Browse Prior Art Database

Information transmission throught call duration signals

IP.com Disclosure Number: IPCOM000131172D
Original Publication Date: 2005-Nov-09
Included in the Prior Art Database: 2005-Nov-09
Document File: 3 page(s) / 109K

Publishing Venue

IBM

Abstract

Whenever you make ring a phone you cannot transmit any kind of information if receiver doesn't answer the call. Moreover mobile phone short message often contains short information such as ?ok', 'no' or ?call me back' and so on. The user must pay the provider for the cost of message despite of triviality of content. This article deal with a simple and effective way to send information from a cell-phone to another cell-phone using the ring tone duration or the number of consecutive ring signals. This is done to avoid sending an expensive text-message to send a simple, short and repetitive message.

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Information transmission throught call duration signals

An automatic system can be realized to transmit information by means of ring signal duration. Two java applications can be deployed into the cell phones that want to communicate simple messages.

     A Dictionary that maps ring durations to a text messages must be installed to both phones and linked to the Contact (user) that resides into the phone address book. This way both phones are able to send a ring signal with certain duration. The duration and the delay between phone and physical transmitter, cell-phone network cannot be assured without the service provider collaboration. As we will see, that could be critical to assure the expected ring signal duration and to minimize the delay between phones (solution A). Of course the Service provider could minimize this latency (or avoid increasing it) asking for a special prefix (#xx...*number-to-call) and billing significantly less than a SMS for that message.

     On the other hand, if the Service provider cannot be leveraged (solution B) it could be put in place a mechanism to reduce errors due to latency and/or increase the time gap between transmitted symbols.

3. System description:

     This system allows two cell-phones users to send pre-defined messages over the network to each other.

     Two solutions are possible, Solution A (with service provider collaboration); Solution B: (without service provider collaboration).

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3.1 Configuration

     In both solutions, users must install and configure the system to be able to communicate...