Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2005-09-06
2009-06-30
Payne, David C (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C709S232000, C375S259000
Reexamination Certificate
active
07555049
ABSTRACT:
A client premises digital subscriber line (DSL) modem having multi-mode capability is disclosed. In initialization, the modem estimates whether channel conditions are such that digital processing of the received data according to a lower data rate DSL standard, such as ADSL2, may result in a higher effective data rate than receipt and processing according to a higher data rate DSL standard, such as ADSL2+. If so, the DSL modem configures itself, such as by configuring its filter characteristics and sampling frequency, to receive and process data according to the lower data rate DSL standard; the transmitting modem, for example at a central office or service area interface, may continue to operate according to the higher data rate standard (with its bit loading corresponding to a subset of subchannels). The receiving DSL modem processes the payload data according to the lower standard, while processing control messages according to the higher standard.
REFERENCES:
patent: 6043810 (2000-03-01), Kim et al.
patent: 6914981 (2005-07-01), Wada
patent: 2004/0014466 (2004-01-01), Jesse et al.
patent: 2005/0080831 (2005-04-01), Pickerd et al.
patent: 2005/0270171 (2005-12-01), Quintero et al.
patent: 2007/0086477 (2007-04-01), Xiong et al.
Asymmetric digital subscriber line transceivers (ADSL), ITU-T Recommendation G.992.1 (International Telecommunications Union, Jun. 1999).
Asymmetric digital subscriber line transceivers 2 (ADSL2), ITU-T Recommendation G.992.3 (International Telecommunications Union, Jul. 2002).
Asymmetric Digital Subscriber Line (ADSL) transceivers—Extended bandwidth ADSL2 (ADSL2+), Recommendation G.992.5 (International Telecommunications Union, May 2003).
Ali Murtaza
Dasgupta Udayan
Hiremath Channamallesh
Hunt Austin Paul
Iyer Umashankar S.
Brady W. James
Payne David C
Shaw Steven A.
Stevens Brian J
Telecky , Jr. Frederick J.
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