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MQTT-based RTCM-RTK precise positioning network system

A network system and precise positioning technology, applied in the field of satellite navigation signal processing, can solve problems such as inability to confirm network quality, and achieve the effect of good service quality

Active Publication Date: 2021-09-07
上海寰果信息科技有限公司
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Problems solved by technology

[0003]The server Caster implemented by the Ntrip protocol implements the mechanism of subscribing, publishing, distributing and forwarding messages through sourcelist. The message format is RTCM3.x, but Qos is not defined in the Ntrip protocol. It is the quality of message service. Under normal network conditions, the base station and the mobile station cannot directly confirm the network quality.

Method used

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  • MQTT-based RTCM-RTK precise positioning network system

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Embodiment Construction

[0016] The specific implementation of the MQTT-based RTCM-RTK precise positioning network system of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0017] See attached figure 1 , MQTT-based RTCM-RTK precise positioning network system, including Ntrip reference station sending unit, MQTT protocol unit, Kafka / Flink cluster unit and Ntrip client receiving unit, the Ntrip reference station sending unit converts input data into a separate MQTT The message is sent to the MQTT protocol unit. The MQTT protocol unit continuously receives the RTCM message and forwards it to the Kafaka / Flink cluster unit. The Kafaka / Flink cluster unit forms the RTCM message data into a virtual source address and continuously writes the data. The Ntrip client receives it The unit obtains the virtual source RTCM message data continuously released by the Kafaka / Flink cluster unit through the MQTT protocol unit to complete RTK positioning.

[0018] Wh...

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Abstract

The invention relates to the technical field of automatic information processing, and discloses an MQTT-based RTCM-RTK precise positioning network system, which comprises an Ntrip reference station sending unit, an MQTT protocol unit, a Kafka / Flink cluster unit and an Ntrip client receiving unit, and is characterized in that the Ntrip reference station sending unit converts input data into an independent MQTT message and sends the independent MQTT message to the MQTT protocol unit; the MQTT protocol unit continuously receives RTCM messages and forwards the RTCM messages to the Kafaka / Flink cluster unit; the Kafaka / Flink cluster unit enables RTCM message data to form a virtual source address and continuously writes data; and the Ntrip client receiving unit obtains the virtual source RTCM message data continuously issued by the Kafaka / Flink cluster unit through the MQTT protocol unit to complete RTK positioning. According to the invention, the Ntrip protocol and the MQTT protocol are combined to transmit the RTCM data, so that better service quality is achieved, and functions required by the NtripCaster are realized.

Description

technical field [0001] The invention relates to the technical field of satellite navigation signal processing, in particular to an MQTT-based RTCM-RTK precise positioning network system. Background technique [0002] Ntrip is different from the previous RTK direct transmission method. It first sends the observation data of multiple reference stations to the control center through the Internet network, and after further processing, it is broadcasted by mobile communication networks such as GPRS and CDMA. [0003] The server Caster implemented by the Ntrip protocol implements the mechanism of subscribing, publishing, distributing, and forwarding messages through sourcelist. The message format is RTCM3.x, but Qos is not defined in the Ntrip protocol, which is the message service quality. Under normal network conditions, it will As a result, the base station and the mobile station cannot directly confirm the network quality with each other. [0004] MQTT is an IoT transport pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04L29/08G01S19/43G01S19/03
CPCH04W64/00H04L67/12G01S19/43G01S19/03H04L67/562
Inventor 袁纯
Owner 上海寰果信息科技有限公司
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