of cross time-slot estimateIt is to have contained precoding
The equivalent channel estimate of matrixThe descending interference channel information that the upstream data. signals being calculated are subject to is estimated
ValueIt is the equivalent channel estimate for having contained pre-coding matrix
205th, upcoming base station calculates the front and rear SINR differences of cross time-slot conversion.
Describe the explanation of step 105 in embodiment shown in Figure 1 in detail.
206th, judge whether the SINR differences are more than threshold value；If so, step 207 is then performed, if it is not, then performing step
208。
Describe the explanation of step 106 in embodiment shown in Figure 1 in detail.
207th, upcoming base station according to the LS estimates of the uplink channel information of uplink reference signals, uplink reference signals it is upper
The equivalent channel estimate for the descending interference channel information that the estimate and uplink reference signals of row channel information are subject to calculates adjacent
Area's uplink interference noise statisticses information.
In the present embodiment, adjacent area uplink interference noise statisticses information can include adjacent area UE interference, low at cross time-slot
In the interference of the descending base station of interference noise thresholding, white noise etc..
The method of calculating adjacent area uplink interference noise statisticses information has a variety of.For example, upcoming base station can be by carrying in K son
It is averaging on ripple and obtains adjacent area uplink interference noise statisticses information Ruu,ul：
,
Wherein, k is subcarrier number.In practice, K value is generally RB length, i.e., 12.Certainly, in practice,
Ruu,ulIt can also be obtained by other formula, this is not restricted.
208th, upcoming base station is according to the LS estimates of the uplink channel information of uplink reference signals and uplink reference signals
The estimate of uplink channel information calculates adjacent area uplink interference noise statisticses information.
In the present embodiment, adjacent area uplink interference noise statisticses information can include adjacent area UE interference, low at cross time-slot
In the interference of the descending base station of interference noise thresholding, white noise etc..
The method of calculating adjacent area uplink interference noise statisticses information has a variety of.For example, upcoming base station can be by carrying in K son
It is averaging on ripple and obtains adjacent area uplink interference noise statisticses information Ruu,ul：
Wherein, k carries for son
Ripple is numbered.In practice, K value is generally RB length, i.e., 12.Certainly, in practice, Ruu,ulIt can also lead to
Cross other formula to obtain, this is not restricted.
209th, the descending interference channel that upcoming base station is subject to according to the channel informations of upstream data. signals, upstream data. signals
Information and adjacent area uplink interference noise statisticses information calculate equalizing coefficient, also using equalizing coefficient to received by upcoming base station
Upward signal handled.
Upcoming base station first calculates equalizing coefficientSpecifically：
Upcoming base station is further according to equalizing coefficientWith the uplink reference signals Y from UEulEstimate the up transmitting data of UESpecifically,
In the present embodiment, upcoming base station obtains cross jamming by intercepting adjacent area downlink reference signal at cross time-slot
Transient channel information, so as to obtain the MMSE-IRC equalization performances of approximate ideal.
The method of the suppression TD-LTE interference at crossed slot in the embodiment of the present invention is described above, below to this
Upcoming base station in inventive embodiments is described, referring to Fig. 3, upcoming base station 300 includes in the embodiment of the present invention：
Acquiring unit 301, for obtaining the uplink reference signals from user equipment and the institute of user equipment local
State uplink reference signals, and downlink reference signal from adjacent area at the cross time-slot and the adjacent area it is described under
Row reference signal；
First computing unit 302, for according to the uplink reference signals from user equipment and the user equipment
The local uplink reference signals estimate the uplink channel information of the uplink reference signals and the letter of upstream data. signals
Road information；
Second computing unit 303, for the institute according to the downlink reference signal from adjacent area and the adjacent area
State downlink reference signal estimation on cross time-slot the uplink reference signals by descending interference channel information and described up
The descending interference channel information that data-signal is subject to；
3rd computing unit 304, for calculating adjacent area uplink interference noise statisticses information according to resulting data, go back root
The descending interference channel information being subject to according to the channel information of the upstream data. signals, the upstream data. signals and the neighbour
Area's uplink interference noise statisticses information calculates equalizing coefficient；
Processing unit 305, for being carried out using the equalizing coefficient to the upward signal received by the upcoming base station
Processing.
In the present embodiment, by calculating adjacent area uplink interference noise statisticses information, and according to the adjacent area uplink interference noise
Descending interference channel information that statistical information, the channel information of upstream data. signals and upstream data. signals are subject to calculates equilibrium
Coefficient, accurate interference channel information can be so obtained, and then upcoming base station can be received using the equalizing coefficient
To upward signal handled, to reach more than the MMSE-IRC equalization performances of conventional MMSE-IRC approximate ideal；And
Because the descending base station at cross time-slot with TM2 MIMO mode sends signal, thus can compatible existing protocol, do not increase volume
Outer signaling consumption.
Preferably, the upcoming base station also includes：
4th computing unit (not shown), for the up channel according to the uplink reference signals from user equipment
The estimate meter of the least-squares estimation value of information and the uplink channel information of the uplink reference signals from user equipment
Calculate the difference in the front and rear Signal to Interference plus Noise Ratio of cross time-slot conversion；
3rd computing unit 304 when the upcoming base station specifically in the front and rear signal of cross time-slot conversion and doing
Disturb plus noise than difference be more than default value when, estimated according to the least square of the uplink channel information of the uplink reference signals
Evaluation, the estimate of uplink channel information of the uplink reference signals and the descending channel information of the uplink reference signals
Estimate calculates adjacent area uplink interference noise statisticses information；
When the upcoming base station is less than or equal in advance in the difference of the front and rear Signal to Interference plus Noise Ratio of cross time-slot conversion
During setting value, according to the least-squares estimation value of the uplink channel information of the uplink reference signals and the uplink reference signals
Uplink channel information estimate calculate adjacent area uplink interference noise statisticses information.
Preferably, when the downlink reference signal from adjacent area be the adjacent area with TM3, TM4 or TM6 MIMO moulds
During the downlink reference signal that formula is sent, the acquiring unit is additionally operable to obtain pre-coding matrix；
Second computing unit 303 is additionally operable to the pre-coding matrix and the uplink reference signals being subject to descending
Interference channel information is multiplied to calculate the equivalent descending interference channel information that the uplink reference signals are subject to, and is also prelisted described
Code matrix and the descending interference channel information that is subject to of the upstream data. signals be multiplied to calculate the upstream data. signals by
Equivalent descending interference channel information；
3rd computing unit 304 uses when calculating adjacent area uplink interference noise statisticses information and equalizing coefficient respectively
The equivalent descending interference channel information that the uplink reference signals are subject to substitutes the descending interference that the uplink reference signals are subject to
Channel information, and the equivalent descending interference channel information being subject to using the upstream data. signals substitute the upstream data letter
Number descending interference channel information being subject to.
Preferably, when the downlink reference signal from adjacent area is under the adjacent area is sent with TM2 MIMO mode
During row reference signal, the acquiring unit 301 is additionally operable to obtain the Cell ID and port information of the adjacent area, according to the neighbour
The Cell ID and port information in area generate the downlink reference signal of the adjacent area.
Preferably, the acquiring unit 301 is additionally operable to obtain the downlink information at cross time-slot, according to the downlink information
Generate the downlink reference signal of the adjacent area.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Division, only a kind of division of logic function, can there is other dividing mode, such as multiple units or component when actually realizing
Another system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or
The mutual coupling discussed or direct-coupling or communication connection can be the indirect couplings by some interfaces, device or unit
Close or communicate to connect, can be electrical, mechanical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to be contributed in other words to prior art or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are causing a computer
Equipment (can be personal computer, server, or network equipment etc.) performs the complete of each embodiment methods described of the present invention
Portion or part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
Described above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to before
Embodiment is stated the present invention is described in detail, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
- A kind of 1. method of suppression TD-LTE interference at crossed slot, it is characterised in that including：Upcoming base station obtains the uplink reference signals from user equipment and the up reference letter of user equipment local Number, and downlink reference signal from adjacent area and the downlink reference signal of the adjacent area at cross time-slot；The upcoming base station is according on local described of the uplink reference signals from user equipment and the user equipment Row reference signal estimates the uplink channel information of the uplink reference signals and the channel information of upstream data. signals, wherein, The up of uplink reference signals is obtained according to the uplink reference signals that the uplink reference signals of user equipment and user equipment are local The LS estimates of channel information, noise reduction filtering is carried out to the LS estimates to obtain the up channel of the uplink reference signals The estimate of information；The upcoming base station is believed according to the downlink reference signal from adjacent area and the descending reference of the adjacent area Number descending interference channel information that is subject in uplink reference signals described in cross time-slot of estimation and the upstream data. signals by Descending interference channel information, wherein, according to the downlink reference signal from adjacent area and the local downlink reference signal meter of adjacent area The LS estimates of the descending channel information of downlink reference signal are calculated, LS estimates progress noise reduction filtering are obtained described descending The estimate of the descending channel information of reference signal；The upcoming base station calculates adjacent area uplink interference noise statisticses information；The descending interference that the upcoming base station is subject to according to the channel informations of the upstream data. signals, the upstream data. signals Channel information and the adjacent area uplink interference noise statisticses information calculate equalizing coefficient；The upcoming base station is handled the upward signal received by the upcoming base station using the equalizing coefficient；The descending interference that the upcoming base station is subject to according to the channel informations of the upstream data. signals, the upstream data. signals Channel information and the adjacent area uplink interference noise statisticses information calculate equalizing coefficient, including：Wherein,It isConjugate transposition,It isConjugate transposition,For equalizing coefficient,For upstream data The estimate of the channel information of signal,It is the estimate for the descending interference channel information that upstream data. signals are subject to, Ruu,ul It is adjacent area uplink interference noise statisticses information.
- 2. the method for suppression TD-LTE interference at crossed slot according to claim 1, it is characterised in that the upcoming base station Estimate institute according to the uplink reference signals that the uplink reference signals from user equipment and the user equipment are local The channel information of the uplink channel information and upstream data. signals of stating uplink reference signals also includes afterwards：The upcoming base station is estimated according to the least square of the uplink channel information of the uplink reference signals from user equipment The estimate of the uplink channel information of evaluation and the uplink reference signals from user equipment calculates to be changed in cross time-slot The difference of front and rear Signal to Interference plus Noise Ratio；The upcoming base station calculates adjacent area uplink interference noise statisticses information according to resulting data and specifically included：Judge whether the upcoming base station is more than thresholding in the difference of the front and rear Signal to Interference plus Noise Ratio of cross time-slot conversion Value；If so, then least-squares estimation value of the upcoming base station according to the uplink channel information of the uplink reference signals, institute State the estimate of the uplink channel information of uplink reference signals and descending interference channel information that the uplink reference signals are subject to Estimate calculate adjacent area uplink interference noise statisticses information；If it is not, then least-squares estimation value and institute of the upcoming base station according to the uplink channel information of the uplink reference signals The estimate for stating the uplink channel information of uplink reference signals calculates adjacent area uplink interference noise statisticses information.
- 3. the method for suppression TD-LTE interference at crossed slot according to claim 2, it is characterised in that described to come from adjacent area The downlink reference signal that is sent for the adjacent area with TM3, TM4 or TM6 MIMO mode of downlink reference signal；Methods described also includes：The upcoming base station also obtains pre-coding matrix；The descending interference channel information phase that the pre-coding matrix and the uplink reference signals are also subject to by the upcoming base station It is multiplied by and calculates the equivalent descending interference channel information that the uplink reference signals are subject to；The descending interference channel information phase that the pre-coding matrix and the upstream data. signals are also subject to by the upcoming base station It is multiplied by and calculates the equivalent descending interference channel information that the upstream data. signals are subject to；The upcoming base station uses the up ginseng when calculating adjacent area uplink interference noise statisticses information and equalizing coefficient respectively Examine the equivalent descending interference channel information that signal is subject to and substitute the descending interference channel information that the uplink reference signals are subject to, with And under the equivalent descending interference channel information replacement upstream data. signals being subject to using the upstream data. signals are subject to Row interference channel information.
- 4. the method for suppression TD-LTE interference at crossed slot according to claim 1, it is characterised in that come from when described When the downlink reference signal of adjacent area is the downlink reference signal that the adjacent area is sent with TM2 MIMO mode,The downlink reference signal that the upcoming base station obtains the adjacent area specifically includes：The upcoming base station obtains the Cell ID and port information of the adjacent area；The upcoming base station generates the descending reference of the adjacent area according to the Cell ID and port information of the adjacent area Signal.
- 5. the method for suppression TD-LTE interference at crossed slot according to claim 1, it is characterised in thatThe downlink reference signal that the upcoming base station obtains the adjacent area specifically includes：The upcoming base station obtains the downlink information at cross time-slot；The upcoming base station generates the downlink reference signal of the adjacent area according to the downlink information.
- A kind of 6. upcoming base station, it is characterised in that including：Acquiring unit, for obtaining the uplink reference signals from user equipment and the up ginseng of user equipment local Examine signal, and downlink reference signal from adjacent area and the descending reference letter of the adjacent area at cross time-slot Number；First computing unit, for according to the local institute of the uplink reference signals from user equipment and the user equipment State uplink reference signals and estimate the uplink channel information of the uplink reference signals and the channel information of upstream data. signals, its In, obtain the upper of uplink reference signals according to the uplink reference signals that the uplink reference signals of user equipment and user equipment are local The LS estimates of row channel information, noise reduction filtering is carried out to the LS estimates to obtain the up letter of the uplink reference signals The estimate of road information；Second computing unit, for the descending ginseng according to the downlink reference signal from adjacent area and the adjacent area Examine signal and estimate that the uplink reference signals are by descending interference channel information and the upstream data. signals on cross time-slot The descending interference channel information being subject to, wherein, believed according to the downlink reference signal from adjacent area and the local descending reference of adjacent area Number calculate the LS estimates of the descending channel information of downlink reference signal, the LS estimates are carried out noise reduction filtering obtain it is described The estimate of the descending channel information of downlink reference signal；3rd computing unit, for calculating adjacent area uplink interference noise statisticses information according to resulting data, always according to described The descending interference channel information and the adjacent area that the channel information of upstream data. signals, the upstream data. signals are subject to are up Interference noise statistical information calculates equalizing coefficient；Processing unit, for being handled using the equalizing coefficient the upward signal received by the upcoming base station；Wherein, the descending interference channel being subject to according to the channel information of the upstream data. signals, the upstream data. signals is believed Breath and the adjacent area uplink interference noise statisticses information calculate equalizing coefficient, including：Wherein,It isConjugate transposition,It isConjugate transposition,For equalizing coefficient,For upstream data The estimate of the channel information of signal,It is the estimate for the descending interference channel information that upstream data. signals are subject to, Ruu,ul It is adjacent area uplink interference noise statisticses information.
- 7. upcoming base station according to claim 6, it is characterised in that the upcoming base station also includes：4th computing unit, the most young waiter in a wineshop or an inn for the uplink channel information according to the uplink reference signals from user equipment The estimate for multiplying estimate and the uplink channel information of the uplink reference signals from user equipment is calculated in cross time-slot The difference of the front and rear Signal to Interference plus Noise Ratio of conversion；3rd computing unit is specifically used for when the upcoming base station in the front and rear signal of cross time-slot conversion with disturbing plus making an uproar When the difference of acoustic ratio is more than threshold value, according to the least-squares estimation value of the uplink channel information of the uplink reference signals, institute State the estimate of the uplink channel information of uplink reference signals and the estimate of the descending channel information of the uplink reference signals Calculate adjacent area uplink interference noise statisticses information；When the upcoming base station is less than or equal to threshold value in the difference of the front and rear Signal to Interference plus Noise Ratio of cross time-slot conversion When, according to the up of the least-squares estimation value of the uplink channel information of the uplink reference signals and the uplink reference signals The estimate of channel information calculates adjacent area uplink interference noise statisticses information.
- 8. upcoming base station according to claim 7, it is characterised in that when the downlink reference signal from adjacent area is institute When stating the downlink reference signal that adjacent area is sent with TM3, TM4 or TM6 MIMO mode, the acquiring unit is additionally operable to obtain in advance Encoder matrix；The descending interference that second computing unit is additionally operable to the pre-coding matrix and the uplink reference signals being subject to is believed Road information is multiplied to calculate the equivalent descending interference channel information that the uplink reference signals are subject to, also by the pre-coding matrix The descending interference channel information being subject to the upstream data. signals be multiplied to calculate the upstream data. signals be subject to it is equivalent Descending interference channel information；3rd computing unit is used on described when calculating adjacent area uplink interference noise statisticses information and equalizing coefficient respectively The equivalent descending interference channel information that row reference signal is subject to substitutes the descending interference channel letter that the uplink reference signals are subject to Breath, and the equivalent descending interference channel information being subject to using the upstream data. signals substitute the upstream data. signals by Descending interference channel information.
- 9. upcoming base station according to claim 6, it is characterised in that when the downlink reference signal from adjacent area is institute When stating the downlink reference signal that adjacent area is sent with TM2 MIMO mode,The acquiring unit is additionally operable to obtain the Cell ID and port information of the adjacent area, according to the Cell ID of the adjacent area and Port information generates the downlink reference signal of the adjacent area.
- 10. upcoming base station according to claim 6, it is characterised in thatThe acquiring unit is additionally operable to obtain the downlink information at cross time-slot, and the adjacent area sheet is generated according to the downlink information The downlink reference signal on ground.
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| CN106941464B (en) * | 2016-01-04 | 2020-01-21 | 中国移动通信集团公司 | Interference elimination method, base station and user equipment |
| WO2017190272A1 (en) * | 2016-05-03 | 2017-11-09 | 华为技术有限公司 | Interference elimination method and base station |
| US11546191B2 (en) | 2018-06-28 | 2023-01-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for channel estimation |
| CN113852441B (en) * | 2020-06-28 | 2023-04-14 | 大唐移动通信设备有限公司 | Cross time slot interference processing method, base station, device and medium |
| CN112512077B (en) * | 2020-12-15 | 2023-08-11 | 中国联合网络通信集团有限公司 | Uplink rate evaluation method and device |
| CN115021858A (en) * | 2021-03-05 | 2022-09-06 | 海能达通信股份有限公司 | Interference suppression method and related device, base station and storage medium |
| CN115087014B (en) * | 2022-06-20 | 2024-04-12 | 中国联合网络通信集团有限公司 | Uplink signal detection method and device of flexible frame structure simulation system |
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| WO2013020458A1 (en) * | 2011-08-05 | 2013-02-14 | 电信科学技术研究院 | Transmission scheduling method and device |
| EP3113532A1 (en) * | 2014-02-28 | 2017-01-04 | China Academy of Telecommunications Technology | Base station frequency resource allocation method and network device |
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| CN102036295A (en) * | 2010-12-02 | 2011-04-27 | 大唐移动通信设备有限公司 | Method, system and equipment for determining uplink and downlink configuration |
| WO2013020458A1 (en) * | 2011-08-05 | 2013-02-14 | 电信科学技术研究院 | Transmission scheduling method and device |
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