CN103686748B - A kind of method that edge customer is divided in downlink - Google Patents
A kind of method that edge customer is divided in downlink Download PDFInfo
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- CN103686748B CN103686748B CN201210363947.XA CN201210363947A CN103686748B CN 103686748 B CN103686748 B CN 103686748B CN 201210363947 A CN201210363947 A CN 201210363947A CN 103686748 B CN103686748 B CN 103686748B
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Abstract
This application discloses the method that edge customer in a kind of downlink is divided, including：A, basis determine that the method for edge customer determines edge customer set to be selected in the prior art；B, the received signal strength indicator RSSI for calculating user equipment (UE), exclude UEs of the RSSI less than predetermined RSSI thresholdings in edge customer set to be selected, are final edge customer by remaining UE in edge customer set to be selected.The method can improve the accuracy of edge customer selection, and then improve interference coordination algorithm performance.
Description
Technical field
The application is related to a kind of method of edge customer division in mobile communication technology field, more particularly to downlink.
Background technology
The communication service in the following whole world has higher and higher requirement to the transmission rate of data, and LTE/LTE-A systems are being protected
On the basis of card community marginal user performance, how further to improve frequency efficiency is always to improve the performance of total system
The focus of people's research.During LTE/LTE-A system same frequency networkings, a cell be able to can not be kept away using the frequency band of whole system
There is inter-cell interference with exempting from, particularly in cell edge area, user due to from base station distance farther out, signal energy experience
Decay is larger, and the intensity of useful signal is smaller, and two neighbor cells have used identical frequency spectrum resource, user performance in intersection
Influenceed bigger by inter-cell interference.
Interference coordination technique is primarily directed to be disturbed larger Cell Edge User.The basic think of of downlink interference collaboration
Think be：The edge customer of neighbor cell does not use identical running time-frequency resource, while descending power distribution adjustment is carried out, effectively to drop
Strong jamming from adjacent cell suffered by low Cell Edge User, improves marginal user performance.Therefore, edge use is carried out exactly
Family divides the key factor for just turning into and improving interference coordination algorithm performance.
In existing interference coordination technique, the determination of edge customer mainly has following several method：
Method 1：According to user service cell reference signals receiving power（RSRP, Reference Signal
Receiving Power）, RSRP is less as edge customer；
Method 2：According to user service cell RSRP and most strong adjacent cell RSRP difference（PPR）, PPR is less as edge
User；
Method 3：Downstream broadband channel quality according to user feedback is indicated（CQI）, will be less than certain downstream broadband CQI
The user of limit is defined as edge customer.
Wherein method 1 only takes into account the power of signal, and ignores the factor of adjacent cell interference；Method 2 only take into account with
The interference of most strong adjacent cell, without the disturbing factor in view of other adjacent cells；Although method 3 eliminates first two method
Shortcoming, but fast decayization influence causes the CQI value of measurement inaccurate than larger in UE moving process.Three of the above method
Some specific factors in actual environment are not accounted for, and such as due to shade, the influence of interior other factors, user may
Although signal intensity is weaker, the interference being subject to is also smaller, and after interference coordination algorithm reduces its interference, its channel conditions is not
Can be improved significantly, therefore should this certain customers exclude outside edge customer.
The content of the invention
This application provides the method that edge customer in a kind of downlink is divided, the standard of edge customer selection can be improved
True property, and then improve interference coordination algorithm performance.
The method that edge customer is divided in a kind of downlink of the application, including：
A, basis determine that the method for edge customer determines edge customer set to be selected in the prior art；
B, the received signal strength indicator RSSI for calculating user equipment (UE), exclude RSSI small in edge customer set to be selected
It is final edge customer by remaining UE in edge customer set to be selected in the UE of predetermined RSSI thresholdings.
It is preferred that edge customer collection to be selected be combined into one of following three set or two of which intersection of sets collection or union,
Or these three intersection of sets collection or union：
Set a：The Serving cell Reference Signal Received Power RSRP for reporting gathers less than the UE of predetermined RSRP thresholdings；
Set b：Users of the Serving cell RSRP and the difference PPR of most strong adjacent cell RSRP for reporting less than predetermined PPR thresholdings
UE set；
Set c：The downstream broadband channel quality indicator (CQI) for reporting is gathered less than the UE of predetermined broadband CQI thresholdings.
It is preferred that the received signal strength indicator RSSI of the calculating user equipment (UE) is：
RSRP and Reference Signal Received Quality RSRQ and system bandwidth according to reporting of user calculate RSSI：Wherein RSRP and RSRQ is UE reporting informations, and N is total Resource Block number.
As can be seen from the above technical solutions, the method first according to determination edge customer of the prior art is primarily determined that
After carrying out edge customer, the RSSI information further according to user is screened, it is determined that final edge customer.Due to the shadow of thermal noise
The usual very little of sound, thus when available signal power and it is all smaller with jamming power when, RSSI value is also necessarily smaller, therefore passes through
The screening of RSSI information, can exclude signal and disturb all less user, improve the accuracy of edge customer selection, Jin Erti
High interference tuning algorithm performance.
Brief description of the drawings
Fig. 1 is the method flow diagram of edge customer division in a kind of downlink provided in an embodiment of the present invention.
Specific embodiment
The total power signal received signal strength indicator that UE is received（RSSI, Received Signal Strength
Indicator）Represent, RSSI is defined as follows：
RSSI=Psignal_receiv+ I+N,
Wherein, Psignal_receivIt is the available signal power for receiving, including data signal power and reference signal power；N
It is thermal noise power, I is jamming power.Due to the influence very little of N, therefore when available signal power and all smaller with jamming power
When, RSSI value is also necessarily smaller, therefore by the screening of RSSI information, can exclude useful signal and disturb all less use
Family, improves the accuracy of edge customer selection, and then improve interference coordination algorithm performance.
The basic thought of the method that edge customer is divided is in a kind of downlink that the application is provided：First according to certain
Mode primarily determines that after carrying out edge customer that the RSSI information further according to user is screened, it is determined that final edge customer.
To make know-why, feature and the technique effect of technical scheme clearer, below in conjunction with specific reality
Example is applied to be described in detail technical scheme.
In a kind of downlink provided in an embodiment of the present invention edge customer divide method flow as shown in figure 1, including
Following steps：
Step 101：Method according to determination edge customer in the prior art determines edge customer set to be selected.
Edge customer collection to be selected be combined into one of following three set or two of which intersection of sets collection or union or this three
Individual intersection of sets collection or union：
Set a：The Serving cell RSRP for reporting gathers less than the UE of predetermined RSRP thresholdings；
Set b：Users of the Serving cell RSRP and the difference PPR of most strong adjacent cell RSRP for reporting less than predetermined PPR thresholdings
UE set；
Set c：The downstream broadband CQI for reporting gathers less than the UE of predetermined broadband CQI thresholdings.
Step 102：The RSSI of UE is calculated, RSSI is excluded in edge customer set to be selected less than predetermined RSSI thresholdings
UE, is final edge customer by remaining UE in edge customer set to be selected.
The present embodiment provides a kind of method of calculating RSSI：
RSRP and RSRQ and system bandwidth according to reporting of user calculate RSSI, by the definition of RSRQThe value that RSSI can be derived isRSRP and RSRQ information is on UE notifies
Breath, N is total Resource Block（RB）Number.
The foregoing is only the preferred embodiment of the application, be not used to limit the protection domain of the application, it is all
Within the spirit and principle of technical scheme, any modification, equivalent substitution and improvements done etc. should be included in this Shen
Within the scope of please protecting.
Claims (3)
1. a kind of method that edge customer is divided in downlink, it is characterised in that including：
A, basis determine that the method for edge customer determines edge customer set to be selected in the prior art；
B, the received signal strength indicator RSSI for calculating user equipment (UE), exclude RSSI less than pre- in edge customer set to be selected
Determine the UE of RSSI thresholdings, be final edge customer by remaining UE in edge customer set to be selected；
Wherein, the RSSI is used for the total power signal for indicating UE to receive, and is defined as RSSI=Psignal_receiv+ I+N,
Psignal_receivIt is the available signal power for receiving；N is thermal noise power, and I is jamming power.
2. method according to claim 1, it is characterised in that edge customer collection to be selected be combined into one of following three set,
Or two of which intersection of sets collection or union or these three intersection of sets collection or union：
Set a：The Serving cell Reference Signal Received Power RSRP for reporting gathers less than the UE of predetermined RSRP thresholdings；
Set b：UEs of the Serving cell RSRP and the difference PPR of most strong adjacent cell RSRP for reporting less than the user of predetermined PPR thresholdings
Set；
Set c：The downstream broadband channel quality indicator (CQI) for reporting is gathered less than the UE of predetermined broadband CQI thresholdings.
3. method according to claim 1 and 2, it is characterised in that the received signal strength of the calculating user equipment (UE)
Indicate RSSI be：
RSRP and Reference Signal Received Quality RSRQ and system bandwidth according to reporting of user calculate RSSI：
Wherein RSRP and RSRQ is UE reporting informations, and N is total Resource Block number.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210363947.XA CN103686748B (en) | 2012-09-26 | 2012-09-26 | A kind of method that edge customer is divided in downlink |
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| CN201210363947.XA CN103686748B (en) | 2012-09-26 | 2012-09-26 | A kind of method that edge customer is divided in downlink |
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| CN103686748A CN103686748A (en) | 2014-03-26 |
| CN103686748B true CN103686748B (en) | 2017-05-31 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103987080B (en) * | 2014-05-28 | 2018-05-29 | 京信通信系统（中国）有限公司 | The definite method and base station equipment of a kind of edge customer |
| 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 |
| CN107172711B (en) * | 2017-06-12 | 2019-11-19 | 京信通信系统（中国）有限公司 | A kind of method and device for distributing resource for user equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101494895B (en) * | 2008-01-22 | 2010-12-08 | 中兴通讯股份有限公司 | Method and system for coordinating interference between districts |
| JP5444374B2 (en) * | 2009-02-27 | 2014-03-19 | アルカテル−ルーセント | Cooperative beam forming method, cooperative beam forming apparatus, and cooperative beam forming base station |
| CN102045857B (en) * | 2010-12-13 | 2014-04-30 | 中兴通讯股份有限公司 | Method for dispatching resources in orthogonal frequency division multiplexing (OFDM) system and base station |
| 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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Granted publication date: 20170531 Termination date: 20210926 |