Radio communication system

Abstract

Based on slave information from a master device (1) (a maximum number of connectable slaves Nmax and an address reporting period) and on a device number #n that is set locally, slave devices calculate address information reporting timing and, after a delay, report the local address information (a logical address and a communication address) to the master device with each period. Each time address information is received, the master device stores a combination of the logical address and the communication address, and if, at the time of this storing, a logical address matching the received logical address has already been stored, checks the communication address that is stored in combination with that logical address, and if the received communication address does not match, determines that the received logical address is redundant.

Description

technical field [0001] The present invention relates to a wireless communication system composed of a master device and a plurality of slave devices. Background technique [0002] In recent years, systems that perform environmental measurement, monitoring, control, and the like using wireless communication have been increasing. In this wireless communication system for performing environmental measurement, monitoring, control, etc., the target area is relatively wide or there are many wireless communication obstacles in the target area in many cases. In such a case, in order to cover the target area, use a wireless communication network that can communicate with other devices by relaying even if direct communication is not possible due to differences in the environment such as the location of the receiver and the transmitter, radio wave conditions, etc. is favorable. [0003] As such a wireless communication network, a multi-hop network (Mesh Network) is proposed, which is...

AI Technical Summary

Problems solved by technology

[0009] However, when the logical address duplication detection method disclosed in the above-mentioned Patent Document 3 is applied to a multi-hop network using the Zigbee protocol, for example, when the power is turned on, each relay station (master device or slave device) establishes communication In the case of routing, excessive communication traffic may be generated, so that the repeater cannot receive messages, and in this case, it is impossible to detect whether the logical address is duplicated

In addition, in any method, if the repeater does not have a mechanism for receiving all messages existing in the network, it is impossible to detect the duplication of logical addresses for all devices existing in the network

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