http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H10507051-A
Outgoing Links
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| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L27-00 |
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| filingDate | 1996-02-06^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1998-07-07^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H10507051-A |
| titleOfInvention | Multipoint-to-point communication system |
| abstract | Summary This communication system includes a hybrid fiber / coaxial distribution network. The headend provides for downstream (downstream) transmission of telephone and control data at a first frequency bandwidth on the hybrid fiber / coaxial distribution network and a second frequency on the hybrid fiber / coaxial distribution network. Prepare for reception of upstream telephone and control data in bandwidth. The headend modulates at least downstream (downstream) telephone information on a plurality of orthogonal carriers in a bandwidth of a first frequency, and further modulates at least a plurality of orthogonal carriers on a plurality of orthogonal carriers in a bandwidth of a second frequency. Includes a head-end multi-carrier modem for demodulating upstream telephone information. The head end further comprises a controller operatively connected to the head end multi-carrier modem for controlling transmission of downstream telephone information and downstream control data and controlling reception of upstream control data and upstream telephone information. including. The system further includes a hybrid fiber / coaxial distribution network for transmitting telephone and control data upstream in the second frequency bandwidth and receiving downstream control data and telephone data in the first frequency bandwidth, respectively. Service unit (s) effectively connected to the service unit. Each service unit modulates at least upstream telephone information on at least one carrier orthogonal to the other carrier at the head-end terminal in the second frequency bandwidth, and further modulates a plurality of orthogonal telecommunications signals in the first frequency bandwidth. A single service unit multi-carrier modem is included for demodulating at least downstream telephone information modulated on at least one band of the carrier. Each service unit also includes a controller operatively connected to the service unit multicarrier modem to control the modulation and demodulation performed by the service unit multicarrier modem. A method for monitoring a communication channel, a distribution loop method for adjusting transmission characteristics to enable data transmission in a multipoint-to-point communication system, a polyphase filter technique for providing ingress protection, and A method for identifying a frequency band used for transmission by a service unit is also included. |
| priorityDate | 1995-02-06^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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