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Ad-Hoc Silent Network Alert System Disclosure Number: IPCOM000018726D
Original Publication Date: 2003-Aug-04
Included in the Prior Art Database: 2003-Aug-04
Document File: 2 page(s) / 56K

Publishing Venue



Disclosed is a system to enhance alert systems for hard-of-hearing and deaf individuals. Ad-hoc wireless networking is utilized to create a two-way wireless system. The two-way mode allows feedback communication for more accurate alerts and better monitoring without the use of a completely wired system.

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Ad-Hoc Silent Network Alert System

Hearing impaired individuals and families are not able to detect easily whether their doorbell, fire alarm or telephone is signaling for their attention. The same applies for car alarms at home and babies crying. This is especially true when the individuals are sleeping. The known wireless solutions to these problems is to utilize a one-way wireless transmitter / receiver to set off vibrating pagers or flashing lights. The receiver can also detect noises and try to identify whether the noise is a fire alarm and then sets off a signaler. The main drawback is that these systems are very simple and do not work well. False alarms are frequent as a result of the receiver incorrectly identifying the source of a noise. The wireless systems are limited to a small range, sometimes about 100 feet. In the case of a doorbell alerter, if the transmitter is out of range the hearing impaired would not be aware that someone is at the door. Another drawback is because these systems have only one receiver, there is no feedback to the transmitter to acknowledge that the alarm is received. Additional solution is required to distinguish better the nature of alerts, and to make sure that the system receives all alerts.

The solution disclosed is a two way system which uses 802.11b ad-hoc wireless networking to coordinate all the different alerts and notify users. Each alerter (doorbell, fire alarm, telephone) would be a wireless host with the ability to transmit and receive. Thus each alerter will be able to execute two-way communications. Alerters can send signals for a period of time or until acknowledgement is received. The destination is a central base station which will acknowledge alerts received, process alerts and record them. The alerter can...