CN106413005A - Method and device of coordinating cell edge user interference and base station - Google Patents
Method and device of coordinating cell edge user interference and base station Download PDFInfo
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- CN106413005A CN106413005A CN201510448254.4A CN201510448254A CN106413005A CN 106413005 A CN106413005 A CN 106413005A CN 201510448254 A CN201510448254 A CN 201510448254A CN 106413005 A CN106413005 A CN 106413005A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
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Abstract
The present invention discloses a method and device of coordinating cell edge user interference and a base station, wherein the method comprises the steps of receiving a reference signal receiving power (RSRP) list fed back by a cell edge user to determine an interference source having the strongest interference to the cell edge user; receiving a first precoding matrix indicator (PMI) value obtained by the channel evaluation of the cell edge user to the interference source; according to the first PMI value, determining the most matching precoding weight of the interference source and the cell edge user in a preset codebook to obtain a second PMI value having the strongest orthogonality with the precoding weight; sending the second PMI value to the interference source to enable the interference source to schedule the users according to the second PMI value. According to the present invention, by using the feedback of the users and the interaction between the cells, the problems in the prior art that the severe district edge interference exists in a long term evolution (LTE) system, and the conventional interference coordination modes influence the overall system of the system at different degrees, so that a cell edge user interference problem can not be solved, and the user experiences are worse, are solved.
Description
Technical field
The present invention relates to communication field, more particularly to a kind of method coordinating Cell Edge User interference, dress
Put and base station.
Background technology
With the continuous development of mobile communication technology, user is proposed more to the content of mobile communication and quality
High requirement, including the miniaturization of communication equipment, low-power consumption, broadband access and abundant multimedia service.
More excellent than existing 3G (G mobile communication, 3rd-Generation) network in order to be lifted further
Performance, 3GPP (third generation partner program, 3rd Generation Partnership Project) propose
3G drills LTE (Long Term Evolution, Long Term Evolution) for a long time.
LTE adopts OFDM (orthogonal frequency-time multiple access, Orthogonal Frequency Divided
Multiple Access), OFDM technology, will by the use of the orthogonality between frequency as the mode distinguishing user
The information of user is carried on mutually orthogonal different carrier wave, can effective contrary frequency Selective intensity.
Further, since intra-cell users use frequency mutually orthogonal, all of interference all from other cells,
SINR (Signal to Interference plus Noise Ratio, the Signal to of Cell Center User can also be greatly improved
Interference plus Noise Ratio), such that it is able to provide higher data rate and more preferable service quality.
And for Cell Edge User, (region that wireless signal covers is referred to as cell, generally refers to a base
The scope that the signal stood can cover, cell edge is typically all the place covering difference, the user in the range of this
It is referred to as Cell Edge User), compare because the user that neighbor cell takies same carrier resource disturbs to it
Greatly, in addition in itself apart from base station farther out, its SINR is relatively just less, although leading to handling up of whole cell
Measure situation higher but that Cell Edge User service quality is poor, handling capacity is relatively low.
In order to solve the problems, such as this LTE system in cell edge serious interference, 3GPP proposes multiple solutions
Certainly scheme, deletes and interference coordination technique including interference randomization, interference.Wherein, interference randomization profit
With the statistical property of interference, interference is suppressed, error is larger；Interference deleting technique can significantly improve little
The systematic function of area edge, obtains higher spectrum efficiency, but the less business (as VoIP) for bandwidth
Then less applicable, realize also more complicated in an ofdm system, subsequently the research to it is few；Interference
Coordinate/avoid, be a hot technology of current research, it realizes simply, can apply to various bandwidth
Business, and have good effect for AF panel.
Currently for the interference coordination technique in down channel, it is a focus in correlative technology field.
But mostly it is confined to the means such as Power Control, resource block scheduling, and these means all have one to transmission performance
Fixed negative effect.For example, increase RB (Resource Block, the Resource Block) number of edge customer, undoubtedly
The available RB number of central user can be reduced, (system loading is higher also just to reduce the handling capacity of central user
When), cell total throughout decreases；Improve edge customer SINR means be this Cell Edge User with
Interference adjacent area central user uses the RB resource of same position, by reducing interference adjacent area center RB resource
Transmission power (when load is higher), or do not launch (when load is relatively low), to reduce adjacent area interference.So
And, the transmission power reducing interference adjacent area center RB resource is it is easy to interfere adjacent area central user
SINR, thus reduce central user and cell total throughout.
In sum, there is cell edge serious interference in LTE system in prior art, but existing
There is the overall performance of the impact system that interference coordination mode all can be different degrees of it is impossible to solve Cell Edge User
Interference problem, Consumer's Experience is poor.
Content of the invention
The present invention provides a kind of method coordinating Cell Edge User interference, device and base station, existing in order to solve
Have in technology and there is cell edge serious interference in LTE system, but existing interference coordination mode is all
The overall performance of impact system that can be different degrees of is it is impossible to solve the interference problem of Cell Edge User, user
Experience poor problem.
For solving above-mentioned technical problem, on the one hand, the present invention provides a kind of coordination Cell Edge User interference
Method, including：Receive RSRP (the Reference Signal Received Power, (Reference of Cell Edge User feedback
Signal Receiving Power) list, to determine the interference source the strongest to the interference of described Cell Edge User；
Receive described Cell Edge User and described interference source is carried out with PMI (the precoding square that channel estimation obtains
Battle array instruction, Precoding Matrix Indicator) value；According to described first PMI value, in default code book
Determine the precoding weights that described interference source is mated most with described Cell Edge User, to obtain prelisting with described
The second the strongest PMI value of code weight value orthogonality；Described second PMI value is sent to described interference source, with
Described interference source is made to carry out the scheduling of user according to described second PMI value.
Further, receive the RSRP list of Cell Edge User feedback, with determining, described cell edge is used
Family interference interference source the strongest, including：Receive the described RSRP list of described Cell Edge User feedback；
Select the maximum adjacent cell of RSRP value from described RSRP list, and determine that described adjacent cell is to described
Cell Edge User interference interference source the strongest.
Further, the described Cell Edge User of reception carries out first that channel estimation obtains to described interference source
Before PMI value, also include：Send to described Cell Edge User and channel estimation is carried out to described interference source
Configured information.
Further, send, to described Cell Edge User, the configured information that described interference source is carried out with channel estimation
Afterwards, also include：Described Cell Edge User parses the configured information of described channel estimation, described to obtain
The address information of interference source；Described interference source is read according to described address information, to carry out and described interference source
Channel estimation；Described first PMI value is determined according to described channel estimation.
Further, after receiving the Reference Signal Received Power RSRP list of Cell Edge User feedback, also
Including：Send the resource allocation information of user to described interference source；Receiving, described interference source feedback is described
Resource allocation information is collected mail in the case of breath really, determines that described interference source possesses interference coordination ability.
On the other hand, the present invention also provides a kind of device coordinating Cell Edge User interference, including：Receive
Module is for receiving the Reference Signal Received Power RSRP list of Cell Edge User feedback, right to determine
Described Cell Edge User interference interference source the strongest；Receive described Cell Edge User described interference source is entered
The first PMI value that row channel estimation obtains；Determining module, for according to described first PMI value, pre-
If determining the precoding weights that described interference source is mated most with described Cell Edge User in code book, with obtain with
The second the strongest PMI value of described precoding weights orthogonality；Sending module, for by described 2nd PMI
Value sends to described interference source, so that described interference source carries out the scheduling of user according to described second PMI value.
Further, described receiver module includes：Receiving unit, for receiving described Cell Edge User feedback
Described RSRP list；Determining unit, for selecting RSRP value maximum from described RSRP list
Adjacent cell, and determine that described adjacent cell is the interference source the strongest to the interference of described Cell Edge User.
Further, described sending module, is additionally operable to send described interference source is entered to described Cell Edge User
The configured information of row channel estimation.
Further, described sending module, is additionally operable to send the resource allocation information of user to described interference source；
Described determining module, is additionally operable to really collect mail breath receiving described interference source and feed back described resource allocation information
In the case of, determine that described interference source possesses interference coordination ability.
Another aspect, the present invention also provides a kind of base station, including：The coordination cell edge of any of the above item is used
The device of family interference.
Present invention utilizes the feedback information of user, determine according to RSRP list that Cell Edge User is done
Disturb interference source the strongest, it is later determined that this interference source and the first PMI value of Cell Edge User, recycle dry
The principle disturbed, determines the second the strongest PMI value of precoding weights orthogonality corresponding with the first PMI value, and
Interference source is made to carry out user scheduling, Consumer's Experience by this second PMI value higher, the method passes through user
Feedback and cell between interaction, solve exist in LTE system in prior art cell edge do
Disturb serious problem, but the overall performance of the impact system that existing interference coordination mode all can be different degrees of, no
Method solves the interference problem of Cell Edge User, the poor problem of Consumer's Experience.
Brief description
Fig. 1 is the flow chart of the method coordinating Cell Edge User interference in the embodiment of the present invention；
Fig. 2 is the structural representation of the device coordinating Cell Edge User interference in the embodiment of the present invention；
Fig. 3 is that the structure of the device receiver module coordinating Cell Edge User interference in the embodiment of the present invention is shown
It is intended to；
Fig. 4 is the flow chart of the disturbance coordination method of example one in the preferred embodiment of the present invention；
Fig. 5 is the flow chart of the disturbance coordination method of example two in the preferred embodiment of the present invention.
Specific embodiment
In order to solve the problems, such as there is cell edge serious interference in LTE system in prior art, but existing
Interference coordination mode all can be different degrees of impact system overall performance it is impossible to solve Cell Edge User
Interference problem, the poor problem of Consumer's Experience, the invention provides a kind of coordinate what Cell Edge User disturbed
Method, device and base station, below in conjunction with accompanying drawing and embodiment, the present invention will be described in further detail.
It should be appreciated that specific embodiment described herein, only in order to explain the present invention, does not limit the present invention.
Embodiments provide a kind of method coordinating Cell Edge User interference, the flow process of the method is such as
Shown in Fig. 1, including step S102 to S108：
S102, receives the RSRP list of Cell Edge User feedback, with determining, Cell Edge User is disturbed
Interference source the strongest；
S104, receives Cell Edge User and interference source is carried out with the first PMI value that channel estimation obtains；
S106, according to the first PMI value, determines interference source and Cell Edge User in default code book
The precoding weights joined, to obtain second PMI value the strongest with precoding weights orthogonality；
S108, the second PMI value is sent to interference source, so that interference source is used according to the second PMI value
The scheduling at family.
The embodiment of the present invention make use of the feedback information of user, determines cell edge according to RSRP list
User's interference interference source the strongest, it is later determined that the first PMI value of this interference source and Cell Edge User, then
Using the principle of interference, determine the 2nd the strongest PMI of precoding weights orthogonality corresponding with the first PMI value
Value, and it is higher to make interference source carry out user scheduling, Consumer's Experience by this second PMI value, the method is led to
Cross the interaction between the feedback of user and cell, solve in LTE system, in prior art, there is cell
The serious problem of marginal interference, but the globality of the impact system that existing interference coordination mode all can be different degrees of
Can be it is impossible to solve the interference problem of Cell Edge User, the poor problem of Consumer's Experience.
Before S102 realizes, base station needs to receive CSI (the channel status letter of each edge customer feedback
Breath, Channel State Information) and SINR value；Being determined according to CSI and SINR value needs to coordinate
The Cell Edge User group of interference, after determining Cell Edge User group, just uses for this cell edge
Cell Edge User in the group of family is monitored and interference coordination.
During S102 realizes, first receive the RSRP list of Cell Edge User feedback, then from RSRP
Select the maximum adjacent cell of RSRP value in list, and determine that adjacent cell is the strongest to Cell Edge User interference
Interference source.
Subsequently, base station sends the configured information that interference source is carried out with channel estimation to Cell Edge User.Cell
Edge customer parses the configured information of channel estimation, to obtain the address information of interference source；According to address information
Reading interference source, to carry out the channel estimation with interference source；First PMI value is determined according to channel estimation, and
First PMI value is sent to base station, so that base station reception Cell Edge User carries out channel to interference source and estimates
Count the first PMI value obtaining.After obtaining the first PMI value, execute S106 and S108 process.
In said process is realized, the acquiescence corresponding base station of interference source is main base corresponding with Cell Edge User
Station is likewise supplied with the base station of interference coordination ability, but in some cases, the corresponding base station in the source that may interfere with is simultaneously
Not necessarily possess interference coordination function, therefore, after receiving the RSRP list of Cell Edge User feedback,
The resource allocation information of user can also be sent to interference source, by whether receiving the acknowledgement of resource allocation information
Information is confirming whether interference source possesses interference coordination ability.It is being not received by interference source feedback resource allocation
Information is collected mail in the case of breath really, confirms that the current corresponding base station of interference source confirming does not possess interference coordination
Ability, redefines the next interference source the strongest to Cell Edge User interference；Anti- receiving interference source
Feedback resource allocation information is collected mail in the case of breath really, determines that interference source possesses interference coordination ability.
The embodiment of the present invention additionally provides a kind of device coordinating Cell Edge User interference, the structure of this device
Illustrate as shown in Fig. 2 including：Receiver module 10, for receiving the RSRP row of Cell Edge User feedback
Table, to determine the interference source the strongest to Cell Edge User interference；Receive Cell Edge User interference source is entered
The first PMI value that row channel estimation obtains；Determining module 20, is coupled with receiver module 10, for basis
First PMI value, determines, in default code book, the precoding weights that interference source is mated most with Cell Edge User,
To obtain second PMI value the strongest with precoding weights orthogonality；Sending module 30, with determining module 20
Coupling, for sending the second PMI value to interference source, so that interference source is used according to the second PMI value
The scheduling at family.
Fig. 3 shows the structural representation of above-mentioned receiver module 10, and it can include：Receiving unit 101,
For receiving the RSRP list of Cell Edge User feedback；Determining unit 102, with receiving unit 101 coupling
Close, for selecting the maximum adjacent cell of RSRP value from RSRP list, and determine that adjacent cell is to cell
Edge customer interference interference source the strongest.
During realization, sending module, it is additionally operable to send to Cell Edge User and channel is carried out to interference source estimate
The configured information of meter；It is additionally operable to send the resource allocation information of user to interference source；Determining module, is additionally operable to
Really collect mail in the case of breath receiving interference source feedback resource allocation information, determine that interference source possesses interference
The coordination ability.
The embodiment of the present invention additionally provides a kind of base station, and it includes above-mentioned coordination Cell Edge User interference
Device.Those skilled in the art, according to above-mentioned record, know how to do above-mentioned coordination Cell Edge User
The device disturbed is integrally disposed in a base station, and here is omitted.
Preferred embodiment
Embodiments provide a kind of disturbance coordination method of Cell Edge User it is therefore intended that passing through to use
Interaction between the feedback at family and cell, solves the problems, such as the strong jamming of edge customer.The embodiment of the present invention carries
For method as follows, including：During coordinates interference, (mainly it is responsible for complete by LTE network management system backstage
The parameter configuration of net, management, alarm, the function such as fault tentative diagnosis and regular maintenance) with static, half
Either statically or dynamically form determines a SINR threshold value for defining Cell Edge User, that is, useful from institute
In family, edge customer is distinguished, subsequent operation is mainly for such user.
Base station distinguishing cell edge customer in aforementioned manners, this disturbance coordination method is exactly that such user is carried out
Operations described below, to reduce the co-channel interference of minizone as far as possible.
Wherein, the static configuration in said process refers to keep constant for after SINR threshold settings, for example
0dB；Be semi-statically configured finger for minizone slower speeds interact intra-cell users power information, cell load information,
Resource allocation information, interference information etc., cell utilizes these information, coordinated resource allocation and power distribution,
Reach the purpose of interference coordination, for example, ICIC (Inter-Cell Interference Coordination, Inter Cell Interference
Coordination) it is E-UTRA (the UMTS land face wireless access of evolution, Evolved Universal
Terrestrial Radio Access) typical coordinating semi-static interference technology in system, its information exchange and dynamic
The cycle made is usually a few tens of milliseconds to hundreds of millisecond；And dynamic configuration refers to SINR threshold value with correlation about
Bundle condition real-time adjustment.
The CSI that base station is fed back according to edge customer, and combine SINR value, determine be interfered stronger little
Area edge user, and mark these users.Disturbing and differing due to what edge customer received, so needing
To be determined by CSI, SINR and to receive the stronger edge customer of interference, the method that subsequent interference is coordinated is
Can effectively implement.
Base station measures list according to the RSRP that Cell Edge User feeds back, and finds the strong interferers of user, by force
Interference source is probably adjacent base station, or cell (Small cell).Now RSRP measurement will be paid close attention to frequency
Measurement, the absolute value according to interference level determines strong interferers.
Base station sends the resource allocation information of user to strong interferers, can be to be sent with bitmap mode；Capable and experienced
After the source of disturbing receives the bitmap information that above-mentioned base station sends, return confirmation to base station.
If base station does not receive the confirmation from corresponding base station in regulation time delay, this time interference association
Fail.If base station receives the confirmation from corresponding base station in regulation time delay, base station is to cell
Edge customer sends dynamic or semi-static configured information, notifies these users to need the extra strong interferers that measure to believe
Road information, for example, base station is in PDCCH (Physical Downlink Control Channel, Physical Downlink Control
Channel) inner notifying cell edge customer needs additionally to measure and feed back the pilot signal of strong interferers.Always
It, said process is exactly to confirm real strong interferers base station.
The Cell Edge User cycle or aperiodicity feedback channel measurement to strong interferers, can quantify
For PMI information, that is, interference source base station is to channel PMI (power) value of disturbed edge customer.Precoding is
One of multiaerial system adaptive technique, i.e. the CSI according to channel, in the adaptive change of transmitting terminal
Pre-coding matrix, plays and changes the effect that signal experiences channel.Transmitting-receiving two-end all store a set of comprise some
The code book of individual pre-coding matrix, such receiver can select according to the channel matrix estimating and a certain criterion
One of pre-coding matrix, and by the information feedback after its index value and quantization to transmitting terminal；
In the next moment, transmitting terminal adopts new pre-coding matrix, and quantifies letter according to the channel status feeding back to
Cease and determine coding and modulation system for code word.
Interference source base station receive Cell Edge User feedback from the corresponding PMI information of high reject signal, root
According to these information, the pre-coding scheme to Cell Edge User for the interference source base station adjustment, thus reduce interference.
With instantiation, said method is further described below in conjunction with the accompanying drawings.
Example one
The present embodiment is the Inter-Cell Interference Coordination scheme based on wide-band-message, and shown in its flow process Fig. 4, this is done
Disturb coordination approach and include step S401 to step S406.
Step S401：According to CQI, (channel quality indicates, Channel Quality Indicator, CSI's
One of parameter) and SINR determine the Cell Edge User of base station 1.
System through counting after a while, finds to there are some user's bit error rates in some regions higher, and
Handling capacity is very low, then enable Inter-Cell Interference Coordination function by LTE network management system, with semi-static side
Formula configuration Cell Edge User screening thresholding SINR_Threshold, according to this thresholding, base station 1 is anti-from user
In the broadband CQI (i.e. whole LTE bandwidth reports a CQI) of feedback, select the corresponding SINR of CQI low
In the user of SINR_Threshold, then these users are judged to Cell Edge User, if base station 1
Screening user 1 according to broadband CQI is Cell Edge User.
Step S402：The corresponding base station of strong interferers 2 is determined according to RSRP list.
The adjacent cell RSRP list that base station 1 is fed back recently according to user 1, therefrom selects RSRP value maximum
Adjacent cell, then this cell be the cell of strong jamming of user 1 it is assumed that this cell respective base station 2.
Step S403：User 1 carries out channel estimation to interference source, obtains PMI2 value.
Base station 1, in subsequent PDCCH channel, sends strong jamming cell ID of 3 bits to user 1
Configured information, the strong jamming cell of this user 1 is base station 2, then strong jamming cell ID is designated as " 010 ",
User 1, by blind check and after demodulating PDCCH channel, reads the instruction of strong jamming cell ID, Ran Hougen
According to this instruction, to the channel of oneself, channel estimation is carried out to base station 2, and obtained according to channel estimation results
The PMI value joined, as PMI2.
Step S404：User 1 feedback PMI2 value is to base station 1.
User 1 in subsequent CSI feedback, except feed back oneself arrive Serving cell (base station 1) broadband
Outward, additional feedback oneself arrives strong jamming cell (base to CQI1/PMI1/RI1 (Rank Indication, order instruction)
Stand 2) broadband PMI2, the corresponding Bit String of PMI2 can be placed on after PMI1, i.e. script user 1
As long as the PMI information of feedback 2 bits, it is now to feed back the PMI information of 4 bits, wherein front 2 bits
For PMI1, the PMI of corresponding user 1 to base station 1,2 bits are PMI2 afterwards, and corresponding user 1 arrives base station
2 PMI.
Step S405：PMI3 is determined by PMI2.
After base station 1 receives the feedback information of user 1, by reading PMI2, then understand and arrived with base station 2
The precoding weights of the channel of user 1 coupling, base station 1 selects the strongest with this weights orthogonality from code book
PMI3, then precoding weights PMI3 recommended to base station 2 as base station 1 index.
Step S406：PMI3 is recommended base station 2 by base station 1, to carry out interference coordination.
Before base station 1 determines user 1 to be dispatched, by X2 interface, send 2 bits to base station 2
Recommend precoding information, i.e. PMI3, if base station 2 also enables Inter-Cell Interference Coordination function, base
Stand 2 receive from base station 1 send recommendation precoding index after, just understood base station 1 wish oneself use
With the precoding weights recommending precoding to index strong correlation, then, when dispatching user, can to the greatest extent may be used in base station 2
Feedback PMI and PMI3 user relatively can be selected to dispatch.If base station 2 receives many nearby simultaneously
The precoding index that individual base station is recommended, then can be compared by each edge customer SINR value, excellent to determine
The PMI value first using, when that is, base station 1 sends to base station 2 and recommends PMI3, sends cell edge simultaneously and uses
The SINR weights at family, to help base station 2 to determine priority.If edge customer terminates this access,
Base station 1 notifies base station 2, and base station 2 reduces the priority that PMI3 uses.This this interference coordination terminates.
By said process it is achieved that interference coordination between base station 1 and base station 2, the interference of user 1 is big
Big reduction, the bit error rate can be can be effectively reduced, thus improve handling capacity, improves Consumer's Experience.
Example two
The present embodiment is the Inter-Cell Interference Coordination scheme based on sub-band information, and shown in its flow process Fig. 5, this is done
Disturb coordination approach and include step S501 to step S506.
Step S501：It is cell side that base station 1 screens user 1 upper in subband [1,2] according to subband CQI
Edge user.
System through counting after a while, finds to there are some user's bit error rates in some regions higher, and
Handling capacity is very low, then enable Inter-Cell Interference Coordination function by LTE network management system, with semi-static side
Formula configuration frequency selects Cell Edge User screening thresholding SINR_Threshold, according to this thresholding, base station 1 from
The subband CQI of family feedback (entirely LTE bandwidth will be divided into multiple subbands, that is, multiple little bandwidth, often
One CQI, so-called frequency selectivity CQI are reported on individual little bandwidth) in, select the corresponding SINR of CQI
Less than the user of SINR_Threshold, and which subband of these users is marked to be the poor subband of SINR,
Then these users are judged as frequency in corresponding subband and select Cell Edge User, if base station 1 is according to subband CQI
Screening user 1 upper in subband [1,2] is Cell Edge User.
Step S502：The corresponding base station of strong interferers 2 is determined according to RSRP list.
The adjacent cell RSRP list that base station 1 is fed back recently according to user 1, therefrom selects RSRP value maximum
Adjacent cell, then this cell be the cell of strong jamming of user 1 it is assumed that this cell respective base station 2.
Step S503：User 1 carries out channel estimation to interference source base station 2, obtains corresponding subband 1
The PMI2_1 and PMI2_2 of subband 2.
Base station 1, in subsequent PDCCH channel, sends strong jamming cell ID of 3 bits to user 1
Configured information, the strong jamming cell of this user 1 is base station 2, then strong jamming cell ID is designated as " 010 ",
Base station 1 user 1 also to be given sends subband bitmap simultaneously, needs in which subband for instruction user 1
Measurement strong jamming cell channel, if system is 10MHz bandwidth, corresponds to 8 subbands, then base station 1 will be given
User 1 sends " 11000000 ", and instruction user 1 receives strong jamming on subband 1,2.User 1 passes through blind
After examining and demodulate PDCCH channel, read the instruction of strong jamming cell ID and the instruction of strong jamming subband,
Then indicated according to these, to the channel of oneself, channel estimation is carried out to base station 2, and tied according to channel estimation
Fruit obtains the PMI value mated, and corresponding subband 1 and subband 2 are respectively PMI2_1, PMI2_2.
Step S504：PMI2_1 and PMI2_2 is fed back to base station 1 by user.
User 1 in subsequent CSI feedback, except feed back oneself arrive Serving cell (base station 1) broadband
Outside CQI1/PMI1/RI1, additional feedback oneself arrives strong jamming cell (base station 2) corresponding subband 1 and subband 2
PMI2_1, PMI2_2, the corresponding Bit String of PMI2_1, PMI2_2 can be placed on after PMI1,
As long as i.e. script user 1 feeds back the PMI information of 2 bits, it is now to feed back the PMI information of 6 bits,
Wherein front 2 bits are PMI1, and corresponding user 1 arrives the PMI of base station 1, afterwards 4 bits be respectively PMI2_1,
PMI2_2PMI2, corresponding user 1 PMI on subband 1, subband 2 to base station 2.
Step S505：Base station 1 selects and PMI2_1, PMI2_2 orthogonality the strongest PMI3_1, PMI3_2.
After base station 1 receives the feedback information of user 1, by reading PMI2_1, PMI2_2, then understand
The precoding weights mating most with channel on subband 1, subband 2 for the base station 2 to user 1, base station 1 from
In code book, then using on the subband 1 recommended to base station 2 as PMI3_1, PMI3_2 base station 1, subband 2
Precoding weights index.
Step S506：PMI3_1, PMI3_2 are recommended base station 2 by base station 1, to carry out interference coordination.
Base station 1 determines will dispatch user 1 on subband 1, then pass through X2 interface, send 2 to base station 2
The recommendation precoding information of bit, i.e. PMI3_1, and indicate corresponding subband 1, if base station 1 determines wanted
Dispatch user 1 on subband 2, then pass through X2 interface, send the PMI3_2 of 2 bits to base station 2, and
And indicate corresponding subband 2, if base station 2 also enables Inter-Cell Interference Coordination function, base station 2 receives
After the recommendation precoding index that base station 1 sends, just understand that base station 1 wishes oneself using pre- with recommendation
The precoding weights of code index strong correlation, then base station 2, when dispatching user, can correspond to as far as possible
Feedback PMI and PMI3_1 or PMI3_2 user relatively is selected to dispatch on subband.If base station
2 receive the precoding index that nearby multiple base station are recommended simultaneously, then can pass through each edge customer SINR
Value compares, to determine the PMI value of preferential use, that is, base station 1 send to base station 2 recommend PMI3_1 or
During PMI3_2, send the SINR weights of Cell Edge User, to help base station 2 to determine priority simultaneously.
If edge customer terminate this access, base station 1 notify base station 2, base station 2 reduce PMI3_1 or
The priority that PMI3_2 uses.This this interference coordination terminates.
By said process it is achieved that interference coordination between base station 1 and base station 2, the interference of user 1 is big
Big reduction, the bit error rate can be can be effectively reduced, thus improve handling capacity, improves Consumer's Experience.
Although being example purpose, have been disclosed for the preferred embodiments of the present invention, those skilled in the art will
Recognize that various improvement, increase and replacement are also possible, therefore, the scope of the present invention should be not limited to
State embodiment.
Claims (10)
1. a kind of method coordinating Cell Edge User interference is it is characterised in that include：
Receive the Reference Signal Received Power RSRP list of Cell Edge User feedback, to determine to described little
Area edge user interference interference source the strongest；
Receive described Cell Edge User and described interference source is carried out with the first PMI value that channel estimation obtains；
According to described first PMI value, default code book determines described interference source and described Cell Edge User
The precoding weights of coupling, to obtain second PMI value the strongest with described precoding weights orthogonality；
Described second PMI value is sent to described interference source, so that described interference source is according to described 2nd PMI
Value carries out the scheduling of user.
2. the method coordinating Cell Edge User interference as claimed in claim 1 is it is characterised in that connect
Zoom in the Reference Signal Received Power RSRP list of area edge user feedback, to determine to described cell edge
User's interference interference source the strongest, including：
Receive the described RSRP list of described Cell Edge User feedback；
Select the maximum adjacent cell of RSRP value from described RSRP list, and determine that described adjacent cell is right
Described Cell Edge User interference interference source the strongest.
3. the method coordinating Cell Edge User interference as claimed in claim 1 is it is characterised in that connect
Receive before described Cell Edge User carries out, to described interference source, the first PMI value that channel estimation obtains, also wrap
Include：
Send the configured information that described interference source is carried out with channel estimation to described Cell Edge User.
4. as claimed in claim 3 coordinate Cell Edge User interference method it is characterised in that to
Described Cell Edge User sends after carrying out the configured information of channel estimation to described interference source, also includes：
Described Cell Edge User parses the configured information of described channel estimation, to obtain the ground of described interference source
Location information；
Described interference source is read according to described address information, to carry out the channel estimation with described interference source；
Described first PMI value is determined according to described channel estimation.
5. the method coordinating Cell Edge User interference as any one of Claims 1-4, its
It is characterised by, after receiving the Reference Signal Received Power RSRP list of Cell Edge User feedback, also wrap
Include：
Send the resource allocation information of user to described interference source；
Really collect mail in the case of breath receiving described interference source and feeding back described resource allocation information, determine institute
State interference source and possess interference coordination ability.
6. a kind of device coordinating Cell Edge User interference is it is characterised in that include：
Receiver module, for receiving the Reference Signal Received Power RSRP list of Cell Edge User feedback,
To determine the interference source the strongest to the interference of described Cell Edge User；Receive described Cell Edge User to described
Interference source carries out the first PMI value that channel estimation obtains；
Determining module, for according to described first PMI value, determining described interference source and institute in default code book
State the precoding weights of Cell Edge User coupling, the strongest with described precoding weights orthogonality to obtain
Second PMI value；
Sending module, for described second PMI value is sent to described interference source, so that described interference source root
Carry out the scheduling of user according to described second PMI value.
7. the device coordinating Cell Edge User interference as claimed in claim 6 is it is characterised in that institute
State receiver module to include：
Receiving unit, for receiving the described RSRP list of described Cell Edge User feedback；
Determining unit, for selecting the maximum adjacent cell of RSRP value from described RSRP list, and determines
Described adjacent cell is the interference source the strongest to the interference of described Cell Edge User.
8. as claimed in claim 6 coordinate Cell Edge User interference device it is characterised in that
Described sending module, is additionally operable to send to described Cell Edge User and carries out channel to described interference source and estimate
The configured information of meter.
9. the device coordinating Cell Edge User interference as any one of claim 6 to 8, its
It is characterised by,
Described sending module, is additionally operable to send the resource allocation information of user to described interference source；
Described determining module, is additionally operable in the acknowledgement receiving the described interference source described resource allocation information of feedback
In the case of information, determine that described interference source possesses interference coordination ability.
10. a kind of base station is it is characterised in that include：Coordination any one of claim 6 to 9
The device of Cell Edge User interference.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448254.4A CN106413005A (en) | 2015-07-27 | 2015-07-27 | Method and device of coordinating cell edge user interference and base station |
| PCT/CN2016/091873 WO2017016477A1 (en) | 2015-07-27 | 2016-07-27 | Interference coordination method and apparatus for cell edge user, and base station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448254.4A CN106413005A (en) | 2015-07-27 | 2015-07-27 | Method and device of coordinating cell edge user interference and base station |
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| CN106413005A true CN106413005A (en) | 2017-02-15 |
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| CN201510448254.4A Pending CN106413005A (en) | 2015-07-27 | 2015-07-27 | Method and device of coordinating cell edge user interference and base station |
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| WO (1) | WO2017016477A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110809861A (en) * | 2017-06-29 | 2020-02-18 | 华为技术有限公司 | Base station data transmission method, device and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109996187A (en) * | 2017-12-29 | 2019-07-09 | 财团法人工业技术研究院 | Action edge platform server and its device and approaches to IM of car networking service |
| CN109874177B (en) * | 2019-04-01 | 2023-02-10 | 海能达通信股份有限公司 | Inter-cell interference coordination method, device and server |
| CN114257256B (en) * | 2021-12-15 | 2023-08-15 | 哲库科技(北京)有限公司 | Noise estimation method, apparatus, device, and readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070149242A1 (en) * | 2005-12-03 | 2007-06-28 | Samsung Electronics Co., Ltd. | Method and apparatus for canceling neighbor cell interference signals in an orthogonal frequency division multiple access system |
| US8554241B2 (en) * | 2008-03-28 | 2013-10-08 | Lg Electronics Inc. | Method for avoiding inter-cell interference in a multi-cell environment |
| KR101568291B1 (en) * | 2009-07-10 | 2015-11-20 | 삼성전자주식회사 | Terminal device and base station and operating method of the terminal device |
| US10044487B2 (en) * | 2012-11-30 | 2018-08-07 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Interference management in wireless multi-access communication networks |
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2015
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110809861A (en) * | 2017-06-29 | 2020-02-18 | 华为技术有限公司 | Base station data transmission method, device and equipment |
| CN110809861B (en) * | 2017-06-29 | 2021-08-20 | 华为技术有限公司 | Base station data transmission method, device and equipment |
| US11122569B2 (en) | 2017-06-29 | 2021-09-14 | Huawei Technologies Co., Ltd. | Method and apparatus for transmitting base station data, and device |
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| WO2017016477A1 (en) | 2017-02-02 |
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