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Multi-layered wireless communication system

A wireless communication system, multi-layer technology, applied in wireless communication, radio transmission system, multiplex communication, etc., can solve the problems of receiving power supply and not being able to expect commercial power directly, and achieve the effect of suppressing power consumption

Inactive Publication Date: 2013-11-06
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it cannot be expected to receive power directly from a commercial power supply at an actual installation site.

Method used

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  • Multi-layered wireless communication system
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  • Multi-layered wireless communication system

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Next, preferred embodiments of the present invention will be described with reference to the drawings.

[0025] (Structure of Wireless Communication System)

[0026] figure 1 It is a schematic diagram showing the overall configuration of the multi-layer wireless communication system according to the embodiment of the present invention. like figure 1 As shown, the wireless communication system 100 includes a base unit 10 , a relay unit 20 , and a slave unit 30 constituting a wireless terminal, and constructs communication paths in which the base unit 10 and the slave units 30 are the highest and lowest levels, respectively. Moreover, when the distance between the main machine 10 and the child machine 30 is long, or when a good communication environment cannot be established between the two terminals due to obstacles between the main machine 10 and the child machine 30, etc., the The relay devices 20 are installed so that an appropriate number of relay devices 20 are...

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Abstract

In the present invention, an intermediary apparatus (20) is configured so as to: take into consideration an amount of time required for reception preparation (TPa), an amount of time for receiving a synchronization header (TPb), and an environmental error amount of time (TPy); calculate a predicted amount of time (TPg) which is an amount of time, retroactively from a fixed point, until a point when reception preparation is started; start the reception preparation at a time (t1) which is traced back by the predicted amount of time from a predicted reception time (t2) of the fixed point, and acquire a measured amount of time (TPm) which is the amount of time from the reception preparation start time to the actual reception time (t3) of the fixed point; and on the basis of a history of errors (∆TP) which are differences between predicted amounts of time and measured amounts of time, correct an internal clock of the intermediary apparatus (20) so as to transmit a beacon signal after correction of the internal clock to a lower machine. The lower machine, on the basis of the beacon signal which has been transmitted after correction of the internal clock by the intermediary apparatus (20), corrects the internal clock of the machine itself.

Description

technical field [0001] The present invention relates to a multi-layered wireless communication system composed of wireless terminals of a main unit, a repeater unit, and a slave unit, and the repeater unit constituting the wireless communication system, and in particular to a system capable of making all these wireless terminals Structures that are synchronized in time. Background technique [0002] There is a wireless communication system that enables wireless communication between one wireless terminal and the other wireless terminal via one or more repeaters. For example, Patent Document 1 discloses a fire alarm system as an application example of such a system. In addition, as another application example of such a wireless communication system, there is a meter reading system that automatically performs meter reading of gas consumption in a home. In this system, the sub-machines equipped on the gas meters of each family detect the gas flow value, and collect the detect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04W84/18
CPCH04W84/18H04W56/0035H04B7/155H04J3/0685H04W56/0015
Inventor 山本雅弘堀池良雄田中崇夫
Owner PANASONIC CORP