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Wireless communications system

A wireless communication system and wireless channel technology, applied in the field of wireless communication systems, can solve problems such as long time and the time spent on wireless signals become longer

Inactive Publication Date: 2015-07-08
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the transmitter side continues to transmit the same wireless signal again, but if the data length of the transmitted message is long, the time required from missing the preamble to retransmitting becomes very long , as a result, there is a problem that the time it takes to transmit and receive wireless signals becomes longer

Method used

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Experimental program
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Embodiment approach 1

[0036] Below, based on figure 1 and figure 2 Embodiment 1 of the present invention will be described.

[0037] Such as figure 1 As shown, the wireless communication system according to Embodiment 1 includes one receiver 10 and a plurality of transmitters 20 . In addition, in the present embodiment, a total of seven transmitters 20a to 20d and 20x to 22z will be described as the transmitter 20, but the present invention is not limited thereto.

[0038] The transmitters 20a...20d together with the receiver 10 constitute a door phone system. The transmitters 20a...20d are door phone outdoor units that transmit a call signal according to the operation of a visitor, such as a human body detection sensor that is composed of a camera and the like and transmits a human body detection signal, or is installed on a door such as a hallway to transmit a key. The opening and closing signal of the lock, etc. In addition, the transmitters 20x...20z together with the receiver 10 constitu...

Embodiment approach 2

[0053] Below, based on Figure 3 ~ Figure 5 Embodiment 2 of the present invention will be described.

[0054] Such as image 3 As shown, in the wireless communication system according to Embodiment 2, the receiver 10 further includes an operation input unit 14 composed of a liquid crystal panel, switches, and the like. Hereinafter, the description will focus on the parts different from those in Embodiment 1. FIG.

[0055] The receiving unit 12 operates under the control of the control unit 11 , and when a wireless channel to be scanned is specified, the receiving unit 12 measures the signal strength of the wireless channel by the signal strength detecting unit 12 a based on RSSI, for example. When the measured signal strength is higher than the predetermined threshold, the wireless signal flowing in the wireless channel is received and output to the control unit 11, but when the signal strength is lower than the predetermined threshold, the wireless signal is not detected. ...

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PUM

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Abstract

Disclosed is a wireless communication system provided with: transmitters which alternatively select a plurality of wireless channels having different frequencies to each other and transmit wireless signals; and a receiver which receives the wireless signals transmitted by the transmitters. The receiver is provided with: a signal strength detection unit which individually measures the signal strength of the wireless channels to be scanned which are sequentially switched in each predetermined scan cycle; a storage unit which stores the signal strength of each wireless channel as measured by the signal strength detection unit; and a signal reception unit which prioritises a wireless channel from among the wireless channels to be scanned, said wireless channel having a high signal strength stored in the storage unit, and receives the wireless signal.

Description

[0001] (This application is a divisional application of a PCT application (international application number PCT / IB2011 / 000096) with a filing date of January 25, 2011, a national application number of 201180016470.1, and an invention title of "Wireless Communication System".) technical field [0002] The present invention relates to a wireless communication system using a plurality of wireless channels for wireless communication. Background technique [0003] In recent years, wireless communication systems that transmit and receive control signals for activating, changing, or terminating functions of devices installed at remote locations, using, for example, wireless base stations such as specific low-power wireless base stations, have become widespread. , or the transmission and reception of measurement results from a measuring machine installed at a remote location. This wireless communication system is applicable to various systems such as lighting control systems, securit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/16
CPCH04W48/16
Inventor 新居隆之武长秀树小伊势祥二
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD