CN108540253A - A kind of method and device reducing heterogeneous network inter-cell interference - Google Patents
A kind of method and device reducing heterogeneous network inter-cell interference Download PDFInfo
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- CN108540253A CN108540253A CN201710129214.2A CN201710129214A CN108540253A CN 108540253 A CN108540253 A CN 108540253A CN 201710129214 A CN201710129214 A CN 201710129214A CN 108540253 A CN108540253 A CN 108540253A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
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Abstract
The present invention provides it is a kind of reduce heterogeneous network inter-cell interference method and device, the method includes：For LTE in frequency heterogeneous network using enhancing Inter-Cell Interference Coordination eICIC macro base station, record the macro base station be sent to end side almost blank subframe ABS identifier；According to the identifier of the ABS, the reference signal RS on ABS sent to the macro base station is adjusted so that only sends RS signals in continuous N number of RB bandwidth when the macro base station sends the ABS；Wherein, N is more than or equal to 1 and is less than the corresponding RB quantity of carrier bandwidths.The present invention can reduce network interferences, and promote the network carrying efficiency while ensureing the measurement of terminal.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of methods and dress reducing heterogeneous network inter-cell interference
It sets.
Background technology
The Inter-Cell Interference Coordination (eICIC) of enhancing is that (ICIC is interference coordination technique between the common frequency multi-cell in time domain
Interference coordination is referred to as Inter-Cell Interference Coordination between common frequency multi-cell on frequency domain), single frequency point when only for identical networking
Scene.It is " the almost subframe (ABS) of blank " by the one or more sub-frame configurations of macrocell handle, Microcell is small on ABS
Area edge terminal (UE) provides service, so as to avoid main interference (coming from macrocell), to improve cell edge UE
Service speed, as shown in Figure 1.
In eICIC technologies, ABS not transmission data signals are such as saved according to agreement 36.133-e00 versions A3.4, for
1X2 antenna configurations, PBCH send situation, and channel sends as shown in table 1：
1 ABS of table sends the configuration of PBCH scheme transmissions
It is less that channel is sent when not sending PBCH channels, only sends synchronizing signal, as shown in table 2：
2 ABS of table does not send the configuration of PBCH scheme transmissions
However, there are still defects for the ABS schemes of eICIC, i.e., it still continuously emits downlink in institute's having time and all PRB
It is as shown in Figure 2 to send position for reference signal (RS).The RS signals of ABS are fig. 3, it is shown that ABS on time-frequency domain
The same with non-ABS, RS signals are uniformly distributed in all PRB.
In LTE, the settings of RS signals is primarily to carry out channel estimation, due to ABS not transmission data signals, at this
Subframe by sending RS signals without carrying out channel estimation.But due to the characteristic of LTE identical networkings, this cell RS letters
Number transmission can cause overlapping covering upper zone inter-cell interference：1) when being interfered there are the conflict of mould 3, this cell macro station RS
Signal will bring interference to the RS signals of this cell low power nodes (Lower Power Node, LPN)；2) under adjacent cell physics
The shared channel (PDSCH) of row is interfered by this cell CRS；3) adjacent cell Physical Downlink Control Channel (PDCCH) is by this cell
CRS is interfered；4) when being interfered there are the conflict of mould 3, adjacent cell CRS will also be interfered by this cell CRS.
When therefore, using traditional algorithm, the RS signals that ABS is sent can not play the role of its design, and can draw simultaneously
Play the co-channel interference of LPN and adjacent cell in cell.
Invention content
In view of the drawbacks of the prior art, the present invention provides it is a kind of reduce heterogeneous network inter-cell interference method and device,
LTE can be reduced with LPN and neighbour in cell caused by the RS signals for using the macro station ABS of eICIC technologies to send in frequency heterogeneous network
The co-channel interference of cell.
In a first aspect, the present invention provides a kind of method reducing heterogeneous network inter-cell interference, the method includes：
For LTE with the macro base station for the Inter-Cell Interference Coordination eICIC for using enhancing in frequency heterogeneous network, the macro base is recorded
Station is sent to the identifier of the subframe ABS of the almost blank of end side；
According to the identifier of the ABS, the reference signal RS on ABS sent to the macro base station is adjusted so that
When the macro base station sends the ABS only RS signals are sent in continuous N number of RB bandwidth；Wherein, N is more than or equal to 1 and less than load
The corresponding RB quantity of wavestrip width.
Optionally, according to the identifier of the ABS, the reference signal RS on ABS sent to the macro base station is adjusted
It is whole so that RS signals only are sent in continuous N number of RB bandwidth when the macro base station sends the ABS, including：
According to the identifier of the ABS, determine that the macro base station need to be sent to the ABS of the end side；
RS signals on the ABS are adjusted so that only in 6 RB in centre when the macro base station sends the ABS
Bandwidth sends the RS signals, and the ABS, which is reduced to 1.4MHz operating modes, sends cell reference signals CRS.
Optionally, the method further includes：
On the ABS after being adjusted to RS service is provided for cell-edge terminals.
Optionally, the method further includes：
In the ABS after being adjusted to RS, according to preset transmission configuration send physical downlink control channel PDCCH,
Physical Broadcast Channel PBCH, Physical Downlink Shared Channel PDSCH and Physical Control Format Indicator Channel PCFICH.
Optionally, the method further includes：
According to the identifier of the ABS, RS is continuously transmitted on all PRB when the macro base station sends the subframe of non-ABS
Signal.
Second aspect, the present invention provides a kind of device reducing heterogeneous network inter-cell interference, described device includes：
Identifier record unit is used for for LTE with the Inter-Cell Interference Coordination eICIC's for using enhancing in frequency heterogeneous network
Macro base station, record the macro base station be sent to end side almost blank subframe ABS identifier；
RS adjustment units, for the identifier according to the ABS, to the reference signal on the ABS of macro base station transmission
RS is adjusted so that only sends RS signals in continuous N number of RB bandwidth when the macro base station sends the ABS；Wherein, N is big
In equal to 1 and less than the corresponding RB quantity of carrier bandwidths.
Optionally, the RS adjustment units, are specifically used for：
According to the identifier of the ABS, determine that the macro base station need to be sent to the ABS of the end side；
RS signals on the ABS are adjusted so that only in 6 RB in centre when the macro base station sends the ABS
Bandwidth sends the RS signals, and the ABS, which is reduced to 1.4MHz operating modes, sends cell reference signals CRS.
Optionally, described device further includes：Service unit is used for：
On the ABS after being adjusted to RS service is provided for cell-edge terminals.
Optionally, described device further includes：Transmission unit is used for：
In the ABS after being adjusted to RS, according to preset transmission configuration physical downlink control channel PDCCH, physics
Broadcast channel PBCH, Physical Downlink Shared Channel PDSCH and Physical Control Format Indicator Channel PCFICH.
Optionally, described device further includes：RS transmission units, are used for：
According to the identifier of the ABS, RS is continuously transmitted on all PRB when the macro base station sends the subframe of non-ABS
Signal.
As shown from the above technical solution, the present invention provide it is a kind of reduce heterogeneous network inter-cell interference method and device in,
For LTE with the macro base station for using eICIC in frequency heterogeneous network, the son that the macro base station is sent to the almost blank of end side is recorded
The identifier of frame ABS；According to the identifier of the ABS, the reference signal RS on ABS sent to the macro base station is adjusted
It is whole so that only to send RS signals in continuous N number of RB bandwidth when the macro base station sends the ABS, so reduce in ABS sending
The bandwidth of RS reduces LTE with the macro station ABS transmission RS letters for using eICIC technologies in frequency heterogeneous network to ensure the measurement of terminal
The co-channel interference of LPN and adjacent cell in cell caused by number, improve network carrying efficiency.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these figures.
Fig. 1 is the basic principle schematic of eICIC；
Fig. 2 is that the RS signals of ABS send the schematic diagram of position；
Fig. 3 is the time-frequency domain RS signal distributions schematic diagrames of traditional ABS；
Fig. 4 is a kind of flow diagram of the method for reduction heterogeneous network inter-cell interference that one embodiment of the invention provides；
Fig. 5 is the time-frequency domain RS signal distributions schematic diagrames for the MBS that another embodiment of the present invention provides；
Fig. 6 is a kind of structural schematic diagram of the device for reduction heterogeneous network inter-cell interference that one embodiment of the invention provides；
Fig. 7 is a kind of structure diagram of the equipment for reduction heterogeneous network inter-cell interference that one embodiment of the invention provides.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 4 is a kind of flow diagram of the method for reduction heterogeneous network inter-cell interference in one embodiment of the invention, this
The executive agent of embodiment is macro base station, as shown in figure 4, described method includes following steps：
S1：For LTE in frequency heterogeneous network using the macro base station of the Inter-Cell Interference Coordination eICIC of enhancing, described in record
Macro base station is sent to the identifier of the subframe ABS of the almost blank of end side.
Specifically, in LTE heterogeneous networks, the same Microcell of macro base station (Pico), Home eNodeB (Femto), relay node
(Relay) etc. when low power nodes (Lower Power Node, LPN) use identical networking, for the macro base using eICIC
It stands, records the ABS identifiers (ABS ID) that the macro base station is handed down to the side terminal (UE) first.
S2：According to the identifier of the ABS, the reference signal RS on ABS sent to the macro base station is adjusted, and is made
It obtains and only sends RS signals in continuous N number of RB bandwidth when the macro base station sends the ABS；Wherein, N is more than or equal to 1 and is less than
The corresponding RB quantity of carrier bandwidths.
Wherein, N is more than or equal to 1 and is less than the corresponding RB quantity of carrier bandwidths, such as sets carrier bandwidths as 20M (i.e. 100
RB), then N is more than or equal to 1 and is less than 100.Preferably, N takes 6.
Preferably, continuous N number of RB bandwidth is：Continuous 6 RB bandwidth of each corresponding centres ABS.
Then specifically, the step S2 includes：
According to the identifier of the ABS, determine that the macro base station need to be sent to the ABS of the end side；To on the ABS
RS signals be adjusted so that only send the RS signals in intermediate 6 RB bandwidth when the macro base station sends the ABS,
The ABS is reduced to 1.4MHz operating modes and sends cell reference signals CRS.
As shown in figure 5, only sending RS signals in intermediate 6 RB bandwidth when sending ABS, which is reduced to 1.4MHz
Operating mode sends the measurement that CRS ensures terminal, for reducing network interferences, promotes network carrying efficiency.For same tradition ABS tables
Show difference, subframe that can be at this time is referred to as " the more subframe (More Blank Subframe, MBS) of blank ".
In the present embodiment, for LTE with the macro base station for using eICIC in frequency heterogeneous network, records the macro base station and be sent to
The identifier of the subframe ABS of the almost blank of end side；According to the identifier of the ABS, on the ABS sent to the macro base station
Reference signal RS be adjusted so that only send RS letters in continuous N number of RB bandwidth when the macro base station sends the ABS
Number, so reduce ABS in send RS bandwidth to ensure the measurement of terminal, reduce LTE in frequency heterogeneous network use eICIC skills
The macro station ABS of art sends the co-channel interference of LPN and adjacent cell in cell caused by RS signals, improves network carrying efficiency.
Further, in an alternate embodiment of the present invention where, after above-mentioned steps S2, the method further includes as follows
Step：
S3：On the ABS after being adjusted to RS service is provided for cell-edge terminals.
Specifically, macro base station by one or more sub-frame configurations be above-mentioned MBS subframes (i.e. by step S2 to RS into
ABS after row adjustment) after, Microcell provides service in the MBS subframes for cell-edge terminals (UE), so as to avoid master
The interference (coming from macrocell) wanted, to improve the service speed of cell edge UE.
In an alternate embodiment of the present invention where, after step S2, the method further includes following steps：
S3’：In the ABS after being adjusted to RS, Physical Downlink Control Channel is sent according to preset transmission configuration
PDCCH, Physical Broadcast Channel PBCH, Physical Downlink Shared Channel PDSCH and Physical Control Format Indicator Channel PCFICH.
Specifically, it is such as saved according to agreement 36.133-e00 versions A3.4, for 1X2 antenna configurations, shown in table 1
Transmission configuration sends PDCCH, PBCH, PDSCH and PCFICH, and in above-mentioned MBS subframes, PDCCH, PBCH, PDSCH and
Normal send may be selected in the channels such as PCFICH.
In an alternate embodiment of the present invention where, after step S1, the method further includes following steps：
S2’：According to the identifier of the ABS, continuously sent out on all PRB when the macro base station sends the subframe of non-ABS
Send RS signals.
Specifically, according to the identifier of the ABS, determine that the macro base station does not do the subframe of the non-ABS of ABS, then
Normal RS is kept to send the RS signals of the subframe of non-ABS, i.e., as shown in figure 3, the RS signals in the subframe of non-ABS uniformly divide
It is distributed in all PRB.
Further, another embodiment of the present invention is provided in the case where lifting mould 3 and interfering, using traditional ABS and above-described embodiment
In MBS (ABS after being adjusted to RS by step S2) eliminate adjacent cell to the effects pair of this cell RS signal interferences
Than theoretical calculation is as follows：
(1) macro station, skin station RS transmission powers
The D frequency ranges at the skin station in consideration macro station coverage area are with frequency covering scene, if carrier bandwidths are 20M (100 RB),
Macro station single channel transmission power is 20W, and skin station power single channel transmission power is 125mW, 350 meters from macro station, UE of skin stop spacing
It is a wall with the partition of macro station signal in interior.RS power is：
DL_RS_Power=PSingle channel-10×log(12×NRB)+10×log(1+Pb) (1.1)
Wherein, PSingle channelFor RRU single channel transmission powers, NRBFor RB numbers, PbTo indicate EPRE (Energy Per on PDSCH
Resource Element) power factor ratio instruction.
If carrier bandwidths are 20M (NRBFor 100), macro station PSingle channelFor 20W, skin station PSingle channelFor 124mW, PbIt is 1.
Then macro station RS power is：
DL_RS_PowerMac=43dBm-10 × log (12 × 100)+10 × log (1+1)=15.2dBm
Skin station RS power is：
DL_RS_PowerMic=21dBm-10 × log (12 × 100)+10 × log (1+1)=- 6.8dBm
(2) path loss
1. macro station signal path is lost：If propagation scene is dense urban, using COST231-Hata models, path loss
Expression formula is：
L=46.3+33.9lg (f) -13.82lg (hb)-α(hm)+(44.9+6.55lg(hb))lg(d)+Cm (2.1)
Wherein, hbFor base station antenna height, this case value is 35m；hmFor UE height, this case value is 1.5m；α(hm) be
The UE height correction factors, hmFor 1.5m when value be 0；F is carrier frequency, and this case value is 2600MHz；CmIt is right for correction factor
It is 0 in medium-sized city, suburb center value, is 3dB for big city value, this case value is 3dB；D be launch point with connect
Sink horizontal distance, this case value are 0.35km.Then path loss is：
Lmac=46.3+33.9lg (f) -13.82lg (hb)-α(hm)+(44.9+6.55lg(hb))lg(d)+Cm
=46.3+33.9lg (2600) -13.82lg (35) -0+ (44.9+6.55lg (35)) lg (0.35)+3
=122.73dB
2. skin station signal path is lost：Interior Keenan-Motley spatial models are used for skin station path loss,
Path loss expression is：
L=32.4+20lg (d)+20lg (f) (2.2)
Wherein f is carrier frequency, and this case value is 2600MHz；D is launch point and receiving point horizontal distance, this case, that is, skin
It stands and covers edge, value 0.06km.Then skin station signal path, which is lost, is：
Lmic=32.4+20lg (0.06)+20lg (2600)=76.26dB
(3) RS signal receiving strengths
If macro station signal penetrates two walls, it is lost as 6dB, macro station antenna gain 16dBi；Skin station signal is obstructed without wall,
Indoor furniture, glass equal loss 16dB, skin station antenna gain 2dBi, ignore other gains such as MIMO gains.
1. macro station RS receiving intensities
Mac_RS_Powerr=15.2dBm-122.73dB-6dB+16dBi=-97.53dBm
2. skin station RS receiving intensities
Mic_RS_Powerr=-6.8dBm-76.26dB-16dB+2dBi=-97.06dBm
(4) RS signals SINR
If UE serves skin station, N is made an uproar as 101dBm in bottom, and assumes that skin station UE is only interfered by macro station, when there are the interference of mould 3
When, eICIC original ABS schemes：
If it is 5MHz that UE, which measures RS signal bandwidths, then RB numbers are 25, and RE numbers shared by RS are 100 (1 or 2 antennas)；This
Technical solution is arranged MBS and measures 1.4MHz, and RB numbers are 6, and RE numbers shared by RS are 24.
For this programme, the RS signal transmitted bandwidths of MBS are 1.4MHz, then silence RE increased with respect to 5MHz transmitted bandwidths
Number is 76.
Due to the mean power for the RS signals place RE that RSRP is all measurements, therefore have:
(5) MBS schemes are promoted
By (5.1), (5.2) as a result, MBS schemes reduce adjacent macro station cell to this skin station cell RS interference with respect to eICIC
2.67dB。
The RS power test bandwidth that UE is arranged in this case is 5MHz, if when the RS test bandwidth biggers of UE, SINR will be obtained more
Big to be promoted, computational methods are the same as (5.2).
It can be seen that the method for the reduction heterogeneous network inter-cell interference that above-described embodiment provides, it can be to existing communication
On the basis of protocol change is minimum, reduces LTE and use the macro station ABS of eICIC technologies to the macro base in peripheral cell in frequency heterogeneous network
It stands the interference problems of RS signals, following interference can be reduced simultaneously：
1) when being interfered there are the conflict of mould 3, this cell macro station RS signals will be to the dry of the RS signals of this cell LPN nodes
It disturbs；
2) adjacent cell PDSCH is interfered by this cell CRS；
3) adjacent cell PDCCH is interfered by this cell CRS；
4) when being interfered there are the conflict of mould 3, adjacent cell CRS is also interfered by this cell CRS.
Fig. 6 is a kind of structural schematic diagram of the device of reduction heterogeneous network inter-cell interference in one embodiment of the invention, such as
Shown in Fig. 6, described device includes：Identifier record unit 601 and RS adjustment units 602.Wherein：
Identifier record unit 601 is used for for LTE with the Inter-Cell Interference Coordination eICIC for using enhancing in frequency heterogeneous network
Macro base station, record the macro base station be sent to end side almost blank subframe ABS identifier；RS adjustment units 602
For the identifier according to the ABS, the reference signal RS on ABS sent to the macro base station is adjusted so that described
When macro base station sends the ABS only RS signals are sent in continuous N number of RB bandwidth；Wherein, N is more than or equal to 1 and is less than carrier band
The corresponding RB quantity of width.
In the present embodiment, for LTE with the macro base station for using eICIC in frequency heterogeneous network, identifier record unit 601 records
The macro base station is sent to the identifier of the subframe ABS of the almost blank of end side；RS adjustment units 602 are according to the ABS's
Identifier, the reference signal RS on ABS sent to the macro base station are adjusted so that the macro base station sends the ABS
When only send RS signals in continuous N number of RB bandwidth, so reduce the bandwidth that RS is sent in ABS to ensure the measurement of terminal, drop
Low LTE sends LPN and adjacent cell in cell caused by RS signals with using the macro station ABS of eICIC technologies in frequency heterogeneous network
Co-channel interference improves network carrying efficiency.
Specifically, the RS adjustment units 602, are specifically used for：
According to the identifier of the ABS, determine that the macro base station need to be sent to the ABS of the end side；
RS signals on the ABS are adjusted so that only in 6 RB in centre when the macro base station sends the ABS
Bandwidth sends the RS signals, and the ABS, which is reduced to 1.4MHz operating modes, sends cell reference signals CRS.
In an alternate embodiment of the present invention where, described device further includes：Service unit 603, is used for：
On the ABS after being adjusted to RS service is provided for cell-edge terminals.
In an alternate embodiment of the present invention where, described device further includes：Transmission unit is used for：
In the ABS after being adjusted to RS, according to preset transmission configuration physical downlink control channel PDCCH, physics
Broadcast channel PBCH, Physical Downlink Shared Channel PDSCH and Physical Control Format Indicator Channel PCFICH.
In an alternate embodiment of the present invention where, described device further includes：RS transmission units, are used for：
According to the identifier of the ABS, RS is continuously transmitted on all PRB when the macro base station sends the subframe of non-ABS
Signal.
For device embodiments, since it is basically similar to the method embodiment, so fairly simple, the correlation of description
Place illustrates referring to the part of embodiment of the method.
Fig. 7 is a kind of structure diagram of the equipment of reduction heterogeneous network inter-cell interference in one embodiment of the invention.
With reference to Fig. 7, the equipment for reducing heterogeneous network inter-cell interference, including：Processor (processor) 701, storage
Device (memory) 702, communication interface (Communications Interface) 703 and bus 704；Wherein,
The processor 701, memory 702, communication interface 703 complete mutual communication by the bus 704；
The communication interface 703 is between the equipment and the communication equipment of terminal for reducing heterogeneous network inter-cell interference
Information transmission；
The processor 701 is used to call the program instruction in the memory 702, to execute above-mentioned each method embodiment
The method provided, such as including：For LTE with the macro base for the Inter-Cell Interference Coordination eICIC for using enhancing in frequency heterogeneous network
Stand, record the macro base station be sent to end side almost blank subframe ABS identifier；According to the identifier of the ABS,
The reference signal RS on ABS sent to the macro base station is adjusted so that only even when the macro base station sends the ABS
Continuous N number of RB bandwidth sends RS signals；Wherein, N is more than or equal to 1 and is less than the corresponding RB quantity of carrier bandwidths.
One embodiment of the invention discloses a kind of computer program product, and the computer program product is non-temporary including being stored in
Computer program on state computer readable storage medium, the computer program include program instruction, when described program instructs
When being computer-executed, computer is able to carry out the method that above-mentioned each method embodiment is provided, such as including：It is same for LTE
Using the macro base station of the Inter-Cell Interference Coordination eICIC of enhancing in frequency heterogeneous network, records the macro base station and be sent to end side
The almost identifier of the subframe ABS of blank；According to the identifier of the ABS, the reference on ABS sent to the macro base station is believed
Number RS is adjusted so that only sends RS signals in continuous N number of RB bandwidth when the macro base station sends the ABS；Wherein, N
More than or equal to 1 and it is less than the corresponding RB quantity of carrier bandwidths.
One embodiment of the invention discloses a kind of non-transient computer readable storage medium, and the non-transient computer is readable to deposit
Storage media stores computer instruction, and the computer instruction makes the computer execute the side that above-mentioned each method embodiment is provided
Method, such as including：For LTE in frequency heterogeneous network using the macro base station of the Inter-Cell Interference Coordination eICIC of enhancing, described in record
Macro base station is sent to the identifier of the subframe ABS of the almost blank of end side；According to the identifier of the ABS, to the macro base
The reference signal RS to stand on the ABS sent is adjusted so that only in continuous N number of RB when the macro base station sends the ABS
Bandwidth sends RS signals；Wherein, N is more than or equal to 1 and is less than the corresponding RB quantity of carrier bandwidths.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer read/write memory medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes：ROM, RAM, magnetic disc or light
The various media that can store program code such as disk.
The embodiments such as the test equipment of display device described above are only schematical, wherein described as separation
The unit of part description may or may not be physically separated, the component shown as unit can be or
It can not be physical unit, you can be located at a place, or may be distributed over multiple network units.It can be according to reality
Border needs to select some or all of module therein to achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art
In the case where not paying performing creative labour, you can to understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It is realized by the mode of software plus required general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be expressed in the form of software products in other words, should
Computer software product can store in a computer-readable storage medium, such as ROM/RAM, magnetic disc, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these modification or
It replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of method reducing heterogeneous network inter-cell interference, which is characterized in that the method includes：
For LTE with the macro base station for the Inter-Cell Interference Coordination eICIC for using enhancing in frequency heterogeneous network, the macro base station hair is recorded
Give the identifier of the subframe ABS of the almost blank of end side；
According to the identifier of the ABS, the reference signal RS on ABS sent to the macro base station is adjusted so that described
When macro base station sends the ABS only RS signals are sent in continuous N number of RB bandwidth；Wherein, N is more than or equal to 1 and is less than carrier band
The corresponding RB quantity of width.
2. according to the method described in claim 1, it is characterized in that, according to the identifier of the ABS, the macro base station is sent
ABS on reference signal RS be adjusted so that only sent out in continuous N number of RB bandwidth when the macro base station sends the ABS
RS signals are sent, including：
According to the identifier of the ABS, determine that the macro base station need to be sent to the ABS of the end side；
RS signals on the ABS are adjusted so that only in intermediate 6 RB bandwidth when the macro base station sends the ABS
The RS signals are sent, the ABS, which is reduced to 1.4MHz operating modes, sends cell reference signals CRS.
3. according to the method described in claim 1, it is characterized in that, the method further includes：
On the ABS after being adjusted to RS service is provided for cell-edge terminals.
4. method according to any one of claim 1-3, which is characterized in that the method further includes：
In the ABS after being adjusted to RS, physical downlink control channel PDCCH, physics are sent according to preset transmission configuration
Broadcast channel PBCH, Physical Downlink Shared Channel PDSCH and Physical Control Format Indicator Channel PCFICH.
5. method according to any one of claim 1-3, which is characterized in that the method further includes：
According to the identifier of the ABS, RS signals are continuously transmitted when the macro base station sends the subframe of non-ABS on all PRB.
6. a kind of device reducing heterogeneous network inter-cell interference, which is characterized in that described device includes：
Identifier record unit, for the macro base for LTE with the Inter-Cell Interference Coordination eICIC for using enhancing in frequency heterogeneous network
Stand, record the macro base station be sent to end side almost blank subframe ABS identifier；
RS adjustment units, the reference signal RS on ABS for according to the identifier of the ABS, being sent to the macro base station into
Row adjustment so that only send RS signals in continuous N number of RB bandwidth when the macro base station sends the ABS；Wherein, N be more than etc.
In 1 and be less than the corresponding RB quantity of carrier bandwidths.
7. device according to claim 6, which is characterized in that the RS adjustment units are specifically used for：
According to the identifier of the ABS, determine that the macro base station need to be sent to the ABS of the end side；
RS signals on the ABS are adjusted so that only in intermediate 6 RB bandwidth when the macro base station sends the ABS
The RS signals are sent, the ABS, which is reduced to 1.4MHz operating modes, sends cell reference signals CRS.
8. device according to claim 6, which is characterized in that described device further includes：Service unit is used for：
On the ABS after being adjusted to RS service is provided for cell-edge terminals.
9. according to the device described in any one of claim 6-8, which is characterized in that described device further includes：Transmission unit is used
In：
In the ABS after being adjusted to RS, according to preset transmission configuration physical downlink control channel PDCCH, physical broadcast
Channel PBCH, Physical Downlink Shared Channel PDSCH and Physical Control Format Indicator Channel PCFICH.
10. according to the device described in any one of claim 6-8, which is characterized in that described device further includes：RS sends single
Member is used for：
According to the identifier of the ABS, RS signals are continuously transmitted when the macro base station sends the subframe of non-ABS on all PRB.
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| CN104054383A (en) * | 2011-11-09 | 2014-09-17 | 瑞典爱立信有限公司 | Almost-blank subframe configuration detection in heterogeneous networks |
| CN104081854A (en) * | 2012-01-27 | 2014-10-01 | 交互数字专利控股公司 | Managing or improving interference between cells |
| CN104469796A (en) * | 2014-11-26 | 2015-03-25 | 北京邮电大学 | Heterogeneous network time domain interference coordination method and system based on user fairness |
| CN104995863A (en) * | 2013-02-20 | 2015-10-21 | 瑞典爱立信有限公司 | Systems and methods of triggering interference mitigation without resource partitioning |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104054383A (en) * | 2011-11-09 | 2014-09-17 | 瑞典爱立信有限公司 | Almost-blank subframe configuration detection in heterogeneous networks |
| CN104081854A (en) * | 2012-01-27 | 2014-10-01 | 交互数字专利控股公司 | Managing or improving interference between cells |
| CN104995863A (en) * | 2013-02-20 | 2015-10-21 | 瑞典爱立信有限公司 | Systems and methods of triggering interference mitigation without resource partitioning |
| US20160352447A1 (en) * | 2013-02-20 | 2016-12-01 | Telefonaktiebolaget L M Ericsson (Publ) | Systems and methods of triggering interference mitigation without resource partitioning |
| CN104469796A (en) * | 2014-11-26 | 2015-03-25 | 北京邮电大学 | Heterogeneous network time domain interference coordination method and system based on user fairness |
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