Method and apparatus for networked modems
View Patent ↗Networked modems configurable to establish a communication system on a wired communication medium. Each modem includes: a network module, transmit and receive path modules and a frequency domain echo canceller. The network module is configured to communicate with network modules of remaining ones of the at least three modems to allocate bandwidth of the shared communications medium for at least two discrete point-to-point communication links between corresponding pairs of the at least three modems. The transmit and receive path modules are configured for multi-tone modulation and demodulation of communications on the wired communication medium and are responsive to the bandwidth allocation of the network module to concurrently process at least a first discrete point-to-point communication link with a first modem among remaining ones of the at least three modems and at least a second discrete point-to-point communication link with a second among remaining ones of the at least three modems. The frequency domain echo canceller is configured to substantially cancel leakage of the communications transmitted on the transmit path into the receive path and to enable each point-to-point communication link to support full duplex communications.
1. A communication system to establish a network among peripheral devices on a shared wired communication medium, the communication system comprising:
at least three multi-tone modulated moderns each configured to couple an associated peripheral device to the shared wired communication medium; and
respective discrete and exclusive point-to-point communication links between pairs of the at least three multi-tone modulated modems using the shared wired communication medium,
wherein each of the at least three multi-tone modulated moderns includes:
shared and discrete components coupled to one another to form a transmit path and a receive path configured for multi-tone modulation and demodulation of communications on the shared wired communication medium, including:
a network module configured to communicate over the shared wired communication medium with network modules of remaining ones of the at least three multi-tone modulated modems to allocate respective dedicated frequency ranges each comprising one or more tones on the shared wired communications medium for establishing each of the discrete and exclusive point-to-point communication links between corresponding pairs of the at least three multi-tone modulated modems by which each multi-tone modulated modem and associated peripheral device communicates directly and simultaneously with each remaining one of the at least three multi-tone modulated modems on the shared wired communication medium.
2. The communication system of claim 1 , wherein the shared and discrete components of each of the at least three multi-tone modulated modems further comprises:
an echo canceller configured to substantially cancel leakage of the communications transmitted on the transmit path into the receive path and to enable each point-to-point communication link to support full duplex communications, thereby substantially increasing available bandwidth on the shared wired communication medium.
3. The communication system of claim 1 , wherein the network module further comprises:
an allocator which dynamically allocates bandwidth to each point-to-point communication link using at least one of frequency division multiple access (FDMA) and time division multiple access (TDMA).
4. The communication system of claim 3 , wherein the dynamic allocation of bandwidth is performed such that each point-to-point communication link has a corresponding amount of bandwidth, with at least two of the discrete and exclusive point-to-point communication links having different amounts of bandwidth from each other.
5. The communication system of claim 1 , wherein the shared wired communication medium comprises at least one of: a twisted pair phone line, a co-axial cable, an optical cable, an alternating current power line.
6. The communication system of claim 1 , wherein the network module of each of the at least three multi-tone modulated modems further comprises:
sub-modules configured to assume one of master or slave mode depending on a status of the network and in the slave mode to determine bandwidth requirements for the discrete and exclusive point-to-point communication links supported by the corresponding one of the at least three modems and in the master mode to allocate bandwidth among the discrete and exclusive point-to-point communication links supported by the at least three multi-tone modulated modems on the shared wired communications medium using at least one of frequency division multiple access (FDMA) and time division multiple access (TDMA).
7. A modem configured to couple an associated peripheral device to a shared wired communications medium shared with at least two other modems, and the modem comprising:
shared and discrete components coupled to one another to form a transmit path and a receive path configured for multi-tone modulation and demodulation of communications on the shared wired communication medium, including:
a network module configured to communicate over the shared wired communication medium with network modules of the at least two other modems to allocate respective dedicated frequency ranges each comprising one or more tones on the shared wired communications medium for establishing separate and exclusive discrete point-to-point communication links between corresponding pairs of the at least two other modems by which the modem and associated peripheral device communicates directly and simultaneously with each remaining one of the at least two other modems on the shared wired communication medium.
8. The modem of claim 7 , wherein the shared and discrete components further comprise:
an echo canceller configured to substantially cancel leakage of the communications transmitted on the transmit path into the receive path and to enable each point-to-point communication link to support full duplex communications, thereby substantially increasing available bandwidth on the shared wired communication medium.
9. The modem of claim 7 , wherein the network module further comprises:
an allocator which dynamically allocates bandwidth to each point-to-point communication link using at least one of frequency division multiple access (TDMA) and time division multiple access (TDMA).
10. The modern of claim 9 , wherein the dynamic allocation of bandwidth is performed such that each point-to-point communication link has a corresponding amount of bandwidth, with at least two of the discrete and exclusive point-to-point communication links having different amounts of bandwidth from each other.
11. The modern of claim 7 , wherein the shared wired communication medium comprises at least one of: a twisted pair phone line, a coaxial cable, an optical cable, an alternating current power line.
12. The modern of claim 7 , wherein the network module further comprises:
sub-modules configured to assume one of master or slave mode depending on a status of the network and in the slave mode to determine bandwidth requirements for the discrete and exclusive point-to-point communication links supported by the modern and in the master mode to allocate bandwidth among the discrete and exclusive point-to-point communication links supported by all modems on the shared wired communications medium using at least one of frequency division multiple access (FDMA) and time division multiple access (TDMA).