Detection method and apparatus

Abstract

The present invention discloses a detection method, it includes as follows. Calculating the ratio of the average power of ranging sub-carriers and the average power of protection zone carrier; comparing the above mentioned ratio with the scheduled threshold, and recording the ranging-code If it is less than or equal to the threshold; Accordingly, the implementation of this invention would provide a detection device, including: Computational modules, which could be used to calculate ratio of the average power of ranging sub-carriers and the average power of protection zone carrier; Comparison module, which could be used to compare the referred ratio to the predetermined threshold; The first processing unit, which could be used to record the detected ranging-codes, if the comparison results of the comparison unit is that described ratio is less than or equal to the threshold. Implementation of this invention could provide better technical solutions to the eliminate false alarms, and reduce the impact of user terminal access.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a detection method and a detection device. Background technique [0002] Uplink random access technology is a key technology in the field of wireless communication. Through the uplink access process, the synchronization of uplink signals arriving at the base station from the user terminal side is achieved. After receiving the broadcast message from the base station, the user terminal selects an uplink access code according to a certain algorithm in the allocated contention channel area and sends it to the base station. The base station uses code detection technology to measure the time delay and frequency offset between the user terminal and the base station. And power and other parameters, and these parameters are fed back to the user terminal through the downlink channel for adjustment. [0003] In the code detection process, there will be false alarms and missing alar...

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Problems solved by technology

[0022] During the research and practice of the prior art, the inventor found the following problems in the prior art: if the code detection threshold Detect_Hold is simply increased, the probability of missing alarms will increase, which will affect the access of user terminals

When the transmit power of the user terminal is small, the probability of missed alarm will be greater, and when the transmit power of the user terminal is slightly higher, according to the simulation results, there will be a certain amount of missed alarm

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