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COMMUNICATION SYSTEM, EDGE SERVER, FIRST BROKER, SECOND BROKER, METHOD AND STORAGE MEDIUM
COMMUNICATION SYSTEM, EDGE SERVER, FIRST BROKER, SECOND BROKER, METHOD AND STORAGE MEDIUM
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机译：通信系统，边缘服务器，第一经纪人，第二经纪人，方法和存储介质
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摘要
The present invention enables more reliable distribution of a message to a movable device, in publish/subscribe communications via a broker consisting of multiple stages. In an edge server 300, a message transmission and receiving unit 301 receives, from a first broker 400, a message transmitted from a management device 100 and directed to a device 200, or a message for which re-distribution was requested by another edge server 300 and which is directed to the device 200. The message transmission and receiving unit 301 transmits the received message to a second broker 500 for distribution to the device 200. When notified by the second broker 500 of a failure to distribute the message to the device 200, a request destination determination unit 302 determines another edge server 300 to serve as a re-distribution request destination. A re-distribution request unit 303 transmits, to the first broker 400, the message directed to the device 200, in order to make a request for re-distribution to the determined other edge server 300.
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