CN103916887B - The adjacent area leakage localization method positioned based on grid - Google Patents
The adjacent area leakage localization method positioned based on grid Download PDFInfo
- Publication number
- CN103916887B CN103916887B CN201210594718.9A CN201210594718A CN103916887B CN 103916887 B CN103916887 B CN 103916887B CN 201210594718 A CN201210594718 A CN 201210594718A CN 103916887 B CN103916887 B CN 103916887B
- Authority
- CN
- China
- Prior art keywords
- cell
- grid
- accounting
- neighboring
- downstream signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of adjacent area leakage localization method positioned based on grid, comprises the following steps：The serving cell and its downstream signal strength information where record has current mobile station in whole measurement report MR, the MR in default network range are obtained at the measurement moment；Longitude and latitude positioning is carried out to the measurement report MR of the acquisition, and carries out there are corresponding MR numbers in grid division, each grid to the network range；Service cell information according to where the current mobile station recorded in each MR, count the first accounting cell, the second accounting cell, the 3rd accounting cell of each grid, according to the MR numbers accounting and downstream signal intensity difference of the cell pair that neighboring BS relationship is not present in first, second, third accounting cell in single grid, it is determined that there may be the cell of miss-configured neighboring cells to C1, C2.The present invention also improves network quality while the efficiency of Neighborhood Optimization is improved.
Description
Technical field
The present invention relates to moving communicating field, a kind of adjacent area leakage localization method positioned based on grid is particularly related to.
Background technology
In mobile subscriber's communication process, in order that call setup is in best cell, while in order that calling with
It is unlikely to call drop during the moving process at family, just introduces switching.In brief, switching is exactly small from one in order to meet mobile station
Call can continue swimmingly to carry out when area is moved to another cell.Mobile station moves call in A cells, when from A cells
More and more remote, the signal intensity for receiving A cells is more and more weaker, and more and more nearer from B cells, is accomplished by triggering switching this when
Process, and the precondition switched is：B cells are the adjacent areas of A cells, and the level intensity of B cells that moving table measuring is arrived
When meeting certain condition, mobile station successfully could be switched to B cells from A cells, otherwise, and mobile station can be always in A
Cell, because level intensity is more and more weaker, eventually results in call drop, influence user perceives and network quality.
Therefore rational neighboring BS relationship is that network quality and user perceive the required of guarantee.The neighboring BS relationship of redundancy can influence
The precision of measurement report and switching duration, can pass through the amount of switched of neighboring interval, the distance of neighboring interval and the level of neighboring interval
Distribution and MR（Measure Report, measurement report）Distribution situation is used as assessment and judges whether that redundancy adjacent area is closed
System；Neighboring BS relationship missing then can cause mobile station can not be kept clear in communication process.And the inspection method of miss-configured neighboring cells compared with
Much less is wanted for the inspection method of redundancy adjacent area.
Traditional miss-configured neighboring cells inspection method is：The more cells of handoff failure are counted, according to cell in geographical position
On distribution, the deflection of cell, and the switching direction and amount of switched of cell judge that it is adjacent which cell there may be leakage
The phenomenon in area.Obtained judged result is often what human subjective judged, without very strong data foundation.
There is a kind of mode for adding measurement frequency point to find out the adjacent area of leakage in addition.It is exactly equipment vendors by adjacent area frequency
Outside BCCH（Broadcast Control Channel, BCCH）Frequency is added to BA（Measurement frequency point）In table,
The signal intensity of all frequencies in mobile station meeting automatic measurement BA tables, in the active mode, mobile station can be in the frequency measured
In, after the signal intensity for comparing each frequency, report signal intensity most strong 6 BCCH frequencies, and corresponding BSIC codes
（Base Station Identity Code, base station identity code）, the corresponding corresponding cell of BCCH with BSIC codes.When this 6
Occur in that the frequency outside the dominant frequency of cell adjacent area in BCCH frequencies, and the number of times occurred it is very frequent when, then it may determine that
Go out the neighboring BS relationship of the small leakage, and specific cell is found according to BCCH frequencies and BSIC codes.
Traditional miss-configured neighboring cells inspection method is relatively simple, too serious simply by the factor of subjective judgement, it is more likely that
The neighboring BS relationship of redundancy can be increased.
And the methods of miss-configured neighboring cells is checked by adding measurement frequency point comparatively, Reliability will be improved a lot, but
It is also to have limitation：
First, addition measurement frequency point needs the support of equipment manufacturer personnel, and the third party engineer of non-equipment manufacturer may
It can not be operated；
Secondly as the limited length of BA tables is determined, if addition measurement frequency point does not have purpose, the frequency to the whole network is needed
Point, which is conducted batch-wise, to be added and measures, and could all be checked the neighboring BS relationship of omission and be come, the cycle is longer, and need to reduce original
The measurement frequency point come.
In addition, not accounting for base station distribution and the factor of geographical environment.Cover up caused by some non-miss-configured neighboring cells
Network problem.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of adjacent area leakage localization method positioned based on grid, to overcome
The subjectivity and limitation of existing miss-configured neighboring cells inspection method.
In order to solve the above technical problems, embodiments of the invention offer technical scheme is as follows：
The embodiment of the present invention provides a kind of adjacent area leakage localization method positioned based on grid, comprises the following steps：
Record in whole measurement report MR, the MR in default network range is obtained at the measurement moment current movement
Serving cell and its downstream signal strength information where platform；
Longitude and latitude positioning is carried out to the measurement report MR of the acquisition, and grid division is carried out to the network range, often
There are corresponding MR numbers in individual grid；
Service cell information according to where the current mobile station recorded in each MR, counts the first of each grid
Accounting cell, the second accounting cell, the 3rd accounting cell, wherein, the first accounting cell be single grid in MR numbers accounting most
Many cells；Second accounting cell is the cell that MR number accountings are number two in single grid；3rd accounting cell is single
The cell that MR numbers accounting is number three in grid；
According to the MR numbers for the cell pair that neighboring BS relationship is not present in first, second, third accounting cell in single grid
Accounting and downstream signal intensity difference, it is determined that there may be the cell of miss-configured neighboring cells to C1, C2.
Wherein, further comprise：
Determine the grid sets that cell C1, C2 is collectively covered；
Calculate cell C1 and C2 virtual neighboring BS relationship degree coefficient：
(N11*X11+N12*X12+N13*X13+N14*X14+……+N1i*X1i)/N11+N12+N13+……+N1i)
(N21*X21+N22*X22+N23*X23+N24*X24+……+N2i*X2i)/(N21+N22+N23+……+N2i)
Wherein, N1i, N2i are respectively MR number of cell C1, C2 in the grid i collectively covered；X1i, X2i are respectively
Weighted value corresponding to average downstream signal intensity of cell C1, C2 in the grid i collectively covered, according to preset rules, no
The different weighted value with signal strength range correspondence；
If the virtual neighboring BS relationship degree coefficient in the grid sets is above predetermined threshold value, cell C1, C2 is judged
For adjacent area.
Wherein, the MR numbers in each grid should be higher than that default sample number thresholding.
Wherein, it is described according to the cell pair that neighboring BS relationship is not present in first, second, third accounting cell in single grid
MR numbers accounting and downstream signal intensity difference, it is determined that there may be the step of cell of miss-configured neighboring cells is to C1, C2, including：
It is higher than default accounting thresholding, and downstream signal intensity if there is no the MR numbers accounting of the cell pair of neighboring BS relationship
Difference is less than pre-determined absolute thresholding, then judges that cell may miss-configured neighboring cells to C1, C2.
Wherein, the default accounting thresholding is 20%.
Wherein, the downstream signal intensity difference is less than 5.
Wherein, the grid quantity in the grid sets that cell C1, C2 is collectively covered should be greater than preset thresholding.
Embodiments of the invention have the advantages that：
Compared with the method for traditional inspection miss-configured neighboring cells, the present invention is not only combined with geographical position, while
The level intensity of cell and the factor of MR distributions are combined, makes to check that the result come more has foundation；With addition measurement frequency point
Method is compared, and the operation without equipment manufacturer first can be carried out, and so provides the convenience of Neighborhood Optimization；Secondly, exist
In the case of the level and Mr of cell, while the factor in the geographical position also in relation with cell, closer to actual conditions.This
Outside, the present invention orients the adjacent area come, can also be as the foundation for adding measurement frequency point, to be leaked using the inspection of addition measurement frequency point
The method of matched adjacent zone provides frequency foundation, while the efficiency of Neighborhood Optimization is improved, also improves network quality.
Brief description of the drawings
Fig. 1 is the adjacent area leakage localization method flow chart positioned based on grid described in the embodiment of the present invention.
Fig. 2 is the method flow diagram further confirmed that to possible miss-configured neighboring cells described in the embodiment of the present invention.
Fig. 3 is the flow chart judged possible miss-configured neighboring cells described in the embodiment of the present invention.
Fig. 4 is the stream judged by neighboring BS relationship degree coefficient possible miss-configured neighboring cells described in the embodiment of the present invention
Cheng Tu.
Embodiment
To make embodiments of the invention technical problem, technical scheme and the advantage to be solved clearer, below in conjunction with
Drawings and the specific embodiments are described in detail.
Embodiments of the invention are positioned for the limitation of detection miss-configured neighboring cells in the prior art there is provided one kind based on grid
Adjacent area leakage localization method, as shown in figure 1, comprising the following steps：
Step 101：Obtaining to record in whole measurement report MR, the MR in default network range at the measurement moment has
Serving cell and its downstream signal strength information where current mobile station；
Step 102：Longitude and latitude positioning is carried out to the measurement report MR of the acquisition, and grid is carried out to the network range
Divide, there are corresponding MR numbers in each grid；
Step 103：Service cell information according to where the current mobile station recorded in each MR, counts each grid
The first accounting cell, the second accounting cell, the 3rd accounting cell of lattice, wherein, the first accounting cell is MR in single grid
The most cell of number accounting；Second accounting cell is the cell that MR number accountings are number two in single grid；3rd accounting is small
Area is the cell that MR number accountings are number three in single grid；
Step 104：According to the cell pair that neighboring BS relationship is not present in first, second, third accounting cell in single grid
MR numbers accounting and downstream signal intensity difference, it is determined that there may be the cell of miss-configured neighboring cells to C1, C2.
Preferably, as shown in Fig. 2 be further judge miss-configured neighboring cells presence, can also include：
Step 105：Determine the grid sets that cell C1, C2 is collectively covered；
Step 106：Calculate cell C1 and C2 virtual neighboring BS relationship degree coefficient：
(N11*X11+N12*X12+N13*X13+N14*X14+……+N1i*X1i)/N11+N12+N13+……+N1i)
(N21*X21+N22*X22+N23*X23+N24*X24+……+N2i*X2i)/(N21+N22+N23+……+N2i)
Wherein, N1i, N2i are respectively MR number of cell C1, C2 in the grid i collectively covered；X1i, X2i are respectively
Weighted value corresponding to average downstream signal intensity of cell C1, C2 in the grid i collectively covered, according to preset rules, no
The different weighted value with signal strength range correspondence；
Step 107：If the virtual neighboring BS relationship degree coefficient in the grid sets is above predetermined threshold value, judge small
Area C1, C2 are adjacent area.
Specifically, in above-mentioned steps 102, it is possible to use 100*100 grid counts the master of single grid region
Coverage cell.For example, by the MR of the whole network according to MR location algorithms carry out longitude and latitude positioning, then by network carry out 100*100 grid
Lattice are divided, and each grid has corresponding MR numbers.
In above-mentioned steps 103, the main coverage cell of each grid can be counted, that is, introduces the first accounting small
Area, the second accounting cell, the concept of the 3rd accounting cell（More than 99% situation：First accounting cell, the second accounting cell and
The MR numbers summation of 3rd accounting cell exceedes the 90% of grid sum）.
As described above, the first accounting cell refers in single grid, and the most cell definitions of MR number accountings account for for first
Compare cell；Second accounting cell refers to that in single grid the cell definitions that MR number accountings are number two are that the second accounting is small
Area；3rd accounting cell refers to that in single grid the cell definitions that MR number accountings are number three are the 3rd accounting cell.
The downstream signal intensity and MR numbers of first accounting cell, the second accounting cell and the 3rd accounting cell reflect substantially
The coverage condition of single grid region.
In above-mentioned steps 104, it is possible to use the first accounting cell in grid, the second accounting cell, the 3rd accounting is small
The signal intensity and MR numbers in area there may be the cell pair of miss-configured neighboring cells to find.
As shown in figure 3, can first determine whether whether the MR sample numbers in single grid are enough（Step 301）；If reached
Sample number requirement has been arrived, then has continued to judge the first accounting cell, whether 3 minizones of the second accounting cell and the 3rd accounting cell
There is the cell pair in the absence of neighboring BS relationship（Step 302）；If it is present continuing judgement in the absence of the cell pair of neighboring BS relationship
Whether MR accountings meet the requirements（Step 303）, for example, in the absence of neighboring BS relationship cell MR accountings more than 20%；If symbol
Close and require, then continue to judge whether the difference in signal strength of the minizone in the absence of neighboring BS relationship meets the requirements（Step 304）, for example
It is less than 5 in the absence of the absolute value of the difference in signal strength between the cell of neighboring BS relationship；If still conforming to require, it may determine that
The cell of neighboring BS relationship is not present to being probably miss-configured neighboring cells in the two（Step 305）.
It is that can determine that possible miss-configured neighboring cells by said process, next can further determines that the neighboring BS relationship of leakage,
As shown in figure 4, first, it is determined that whether same cell meets thresholding to the grid number of covering（Step 401）, according to single grid
The miss-configured neighboring cells cell pair of statistics, statistics cell is to the grid number that collectively covers（Grid number needs to meet certain door
Limit）, and form grid sets；Then, judge whether the neighboring BS relationship degree system of cell pair meets thresholding（Step 402）.
The virtual neighboring BS relationship degree coefficient of each cell in computation grid group, introduces the general of virtual neighboring BS relationship degree coefficient
Read, set up virtual adjacent area assessment algorithm, be estimated come the virtual neighboring BS relationship of 2 cells to cell pair.
Wherein, the weight of each level range can be defined first：
For there are the grid sets with a pair of possible miss-configured neighboring cells, the neighboring BS relationship degree coefficient of 2 cells is estimated,
Algorithm is as follows：
N is MR number of the cell in certain grid；
Rxlev_dl is average downstream signal intensity of the cell in some grid；
Cell C1 virtual neighboring BS relationship degree coefficient is：
(N11*X11+N12*X12+N13*X13+N14*X14+……+N1i*X1i)/(N11+N12+N13+……+N1i)
Cell C2 virtual neighboring BS relationship degree coefficient is：
(N21*X21+N22*X22+N23*X23+N24*X24+……+N2i*X2i)/(N21+N22+N23+……+N2i)
Wherein, X value depends on average downstream signal intensity of the cell in each grid, average downstream signal intensity category
In which level range, then the level weighted value of correspondence level range is taken：X.
In grid sets, virtual neighboring BS relationship degree coefficient is higher（Virtual neighboring BS relationship degree coefficient thresholding can be according to existing
Net situation is adjustable）Cell to then can determine that as miss-configured neighboring cells, it is proposed that addition neighboring BS relationship.
In each method embodiment of the present invention, the priority that the sequence number of each step can not be used to limit each step is suitable
Sequence, for those of ordinary skill in the art, on the premise of not paying creative work, the priority to each step changes
Within protection scope of the present invention.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of adjacent area leakage localization method positioned based on grid, it is characterised in that comprise the following steps：
Record in whole measurement report MR, the MR in default network range is obtained at the measurement moment current mobile station institute
Serving cell and its downstream signal strength information；
Longitude and latitude positioning is carried out to the measurement report MR of the acquisition, and grid division, each grid are carried out to the network range
There are corresponding MR numbers in lattice；
Service cell information according to where the current mobile station recorded in each MR, counts the first accounting of each grid
Cell, the second accounting cell, the 3rd accounting cell, wherein, the first accounting cell is that MR numbers accounting is most in single grid
Cell；Second accounting cell is the cell that MR number accountings are number two in single grid；3rd accounting cell is single grid
The cell that interior MR numbers accounting is number three；
According to the MR number accountings for the cell pair that neighboring BS relationship is not present in first, second, third accounting cell in single grid
And downstream signal intensity difference, it is determined that there may be the cell of miss-configured neighboring cells to C1, C2；
Wherein, the MR according to the cell pair that neighboring BS relationship is not present in first, second, third accounting cell in single grid
Number accounting and downstream signal intensity difference, it is determined that the step of cell of miss-configured neighboring cells is to C1, C2 is there may be, including：
It is higher than default accounting thresholding if there is no the MR numbers accounting of the cell pair of neighboring BS relationship, and downstream signal intensity difference is low
In pre-determined absolute thresholding, then judge that cell may miss-configured neighboring cells to C1, C2.
2. according to the method described in claim 1, it is characterised in that further comprise：
Determine the grid sets that cell C1, C2 is collectively covered；
Calculate cell C1 and C2 virtual neighboring BS relationship degree coefficient：
(N11*X11+N12*X12+N13*X13+N14*X14+……+N1i*X1i)/N11+N12+N13+……+N1i)
(N21*X21+N22*X22+N23*X23+N24*X24+……+N2i*X2i)/(N21+N22+N23+……+N2i)
Wherein, N1i, N2i are respectively MR number of cell C1, C2 in the grid i collectively covered；X1i, X2i are respectively cell
Weighted value corresponding to the average downstream signal intensity of C1, C2 in the grid i collectively covered, according to preset rules, difference letter
The different weighted values of number strength range correspondence；
If the virtual neighboring BS relationship degree coefficient in the grid sets is above predetermined threshold value, judge cell C1, C2 as neighbour
Area.
3. according to the method described in claim 1, it is characterised in that the MR numbers in each grid should be higher than that default sample
Number thresholding.
4. according to the method described in claim 1, it is characterised in that the default accounting thresholding is 20%.
5. according to the method described in claim 1, it is characterised in that the downstream signal intensity difference is less than 5.
6. method according to claim 2, it is characterised in that the grid in the grid sets that cell C1, C2 is collectively covered
Lattice quantity should be greater than preset thresholding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210594718.9A CN103916887B (en) | 2012-12-31 | 2012-12-31 | The adjacent area leakage localization method positioned based on grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210594718.9A CN103916887B (en) | 2012-12-31 | 2012-12-31 | The adjacent area leakage localization method positioned based on grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103916887A CN103916887A (en) | 2014-07-09 |
| CN103916887B true CN103916887B (en) | 2017-11-03 |
Family
ID=51042198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210594718.9A Active CN103916887B (en) | 2012-12-31 | 2012-12-31 | The adjacent area leakage localization method positioned based on grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103916887B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106714111A (en) * | 2015-07-29 | 2017-05-24 | 中国移动通信集团设计院有限公司 | Positioning method and device for measuring report |
| CN106792789B (en) * | 2015-11-24 | 2020-08-18 | 中国移动通信集团安徽有限公司 | Method and device for identifying missing neighbor cell |
| CN106937292B (en) * | 2015-12-31 | 2020-05-19 | 亿阳信通股份有限公司 | Grid division method and device |
| CN108462938A (en) * | 2018-03-09 | 2018-08-28 | 深圳市网信联动通信技术股份有限公司 | It is a kind of to position overlapping covered method and system based on 4/5G mobile communications networks |
| CN114339843B (en) * | 2020-09-27 | 2023-08-15 | 中国移动通信集团浙江有限公司 | Anchor point problem identification method and device based on network coverage |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453747A (en) * | 2008-10-31 | 2009-06-10 | 中国移动通信集团北京有限公司 | Telephone traffic prediction method and apparatus |
| CN101646201A (en) * | 2009-09-11 | 2010-02-10 | 上海华为技术有限公司 | Method, device and system for determining terminal position |
| CN101730114A (en) * | 2009-11-16 | 2010-06-09 | 深圳市优网科技有限公司 | Determining method and device of neighbor cells |
| CN102572770A (en) * | 2011-12-28 | 2012-07-11 | 中兴通讯股份有限公司 | Method and base station for adding omissively-configured adjacent domains |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009113951A1 (en) * | 2008-03-13 | 2009-09-17 | Telefonaktiebolaget L M Ericsson (Publ) | Neighbour cell quality measurement in a telecommunications system |
-
2012
- 2012-12-31 CN CN201210594718.9A patent/CN103916887B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453747A (en) * | 2008-10-31 | 2009-06-10 | 中国移动通信集团北京有限公司 | Telephone traffic prediction method and apparatus |
| CN101646201A (en) * | 2009-09-11 | 2010-02-10 | 上海华为技术有限公司 | Method, device and system for determining terminal position |
| CN101730114A (en) * | 2009-11-16 | 2010-06-09 | 深圳市优网科技有限公司 | Determining method and device of neighbor cells |
| CN102572770A (en) * | 2011-12-28 | 2012-07-11 | 中兴通讯股份有限公司 | Method and base station for adding omissively-configured adjacent domains |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103916887A (en) | 2014-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103916887B (en) | The adjacent area leakage localization method positioned based on grid | |
| CN104811989B (en) | A kind of interfered cell determines method and device | |
| CN103974316B (en) | A kind of method and device that control user equipment measures | |
| CN103906121B (en) | A kind of method and device of localized external interference | |
| CN102474742A (en) | Interference mitigation in a femtocell access point | |
| CN106792617B (en) | Boundary user determining method, charging method and device | |
| CN102075902B (en) | Method and device for determining new neighbor cell of serving cell | |
| CN102340815B (en) | Method, device and system for testing coverage performance of time division-synchronous code division multiple access (TD-SCDMA) network | |
| CN103596650B (en) | The method and the network equipment of radio network information management | |
| WO2016086607A1 (en) | Method and apparatus for determining antenna fault, and terminal | |
| CN101695173A (en) | Cell-skipping evaluation method and device | |
| CN109845302A (en) | System and method for automatic identification and optimization overshoot cell | |
| CN105722114A (en) | Method and apparatus for analyzing downlink interference of LTE network | |
| CN108696888B (en) | Method and device for determining overlapped coverage cell | |
| KR20140044581A (en) | Method and apparatus for cell outage deteion and transmit power control | |
| CN107438251B (en) | Method and device for distinguishing indoor and outdoor users | |
| CN110475274B (en) | Method for identifying abnormal AP in mobile positioning technology | |
| EP2861018B1 (en) | Method for determining neighboring base station, base station and processing network element | |
| WO2016090841A1 (en) | Gsm network switching failure management method and device | |
| CN108540299B (en) | Network fault positioning processing method and device | |
| CN110267277B (en) | MDT-based cell equalization degree evaluation method | |
| CN111866847B (en) | Mobile communication network data analysis method, equipment and computer storage medium | |
| CN105744574A (en) | Adjacent region optimization method and apparatus | |
| CN102131220B (en) | Method for identifying and processing adjacent cell configuration errors | |
| EP3598789A1 (en) | Optimized determination method and device for pci confusion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |