Patent ID: 6611536
Filing Date: 2003-08-26
Classification: H04J,H04W

Abstract:
A system for integrating data and voice information on a common narrowband RF communications channel for land mobile radio frequency applications, said system comprising:means for dividing said common narrowband RF channel into at least two voice paths, each path divided into a plurality of fixed-length slots each corresponding in size to a detectable inter-syllabic speech gap; means for digitizing speech messages and organizing said messages into variable-length packets; means for digitizing data messages from one or more data sources into fixed-length size packets, a packet corresponding in size to a fixed-length slot; voice activity detector for detecting silence gaps in a digitized speech message, and communicating locations of slots in said voice path corresponding to said detected silent gaps to said data sources; and, means for dynamically multiplexing said variable-length speech packets and fixed-length data packets in slots belonging to a voice path for transmission over said narrowband RF channel, said fixed-length data packets being embedded in said slots at locations corresponding to said detected silent gaps of said speech.