Radio access point testing apparatus

Abstract

In a case where reception power in a radio access point is high by external noise, the normalcy of the radio access point is tested. In order to judge the normalcy of the radio characteristic of the radio access point, a test is performed through the calling connection between a testing access terminal in the radio access point and a predetermined device. An RSSI is measured before and after the transmission of a test signal. When the RSSI exceeds a threshold value, the path loss of a reverse link connected from the radio access point to the testing access terminal is increased by an attenuator. Then, reception power in the testing access terminal decreases. Thus, initial transmission power in accordance with the reception power from the testing access terminal is raised and the calling connection of the testing access terminal can be performed even under the external noise.

Description

BACKGROUND OF THE INVENTION [0001] The present invention relates to a radio access point testing apparatus, and more particularly to a radio access point testing apparatus which confirms the normalcy of the radio characteristic of a radio access point in an environment where interfering waves such as external noise mix into the radio access point in a mobile communication system employing a CDMA format. [0002] In servicing the mobile communication system, the stability of the system is one of important factors. For the stable operation of the system, it is required to prevent the occurrence of any failure leading to a system service shutdown, and also to promptly detect the failure and resume the system operation in case of the occurrence of the failure. Accordingly, the failure detection of the radio access point and a diagnostic scheme therefor are very important. [0003] As an example of a method for diagnosing the normalcy of the radio access point, JP-A-2002-271280 (Patent Docum...

AI Technical Summary

Benefits of technology

[0026] The other means (second means) for solving the second problem is to superpose white noise on a signal from the testing access terminal, whereby the test signal is fed to the radio access point as a signal which, in itself, holds a certain CIR (Carrier to Interference Ratio), and this test signal is set at a sufficiently high level relative to the external noise. With this method, the white noise of known level can be employed, so that the reception quality of the test signal from the testing access terminal can be calculated more precisely than in the first resolution means stated above. The CIR of the test signal is determined by the ratio between the level of the white noise and the transmission level of the test signal, and it is adjusted to a value which is required for satisfying a desired PER and which does not have a very wide margin. Thus, in a case where the degradation of the radio characteristic has occurred due to any hardware failure, it appears as the degradation of a PER in the forward link, and hence, the abnormalcy of the radio characteristic can be decided.

[0033] said attenuator increases the path loss in accordance with a value of the reception power measured in said measurement part, thereby to decrease the reception power in said terminal function portion and to consequently increase the initial transmission power;

[0060] According to the present invention, it can provide a radio access point testing apparatus which excludes the influence of external noise, and which can carry out the normalcy confirming test of a radio access point even under an environment where the external noise exists. According to the present invention, it can carry out a test normally without the influence of external noise on a test result. Still another object of the invention is to specify any abnormal test result as being ascribable to the abnormalcy of the side of a radio access point apparatus, not to the influence of external noise.

Problems solved by technology

On this occasion, it is difficult to discriminate whether the high transmission power is influenced by the external noise or is caused by the radio characteristic degradation of the access point.

As one of the problems (the first problem), the test might fail in a calling connection for the reason that an originating signal from the testing terminal does not reach the access point.

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