An online concierge system for establishing a communication session between devices using a light signal. A first client device captures video data depicting a light emitter of another client device. The first client device detects a light signal transmitted by the light emitter in the video data. The first client device extracts a handshake identifier from the light signal by decoding the light signal. A machine learning model may be used to translate the light signal into a numerical or an alphanumerical identifier. The first client device established a communication session with the other client device by transmitting a request to establish the communication session via an online concierge system. The request contains the extracted handshake identifier.

An online concierge system for establishing a communication session between devices using a light signal. A first client device captures video data depicting a light emitter of another client device. The first client device detects a light signal transmitted by the light emitter in the video data. The first client device extracts a handshake identifier from the light signal by decoding the light signal. A machine learning model may be used to translate the light signal into a numerical or an alphanumerical identifier. The first client device established a communication session with the other client device by transmitting a request to establish the communication session via an online concierge system. The request contains the extracted handshake identifier.

A system and method for communicating personal information of a first user with a second user, without the need for the first user and second user to interact verbally or in any other manner. The first user stores personal information on a server, for example a web server, which is addressable using a URL or other addressing function. The first user causes the network address information to be transmitted in an electromagnetic signal, whereupon it is received by a second user's receiving device and a client of the second user is directed to a network location storing the first user's personal information. The first user's personal information is then displayed to the second user. The system and method of the invention are useful for social networking and other purposes. The transmitted signal may be encoded in Morse code, where differing colors of light represent code elements.

A system and method for communicating personal information of a first user with a second user, without the need for the first user and second user to interact verbally or in any other manner. The first user stores personal information on a server, for example a web server, which is addressable using a URL or other addressing function. The first user causes the network address information to be transmitted in an electromagnetic signal, whereupon it is received by a second user's receiving device and a client of the second user is directed to a network location storing the first user's personal information. The first user's personal information is then displayed to the second user. The system and method of the invention are useful for social networking and other purposes. The transmitted signal may be encoded in Morse code, where differing colors of light represent code elements.

A message processing method for a portable electronic device includes the steps of: detecting, by a motion sensor, a plurality of first knocks of an object on the portable electronic device and generating a plurality of first detecting signals according to the plurality of first knocks; and encoding, by an encoding system, the plurality of first detecting signals to generate a first message code, wherein a first message is decodable from the first message code by a decoding system.

Aspects of the present invention relate to methods, systems, and computer-readable media for triggering an identification signal broadcast of a first navigational aid equipment using a tone in the voice band transmitted by a second navigational aid equipment. Aspects include receiving, at the first navigational aid equipment, a tone in a voice band of second navigational aid equipment. Aspects also include transmitting, by the first navigational aid equipment, the identification associated with the first navigational aid equipment identification when the tone is received.

Aspects of the present invention relate to methods, systems, and computer-readable media for triggering an identification signal broadcast of a first navigational aid equipment using a tone in the voice band transmitted by a second navigational aid equipment. Aspects include receiving, at the first navigational aid equipment, a tone in a voice band of second navigational aid equipment. Aspects also include transmitting, by the first navigational aid equipment, the identification associated with the first navigational aid equipment identification when the tone is received.

A sender telephone receives a text message to send to a receiver telephone. The sender telephone determines the transmission delay time by sending a predetermined message to receiver telephone, based on the time it receives an address complete message and a release message. The sender telephone determines a constant value that is greater than the transmission delay time and in response to the determining the constant value, ringing the receiver telephone to transmit the received inputted text message. A receiver telephone receives a predetermined message from a caller telephone to determine a transmission delay time, based on the time it receives the address complete message and a release message. The receiver telephone determines a constant value that is greater than the transmission delay time. The receiver telephone receives incoming rings from the caller telephone and converts the received rings into a text message to be displayed.

A sender telephone receives a text message to send to a receiver telephone. The sender telephone determines the transmission delay time by sending a predetermined message to receiver telephone, based on the time it receives an address complete message and a release message. The sender telephone determines a constant value that is greater than the transmission delay time and in response to the determining the constant value, ringing the receiver telephone to transmit the received inputted text message. A receiver telephone receives a predetermined message from a caller telephone to determine a transmission delay time, based on the time it receives the address complete message and a release message. The receiver telephone determines a constant value that is greater than the transmission delay time. The receiver telephone receives incoming rings from the caller telephone and converts the received rings into a text message to be displayed.

A sender telephone receives a text message to send to a receiver telephone. The sender telephone determines the transmission delay time by sending a predetermined message to receiver telephone, based on the time it receives an address complete message and a release message. The sender telephone determines a constant value that is greater than the transmission delay time and in response to the determining the constant value, ringing the receiver telephone to transmit the received inputted text message. A receiver telephone receives a predetermined message from a caller telephone to determine a transmission delay time, based on the time it receives the address complete message and a release message. The receiver telephone determines a constant value that is greater than the transmission delay time. The receiver telephone receives incoming rings from the caller telephone and converts the received rings into a text message to be displayed.