CN103686748A - Method for partitioning edge users in downlink - Google Patents
Method for partitioning edge users in downlink Download PDFInfo
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- CN103686748A CN103686748A CN201210363947.XA CN201210363947A CN103686748A CN 103686748 A CN103686748 A CN 103686748A CN 201210363947 A CN201210363947 A CN 201210363947A CN 103686748 A CN103686748 A CN 103686748A
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Abstract
The invention discloses a method for partitioning edge users in a downlink. The method comprises the following steps: A, determining a candidate edge user set according to an edge user determining method in the prior art; and B, calculating the received signal strength indicator RSSI of user equipment UE, excluding UE of which the RSSI is smaller than a predetermined RSSI threshold in the candidate edge user set and determining the remaining UE in the candidate edge user set as the final edge users. By the adoption of the method, the accuracy of edge user selection can be improved, and the performance of the interference coordination algorithm can be improved.
Description
Technical field
The application relates to mobile communication technology field, relates in particular to a kind of method that in down link, edge customer is divided.
Background technology
The communication service in the following whole world has more and more higher requirement to the transmission rate of data, LTE/LTE-A system is on the basis of assurance community marginal user performance, and how further to improve frequency efficiency is the focus that people study to improve the performance of total system always.During the networking of LTE/LTE-A system same frequency, the frequency band of whole system can be used in Yi Ge community, inevitably there is presence of intercell interference, particularly in cell edge area, user due to from base station distance away from, the decay of signal energy experience is larger, the intensity of useful signal is less, identical frequency spectrum resource has been used at intersection in two neighbor cells, and it is larger that user performance is affected by presence of intercell interference.
Interference coordination technique mainly for be to be disturbed larger Cell Edge User.The basic thought of downlink interference collaboration is: the edge customer of neighbor cell is not used identical running time-frequency resource, carries out descending power simultaneously and distributes adjustment, effectively to reduce the suffered strong jamming from adjacent cell of this Cell Edge User, improves marginal user performance.Therefore, carry out exactly edge customer division and just become the key factor that improves interference coordination algorithm performance.
In existing interference coordination technique, edge customer definite mainly contains following several method:
Method 1: according to user Serving cell Reference Signal Received Power (RSRP, Reference Signal Receiving Power), RSRP less as edge customer;
Method 2: according to user Serving cell RSRP and the strongest adjacent cell RSRP poor (PPR), PPR less as edge customer;
Method 3: the downstream broadband channel quality indication (CQI) according to user feedback, is defined as edge customer by the user who is less than certain downstream broadband CQI thresholding.
1 power of considering signal of method wherein, and ignored the factor that adjacent cell is disturbed; 2 of methods consider and the interference of strong adjacent cell, and do not consider the disturbing factor of other adjacent cells; Although method 3 has been got rid of the shortcoming of first two method, the variable effect that declines soon in UE moving process is larger, causes the CQI value of measurement inaccurate.Above three kinds of methods are not all considered some specific factors in actual environment, as the impact due to shade, other factors such as indoor, although user may signal strength signal intensity a little less than, but the interference being subject to is also less, by interference coordination algorithm, reduce after its interference, its channel conditions not can be improved significantly, therefore this part user should be got rid of outside edge customer.
Summary of the invention
The application provides a kind of method that in down link, edge customer is divided, and can improve the accuracy that edge customer is selected, and then improves interference coordination algorithm performance.
The method that in a kind of down link of the application, edge customer is divided, comprising:
A, according to the method for determining edge customer in prior art, determine edge customer set to be selected;
The received signal strength indicator RSSI of B, calculating user equipment (UE) gets rid of the UE that RSSI is less than predetermined RSSI thresholding in edge customer set to be selected, by UE remaining in edge customer set to be selected, is final edge customer.
Preferably, edge customer set to be selected is one of following three set or wherein two intersection of sets collection or union or this three intersection of sets collection or union:
Set a: the Serving cell Reference Signal Received Power RSRP reporting is less than the UE set of predetermined RSRP thresholding;
Set b: the Serving cell RSRP reporting and the difference PPR of the strongest adjacent cell RSRP are less than the user's of predetermined PPR thresholding UE set;
Set c: the downstream broadband channel quality indicator (CQI) reporting is less than the UE set of predetermined broadband CQI thresholding.
Preferably, the received signal strength indicator RSSI of described calculating user equipment (UE) is:
According to the RSRP of reporting of user and Reference Signal Received Quality RSRQ and system bandwidth, calculating RSSI is:
wherein RSRP and RSRQ are UE reporting information, and N is total Resource Block number.
As can be seen from the above technical solutions, first according to the method for definite edge customer of the prior art, tentatively determine and carry out after edge customer, then screen according to user's RSSI information, determine final edge customer.Because the impact of thermal noise is conventionally very little, therefore when available signal power and with interference power all hour, RSSI value is also necessarily less, therefore by the screening of RSSI information, can get rid of signal and disturb all less user, improve the accuracy that edge customer is selected, and then improve interference coordination algorithm performance.
Accompanying drawing explanation
The method flow diagram that in a kind of down link that Fig. 1 provides for the embodiment of the present invention, edge customer is divided.
Embodiment
Received signal strength indicator for total power signal (RSSI, the Received Signal Strength Indicator) expression that UE receives, RSSI is defined as follows:
RSSI=P
signal_receiv+I+N，
Wherein, P
signal_receivbe the available signal power receiving, comprise data-signal power and reference signal power; N is thermal noise power, and I is interference power.Because the impact of N is very little, therefore when available signal power and with interference power all hour, RSSI value is also necessarily less, therefore by the screening of RSSI information, can get rid of useful signal and disturb all less user, improve the accuracy that edge customer is selected, and then improve interference coordination algorithm performance.
The basic thought of the method that in a kind of down link that the application provides, edge customer is divided is: first according to certain mode, tentatively determine and carry out after edge customer, then screen according to user's RSSI information, determine final edge customer.
For making know-why, feature and the technique effect of present techniques scheme clearer, below in conjunction with specific embodiment, present techniques scheme is described in detail.
The method flow that in a kind of down link that the embodiment of the present invention provides, edge customer is divided as shown in Figure 1, comprises the steps:
Step 101: determine edge customer set to be selected according to the method for determining edge customer in prior art.
Edge customer set to be selected is one of following three set or wherein two intersection of sets collection or union or this three intersection of sets collection or union:
Set a: the Serving cell RSRP reporting is less than the UE set of predetermined RSRP thresholding;
Set b: the Serving cell RSRP reporting and the difference PPR of the strongest adjacent cell RSRP are less than the user's of predetermined PPR thresholding UE set;
Set c: the downstream broadband CQI reporting is less than the UE set of predetermined broadband CQI thresholding.
Step 102: calculating the RSSI of UE, get rid of the UE that RSSI is less than predetermined RSSI thresholding in edge customer set to be selected, is final edge customer by UE remaining in edge customer set to be selected.
The present embodiment provides the method for RSSI of calculating a kind of:
According to the RSRP of reporting of user and RSRQ and system bandwidth calculating RSSI, by the definition of RSRQ
the value that can derive RSSI is
rSRP and RSRQ information are UE reporting information, and N is total Resource Block (RB) number.
The foregoing is only the application's preferred embodiment; not in order to limit the application's protection range; all within the spirit and principle of present techniques scheme, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of the application's protection.
Claims (3)
1. the method that in down link, edge customer is divided, is characterized in that, comprising:
A, according to the method for determining edge customer in prior art, determine edge customer set to be selected;
The received signal strength indicator RSSI of B, calculating user equipment (UE) gets rid of the UE that RSSI is less than predetermined RSSI thresholding in edge customer set to be selected, by UE remaining in edge customer set to be selected, is final edge customer.
2. method according to claim 1, is characterized in that, edge customer set to be selected is one of following three set or wherein two intersection of sets collection or union or this three intersection of sets collection or union:
Set a: the Serving cell Reference Signal Received Power RSRP reporting is less than the UE set of predetermined RSRP thresholding;
Set b: the Serving cell RSRP reporting and the difference PPR of the strongest adjacent cell RSRP are less than the user's of predetermined PPR thresholding UE set;
Set c: the downstream broadband channel quality indicator (CQI) reporting is less than the UE set of predetermined broadband CQI thresholding.
3. method according to claim 1 and 2, is characterized in that, the received signal strength indicator RSSI of described calculating user equipment (UE) is:
According to the RSRP of reporting of user and Reference Signal Received Quality RSRQ and system bandwidth, calculating RSSI is:
wherein RSRP and RSRQ are UE reporting information, and N is total Resource Block number.
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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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103987080A (en) * | 2014-05-28 | 2014-08-13 | 京信通信系统（中国）有限公司 | Edge user determining method and base station equipment |
| 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 |
| CN107172711A (en) * | 2017-06-12 | 2017-09-15 | 京信通信系统（中国）有限公司 | A kind of method and device that resource is distributed for user equipment |
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| WO2010096952A1 (en) * | 2009-02-27 | 2010-09-02 | 上海贝尔股份有限公司 | Cooperative beam forming method, device and base station |
| CN102045857A (en) * | 2010-12-13 | 2011-05-04 | 中兴通讯股份有限公司 | Method for dispatching resources in orthogonal frequency division multiplexing (OFDM) system and base station |
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| CN101494895A (en) * | 2008-01-22 | 2009-07-29 | 中兴通讯股份有限公司 | Method and system for coordinating interference between districts |
| WO2010096952A1 (en) * | 2009-02-27 | 2010-09-02 | 上海贝尔股份有限公司 | Cooperative beam forming method, device and base station |
| CN102045857A (en) * | 2010-12-13 | 2011-05-04 | 中兴通讯股份有限公司 | Method for dispatching resources in orthogonal frequency division multiplexing (OFDM) system and base station |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103987080A (en) * | 2014-05-28 | 2014-08-13 | 京信通信系统（中国）有限公司 | Edge user determining method and base station equipment |
| 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 |
| 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 |
| CN107172711A (en) * | 2017-06-12 | 2017-09-15 | 京信通信系统（中国）有限公司 | A kind of method and device that resource is distributed for user equipment |
| 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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