CN103428869B - The method of Inter-Cell Interference Coordination, base station and communication system - Google Patents

The method of Inter-Cell Interference Coordination, base station and communication system Download PDF

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Publication number
CN103428869B
CN103428869B CN201210153836.6A CN201210153836A CN103428869B CN 103428869 B CN103428869 B CN 103428869B CN 201210153836 A CN201210153836 A CN 201210153836A CN 103428869 B CN103428869 B CN 103428869B
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community
base station
boundary user
occupation rate
resources occupation
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CN103428869A (en
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汤斌淞
罗海燕
孙彦赞
邓天乐
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201210153836.6A priority Critical patent/CN103428869B/en
Priority to PCT/CN2013/075833 priority patent/WO2013170786A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria

Abstract

A kind of method that the invention discloses Inter-Cell Interference Coordination, including: the resources occupation rate of the boundary user controlling described first community of acquisition, base station of the first community, and it is sent to the control base station of the second community；Described second community is the neighbor cell of described first community, and the resources occupation rate of the boundary user of described first community is used for, by the base station that controls of described second community, the almost empty frame that configurating downlink sends；The base station that controls of described first community receives the almost empty frame information controlling base station configuration of described second community, being dispatched in the subframe of the descending transmission of described first community by the boundary user of described first community, the time-domain position of described subframe is identical with the time-domain position of the almost empty frame of the descending transmission of described second community.The invention also discloses a kind of base station and communication system.The embodiment of the present invention can the almost empty frame of descending transmission of reasonable disposition interfered cell, improve the ability of Inter-Cell Interference Coordination.

Description

The method of Inter-Cell Interference Coordination, base station and communication system
Technical field
The present invention relates to communication technical field, particularly relate to a kind of method of Inter-Cell Interference Coordination, base station and communication system System.
Background technology
In a wireless communication system, base station sends out on the uplink subscriber equipment (User Equipment, UE) Penetrate data and/or control information, and receive data and/or the control information of subscriber equipment on uplink.
As a example by Long Term Evolution (Long Term Evolution, LTE) system, base station is at Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) sends control information to UE, and UE holds on PDCCH by reading The control information carried, knows the information such as paging, system message and scheduling frequency domain resource position.Then UE is according to above-mentioned letter Number is read on the Physical Downlink Shared Channel (Physical Downlink Share Channel, PDSCH) that breath is scheduled to it According to.Especially, base station is at Physical Control Format Indicator Channel (Physical Control Format Indictor Channel, PCFICH) PDCCH is actual takies several OFDM (Orthogonal Frequency in upper instruction Division Multiplexing, OFDM) code element, generally 1 ~ 3；As descending Physical Resource Block (PRB, Physical Resource Block) number less than 10 time, above-mentioned value is 2 ~ 4.Generally speaking, according to PCFICH, UE knows that PDSCH time-frequency provides The time domain original position in source；Simultaneously according to the information of PDCCH carrying, know the frequency domain of its allocated PDSCH running time-frequency resource arrived Position.If UE reads PDCCH failure, then cannot obtain the data of carrying, the therefore performance pair of PDCCH on follow-up PDSCH For community most important.
In Wireless Heterogeneous Networks (Heterogeneous Network, HetNet), with macrocell (Macro cell) and As a example by the scene of frequency spectrum is shared in pico cells (Pico cell is called for short Microcell), due to Pico cell and Macro The transmitting power difference of cell is relatively big, and general 30dBm and 46dBm that be respectively, therefore the UE of Pico cell is when receiving PDCCH PDCCH degraded performance can be caused by the severe jamming from Macro cell.If Pico cell introduces cell range extension (Cell Range Extension, CRE) technology, then the performance of its PDCCH more deteriorates.Therefore, third generation affiliate meter Draw (Third Generation Partnership Project, 3GPP) and introduce the minizone increasing of time domain (time domain) Strong type interference coordination (enhanced Inter-Cell Interference Coordination, eICIC) mechanism, it is intended to logical When crossing that almost empty frame (Almost Blank Subframe, ABS) solves dissimilar community mixed deployment in HetNet network Descending problem of inter-cell interference.Wherein, ABS subframe refers to the transmission of only public guide frequency in this subframe, or only public affairs The transmission being total to pilot tone and the control channel transmitted with low-power (or low activeness mode), above two scheme is called ABS Zero energy scheme and ABS low power schemes.Wherein, for zero energy and low-power are for PDCCH.Interfered cell Self indivedual descending sub frame is configured to ABS subframe by (aggressive cell), reduces victim cell (victim with this Cell) downlink transfer, the particularly interference to down control channel.See Fig. 1, be Wireless Heterogeneous Networks system in prior art Structural representation.The field of frequency spectrum is shared with macrocell Macro, pico cells Pico 1 and pico cells Pico 2 As a example by scape, as in figure 2 it is shown, descending sub frame 1,2 is configured to the ABS of " zero energy ", the industry of protection Pico1 and Pico 2 by Macro Business transmission；Descending sub frame 6,7 is configured to the business transmission of the ABS of " low-power ", protection Pico2 by Macro；Thus solve descending Problem of inter-cell interference.
But ABS mechanism yet suffers from following problem: it needs to be determined that the ABS subframe that Pico cell wants many small number is protected Protecting its business not disturbed by macro base station, because for Macro cell, multi-configuration ABS subframe can cause the wasting of resources.Mesh Front standard is the quantity that the size according to current Pico cell portfolio determines ABS subframe, and the size of Pico portfolio It is to be described by the occupancy of the Resource Block (Resource Block, RB) in ABS subframe.At Pico cell and Macro RB occupancy on mutual ABS between cell, when occupancy height, Macro cell distributes more ABS subframe to Pico cell.But, for Pico cell, its business is divided into center service and edge service.Diagonal line hatches as shown in Figure 1 Region is the CRE region of Pico cell, is merely able to scheduling on ABS at the UE in CRE region.And at Pico cell center, make an uproar Signal noise interference ratio is relatively low, and signal to noise ratio (Signal to Interference plus Noise Ratio, SINR) can expire Foot scheduling requirement, therefore the UE at Pico cell center can dispatch in ABS subframe or in Non-ABS subframe.For thus Standard use the RB occupancy on ABS describe the size of current Pico cell portfolio not accurate enough, it might even be possible to say and be Mistake, because the UE at Pico cell center is the most, scheduling probability on ABS is the highest, the degree of deviation of the ABS amount of needs The highest.Especially in Pico cell power up, Macro cell there is no ABS subframe, and this also makes to be protected by ABS Resource cannot be weighed.
As it has been described above, cell range extends for Pico cell, it is merely able to scheduling at ABS at the UE in CRE region On, thus the ABS of macro base station is very important for Pico cell.When ABS power ascension, it is on ABS time slot The interference of Pico cell business promoted；When ABS power reduces, or even when being reduced to zero energy, then it is right to reduce The interference of the Pico cell business on ABS time slot.In like manner, when the CRE region of Pico cell increases, in order to reduce minizone Interference, its best mode is also to reduce the ABS power of Macro cell further.As it is shown in figure 1, as the CRE of Pico cell When region increases (i.e. diagonal line hatches region increase), then ABS(A line) power need to coordinate to reduce, could preferably meet and subtract The purpose of design of few interference.But, there is no the mechanism of dynamic coordinate ABS after CRE regional change at present.
Summary of the invention
The many aspects of the present invention provide a kind of method of Inter-Cell Interference Coordination, base station and communication system, it is possible to rationally The almost empty frame of the descending transmission of configuration interfered cell, improves the ability of Inter-Cell Interference Coordination.
One aspect of the present invention provides a kind of method of Inter-Cell Interference Coordination, including: the control base of the first community Stand the resources occupation rate of the boundary user obtaining described first community；The control base station of described first community is by described first community The resources occupation rate of boundary user be sent to the control base station of the second community；Described second community is the phase of described first community Adjacent cell, the resources occupation rate of the boundary user of described first community is used for configurating downlink by the control base station of described second community The almost empty frame sent；The base station that controls of described first community receives the almost sky controlling base station configuration of described second community Sub-frame information, described almost empty frame information is for indicating the time domain position of the almost empty frame of the descending transmission of described second community Put；The boundary user of described first community, according to described almost empty frame information, is dispatched by the control base station of described first community In the subframe of the descending transmission of described first community, the descending transmission of the time-domain position of described subframe and described second community Almost the time-domain position of empty frame is identical.
Another aspect of the present invention provides a kind of base station, including: acquiring unit, transmitting element, reception unit and tune Degree unit.Above-mentioned acquiring unit is for obtaining the resources occupation rate of the boundary user of the first community.Above-mentioned transmitting element is used for will The resources occupation rate of the boundary user of described first community is sent to the control base station of the second community；Described second community is described The neighbor cell of the first community, the resources occupation rate of the boundary user of described first community is by the control base station of described second community The almost empty frame sent for configurating downlink.Above-mentioned reception unit is for receiving the control base station configuration of described second community Almost empty frame information；Described almost empty frame information is for indicating the almost empty frame of the descending transmission of described second community Time-domain position.Above-mentioned scheduling unit is for according to described almost empty frame information, dispatching the boundary user of described first community In the subframe of the descending transmission of described first community, the descending transmission of the time-domain position of described subframe and described second community Almost the time-domain position of empty frame is identical.
Another aspect of the present invention provides a kind of method of Inter-Cell Interference Coordination, including: the control of the first community Base station obtains the resources occupation rate of the boundary user of described first community；The control base station of described first community is by described first little The resources occupation rate of the boundary user in district is sent to the control base station of the second community；Described second community is described first community Neighbor cell, the control base station controlling base station and described second community of described first community is different base station, and described the One community and described second community have same carrier wave；The resources occupation rate of the boundary user of described first community is by described second The base station that controls of community is used for the almost empty frame that configurating downlink sends；The control base station of described first community receives described second The interference information controlling base station of community；Described interference information includes almost empty frame information, and described almost empty frame information is used Time-domain position in the almost empty frame of the descending transmission indicating described second community；The control base station of described first community according to Described interference information, controls the switch of described first community.
Another aspect of the present invention provides a kind of base station, including: acquiring unit, transmitting element, reception unit and control Unit processed.Above-mentioned acquiring unit is for obtaining the resources occupation rate of the boundary user of the first community.Above-mentioned transmitting element is used for will The resources occupation rate of the boundary user of described first community is also sent to the control base station of the second community；Described second community is institute Stating the neighbor cell of the first community, the control base station controlling base station and described second community of described first community is different base Stand, and described first community and described second community have same carrier wave；The resource occupation of the boundary user of described first community Rate is used for, by the base station that controls of described second community, the almost empty frame that configurating downlink sends.Above-mentioned reception unit is used for receiving institute Stating the interference information controlling base station of the second community, described interference information includes almost empty frame information；Described almost empty frame Information is for indicating the time-domain position of the almost empty frame of the descending transmission of described second community.Above-mentioned control unit is used for basis Described interference information, controls the switch of described first community.
Another aspect of the present invention provides a kind of communication system, it is characterised in that include the control base of the first community Stand and the control base station of the second community；The control base station of described first community is arbitrary base station as above；Described second little District controls the base station resources occupation rate for the boundary user according to described first community, the almost gap that configurating downlink sends Frame, and send almost empty frame information to the control base station of described first community.
Another aspect of the present invention provides a kind of method of Inter-Cell Interference Coordination, including: the control of the 3rd community Base station receives the interference information that the control base station of the second community issues；Described interference information includes the control base of described second community The resources occupation rate of the boundary user stood according to the first community, the quantity of the almost empty frame of the descending transmission of configuration；Described The control base station of three communities, according to described interference information, controls the switch of described 3rd community；Wherein, described first community, institute Stating the second community and described 3rd community is neighbor cell；Control base station, the control of described second community of described first community The control base station of base station and described 3rd community is different base station, and described first community, described second community and described Three communities have same carrier wave.
Another aspect of the present invention provides a kind of base station, including: receive unit, for receiving described second community Control the interference information that base station issues；Described interference information includes the limit according to the first community, the control base station of described second community The resources occupation rate of boundary user, the quantity of the almost empty frame of the descending transmission of configuration；And control unit, for according to described dry Disturb information, control the switch of the 3rd community；Wherein, described first community, described second community and described 3rd community are adjacent Community；The control base station controlling base station, the control base station of described second community and described 3rd community of described first community is Different base stations, and described first community, described second community and described 3rd community have same carrier wave.
The method of Inter-Cell Interference Coordination, base station and the communication system that the embodiment of the present invention provides, according to the first community The resources occupation rate of boundary user, it is possible to the almost empty frame of the descending transmission of adjacent second community of reasonable disposition, can not only Protect the first Zone not by the second area interference, and for the second community, also do not result in the wasting of resources.This The almost empty frame information Resources allocation of the bright descending transmission according to the second community, dispatches first by the boundary user of the first community Time in the subframe of the descending transmission of community, the time-domain position of scheduled subframe and the almost gap of the descending transmission of the second community The time-domain position of frame is identical, or controls the switch of neighbor cell, it is possible to increase the ability of Inter-Cell Interference Coordination.
Accompanying drawing explanation
Fig. 1 is the structural representation of Wireless Heterogeneous Networks system in prior art；
Fig. 2 is the schematic diagram of the almost empty frame of the medium and small interval interference coordination of prior art；
Fig. 3 is the schematic flow sheet of a kind of method of Inter-Cell Interference Coordination in the embodiment of the present invention；
Fig. 4 is a kind of presence of intercell interference association being transmitted resources occupation rate by X2 interface or S1 interface in the embodiment of the present invention The schematic flow sheet of the method adjusted；
Fig. 5 is a kind of method of Inter-Cell Interference Coordination by OAM transmission resources occupation rate in the embodiment of the present invention Schematic flow sheet；
Fig. 6 is a kind of presence of intercell interference being transmitted CRE configuration information by X2 interface or S1 interface in the embodiment of the present invention The schematic flow sheet of the method coordinated；
Fig. 7 is a kind of method of Inter-Cell Interference Coordination by OAM transmission CRE configuration information in the embodiment of the present invention Schematic flow sheet；
Fig. 8 is the schematic flow sheet of the method for another kind of Inter-Cell Interference Coordination in the embodiment of the present invention；
Fig. 9 is the schematic flow sheet of the method for another kind of Inter-Cell Interference Coordination in the embodiment of the present invention；
Figure 10 is the structural representation of a kind of base station in the embodiment of the present invention；
Figure 11 is the structural representation of the transmitting element of the base station shown in Figure 10；
Figure 12 is the structural representation of a kind of communication system in the embodiment of the present invention；
Figure 13 is the schematic flow sheet of the method for another kind of Inter-Cell Interference Coordination in the embodiment of the present invention；
Figure 14 is the structural representation of another kind of base station in the embodiment of the present invention；
Figure 15 is the structural representation of the control unit of the base station shown in Figure 14；
Figure 16 is the structural representation of another kind of communication system in the embodiment of the present invention；
Figure 17 is the schematic flow sheet of the method for another kind of Inter-Cell Interference Coordination in the embodiment of the present invention；
Figure 18 is the structural representation of another kind of base station in the embodiment of the present invention；
Figure 19 is the structural representation of the control unit of the base station shown in Figure 18；
Figure 20 is the structural representation of another kind of communication system in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise Embodiment, broadly falls into the scope of protection of the invention.
Seeing Fig. 3, the method for the Inter-Cell Interference Coordination that the embodiment of the present invention provides, including herein below.
S30, the base station that controls of the first community obtain the resources occupation rate of boundary user of the first community.
The resources occupation rate of the boundary user of described first community is sent to second by S31, the base station that controls of the first community The control base station of community.Described second community is the neighbor cell of described first community；The boundary user of described first community Resources occupation rate is used for, by the base station that controls of described second community, the almost empty frame that configurating downlink sends.
S32, receive described second community control base station configuration almost empty frame information.Described almost empty frame information For indicating the time-domain position of the almost empty frame of the descending transmission of described second community.Above-mentioned almost empty frame information can refer to Showing in the subframe of descending transmission of the second community, which is almost empty frame, which right and wrong almost empty frame.
S33, according to described almost empty frame information, the boundary user of described first community is dispatched in described first community Descending transmission subframe on.The almost empty frame of the descending transmission of the time-domain position of described subframe and described second community time Position, territory is identical.
In S30, the control base station of described first community obtains the resources occupation rate of the boundary user of the first community, including Herein below.
S311, the base station that controls of the first community receive the measurement report of user equipment to report of described first community, described Measurement report includes the Reference Signal Received Power RSRP of described first communityPMerit is received with the reference signal of described second community Rate RSRPM。
If S312 is RSRPM-Bias≤RSRPP＜ RSRPM, the control base station of the most described first community judges that described user sets For the boundary user being described first community；If RSRPP＜ RSRPM-Bias or RSRPP≥RSRPM, the most described first community Control base station and judge that described subscriber equipment is not the boundary user of described first community.Wherein, Bias is the reference being pre-configured with Signal receives power difference.
The resources occupation rate of boundary user of described first community is added up in S313, the base station that controls of the first community.
Wherein, the subscriber equipment in the first community can be divided into boundary user and central user, and boundary user refers to be positioned at Subscriber equipment in cell range extension (CRE) region of one community, and central user refers to be positioned at the center of the first community The subscriber equipment in territory.The boundary user of the first community is dispatched in low-power ABS subframe, and central user is dispatched at non-ABS Frame, is conducive to reducing interference, therefore makes a distinction the UE in the first community, it is possible to reasonable distribution Radio Resource.
In S313, the resources occupation rate of the boundary user controlling described first community of statistics, base station of described first community Method, including: by the Resource Block quantity of the boundary user of described first community, divided by whole Resource Block of described first community Quantity, it is thus achieved that the resources occupation rate of the boundary user of described first community；Or, by the resource of the boundary user of described first community Number of blocks, divided by the Resource Block quantity of the edge band of described first community, it is thus achieved that the money of the boundary user of described first community Source occupancy.
Wherein, utilizing cell edge frequency band refers to be planned as the Resource Block that priority scheduling uses to boundary user in advance, works as nothing During boundary user, just can be scheduled to central user.
The resources occupation rate of the boundary user of described first community is used under configuration by the control base station of described second community The almost empty frame that row sends, the base station that controls of the most described second community accounts for according to the resource of the boundary user of described first community By rate, the almost empty frame that configurating downlink sends, specifically include: the control base station of described second community is by described first community The resources occupation rate of boundary user compares with the first threshold value, the second threshold value respectively；Described first threshold value is less than institute State the second threshold value.If the resources occupation rate of the boundary user of described first community is less than described first threshold value, the most described the The almost empty frame of the descending transmission of two communities reduces N1Individual, N1≥1；If the resource occupation of the boundary user of described first community Rate is more than described second threshold value, and the almost empty frame of the descending transmission of the most described second community increases N2Individual, N2≥1；If it is described The resources occupation rate of the boundary user of the first community is more than or equal to described first threshold value, and the border of described first community is used The resources occupation rate at family is less than or equal to described second threshold value, does not the most change the almost sky of the descending transmission of described second community The quantity of subframe.
When being embodied as, the first threshold value, the second threshold value, N can be set according to practical situation1And N2Value.
Optionally, the resources occupation rate of the boundary user of described first community is sent by the base station that controls of described first community To the control base station of the second community, including: the base station that controls of described first community sends the control of the second community to by X2 interface Base station processed, or sent to the control base station of the second community by S 1 interface, or pass through Operations,Administration And Maintenance (Operation Administration and Maintenance, OAM) center sends the control base station of the second community to, or Person sends the control base station of the second community to by the interface between base station and base station coordinator (eCordinator).Wherein, base Coordinator of standing can be connected with multiple base stations, it is achieved combined dispatching between each base station, synchronizes and controls the functions such as signaling forwarding.
The method of the Inter-Cell Interference Coordination that the present embodiment provides, according to the almost empty frame of the descending transmission of the second community Information Resources allocation, time in the subframe of the descending transmission that the boundary user of the first community is dispatched the first community, scheduled son The time-domain position of the almost empty frame of the time-domain position of frame and the descending transmission of the second community is identical, it is possible to increase presence of intercell interference The ability coordinated.
On the basis of above-mentioned Fig. 3 embodiment, below in conjunction with Fig. 4 and Fig. 5, to the transmission of resources occupation rate and almost gap The configuration flow of frame is described in detail.
See Fig. 4, transmit resources occupation rate by X2 interface or S1 interface and ABS configuration flow includes herein below.
The control base station of S401, subscriber equipment and the first community carries out business transmission.
S402, the first community control base station obtain boundary user resources occupation rate after, by the control of the first community The X2 interface controlled between base station of base station processed and the second community or by S1 interface, by the resource of the boundary user of the first community Occupancy is delivered to the control base station of the second community.
After the resources occupation rate of the boundary user that S403, the control base station of the second community receive the first community, according to described The almost empty frame that the resources occupation rate configurating downlink of the boundary user of the first community sends；And by the control base of the first community Stand and the X2 interface controlled between base station of the second community or by S1 interface, almost empty frame information will pass to the first community Control base station.
See Fig. 5, include herein below by OAM transmission resources occupation rate and ABS configuration flow.
The control base station of S501, subscriber equipment and the first community carries out business transmission.
S502, the first community control base station obtain described first community boundary user resources occupation rate after, will The resources occupation rate of the boundary user of described first community is delivered to OAM.
The resources occupation rate of the boundary user of the first community is delivered to the control base station of the second community by S503, OAM.
After the resources occupation rate of the boundary user that S504, the control base station of the second community receive the first community, according to described The almost empty frame that the resources occupation rate configurating downlink of the boundary user of the first community sends；And by the control base of the first community Stand and the X2 interface controlled between base station of the second community or by S1 interface, almost empty frame information will pass to the first community Control base station.
Additionally, the control base station of the first community is after obtaining the resources occupation rate of boundary user of described first community, also Can be by the interface controlled between base station and base station coordinator of the first community, by the money of the boundary user of described first community Source occupancy passes to base station coordinator, then by the base station coordinator control base station by described base station coordinator and the second community Between interface, the resources occupation rate of the boundary user of described first community is passed to the control base station of the second community.Second After the resources occupation rate controlling the boundary user that base station receives described first community of community, according to the border of described first community The almost empty frame that the resources occupation rate configurating downlink of user sends, and pass through control base station and the base station coordinator of the second community Between interface, almost empty frame information will pass to base station coordinator, then by base station coordinator by described base station coordinator And first interface controlled between base station of community, described almost empty frame information is passed to the control base station of the first community.
The method of the Inter-Cell Interference Coordination that the present embodiment provides, according to the resource occupation of the boundary user of the first community Rate, the ABS subframe of the descending transmission of the second community that reasonable disposition is adjacent；The boundary user of the first community is dispatched the first community Descending transmission subframe on time, the almost empty frame of the time-domain position of scheduled subframe and the descending transmission of the second community Time-domain position is identical, can not only protect the first Zone not by the second area interference, and for the second community, also Do not result in the wasting of resources.
In one embodiment, the method for the Inter-Cell Interference Coordination that the present embodiment provides, it is possible in the first community When controlling base station start, according to the resources occupation rate of the boundary user of the first community, configure descending transmission several of the second community Empty frame, specific as follows: when starting shooting in the control base station of the first community, the second community is not provided with any ABS.Therefore, according to Current protocol cannot weigh the load(flow in ABS), after the first cell configuration CRE, CRE region starts to be interfered.At this Under scene, the method performing the Inter-Cell Interference Coordination that above-described embodiment provides, determine the boundary user in the first community, according to The resources occupation rate of the boundary user in the first community coordinates the ABS sub-frame number required for the first community, protects the first community Business is not by the second area interference.And, the control base station of the second community is according to the resource occupation of the boundary user of the first community The ABS sub-frame number of the descending transmission of rate reasonable disposition, for the second community, does not results in the wasting of resources yet.
In another embodiment, the method for the Inter-Cell Interference Coordination that the embodiment of the present invention provides, by joining CRE Put and be monitored, it is possible to the almost empty frame of the descending transmission of dynamic coordinate the second community after CRE regional change.
Additionally, the method for the Inter-Cell Interference Coordination of the present embodiment offer, before above-mentioned S30, may further comprise: When first community carries out cell range extension, sending cell range expanded configuration information to the control base station of the second community (can letter It is referred to as " CRE configuration information ")；Described cell range expanded configuration information includes that cell range extends bias (CRE bias Value), and enable the time of described cell range extension bias；Described cell range expanded configuration information is used for notifying described The control base station change cell range expanded configuration of the second community；Receive described second community controls the community model that base station returns Enclose extended response information.
Wherein, the time enabling CRE bias value can be absolute time, or relative time.
Absolute time includes: clock time；When first community and the second community agreement arrive this clock time point, enable little CRE configuration after district's range expansion.
Relative time includes: certain subframe numbers；The subframe sent when the first community and the second cell downlink arrives described son During frame number, begin to use the CRE bias value after cell range extension.
Relative time also includes: be positioned at after receiving CRE configuration information, and before returning CRE configuration response information N-th subframe numbers.The second community is arranged after receiving CRE configuration information in i.e. first community, and interval n-th subframe both sides just open Begin jointly to enable the CRE bias value after cell range extension.Wherein, relative time (such as n-th subframe numbers) is except can be by The control base station of the first community is carried when sending CRE configuration information, it is also possible to sent CRE by the control base station of the second community Carry during configuration response information.
If it should be noted that the base station that controls of the first community does not receives the CRE controlling base station return of the second community Configuration response information, then the control base station of the first community sends CRE configuration information by repeating.
In one embodiment, the first changing cells, community range expansion configuration can be the control in described first community The extension of step-by-step movement CRE is carried out during the start of base station processed, specific as follows:
When starting shooting in the control base station of the first community, step-by-step movement starts CRE extension.Such as, CRE from the beginning of 0dB, with 0.5dB is extension step-length, with 0.5 hour as extended interval, attempts extension CRE region.CRE extension stops in situations where:
1) the first whole cell business volume in community reaches a certain threshold value；Such as RB occupancy reaches 85%, illustrates to reach to inhale Receive abundant UE business network planning design, reached operator and placed the purpose of the first community；
2), in the CRE expanding course of the first community, PDCCH Block Error Rate (Block Error Ratio, BLER) is higher than a certain Thresholding, such as, higher than 0.1%, illustrate that the region that CRE extends is interfered sufficiently large, is no longer appropriate for CRE and expands；
3) CRE expands and has reached the first community and can set the upper limit of CRE value.
During CRE configuration is expanded in the first community, each step CRE changes, and the control base station of the first community is all passed through X2 interface, or by S1 interface, or by OAM, or in time will by the interface between base station and base station coordinator CRE configuration information sends the control base station of the second community to.
The conveying flow configured CRE below in conjunction with Fig. 6 and Fig. 7 is described in detail.
As shown in Figure 6, the control base station of subscriber equipment and the first community carries out business transmission.The control base station of the first community X2 interface or the method for S1 interface transmission CRE configuration information is passed through, including herein below with the base station that controls of the second community.
S601, when the first changing cells, community range expansion configuration, by the control base station of the first community, little by first District controls base station and the X2 interface controlled between base station of the second community or by S 1 interface, is delivered to by CRE configuration information The control base station of the second community.
After S602, the control base station of the second community receive CRE configuration information, changing cells range expansion configures, and passes through The X2 interface controlled between base station controlling base station and the second community of the first community or by S1 interface, to the control of the first community Base station processed returns CRE configuration response information.
As it is shown in fig. 7, the control base station of subscriber equipment and the first community carries out business transmission.The control base station of the first community With the second community control base station by OAM transmission CRE configuration information include herein below.
S701, when the first changing cells, community range expansion configuration, the control base station of the first community is by CRE configuration information It is delivered to OAM.
CRE configuration information is delivered to the control base station of the second community by S702, OAM.
After S703, the control base station of the second community receive CRE configuration information, changing cells range expansion configures, and to OAM Return CRE configuration response information.
S704, OAM return CRE configuration response information to the control base station of the first community.
Additionally, the present embodiment can also be by the interface transmission CRE configuration information between base station coordinator and base station, it passes Pass flow process and the resource occupation of the above-mentioned boundary user being transmitted the first community by the interface between base station coordinator and base station The flow process of rate is identical, is not described here in detail.
In another embodiment, the first changing cells, community range expansion configuration can be to reconfigure CRE, example As: operator, due to the reason such as the network optimization or failture evacuation, needs to reconfigure the CRE of the first community, including CRE bias The increasing or decreasing of value, or configure a new CRE bias value by OAM.During implementing, such as, when first When Zone is excessive (such as RB occupancy for a long time more than 95% or interference substantially, or PDCCH BLER is higher than threshold value 0.2% Etc.), need the first community to reduce CRE bias value.Wherein, the process of CRE and the above-mentioned control base in the first community are configured Stand start time to carry out the process of step-by-step movement CRE extension identical, no longer describe in detail at this.
In above-described embodiment, carry out the extension of step-by-step movement CRE when starting shooting in the control base station of the first community or reconfigure CRE, can cause the change in CRE region.And CRE region becomes big or diminishes the scope of MPS process can be caused to change, will Cause the change in fact accessing the UE quantity of community, thus bring the change of the first cell edge flow.In marginal flow quantitative change After change, the edge service of the first community can only be carried out on ABS, under this scene, by performing the little of above-described embodiment offer The method of interval interference coordination, coordinates required for the first community according to the resources occupation rate of the boundary user in the first community ABS sub-frame number, it is possible to meet the demand of the data transmission of the boundary user of the first community.
In embodiments of the present invention, when CRE size changes, X2 interface, S1 interface or OAM dynamic coordinate can be passed through ABS.It is described in detail below in conjunction with Fig. 8 and Fig. 9.
Seeing Fig. 8, the present embodiment provides the method for another kind of Inter-Cell Interference Coordination.Subscriber equipment and the control of the first community Base station processed carries out business transmission, and when CRE size changes, the present embodiment is by X2 interface or by S1 interface dynamic coordinate ABS, specifically includes herein below.
S801, when the first changing cells, community range expansion configuration, by the control base station of the first community, little by first District controls base station and the X2 interface controlled between base station of the second community or by S1 interface, is delivered to by CRE configuration information The control base station of the second community.Described first community and the second community are neighbor cells.
After S802, the control base station of the second community receive CRE configuration information, changing cells range expansion configures, and passes through The X2 interface controlled between base station controlling base station and the second community of the first community or by S1 interface, to the control of the first community Base station processed returns CRE configuration response information.
S803, the base station that controls of the first community redefine the boundary user of the first community, add up the border of the first community The resources occupation rate of user, controlling base station and the X2 interface controlled between base station of the second community or passing through by the first community S1 interface, is delivered to the control base station of the second community by the resources occupation rate of the boundary user of the first community.
After the resources occupation rate of the boundary user that S804, the control base station of the second community receive the first community, according to described The almost empty frame that the resources occupation rate configurating downlink of the boundary user of the first community sends；And by the control base of the first community Stand and the X2 interface controlled between base station of the second community or by S1 interface, almost empty frame information will pass to the first community Control base station.
Described almost empty frame information is for indicating the time domain position of the almost empty frame of the descending transmission of described second community Put.Above-mentioned almost empty frame information can indicate that in the subframe of descending transmission of the second community, and which is almost empty frame, which Right and wrong almost empty frame.
S805, the control base station of the first community receive almost after empty frame information, according to described almost empty frame information The boundary user of the first community is dispatched in the subframe of the descending transmission of described first community, the time-domain position of described subframe with The time-domain position of the almost empty frame of the descending transmission of described second community is identical.
Seeing Fig. 9, the present embodiment provides the method for another kind of Inter-Cell Interference Coordination.Subscriber equipment and the control of the first community Base station processed carries out business transmission, when CRE size changes, the present embodiment pass through OAM dynamic coordinate ABS, specifically include with Lower content.
S901, when the first changing cells, community range expansion configuration, the control base station of the first community is by CRE configuration information It is delivered to OAM.
CRE configuration information is delivered to the control base station of the second community by S902, OAM.Described first community and the second community It it is neighbor cell.
After S903, the control base station of the second community receive CRE configuration information, changing cells range expansion configures, and to OAM Return CRE configuration response information.
S904, OAM return CRE configuration response information to the control base station of the first community.
S905, the base station that controls of the first community redefine the boundary user of the first community, add up the border of the first community The resources occupation rate of user, is delivered to OAM by the resources occupation rate of the boundary user of the first community.
The resources occupation rate of the boundary user of the first community is delivered to the control base station of the second community by S906, OAM.
After the resources occupation rate of the boundary user that S907, the control base station of the second community receive the first community, according to described The almost empty frame that the resources occupation rate configurating downlink of the boundary user of the first community sends；And by the control base of the first community Stand and the X2 interface controlled between base station of the second community or by S1 interface, almost empty frame information will pass to the first community Control base station.
Described almost empty frame information is for indicating the time domain position of the almost empty frame of the descending transmission of described second community Put.Above-mentioned almost empty frame information can indicate that in the subframe of descending transmission of the second community, and which is almost empty frame, which Right and wrong almost empty frame.
S908, the control base station of the first community receive almost after empty frame information, according to described almost empty frame information The boundary user of the first community is dispatched in the subframe of the descending transmission of described first community, the time-domain position of described subframe with The time-domain position of the almost empty frame of the descending transmission of described second community is identical.
Additionally, the present embodiment can also transmit the border use of the first community by the interface between base station coordinator and base station The resources occupation rate at family, almost empty frame information and CRE configuration information.
The embodiment of the present invention also provides for base station as described in Figure 10 and communication system as described in Figure 12, it is possible to realize above-mentioned The flow process of method of Inter-Cell Interference Coordination.
Seeing Figure 10, the present embodiment provides a kind of base station, including: acquiring unit 100, transmitting element 101, receive unit 102 and scheduling unit 103.
Above-mentioned acquiring unit 100 is for obtaining the resources occupation rate of the boundary user of the first community.
Above-mentioned transmitting element 101 is for being sent to the second community by the resources occupation rate of the boundary user of described first community Control base station.Described second community is the neighbor cell of described first community；The resource of the boundary user of described first community Occupancy is used for, by the base station that controls of described second community, the almost empty frame that configurating downlink sends.
Above-mentioned reception unit 102 is for receiving the almost empty frame information controlling base station configuration of described second community；Institute State almost empty frame information for indicating the time-domain position of the almost empty frame of the descending transmission of described second community.
Above-mentioned scheduling unit 103 is for according to described almost empty frame information, adjusting the boundary user of described first community Spend in the subframe of the descending transmission of described first community, the time-domain position of described subframe and the descending transmission of described second community The time-domain position of almost empty frame identical.
As shown in figure 11, described acquiring unit 100 specifically includes: receives subelement 1011, determine subelement 1012 and place Reason subelement 1013.
Above-mentioned reception subelement 1011 is for receiving the measurement report of the user equipment to report of described first community, described survey Amount report includes the Reference Signal Received Power RSRP of described first communityPReference Signal Received Power with described second community RSRPM。
Above-mentioned determine subelement 1012 for: if RSRPM-Bias≤RSRPP＜ RSRPM, then judge that described subscriber equipment is The boundary user of described first community；If RSRPP＜ RSRPMBias or RSRPP≥RSRPM, then described subscriber equipment is judged not It it is the boundary user of described first community；Wherein, Bias is the Reference Signal Received Power difference being pre-configured with.
Above-mentioned process subelement 1013 is for adding up the resources occupation rate of the boundary user of described first community.
Alternatively, described process subelement 1013 can be further used for: by the resource of the boundary user of described first community Number of blocks, divided by whole Resource Block quantity of described first community, it is thus achieved that the resource occupation of the boundary user of described first community Rate；Or the Resource Block quantity of the boundary user by described first community, divided by the Resource Block of the edge band of described first community Quantity, it is thus achieved that the resources occupation rate of the boundary user of described first community.
Described transmitting element 101 is additionally operable to: when carrying out cell range extension in described first community, to described second community Control base station send cell range expanded configuration information；Described cell range expanded configuration information includes cell range extension partially Put value, and enable the time of described cell range extension bias；Described cell range expanded configuration information is used for notifying institute State the control base station change cell range expanded configuration of the second community；
Described reception subelement 1011 is additionally operable to: receive described second community controls the cell range extension that base station returns Response message.
The base station that the present embodiment provides, according to the almost empty frame information Resources allocation of the descending transmission of the second community, will Time in the subframe of the descending transmission that the boundary user of the first community dispatches the first community, the time-domain position of scheduled subframe and The time-domain position of the almost empty frame of the descending transmission of two communities is identical, it is possible to increase the ability of Inter-Cell Interference Coordination.
Seeing Figure 12, the present embodiment provides a kind of communication system, including control base station 121 and second community of the first community Control base station 122.
The base station 121 that controls of described first community is the base station described in above-mentioned Figure 10 and Figure 11；The control of described second community Base station processed 122 for the resources occupation rate of the boundary user according to described first community, the almost empty frame that configurating downlink sends, And send almost empty frame information to the control base station of described first community.
The control base station 122 of described second community specifically includes: comparing unit 1221 and dispensing unit 1222.Wherein, on State comparing unit 1221 for by the resources occupation rate of the boundary user of described first community respectively with the first threshold value, second Limit value compares；Described first threshold value is less than described second threshold value.Above-mentioned dispensing unit 1222 is used for: if described first The resources occupation rate of the boundary user of community is less than described first threshold value, the almost sky of the descending transmission of the most described second community Subframe reduces N1Individual, N1≥1；If the resources occupation rate of the boundary user of described first community is more than described second threshold value, then institute The almost empty frame of the descending transmission stating the second community increases N2Individual, N2≥1；If the resource of the boundary user of described first community Occupancy is more than or equal to described first threshold value, and the resources occupation rate of the boundary user of described first community is less than or equal to Described second threshold value, does not the most change the quantity of the almost empty frame of the descending transmission of described second community.
Optionally, the control base station of described first community is further used for by X2 interface, or by S1 interface, or By Operations,Administration And Maintenance center OAM, or by the interface between base station and base station coordinator, by described first community The resources occupation rate of boundary user sends the control base station of described second community to.The control base station of described second community is further For by X2 interface, or by S1 interface, or by OAM, or by the interface between base station and base station coordinator, Described almost empty frame information is sent to the control base station of described first community.
The communication system that the present embodiment provides, according to the resources occupation rate of the boundary user of the first community, it is possible to Reasonable Put the almost empty frame of the descending transmission of adjacent second community, the first Zone can not only be protected not done by the second community Disturb, and for the second community, also do not result in the wasting of resources.Meanwhile, according to the descending transmission of the second community almost Empty frame information Resources allocation, time in the subframe of the descending transmission that the boundary user of the first community is dispatched the first community, is adjusted The time-domain position of the almost empty frame of the time-domain position of the subframe of degree and the descending transmission of the second community is identical, it is possible to increase community Between the ability of interference coordination.
Seeing Figure 13, the present embodiment provides the method for another kind of Inter-Cell Interference Coordination, including herein below.
S130, the base station that controls of the first community obtain the resources occupation rate of boundary user of described first community.
The resources occupation rate of the boundary user of described first community is sent to by S131, the base station that controls of described first community The control base station of the second community.Described second community is the neighbor cell of described first community, the control base of described first community Stand and the control base station of the second community is different base station, and described first community and described second community have same carrier wave； The resources occupation rate of the boundary user of described first community is used for what configurating downlink sent by the base station that controls of described second community Almost empty frame.
S132, the base station that controls of described first community receive the interference information controlling base station of described second community.Described Interference information includes almost empty frame information；Described almost empty frame information is for indicating the descending transmission of described second community The almost time-domain position of empty frame.
S133, described first community control base station according to described interference information, control the switch of described first community.
In S130 and S131, the method that determines the boundary user of the first community, the boundary user of adding up the first community The method of resources occupation rate, the transmission method of resources occupation rate, the almost sky controlling base station configurating downlink transmission of the second community When the method for subframe and cell range extension, the method for dynamic coordinate ABS, identical with the embodiment described in above-mentioned Fig. 3 ~ Fig. 9, It will not go into details for this.
In S132, the control base station of described first community, according to described interference information, controls opening of described first community Close, including: described interference information is compared, according to comparing knot by the base station that controls of described first community with preset threshold value Fruit judges whether to need to close described first community；If desired described first community is closed, then by the use in described first community Family equipment is switched to the 3rd community, and closes described first community；If need not close described first community, then by described first The boundary user of community is switched to described 3rd community, does not close described first community.
Wherein, the control base station controlling base station and described 3rd community of described first community is identical base station, and institute State the first community and described 3rd community and there is different carrier.
Wherein, the first community and the 3rd community are the community of two different carriers in same control base station, i.e. this base station Employing carrier aggregation (carrier aggregation, the CA) community of multiple carrier wave, base station can be with selectively unlocking or closedown A certain community, or switching dredges the UE community from the community of a carrier wave to another carrier wave, in order to coordinate minizone Interference.
First community and the second community are the communities with same carrier wave in two different base stations, the control of the second community The ABS quantity of the descending transmission of base station is the most, illustrates that the resources occupation rate that the first community is dispatched on CRE is the highest, namely CRE On portfolio the biggest, or the UE in CRE region is the most, and this illustrates that the interference suffered by the first community is the most serious.At this In embodiment, base station can select carrier wave according to the ABS quantity in ABS information, such as, when ABS quantity is 1, interference is described Exist but the most serious, it is possible to use this first community.When ABS quantity is more than a certain thresholding (such as threshold value is 2), illustrate dry Disturb serious, need to close the first community, use other community, or the UE of the first community is switched on other communities.
In an optional embodiment, X2 interface is passed through in the control base station of the second community, or by S1 interface, or Person passes through OAM, or by the interface between base station and base station coordinator, described interference information sends the control of the first community to Base station processed.Described interference information can also include high interference instruction (High Interference Indicator, HII), overload Instruction (Overload Indicator, OI), Relative Narrowband TX Power (Relative NarrowbandTX Power Indicator, RNTP), Block Error Rate (Block Error Rate, BLER), channel quality instruction (Channel Quality Indicator, CQI) at least one.Judge whether that the method needing to close community is: by each item in interference information Data compare with corresponding threshold value；If each item data is all higher than the threshold value of correspondence, then show the first area interference Seriously, need to close the first community；Otherwise need not close community.
The method of the Inter-Cell Interference Coordination that the present embodiment provides, according to the almost empty frame of the descending transmission of the second community Information Resources allocation, controls the switch of neighbor cell, it is possible to increase the ability of Inter-Cell Interference Coordination.
The embodiment of the present invention also provides for base station as shown in figure 14 and communication system as shown in figure 16, it is possible to realize above-mentioned The flow process of the method for the Inter-Cell Interference Coordination described in Figure 13.
See Figure 14, the base station that the present embodiment provides, including: acquiring unit 140, transmitting element 141, receive unit 142 With control unit 143.
Above-mentioned acquiring unit 140, for obtaining the resources occupation rate of the boundary user of the first community.
Above-mentioned transmitting element 141 for being sent to the control of the second community by the resources occupation rate of the boundary user of the first community Base station processed.Described second community is the neighbor cell of described first community, the control base station of described first community and the second community Control base station be different base stations, and described first community and described second community have same carrier wave；Described first community Boundary user resources occupation rate by described second community control base station for configurating downlink send almost empty frame.
Above-mentioned reception unit 142 is for receiving the interference information controlling base station of described second community, described interference information Including almost empty frame information.Described almost empty frame information is for indicating the almost gap of the descending transmission of described second community The time-domain position of frame.
Above-mentioned control unit 143, for according to described interference information, controls the switch of described first community.
Wherein, the acquiring unit 100 of acquiring unit 140 and transmitting element 141 and above-mentioned Figure 10 Yu Figure 11 and transmitting element The 26S Proteasome Structure and Function of 101 is identical, does not repeats them here.
As shown in figure 15, described control unit 143 specifically includes: judgment sub-unit 1431 and coordination subelement 1432.
Above-mentioned judgment sub-unit 1431 is for comparing described interference information with preset threshold value, according to comparing knot Fruit judges whether to need to close described first community.Above-mentioned coordination subelement 1432 is used for: if desired close described first community, Then the subscriber equipment in described first community is switched to the 3rd community, and closes described first community；If need not close institute State the first community, then the boundary user of described first community is switched to described 3rd community, do not close described first community.
Wherein, the control base station controlling base station and described 3rd community of described first community is identical base station, and institute State the first community and described 3rd community and there is different carrier.Described interference information also includes in HII, OI, RNTP, BLER, CQI At least one.
Alternatively, the resources occupation rate of the boundary user of described first community, is to send described second to by X2 interface The control base station of community, or sent to the control base station of described second community by S1 interface, or send institute to by OAM State the control base station of the second community, or sent to the control of described second community by the interface between base station and base station coordinator Base station processed.
The base station of the Inter-Cell Interference Coordination that the present embodiment provides, according to the almost empty frame of the descending transmission of the second community Information Resources allocation, controls the switch of neighbor cell, it is possible to increase the ability of Inter-Cell Interference Coordination.
Seeing Figure 16, a kind of communication system that the present embodiment provides, the control base station 161 and second including the first community is little The control base station 162 in district.
The base station 161 that controls of described first community is the base station described in above-mentioned Figure 14 and Figure 15.The control of described second community Base station 162 processed, for the resources occupation rate of the boundary user according to described first community, the almost gap that configurating downlink sends Frame, and send almost empty frame information to the control base station of described first community.
The control base station 162 of described second community specifically includes: comparing unit 1621 and dispensing unit 1622.Wherein, on State comparing unit 1621 for: by the resources occupation rate of the boundary user of described first community respectively with the first threshold value, second Threshold value compares；Described first threshold value is less than described second threshold value.Above-mentioned dispensing unit 1622, if for described the The resources occupation rate of the boundary user of one community is less than described first threshold value, and the descending transmission of the most described second community is almost Empty frame reduces N1Individual, N1≥1；If the resources occupation rate of the boundary user of described first community is more than described second threshold value, then The almost empty frame of the descending transmission of described second community increases N2Individual, N2≥1；If the money of the boundary user of described first community Source occupancy be more than or equal to described first threshold value, and the resources occupation rate of the boundary user of described first community less than or etc. In described second threshold value, the most do not change the quantity of the almost empty frame of the descending transmission of described second community.
Optionally, X2 interface can be passed through in the control base station of described first community, or by S1 interface, or pass through OAM, or by the interface between base station and base station coordinator, the resources occupation rate of the boundary user of described first community is passed Give the control base station of described second community；X2 interface can be passed through in the control base station of described second community, or is connect by S1 Mouthful, or by OAM, or by the interface between base station and base station coordinator to, described interference information is sent described the The control base station of one community.
The communication system that the present embodiment provides, according to the resources occupation rate of the boundary user of the first community, it is possible to Reasonable Put the almost empty frame of the descending transmission of adjacent second community, the first Zone can not only be protected not done by the second community Disturb, and for the second community, also do not result in the wasting of resources.Meanwhile, according to the descending transmission of the second community almost Empty frame information Resources allocation, controls the switch of neighbor cell, it is possible to increase the ability of Inter-Cell Interference Coordination.
Seeing Figure 17, the present embodiment provides the method for another kind of Inter-Cell Interference Coordination, including herein below.
S171, the base station that controls of the 3rd community receive the interference information that the control base station of the second community issues；Described interference Information includes the control base station resources occupation rate according to the boundary user of the first community of described second community, descending of configuration The quantity of the almost empty frame sent.
S172, described 3rd community control base station according to described interference information, control the switch of described 3rd community.
Wherein, described first community, described second community and described 3rd community are neighbor cells；Described first community Control base station, the control base station controlling base station and described 3rd community of described second community is different base station, and described the One community, described second community and described 3rd community have same carrier wave.
It should be noted that how this enforcement determines the method for the boundary user of the first community, adds up the first community The method of the resources occupation rate of boundary user, the transmission method of resources occupation rate, the control base station configurating downlink of the second community are sent out The method of dynamic coordinate ABS when the method for the almost empty frame sent and cell range extension, with the enforcement described in above-mentioned Fig. 3 ~ Fig. 9 Example is identical, does not repeats them here.
In S172, the control base station of described 3rd community, according to described interference information, controls opening of described 3rd community Close, including: described interference information is compared, according to comparing knot by the base station that controls of described 3rd community with preset threshold value Fruit judges whether to need to close described 3rd community.If desired close described 3rd community, then close described 3rd community, and open Open the 4th community；If need not close described 3rd community, the most do not close described 3rd community, and be not turned on described 4th little District.Wherein, the control base station controlling base station and the 4th community of the 3rd community is identical base station, and described 3rd community and institute State the 4th community and there is different carrier.The control base station of the 3rd community and the 4th community employs CA community, and base station can select Property be turned on and off a certain community, or the UE community from the community of a carrier wave to another carrier wave is dredged in switching, in order to Coordinate the interference of minizone.
First community, the second community and the 3rd community are the communities with same carrier wave in three different base stations, second The ABS quantity of the descending transmission controlling base station of community is the most, illustrates that the resources occupation rate dispatched on CRE the first community is got over Height, namely the portfolio on CRE is the biggest, or the UE in CRE region is the most, and this illustrates the interference suffered by the first community The most serious.Such as, when ABS quantity is more than 2, serious interference is described, then adjacent base station is closed and is had identical load with the first community 3rd community of wave frequency, and open the 4th community of another carrier wave.
In an optional embodiment, X2 interface is passed through in the control base station of the second community, or by S1 interface, or Person passes through OAM, or by the interface between base station and base station coordinator, described interference information sends the control of the 3rd community to Base station processed.Described interference information can also include at least one in HII, OI, RNTP, BLER, CQI.Judge whether to need to close The method closing the 3rd community is: compared with corresponding threshold value by each item data in interference information；If each item number According to being all higher than corresponding threshold value, then show that the first area interference is serious, need to close the 3rd community；Otherwise need not close Three communities.
Further, serious interference is worked as, it is determined that when needing to close three communities, if there is UE the 3rd community, then first Open the 4th community, after the UE in the 3rd community is switched to the 4th community, turn off the 3rd community.If the 3rd community does not has Have UE(such as when starting shooting in the control base station of the 3rd community, the 3rd community do not have UE), then directly close the 3rd community, and Open the 4th community.
The method of the Inter-Cell Interference Coordination that the present embodiment provides, by doing that the control base station of reception neighbor cell issues Disturb information, and according to described interference information, control the switch of neighbor cell, it is possible to increase the ability of Inter-Cell Interference Coordination.
The embodiment of the present invention also provides for base station as shown in figure 18 and communication system as shown in figure 20, it is possible to realize Figure 17 The flow process of the method for described Inter-Cell Interference Coordination.
See Figure 18, the base station that the present embodiment provides, including: receive unit 181 and control unit 182.
The interference information that above-mentioned reception unit 181 issues for the control base station receiving described second community；Described interference Information includes the control base station resources occupation rate according to the boundary user of the first community of described second community, descending of configuration The quantity of the almost empty frame sent.Above-mentioned control unit 182 is for according to described interference information, controlling the switch of the 3rd community.
Wherein, described first community, described second community and described 3rd community are neighbor cells；Described first community Control base station, the control base station controlling base station and described 3rd community of described second community is different base station, and described the One community, described second community and described 3rd community have same carrier wave.
As shown in figure 19, described control unit 182 specifically includes: judgment sub-unit 1821 and coordination subelement 1822.
Above-mentioned judgment sub-unit 1821 is for comparing described interference information with preset threshold value, according to comparing knot Fruit judges whether to need to close described 3rd community；Above-mentioned coordination subelement 1822 is used for: if desired close described 3rd community, Then close described 3rd community, and open the 4th community；If need not close described 3rd community, the most do not close described 3rd little District, and it is not turned on described 4th community.
Wherein, the control base station controlling base station and described 4th community of described 3rd community is identical base station, and institute State the 3rd community and described 4th community and there is different carrier.Described interference information also includes in HII, OI, RNTP, BLER, CQI At least one.
The base station that the present embodiment provides, by receiving the interference information that the control base station of neighbor cell issues, and according to institute State interference information, control the switch of neighbor cell, it is possible to increase the ability of Inter-Cell Interference Coordination.
Seeing Figure 20, the communication system that the embodiment of the present invention provides, the control base station 201, second including the first community is little District controls base station 202 and the control base station 203 of the 3rd community.
The base station 203 that controls of described 3rd community is the base station described in Figure 18 and Figure 19；The control base of described second community Stand 202 for the resources occupation rate according to the boundary user of described first community, the almost empty frame that configurating downlink sends.
Optionally, the control base station 201 of the first community is by X2 interface, or passes through S1 interface, or by OAM, will The resources occupation rate of the boundary user of the first community sends the control base station 202 of the second community to；The control base station of the second community 202 pass through X2 interface, or by S1 interface, or by OAM, by interference information or almost empty frame information send the 3rd to The control base station 203 of community.
The communication system that the present embodiment provides, the interference information issued by the control base station of reception neighbor cell, base station, And according to described interference information, control the switch of neighbor cell, it is possible to increase the ability of Inter-Cell Interference Coordination.
The method of Inter-Cell Interference Coordination, base station and the communication system that the embodiment of the present invention provides, according to the first community The resources occupation rate of boundary user, it is possible to the almost empty frame of the descending transmission of adjacent second community of reasonable disposition, can not only Protect the first Zone not by the second area interference, and for the second community, also do not result in the wasting of resources.This The almost empty frame information Resources allocation of the bright descending transmission according to the second community, dispatches first by the boundary user of the first community Time in the subframe of the descending transmission of community, the time-domain position of scheduled subframe and the almost gap of the descending transmission of the second community The time-domain position of frame is identical, or controls the switch of neighbor cell, it is possible to increase the ability of Inter-Cell Interference Coordination.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, be permissible Instructing relevant hardware by computer program to complete, described program can be stored in a computer read/write memory medium In, this program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic Dish, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc..
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also considered as Protection scope of the present invention.

Claims (15)

1. the method for an Inter-Cell Interference Coordination, it is characterised in that including:
The resources occupation rate of the boundary user controlling described first community of acquisition, base station of the first community；
The resources occupation rate of the boundary user of described first community is sent to the second community by the base station that controls of described first community Control base station；Described second community is the neighbor cell of described first community, the control base station of described first community and described The control base station of the second community is different base station, and described first community and described second community have same carrier wave；Described The resources occupation rate of the boundary user of the first community is sent almost for configurating downlink by the base station that controls of described second community Empty frame, if the resources occupation rate of the boundary user of described first community is less than the first threshold value, under the most described second community The almost empty frame that row sends reduces N1, N1 >=1, if the resources occupation rate of the boundary user of described first community is more than second Threshold value, the almost empty frame of the descending transmission of the most described second community increases N2, N2 >=1, if the limit of described first community The resources occupation rate of boundary user is more than or equal to described first threshold value, and the resource occupation of the boundary user of described first community Rate is less than or equal to described second threshold value, does not the most change the quantity of the almost empty frame of the descending transmission of described second community, Described first threshold value is less than described second threshold value；
The base station that controls of described first community receives the interference information controlling base station of described second community；Described interference information bag Including almost empty frame information, described almost empty frame information is for indicating the almost empty frame of the descending transmission of described second community Time-domain position；
The control base station of described first community, according to described interference information, controls the switch of described first community, including:
Described interference information is compared by the base station that controls of described first community with preset threshold value, sentences according to comparative result Disconnected the need of closing described first community；
If desired close described first community, then the subscriber equipment in described first community is switched to the 3rd community, and closes Described first community；
If need not close described first community, then the boundary user of described first community is switched to described 3rd community, no Close described first community；
Wherein, the control base station controlling base station and described 3rd community of described first community is identical base station, and described the One community and described 3rd community have different carrier.
2. the method for Inter-Cell Interference Coordination as claimed in claim 1, it is characterised in that the control base station of described first community Obtain the resources occupation rate of the boundary user of described first community, including:
The measurement report of the user equipment to report controlling described first community of reception, base station of described first community, described measurement report Accuse the Reference Signal Received Power RSRP including described first communityPReference Signal Received Power with described second community RSRPM；
If RSRPM-Bias≤RSRPP＜ RSRPM, then judge that described subscriber equipment is the boundary user of described first community；If RSRPP＜ RSRPMBias or RSRPP≥RSRPM, then judge that described subscriber equipment is not the boundary user of described first community； Wherein, Bias is the Reference Signal Received Power difference being pre-configured with；
The resources occupation rate of the boundary user controlling described first community of statistics, base station of described first community.
3. the method for Inter-Cell Interference Coordination as claimed in claim 2, it is characterised in that the control of described first community The method of the resources occupation rate of the boundary user of described first community is added up in base station, including:
By the Resource Block quantity of the boundary user of described first community, divided by whole Resource Block quantity of described first community, obtain Obtain the resources occupation rate of the boundary user of described first community；Or
By the Resource Block quantity of the boundary user of described first community, divided by the number of resource blocks of the edge band of described first community Amount, it is thus achieved that the resources occupation rate of the boundary user of described first community.
4. the method for Inter-Cell Interference Coordination as claimed in claim 1, it is characterised in that the control base station of described first community Before the resources occupation rate of the boundary user obtaining described first community, also include:
When the control base station of described first community carries out cell range extension in described first community, to the control of described second community Base station processed sends cell range expanded configuration information；Described cell range expanded configuration information includes cell range extension biasing Value, and enable the time of described cell range extension bias；Described cell range expanded configuration information is used for notifying described The control base station change cell range expanded configuration of the second community；
The base station that controls of described first community receives the cell range extended response letter controlling base station return of described second community Breath.
5. the method for the Inter-Cell Interference Coordination as described in claim 1-4 any one, it is characterised in that described interference information Also include high interference instruction HII, overload instruction OI, Relative Narrowband TX Power RNTP, block error rate BLER, channel quality instruction At least one in CQI.
6. the method for Inter-Cell Interference Coordination as claimed in claim 1, it is characterised in that the control base station of described first community The control base station that the resources occupation rate of the boundary user of described first community is sent to the second community is included: described first community Control base station by X2 interface, or by S1 interface, or by Operations,Administration And Maintenance center OAM, or pass through base Stand and interface between the coordinator of base station, the resources occupation rate of the boundary user of described first community is sent to described second little The control base station in district.
7. a base station, it is characterised in that including:
Acquiring unit, for obtaining the resources occupation rate of the boundary user of the first community；
Transmitting element, for being sent to the control base of the second community by the resources occupation rate of the boundary user of described first community Stand；Described second community is the neighbor cell of described first community, the control base station of described first community and described second community Control base station be different base stations, and described first community and described second community have same carrier wave；Described first community Boundary user resources occupation rate by described second community control base station for configurating downlink send almost empty frame, if The resources occupation rate of the boundary user of described first community is less than the first threshold value, the descending transmission of the most described second community several Empty frame reduces N1, N1 >=1, if the resources occupation rate of the boundary user of described first community is more than the second threshold value, then The almost empty frame of the descending transmission of described second community increases N2, N2 >=1, if the money of the boundary user of described first community Source occupancy be more than or equal to described first threshold value, and the resources occupation rate of the boundary user of described first community less than or etc. In described second threshold value, the most do not change the quantity of the almost empty frame of the descending transmission of described second community, described first Limit value is less than described second threshold value；
Receiving unit, for receiving the interference information controlling base station of described second community, described interference information includes almost empty Sub-frame information；Described almost empty frame information is for indicating the time domain position of the almost empty frame of the descending transmission of described second community Put；With
Control unit, for according to described interference information, controls the switch of described first community；
Described control unit includes:
Judgment sub-unit, for described interference information being compared with preset threshold value, judges whether according to comparative result Need to close described first community；With
Coordinate subelement, for if desired closing described first community, then the subscriber equipment in described first community is switched to 3rd community, and close described first community；If need not close described first community, then the border of described first community is used Family is switched to described 3rd community, does not close described first community；
Wherein, the control base station controlling base station and described 3rd community of described first community is identical base station, and described the One community and described 3rd community have different carrier.
8. base station as claimed in claim 7, it is characterised in that described acquiring unit specifically includes:
Receiving subelement, for receiving the measurement report of the user equipment to report of described first community, described measurement report includes The Reference Signal Received Power RSRP of described first communityPReference Signal Received Power RSRP with described second communityM；
Determine subelement, if for RSRPM-Bias≤RSRPP＜ RSRPM, then judge that described subscriber equipment is described first community Boundary user；If RSRPP＜ RSRPMBias or RSRPP≥RSRPM, then judge that described subscriber equipment is not described first little The boundary user in district；Wherein, Bias is the Reference Signal Received Power difference being pre-configured with；With
Process subelement, for adding up the resources occupation rate of boundary user of described first community, and be sent to described second little The control base station in district.
9. base station as claimed in claim 8, it is characterised in that described process subelement is further used for:
By the Resource Block quantity of the boundary user of described first community, divided by whole Resource Block quantity of described first community, obtain Obtain the resources occupation rate of the boundary user of described first community；Or the Resource Block quantity of the boundary user by described first community, Resource Block quantity divided by the edge band of described first community, it is thus achieved that the resource occupation of the boundary user of described first community Rate.
10. base station as claimed in claim 7, it is characterised in that
Described transmitting element is additionally operable to: when carrying out cell range extension in described first community, to the control of described second community Base station sends cell range expanded configuration information；Described cell range expanded configuration information includes that cell range extends bias, And enable the time of described cell range extension bias；Described cell range expanded configuration information is used for notifying described second The control base station change cell range expanded configuration of community；
Described reception subelement is additionally operable to: receive described second community controls the cell range extended response letter that base station returns Breath.
11. 1 kinds of communication systems, it is characterised in that include the first community controls base station and the control base station of the second community；
The control base station of described first community is the base station as described in claim 7～10 any one；
The control base station of described second community, for the resources occupation rate of the boundary user according to described first community, under configuration The almost empty frame that row sends, and send almost empty frame information to the control base station of described first community；
The control base station of described second community includes:
Comparing unit, for by the resources occupation rate of the boundary user of described first community respectively with the first threshold value, second Limit value compares；Described first threshold value is less than described second threshold value；With
Dispensing unit, if the resources occupation rate of the boundary user for described first community is less than described first threshold value, then institute The almost empty frame of the descending transmission stating the second community reduces N1Individual, N1≥1；If the resource of the boundary user of described first community Occupancy is more than described second threshold value, and the almost empty frame of the descending transmission of the most described second community increases N2Individual, N2≥1；If The resources occupation rate of the boundary user of described first community is more than or equal to described first threshold value, and the limit of described first community The resources occupation rate of boundary user is less than or equal to described second threshold value, does not the most change descending transmission several of described second community The quantity of empty frame.
12. communication systems as claimed in claim 11, it is characterised in that the control base station of described first community is used further In, by X2 interface, or by S1 interface, or by Operations,Administration And Maintenance center OAM, or by base station and base station Interface between coordinator, sends the control of described second community to by the resources occupation rate of the boundary user of described first community Base station；
The control base station of described second community is further used for, by X2 interface, or by S1 interface, or by OAM, or Described interference information, by the interface between base station and base station coordinator, is sent to the control base station of described first community by person.
The method of 13. 1 kinds of Inter-Cell Interference Coordination, it is characterised in that including:
The base station that controls of the 3rd community receives the interference information that the control base station of the second community issues；Described interference information includes institute That states the second community controls the base station resources occupation rate according to the boundary user of the first community, the almost sky of the descending transmission of configuration The quantity of subframe, if the resources occupation rate of the boundary user of described first community is less than the first threshold value, the most described second community The almost empty frame of descending transmission reduce N1, N1 >=1, if the resources occupation rate of the boundary user of described first community is more than Second threshold value, the almost empty frame of the descending transmission of the most described second community increases N2, N2 >=1, if described first community The resources occupation rate of boundary user more than or equal to described first threshold value, and the resource of the boundary user of described first community Occupancy is less than or equal to described second threshold value, does not the most change the number of the almost empty frame of the descending transmission of described second community Amount, described first threshold value is less than described second threshold value；
The control base station of described 3rd community, according to described interference information, controls the switch of described 3rd community, including:
Described interference information is compared by the base station that controls of described 3rd community with preset threshold value, sentences according to comparative result Disconnected the need of closing described 3rd community；
If desired close described 3rd community, then close described 3rd community, and open the 4th community；
If need not close described 3rd community, the most not closing described 3rd community, and being not turned on described 4th community；
Wherein, the control base station controlling base station and described 4th community of described 3rd community is identical base station, and described the Three communities and described 4th community have different carrier；
Wherein, described first community, described second community and described 3rd community are neighbor cells；The control of described first community Base station, the control base station controlling base station and described 3rd community of described second community are different base stations, and described first little District, described second community and described 3rd community have same carrier wave.
The method of 14. Inter-Cell Interference Coordination as claimed in claim 13, it is characterised in that described interference information also includes height In interference instruction HII, overload instruction OI, Relative Narrowband TX Power RNTP, block error rate BLER, channel quality indicator (CQI) extremely One item missing.
15. 1 kinds of base stations, it is characterised in that including:
Receive unit, for receiving the interference information that the control base station of the second community issues；Described interference information includes described The control base station of two communities is according to the resources occupation rate of the boundary user of the first community, the almost empty frame of the descending transmission of configuration Quantity, if the resources occupation rate of the boundary user of described first community is less than the first threshold value, under the most described second community The almost empty frame that row sends reduces N1, N1 >=1, if the resources occupation rate of the boundary user of described first community is more than second Threshold value, the almost empty frame of the descending transmission of the most described second community increases N2, N2 >=1, if the limit of described first community The resources occupation rate of boundary user is more than or equal to described first threshold value, and the resource occupation of the boundary user of described first community Rate is less than or equal to described second threshold value, does not the most change the quantity of the almost empty frame of the descending transmission of described second community, Described first threshold value is less than described second threshold value；With
Control unit, for according to described interference information, controlling the switch of the 3rd community；
Described control unit specifically includes:
Judgment sub-unit, for described interference information being compared with preset threshold value, judges whether according to comparative result Need to close described 3rd community；With
Coordinate subelement, for if desired closing described 3rd community, then close described 3rd community, and open the 4th community； If need not close described 3rd community, the most not closing described 3rd community, and being not turned on described 4th community；
Wherein, the control base station controlling base station and described 4th community of described 3rd community is identical base station, and described the Three communities and described 4th community have different carrier；
Wherein, described first community, described second community and described 3rd community are neighbor cells；The control of described first community Base station, the control base station controlling base station and described 3rd community of described second community are different base stations, and described first little District, described second community and described 3rd community have same carrier wave.
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