CN102752863B - Method for acquiring NeNB (Home eNode B) ABS (Almost Blank Subframe) configuration modes - Google Patents
Method for acquiring NeNB (Home eNode B) ABS (Almost Blank Subframe) configuration modes Download PDFInfo
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- CN102752863B CN102752863B CN201210213097.5A CN201210213097A CN102752863B CN 102752863 B CN102752863 B CN 102752863B CN 201210213097 A CN201210213097 A CN 201210213097A CN 102752863 B CN102752863 B CN 102752863B
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- abs
- configuration mode
- channel quality
- cqi
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Abstract
The invention discloses a method for acquiring NeNB (Home eNode B) ABS (Almost Blank Subframe) configuration modes. The method comprises the following steps of: carrying out a channel quality indication measurement on resources which are possibly protected by ABSs in all the ABS configuration modes through MUE (Macro User Equipment) with a relatively low broadband CQI (Channel Quality Indicator) value reported to an MeNB under the indication of the MeNB; detecting the MUE interfered by CSG (Closed Subscriber Group)-HeNB according to relatively high difference between broadband CQI values fed back under the channel quality indicator measurement which is carried out on the resources protected through the ABSs and broadband CQI values fed back under the channel quality indicator measurement which is carried out on the resources which are not protected through the ABSs; and then carrying out limited channel quality indicator measurement on other subframes by the interfered MUE under the indication of the MeNB, thus finally acquiring the ABS configuration mode of the CSG-HeNB according to the relatively large difference between the broadband CQI values of the resources protected through the ABSs and the broadband CQI values of the resources which are not protected by the ABSs.
Description
Technical field
The invention belongs to wireless communication technology field, be specifically related to based on Home eNodeB (Home eNode B, HeNB) in LTE-A (Long Term Evolution Advanced) heterogeneous network Inter-Cell Interference Coordination technology, macro base station (Macro eNode B, MeNB) grand user (the Macro User Equipment by Home eNodeB interference is detected, MUE) method, and the method obtaining Home eNodeB ABS (Almost Blank Subframe) configuration mode.
Background technology
In Cellular Networks, the demand of miscellaneous service amount exponentially increases.LTE-A suggestion uses various advanced technology to improve the performance of whole network further, as carrier aggregation, high-order mimo (Multiple Input Multiple Output) and multi-point cooperative etc.But these advanced technologies (as indoor) when Signal to Interference plus Noise Ratio is lower can not obtain larger performance improvement 0, specifically can list of references: David Lopez-Perez, etc, Enhanced Inter-Cell interference Coordination Challenges in Heterogeneous Networks, IEEE wireless communications magazine, June 2011.
Nearest investigation display, the following telephone service of 50% and the data service of 70% will be carried out in indoor.Mobile operator wants to win the market more share, just must support a large amount of indoor business.Due to penetration loss, even if increase the input of macro base station, indoor signal quality also can not get improving well, and indoor user often can not get good any wireless network services.But the important index of forth generation mobile communication one is exactly for the user in any place provides consistent broadband service to experience.
For above problem, be the most promising current solution at indoor deployment low-power, undersized Home eNodeB.Because HeNB adopts to dispose with mode frequently, and the HeNB of pattern only provides wireless data transfer services to CSG user under CSG (Closed Subscriber Group), therefore, CSG-HeNB can cause serious descending interference to the MUE be in its coverage.
Point out in motion " 3GPP; R1-104547; Time Shifting and Almost Blank Subframe for Intercell Interference; MediaTek Inc.August; 2010 ", CSG-HeNB can be eliminated by the ABS subframe reasonably configuring some in CSG-HeNB downlink radio frame to the descending interference of the MUE being positioned at its coverage.The basic ideas of this Inter-Cell Interference Coordination technology based on ABS subframe are: the part subframe in CSG-HeNB downlink frame is configured to ABS subframe; clash to avoid CSG-HeNB cell downlink information and the descending control information of macrocell and system information; and MeNB is dispatched in the resource protected by ABS subframe be subject to the MUE of CSG-HeNB interference, thus realize the interference coordination of minizone.Obviously, to ensure between MUE and the MeNB by CSG-HeNB interference reliably Wireless Data Transmission, MeNB must the disturbed MUE of Timeliness coverage the ABS configuration mode of Obtaining Accurate CSG-HeNB.ABS configuration mode comprises position and the quantity of ABS subframe in configuration cycle of ABS and each configuration cycle.3GPP decides through discussion between MeNB and HeNB does not exist X2 interface, and therefore, MeNB can not directly carry out Signalling exchange to obtain the ABS configuration mode of CSG-HeNB with CSG-HeNB.
Summary of the invention
X2 interface is there is not in the present invention in order to solve between MeNB and HeNB, the MeNB caused can not directly carry out Signalling exchange to obtain the problem of the ABS configuration mode of CSG-HeNB with CSG-HeNB, first proposed a kind of macro base station and detect the grand user method disturbed by Home eNodeB, specifically comprise the steps:
Step 1: design several ABS configuration mode in advance according to communication environment, described several ABS configuration mode meets the subframe that all configuration modes at least exist a same sequence number and is all ABS subframe;
The first broadband CQI (Channel Quality Indicator) the value CQI reported is measured in the channel quality instruction that step 2:MeNB monitors all MUE in macrocell
0, when the first broadband CQI value CQI reported is measured in the channel quality instruction of a certain MUE
0during≤α, MeNB indicates described MUE can done channel quality instruction measurement by the resource of all ABS configuration mode protections, and described channel quality instruction is measured as the instruction of limited channel quality and measures.Then, the second broadband CQI value CQI reported is measured in the limited channel quality instruction utilizing described MUE to do
2the 3rd broadband CQI value CQI measured is indicated with the last subnormal channel quality of described MUE
3value is compared, if CQI
2-CQI
3during>=β, then described MUE is subject to CSG-HeNB interference, and wherein, α is the first threshold pre-set, and β is the Second Threshold pre-set.
In order to solve the problem, the invention allows for a kind of method obtaining Home eNodeB ABS configuration mode, specifically comprising the steps:
Step 1: design several ABS configuration mode in advance according to communication environment, it is ABS subframe that described several ABS configuration mode meets the subframe that at least there is a same sequence number;
The first broadband CQI (Channel Quality Indicator) the value CQI reported is measured in the channel quality instruction that step 2:MeNB monitors all MUE in macrocell
1, when the first broadband CQI value CQI reported is measured in the channel quality instruction of a certain MUE
1during≤α, MeNB indicates described MUE can done channel quality instruction measurement by the resource of all ABS configuration mode protections, and described channel quality instruction is measured as the instruction of limited channel quality and measures.Then, the second broadband CQI value CQI reported is measured in the limited channel quality instruction utilizing described MUE to do
2the 3rd broadband CQI value CQI measured is indicated with the last subnormal channel quality of described MUE
3value is compared, if CQI
2-CQI
3during>=β, then described MUE is subject to CSG-HeNB interference, and wherein, α is the first threshold pre-set, and β is the Second Threshold pre-set;
Step 3: step 2 detects that described MUE is subject to the interference of CSG-HeNB; then MeNB indicates described MUE to choose arbitrarily two kinds in all possible ABS configuration mode; be designated as the first configuration mode and the second configuration mode; for selected two kinds of ABS configuration mode first configuration modes and the second configuration mode; the resource can not protected by the ABS subframe of the first configuration mode only being protected by the ABS subframe of the second pattern configurations pattern is done the instruction of limited channel quality to measure, measure with the instruction of this limited channel quality the 4th broadband CQI value CQI reported
4the second broadband CQI value CQI that value and step 2 obtain
2value is compared, if CQI
2-CQI
4during>=γ, then get rid of the second pattern configurations pattern, otherwise get rid of the first configuration mode, wherein, γ is the 3rd threshold value pre-set;
Step 4: repeat step 3, until the number of all possible ABS configuration mode is 1, then this ABS configuration mode is the ABS configuration mode of the CSG-HeNB that MeNB obtains.
Further, described several ABS configuration mode has identical ABS configuration cycle and different ABS number of sub-frames.
Beneficial effect of the present invention: the present invention may done channel quality instruction measurement by the resource of the ABS subframe protection in all ABS configuration modes by MeNB instruction to the MUE that the broadband CQI value that MeNB reports is less, to utilize in the resource protected by ABS subframe the channel quality instruction the done broadband CQI value of measuring feedback with in the resource do not protected by ABS subframe the channel quality that does indicate and measures the larger difference of the broadband CQI value fed back, effectively detect the MUE being subject to CSG-HeNB and disturbing in time; Then MeNB indicates the MUE be interfered to do limited channel quality instruction measurement in other subframe again; again utilize the difference that the broadband CQI value of the resource protected by ABS subframe is larger with the broadband CQI value of the resource do not protected by ABS subframe; lack the condition of X2 interface between HeNB and MeNB under; MeNB is made to obtain the ABS configuration mode of CSG-HeNB exactly; thus make MeNB can in the ABS subframe configured by CSG-HeNB dispatch disturbed MUE in the resource protected, ensure the reliability of Wireless Data Transmission between disturbed MUE and MeNB.
Accompanying drawing explanation
Fig. 1 is that MeNB detects disturbed MUE and CSG-HeNBABS configuration mode schematic flow sheet.
Fig. 2 is the HeNB downlink frame schematic diagram of configuration ABS subframe.
Embodiment
Below in conjunction with accompanying drawing (Fig. 1, Fig. 2), the present invention is set forth in detail.
X2 interface is there is not between MeNB and HeNB, the MeNB caused can not directly carry out Signalling exchange to obtain the problem of the ABS configuration mode of CSG-HeNB with CSG-HeNB, the present invention first proposed a kind of macro base station and detects the grand user method disturbed by Home eNodeB, as shown in Figure 1, specifically comprise the steps:
Step 1: design several ABS configuration mode in advance according to communication environment, here, communication environment refers to the disturbance regime of current area, specifically can according to zones of different Physical Downlink Control Channel in protection macrocell, Physical Control Format Indicator Channel, physics HARQ (Hybrid Automatic Repeat reQuest) indicating channel, Physical Broadcast Channel, primary synchronization channel, auxiliary synchronization channel, the channels such as system information block type 1 and paging channel need to design several ABS configuration mode, the number of ABS configuration mode can set according to above-mentioned actual conditions, no longer describe in detail at this, suppose that several ABS configuration mode is specially N kind, can be designated as: P={p
0, p
1..., P
n-2, P
n-1.
Here, N kind ABS configuration mode meets the subframe that at least there is a same sequence number and is all ABS subframe, 0 work song frame as shown in Figure 2, namely
Wherein,
num (x) represents the number of ABS subframe in parameter x set.The present invention lists N=3 kind ABS configuration mode { p
0, p
1, p
2, be illustrated with bitmap below:
Pattern 0 (8,1) p
0=[10000000]
Pattern 1 (8,2) p
1=[10000100]
Pattern 2 (8,3) p
2=[10001100]
Wherein, (8, x) represent that in this pattern, the number of ABS subframe is x with 8 subframes for the cycle configures ABS subframe; " 0 " in square brackets represents conventional subframe, and " 1 " represents ABS subframe.
Here, N kind ABS configuration mode has identical ABS configuration cycle and different ABS number of sub-frames.
The the first broadband CQI value CQI reported is measured in the channel quality instruction that step 2:MeNB monitors all MUE in macrocell
1, when the first broadband CQI value CQI reported is measured in the channel quality instruction of a certain MUE
1during≤α; MeNB indicates described MUE can done channel quality instruction measurement by (as shown in Figure 2 MeNB downlink frame 0 work song frame) in the resource of all ABS configuration mode protections; described channel quality instruction is measured as the instruction of limited channel quality and measures, and the second broadband CQI value CQI reported is measured in the limited channel quality instruction then utilizing described MUE to do
2the 3rd broadband CQI value CQI measured is indicated with the last subnormal channel quality of described MUE
3value is compared, if CQI
2-CQI
3during>=β, then described MUE is subject to CSG-HeNB interference, and wherein, α is the first threshold pre-set, and β is the Second Threshold pre-set.
For the problems referred to above, the present invention also proposed a kind of method obtaining Home eNodeB ABS configuration mode based on the above method, and the basis of above-mentioned two steps also comprises the steps:
At this definition also initialization variable, CSG-HeNB all possible ABS configuration mode P
pos={ p
0, p
1..., P
n-2, P
n-1.
Step 3: step 2 detects that described MUE receives the interference of CSG-HeNB, then MeNB indicates described MUE at all possible ABS configuration mode P
posin choose arbitrarily two kinds, be designated as the first configuration mode p
i1with the second configuration mode p
i2.For selected two kinds of ABS configuration mode p
i1and p
i2, only by p
i2aBS subframe protection and not by p
i1the protection of ABS subframe subframe on do the instruction of limited channel quality and measure, measure with the instruction of each limited channel quality the 4th broadband CQI value CQI reported
4the second broadband CQI value CQI that value and step 2 obtain
2value is compared, if CQI
2-CQI
4during>=γ, then get rid of the second pattern configurations pattern p
i2, the ABS configuration mode P that so CSG-HeNB is possible
pos-{ p
i2; If CQI
2-CQI
4< γ, gets rid of the second configuration mode p
i1, the ABS configuration mode P that so CSG-HeNB is possible
pos-{ p
i1.Wherein, γ is the 3rd threshold value pre-set;
Step 4: repeat step 3, until the number of all possible ABS configuration mode is 1, then this ABS configuration mode is the ABS configuration mode of the CSG-HeNB that MeNB obtains.
Below with enumerate in step 13 kinds of ABS configuration mode { p
0, p
1, p
2describe the process that MeNB obtains Home eNodeB ABS configuration mode in detail for example:
The all possible ABS configuration mode of Step1:HeNB is P
pos={ p
0, p
1, p
2.At P
posin choose arbitrarily two configuration modes, that suppose to choose is p
0and p
1.For p
0and p
1two kinds of configuration modes, can only be configured pattern p in ABS configuration cycle 1
1aBS subframe protection and can not pattern p be configured
0the subframe of protection is MeNB downlink frame 5 work song frame, as shown in Figure 2.
Then MeNB indicates disturbed MUE to do limited channel quality instruction measurement at 5 work song frames, the broadband CQI value CQI fed back with this limited measurement
4with the second broadband CQI value CQI in step 2
2value is compared, if CQI
2-CQI
4>=γ, then get rid of pattern p
1, P
pos={ p
0, p
2; If CQI
2-CQI
4< γ, gets rid of pattern p
0, P
pos={ p
1, p
2.
Step2: if that Step1 eliminating is p
0, then now all possible ABS configuration mode of CSG-HeNB becomes P
pos={ p
1, p
2.For p
1and p
2two kinds of configuration modes, can only be configured pattern p in ABS configuration cycle 1
2aBS subframe protection and can not pattern p be configured
1the subframe of protection is MeNB downlink frame 4 work song frame, as shown in Figure 2.
Then MeNB indicates described MUE to do limited channel quality instruction measurement at 4 work song frames, measures the broadband CQI value CQI of feedback with the instruction of this restricting channel quality
4with the second broadband CQI value CQI in step 2
2value is compared, if CQI
2-CQI
4>=γ, then get rid of pattern p
2, P
pos={ p
1, so MeNB thinks that the ABS configuration mode of CSG-HeNB is p
1; If CQI
2-CQI
4< γ, gets rid of pattern p
1, P
pos={ p
2, so MeNB thinks that the ABS configuration mode of CSG-HeNB is p
2
If that Step1 gets rid of is p
1, then now all possible ABS configuration mode of CSG-HeNB becomes P
pos={ p
0, p
2.For p
0and p
2two kinds of configuration modes, can only be configured pattern p in ABS configuration cycle 1
2aBS subframe protection and can not pattern p be configured
1the subframe of protection is MeNB downlink frame 4 and 5 work song frame.So MeNB indicates described MUE to do the instruction of limited channel quality No. 4 or 5 work song frames again and measures.Because Step1 has obtained at the limited broadband CQI value CQI measuring feedback of 5 work song frames
4, therefore, need not repeat to do channel quality instruction and measure.Configuration mode p is got rid of by Step1
1known CQI
2-CQI
4>=γ, direct eliminating pattern p
2, P
pos={ p
0.So can determine that the ABS configuration mode of CSG-HeNB is p
0.
Those of ordinary skill in the art will appreciate that, embodiment described here is to help reader understanding's principle of the present invention, should be understood to that protection scope of the present invention is not limited to so special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combination of not departing from essence of the present invention according to these technology enlightenment disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.
Claims (4)
1. macro base station detects the grand user method by Home eNodeB interference, specifically comprises the steps:
Step 1: design several ABS configuration mode in advance according to communication environment, described several ABS configuration mode meets the subframe that all configuration modes at least exist a same sequence number and is all ABS subframe;
The the first broadband CQI value CQI reported is measured in the channel quality instruction that step 2:MeNB monitors all MUE in macrocell
1, when the first broadband CQI value CQI reported is measured in the channel quality instruction of a certain MUE
1during≤α, MeNB indicates described MUE can done channel quality instruction measurement by the resource of all ABS configuration mode protections, and described channel quality instruction is measured as the instruction of limited channel quality and measures; Then, the second broadband CQI value CQI reported is measured in the limited channel quality instruction utilizing described MUE to do
2the 3rd broadband CQI value CQI measured is indicated with the last subnormal channel quality of described MUE
3value is compared, if CQI
2-CQI
3during>=β, then described MUE is subject to CSG-HeNB interference, and wherein, α is the first threshold pre-set, and β is the Second Threshold pre-set.
2. macro base station according to claim 1 detects the grand user method by Home eNodeB interference, and it is characterized in that, the several ABS configuration mode described in step 1 has identical ABS configuration cycle and different ABS number of sub-frames.
3. obtain a method for Home eNodeB ABS configuration mode, specifically comprise the steps:
Step 1: design several ABS configuration mode in advance according to communication environment, it is ABS subframe that described several ABS configuration mode meets the subframe that at least there is a same sequence number;
The the first broadband CQI value CQI reported is measured in the channel quality instruction that step 2:MeNB monitors all MUE in macrocell
1, when the first broadband CQI value CQI reported is measured in the channel quality instruction of a certain MUE
1during≤α, MeNB indicates described MUE can done channel quality instruction measurement by the resource of all ABS configuration mode protections, and described channel quality instruction is measured as the instruction of limited channel quality and measures; Then, the second broadband CQI value CQI reported is measured in the limited channel quality instruction utilizing described MUE to do
2the 3rd broadband CQI value CQI measured is indicated with the last subnormal channel quality of described MUE
3value is compared, if CQI
2-CQI
3during>=β, then described MUE is subject to CSG-HeNB interference, and wherein, α is the first threshold pre-set, and β is the Second Threshold pre-set;
Step 3: step 2 detects that described MUE is subject to the interference of CSG-HeNB; then MeNB indicates described MUE to choose arbitrarily two kinds in all possible ABS configuration mode; be designated as the first configuration mode and the second configuration mode; for selected two kinds of ABS configuration mode first configuration modes and the second configuration mode; the resource can not protected by the ABS subframe of the first configuration mode only being protected by the ABS subframe of the second pattern configurations pattern is done the instruction of limited channel quality to measure, measure with the instruction of this limited channel quality the 4th broadband CQI value CQI reported
4the second broadband CQI value CQI that value and step 2 obtain
2value is compared, if CQI
2-CQI
4during>=γ, then get rid of the second configuration mode, otherwise get rid of the first configuration mode, wherein, γ is the 3rd threshold value pre-set;
Step 4: repeat step 3, until the number of all possible ABS configuration mode is 1, then this ABS configuration mode is the ABS configuration mode of the CSG-HeNB that MeNB obtains.
4. the method for acquisition Home eNodeB ABS configuration mode according to claim 3, is characterized in that, the several ABS configuration mode described in step 1 has identical ABS configuration cycle and different ABS number of sub-frames.
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|---|---|---|---|
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|---|---|---|---|
| CN201210213097.5A CN102752863B (en) | 2012-06-26 | 2012-06-26 | Method for acquiring NeNB (Home eNode B) ABS (Almost Blank Subframe) configuration modes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895936A (en) * | 2009-05-18 | 2010-11-24 | 中兴通讯股份有限公司 | Method and device for distributing control channel resources |
| CN101986586A (en) * | 2010-11-09 | 2011-03-16 | 中兴通讯股份有限公司 | Method and user equipment (UE) for measuring and feeding back channel quality |
| CN102098739A (en) * | 2011-01-28 | 2011-06-15 | 工业和信息化部电信传输研究所 | Method for increasing utilization ratio of resources, home base station, macro base station and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895936A (en) * | 2009-05-18 | 2010-11-24 | 中兴通讯股份有限公司 | Method and device for distributing control channel resources |
| CN101986586A (en) * | 2010-11-09 | 2011-03-16 | 中兴通讯股份有限公司 | Method and user equipment (UE) for measuring and feeding back channel quality |
| CN102098739A (en) * | 2011-01-28 | 2011-06-15 | 工业和信息化部电信传输研究所 | Method for increasing utilization ratio of resources, home base station, macro base station and system |
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