Patent ID: 9237172
Filing Date: 2016-01-12
CPC Classification: H04L,H04W

Claim Text:
1. A method of exchanging control signals between a first station in communication with a second station through an infrastructure, comprising: determining that the first station is equipped to use in-band signaling to exchange control signals with the second station during a voice call, wherein determining that the first station is equipped to use in-band signaling to exchange control signals with the second station comprises determining at the first station that the second station is equipped to use in-band signaling to exchange control signals with the first station by applying a watermark to voice packets, wherein the watermark is interpreted as an in-band signal by the second station if the second station is equipped to use in-band signaling, wherein the first station is a mobile station; exchanging control signals between the first station and the second station using an in-band channel, wherein the control signals comprise control information and data, and wherein the data comprises data from at least one sensor of the first station or the second station; and exchanging device information between the first station and the second station using the control signals through the in-band channel, wherein the device information is not visible to the infrastructure.