Leaky coaxial cable detection system and leaky coaxial cable detection method

Abstract

The invention provides a leaky coaxial cable detection system and a leaky coaxial cable detection method. The leaky coaxial cable detection system is connected between a plurality of access systems and leaky coaxial cables and comprises a first POI combiner and a second POI combiner, first TDR equipment and second TDR equipment which are correspondingly connected to the first POI combiner and the second POI combiner, and a bridge, wherein input ends of the first POI combiner and the second POI combiner are connected to the access systems and the corresponding first and second TDR equipment while output ends of the first POI combiner and the second POI combiner are respectively correspondingly connected to the inputs end of the bridge, and the output ends of the bridge are connected to the leaky coaxial cables. According to the leaky coaxial cable detection system and the leaky coaxial cable detection method, the technical effects of reducing the number of equipment of the system, the cost and the insertion loss, simplifying operating steps and easily detecting and checking a fault location condition of the leaky coaxial cable are realized.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a leaky cable detection system and a leaky cable detection method. Background technique [0002] With the construction of high-speed railways and subways, there are more and more mobile communication coverage scenarios for railways. The terrain characteristics of high-speed railways and subways are suitable for leaky cable coverage. In addition, there are many operators and communication systems. POI (POINT OF INTERFACE, multi-system combined road platform) ) plus leaky cable coverage scheme has become the current mainstream, in order to facilitate fault location in the tunnel, TDR (Time-Domain Reflectometry, Time Domain Reflectometry) is integrated into the POI monitoring. [0003] Such as figure 1 As shown, the traditional TDR equipment is connected at POI, because POI and antenna feeder docking ports are multi-channel (usually 2 or 4 channels), each channel needs a TDR dev...

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Problems solved by technology

[0003] like figure 1 As shown, the traditional TDR equipment is connected at POI, because POI and antenna feeder docking ports are multi-channel (usually 2 or 4 channels), each channel needs a TDR device, and the antenna feeder port of POI is connected to the antenna feeder distribution The system, that is, the leaky cable, each leaky cable contains all the signals that need to be covered, and the TDR equipment is "one-way detection", if the frequency is mixed, it will not be able to distinguish which way the fault occurs, so the TDR equipment can only be placed in the Near the leaky cable, the frequency band of the TDR device is usually selected outside the mobile communication frequency band. When it is placed in the subsequent stage, its detection signal needs a combiner to be connected to the leaky cable for transmission. After the combiner is added, the insertion loss will increase. The cost increases, and the cascade increases one level, which makes the standing wave of the coverage signal worse

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