Title:
TIME DIVISION MULTIPLEX TRANSMISSION SYSTEM, AND COMMUNICATION SYSTEM USING TIME DIVISION MULTIPLEX TRANSMISSION ACCESS METHOD
Document Type and Number:
WIPO Patent Application WO/2000/003514
Kind Code:
A1
Abstract:
Four channel signals (3a to 3d) are inputted into a transmitter (1). The channel signal (3a) is an ATM cell base flow and inputted into a channel identifier adding circuit (4). The HEC byte of PLOAM of the signal is inverted to generate a reference channel signal (3x). The reference channel signal (3x) is inputted into a multiplexing circuit (5) together with the channel signals (3b to 3d). The signals are subjected to time division bit multiplexing to generate a time division multiplex transmission signal (6), which is sent to a channel identifying circuit (8) of a receiver (7) and separated to signals for respective channels. The channel identifying circuit (8) detects the reference channel signal (3x) from the four channel signals based on the inversion of the HEC byte of the PLOAM cell and identifies all the channel signals based on the phase differences from that of the reference channel signal (3x). The identified channel signals are outputted from the channel identifying circuit (8).
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Inventors:
ISHIKAWA HAJIME (JP)
Application Number:
PCT/JP1999/003662
Publication Date:
January 20, 2000
Filing Date:
July 07, 1999
Export Citation:
Assignee:
NEC CORP (JP)
ISHIKAWA HAJIME (JP)
ISHIKAWA HAJIME (JP)
International Classes:
H04L12/54; H04Q11/00; H04Q11/04; H04L12/70; (IPC1-7): H04L12/28; H04L12/56
Foreign References:
| JPH0774722A | 1995-03-17 | |||
| JPH09172422A | 1997-06-30 | |||
| JPH08331092A | 1996-12-13 |
Other References:
ISHIKURA A., MEADA Y., NAGASAKO Y.: "ALIGNMENT METHOD OF THE UPSTREAM SIGNAL PHASE IN A CELL BASED PASSIVE DOUBLE STAR ATM TRANSMISSION SYSTEM.", DENSHI JOUHOU TSUUSHIN GAKKAI TSUUSHIN, XX, XX, vol. 03., no. B-477., 15 August 1991 (1991-08-15), XX, pages 03 - 196., XP002921890
MAEDA Y., OKADA K.: "INTERNATIONAL STANDARDIZATION TREND ON ATM-PON ACCESS SYSTEM.", IEICE TECHNICAL REPORT, DENSHI JOUHOU TSUUSHIN GAKKAI, JP, 25 June 1998 (1998-06-25), JP, pages 37 - 54., XP002921891, ISSN: 0913-5685
MAEDA Y., OKADA K.: "INTERNATIONAL STANDARDIZATION TREND ON ATM-PON ACCESS SYSTEM.", IEICE TECHNICAL REPORT, DENSHI JOUHOU TSUUSHIN GAKKAI, JP, 25 June 1998 (1998-06-25), JP, pages 37 - 54., XP002921891, ISSN: 0913-5685
Attorney, Agent or Firm:
Amano, Hiroshi (6-4 Shiba 4-chome Minato-ku, Tokyo, JP)
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