Field intensity coverage communication system for railway weak field interval and communication method thereof

Abstract

The invention provides a field intensity coverage communication system for a railway weak field interval and a communication method of the field intensity coverage communication system. The system comprises a plurality of interval forwarding stations arranged in the whole communication interval, wherein each interval forwarding station converts the 450MHz signal into a 400KHz signal and connectedwith the communication terminal equipment through a 450MHz antenna; each interval forwarding station is coupled to a power overhead line system wire through a 400KHz antenna; 400KHz signals are sent to the whole communication section through a power contact network wire, and 450 MHz signals emitted by two adjacent section forwarding stations have 1 / 3 of crossed signal field intensity coverage areas with the signal intensity of more than 10dBuV. The system is applied to the technology of mutual conversion of 450MHz / 400KHz signals based on an interval forwarding station in a weak field tunnel interval, and solves the field intensity coverage problem of a railway 450MHz wireless communication system in the weak field tunnel interval.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a field strength coverage communication system and a communication method used in a weak field section of a railway. Background technique [0002] At present, the wireless train dispatching communication system in most electrified railway sections in my country uses the 450MHz frequency band for communication. Due to the mountainous and hilly terrain in my country, half of the railway lines are located in mountainous tunnels. These railway sections are blind areas for radio communication. The traditional scheme We mainly use repeaters plus leakage cables or optical fiber repeaters to strengthen the weak field to meet the needs of wireless train dispatching communication. However, these equipments have high investment and maintenance costs, large engineering quantities, and are difficult to install, debug and maintain. [0003] With the development of social economy, t...

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Problems solved by technology

[0002] At present, the wireless train dispatching communication system in most electrified railway sections in my country uses the 450MHz frequency band for communication. Due to the mountainous and hilly terrain in my country, half of the railway lines are located in mountainous tunnels. These railway sections are blind areas for radio communication. The traditional scheme We mainly use repeaters plus leakage cables or optical fiber repeaters to strengthen the weak field to meet the needs of wireless train dispatching communication. However, these equipments have high investment and maintenance costs, large engineering quantities, and difficulties in installation, commissioning and maintenance.

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