Title:
MULTI-POINT TO POINT COMMUNICATION SYSTEM MULTI-POINT TO POINT COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO1996024989
Kind Code:
A3
Abstract:
The communication system includes a hybrid fiber/coax distribution network. A head end provides for downstream transmission of telephony and control data in a first frequency bandwidth over the hybrid fiber/coax distribution network and reception of upstream telephony and control data in a second frequency bandwidth over the hybrid fiber/coax distribution network. The head end includes a head end multicarrier modem for modulating at least downstream telephony information on a plurality of orthogonal carriers in the first frequency bandwidth and demodulating at least upstream telephony information modulated on a plurality of orthogonal carriers in the second frequency bandwidth. The head end further includes a controller operatively connected to the head end multicarrier modem for controlling transmission of the downstream telephony information and downstream control data and for controlling receipt of the upstream control data and upstream telephony information. The system further includes service units, each service unit operatively connected to the hybrid fiber/coax distribution network for upstream transmission of telephony and control data in the second frequency bandwidth and for receipt of the downstream control data and telephony in the first frequency bandwidth. Each service unit includes a service unit multicarrier modem for modulating at least the upstream telephony information on at least one carrier orthogonal at the head end terminal to another carrier in the second frequency bandwidth and for demodulating at least downstream telephony information modulated on at least a band of a plurality of orthogonal carriers in the first frequency bandwidth. Each service unit also includes a controller operatively connected to the service unit multicarrier modem for controlling the modulation of and demodulation performed by the service unit multicarrier modem. A method of monitoring communication channels, a distributed loop method for adjusting transmission characteristics to allow for transmission of data in a multi-point to point communication system, a polyphase filter technique for providing ingress protection and a scanning method for identifying frequency bands to be used for transmission by service units are also included.
More Like This:
Inventors:
DAPPER MARK J
GEILE MICHAEL J
HILL TERRANCE J
ROBERTS HAROLD A
ANDERSON BRIAN D
BREDE JEFFREY
WADMAN MARK S
KIRSCHT ROBERT J
HERRMANN JAMES J
FORT MICHAEL J
BUSKA STEVEN P
GEILE MICHAEL J
HILL TERRANCE J
ROBERTS HAROLD A
ANDERSON BRIAN D
BREDE JEFFREY
WADMAN MARK S
KIRSCHT ROBERT J
HERRMANN JAMES J
FORT MICHAEL J
BUSKA STEVEN P
Application Number:
PCT/US1996/001575
Publication Date:
November 21, 1996
Filing Date:
February 06, 1996
Export Citation:
Assignee:
ADC TELECOMMUNICATIONS INC (US)
International Classes:
H04B10/272; H04J3/14; H04J11/00; H04J14/02; H04L1/00; H04L1/24; H04L5/02; H04L5/06; H04L25/03; H04L27/26; H04M3/00; H04N7/173; H04L27/00; (IPC1-7): H04B10/207; H04L5/06; H04J14/00
Domestic Patent References:
| WO1993000751A1 | 1993-01-07 | |||
| WO1995013579A1 | 1995-05-18 |
Foreign References:
| EP0499065A2 | 1992-08-19 | |||
| EP0613266A2 | 1994-08-31 | |||
| US5303229A | 1994-04-12 | |||
| EP0695054A2 | 1996-01-31 | |||
| EP0599515A1 | 1994-06-01 | |||
| US5216697A | 1993-06-01 | |||
| US4381546A | 1983-04-26 | |||
| US5214687A | 1993-05-25 | |||
| EP0399611A2 | 1990-11-28 | |||
| US4291403A | 1981-09-22 | |||
| GB2266433A | 1993-10-27 | |||
| EP0131662A1 | 1985-01-23 | |||
| US5121409A | 1992-06-09 | |||
| US5195092A | 1993-03-16 | |||
| EP0618692A1 | 1994-10-05 |
Other References:
BINGHAM: "Multicarrier modulation for data transmission: An idea whose time has come", IEEE COMMUNICATIONS MAGAZINE, vol. 28, no. 5, May 1990 (1990-05-01), US, pages 5 - 14, XP000132491
WINTERMANTEL ET AL: "A class of DFT polyphase filter banks for orthogonal multiple carrier data transmission", IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, vol. 3, 10 May 1992 (1992-05-10) - 13 May 1992 (1992-05-13), SAN DIEGO, US, pages 1332 - 1335, XP000338195
SIERENS ET AL: "Subcarrier multiple access for passive optical networks and comparison to other multiple access techniques", IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, vol. 1, 2 December 1991 (1991-12-02) - 5 December 1991 (1991-12-05), PHOENIX, US, pages 619 - 623, XP000326039
FLIEGE: "Othogonal multiple carrier data transmission", EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS AND RELATED TECHNOLOGIES, vol. 3, no. 3, May 1992 (1992-05-01) - June 1992 (1992-06-01), MILANO, IT, pages 255 - 264, XP000304924
ENGSTRÖM ET AL: "A system for test of multiaccess methods based on OFDM", IEEE VEHICULAR TECHNOLOGY CONFERENCE, vol. 3, 8 June 1994 (1994-06-08) - 10 June 1994 (1994-06-10), STOCKHOLM, SE, pages 1843 - 1845, XP000497744
PATENT ABSTRACTS OF JAPAN vol. 16, no. 447 (E - 1266) 17 September 1992 (1992-09-17)
WINTERMANTEL ET AL: "A class of DFT polyphase filter banks for orthogonal multiple carrier data transmission", IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, vol. 3, 10 May 1992 (1992-05-10) - 13 May 1992 (1992-05-13), SAN DIEGO, US, pages 1332 - 1335, XP000338195
SIERENS ET AL: "Subcarrier multiple access for passive optical networks and comparison to other multiple access techniques", IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, vol. 1, 2 December 1991 (1991-12-02) - 5 December 1991 (1991-12-05), PHOENIX, US, pages 619 - 623, XP000326039
FLIEGE: "Othogonal multiple carrier data transmission", EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS AND RELATED TECHNOLOGIES, vol. 3, no. 3, May 1992 (1992-05-01) - June 1992 (1992-06-01), MILANO, IT, pages 255 - 264, XP000304924
ENGSTRÖM ET AL: "A system for test of multiaccess methods based on OFDM", IEEE VEHICULAR TECHNOLOGY CONFERENCE, vol. 3, 8 June 1994 (1994-06-08) - 10 June 1994 (1994-06-10), STOCKHOLM, SE, pages 1843 - 1845, XP000497744
PATENT ABSTRACTS OF JAPAN vol. 16, no. 447 (E - 1266) 17 September 1992 (1992-09-17)
Download PDF: