Communication method and communication device
A communication method and client-side technology, applied in the field of communication, can solve problems such as reduced message forwarding performance, and achieve the effects of ensuring security and efficiency, ensuring security and improving efficiency
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[0077] The following is a brief introduction to the concepts in the MQTT protocol.
[0078] In the MQTT protocol, the subscriber is the message consumer, and the publisher is the message generator. The relationship between the subscriber and the publisher is referred to as the topic ( topic) and topic filter (topic filter, TF) to establish a "connection". For the MQTT protocol, both message generators and message consumers are collectively referred to as clients.
[0079] MQTT message subscription and publishing are implemented based on topic names and topic filters. Therefore, topics are a bridge between subscribers in MQTT, which is very important. The concepts of topic names and topic filters are as follows:
[0080] Topic Name: The topic of the message publishing, which is a "clear" topic, and wildcards cannot be used.
[0081] Topic filter: The topic of the message subscription, which can contain special wildcards, allowing you to subscribe to multiple topics at a time. ...
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