WIRELESS DISASTER-PREVENTION NODE AND WIRELESS DISASTER-PREVENTION SYSTEM
First Claim
1. A wireless disaster-prevention node comprising:
- a channel setting unit capable of setting an operating frequency channel from among a plurality of frequency channels;
a wireless communication unit receiving a wireless signal in accordance with a predetermined telegram message format output from a sensor node using a frequency channel same as the operating frequency channel set by using the channel setting unit, demodulating the wireless signal, and measuring radio-field intensity;
a communication control unit executing a process based on the telegram message when a transmission source ID obtained from the telegram message demodulated by the wireless communication unit matches a registered ID determined and registered in advance;
a first usage-rate measuring unit measuring a usage rate of the operating frequency channel; and
a second usage-rate measuring unit measuring a usage rate of the unused frequency channel.
1 Assignment
0 Petitions
Accused Products
Abstract
To determine the busy degree of the operating frequency channel caused by other systems and enable a user to know an unused frequency channel having a low communication frequency. A first usage-rate measuring unit 40 measures the usage rate of an operating frequency channel, and a second usage-rate measuring unit 42 measures the usage rates of unused frequency channels. When the usage rate measured by the first usage-rate measuring unit 40 exceeds a predetermined value to generate a busy state, a first usage-rate determining unit 44 displays the unused frequency channel having the low frequency rate, which is determined by the second usage-rate determining unit 45, to recommend the unused frequency channel as a switching destination.
-
Citations
27 Claims
-
1. A wireless disaster-prevention node comprising:
-
a channel setting unit capable of setting an operating frequency channel from among a plurality of frequency channels; a wireless communication unit receiving a wireless signal in accordance with a predetermined telegram message format output from a sensor node using a frequency channel same as the operating frequency channel set by using the channel setting unit, demodulating the wireless signal, and measuring radio-field intensity; a communication control unit executing a process based on the telegram message when a transmission source ID obtained from the telegram message demodulated by the wireless communication unit matches a registered ID determined and registered in advance; a first usage-rate measuring unit measuring a usage rate of the operating frequency channel; and a second usage-rate measuring unit measuring a usage rate of the unused frequency channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A wireless disaster-prevention system receiving and processing, by a wireless disaster-prevention node, a wireless signal transmitted from a sensor node and transmitting a result of the processing to a receiver connected by a signal line, wherein
the wireless-disaster prevention node comprising: -
a channel setting unit capable of setting an operating frequency channel from among a plurality of frequency channels; a wireless communication unit receiving a wireless signal in accordance with a predetermined telegram message format output from a sensor node using a frequency channel same as the operating frequency channel set by using the channel setting unit, demodulating the wireless signal, and measuring radio-field intensity; a communication control unit executing a process based on an telegram message when a transmission source ID obtained from the telegram message demodulated by the wireless communication unit matches a registered ID determined and registered in advance; a first usage-rate measuring unit measuring a usage rate of the operating frequency channel; and a second usage-rate measuring unit measuring a usage rate of the unused frequency channel. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
-
Specification