Method for detecting events on cellular comm. network
a cellular communication network and event detection technology, applied in the direction of radio/inductive link selection arrangement, electrical apparatus, selection arrangement, etc., can solve the problems of not having the ability, and practically impossible to solve each such even
Inactive Publication Date: 2009-07-23
AVNI OFER +1
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Problems solved by technology
A sporadic cellular comm. network event, such as dropped telecommunication call or quality related handover, can be caused by many factors, among which may be a problematic handset unit, temporary blocking element (e.g. a truck on the route), etc. solving each such event is practically impossible, and many time not important for network overall performance.
Currently used systems to monitor network performance, provide the problems in cell-sector resolution, which means that problems from many routes, houses, elevators and basements are within the same cell sector, without the ability to differentiate a cluster of problems caused by a specific phenomena, thus without the ability to sort these problems by importance and without the ability to isolate the cause for each problem and solve it.
Dropped telecommunication calls at a specific cell ‘A’, can be caused all around the cell coverage area and due to numerous reasons, and analyzing them as a group will not provide a solution in most cases.
In every cellular comm. network there are many problems that are not caused due to lack of coverage, but due to network management problems such as wrong handover parameters or bad frequency allocation.
Many times test drives can't detect a problem since its mobile unit equipment is different from the handsets used by a variety of mobile users.
In addition, test drives only sample the routes and have low probability to detect problems (For example, to detect a severe drop that happens for 4% of the calls 25 test drives are required in average, and it will still look like a sporadic problem, and not persistent).
Some of these problems may only appear in certain times due to network load or other temporary conditions, thus can't be observed by sporadic drive test.
However, this method has the following limitations:A special software / hardware needs to be installed in the handsetOnly a small fraction of the handsets report their problems (you need to get approval from the user to use this software and violate its privacy, and the communication load involved is much too large for the network to function with)The number of reporting phones is limited also since the reporting process is loading the cellular comm. network
Kennedy does not teach or provide a solution to the very common problem in metropolitan areas of the same handovers relating to several different routes.
Sending this data requires deploying location system at the cellular comm. network (like triangulation at the ABIS level) or at the handset (like GPS component) which are very expensive.
In addition, sending all the location data to a central server is not realistic since the communication resources required by the network will shut down the cellular comm. network completely, and in many of the countries this is forbidden due to privacy violation.
These methods are also not relevant for in-building events for many reasons: GPS receivers for example, have problem connecting to satellites from within buildings.
Triangulation methods suffer from significant in-accuracy due to multi-path in buildings, etc.
Furthermore, if the cellular comm. network changes—the calibration should be repeated, otherwise the data will not be accurate as needed.
This process requires a lot of overhead in installing and maintaining such a system.
In addition, the events that led to the problem are not known and can't be analyzed to solve the problem.
In many of the these cases, significant network resources are invested in detecting the location of each problem, while many of them are sporadic problems that will not require any change in the network, and these location resources were invested for nothing.
Method used
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[0022]Detecting Related Events on the Cellular Comm. Network
[0023]An example of detecting related or repeating events is disclosed. A matching stage can be the first stage of the method. At this stage a sequences database is created, containing sequences of events extracted from the control channel of the cellular comm. network, (some times called also “signaling data”) which has a relevant characteristic. Such characteristic can be for example the appearance of dropped telecommunication call at the end of a sequence, the appearance of call quality problem (such as a handover for which the reported cause, specified within the message, is uplink or downlink quality) during the sequence, the appearance of specific cell or cells relevant for a required area, bandwidth problem or any other specific event of interest. Such events may include cell / sector ID, radio frequencies (which can be correlated with Cell / section), location area, service area etc. Additional information, for example ...
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A system and method that detects related events in the cellular comm. network and its derivatives with minimum overhead and in a changing cellular environment, both in the installation stage of a system, as well as during continuous operation.
Description
TECHNICAL FIELD[0001]This invention relates generally to detecting related events on the cellular comm. network for extracting data related to mobile phones and network conditions.BACKGROUND[0002]A sporadic cellular comm. network event, such as dropped telecommunication call or quality related handover, can be caused by many factors, among which may be a problematic handset unit, temporary blocking element (e.g. a truck on the route), etc. solving each such event is practically impossible, and many time not important for network overall performance. Currently used systems to monitor network performance, provide the problems in cell-sector resolution, which means that problems from many routes, houses, elevators and basements are within the same cell sector, without the ability to differentiate a cluster of problems caused by a specific phenomena, thus without the ability to sort these problems by importance and without the ability to isolate the cause for each problem and solve it. ...
Claims
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IPC IPC(8): H04Q7/20
CPCH04W24/08
Inventor AVNI, OFERKAPLAN, YOSSI
Owner AVNI OFER
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