Qualcomm Incorporated

M/a-com Government Systems, Inc.

Steven L Rogers

Matthew Stuart Grob

Eric John Lekven

Byron Yoshio Yafuso

Franklin Peter Antonio

Steven H Gardner

Daniel Ray Kindred

William A Shumate

Krishnanand Kelkar

Thomas R Bilotta

A private communication network through which a plurality of member users communicate using the public switched telephone network (PSTN) is disclosed herein. Each member user utilizes either a modified land line telephone directly connected to PSTN, or uses a modified mobile telephone operatively coupled to the PSTN through a wireless communication system. The private communication network includes network call manager having a telephone network interface for establishing a telephone connection with each of a plurality of telephone lines of the PSTN. Each of the plurality of telephone lines is associated with one of the plurality of member users. The network call manager further includes a switch matrix, coupled to the telephone network interface, for providing an information signal received from an active member user over a selected telephone line to the remaining non-active member users. A network call manager controller identifies the active member user the basis of push-to-talk (PTT) request signals received from the member users'telephones over the plurality of telephone lines. The telephone set of each member user will typically be capable of both standard telephone operation as well as of PTT operation over the private communication network. The security of the PTT private network may be enhanced by configuring each telephone set for encryption of all such reverse link transmissions, as well as for corresponding decryption of the forward link information from the active member user.

Method and apparatus for providing a private communication system in a public switched telephone network

Method and apparatus for providing a private communication system in a

A decoding system capable of outputting Viterbi-decoding-algorithm-decoded data at a predetermined rate that is greater than a given rate at which coded data is processed in accordance with said algorithm to produce the decoded data. The system includes a data input bus; a data output bus; a ring of decoders, with each decoder being coupled to the input bus for receiving coded data from the input bus and coupled to the output bus for providing decoded data onto the output bus. Each of the decoders in the ring includes an input buffer, timing controller, decoding processor and output buffer. The input buffer responds to a start-input signal from a preceding decoder in the ring by buffering a block of the received coded data. The timing contoller provides a start-input signal to a succeeding decoder in the ring at such time as to cause the succeeding decoder to receive a block of coded data from the input bus that overlaps the block of coded data received from the input bus by the instant said decoder. The decoding processor processes the buffered block of coded data at a given rate to produce decoded data. The output buffer buffers the block of decoded data. The timing controller also responds to a start-up signal provided by a preceding decoder in the ring by causing the buffered decoded data to be provided onto the data output bus at a predetermined rate that is greater than the given rate at which the coded data is processed to produce the decoded data; and further provides a start-output signal to the succeeding decoder in the ring to cause the succeeding decoder to provide a portion of the buffered decoded data therein onto the data output bus at a predetermined rate and at such time as to be continuous from and not overlap the portion of the buffered decoded provided onto the output data bus from the instant said decoder.

Decoder ring system

Growing community of inventors

San Diego, CA, United States of America

Steven L Rogers