CN102761973A - Method and system for adjusting almost bias subframe in heterogeneous network - Google Patents
Method and system for adjusting almost bias subframe in heterogeneous network Download PDFInfo
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- CN102761973A CN102761973A CN2011101114152A CN201110111415A CN102761973A CN 102761973 A CN102761973 A CN 102761973A CN 2011101114152 A CN2011101114152 A CN 2011101114152A CN 201110111415 A CN201110111415 A CN 201110111415A CN 102761973 A CN102761973 A CN 102761973A
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Abstract
The invention discloses a method for adjusting an ABS (Almost Bias Subframe) in a heterogeneous network. The method comprises the following steps of: selecting users subjected to strong interference based on an RSRP (Reference Signal Received Power) fed back by UE (User Equipment) of a user by a micro base station; judging that the traditional ABS cannot meet the requirements of the users to be scheduled, subjected to strong interference, according to the number of the users subjected to strong interference to be scheduled and feeding information of the users to be scheduled, subjected to strong interference, back to a macro base station; and adjusting the ABS according to the information of the users to be scheduled, subjected to strong interference, by the macro base station. The invention also discloses the method for adjusting the ABS in the heterogeneous network. Therefore, the time delay of an ABS mode between the macro base station and the micro base station is shortened and the throughout of the whole system is improved.
Description
Technical field
The present invention relates to communication technical field, more specifically, relate in a kind of heterogeneous network the almost method of adjustment and the system of gap frame (ABS).
Background technology
Existing research shows, in advanced (LTE-advanced) system of Long Term Evolution, introduces heterogeneous network.Heterogeneous network refers to that macrocell lower floor has also disposed Microcell.Like long-distance radio frequency unit (RRH), femto base station (PicoeNB), Home eNodeB (Home eNB) and relay base station (relay eNB).Typically heterogeneous network has two kinds of deployment way.A kind of is macrocell (macro cell)+home base station cells (femto cell), and another kind is macro cell+ picocell (pico cell) or relaying sub-district (relay cell).The introducing of Microcell has caused more cell border areas, thereby causes extra interference.Power imbalance between macrocell and the Microcell causes particularly serious disturbance to the UE that is in cell border areas.All there is the serious disturbance problem in above-mentioned two kinds of deployment way.
In the deployment way of macro cell+pico cell or relay cell, disturb and mainly come from distributed area expansion (range expansion).Range expansion uses the reference signal receiving intensity (RSRP) that is different from the tradition access in order to alleviate the macro base station burden.Specifically, UE is when judging access macrocell or Microcell, at the signal strength signal intensity RSRP from Microcell
MicroA side-play amount of last increase (bias), bias is a positive number, bias is normally disposed by upper layer device, and generally change.RSRP
MicroLast increase bias again with signal strength signal intensity RSRP from macrocell
MacroRelatively, if RSRP
Micro+ bias>=RSRP
Macro, then UE selects to insert Microcell; Otherwise UE selects to insert macrocell.
Use range expansion technology, the UE in the accompanying drawing 1 in the Microcell extended region can suffer serious interference.Its reason is, comes from the one hand from the weakening of Microcell signal receiving strength, and comes from the enhancing from the macrocell interference signal on the other hand.The result is in the possibility that UE in the Microcell extended region scope can not correctly receive signal to be increased greatly, has further caused throughput of system decline.
How effectively to alleviate and even eliminate Microcell and introduce the key that the interference bring especially improves the LTE-advanced systematic function, improves throughput.
Solution of the prior art is the time domain expansion of Release8/9 based on the ICIC of passback, uses ABS usually.ABS refers to that mainly macro base station sends downlink physical control channel (PDCCH) and is almost empty subframe, to reduce the down control channel interference to the user (pico UE) of Microcell.PDCCH only contains reference signal (CRS) and necessary control information among the ABS, and downlink physical shared channel (PDSCH) part still keeps the transmission of CRS.
In view of serious disturbance problem under the heterogeneous network; When adopting ABS to alleviate macro base station to the interference of the control channel of little base station one side; The ABS configuration that macro base station one side has done possibly can't be satisfied the dispatching requirement of little base station one side; Caused the time delay of abs mode adjustment between macro base station and the little base station, and the decline of throughput.
Summary of the invention
The method of adjustment of ABS in embodiment of the invention proposition and a kind of heterogeneous network shortens the time delay of abs mode adjustment between macro base station and the little base station, and improves the throughput of whole system.
The embodiment of the invention also proposes and a kind of system that adjusts ABS in the heterogeneous network, shortens the time delay of abs mode adjustment between macro base station and the little base station, and improves the throughput of whole system.
The technical scheme of the embodiment of the invention is following:
The method of adjustment of gap frame almost in a kind of heterogeneous network, this method comprises:
Interference user is selected to receive based on the reference signal receiving intensity RSRP of user UE feedback in little base station;
According to waiting to dispatch the number that receives interference user, judge that existing almost gap frame ABS can not satisfy to wait to dispatch the demand that receives interference user, wait to dispatch the information that receives interference user to the macro base station feedback;
Macro base station is according to waiting to dispatch the information adjustment ABS that receives interference user.
Said RSRP based on the UE feedback selects comprised by interference user: select to satisfy RSRP
MacroWith RSRP
MicroDifference more than or equal to RSRP
ThresholdReceive interference user, RSRP
MacroBe the RSRP that received from macrocell by interference user, RSRP
MicroBe the RSRP that received from Microcell by interference user, RSRP
ThresholdBe preset threshold value.
Said basis is waited to dispatch the number that receives interference user and judged that existing ABS can not satisfy to wait to dispatch and comprised by the demand of interference user: wait to dispatch the carrying greater than downlink physical control channel PDCCH of the number that receives interference user, then existing ABS can not satisfy and waits to dispatch the demand that receives interference user.
The said feedback to macro base station comprised by the information of interference user, in load information, waits to dispatch the information that receives interference user to the macro base station feedback;
Or, in gap frame state information, wait to dispatch the information that receives interference user to the macro base station feedback;
Or, in newly-built message, wait to dispatch the information that receives interference user to the macro base station feedback.
Said wait to dispatch comprised by the information of interference user: the number that needs use ABS with wait to dispatch the data to be transmitted amount that receives interference user.
Said macro base station comprises according to waiting to dispatch the information adjustment ABS that receives interference user: wait to dispatch the data to be transmitted amount that receives interference user and use the number of ABS to obtain the average data to be transmitted amount of needs use ABS divided by needs; Need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, macro base station sends the abs mode adjustment information through X2 interface to little base station.
Said wait to dispatch comprised by the information of interference user: wait to dispatch the number that receives interference user and wait to dispatch the data to be transmitted amount that receives interference user.
Said macro base station comprises according to waiting to dispatch the information adjustment ABS that receives interference user: calculate the ABS that needs use according to waiting to dispatch the number that receives interference user;
Receive the data to be transmitted amount of interference user to use the number of ABS to obtain needing to use the average data to be transmitted amount of ABS divided by needs; Need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, macro base station sends the abs mode adjustment information through X2 interface to little base station.
The said ABS that need to use equal to wait to dispatch receive interference user number divided by reference value;
When calculating first needed to use the number of ABS, reference value was confirmed according to user's sign;
When non-calculating first needed to use the number of ABS, reference value equaled number of users that PDCCH on average carries in last subframe.
A kind of almost system of gap frame that adjusts in the heterogeneous network, said device comprises:
Little base station, the reference signal receiving intensity RSRP that feeds back based on user UE selects to receive interference user; According to waiting to dispatch the number that receives interference user, judge that existing almost gap frame ABS can not satisfy to wait to dispatch the demand that receives interference user, wait to dispatch the information that receives interference user to the macro base station feedback;
Macro base station, what receive that little base station sends waits to dispatch the information that receives interference user, and according to waiting to dispatch the information adjustment ABS that receives interference user.
Said little base station is further used for, and selects to satisfy RSRP
MacroWith RSRP
MicroDifference more than or equal to RSRP
ThresholdReceive interference user, RSRP
MacroBe the RSRP that received from macrocell by interference user, RSRP
MicroBe the RSRP that received from Microcell by interference user, RSRP
ThresholdBe preset threshold value.
Said little base station is further used for, and judges and to wait to dispatch the carrying greater than downlink physical control channel PDCCH of the number that receives interference user, and then existing ABS can not satisfy and waits to dispatch the demand that receives interference user.
Said little base station is further used for, and in load information, waits to dispatch the information that receives interference user to the macro base station feedback;
Or, in gap frame state information, wait to dispatch the information that receives interference user to the macro base station feedback;
Or, in newly-built message, wait to dispatch the information that receives interference user to the macro base station feedback.
Said macro base station is further used for; Use the number of ABS to obtain needing to use the average data to be transmitted amount of ABS by waiting to dispatch the data to be transmitted amount that receives interference user divided by needs; Need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, and send the abs mode adjustment information to little base station through X2 interface.
Said macro base station is further used for, according to waiting to dispatch the ABS that the number that receives interference user calculates needs use; Use the number of ABS to obtain needing to use the average data to be transmitted amount of ABS by the data to be transmitted amount that receives interference user divided by needs; Need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, and send the abs mode adjustment information to little base station through X2 interface.
From technique scheme, can find out; In embodiments of the present invention; Little base station is selected to receive interference user based on the RSRP of UE feedback, according to waiting to dispatch the number that receives interference user, judges that existing almost gap frame ABS can not satisfy to wait to dispatch the demand that receives interference user; Then wait to dispatch the information that receives interference user to the macro base station feedback, macro base station is according to waiting to dispatch the information adjustment ABS that receives interference user.When macro base station adjustment ABS configuration, not only consider the situation of macro base station self, further contemplate and wait to dispatch the situation that receives interference user.The ABS that is made like this disposes, and has satisfied the demand of little base station side, has shortened the time delay of abs mode adjustment between macro base station and the little base station, and has taken all factors into consideration the throughput of system that increase the brought profit of ABS number, thereby has improved the throughput of whole system.
Description of drawings
Fig. 1 is the UE that is in extended area in the prior art sketch map that is interfered;
Fig. 2 is the method for adjustment schematic flow sheet of ABS in the embodiment of the invention heterogeneous network;
Fig. 3 is the method for adjustment idiographic flow sketch map of ABS in the embodiment of the invention heterogeneous network;
Fig. 4 is the system configuration sketch map of ABS in the embodiment of the invention adjustment heterogeneous network.
Embodiment
For making the object of the invention, technical scheme and advantage express clearlyer, the present invention is remake further detailed explanation below in conjunction with accompanying drawing and specific embodiment.
In embodiments of the present invention, when definite user for receiving interference user, the information that receives interference user is waited to dispatch to the macro base station feedback in then little base station, so that macro base station when adjustment ABS configuration, is considered the concrete condition of little base station.Like this; When macro base station adjustment ABS configuration; Come correspondingly to adjust the ABS number according to waiting to dispatch the number that receives interference user, adjusted ABS is used for the transmission that little base station side receives the interference user data, has therefore shortened the time delay of abs mode adjustment between macro base station and the little base station; And then judge whether increase to distribute ABS according to the data to be transmitted amount, thus taken all factors into consideration the throughput of system that increase the brought profit of ABS number, satisfied the demand of little base station side, improved the throughput of whole system.
Referring to accompanying drawing 2 are method of adjustment schematic flow sheets of ABS in the heterogeneous network, specifically may further comprise the steps:
If macro base station is numbered 0, little base station is numbered i=1,2 ..., N.K the user that distributing in the sub-district, its set is designated as Ω, and Ω=Ω
0∪ Ω
1∪ ... ∪ Ω
N, Ω wherein
0For being gathered by the UE of macro base station service, its UE number is made as K
0Ω
i(i=1,2 ..., N) being UE set through i little base station services, its UE number is made as K
iThe normal transmission power of macro base station is P
ENB, the normal transmission power of little base station is P
Pico, therefore the transmitting power of i node is P
i, then have
Path loss between i node (represent macro base station during i=0, little base station i o'clock is represented in i ≠ 0) and j the user (j ∈ Ω) is expressed as h
I, j
All UE measuring reference signals received powers.For each UEj (j=1,2 ..., K), its Connection Service sub-district point is i, i.e. j ∈ Ω
i, then the Reference Signal Received Power of its measurement is RSRP
I, j=h
I, jP
i, other access node i ' in the macrocell of measurement (i '=1,2 ..., the Reference Signal Received Power of N and i ' ≠ i) is RSRP
I ', j=h
I ', jP
I 'All UE feedback is from the RSRP information of diverse access point, for each mobile subscriber equipment j (j=1,2 ..., K), separately RSRP information (from little base station, macro base station) is fed back to its access station.
Disturbed more serious UE promptly receive interference user be from the RSRP of macro base station with from the difference of the RSRP of little base station user, promptly greater than threshold value
RSRP wherein
ThresholdBe preset threshold value.RSRP generally speaking
ThresholdEqual zero.Interference user promptly is desirably in the user of ABS transmission data for needing to do to strengthen the user of interference coordination.
Receive to have in the interference user need the transmission data receive interference user interference user promptly to be dispatched.Wait to dispatch the carrying greater than PDCCH of the number that receives interference user, then existing ABS can not satisfy and waits to dispatch the demand that receives interference user.For 10M hertz bandwidth, PDCCH carries 9-10 at the most treats that scheduling receives interference user.Generally speaking, wait to dispatch the number that receives interference user, be specially prior art according to what user's sign was confirmed can to carry on the PDCCH.
Wait to dispatch the information that receives interference user and comprise that waiting to dispatch the number that receives interference user maybe need use the number of ABS, and wait to dispatch the data to be transmitted amount that receives interference user.
If the number that receives interference user is fed back to macro base station in little base station, then need macro base station to calculate the number that needs use ABS in such a way; If the number of ABS need to be used to macro base station feedback in little base station, then need the number that little base station calculated in such a way needs use ABS.
According to the number of waiting to dispatch the number calculating needs use ABS that receives interference user.
At first, need corresponding dispatching algorithm for example the equitable proportion algorithm obtain waiting to dispatch the essential information of interference user, wait that the essential information of dispatching interference user comprises the number that receives interference user, receives the data to be transmitted amount of interference user.
Need to use the number of ABS to calculate according to following mode.
For example, when the number of ABS need is used in calculating first, wait to dispatch the number that receives interference user and equal to need to use the number of ABS divided by reference value, reference value is the maximum bearing capacity of PDCCH, and reference value is confirmed according to user's sign.For the bandwidth of 10M hertz, the reference value maximum is 9 or 10.
If not calculating first needs to use the number of ABS, at first calculating needs the number of users that PDCCH on average carries.The average bearing capacity of PDCCH according in preceding once several subframes is worth as a reference, and promptly the PDCCH number of users of on average carrying equals number of users that PDCCH on average carries in last subframe.Wait to dispatch number of users that the number that receives interference user on average carries divided by a PDCCH and equal to need to use the number of ABS.
The information that receives interference user is waited to dispatch to the macro base station feedback in little base station.Little base station receives the information of interference user that three kinds of modes are arranged to the macro base station feedback.A kind of mode is: little base station with the X2 interface of macro base station on usually can feedback load information (load information), in load information, increase new IE, the content of IE promptly waits to dispatch the information that receives interference user.The second way is: little base station with the X2 interface of macro base station on can feed back ABS state information (DL ABS Status information) usually; In ABS Statusinformation, increase new IE, the content of IE promptly waits to dispatch the information that receives interference user.The third mode is: increase newly-built message (ABS allocation reference), the information that receives interference user is waited to dispatch to the macro base station feedback in little base station in newly-built message.
Macro base station waits to dispatch the information adjustment ABS that receives interference user according to each little base station; The ABS that increases newly brings more throughput of system profit; Satisfied the demand of little base station side; Shorten the time delay of the abs mode adjustment between macro base station and the little base station accordingly, and then improved the throughput that comprises macro base station and little base station whole system.
Specify technical scheme of the present invention below in conjunction with accompanying drawing 3.
Interference user number on step 301, little base station each subframe of statistics.
Little base station is to monitor in the sub-district in real time.According to corresponding dispatching algorithm for example the equitable proportion algorithm obtain receiving the essential information of interference user.And receiving to confirm between interference user to treat that scheduling receives interference user.The essential information of waiting to dispatch interference user comprises waits to dispatch the number that the number that receives interference user maybe need use ABS, and the corresponding index of data volume waiting for transmission.Calculate the number that needs use ABS according to waiting to dispatch the number that receives interference user, detailed process is referring to step 202.
Judgement need be fed back to macro base station, and then execution in step 303; Otherwise, execution in step 301.Wait to dispatch the carrying greater than PDCCH of the number that receives interference user, then existing ABS can not satisfy and waits to dispatch the demand that receives interference user, then need feed back to macro base station; Otherwise, wait to dispatch the carrying of the number that receives interference user smaller or equal to PDCCH, then need not to feed back to macro base station.
The index question blank 1 (only as embodiment for reference) corresponding according to data volume waiting for transmission obtains data volume waiting for transmission.
The index value that table 1 ABS data to be transmitted amount is corresponding
| Index | Buffer?Size(BS)value[bytes] | Index | Buffer?Size(BS)value[bytes] |
| 0 | BS＝0 | 32 | 4940＜BS＜＝6074 |
| 1 | 0＜BS＜＝10 | 33 | 6074＜BS＜＝7469 |
| 2 | 10＜BS＜＝13 | 34 | 7469＜BS＜＝9185 |
| 3 | 13＜BS＜＝16 | 35 | 9185＜BS＜＝11294 |
| 4 | 16?BS＜＝19 | 36 | 11294＜BS＜＝13888 |
| 5 | 19＜BS＜＝23 | 37 | 13888＜BS＜＝17077 |
| 6 | 23＜BS＜＝29 | 38 | 17077＜BS＜＝20999 |
| 7 | 29＜BS＜＝35 | 39 | 20999＜BS＜＝25822 |
| 8 | 35＜BS＜＝43 | 40 | 25822＜BS＜＝31752 |
| 9 | 43＜BS＜＝53 | 41 | 31752＜BS＜＝39045 |
| 10 | 53＜BS＜＝65 | 42 | 39045＜BS＜＝48012 |
| 11 | 65＜BS＜＝80 | 43 | 48012＜BS＜＝59039 |
| 12 | 80＜BS＜＝98 | 44 | 59039＜BS＜＝72598 |
| 13 | 98＜BS＜＝120 | 45 | 72598＜BS＜＝89272 |
| 14 | 120＜BS＜＝147 | 46 | 89272＜BS＜＝109774 |
| 15 | 147＜BS＜＝181 | 47 | 109774＜BS＜＝134986 |
| 16 | 181＜BS＜＝223 | 48 | 134986＜BS＜＝165989 |
| 17 | 223＜BS＜＝274 | 49 | 165989＜BS＜＝204111 |
| 18 | 274＜BS＜＝337 | 50 | 204111＜BS＜＝250990 |
| 19 | 337＜BS＜＝414 | 51 | 250990＜BS＜＝308634 |
| 20 | 414＜BS＜＝509 | 52 | 308634＜BS＜＝379519 |
| 21 | 509＜BS＜＝625 | 53 | 379519＜BS＜＝466683 |
| 22 | 625＜BS＜＝769 | 54 | 466683＜BS＜＝573866 |
| 23 | 769＜BS＜＝945 | 55 | 573866＜BS＜＝705666 |
| 24 | 945＜BS＜＝1162 | 56 | 705666＜BS＜＝867737 |
| 25 | 1162＜BS＜＝1429 | 57 | 867737＜BS＜＝1067031 |
| 26 | 1429＜BS＜＝1757 | 58 | 1067031＜BS＜＝1312097 |
| 27 | 1757＜BS＜＝2161 | 59 | 1312097＜BS＜＝1613447 |
| 28 | 2161＜BS＜＝2657 | 60 | 1613447＜BS＜＝1984009 |
| 29 | 2657＜BS＜＝3267 | 61 | 1984009＜BS＜＝2439678 |
| 30 | 3267＜BS＜＝4017 | 62 | 2439678＜BS＜＝3000000 |
| 31 | 4017＜BS＜＝4940 | 63 | BS＞3000000 |
Feed back to macro base station through X2 interface step 303, little base station.
Little base station waits to dispatch the information that receives interference user through the X2 interface between little base station and the macro base station to the macro base station feedback.There are three kinds of modes little base station referring to step 203 to the macro base station feedback.Wait to dispatch the information that receives interference user and comprise that waiting to dispatch the number that receives interference user maybe need use the number of ABS, and the data to be transmitted amount that receives interference user.
Macro base station receives the feedback that send each little base station, and in view of little base station number of cell coverage area, adjustment needs the regular hour, therefore in one-period, waits for adjustment.
Need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, then execution in step 306; Otherwise, execution in step 304.
The data to be transmitted amount of need using the average data to be transmitted amount of ABS to equal to wait to dispatch to receive interference user is used the number of ABS divided by needs, and the data to be transmitted amount that receives interference user of waiting to dispatch here is meant that macro base station receives the data to be transmitted amount sum that receives interference user of all little base stations.So just can obtain using the average data to be transmitted amount of ABS at needs.The average descending data to be transmitted amount of macro base station on existing subframe equals the number of the summation of all descending data to be transmitted amounts of macro base station divided by existing subframe.
Needs are used average data to be transmitted amount of ABS and the average descending data to be transmitted amount of macro base station on existing subframe relatively; If need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, then macro base station increases the number of ABS; If need to use the average data to be transmitted amount of ABS smaller or equal to the average descending data to be transmitted amount of macro base station on existing subframe, then macro base station does not increase the number of ABS.
Macro base station comprehensively judges whether to distribute ABS from the angle of throughput of system, and sends the ABS adjustment information through X2 interface to little base station.Specifically how adjusting ABS is not key point of the present invention, therefore no longer specifies.
Step 301 is to the processing procedure of 303 little base stations; Step 304 is to 306 being processing procedures of macro base station.Step 301 is described by interference user to 306 to waiting to dispatch; What macro base station can obtain little base station feedback like this waits to dispatch the information that receives interference user, make macro base station when decision ABS configuration, consider by interfered cell need be on ABS the demand of transmission user.
Referring to accompanying drawing 4 are system configuration sketch mapes of gap frame almost in the adjustment heterogeneous network, comprising:
Little base station, the reference signal receiving intensity RSRP that feeds back based on user UE selects to receive interference user; According to waiting to dispatch the number that receives interference user, judge that existing almost gap frame ABS can not satisfy to wait to dispatch the demand that receives interference user, wait to dispatch the information that receives interference user to the macro base station feedback;
Macro base station, what receive that little base station sends waits to dispatch the information that receives interference user, and according to waiting to dispatch the information adjustment ABS that receives interference user.
In addition, little base station is further used for, and selects to satisfy RSRP
MacroWith RSRP
MicroDifference more than or equal to RSRP
ThresholdReceive interference user, RSRP
MacroBe the RSRP that received from macrocell by interference user, RSRP
MicroBe the RSRP that received from Microcell by interference user, RSRP
ThresholdBe preset threshold value.Detailed process is referring to step 201.
Little base station judges waits to dispatch the carrying greater than PDCCH of the number that receives interference user, and then existing ABS can not satisfy and waits to dispatch the demand that receives interference user.
The information that receives interference user is waited to dispatch to the macro base station feedback in little base station in load information; Or in gap frame state information, wait to dispatch the information that receives interference user to the macro base station feedback; Or in newly-built message, wait to dispatch the information that receives interference user to the macro base station feedback.
Macro base station is further used for; Use the number of ABS to obtain needing to use the average data to be transmitted amount of ABS by waiting to dispatch the data to be transmitted amount that receives interference user divided by needs; Need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, and send the abs mode adjustment information to little base station through X2 interface.Macro base station is further used for, according to waiting to dispatch the ABS that the number that receives interference user calculates needs use; Use the number of ABS to obtain needing to use the average data to be transmitted amount of ABS by the data to be transmitted amount that receives interference user divided by needs; Need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, and send the abs mode adjustment information to little base station through X2 interface.Specifically referring to step 203.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. the method for adjustment of gap frame almost in the heterogeneous network is characterized in that this method comprises:
Interference user is selected to receive based on the reference signal receiving intensity RSRP of user UE feedback in little base station;
According to waiting to dispatch the number that receives interference user, judge that existing almost gap frame ABS can not satisfy to wait to dispatch the demand that receives interference user, wait to dispatch the information that receives interference user to the macro base station feedback;
Macro base station is according to waiting to dispatch the information adjustment ABS that receives interference user.
2. according to the method for adjustment of gap frame almost in the said heterogeneous network of claim 1, it is characterized in that said RSRP based on the UE feedback selects comprised by interference user: select to satisfy RSRP
MacroWith RSRP
MicroDifference more than or equal to RSRP
ThresholdReceive interference user, RSRP
MacroBe the RSRP that received from macrocell by interference user, RSRP
MicroBe the RSRP that received from Microcell by interference user, RSRP
ThresholdBe preset threshold value.
3. according to the method for adjustment of gap frame almost in the said heterogeneous network of claim 1; It is characterized in that; Said basis is waited to dispatch the number that receives interference user and judged that existing ABS can not satisfy to wait to dispatch and comprised by the demand of interference user: wait to dispatch the carrying greater than downlink physical control channel PDCCH of the number that receives interference user, then existing ABS can not satisfy and waits to dispatch the demand that receives interference user.
4. according to the method for adjustment of gap frame almost in the said heterogeneous network of claim 1, it is characterized in that, saidly comprised by the information of interference user, in load information, wait to dispatch the information that receives interference user to the macro base station feedback to the macro base station feedback;
Or, in gap frame state information, wait to dispatch the information that receives interference user to the macro base station feedback;
Or, in newly-built message, wait to dispatch the information that receives interference user to the macro base station feedback.
5. according to the method for adjustment of gap frame almost in the said heterogeneous network of claim 1 claim, it is characterized in that, said wait to dispatch comprised by the information of interference user: the number that needs use ABS with wait to dispatch the data to be transmitted amount that receives interference user.
6. according to the method for adjustment of gap frame almost in the said heterogeneous network of claim 5; It is characterized in that; Said macro base station comprises according to waiting to dispatch the information adjustment ABS that receives interference user: wait to dispatch the data to be transmitted amount that receives interference user and use the number of ABS to obtain the average data to be transmitted amount of needs use ABS divided by needs; Need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, macro base station sends the abs mode adjustment information through X2 interface to little base station.
7. according to the method for adjustment of gap frame almost in the said heterogeneous network of claim 1 claim; It is characterized in that, said wait to dispatch comprised by the information of interference user: wait to dispatch the number that receives interference user and wait to dispatch the data to be transmitted amount that receives interference user.
8. according to the method for adjustment of gap frame almost in the said heterogeneous network of claim 7; It is characterized in that said macro base station comprises according to waiting to dispatch the information adjustment ABS that receives interference user: calculate the ABS that needs use according to waiting to dispatch the number that receives interference user;
Receive the data to be transmitted amount of interference user to use the number of ABS to obtain needing to use the average data to be transmitted amount of ABS divided by needs; Need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, macro base station sends the abs mode adjustment information through X2 interface to little base station.
9. according to the method for adjustment of gap frame almost in claim 5 or the 8 said heterogeneous networks, it is characterized in that, the said ABS that needs to use equal to wait to dispatch receive interference user number divided by reference value;
When calculating first needed to use the number of ABS, reference value was confirmed according to user's sign;
When non-calculating first needed to use the number of ABS, reference value equaled number of users that PDCCH on average carries in last subframe.
10. adjust in the heterogeneous network the almost system of gap frame for one kind, it is characterized in that said device comprises:
Little base station, the reference signal receiving intensity RSRP that feeds back based on user UE selects to receive interference user; According to waiting to dispatch the number that receives interference user, judge that existing almost gap frame ABS can not satisfy to wait to dispatch the demand that receives interference user, wait to dispatch the information that receives interference user to the macro base station feedback;
Macro base station, what receive that little base station sends waits to dispatch the information that receives interference user, and according to waiting to dispatch the information adjustment ABS that receives interference user.
11. according to the system of gap frame almost in the said adjustment heterogeneous network of claim 10, it is characterized in that said little base station is further used for, select to satisfy RSRP
MacroWith RSRP
MicroDifference more than or equal to RSRP
ThresholdReceive interference user, RSRP
MacroBe the RSRP that received from macrocell by interference user, RSRP
MicroBe the RSRP that received from Microcell by interference user, RSRP
ThresholdBe preset threshold value.
12. according to the system of gap frame almost in the said adjustment heterogeneous network of claim 10; It is characterized in that; Said little base station is further used for; Judge and to wait to dispatch the carrying of the number that receives interference user that then existing ABS can not satisfy and waits to dispatch the demand that receives interference user greater than downlink physical control channel PDCCH.
13. according to the system of gap frame almost in the said adjustment heterogeneous network of claim 10, it is characterized in that said little base station is further used for, in load information, wait to dispatch the information that receives interference user to the macro base station feedback;
Or, in gap frame state information, wait to dispatch the information that receives interference user to the macro base station feedback;
Or, in newly-built message, wait to dispatch the information that receives interference user to the macro base station feedback.
14. according to the system of gap frame almost in the said adjustment heterogeneous network of claim 10; It is characterized in that; Said macro base station is further used for; Use the number of ABS to obtain needing to use the average data to be transmitted amount of ABS by waiting to dispatch the data to be transmitted amount that receives interference user divided by needs, need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, and send the abs mode adjustment information to little base station through X2 interface.
15. according to the system of gap frame almost in the said adjustment heterogeneous network of claim 10, it is characterized in that said macro base station is further used for, calculate and need the ABS that uses according to waiting to dispatch the number that receives interference user; Use the number of ABS to obtain needing to use the average data to be transmitted amount of ABS by the data to be transmitted amount that receives interference user divided by needs; Need to use the average data to be transmitted amount of ABS greater than the average descending data to be transmitted amount of macro base station on existing subframe, and send the abs mode adjustment information to little base station through X2 interface.
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