CA2614957A1 - Cable data service method - Google Patents
Cable data service method Download PDFInfo
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- CA2614957A1 CA2614957A1 CA002614957A CA2614957A CA2614957A1 CA 2614957 A1 CA2614957 A1 CA 2614957A1 CA 002614957 A CA002614957 A CA 002614957A CA 2614957 A CA2614957 A CA 2614957A CA 2614957 A1 CA2614957 A1 CA 2614957A1
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- packet
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- 238000000034 method Methods 0.000 title claims 11
- 230000005641 tunneling Effects 0.000 claims abstract 14
- 230000005540 biological transmission Effects 0.000 claims 4
- 238000013507 mapping Methods 0.000 claims 3
- 238000005538 encapsulation Methods 0.000 claims 1
- 239000000835 fiber Substances 0.000 claims 1
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- Data Exchanges In Wide-Area Networks (AREA)
Abstract
A data receiving system having at least one input. The data receiving system includes a demodulator system for receiving packets in parallel over multiple channels. A tunneling destination, which is coupled to the demodulator system, receives and serializes the packets from the demodulator system.
Claims (35)
1. A data receiving system having at least one input, the data receiving system comprising:
a demodulator system for receiving packets in parallel over multiple channels;
and a tunneling destination, coupled to said demodulator system, said tunneling destination for receiving the packets from the demodulator system and for serializing the packets.
a demodulator system for receiving packets in parallel over multiple channels;
and a tunneling destination, coupled to said demodulator system, said tunneling destination for receiving the packets from the demodulator system and for serializing the packets.
2. The data receiving system of claim 1 wherein each of the multiple channels are RF channels and each of the multiple channels are received at a single input of the means for receiving.
3. The data receiving system of claim 2 wherein each RF channel carries packets that are compliant with the DOCSIS standard.
4. The data receiving system of claim 1 further comprising:
an analog-to-digital converter having an input adapted to receive RF input signals and having an output;
a plurality of digital filters, each of said filters having an input coupled to the output of said analog to digital converter and having an output; and a plurality of demodulators each of said plurality of demodulators having an input coupled to the output of a respective one of said filters and having an output and the output of each demodulator being coupled to said tunneling destination.
an analog-to-digital converter having an input adapted to receive RF input signals and having an output;
a plurality of digital filters, each of said filters having an input coupled to the output of said analog to digital converter and having an output; and a plurality of demodulators each of said plurality of demodulators having an input coupled to the output of a respective one of said filters and having an output and the output of each demodulator being coupled to said tunneling destination.
5. The system of claim 4 further comprising a down-converter circuit which receives a first RF input signal at the input of the demodulators and provides a down-converted signal to said analog to digital converter.
6. The system of claim 5 wherein the digital signal processors simulate filters having a bandpass filter characteristic.
7. The system of claim 4 wherein said demodulators are provided as QAM
demodulators.
demodulators.
8. The system of claim 4 further comprising a data transmission system.
9. The system of claim 8 wherein said data transmission system comprises:
a tunneling source having an input and a plurality of output channels, said tunneling source for receiving one or more packets at the input and for distributing the packets a plurality of output channels coupled to an output of said tunneling source;
a cable modem termination system (CMTS) coupled to receive packets from each of the plurality of tunneling source output channels and to transmit signals on a plurality of parallel output channels.
a tunneling source having an input and a plurality of output channels, said tunneling source for receiving one or more packets at the input and for distributing the packets a plurality of output channels coupled to an output of said tunneling source;
a cable modem termination system (CMTS) coupled to receive packets from each of the plurality of tunneling source output channels and to transmit signals on a plurality of parallel output channels.
10. The data transmitting system of claim 9 wherein the plurality of CMTS
output channels are RF channels.
output channels are RF channels.
11. The data transmitting system of claim 10 wherein each RF channel carries packets that are compliant with the DOCSIS standard.
12. The data transmitting system of claim 9 wherein said CMTS further comprises:
a CMTS router, having an input coupled to signals from said tunnel source and having a plurality of output ports;
a plurality of channel modulators, each of said plurality of channel modulators coupled to receive signals from a corresponding one of the CMTS router output ports.
a CMTS router, having an input coupled to signals from said tunnel source and having a plurality of output ports;
a plurality of channel modulators, each of said plurality of channel modulators coupled to receive signals from a corresponding one of the CMTS router output ports.
13. The data transmitting system of claim 12 further comprising:
a hybrid fiber coaxial (HFC) network coupled to the output of port of each of said plurality of channel modulators;
a plurality of demodulator circuits, each of the plurality of demodulator circuits having an input coupled to said HFC network and having an output;
a serializer having a plurality of input ports, each of the plurality of input ports coupled to a respective one of the output ports of said plurality of demodulator circuits and having a single output port.
a hybrid fiber coaxial (HFC) network coupled to the output of port of each of said plurality of channel modulators;
a plurality of demodulator circuits, each of the plurality of demodulator circuits having an input coupled to said HFC network and having an output;
a serializer having a plurality of input ports, each of the plurality of input ports coupled to a respective one of the output ports of said plurality of demodulator circuits and having a single output port.
14. The data transmitting system of claim 13 further comprising a TCP gateway having an input adapted to be coupled to a router and having an output coupled to an input of said tunnel source, said TCP gateway for terminating a TCP connection and for providing an acknowledgement signal a sending node.
15. A data transmission system having at least one input, the data transmission system comprising:
a tunneling source having an input and a plurality of output channels, said tunneling source for receiving one or more packets at the input and for distributing the packets a plurality of output channels coupled to an output of said tunneling source;
a cable modem termination system (CMTS) coupled to each of the plurality of tunneling source output channels, said CMTS for receiving signals on each of the plurality of tunneling source output channels and for transmitting signals on a plurality of parallel output channels.
a tunneling source having an input and a plurality of output channels, said tunneling source for receiving one or more packets at the input and for distributing the packets a plurality of output channels coupled to an output of said tunneling source;
a cable modem termination system (CMTS) coupled to each of the plurality of tunneling source output channels, said CMTS for receiving signals on each of the plurality of tunneling source output channels and for transmitting signals on a plurality of parallel output channels.
16. The data transmitting system of claim 14 wherein the plurality of CMTS
output channels are RF channels.
output channels are RF channels.
17. The data transmitting system of claim 15 wherein each RF channel carries packets that are compliant with the DOCSIS standard.
18. The data transmitting system of claim 14 wherein said CMTS further comprises:
a CMTS router, having an input coupled to signals from said tunnel source and having a plurality of output ports;
a plurality of channel modulators, each of said plurality of channel modulators having an input port coupled to receive signals from a corresponding one of the CMTS
router output ports and having an output port coupled to provided one of the CMTS
output channels.
a CMTS router, having an input coupled to signals from said tunnel source and having a plurality of output ports;
a plurality of channel modulators, each of said plurality of channel modulators having an input port coupled to receive signals from a corresponding one of the CMTS
router output ports and having an output port coupled to provided one of the CMTS
output channels.
19. The data transmitting system of claim 14 further comprising:
a plurality of channel modulators, each of said plurality of channel modulators coupled to receive signals from the output of said tunneling source;
a digital signal processor, coupled to receive signals from each of said plurality of channel modulators; and a digital-to-analog converter having an input coupled to receive signals from said digital signal processor.
a plurality of channel modulators, each of said plurality of channel modulators coupled to receive signals from the output of said tunneling source;
a digital signal processor, coupled to receive signals from each of said plurality of channel modulators; and a digital-to-analog converter having an input coupled to receive signals from said digital signal processor.
20. The data transmitting system of claim 17 wherein each of said plurality of channel demodulators comprises:
an analog-to-digital converter having an input coupled to receive signals from a corresponding one of the CMTS router output ports and having an output;
a plurality of bandpass filter circuits parallel coupled to the output of said analog-to-digital converter, each of said bandpass filter circuits having a passband characteristic which is offset in frequency from each of the other bandpass filter circuits;
a plurality of demodulator circuits, each of the plurality of demodulator circuits having an input coupled to the output of a respective one of said bandpass filter circuits and having an output;
a serializer having a plurality of input ports, each of the plurality of input ports coupled to a respective one of the output ports of said plurality of demodulator circuits and having a single output port.
an analog-to-digital converter having an input coupled to receive signals from a corresponding one of the CMTS router output ports and having an output;
a plurality of bandpass filter circuits parallel coupled to the output of said analog-to-digital converter, each of said bandpass filter circuits having a passband characteristic which is offset in frequency from each of the other bandpass filter circuits;
a plurality of demodulator circuits, each of the plurality of demodulator circuits having an input coupled to the output of a respective one of said bandpass filter circuits and having an output;
a serializer having a plurality of input ports, each of the plurality of input ports coupled to a respective one of the output ports of said plurality of demodulator circuits and having a single output port.
21. A system for transmitting signal packets, each of the packets having a destination address, from a source to two or more destinations, the system comprising:
a router having at least two address groups, said router coupled to receive packets, and to map each packet destination address to one of the address groups; and a tunnel source having an input coupled to said router and having an output and wherein for the packets having an original destination address which belongs to the first address group of said router, the tunnel source assigns each packet it receives to one of a plurality of addresses, each address being associated with a tunnel destination wherein each one of the tunnel destination addresses is mapped to an output channel and wherein for packets having an original destination address belonging to the second address group of said router are mapped onto a single output channel based upon their original address.
a router having at least two address groups, said router coupled to receive packets, and to map each packet destination address to one of the address groups; and a tunnel source having an input coupled to said router and having an output and wherein for the packets having an original destination address which belongs to the first address group of said router, the tunnel source assigns each packet it receives to one of a plurality of addresses, each address being associated with a tunnel destination wherein each one of the tunnel destination addresses is mapped to an output channel and wherein for packets having an original destination address belonging to the second address group of said router are mapped onto a single output channel based upon their original address.
22. The system of claim 21 wherein a new address of a packet is based upon the state of the output channels.
23. The system of claim 21 wherein a new address of a packet is based upon Quality of Service requirements.
24. The system of claim 21 wherein a new address of a packet is based upon traffic demands.
25. The system of claim 21 wherein:
said tunnel source corresponds to an IP tunnel source; and said tunnel destination corresponds to an IP tunnel destination.
said tunnel source corresponds to an IP tunnel source; and said tunnel destination corresponds to an IP tunnel destination.
26. A method for transmitting signal packets from a source to two or more destinations, the method comprising:
receiving a plurality of packets in a router, each of the packets having a destination address;
mapping the destination address of each packet to one of a plurality of address groups in the router; and for each packet, determining to which of the plurality of address groups in the router an original destination address of the packet belongs;
in response to the original destination address of the packet belonging to a first address group of the router, assigning each received packet to one of a plurality of addresses, each address being associated with a tunnel destination address with each one of the tunnel destination addresses being mapped to an output channel.
receiving a plurality of packets in a router, each of the packets having a destination address;
mapping the destination address of each packet to one of a plurality of address groups in the router; and for each packet, determining to which of the plurality of address groups in the router an original destination address of the packet belongs;
in response to the original destination address of the packet belonging to a first address group of the router, assigning each received packet to one of a plurality of addresses, each address being associated with a tunnel destination address with each one of the tunnel destination addresses being mapped to an output channel.
27. The method of claim 26 wherein in response to the original destination address of the packet belonging to a second address group of the router, mapping the original destination address of the packet onto a single output channel.
28. The method of claim 26 wherein assigning each received packet to one of a plurality of addresses includes assigning an address of a packet based upon the state of the output channels.
29. The method of claim 26 wherein assigning each received packet to one of a plurality of addresses includes assigning an address of a packet based upon Quality of Service requirements.
30. The method of claim 26 wherein assigning each received packet to one of a plurality of addresses includes assigning an address of a packet based upon traffic demands.
31. The system of claim 26 wherein:
said tunnel source corresponds to an IP tunnel source; and said tunnel destination corresponds to an IP tunnel destination.
said tunnel source corresponds to an IP tunnel source; and said tunnel destination corresponds to an IP tunnel destination.
32. An address allocation method comprising:
originating a packet at a first source address S, each of the packets having a destination address D wherein address D is an element of an address space F;
receiving the packet at a tunnel source wherein the tunnel source is coupled to a cable modem termination system (CMTS) via an interface having a first IP
address (T1);
determining in the tunnel source that the packet has a destination address D
which is an element of an address space F;
in response to the tunnel source determining that the packet has a destination address D which is an element of an address space F, dividing the packet into a plurality of sub-packets;
encapsulating each of the plurality of sub-packets, each of the encapsulated sub-packets having a source address and a destination address which define a tunnel between the tunnel source and a tunnel destination;
mapping each tunnel destination address onto a corresponding one of a plurality of cable channels; and routing the encapsulated sub-packets via the appropriate tunnel to the tunnel destination.
originating a packet at a first source address S, each of the packets having a destination address D wherein address D is an element of an address space F;
receiving the packet at a tunnel source wherein the tunnel source is coupled to a cable modem termination system (CMTS) via an interface having a first IP
address (T1);
determining in the tunnel source that the packet has a destination address D
which is an element of an address space F;
in response to the tunnel source determining that the packet has a destination address D which is an element of an address space F, dividing the packet into a plurality of sub-packets;
encapsulating each of the plurality of sub-packets, each of the encapsulated sub-packets having a source address and a destination address which define a tunnel between the tunnel source and a tunnel destination;
mapping each tunnel destination address onto a corresponding one of a plurality of cable channels; and routing the encapsulated sub-packets via the appropriate tunnel to the tunnel destination.
33. The method of claim 32 further comprising:
receiving the encapsulated sub-packets at the tunnel destination;
combining the channels to provide the original packets; and forwarding the packets in their original order to the destination.
receiving the encapsulated sub-packets at the tunnel destination;
combining the channels to provide the original packets; and forwarding the packets in their original order to the destination.
34. The method of claim 33 wherein combining the channels comprises removing the encapsulation headers from each of the encapsulated sub-packets to again provide the original packets.
35. The method of claim 34 wherein encapsulating comprises:
generating a new packet having a payload field;
placing the original packet in the payload field of the new packet; and adding a new packet header to the new packet with the new packet header having a source address corresponding to the address T1 and a destination address corresponding to one of a plurality of separate IP interfaces on the tunnel destination and wherein the destination address is part of an L address space and wherein each address pair formed by the source address of the new packet header and the destination address of the tunnel defines a separate tunnel.
generating a new packet having a payload field;
placing the original packet in the payload field of the new packet; and adding a new packet header to the new packet with the new packet header having a source address corresponding to the address T1 and a destination address corresponding to one of a plurality of separate IP interfaces on the tunnel destination and wherein the destination address is part of an L address space and wherein each address pair formed by the source address of the new packet header and the destination address of the tunnel defines a separate tunnel.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27566501P | 2001-03-14 | 2001-03-14 | |
| US60/275,665 | 2001-03-14 | ||
| US09/924,617 US6993050B2 (en) | 2001-03-14 | 2001-08-08 | Transmit and receive system for cable data service |
| US09/924,617 | 2001-08-08 | ||
| US09/924,599 US20020133618A1 (en) | 2001-03-14 | 2001-08-08 | Tunneling system for a cable data service |
| US09/924,639 | 2001-08-08 | ||
| US09/924,639 US6993353B2 (en) | 2001-03-14 | 2001-08-08 | Cable data service method |
| US09/924,599 | 2001-08-08 | ||
| CA002372415A CA2372415C (en) | 2001-03-14 | 2002-02-19 | Cable data service method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002372415A Division CA2372415C (en) | 2001-03-14 | 2002-02-19 | Cable data service method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2614957A1 true CA2614957A1 (en) | 2002-09-14 |
| CA2614957C CA2614957C (en) | 2012-11-13 |
Family
ID=39153766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2614957A Expired - Lifetime CA2614957C (en) | 2001-03-14 | 2002-02-19 | Cable data service method |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2614957C (en) |
-
2002
- 2002-02-19 CA CA2614957A patent/CA2614957C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2614957C (en) | 2012-11-13 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |