CN102457889B - A kind of method and device reducing the common equipment interference of LTE and ISM - Google Patents
A kind of method and device reducing the common equipment interference of LTE and ISM Download PDFInfo
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- CN102457889B CN102457889B CN201010524015.XA CN201010524015A CN102457889B CN 102457889 B CN102457889 B CN 102457889B CN 201010524015 A CN201010524015 A CN 201010524015A CN 102457889 B CN102457889 B CN 102457889B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of method and the device that reduce the common equipment interference of LTE and ISM, for solving LTE and ISM equipment interference problem altogether.The present invention is by monitoring the LTE system be operated on the frequency band adjacent with ISM working band, when finding that the difference between the CQI that satisfied distance interference source UE farthest reports and the CQI that nearest UE reports apart from interference source is greater than predefine threshold value, perform jam avoidance strategy, the frequency range shared by the UE that ISM band of adjusting the distance is nearest reschedules.The common equipment interference between LTE and ISM system can be reduced by the present invention.
Description
Technical field
The present invention relates to the mutual interference field of wireless communications products, particularly, relate to a kind of method and the device that reduce the interference that LTE (LongTermEvolution) brings with the common equipment of industrial scientific medical frequency range (IndustrialScientificandMedical, ISM).
Background technology
In recent years, along with the fast development of mobile communication technology, the function of terminal equipment also more and more presents diversified and complicated, and particularly along with the development of 3G and 4G technology, the demand of market to intelligent machine (smartdevice) grows with each passing day.These terminal equipments of picture intelligent machine, can require to support multiple wireless access technology within one device usually simultaneously, as: LTE and ISM (comprising WLAN, Bluetooth and GPS) etc.Because these access technologies are on identical or near frequency band, once work together, be in the effect of access technology due to the nonlinear device such as power amplifier and frequency mixer of emission state, can produce in adjacent channel and leak (in communication, usual ACLR weighs), if now other access technology of equipment is in accepting state, the severe jamming that will be subject to altogether.This interference phenomenon is commonly referred to common equipment interference (or mutual interference).
Tradition solves mutual interference problem method, usually has increase isolation between antennas, close frequency range increases protection interval or by installing filter filtering etc. additional.But along with the raising of the integrated level of terminal equipment, terminal is more and more miniaturized, the space of the essentially no lifting of isolation between antennas.Increase protection interval to mean and will waste valuable frequency spectrum resource, and the filter of index harshness not only design difficulty is large, and cost is also make terminal equipment business intolerable.What is more important, if frequency range is too near to, the such as Band40 of WLAN (wireless local area network) (WLAN) and LTE, channel width is all 20MHz, in this case, above-mentioned method result of use is also undesirable, is therefore necessary that studying a kind of new method solves LTE and ISM equipment interference problem altogether.
Summary of the invention
In view of this, main purpose of the present invention is that providing a kind of reduces method and the device that LTE and ISM is total to equipment interference, for solving LTE and ISM equipment interference problem altogether.
For achieving the above object, technical scheme of the present invention is achieved in that
Reduce the method that LTE and ISM is total to equipment interference, the method comprises:
The LTE system be operated on the frequency band adjacent with ISM working band is monitored;
When difference between the channel quality information (CQI) that distance interference source UE farthest reports and the CQI that nearest UE reports apart from interference source is greater than predefined threshold value, perform jam avoidance strategy.
Further, described monitoring comprises: receive its CQI descending UE to report by base station (eNB), obtain the CQI that CQI that distance interference source UE farthest that this eNB serves reports and the nearest UE of distance interference source reports, and the difference of the two is judged.
Further, described execution jam avoidance strategy comprises:
Frequency sub-band shared by the UE that interference source of adjusting the distance is nearest reschedules, vacate frequency sub-band shared by this UE need not, be that this UE distributes frequency sub-band again.
Further, the described frequency band adjacent with ISM working band is specially: Band40 frequency range or Band7 frequency range.
Based on the specific embodiment of the invention, provide a kind of device reducing the common equipment interference of LTE and ISM, this device comprises:
Monitoring modular, for monitoring the LTE system be operated on the frequency band adjacent with ISM working band;
Policy enforcement module, when being greater than predefined threshold value for the difference between the CQI that distance interference source UE farthest reports and the CQI that nearest UE reports apart from interference source, performs jam avoidance strategy.
Further, described monitoring modular comprises:
CQI receiver module, for receiving the CQI that the administrative UE in base station reports;
CQI acquisition module, for obtaining the CQI that CQI that base station administrative UE middle distance interference source UE farthest reports and the nearest UE of distance interference source reports;
Judge module, whether the difference between the CQI that the CQI reported for judging distance interference source the UE farthest and UE nearest apart from interference source reports is greater than predefined threshold value.
Further, the jam avoidance strategy performed by described policy enforcement module comprises:
Frequency sub-band shared by the UE that interference source of adjusting the distance is nearest reschedules, vacate frequency sub-band shared by this UE need not, be that this UE distributes frequency sub-band again.
The present invention is by monitoring the LTE system be operated on the frequency band adjacent with ISM working band, when finding that the difference between the CQI that satisfied distance interference source UE farthest reports and the CQI that nearest UE reports apart from interference source is greater than predefine threshold value, perform jam avoidance strategy, the frequency range shared by the UE that ISM band of adjusting the distance is nearest reschedules.The common equipment interference between LTE and ISM system can be reduced by the present invention.
Accompanying drawing explanation
Fig. 1 is the method flow diagram that the present invention reduces that LTE and ISM is total to equipment interference;
Fig. 2 is the apparatus structure schematic diagram that the present invention reduces that LTE and ISM is total to equipment interference.
Embodiment
For the common equipment interference co-existence problem of LTE and ISM, because LTE and ISM system is on same terminal equipment, space length is very near, if the bandwidth shared by two systems is close, the transmitting of a system can be very serious to the interference of the reception of another system.In systems in practice, have the interference of two kinds of scenes particularly serious:
1, LTETDD pattern uses Band40 frequency range, occupied bandwidth is that the frequency band that the uplink and downlink of 2300MHz ~ 2400MHz, ISM take usually is 2400MHz ~ 2480MHz, under this scene, LTE can cause interference to ISM, and ISM also can cause interference to LTE simultaneously.
2, LTEFDD pattern up use Band7 frequency range, occupied bandwidth is that the frequency band that the uplink and downlink of 2500MHz ~ 2570MHz, ISM take usually is 2400MHz ~ 2480MHz, and under this scene, LTE can cause interference to ISM.
When carrying out the design of LTE system, normally be concerned about that LTE system is disturbed and causes the situation of hydraulic performance decline, the present invention is subject to common equipment I SM system interference and the problem causing hydraulic performance decline to solve LTE, a kind of method and the device that reduce equipment interference altogether between LTE and ISM are proposed, its basic thought is: within the scope of the UE that a base station is served, channel quality information (the ChannelQualityIndicator reported by UE, CQI) information carries out interference monitoring, difference between the CQI that the CQI that the distance interference source UE farthest served in this base station reports and the nearest UE of the distance interference source that this base station is served reports, when being greater than predefined a certain preferred value, LTE system thinks that frequency sub-band that the nearest UE of distance interference source that this base station is served works has received the interference of ISM system, then this base station performs jam avoidance strategy.
It is be in descending process in LTE system that LTE is disturbed the most serious scene, when UE is in accepting state, is namely similar to the 1st kind of scene, and under this scene, LTETDD pattern uses Band40 frequency range.But the invention is not restricted to the scene that LTE uses Band40, so use " BandLTE " and " BandISM " to be described, represent the frequency band shared by LTE system and the frequency band shared by ISM system respectively below.
For making the object, technical solutions and advantages of the present invention clearly understand, by the following examples also with reference to accompanying drawing, the present invention is described in more detail.
Fig. 1 is the method flow diagram that the present invention reduces equipment interference altogether between LTE and ISM, and detailed step is as follows:
Step 101, the LTE system be operated on the frequency band adjacent with ISM working band to be monitored;
This step is used for determining to which LTE system to monitor, namely the LTE system be operated on the such frequency band adjacent with ISM working band of Band40 is needed to monitor, for being operated in from the LTE system on the frequency band away from ISM working band, because interference is very little, so do not need to monitor.
Step 102, in the LTE system of being monitored, base station (eNB) receives the CQI that its lower UE reports, and obtains the CQI (being defined as CQI2) that CQI (being defined as CQI1) that distance interference source UE farthest that this eNB serves reports and the nearest UE of distance interference source reports;
In the descending process of LTE, base station side sends, end side receives, the quality of the data that UE meeting basis receives and pilot signal, estimate to obtain channel quality information (CQI), and CQI is reported eNB, eNB monitors the size disturbed LTE system ISM system by CQI.
In LTE system running, base station side can communicate with N number of UE simultaneously simultaneously, the working frequency range of the sub-band distance interference source ISM shared by the UE wherein had is closer, the working frequency range of the sub-band distance interference source ISM shared by some UE is distant, at this moment eNB needs to monitor, when the CQI that distance interference source UE far away reports is better than the CQI that the near UE of distance interference source reports far away, (value of CQI is from 0 ~ 15, be worth larger explanation performance better), illustrate likely there is ISM interference source, need to carry out jam avoidance strategy.
Whether the difference between the CQI2 that the CQI1 that step 103, base station judging distance interference source UE farthest report and the UE nearest apart from interference source reports is greater than predefined threshold value, if be greater than, be judged to be to there is interference, perform step 104, otherwise be judged to not to be interfered, continue to perform step 102;
When the difference of CQI1-CQI2 is greater than a certain predefined threshold value Q, namely base station it is determined that the presence of ISM interference source, needs to carry out jam avoidance strategy.Described predefined threshold value Q can be a preferred value, and such as Q is 2 or 3;
Step 104, this step are for performing jam avoidance strategy, namely LTE system (eNB side) thinks that a UE nearest apart from ISM band receives interference, frequency sub-band shared by this UE is rescheduled, nearest this frequency sub-band of the distance ISM working frequency range used by this UE is vacated need not, again for this UE distributes a distance ISM working frequency range frequency sub-band far away, after executing this step, 102 are performed;
In next circulation, step 102 again determine in its UE served distance interference source nearest and UE farthest, if still CQI1-CQI2 > Q, continue to perform jam avoidance strategy, until CQI1-CQI2 is not more than Q.
Fig. 2 is that a kind of that the present invention proposes reduces the schematic diagram that LTE and ISM is total to the device 200 of equipment interference, and this device comprises: monitoring modular 210, policy enforcement module 220.
Described monitoring modular 210 is for monitoring the LTE system be operated on the frequency band adjacent with ISM working band; This module comprises further:
The CQI that CQI receiver module 201 reports for receiving the administrative UE in base station;
The CQI that CQI acquisition module 202 reports for the CQI that obtains base station administrative UE middle distance interference source UE farthest and report and the nearest UE of distance interference source;
Whether the difference between the CQI that the CQI that judge module 203 reports for judging distance interference source the UE farthest and nearest UE of distance interference source reports is greater than predefined threshold value.
When policy enforcement module 220 is greater than predefined threshold value for the difference between the CQI that distance interference source UE farthest reports and the CQI that nearest UE reports apart from interference source, perform jam avoidance strategy.Jam avoidance strategy performed by described policy enforcement module is specially: the frequency sub-band shared by the UE that interference source of adjusting the distance is nearest reschedules, vacate frequency sub-band shared by this UE need not, be that this UE distributes frequency sub-band again.The described frequency band adjacent with ISM working band is specially: Band40 frequency range or Band7 frequency range.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. reduce the method that the common equipment of Long Term Evolution LTE and industrial scientific medical frequency range ISM disturbs, it is characterized in that, the method comprises:
The LTE system be operated on the frequency band adjacent with ISM working band is monitored;
When difference between the channel quality information CQI and the CQI that nearest UE reports apart from interference source of distance interference source reported by user equipment UE is farthest greater than predefined threshold value, perform jam avoidance strategy; Wherein,
Described execution jam avoidance strategy, comprising: the frequency sub-band shared by the UE that interference source of adjusting the distance is nearest reschedules, vacate frequency sub-band shared by this UE need not, be that this UE distributes frequency sub-band again.
2. method according to claim 1, is characterized in that, described monitoring comprises:
Receive by base station eNB the CQI that its lower UE reports, obtain the CQI that CQI that distance interference source UE farthest that this eNB serves reports and the nearest UE of distance interference source reports, and the difference of the two is judged.
3. method according to claim 1, is characterized in that, the described frequency band adjacent with ISM working band is specially: Band40 frequency range or Band7 frequency range.
4. reduce the device that the common equipment of Long Term Evolution LTE and industrial scientific medical frequency range ISM disturbs, it is characterized in that, this device comprises:
Monitoring modular, for monitoring the LTE system be operated on the frequency band adjacent with ISM working band;
Policy enforcement module, when being greater than predefined threshold value for the difference between the channel quality information CQI that distance interference source UE farthest reports and the CQI that nearest UE reports apart from interference source, performs jam avoidance strategy; Wherein,
Described execution jam avoidance strategy, comprising: the frequency sub-band shared by the UE that interference source of adjusting the distance is nearest reschedules, vacate frequency sub-band shared by this UE need not, be that this UE distributes frequency sub-band again.
5. device according to claim 4, is characterized in that, described monitoring modular comprises:
CQI receiver module, for receiving the CQI that the administrative UE in base station reports;
CQI acquisition module, for obtaining the CQI that CQI that base station administrative UE middle distance interference source UE farthest reports and the nearest UE of distance interference source reports;
Judge module, whether the difference between the CQI that the CQI reported for judging distance interference source the UE farthest and UE nearest apart from interference source reports is greater than predefined threshold value.
6. the device according to claim 4 or 5, is characterized in that, the described frequency band adjacent with ISM working band is specially: Band40 frequency range or Band7 frequency range.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010524015.XA CN102457889B (en) | 2010-10-28 | 2010-10-28 | A kind of method and device reducing the common equipment interference of LTE and ISM |
| PCT/CN2011/070610 WO2012055178A1 (en) | 2010-10-28 | 2011-01-25 | Method and apparatus for reducing co-existence interference between lte and ism of one equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010524015.XA CN102457889B (en) | 2010-10-28 | 2010-10-28 | A kind of method and device reducing the common equipment interference of LTE and ISM |
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| CN102457889A CN102457889A (en) | 2012-05-16 |
| CN102457889B true CN102457889B (en) | 2016-03-30 |
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| CN201010524015.XA Expired - Fee Related CN102457889B (en) | 2010-10-28 | 2010-10-28 | A kind of method and device reducing the common equipment interference of LTE and ISM |
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| CN (1) | CN102457889B (en) |
| WO (1) | WO2012055178A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013166700A1 (en) * | 2012-05-11 | 2013-11-14 | 富士通株式会社 | Coexistence interference estimation method, user equipment, and base station |
| US9839040B2 (en) * | 2013-11-26 | 2017-12-05 | Echostar Technologies L.L.C. | Mitigating wireless interference |
| CN104754604B (en) * | 2013-12-31 | 2018-06-26 | 中国移动通信集团四川有限公司 | A kind of monitoring LTE is to the WLAN method, apparatus interfered and system |
| CN105682240B (en) * | 2014-11-21 | 2019-03-12 | 工业和信息化部电信研究院 | A kind of terminal device dispatching method and device |
| CN107277917A (en) * | 2017-05-31 | 2017-10-20 | 广东欧珀移动通信有限公司 | Communication frequency system of selection, device, storage medium and mobile terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101494476A (en) * | 2008-01-24 | 2009-07-29 | 中兴通讯股份有限公司 | Method and system for scheduling resource block |
| CN101572904A (en) * | 2008-04-28 | 2009-11-04 | 华为技术有限公司 | Method, device and system for controlling interference of UE to adjacent subdistrict |
| WO2010053119A1 (en) * | 2008-11-07 | 2010-05-14 | 京セラ株式会社 | Wireless communication system, radio base station and wireless communication method |
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| CN101577960B (en) * | 2008-05-06 | 2011-06-29 | 中国移动通信集团公司 | Method and device for adjusting power |
| CN101299891B (en) * | 2008-06-25 | 2012-07-04 | 中兴通讯股份有限公司 | Method for transmitting overload indicator report and method for encoding physics resource block interference state |
| CN101841356B (en) * | 2009-03-18 | 2012-12-26 | 电信科学技术研究院 | Method, device and system for feeding back channel quality information |
| CN101841819A (en) * | 2010-05-06 | 2010-09-22 | 工业和信息化部电信传输研究所 | Dispatching method for reducing interference of PDCCH of a plurality of small areas of LTE system and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101494476A (en) * | 2008-01-24 | 2009-07-29 | 中兴通讯股份有限公司 | Method and system for scheduling resource block |
| CN101572904A (en) * | 2008-04-28 | 2009-11-04 | 华为技术有限公司 | Method, device and system for controlling interference of UE to adjacent subdistrict |
| WO2010053119A1 (en) * | 2008-11-07 | 2010-05-14 | 京セラ株式会社 | Wireless communication system, radio base station and wireless communication method |
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| WO2012055178A1 (en) | 2012-05-03 |
| CN102457889A (en) | 2012-05-16 |
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