Mobile station location aid device and location aid method thereof

Abstract

The invention relates to a positioning auxiliary device for a mobile station and an auxiliary positioning method thereof. The device includes: uplink and downlink communication modules, a baseband signal processing and control module, a positioning signal transmitting module, a positioning signal transmitting control module, and two radio frequency antennas. The method is as follows: the main base station notifies the mobile station positioning assistance device to transmit a downlink wireless signal similar to the base station pilot signal, and sends the information of the mobile station positioning assistance device to the mobile station; the mobile station receives and measures the mobile station positioning assistance The downlink wireless signal transmitted by the device and the pilot signal transmitted by the adjacent base station, the position estimation unit estimates the position of the mobile station according to the measurement results of the mobile station. The implementation of the present invention does not increase the complexity of the mobile station, and the communication link with the main base station and the downlink path transmitted by the device work independently, effectively ensuring the reliability of the communication link and the transmission of downlink wireless signals the quality of.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a mobile station positioning assistance device and a positioning assistance method thereof. Background technique [0002] With the development of wireless communication technology, the requirement for the accuracy of mobile station positioning in wireless communication system is getting higher and higher. At present, there are three main mobile station positioning methods: [0003] The first is the mobile station positioning method based on cell identification: which cell the mobile station accesses, the location of the base station where the cell is located is taken as the result of mobile station positioning. Therefore, this method cannot provide high-precision mobile station positioning results ; [0004] The second is the mobile station positioning method based on the wireless cellular network: the mobile station measures the downlink signals transmitted by s...

AI Technical Summary

Problems solved by technology

[0006] The second and three positioning methods all locate the mobile station by measuring the propagation delay of the wireless signal, so the accuracy of its positioning depends on whether the mobile station can accurately measure the wireless signal; In the environment of the propagation path, the application of these two methods can ensure the positioning accuracy of the mobile station. However, for the bustling urban environment, due to the presence of dense buildings, it is often impossible to provide visual communication of wireless signals between the mobile station and the base station. path, and the loss of the wireless propagation path is very large, so that the mobile station cannot accurately measure the wireless signal, or it cannot measure the wireless signal at all. Therefore, if the two methods are still used in the bustling urban environment , the positioning accuracy of the mobile station cannot be guaranteed

Since this method transmits a fixed segment of positioning signal different from the downlink signal transmitted by the base station side, the mobile station must distinguish between the signals of the detection positioning unit and the base station; this increases the complexity of the equipment and algorithm implementation on the mobile station side Spend

[0009] In addition, the positioning unit in this method has only one antenna system, and the interactive communication between the positioning unit and the control base station, as well as the transmission of downlink positioning signals, time-division multiplex this set of antenna systems, that is, the radio frequency signal transmitting part of the positioning unit. Time-division multiplexing is required to carry out and control the transmission of uplink communication signals between base stations, as well as the transmission of downlink positioning signals; in cellular wireless communication systems, the radio frequency intervals of uplink and downlink generally have tens of megabytes, so such a large bandwidth And have good performance RF linear power amplifier and RF bandpass filter, very difficult

Therefore, if this method is used for mobile station positioning to achieve the corresponding positioning accuracy, there must be a high implementation cost.

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