CN103313337A - Method for eliminating inter-cell downlink interference - Google Patents
Method for eliminating inter-cell downlink interference Download PDFInfo
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- CN103313337A CN103313337A CN2012100658178A CN201210065817A CN103313337A CN 103313337 A CN103313337 A CN 103313337A CN 2012100658178 A CN2012100658178 A CN 2012100658178A CN 201210065817 A CN201210065817 A CN 201210065817A CN 103313337 A CN103313337 A CN 103313337A
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Abstract
The invention provides a method for eliminating inter-cell downlink interference. The method comprises the steps that a first base station informs a second base station of information transmitted by an ABS (Almost Blank Subframe) in a non-zero power way, the quality of signals of the ABS transmitted in the non-zero power way is measured by UE (User Equipment) in a cell configured by the second base station, the condition that the UE is subjected to downlink interference in the non-zero ABS is fed back to the first base station, and the non-zero ABS can be adjusted through the first base station according to the feedback of the second base station. By applying the method for eliminating inter-cell downlink interference, the wireless resource utilization rate can be improved and the inter-cell downlink interference can be eliminated in an applying field that an interference source cell is provided with the ABS.
Description
Technical field
The present invention relates to wireless communication technology, particularly a kind of method of eliminating the descending interference in minizone.
Background technology
Fig. 1 is the system architecture diagram of System Architecture Evolution (SAE), and wherein, subscriber equipment (UE) the 101st is used for the terminal equipment of receive data.Evolved universal terrestrial radio access network (E-UTRAN) the 102nd, Radio Access Network is comprising the macro base station (eNodeB/NodeB) that the access of radio network interface is provided for UE.Mobile management entity (MME) 103 is in charge of mobile context, session context and the security information of UE.Gateway (SGW) 104 mainly provides the function of user plane, and MME 103 and SGW 104 may be in the Same Physical entity.Grouped data network gateway (PGW) 105 is responsible for the functions such as charging, Lawful Interception, also can be in the Same Physical entity with SGW 104."Policy and Charging Rules Function entity (PCRF) 106 provides service quality (QoS) strategy and charging criterion.Universal grouping wireless business supporting node (SGSN) the 108th provides the apparatus for network node of route for data transfer in the universal mobile telecommunications system (UMTS).Home subscriber server (HSS) the 109th, the local of UE ownership subsystem, responsible protection comprises address, the user security information of current location, the service node of subscriber equipment, the user profile such as packet data content of subscriber equipment.
The resource management function purpose is in order to effectively utilize existing resource, to guarantee that E-UTRAN satisfies the related needs of Radio Resource.RRM (RRM) function provides in the residential quarter and the resource between a plurality of residential quarter is distributed, heavily distribute and the operation such as release.
The interference coordination of minizone is controlled at the interference between the residential quarter in certain scope by the Radio Resource of management minizone.Disturb the mechanism of eliminating to comprise: the interference cancellation mechanisms of frequency and the interference cancellation mechanisms of time domain.ICIC (inter-cell interference cancellation, Inter-cell Interference Cancellation) mechanism is wanted between reference cell the information that exchanges for RRM, such as the resource operating position, the information such as data payload situation can adopt different mechanism to reduce the interference of uplink and downlink.
The ICIC mechanism of frequency mainly is to allow different residential quarters use different wireless resource blocks.
The subframe that use different residential quarters is coordinated in the main configuration by signaling or OAM of ICIC mechanism of time domain.This coordination is by arranging blank subframe pattern (Almost Blank Subframe patterns is called for short ABS) realization, and the interference source residential quarter arranges the ABS subframe, and notice is disturbed the residential quarter.For the interference source residential quarter, the ABS subframe refers to not send at down channel the subframe of data, and perhaps the base station sends the subframe of data with very low transmitting power; Non-ABS subframe refers to send at down channel with normal transmission power the subframe of data.For being disturbed the residential quarter, obtain the ABS pattern of interference source residential quarter after, just can send downlink data in the resource that is configured to the ABS subframe.
Fig. 2 and Fig. 3 have illustrated application scenarios and the working mechanism of present ABS.Among Fig. 2 and Fig. 3, be macro base station with base station, place, interference source residential quarter, being disturbed base station, place, residential quarter is that the Pico base station is example.
In Fig. 2, a Pico base station (femto base station) is arranged in the coverage of macro base station, because the transmitting power of macro base station is larger, the user of Pico residential quarter has received the downstream signal of macro base station emission, concerning the user of Pico residential quarter, this is an interference.Surpassed certain thresholding if disturb, just so that the user of Pico residential quarter can not correct measurement macro base station residential quarter quality, measurement to the adjacent area is the steps necessary of finishing switching, if the mass measurement to the adjacent area is incorrect, just can not finish correct handoff procedure, the user of Pico residential quarter also needs to detect the quality of this residential quarter control signal, this control signal has been subject to the interference of macro base station downlink data, if interference ratio is larger, can cause the control signal of Pico residential quarter to be submerged in the interference of macro base station downlink data, can not detect the control signal of this residential quarter.
The interference that is subject to for the user who guarantees under the Pico is in certain scope, and macro base station can configure ABS, as shown in Figure 3.ABS is some special subframes, and on these subframes, macro base station does not send downlink data, and the configuration of these subframes is called the ABS pattern.The ABS pattern is notified the base station to Pico by X2 interface, and the Pico base station can send downlink data in these subframes with the transmitting power of maximum; Simultaneously, the ABS pattern also can be notified to UE, if the Serving cell of UE is the Pico residential quarter among Fig. 2, during UE measure neighbor macrocell signal, needs to measure RSRP and RSRQ.
RSRP is the received power of reference signal, measurement be the power of the cell reference signals on a resource element (Resource Element).RSRQ is the quality of reception of cell reference signals, and its value equals N*RSRP/ (RSSI), and wherein, N is the number of Resource Block, and RSSI disturbs, and comprises the interference from Serving cell, non-service cell and thermal noise.
When the quality of Pico UE measure neighbor macro base station, only measure the quality of reception of cell reference signals corresponding to ABS subframe.This be because: the interference ratio from the macrocell data that resource corresponding to non-ABS subframe is subject to is larger, RSRQ is the ratio of RSRP and interference, usually, the down transmitting power of macro base station is larger, UE interference ratio to the Pico residential quarter is larger, in the situation that interference ratio is larger, although can measure RSRP, RSRQ is very little.And macrocell does not have the distribute data transmission on resource corresponding to ABS subframe, and is smaller to the interference of Pico UE, just can measure RSRQ.UE reports to the base station after the measured value of the cell reference signals on the ABS subframe in a period of time is averaged, and the base station is according to measurement result, determines whether UE to be switched to the residential quarter of better quality.
There is following problem in above-mentioned prior art: macro base station can not send downlink data on the ABS subframe, and resource utilization is not high.If macro base station does not send data on some ABS subframe, but on some ABS subframe, send data with certain power, then can improve the utilization ratio of resource.Yet, these ABS subframes that send data may cause descending interference to Pico UE, according to above-mentioned prior art, Pico UE will measure RSRP and the RSRQ of the cell reference signals on these ABS subframes, and the measurement result in a period of time averaged rear report to the base station, as seen, the signal quality that the RSRP after average and RSRQ can not correctly react the ABS subframe.
Summary of the invention
The invention provides a kind of method of eliminating the descending interference in minizone, under the application scenarios that has configured the ABS subframe at macro base station, when improving wireless resource utility efficiency, eliminate the descending interference of minizone.
A kind of method of eliminating the descending interference in minizone provided by the invention comprises:
The first base station sends to the second base station with blank subframe (ABS) configuration information; Comprise in the described ABS configuration information: the positional information of non-zero ABS subframe; Non-zero ABS subframe refers to: in the ABS subframe of the first base station configuration, and the subframe that the transmitting power of the first base station is non-vanishing;
The second base station feeds back to the first base station with the subscriber equipment in this residential quarter (UE) at the descending disturbed condition that non-zero ABS subframe is subject to.
Preferably, after the feedback of the second base station is received in the first base station, the transmitting power of non-zero ABS subframe is adjusted.
The method may further include: receive after the ABS configuration information of the first base station transmission the second base station, UE in this residential quarter sends measurement configuration information, notify the UE in this residential quarter that the signal quality of non-zero ABS subframe is measured, and receive the measurement report that UE reports.
The second base station can further notify the UE in this residential quarter that the signal quality of ABS subframe and non-zero ABS subframe is measured respectively.
Preferably, comprise the mapping graph of non-zero ABS subframe and the mapping graph of ABS subframe in the described ABS configuration information; The positional information of non-zero ABS subframe is determined by the mapping graph of non-zero ABS subframe and the mapping graph of ABS subframe.
Can further comprise in the described ABS configuration information:
The first base station is in the transmitting power of non-zero ABS subframe,
The power threshold that perhaps calculates in the transmitting power of non-zero ABS subframe according to the first base station,
Perhaps non-zero ABS measures mapping graph; Each bit that described non-zero ABS measures in the mapping graph represents a non-zero ABS subframe, and whether the different values by bit are illustrated in this non-zero ABS subframe needs signal quality is measured.
Preferably, the mapping graph and at least one the measurement subset that comprise the ABS subframe in the described ABS configuration information;
Each measures the subset that subset is ABS subframe collection, according to the difference of the first base station transmitting power on the ABS subframe ABS subframe collection is divided to obtain; When the quantity of measuring subset was one, this measurement subset was used for non-zero ABS subframe is measured; When the quantity of measuring subset was two, one of them measured subset for the ABS subframe is measured, and another is measured subset and is used for non-zero ABS subframe is measured.
Can further comprise in the described ABS configuration information: the power threshold that calculates in the transmitting power of ABS subframe according to the first base station.
Preferably, comprise an ABS measurement configuration information in the described measurement configuration information, described ABS measurement configuration information is the positional information of non-zero ABS subframe and measures configuration parameter;
Perhaps, comprise two ABS measurement configuration information in the described measurement configuration information, one of them ABS measurement configuration information is positional information and the measurement configuration parameter of non-zero ABS subframe, and another is the positional information of ABS subframe and measures configuration parameter.
Preferably, descending disturbed condition that the UE in this residential quarter is subject in non-zero ABS subframe mode of feeding back to the first base station in the second base station comprises:
Descending disturbed condition is divided into different ranks, reports the rank of descending disturbed condition to the first base station or when descending disturbed condition is in highest level, report to macro base station;
Perhaps, notify the first base station to improve or be reduced in the transmitting power of non-zero ABS subframe;
Perhaps, determine a transmitting power, and notify the first base station to launch with determined transmitting power in non-zero ABS subframe.
Preferably, the first base station mode that non-zero ABS subframe is adjusted comprises:
On time slot corresponding to non-zero ABS subframe, corresponding different wireless resource block arranges different transmitting powers, and according to the descending disturbed condition in different the second base stations, the wireless resource block of different transmission power is distributed to the second different base stations use;
Perhaps, with reference to the disturbed condition that report the second base station, the transmitting power of non-zero ABS subframe is adjusted, comprised the transmitting power that raises or reduce non-zero ABS subframe.
Preferably, the first base station sends in the ABS configuration information of the second base station and further comprises: on the corresponding time slot of non-zero ABS subframe, and the transmitting power of each wireless resource block.
As seen from the above technical solution, method provided by the invention has improved the utilization ratio of the Radio Resource of interference source residential quarter, improved the certainty of measurement of UE, can measure the disturbed condition that downlink data is subject to, make the base station that is disturbed the place, residential quarter can optimally dispatch UE, by descending disturbed condition being reported the base station to place, interference source residential quarter, make the base station at place, interference source residential quarter can control further the interference of minizone, and can give the different Resource Block that are disturbed in the cell allocation different time-gap.
Description of drawings
Fig. 1 is existing SAE system architecture diagram;
Fig. 2 is the application scenarios structure chart of existing ABS;
Fig. 3 is working mechanism's schematic diagram of existing ABS;
Fig. 4 is the schematic flow sheet of eliminating the method for the descending interference in minizone in the embodiment of the invention one;
Fig. 5 is the schematic diagram of the performed operation of UE in the embodiment of the invention one;
Fig. 6 is the schematic diagram of the performed operation in base station in the embodiment of the invention one;
Fig. 7 is the schematic flow sheet of eliminating the method for the descending interference in minizone among the embodiment two.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
In order to solve the existing problem of prior art, the present invention proposes a kind of technical scheme of eliminating the descending interference in minizone, its main thought is: the first base station is with location information notification second base station of non-zero ABS subframe, the UE that the second base station configures in this residential quarter measures non-zero ABS subframe, and UE is fed back to the first base station at the descending disturbed condition that non-zero ABS subframe is subject to.When needed, the first base station can according to the feedback of the second base station, be adjusted non-zero ABS subframe.
Among the present invention, non-zero ABS subframe refers to: in the ABS subframe of the first base station configuration, and the subframe that the transmitting power of the first base station is non-vanishing.
Among the present invention, the first base station refers to produce the base station at the place, residential quarter of descending interference, and the second base station refers to the cell base station at the UE place that is interfered, namely is disturbed the base station at place, residential quarter.Consider: if the first base station has produced descending interference to the UE under a plurality of base stations, for example, first base station has produced descending interference to the UE of two base stations, i.e. first base station, the situation of two the second base stations, the second base station is different from the distance of the first base station, and the interference from the first base station that is subject to is also different.For example: in the first base station with identical power in the situation that the ABS subframe sends data, the UE under some second base station can normal receive data, but the UE under some second base station is with regard to owing to disturbing too greatly and correctly receive data.For this reason, the present invention is on the basis of technique scheme, a kind of technical scheme of optimization has also been proposed, the first base station is on the corresponding time slot of non-zero ABS subframe, corresponding different wireless resource block arranges different transmitting powers, and be disturbed the difference of the descending disturbed condition in the cell base station according to difference, the wireless resource block of different transmission power is distributed to the different cell base stations that is disturbed to be used, that is: some wireless resource block is distributed to some base station, and these wireless resource blocks can not be used in other base stations.
Among the present invention, the first base station can be macro base station, Pico base station, Home eNodeB, little base station or femto base station, and the second base station can be Pico base station, Home eNodeB, common macro base station, little base station, femto base station etc.
Below in conjunction with accompanying drawing, the present invention is described in detail by embodiment.In an embodiment, for convenience, the first base station is with macro base station, and the second base station illustrates with the Pico base station.
Embodiment one:
The present embodiment has been described macro base station and has been notified the base station to Pico with the relevant information of non-zero ABS subframe, the UE that the Pico base station configures in this residential quarter measures the signal quality of non-zero ABS subframe, and the descending disturbed condition that UE is subject in non-zero ABS subframe is sent to the technical scheme of macro base station, as shown in Figure 4.The method can may further comprise the steps:
Step 401: macro base station sends to the Pico base station with the ABS configuration information, comprises at least the positional information of non-zero ABS subframe in this ABS configuration information.
The ABS configuration information can pass through at present defined message bearing, perhaps by the new message bearing that defines.For the content that comprises in the ABS configuration information, the invention provides two kinds of better implementations.
A kind of implementation is: comprise the mapping graph of non-zero ABS subframe and the mapping graph of ABS subframe in the ABS configuration information; The positional information of non-zero ABS subframe is determined by the mapping graph of non-zero ABS subframe and the mapping graph of ABS subframe.Particularly:
In the mapping graph of non-zero ABS subframe, each bit represents a subframe, represents by different values whether this subframe is non-zero ABS subframe.For example: if be arranged to 1, represent that this subframe is non-zero ABS subframe, macro base station will send downlink data with certain power; If be arranged to 0, expression is not a non-zero ABS subframe, may be that transmitting power is 0 ABS subframe, or the subframe of normal transmission power.
The mapping graph of ABS subframe (that is: ABS pattern) is defining in the agreement at present, and the ABS pattern is the mapping graph of 40 bits, and each bit represents a subframe, if be arranged to 1, representing this subframe is the ABS subframe, if be arranged to 0, represents that this subframe is not the ABS subframe.
The mapping graph of non-zero ABS subframe is combined with the mapping graph of ABS subframe, can determine which is the subframe of descending not the transmission of data, which is the subframe of normal transmission data, and which is the non-zero ABS subframe of coming the transmission of data with the power lower than normal transmission power.
Except the mapping graph of the mapping graph of non-zero ABS subframe and ABS subframe, can also comprise macro base station in the ABS configuration information in the transmitting power of non-zero ABS subframe, the power threshold that is perhaps calculated in the transmitting power of non-zero ABS subframe by macro base station.
In addition, the ABS configuration information can also comprise the measurement configuration information to UE.For example: can be mapping graph of non-zero ABS subframe special configuration, be called non-zero ABS and measure mapping graph, each bit in this mapping graph represents a non-zero ABS subframe, and whether the different values by bit are illustrated in this non-zero ABS subframe needs signal quality is measured.For example, if be arranged to 1, expression UE will measure this non-zero ABS subframe, if be arranged to 0, expression does not need to measure.
Another kind of implementation is: mapping graph and at least two measurement subsets of comprising the ABS subframe in the ABS configuration information.Measure the subset that subset is ABS subframe collection, according to the difference of macro base station transmitting power on the ABS subframe ABS subframe collection is divided, respectively measured subset; When the quantity of measuring subset was two, one of them measured subset for the ABS subframe is measured, and another is measured subset and is used for non-zero ABS subframe is measured.Optionally, can also comprise macro base station in the ABS configuration information in the threshold value of the transmitting power of ABS subframe.
The ABS subframe hint obliquely at the mapping graph that figure is 40 bits, if be arranged to 1, representative is descending blank transmission or transmits with the power less than thresholding, is also referred to as to be configured to the ABS subframe; If be arranged to 0, the expression down transmitting power may be larger, do not guarantee less than threshold value.
Dividing at least two measurement subsets is to consider, Pico thinks the base station and is being arranged in the mapping graph on 1 the ABS subframe, macro base station can not send data, the descending interference that UE in the Pico residential quarter is subject to is less, therefore some users can be dispatched on this subframe, and in fact the transmitting power of macro base station on non-zero ABS subframe is non-vanishing, in case macro base station is larger in the transmitting power of non-zero ABS subframe, so, will be larger to the descending interference of Pico UE.Therefore, if threshold value arranges unreasonablely, the correctly degree of receive data is arrived greatly in the descending interference that PicoUE is subject to.Therefore, need to be non-vanishing to transmitting power, the resource that still has been configured to the ABS subframe is carried out the measurement of descending interference.
Step 402:Pico base station sends measurement configuration information to UE, notifies the UE in this residential quarter that the signal quality of ABS subframe and non-zero ABS subframe is measured respectively.
In this step, comprise in the measurement configuration information: the sign of the residential quarter that measure and quality threshold can also comprise an ABS measurement configuration information or two ABS subframe measurement configuration information.When comprising an ABS measurement configuration information, what this ABS measurement configuration information was corresponding is the non-vanishing ABS subframe of macro base station transmitting power, wherein comprise the time non-zero ABS subframe positional information and measure configuration parameter.When comprising two ABS measurement configuration information, be respectively transmitting power be zero the ABS subframe positional information and measure configuration parameter, and the positional information of the ABS subframe of transmitting power non-zero and measure configuration parameter.
Measurement configuration information can be passed through at present defined message bearing, perhaps by the new message bearing that defines.
Measure in the configuration parameter, the quality threshold of measurement can be the threshold value of RSRQ, for ABS subframe and non-zero ABS subframe, can configure different thresholdings.UE measures ABS subframe and non-zero ABS subframe respectively, and when satisfying the report condition, measurement result is reported the base station to Pico.
Pico UE measures the quality of Serving cell, mainly be the RSRQ that measures the ABS subframe, this moment, Pico UE was subject to the interference minimum of macro base station signal, if but the macro base station transmitting power is non-vanishing on the ABS subframe, so, pico UE is subject to the non-constant of quality that the interference of macro base station signal may cause this cell measurement to arrive.Therefore, the Pico base station wants configuration UE that the non-vanishing ABS subframe of transmitting power is carried out independent measurement.
Step 403:UE comprises sign and the measurement result of the residential quarter that will measure to Pico base station reporting measurement reports in the measurement report.Measurement report can pass through at present defined message bearing, perhaps by the new message bearing that defines.
Step 404:Pico base station feeds back to macro base station with the descending disturbed condition that UE in this residential quarter is subject to.The feeding back downlink disturbed condition has following several implementation:
A kind of mode is: descending disturbed condition is divided into different ranks, and such as high interference, middle interference and low the interference, the rank of descending disturbed condition is reported in the Pico base station to macro base station; Perhaps only report high interference, that is: when descending disturbed condition is in highest level, report to macro base station.
Another kind of mode is: the Pico base station has obtained the interfere information that UE reports from the measurement report of UE, also obtained the information of the transmitting power of macro base station on non-zero ABS subframe according to the ABS configuration information of macro base station transmission, therefore, the Pico base station can be judged the transmitting power of macro base station on non-zero ABS subframe and should improve or reduce, then, according to the result who judges, Pico base station notice macro base station improves or is reduced in the transmitting power of non-zero ABS subframe.
Also have a kind of mode to be: a suitable transmitting power is determined according to measurement report and the transmitting power of macro base station on non-zero ABS subframe of UE in the Pico base station, and the notice macro base station is launched with determined transmitting power on non-zero ABS subframe.Macro base station uses this transmitting power to launch, and Pico UE still can correctly detect and parse downlink data.
Macro base station is adjusted the transmitting power of non-zero ABS subframe according to the feedback of Pico base station, comprises the transmitting power that raises or reduce non-zero ABS subframe.
Fig. 5 is the schematic diagram of the performed operation of UE in the embodiment of the invention one.This UE is Pico UE, and Pico UE has specifically carried out following operation:
Step 501:Pico UE receives the measurement configuration information that the Pico base station sends, comprising to the measurement configuration information of Serving cell and/or to the measurement configuration information of adjacent cell.
In order to detect macro base station in the interference to Pico user of the downlink data of non-zero ABS subframe, the Pico base station is that Pico UE has configured two and measures subsets, and one is the measurement subset for common ABS subframe, and one is the measurement subset for non-zero ABS subframe.Perhaps a configuration pin is used for detecting the downlink data of non-zero ABS subframe to Pico user's interference to the measurement subset of non-zero ABS subframe.
Step 502:UE measures RSRP and the RSRQ of Serving cell.
In this step, UE measures according to the measurement subset of Pico base station configuration, measures subset if configured two, and UE measures subset to two and measures respectively, and the below is with the be measured as example of Pico UE to service Pico residential quarter.On the one hand, power and quality to the residential quarter control signal on non-zero ABS subframe are measured, and the measurement result in the certain hour is averaged, and obtain the measurement result corresponding to non-zero ABS subframe.On the other hand, on common ABS zero subframe, power and the quality of residential quarter control signal are measured, the measurement result in the certain hour is averaged, obtain the measurement result corresponding to the ABS subframe.Because the measurement purpose to these two kinds of subframes is different, therefore, to the measurement of these two kinds of subframes, can configure different reporting mechanisms, UE reports according to measuring the step 503 that is configured in of reporting.
Fig. 6 is the schematic diagram of the performed operation in base station in the embodiment of the invention one.
Step 601: it is non-vanishing that macro base station arranges the transmitting power of some ABS subframe, and notify the base station to Pico with the configuration information of non-zero ABS subframe.
The configuration information of non-zero ABS subframe is included in the non-vanishing information of transmitting power on which subframe, i.e. the positional information of non-zero ABS subframe also comprises the information of transmitting power.The information of transmitting power can be the transmitting power that macro base station uses on these subframes, or the threshold value of being calculated by transmitting power, for example, transmitting power on the subframe sends to Pico base station as threshold value by X2 interface divided by the average transmit power that is calculated by maximum transmission power and wireless resource block.Perhaps represent that by configuring different measurement subsets macro base station is different in time slot transmitting power corresponding to measurement subset.For example: configure two and measure subsets, one what measure the subset indication is that transmitting power is 0 subframe, and what another measured subset indication is that transmitting power is not 0, but the subframe lower than normal transmission power, i.e. measurement subset corresponding to non-zero ABS subframe.
After step 602:Pico receives the base station configuration information of non-zero ABS subframe, from the information that UE reports, obtain non-zero ABS subframe to the disturbed condition of the down channel of Pico UE, and report to macro base station.
Step 603: macro base station is adjusted the transmitting power of non-zero ABS subframe according to the report of Pico base station.
When adjusting, can adopt the method for time domain and frequency domain combination, on time slot corresponding to non-zero ABS subframe, the corresponding different different transmitting powers of wireless resource block configuration, and according to the descending disturbed condition in the different Pico base station, the wireless resource block of different transmission power is distributed to different Pico base stations use.For example, assumed wireless Resource Block sequence number is that 1 to 9 transmitting power is no more than P1, and sequence number is that the transmitting power of 10 to 20 wireless resource block is no more than P2, P1＞P2.When if the macro base station transmitting power is P1, the downlink signal quality of Pico base station 1 has been lower than the thresholding that can resolve, and so, it is 10 to 20 wireless resource block that sequence number just can only be used in Pico base station 1.
Embodiment two:
In the present embodiment, macro base station is that different wireless resource blocks arranges different transmitting powers on the non-zero ABS subframe, the configuration information of non-zero ABS subframe is transmitted to two Pico base stations, collect descending disturbed condition from two Pico base stations, and accordingly different wireless resource blocks is distributed to different Pico base stations and used.
Fig. 7 is the schematic flow sheet of eliminating the method for the descending interference in minizone in the embodiment of the invention two.Flow process shown in Figure 7 comprises following steps:
Step 701: macro base station is transmitted to Pico base station 1 and Pico base station 2 with the ABS configuration, comprises at least the positional information of non-zero ABS subframe in this ABS configuration information.
In this step, the content that the ABS configuration information comprises and implementation are identical with step 401, do not repeat them here.
Step 702:Pico base station 1 sends " measuring configuration " information to UE1, Pico base station 2 sends measurement configuration information to UE2, message comprises in the measurement configuration information: the sign of the residential quarter that measure,, quality threshold,, the measurement configuration information of the ABS subframe of measuring and, the measurement configuration information of the non-zero ABS subframe that measure.Pico base station 2 sends " measuring configuration ", and message is to UE2, and message comprises: the sign of the residential quarter that measure, quality threshold, the ABS sub-frame configuration that measure, the non-zero sub-frame configuration that measure.
In this step, the content that measurement configuration information comprises and that the mode of measurement configuration information is set is identical with step 402 does not repeat them here.
UE1 and UE2 finish after the measurement, respectively to Pico base station 1 and Pico base station 2 reporting measurement reports.
Step 703:Pico base station 1 and Pico base station 2 feed back to macro base station with the descending disturbed condition that UE in this residential quarter is subject to respectively.
In this step, Pico base station 1 is identical with step 404 with the mode of Pico base station 2 feeding back downlink disturbed conditions, does not repeat them here.
Step 704: macro base station sends the ABS configuration information to the Pico base station, the mapping graph that comprises the ABS subframe, the down transmitting power information that also comprises wireless resource block in the non-zero ABS subframe, for example, by threshold value or the down transmitting power that down transmitting power calculates, can also comprise the transmitting power of wireless resource block than this down transmitting power or the large still little information of threshold value.
In this step, after macro base station is received the feedback of Pico base station, can adjust according to the feedback of Pico base station the transmitting power of non-zero ABS subframe.Macro base station also can adopt the method for time domain and frequency domain combination, and wireless resource blocks corresponding different on time slot corresponding to non-zero ABS subframe configure different transmitting powers, and these resource block assignments use for different Pico base stations.For example, the wireless resource block sequence number is that 1 to 9 transmitting power is no more than P1, and sequence number is that the transmitting power of 10 to 20 wireless resource block is no more than P2, P1＞P2.When if the macro base station transmitting power is P1, the downlink signal quality of Pico base station 1 has been lower than the thresholding that can resolve, Pico base station 1 can only be in the situation that the macro base station transmitting power correct receive data that is P2, and so, it is 10 to 20 wireless resource block that sequence number is just only used in Pico base station 1.It is P1 that the macro base station transmitting power can be stood in Pico base station 2, and so, all wireless resource blocks can be used in Pico base station 2.
So, it is P2 that macro base station is issued the down transmitting power information that comprises in the ABS configuration information of giving Pico base station 1, and indication is in the ABS subframe, and the transmitting power of macro base station in sequence number is 10 to 20 Resource Block is less than P2.Like this, Pico base station 1 can be some user assignments on 10 to 20 the Resource Block in ABS subframe sequence number just.It is P1 that macro base station is issued the down transmitting power information that comprises in the configuration information of giving Pico base station 2, and indication is in the ABS subframe, and the transmitting power of macro base station in sequence number is 0 to 20 Resource Block is less than P1.Like this, Pico base station 2 can be some user assignments on 0 to 20 the Resource Block in ABS subframe sequence number just.
Utilize this method, can be different according to the descending interference that the Pico base station is subject to, resource is further segmented, more effectively utilized limited resource.
As seen from the above-described embodiment, method provided by the invention has improved the utilization ratio of the Radio Resource of interference source residential quarter, improved the certainty of measurement of UE, can measure the disturbed condition that downlink data is subject to, make the base station that is disturbed the place, residential quarter can optimally dispatch UE, by descending disturbed condition being reported the base station to place, interference source residential quarter, make the base station at place, interference source residential quarter can control further the interference of minizone, and can give the different Resource Block that are disturbed in the cell allocation different time-gap.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (12)
1. method of eliminating the descending interference in minizone is characterized in that:
The first base station sends to the second base station with blank subframe (ABS) configuration information; Comprise in the described ABS configuration information: the positional information of non-zero ABS subframe; Non-zero ABS subframe refers to: in the ABS subframe of the first base station configuration, and the subframe that the transmitting power of the first base station is non-vanishing;
The second base station feeds back to the first base station with the subscriber equipment in this residential quarter (UE) at the descending disturbed condition that non-zero ABS subframe is subject to.
2. method according to claim 1 is characterized in that:
After the feedback of the second base station is received in the first base station, the transmitting power of non-zero ABS subframe is adjusted.
3. method according to claim 2 is characterized in that, the method further comprises:
The second base station receives that the UE in this residential quarter sends measurement configuration information, notifies the UE this residential quarter in that the signal quality of non-zero ABS subframe is measured after the ABS configuration information that the first base station sends, and the measurement report that reports of reception UE.
4. method according to claim 3 is characterized in that:
The second base station further notifies the UE in this residential quarter that the signal quality of ABS subframe and non-zero ABS subframe is measured respectively.
5. according to claim 1 to 4 each described methods, it is characterized in that:
Comprise the mapping graph of non-zero ABS subframe and the mapping graph of ABS subframe in the described ABS configuration information; The positional information of non-zero ABS subframe is determined by the mapping graph of non-zero ABS subframe and the mapping graph of ABS subframe.
6. method according to claim 5 is characterized in that, further comprises in the described ABS configuration information:
The first base station is in the transmitting power of non-zero ABS subframe,
The power threshold that perhaps calculates in the transmitting power of non-zero ABS subframe according to the first base station,
Perhaps non-zero ABS measures mapping graph; Each bit that described non-zero ABS measures in the mapping graph represents a non-zero ABS subframe, and whether the different values by bit are illustrated in this non-zero ABS subframe needs signal quality is measured.
7. according to claim 1 to 4 each described methods, it is characterized in that:
The mapping graph and at least one the measurement subset that comprise the ABS subframe in the described ABS configuration information;
Each measures the subset that subset is ABS subframe collection, according to the difference of the first base station transmitting power on the ABS subframe ABS subframe collection is divided to obtain; When the quantity of measuring subset was one, this measurement subset was used for non-zero ABS subframe is measured; When the quantity of measuring subset was two, one of them measured subset for the ABS subframe is measured, and another is measured subset and is used for non-zero ABS subframe is measured.
8. method according to claim 7 is characterized in that:
Further comprise in the described ABS configuration information: the power threshold that calculates in the transmitting power of ABS subframe according to the first base station.
9. method according to claim 3 is characterized in that:
Comprise an ABS measurement configuration information in the described measurement configuration information, described ABS measurement configuration information is the positional information of non-zero ABS subframe and measures configuration parameter;
Perhaps, comprise two ABS measurement configuration information in the described measurement configuration information, one of them ABS measurement configuration information is positional information and the measurement configuration parameter of non-zero ABS subframe, and another is the positional information of ABS subframe and measures configuration parameter.
10. according to claim 1 to 4 each described methods, it is characterized in that, the mode that the second base station is subject to the UE in this residential quarter in non-zero ABS subframe descending disturbed condition feeds back to the first base station comprises:
Descending disturbed condition is divided into different ranks, reports the rank of descending disturbed condition to the first base station or when descending disturbed condition is in highest level, report to macro base station;
Perhaps, notify the first base station to improve or be reduced in the transmitting power of non-zero ABS subframe;
Perhaps, determine a transmitting power, and notify the first base station to launch with determined transmitting power in non-zero ABS subframe.
11. to 4 each described methods, it is characterized in that according to claim 2, the mode that the first base station is adjusted non-zero ABS subframe comprises:
On time slot corresponding to non-zero ABS subframe, corresponding different wireless resource block arranges different transmitting powers, and according to the descending disturbed condition in different the second base stations, the wireless resource block of different transmission power is distributed to the second different base stations use;
Perhaps, with reference to the disturbed condition that report the second base station, the transmitting power of non-zero ABS subframe is adjusted, comprised the transmitting power that raises or reduce non-zero ABS subframe.
12. method according to claim 11 is characterized in that:
The first base station sends in the ABS configuration information of the second base station and further comprises: on the corresponding time slot of non-zero ABS subframe, and the transmitting power of each wireless resource block.
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| CN104115519A (en) * | 2012-03-26 | 2014-10-22 | 富士通株式会社 | Method and device for solving uplink interference in heterogeneous network |
| CN104254102A (en) * | 2013-06-26 | 2014-12-31 | 中兴通讯股份有限公司 | Measurement report reporting method, communication node and system |
| CN103619022A (en) * | 2013-12-06 | 2014-03-05 | 中国联合网络通信集团有限公司 | Method and device for interference coordination between cells in heterogeneous network |
| CN103619022B (en) * | 2013-12-06 | 2017-02-01 | 中国联合网络通信集团有限公司 | Method and device for interference coordination between cells in heterogeneous network |
| WO2015169036A1 (en) * | 2014-05-09 | 2015-11-12 | 中兴通讯股份有限公司 | Interference processing method, base station, terminal and system |
| CN107409322A (en) * | 2015-04-10 | 2017-11-28 | 三星电子株式会社 | Jamming report |
| US11153773B2 (en) | 2015-04-10 | 2021-10-19 | Samsung Electronics Co., Ltd. | Interference reporting |
| CN105873220A (en) * | 2016-06-08 | 2016-08-17 | 东南大学 | Interference coordination method of two-layer non-uniform topological structure heterogeneous network |
| CN105873220B (en) * | 2016-06-08 | 2019-05-21 | 东南大学 | A kind of disturbance coordination method of two layers of non-homogeneous topological structure heterogeneous network |
| CN110740506A (en) * | 2019-10-25 | 2020-01-31 | 成都精位科技有限公司 | Control method and device based on dual-network embedded UWB network |
| CN110740506B (en) * | 2019-10-25 | 2020-12-04 | 成都精位科技有限公司 | Control method and device based on dual-network embedded UWB network |
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