Browse Prior Art Database

Sidechannel Establishment over Mobile Telephony Disclosure Number: IPCOM000230857D
Publication Date: 2013-Sep-16
Document File: 3 page(s) / 57K

Publishing Venue

The Prior Art Database


This publication describes a mechanism for using the broad range of capabilties provided by modern smart phones in order to enhance voice calls with other contextual information. This is achieved by automatically using certain sound cues in the voice stream to establish other side-channel streams (for example a TCP/IP data stream) and associate the session contexts of these channels with the original voice stream. This allows data which can not be represented on an audio channel (such as photographs, user interfaces, data) to be provided as part of a single multi-channel interaction.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 50% of the total text.

Page 01 of 3

Sidechannel Establishment over Mobile Telephony

Described is a mechanism for the establishment of a hybrid session between the voice channel which is part of any telephone call and a number of additional side-channels which are used to enhance the existing phonecall using the facilities of a modern smart phone which can not be easily represented using an audio channel.

    In this context a side channel is a completely parallel stream of communication to the voice channel and could use communication facilities not related directly to mobile telephony. For example establishing a blue-tooth connection between 2 devices is a completely parallel channel to a voice call made using one of the 2 connected devices. The side channel may use completely independent hardware for sending and receiving data within the smart phone handset itself. This is strictly different from a multiplexed channel where a second additional stream is encoded into the voice stream.

    The established channels are contextually linked into a single, multi-channel session so that actions performed using one channel can affect the behaviour of other channels. For example when phoning a telephone banking service a web based side channel could be established which allows the user to login to their account using their internet banking credentials. The authentication on the web based side channel will be reflected on the voice channel and an agent at the bank

will be able to see the user is authenticated and will not need to ask them for

security details.

The novel parts in this mechanism are:

The 2 participants in the interaction are loosely coupled, no prior knowledge is required by either end

The interaction can use any capability of the phone that can be addressed using

a URI (Universal Resource Identifier) format, including potential future capabilities

Interaction across a composite channel, across multiple transports is presented

as a single unified user experience.

Communication can be initiated by either party, the caller or the receiver of a voice call.

    When one side determines that an interaction would benefit from rich data services an audible signal is transmitted on the voice connection. This audio signal encodes a URI from the party initiating the data connection (The Data Initiator) to the second party (The Data Receiver). This URI should contain a unique component identifying any optional context or session information associated with the voice connection and ensuring the unique identification of the Data Receiver.

    Upon receiving the encoded audio signal software in the smart phone device identifies that the signal encodes a link and displays a notification presenting an option for the Data Receiver to follow the URI. At this point in a preferred implementation the user would be informed by a pre-recorded audio message from the Data Initiator that they should look at their phone.

    After accepting the prompt to follow the link the smart phone device uses any av...