Positioning system, positioning server, base station and terminal position estimating method

Abstract

There is provided a terminal location estimation method capable of accurately estimating a location of a mobile terminal when providing information services according to the location of the terminal in a radio communication system. A positioning server sends a location measurement probe message to the mobile terminal in order to measure the location of the terminal. Each of base stations receives a response message broadcasted from the terminal, measures the reception level and delay spread and sends the measurement results to the positioning server. The positioning server has a radio wave propagation estimating portion and a database for storing estimation results thereof. The server estimates the location of the terminal by checking the measurement results of the base stations against the estimation results on radio wave propagation stored in the database.

Description

technical field [0001] The present invention relates to a positioning system, a positioning server, a base station and a method for estimating a position of a terminal, in particular to a method for easily and accurately detecting the position of a mobile terminal using a radio communication system. Background technique [0002] In recent years, portable telephones have provided services consistent with the user's location using radio communication systems, and these services are generally called location information services. [0003] The following will use Figure 9 and 10 , which describes an example of a location service. Figure 9 is a block diagram of an example of a positioning system structure in the past. exist Figure 9 Among them, reference number 21 represents a positioning server, 200 represents the Internet, 22 represents a content server, 23-1 to 23-3 represent base stations, C-1 to C-3 represent cells covered by base stations 23-1 to 23-3, and 24 represent ...

AI Technical Summary

Problems solved by technology

But there is a problem here. In the case of a small number of base stations, the estimation of the terminal position resolution becomes rough

[0013] In addition, since the terminal measures electric field strength received from multiple base stations, in the case where the terminal has only one device for measuring electric field strength, there is a possibility that the measurement takes time and the terminal may move during the measurement

Although the measurement time can be shortened when the terminal has multiple measurement devices, terminals with multiple measurement devices may encounter problems in terms of size, cost and terminal power consumption

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