CA2453897A1 - Communication system with multicarrier telephony transport - Google Patents
Communication system with multicarrier telephony transport Download PDFInfo
- Publication number
- CA2453897A1 CA2453897A1 CA002453897A CA2453897A CA2453897A1 CA 2453897 A1 CA2453897 A1 CA 2453897A1 CA 002453897 A CA002453897 A CA 002453897A CA 2453897 A CA2453897 A CA 2453897A CA 2453897 A1 CA2453897 A1 CA 2453897A1
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- CA
- Canada
- Prior art keywords
- data
- channels
- further including
- head end
- subscriber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
- Small-Scale Networks (AREA)
- Telephonic Communication Services (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The communication system includes a hybrid fiber/coax distribution network. A head end provides for downstream transmission of telephony and control data in a first frequency bandwidth over the hybrid fiber/coax distribution network and reception of upstream telephony and control data in a second frequency bandwidth over the hybrid fiber/coax distribution network. The head end includes a head end multicarrier modem for modulating downstream telephony information on a plurality of orthogonal carriers in the first frequency bandwidth and demodulating upstream telephony information modulated on a plurality of orthogonal carriers in the second frequency bandwidth. The system includes service units, operatively connected to the hybrid fiber/coax distribution network for upstream transmission of telephony and control data and for receipt of the downstreaan control data and telephony. Also provided is a method and apparatus for performing a Fast Fourier Transform (FFT).
Claims (36)
1. A method of computer data transmission over a telecommunications network having a head end connected to a plurality of remote subscribers, the computer data originating from one or more general purpose digital computers, the data transmitted to the remote subscribers in a plurality of data channels accessible to carry data between the head end and amy one of the subscribers, the method comprising the steps of:
a) in response to a signal received from a subscriber premise (the "destination premise") over the network, automatically setting up a data path between the head end and the destination premise by selectively assigning one ormore of the data channels (the "assigned channels") to transmit the computer data between the head end and the destination premise, the assigned channels determined by reference to a database of provisioning information, the assigned channels maintaining a substantially constant data transfer bandwidth between the head end and the destination premise; and b) breaking the data path and reassigning one or more of the assigned channels to another data path in the network so that the bandwidth of the data channels can be shared by subscribers in the network.
a) in response to a signal received from a subscriber premise (the "destination premise") over the network, automatically setting up a data path between the head end and the destination premise by selectively assigning one ormore of the data channels (the "assigned channels") to transmit the computer data between the head end and the destination premise, the assigned channels determined by reference to a database of provisioning information, the assigned channels maintaining a substantially constant data transfer bandwidth between the head end and the destination premise; and b) breaking the data path and reassigning one or more of the assigned channels to another data path in the network so that the bandwidth of the data channels can be shared by subscribers in the network.
2. A method according to claim 1 further including the step of assigning more data channels in the path from the head end to the subscriber than from the subscriber to the head end to provide asymmetrical data transport.
3. A method according to claim 1 further including the step of signaling the subscriber premise to quiesce any data transfer from the subscriber premise to the head end, and then changing the number of assigned channels for the data path so that bandwidth may be adjusted during the time a data path is established.
4. A method according to claim 1 further including the step of transmitting data over the data channels in digitally encoded Radio Frequency (RF) signals.
5. A method according to claim 4 further including the step of scrambling the RF signals whereby security for the data carried in the channels is provided.
6. A method according to claim 4 further wherein the network is a point to multipoint network, and further including the step of broadcasting the downstream data channels to the subscriber premises and synchronizing the RF on the upstream data channels.
7. A method according to claim 1 further including the step of assigning data channels based on the availability of channels to meet demand on bandwidth in the network.
8. A method according to claim 1 further including the step of assigning data channels so that a group of subscribers is guaranteed a minimum bandwidth of data transmission.
9. A method according to claim 7 further including the step of assigning data channels so that a group of subscribers is guaranteed a minimum bandwidth of data transmission.
10. A method according to claim 1 further including the step of using the data channels to transmit telephony data, received from and delivered a public telephone network, between the head end a the destination premise.
11. A method according to claim 10 further including the step of assigning data channels to transmit telephony data between the head and the destination premise independently of the assignment of the assigned data channels which transmit the computer data.
12. A method according to claim 11 further including the step of assigning more data channels in the path from the head end to the subscriber than from the subscriber to the head end to provide asymmetrical data transport.
13. A method according to claim 11 further including the step of signaling the subscriber premise to quiesce any data transfer from the subscriber premise to the head end, and then changing the number of assigned channels for the data path so that bandwidth may be adjusted during the time a data path is established.
14. A method according to claim 11 further including the step of transmitting data over the data channels in digitally encoded Radio Frequency (RF) signals.
15. A method according to claim 14 further including the step of scrambling the RF signals whereby security for the data carried in the channels is provided.
16. A method according to claim 14 further wherein the network is a point to multipoint network, and further including the step of broadcasting the downstream data channels to the subscriber premises and synchronizing the RF on the upstream data channels.
17. A method according to claim 10 further including the step of assigning data channels based on the availability of channels to meet demand on bandwidth in the network.
18. A method according to claim 10 further including the step of assigning data channels so that a group of subscribers is guaranteed a minimum bandwidth of data transmission.
19. A system for computer data transmission cover a telecommunications network having a head end connected to a plurality of remote subscribers, the computer data originating from one or more general purpose digital computers, the data transmitted to the remote subscribers in a plurality of data channels accessible to carry data between the head end and any one of the subscribers, the method comprising:
a) a provisioning computer including computer program code responsive to a signal received from a subscriber premise (the "destination premise") over the network, to set up a data path between the head end and the destination premise by selectively assigning one or more of the data channels (the "assigned channels") to transmit the computer data between the head end and the destination premise, the provisioning computer referring to a database of provisioning information to specify the number of assigned channels, the assigned channels maintaining a substantially constant data transfer bandwidth between the head end and the destination premise; and b) the provisioning computer further including computer program code for breaking the data path and reassigning one or more of the assigned channels to another data path in the network so that the bandwidth of the data channels can be shared by subscribers in the network.
a) a provisioning computer including computer program code responsive to a signal received from a subscriber premise (the "destination premise") over the network, to set up a data path between the head end and the destination premise by selectively assigning one or more of the data channels (the "assigned channels") to transmit the computer data between the head end and the destination premise, the provisioning computer referring to a database of provisioning information to specify the number of assigned channels, the assigned channels maintaining a substantially constant data transfer bandwidth between the head end and the destination premise; and b) the provisioning computer further including computer program code for breaking the data path and reassigning one or more of the assigned channels to another data path in the network so that the bandwidth of the data channels can be shared by subscribers in the network.
20. A system according to claim 19 further including computer program code for assigning more data channels in the path from the head end to the subscriber than from the subscriber to the head end to provide asymmetrical data transport.
21. A system according to claim 19 further including computer program code for initiating a signal to the subscriber premise to quiesce any data transfer from the subscriber premise to the head end, and then changing the number of assigned channels for the data path so that bandwidth may be adjusted during the time a data path is established.
22. A system according to claim 19 further including an RF modulator for transmitting data over the data channels in digitally encoded Radio Frequency (RF) signals.
23. A system according to claim 22 further including an RF scrambling circuit receiving the RF and outputting scrambled RF whereby security for the data carried in the channels is provided.
24. A system according to claim 22 further wherein the network is a point to multipoint network, and further including a distribution node which causes the downstream data channels to be broadcast to the subscriber premises, and further including RF transmission circuits in the subscriber premises which are synchronized to apply the synchronized RF on the upstream data channels.
25. A system according to claim 19 further including computer program code for assigning data channels based on the availability of channels to meet demand on bandwidth in the network.
26. A system according to claim 19 further including computer program code for assigning data channels so that a group of subscribers is guaranteed a minimum bandwidth of data transmission.
27. A system according to claim 25 further including computer program code for assigning data channels so that a group of subscribers is guaranteed a minimum bandwidth of data transmission.
28. A system according to claim 19 further including computer program code for assigning data channels to transmit telephony data, received from and delivered a public telephone network, between the head end a the destination premise.
29. A system according to claim 28 further including computer program code for assigning data channels to transmit telephony data between the head and the destination premise independently of the assignment of the assigned data channels which transmit the computer data.
30. A system according to claim 29 further including computer program code for assigning more data channels in the path from the head end to the subscriber than from the subscriber to the head end to provide asymmetrical data transport.
31. A system according to claim 29 further including computer program code for causing a signal to be transmitted to the subscriber premise to quiesce any data transfer from the subscriber premise to the head end, and then changing the number of assigned channels for the data path so that bandwidth may be adjusted during the time a data path is established.
32. A system according to claim 29 further including computer program code for transmitting data over the data channels in digitally encoded Radio Frequency (RF) signals.
33. A system according to claim 32 further including a scrambling circuit receiving the RF and outputting scrambled RF signals whereby security for the data carried in the channels is provided.
34. A system according to claim 32 further wherein the network is a point to multipoint network, and further including a data distribution node which broadcasts the downstream data channels to the subscriber premises and further including RF transmission circuits in the subscriber premises which are synchronized to apply the synchronized RF on the upstream data channels.
35. A system according to claim 29 further including computer program code for assigning data channels based on the availability of channels to meet demand on bandwidth in the network.
36. A method according to claim 29 further including the computer program code for assigning data channels so that a group of subscribers is guaranteed a minimum bandwidth of data transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2690127A CA2690127C (en) | 1996-01-24 | 1997-01-24 | Communication system with multicarrier telephony transport |
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1050696P | 1996-01-24 | 1996-01-24 | |
| US1049796P | 1996-01-24 | 1996-01-24 | |
| US60/010,497 | 1996-01-24 | ||
| US60/010,506 | 1996-01-24 | ||
| US65040896A | 1996-05-20 | 1996-05-20 | |
| US08/650,408 | 1996-05-20 | ||
| US08/673,002 | 1996-06-28 | ||
| US08/673,002 US6334219B1 (en) | 1994-09-26 | 1996-06-28 | Channel selection for a hybrid fiber coax network |
| CA002205986A CA2205986C (en) | 1996-01-24 | 1997-01-24 | Communication system with multicarrier telephony transport |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002205986A Division CA2205986C (en) | 1996-01-24 | 1997-01-24 | Communication system with multicarrier telephony transport |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2690127A Division CA2690127C (en) | 1996-01-24 | 1997-01-24 | Communication system with multicarrier telephony transport |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2453897A1 true CA2453897A1 (en) | 1997-07-31 |
| CA2453897C CA2453897C (en) | 2010-09-21 |
Family
ID=32074660
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2453897A Expired - Lifetime CA2453897C (en) | 1996-01-24 | 1997-01-24 | Communication system with multicarrier telephony transport |
| CA002453896A Expired - Lifetime CA2453896C (en) | 1996-01-24 | 1997-01-24 | Communication system with multicarrier telephony transport |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002453896A Expired - Lifetime CA2453896C (en) | 1996-01-24 | 1997-01-24 | Communication system with multicarrier telephony transport |
Country Status (1)
| Country | Link |
|---|---|
| CA (2) | CA2453897C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2446848A (en) * | 2007-01-12 | 2008-08-27 | Technetix Ltd | A filter for providing higher frequency information carrying signals on the same conductor as a lower frequency power carrying signal |
| CN112578415B (en) * | 2020-11-06 | 2023-10-13 | 中国科学院国家空间科学中心 | Digital frequency locking method and loop based on adaptive filter |
-
1997
- 1997-01-24 CA CA2453897A patent/CA2453897C/en not_active Expired - Lifetime
- 1997-01-24 CA CA002453896A patent/CA2453896C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2453896C (en) | 2005-10-11 |
| CA2453896A1 (en) | 1997-07-31 |
| CA2453897C (en) | 2010-09-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20170124 |
|
| MKEX | Expiry |
Effective date: 20170124 |