Method for indoor/outdoor call judgment

摘要

The indoor/outdoor call judgment method comprises the following steps. Firstly, to build an algorithm and indicator function for determining indoor/outdoor call by analyzing drive test data. Secondly, to retrieve the event log data to be judged by the method, and find the position of the retrieved event log data by means of geo-location tools. Thirdly, to determine whether the retrieved event log data are referring to a moving call, if “YES”, then the event log is determined to be referring to an outdoor call. Fourthly, to determine whether or not the event log data are referring to an Indoor call by using the pre-built algorithm and the indicator function. Users' behavior, Cell antenna module and signal strength difference are considered when building the algorithm and indicator function so as to increase the accuracy of the indoor/outdoor call judgment method.

主权项

1. An indoor/outdoor call judgment method, comprising the following steps:
Step (A): using a server for building at least one algorithm and indicator function for determining indoor/outdoor call, the algorithm and the indicator function are stored in a first database controlled by the server; Step (B): using the server to retrieve data of at least one event log from a second database, wherein said data of said event log are generated by call activities of at least one mobile device when said mobile device is telecommunicating with a base station; and then the server associating the retrieved event log data with a geographical position by means of a geo-location tool; Step (C): the server determining whether or not the event log is referring to a moving call; if the determining result is “YES”, then the event log is determined to be referring to an outdoor call and proceed with Step (E); if the determining result is “NO”, then proceed with Step (D); Step (D): the server determining whether or not the event log is referring to an indoor call by using the algorithm and indicator function stored in the first database; if the determining result is “YES”, then the event log is determined to be referring to the indoor call; if the result is “NO”; then the event log is determined to be referring to the outdoor call; and Step (E): the server ending the indoor/outdoor call judgment method; and wherein a process to build the algorithm and indicator function of Step (A) comprises the following steps:
Step (a1): the server acquiring another event log which is associated with its geographical position;Step (a2): the server finding at least one Cell whose signal strength pattern can cover said geographical position of said event log, and then building a measurement signal strength data base for the Cell according to said signal strength pattern;Step (a3): the server performing simulation of each said Cell's antenna pattern, and using a statistic method for finding the Cell's pattern for each grid region of the pattern, and then finding pattern of signal strength and time delay for each said Cell's coverage; andStep (a4): the server determining an indoor/outdoor signal strength indicator for each grid region by using the results of the simulation mentioned in Step (a3); and storing the indoor/outdoor signal strength indicators in the first database.