CN102917411A - Downlink static ICIC judgment method and base station - Google Patents
Downlink static ICIC judgment method and base station Download PDFInfo
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- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention relates to a downlink static ICIC (Internal Cell Interference Coordination) judgment method and base station. The method comprises the following steps: presetting a first threshold value and acquiring a second threshold value according to the number of switch cells and signal intensity of switch points; and when the relative signal intensity of a terminal user is larger than the first threshold value and the absolute signal intensity of the terminal user is larger than the second threshold value, then judging that the terminal user is located in a central area of the cell, otherwise, judging that the terminal user is located in the edge zone of the cell. As the relative signal intensity and the absolute signal intensity of the terminal user are used to judge that whether the terminal user is located in the central area or the edge zone, the terminal user avoids switching frequently between the center and the boundary of the cell, the transmitting power of the area where the user terminal is located can be adjusted according to the judgment situations, so that the problem of low throughout of the terminal user in the weakened coverage area is solved, and the experience and the feeling of the terminal user are improved.
Description
Technical field
The present invention relates to communication technical field, specifically the method for discrimination of descending static ICIC and base station.
Background technology
At present, at TDD_LTE (Time Division Duplexing_Long Term Evolution, the Long Term Evolution of time division duplex) the interference coordination technique ICIC between system's small area (Internal CellInterference Coordination, coordinating district interference) comprises static ICIC, semi-static ICIC and dynamic I CIC technology.ICIC realizes by user's scheduling and power division.Consider that Cell Center User and edge customer are in different channel circumstances, the co-channel interference degree that comes from adjacent cell is different, different on the customer flow impact, therefore by the user in the residential quarter is carried out the differentiation of position, divide the user in the residential quarter into Cell Center User and two set of Cell Edge User.System takes different strategy with Cell Edge User in frequency scheduling and power division to Cell Center User, to lower the co-channel interference of Cell Edge User, namely improve the channel quality of edge customer, promote the throughput of edge customer, and then promote the spectrum efficiency of edge customer.The main purpose of ICIC is throughput and the user's susceptibility by the lifting edge customer, and then promotes all user's susceptibilitys in the residential quarter.Because it is many that semi-static ICIC and dynamic ICIC relate to interactive information, the factors such as algorithm complexity also really do not realize and checking at present, and the validation test that static ICIC algorithm has been realized and carried out.
For descending static ICIC, its basic thought is " frequency band staggers+power division ".Frequency band staggers, and refers to distributing the collision of " edge band " and " edge band " that cause to stagger because of random frequency between the adjacent cell, to become " edge band " and " center frequency-band " collision.Because if more intense interference is arranged between the edge customer, interference that will whole network edge user is very large, allow " edge band " and " center frequency-band " to collide, auxiliary with power distribution strategies simultaneously, be exactly " center low-power, edge high power " briefly, just can effectively improve SINR (the Signal to Interference plus Noise Ratio of edge customer, Signal to Interference plus Noise Ratio), improve the flow of edge customer.But on the other hand, the transmitting power of central user reduces, if and and the other side promoted the edge customer collision of power, disturb to increase, thus the SINR of central user integral body in other words MCS (Meridian Control Signal, summit control signal) grade can descend to some extent.But, because the SINR of central user is relatively good, exchange edge flow for by sacrificial section center flow, promote the whole user's in residential quarter susceptibility, be very significant.
For descending static ICIC, the base station can be according to frequency resource and the power of the frequency band that distributes in conjunction with dispatching algorithm dynamic dispatching central user and edge customer.
Therefore, the key technology of descending static ICIC is exactly how to define Cell Center User and edge customer, namely how user area in the residential quarter is divided into Cell Center User and Cell Edge User.Present algorithm is the measurement control that issues the A3 event of ICIC by the base station to the terminal use, report the position attribution (center of housing estate or cell edge) of differentiating UE based on the relative threshold method in the A3 measurement report of ICIC by UE, then notify scheduler, carry out the distribution of frequency and power.This event is whether the difference by the signal strength signal intensity of the signal strength signal intensity of adjacent cell relatively and Serving cell satisfies this relative threshold and judge that the terminal use is in cell edge or center of housing estate.
Then in application, adopt the relative threshold method of above-mentioned A3 event to judge that the terminal use is in cell edge or center of housing estate, there are the following problems:
At urban area circumstance, the residential quarter is intensive, wireless signal is complicated, this residential quarter and its adjacent cell signal are in continuous frequent variations, and it is more violent therefore to have caused the relative difference of this residential quarter and adjacent cell signal to change, so that terminal use's reporting measurement reports frequently, the upstream data load increases, the position of terminal use in the residential quarter constantly changes at center of housing estate and cell edge, and then causes the increase of scheduler load, dispatching algorithm bad stability.
When being in weak overlay area, residential quarter, because the signal difference of this residential quarter and adjacent cell does not satisfy the cell edge condition, cause the terminal use to be scheduled for center of housing estate, at this moment, the original signal of terminal use is just poor, and can reduce on power division the user of center of housing estate, caused the flow of terminal use in this situation poorer, affect user's susceptibility.
Summary of the invention
Main purpose of the present invention provides method of discrimination and the base station of a kind of descending static ICIC, can effectively lower in the ICIC algorithm terminal use in the frequent switching of center of housing estate and cell edge.
The technical solution adopted for the present invention to solve the technical problems is:
The method of discrimination of a kind of descending static ICIC, it comprises:
Preset the first threshold value, and obtain the second threshold value according to the signal strength signal intensity of switching cell number and switching point;
When terminal use's relative signal intensity greater than described the first threshold value and described terminal use's absolute signal intensity during greater than the second threshold value, judge that described terminal use is in the central area of this residential quarter, otherwise judge that described terminal use is in the edge zone of this residential quarter.
Preferably, described relative signal intensity is the difference of signal strength signal intensity of described terminal use's the signal strength signal intensity of this residential quarter and this terminal use's adjacent cell, and described absolute signal intensity is the signal strength signal intensity of this residential quarter of described terminal use.
Preferably, described the first threshold value is 5db.
Preferably, described the second threshold value be described terminal use this residential quarter average signal strength.
Preferably, the acquisition process of described the second threshold value is:
Wherein: RSRP
Thresh-ICIC-mBe the absolute door limit value of residential quarter m in the differentiation process of ICIC, n is to be adjacent cell and the residential quarter number that switches with residential quarter m on measurement circuit and the network optimization circuit, RSRP
ImThe signal strength signal intensity RSRP of switching point when switching to residential quarter m for cell i.
A kind of base station, it comprises:
The threshold value determining unit is used for default the first threshold value, and obtains the second threshold value according to the signal strength signal intensity of switching cell number and switching point;
The threshold value comparing unit, be used for when terminal use's relative signal intensity greater than described the first threshold value and described terminal use's absolute signal intensity during greater than the second threshold value, judge that described terminal use is in the central area of this residential quarter, otherwise judge that described terminal use is in the edge zone of this residential quarter.
Preferably, described relative signal intensity is the difference of signal strength signal intensity of described terminal use's the signal strength signal intensity of this residential quarter and this terminal use's adjacent cell, and described absolute signal intensity is the signal strength signal intensity of this residential quarter of described terminal use.
Preferably, described the first threshold value is 5db.
Preferably, described the second threshold value be described terminal use this residential quarter average signal strength.
Preferably, the acquisition process of described the second threshold value is:
Wherein: RSRP
Thresh-ICIC-mBe the absolute door limit value of residential quarter m in the differentiation process of ICIC, n is to be adjacent cell and the residential quarter number that switches with residential quarter m on measurement circuit and the network optimization circuit, RSRP
ImThe signal strength signal intensity RSRP of switching point when switching to residential quarter m for cell i.
Implement technical scheme of the present invention, have following beneficial effect: terminal use's provided by the invention relative signal intensity and absolute signal intensity judge that the terminal use is positioned at center of housing estate or cell edge, avoided the frequently conversion of terminal use at center of housing estate and cell edge, can carry out according to this estimate of situation the adjustment of transmitting power to the zone at terminal use place, solve the low problem of weak overlay area terminal use's throughput, improved terminal use's experience and impression.
Description of drawings
The flow chart of the method for discrimination of the descending static ICIC that Fig. 1 provides for the embodiment of the invention;
The structural representation of the base station that Fig. 2 provides for the embodiment of the invention.
The realization of the object of the invention, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the invention provides the method for discrimination of a kind of descending static ICIC, and as shown in Figure 1, it comprises step:
S110, default the first threshold value, and obtain the second threshold value according to the signal strength signal intensity of switching cell number and switching point;
In the present embodiment, the signal strength signal intensity of preferred the first threshold value is 5db, among other embodiment, also can be the signal strength signal intensity of other numerical value, such as 8db, 10db etc.; The second threshold value be the terminal use in the average signal strength of this residential quarter, also can be other signal strength signal intensity, such as a little higher than average signal strength or slightly be lower than the value of this average signal strength.
S120, when terminal use's relative signal intensity greater than described the first threshold value and described terminal use's absolute signal intensity during greater than the second threshold value, judge that described terminal use is in the central area of this residential quarter, otherwise judge that described terminal use is in the edge zone of this residential quarter.In step S120, described relative signal intensity is the criterion that defines in the A3 event among 3GPP (The 3rd Generation Partnership Project, third generation partner program) the 36.331-930 agreement 5.5.4.3.In the A3 event, the difference of the signal strength signal intensity of the signal strength signal intensity of this residential quarter of terminal use and this terminal use's adjacent cell is relative value.Absolute signal intensity is the signal strength signal intensity of this residential quarter of terminal use, absolute signal intensity is the criterion that defines in the A2 event among 3GPP (The 3rd Generation Partnership Project, third generation partner program) the 36.331-930 agreement 5.5.4.3.In the A2 event, the second threshold value is absolute value.In the present embodiment, when the difference of the signal strength signal intensity of the signal strength signal intensity of this residential quarter of terminal use and this terminal use's adjacent cell is higher than certain thresholding (be first threshold value of 5db such as signal strength signal intensity), then judge again the absolute value of signal strength signal intensity of this residential quarter of terminal use, when the absolute value of signal strength signal intensity is higher than certain thresholding (such as the second threshold value), could determine user centered by this terminal use, namely be positioned at center of housing estate, otherwise be edge customer, namely be positioned at cell edge.Like this, avoided the frequent transitions of terminal use at center of housing estate and cell edge, the terminal use who is defined as edge customer is dispatched to non-interfering frequency band, and this frequency band strengthened transmitting power, solve the low problem of weak overlay area terminal use's throughput, improved terminal use's experience and impression.
In the above-described embodiments, described the second threshold value is the absolute door limit value, and this absolute door limit value acquisition process is:
Wherein: RSRP
Thresh-ICIC-mBe the absolute door limit value of residential quarter m in the differentiation process of ICIC, n is to be adjacent cell and the residential quarter number that switches with residential quarter m on measurement circuit and the network optimization circuit, RSRP
ImThe signal strength signal intensity RSRP of switching point when switching to residential quarter m for cell i.
The embodiment of the invention also provides a kind of base station, and as shown in Figure 2, this base station 200 comprises:
Threshold value determining unit 210 is used for default the first threshold value, and obtains the second threshold value according to the signal strength signal intensity of switching cell number and switching point;
Threshold value comparing unit 220, be used for when terminal use's relative signal intensity greater than described the first threshold value and described terminal use's absolute signal intensity during greater than the second threshold value, judge that described terminal use is in the central area of this residential quarter, otherwise judge that described terminal use is in the edge zone of this residential quarter.
In the present embodiment, preset the first threshold value by threshold value determining unit 210, and obtain the second threshold value according to the signal strength signal intensity of switching cell number and switching point, then the relative signal intensity of judging these terminal uses by this threshold value comparing unit 220 is greater than described the first threshold value and described terminal use's absolute signal intensity during greater than the second threshold value, determine that just this terminal use is positioned at the central area of this residential quarter, i.e. user centered by this terminal use; Otherwise be edge customer, be positioned at cell edge.Avoided the frequent transitions of terminal use at center of housing estate and cell edge, the terminal use who is defined as edge customer is dispatched to non-interfering frequency band, and this frequency band strengthened transmitting power, solve the low problem of weak overlay area terminal use's throughput, improved terminal use's experience and impression.
In the present embodiment, preferably, described relative signal intensity is the difference of signal strength signal intensity of described terminal use's the signal strength signal intensity of this residential quarter and this terminal use's adjacent cell, and described absolute signal intensity is the signal strength signal intensity of this residential quarter of described terminal use.
In the present embodiment, preferably, the first threshold value is 5db.
In the present embodiment, preferably, the second threshold value is described terminal use's average signal strength.
In the present embodiment, preferably, the second threshold value is the absolute door limit value, and the acquisition process of this absolute door limit value is:
Wherein: RSRP
Thresh-ICIC-mBe the absolute door limit value of residential quarter m in the differentiation process of ICIC, n is to be adjacent cell and the residential quarter number that switches with residential quarter m on measurement circuit and the network optimization circuit, RSRP
ImThe signal strength signal intensity RSRP of switching point when switching to residential quarter m for cell i.
Below only be preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for discrimination of a descending static ICIC is characterized in that, comprising:
Preset the first threshold value, and obtain the second threshold value according to the signal strength signal intensity of switching cell number and switching point;
When terminal use's relative signal intensity greater than described the first threshold value and described terminal use's absolute signal intensity during greater than the second threshold value, judge that described terminal use is in the central area of this residential quarter, otherwise judge that described terminal use is in the edge zone of this residential quarter.
2. the method for claim 1, it is characterized in that, described relative signal intensity is the difference of signal strength signal intensity of described terminal use's the signal strength signal intensity of this residential quarter and this terminal use's adjacent cell, and described absolute signal intensity is the signal strength signal intensity of this residential quarter of described terminal use.
3. method as claimed in claim 2 is characterized in that, described the first threshold value is 5db.
4. method as claimed in claim 3 is characterized in that, described the second threshold value is that described terminal use is in the average signal strength of this residential quarter.
5. method as claimed in claim 4 is characterized in that, described the second threshold value is the absolute door limit value, and it obtains formula and is:
Wherein: RSRP
Thresh-ICIC-mBe the absolute door limit value of residential quarter m in the differentiation process of coordinating district interference ICIC, n is to be adjacent cell and the residential quarter number that switches with residential quarter m on measurement circuit and the network optimization circuit, RSRP
ImThe signal strength signal intensity RSRP of switching point when switching to residential quarter m for cell i.
6. a base station is characterized in that, comprising:
The threshold value determining unit is used for default the first threshold value, and obtains the second threshold value according to the signal strength signal intensity of switching cell number and switching point;
The threshold value comparing unit, be used for when terminal use's relative signal intensity greater than described the first threshold value and described terminal use's absolute signal intensity during greater than the second threshold value, judge that described terminal use is in the central area of this residential quarter, otherwise judge that described terminal use is in the edge zone of this residential quarter.
7. base station as claimed in claim 6, it is characterized in that, described relative signal intensity is the difference of signal strength signal intensity of described terminal use's the signal strength signal intensity of this residential quarter and this terminal use's adjacent cell, and described absolute signal intensity is the signal strength signal intensity of this residential quarter of described terminal use.
8. base station as claimed in claim 7 is characterized in that, described the first threshold value is 5db.
9. base station as claimed in claim 8 is characterized in that, described the second threshold value be described terminal use this residential quarter average signal strength.
10. base station as claimed in claim 9 is characterized in that, described the second threshold value is the absolute door limit value, and it obtains formula and is:
Wherein: RSRP
Thresh-ICIC-mBe the absolute door limit value of residential quarter m in the differentiation process of ICIC, n is to be adjacent cell and the residential quarter number that switches with residential quarter m on measurement circuit and the network optimization circuit, RSRP
ImThe signal strength signal intensity RSRP of switching point when switching to residential quarter m for cell i.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102224910A CN102917411A (en) | 2011-08-04 | 2011-08-04 | Downlink static ICIC judgment method and base station |
| PCT/CN2012/074307 WO2012155754A1 (en) | 2011-08-04 | 2012-04-18 | Method and base station for determining downlink static icic |
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| CN2011102224910A CN102917411A (en) | 2011-08-04 | 2011-08-04 | Downlink static ICIC judgment method and base station |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106358173A (en) * | 2015-07-15 | 2017-01-25 | 普天信息技术有限公司 | Down-link cell-edge user determination method and device |
| CN110234163A (en) * | 2018-03-06 | 2019-09-13 | 中国移动通信集团海南有限公司 | Localization method, device, equipment and the medium of user terminal |
| CN111031550A (en) * | 2018-10-09 | 2020-04-17 | 中国移动通信集团甘肃有限公司 | Method and device for judging weak coverage area of wireless network |
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| KR101104506B1 (en) * | 2009-12-15 | 2012-01-12 | 한국전자통신연구원 | Base station for operating COMP |
| CN102076096B (en) * | 2011-01-12 | 2013-08-28 | 上海华为技术有限公司 | CoMP realizing method and device and base station |
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| CN1738476A (en) * | 2004-08-16 | 2006-02-22 | 上海华为技术有限公司 | Channel switching method |
| CN101420746A (en) * | 2007-10-26 | 2009-04-29 | 中兴通讯股份有限公司 | Method for interference coordination between cells and interference coordination information transmission method therefor |
| CN101437236A (en) * | 2008-12-10 | 2009-05-20 | 华为技术有限公司 | Method, equipment and system for distributing time slot |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106358173A (en) * | 2015-07-15 | 2017-01-25 | 普天信息技术有限公司 | Down-link cell-edge user determination method and device |
| CN106358173B (en) * | 2015-07-15 | 2020-02-04 | 普天信息技术有限公司 | Method and device for determining downlink edge user |
| CN110234163A (en) * | 2018-03-06 | 2019-09-13 | 中国移动通信集团海南有限公司 | Localization method, device, equipment and the medium of user terminal |
| CN111031550A (en) * | 2018-10-09 | 2020-04-17 | 中国移动通信集团甘肃有限公司 | Method and device for judging weak coverage area of wireless network |
| CN111031550B (en) * | 2018-10-09 | 2022-08-30 | 中国移动通信集团甘肃有限公司 | Method and device for judging weak coverage area of wireless network |
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