Title:
ALTERNATING SPEECH AND DATA TRANSMISSION IN DIGITAL COMMUNICATIONS SYSTEMS
Document Type and Number:
WIPO Patent Application WO1999056456
Kind Code:
A3
Abstract:
Alternate speech (56, 57) and data (52, 53) communication over a single circuit is implemented within a communication network which includes first nodes (61) which include both a data source (62) and a speech source (63). Digital information, comprising either speech parameters or data, is sent in discrete blocks (51-57) between the first node (61) and a second node (73) connected to the network. An inband signaling bit pattern (51, 55) is included within selected blocks sent by a TX-alternator (64, 79) in the sending node (61, 73) to indicate whether all following digital information is to be interpreted by the receiving node as speech or data and a RX-alternator (74, 84) in the receiving node (61, 73) interprets the digital information in accordance with the last received inband signaling pattern (51, 55). One exemplary implementation is in a GSM cellular radio network in tandem free operation.
Inventors:
ANDERS DANNE
KARL HELLWIG
KARL HELLWIG
Application Number:
PCT/SE1999/000634
Publication Date:
June 02, 2000
Filing Date:
April 20, 1999
Export Citation:
Assignee:
ERICSSON TELEFON AB L M (SE)
International Classes:
G10L15/00; G10L19/00; H04L12/56; H04L29/02; H04M11/06; H04Q11/04; H04W48/08; H04W88/18; (IPC1-7): H04L12/56
Domestic Patent References:
| WO1994026056A1 | 1994-11-10 | |||
| WO1995026603A1 | 1995-10-05 |
Foreign References:
| US5533019A | 1996-07-02 | |||
| US5502723A | 1996-03-26 | |||
| US5361255A | 1994-11-01 | |||
| EP0243563A1 | 1987-11-04 | |||
| EP0713343A2 | 1996-05-22 |
Other References:
JERRY SKENE: "UFO? No, TFO!", COHERENT COMMUNICATIONS - ARTICLE, January 1998 (1998-01-01), http://www.coherent.com/articles/tfo.htm, pages 1 - 2, XP002085966
Download PDF:
Previous Patent: FLICKER COMPENSATION FOR CAMERAS
Next Patent: PORTABLE DATA TRANSMISSION SYSTEM FOR GLOBAL AND LOCAL COMPUTER NETWORKS
Next Patent: PORTABLE DATA TRANSMISSION SYSTEM FOR GLOBAL AND LOCAL COMPUTER NETWORKS