Data routing for OFDM transmissions

• US 9,820,209 B1
• Filed: 05/15/2017
• Issued: 11/14/2017
• Est. Priority Date: 06/13/2000
• Status: Expired due to Term

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Inventors: Agee, Brian G., Bromberg, Matthew C.
• Primary Examiner(s): Odom, Curtis
• Application Number:
  US15/595,432
• Publication Number:
  US 20170332304A1
• Time in Patent Office: 183 Days
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0443 utilizing "waterfilling" technique
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0465 taking power constraints at power amplifier or emission constraints, e.g. constant modulus, into account
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2605 Symbol extensions, e.g. Zero Tail, Unique Word [UW]
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 27/2646 using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 40/04 based on wireless node resources
• CPC Class Codes: H04W 52/241 : taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/265 : taking into account the quality of service QoS
• CPC Class Codes: H04W 52/42 : in systems with time, space, frequency or polarisation diversity
• CPC Class Codes: H04W 72/00 : Local resource management
• CPC Class Codes: H04W 72/04 : Wireless resource allocation
• CPC Class Codes: H04W 72/044 : based on the type of the allocated resource
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/542 : using measured or perceived quality
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Methods and systems are described for causing orthogonal frequency division multiplexing (OFDM) transmission of various portions of data via various nodes. For example, a first portion of the data may be transmitted, via a first node and using OFDM, to at least a second node. It may be determined that a second portion of the data is to be routed via a different node (such as a third node) for transmission. The second portion of the data may be transmitted, via the third node and using OFDM, to at least the second node.

Claims

1. A method comprising:

causing, via a first node to at least a second node, a first orthogonal frequency division multiplexing (OFDM) wireless transmission comprising a first portion of data, wherein the first OFDM wireless transmission uses a first pseudorandom sequence associated with the first node and a second pseudorandom sequence associated with the second node;

determining, based at least in part on availability of transmission resources associated with a third node, to route a second portion of the data via the third node for transmission; and

causing, via the third node to at least the second node, a second OFDM wireless transmission comprising the second portion of the data, wherein the second OFDM wireless transmission is at least partially concurrent with the first OFDM wireless transmission, and wherein the second OFDM wireless transmission uses a third pseudorandom sequence associated with the third node and the second pseudorandom sequence associated with the second node.

2. The method of claim 1, wherein the determining to route the second portion of the data via the third node for transmission is further based on availability of transmission resources associated with the first node.

3. The method of claim 1, wherein the determining to route the second portion of the data via the third node for transmission is further based on availability of transmission resources associated with at least one other node.

4. The method of claim 1, wherein one or both of the first node and the third node comprises a base station and the second node comprises a mobile terminal.

5. The method of claim 1, wherein the first OFDM wireless transmission and the second OFDM wireless transmission comprise an aggregate set of links with the second node.

6. The method of claim 1, wherein:

the data comprises user data;

one or both of the first pseudorandom sequence or the second pseudorandom sequence comprises a pilot; and

the first OFDM wireless transmission comprises;

a first OFDM symbol comprising at least a portion of the pilot without the user data; and

a second OFDM symbol comprising both the user data and the pilot.

7. The method of claim 1, wherein the second OFDM wireless transmission is at least partially concurrent with a time slot associated with the first OFDM wireless transmission.

8. The method of claim 1, wherein the determining, based at least in part on the availability of transmission resources associated with the third node, is performed based at least in part on information transmitted by the second node.

9. The method of claim 1, wherein the first node comprises a first plurality of antennas and the third node comprises a second plurality of antennas.

10. The method of claim 1, wherein the first node and the third node share at least one antenna.

11. The method of claim 1, wherein the first node is associated with a first cell and the third node is associated with a second cell.

12. A method comprising:

causing, via a first node to at least a second node, a first orthogonal frequency division multiplexing (OFDM) wireless transmission comprising;

a first portion of data, a first pseudorandom sequence associated with the first node, and a second pseudorandom sequence associated with the second node;

determining, based at least in part on availability of transmission resources associated with a third node, to route a second portion of the data via the third node for transmission; and

causing, via the third node to at least the second node, a second OFDM wireless transmission comprising;

the second portion of the data, a third pseudorandom sequence associated with the third node, and the second pseudorandom sequence associated with the second node, wherein the second OFDM wireless transmission is at least partially concurrent with the first OFDM wireless transmission.

13. The method of claim 12, wherein the determining to route the second portion of the data via the third node for transmission is further based on availability of transmission resources associated with the first node.

14. The method of claim 12, wherein one or both of the first node and the third node comprises a base station and the second node comprises a mobile terminal.

15. The method of claim 12, wherein:

the data comprises user data;

one or both of the first pseudorandom sequence or the second pseudorandom sequence comprises a pilot; and

the first OFDM wireless transmission comprises;

a first OFDM symbol comprising at least a portion of the pilot without the user data; and

a second OFDM symbol comprising both the user data and the pilot.

16. The method of claim 12, wherein the second OFDM wireless transmission is at least partially concurrent with a time slot associated with the first OFDM wireless transmission.

17. The method of claim 12, wherein the determining, based at least in part on the availability of transmission resources associated with the third node, is performed based at least in part on information from the second node.

18. The method of claim 12, wherein the first node and the third node share at least one antenna.

19. A method comprising:

causing, via a first node to at least a second node, a first orthogonal frequency division multiplexing (OFDM) wireless transmission comprising a first portion of data, wherein the first OFDM wireless transmission uses a first pseudorandom sequence associated with the first node and a second pseudorandom sequence associated with the second node;

determining a third node based at least in part on availability of transmission resources associated with one or more of a plurality of nodes, wherein the plurality of nodes comprises the first node and the third node; and

causing, via the third node to at least the second node, a second OFDM wireless transmission comprising a second portion of the data, wherein the second OFDM wireless transmission is at least partially concurrent with the first OFDM wireless transmission, and wherein the second OFDM wireless transmission uses a third pseudorandom sequence associated with the third node and the second pseudorandom sequence associated with the second node.

20. The method of claim 19, wherein the determining the third node comprises determining the third node based at least in part on availability of transmission resources associated with the third node.

21. The method of claim 19, wherein the determining the third node comprises determining the third node based at least in part on the availability of transmission resources associated with the third node and availability of transmission resources associated with the first node.

22. The method of claim 19, wherein one or both of the first node and the third node comprises a base station and the second node comprises a mobile terminal.

23. The method of claim 19, wherein:

the data comprises user data;

one or both of the first pseudorandom sequence or the second pseudorandom sequence comprises a pilot; and

the first OFDM wireless transmission comprises;

a first OFDM symbol comprising at least a portion of the pilot without the user data; and

a second OFDM symbol comprising both the user data and the pilot.

24. The method of claim 19, wherein the determining the third node is performed based at least in part on information transmitted by the second node.

25. The method of claim 19, wherein the first node and the third node share at least one antenna.

26. A method comprising:

receiving, by a second node from a first node, a first orthogonal frequency division multiplexing (OFDM) wireless transmission comprising a first portion of data, wherein the first OFDM wireless transmission uses a first pseudorandom sequence associated with the first node and a second pseudorandom sequence associated with the second node;

receiving, by the second node from a third node that was determined based at least in part on availability of transmission resources associated with the third node, a second OFDM wireless transmission comprising a second portion of the data, wherein the second OFDM wireless transmission is at least partially concurrent with the first OFDM wireless transmission, and wherein the second OFDM wireless transmission uses a third pseudorandom sequence associated with the third node and the second pseudorandom sequence associated with the second node; and

determining, by the second node from the first OFDM wireless transmission and the second OFDM wireless transmission, at least part of the first portion of the data and at least part of the second portion of the data.

27. The method of claim 26, wherein the third node was determined further based on availability of transmission resources associated with the first node.

28. The method of claim 26, wherein one or both of the first node and the third node comprises a base station and the second node comprises a mobile terminal.

29. The method of claim 26, further comprising transmitting, by the second node, information, wherein the third node was determined based at least in part on the information.

30. A second node comprising:

one or more antennas; and

circuitry configured to;

receive, via at least one of the one or more antennas and from a first node, a first orthogonal frequency division multiplexing (OFDM) wireless transmission comprising a first portion of data, wherein the first OFDM wireless transmission uses a first pseudorandom sequence associated with the first node and a second pseudorandom sequence associated with the second node;

receive, via at least one of the one or more antennas and from a third node that was determined based at least in part on availability of transmission resources associated with the third node, a second OFDM wireless transmission comprising a second portion of the data, wherein the second OFDM wireless transmission uses a third pseudorandom sequence associated with the third node and the second pseudorandom sequence associated with the second node; and

determine, from the first OFDM wireless transmission and the second OFDM wireless transmission, at least part of the first portion of the data and at least part of the second portion of the data.

31. The second node of claim 30, wherein the third node was determined further based on availability of transmission resources associated with the first node.

32. The second node of claim 30, wherein one or both of the first node and the third node comprises a base station and the second node comprises a mobile terminal.

33. The second node of claim 30, wherein the circuitry is further configured to cause wireless transmission of information, and wherein the third node was determined based at least in part on the information.

34. The second node of claim 30, wherein the circuitry comprises a processor.

35. A system comprising:

a network comprising a plurality of nodes, wherein the plurality of nodes comprises;

a first node comprising;

first circuitry configured to cause, to at least a second node, a first orthogonal frequency division multiplexing (OFDM) wireless transmission comprising a first portion of data, wherein the first OFDM wireless transmission uses a first pseudorandom sequence associated with the first node and a second pseudorandom sequence associated with the second node; and

a third node comprising;

second circuitry configured to cause, to at least the second node, a second OFDM wireless transmission comprising a second portion of the data, wherein the second OFDM wireless transmission is at least partially concurrent with the first OFDM wireless transmission, and wherein the second OFDM wireless transmission uses a third pseudorandom sequence associated with the third node and the second pseudorandom sequence associated with the second node,

wherein the network is configured to determine, based at least in part on availability of transmission resources associated with the third node, to route the second portion of the data via the third node for transmission.

36. The system of claim 35, wherein the network is configured to determine to route the second portion of the data via the third node for transmission further based on availability of transmission resources associated with the first node.

37. The system of claim 35, wherein the network is configured to determine to route the second portion of the data via the third node for transmission further based on availability of transmission resources associated with at least one other node.

38. The system of claim 35, wherein one or both of the first node and the third node comprises a base station and the second node comprises a mobile terminal.

39. The system of claim 35, wherein the first OFDM wireless transmission and the second OFDM wireless transmission comprise an aggregate set of links with the second node.

40. The system of claim 35, wherein:

the data comprises user data;

one or both of the first pseudorandom sequence or the second pseudorandom sequence comprises a pilot; and

the first OFDM wireless transmission comprises;

a first OFDM symbol comprising at least a portion of the pilot without the user data; and

a second OFDM symbol comprising both the user data and the pilot.

41. The system of claim 35, wherein the second OFDM wireless transmission is at least partially concurrent with a time slot associated with the first OFDM wireless transmission.

42. The system of claim 35, wherein the network is configured to determine, based at least in part on information transmitted by the second node, to route the second portion of the data via the third node for transmission.

43. The system of claim 35, wherein the first node comprises a first plurality of antennas and the third node comprises a second plurality of antennas.

44. The system of claim 35, wherein the first node and the third node share at least one antenna.

45. The system of claim 35, wherein the first node is associated with a first cell and the third node is associated with a second cell.

46. The system of claim 35, wherein the first circuitry comprises a first processor and the second circuitry comprises a second processor.

47. The system of claim 35, wherein the network further comprises at least one controller, and wherein the network is configured to determine, based at least in part on information from the at least one controller, to route the second portion of the data.

48. The system of claim 35, further comprising the second node.

60. The system of claim 46, wherein:

the data comprises user data;

one or both of the first pseudorandom sequence or the second pseudorandom sequence comprises a pilot; and

the first OFDM wireless transmission comprises;

a first OFDM symbol comprising at least a portion of the pilot without the user data; and

a second OFDM symbol comprising both the user data and the pilot.

49. A system comprising:

a network comprising a plurality of nodes, wherein the plurality of nodes comprises;

a first node comprising;

first circuitry configured to cause, to at least a second node, a first orthogonal frequency division multiplexing (OFDM) wireless transmission comprising;

a first portion of data, a first pseudorandom sequence associated with the first node, and a second pseudorandom sequence associated with the second node; and

a third node comprising;

second circuitry configured to cause, to at least the second node, a second OFDM wireless transmission comprising;

a second portion of the data, a third pseudorandom sequence associated with the third node, and the second pseudorandom sequence associated with the second node, wherein the second OFDM wireless transmission is at least partially concurrent with the first OFDM wireless transmission,

wherein the network is configured to determine, based at least in part on availability of transmission resources associated with the third node, to route the second portion of the data via the third node for transmission.

50. The system of claim 49, wherein the network is configured to determine to route the second portion of the data via the third node for transmission further based on availability of transmission resources associated with the first node.

51. The system of claim 49, wherein one or both of the first node and the third node comprises a base station and the second node comprises a mobile terminal.

52. The system of claim 49, wherein:

the data comprises user data;

one or both of the first pseudorandom sequence or the second pseudorandom sequence comprises a pilot; and

the first OFDM wireless transmission comprises;

a first OFDM symbol comprising at least a portion of the pilot without the user data; and

a second OFDM symbol comprising both the user data and the pilot.

53. The system of claim 49, wherein the second OFDM wireless transmission is at least partially concurrent with a time slot associated with the first OFDM wireless transmission.

54. The system of claim 49, wherein the network is configured to determine, based at least in part on information from the second node, to route the second portion of the data via the third node for transmission.

55. The system of claim 49, wherein the first node and the third node share at least one antenna.

56. A system comprising:

a network comprising a plurality of nodes, wherein the plurality of nodes comprises;

a first node comprising;

first circuitry configured to cause, to at least a second node, a first orthogonal frequency division multiplexing (OFDM) wireless transmission comprising a first portion of data, wherein the first OFDM wireless transmission uses a first pseudorandom sequence associated with the first node and a second pseudorandom sequence associated with the second node; and

a third node comprising;

second circuitry configured to cause, to at least the second node, a second OFDM wireless transmission comprising a second portion of the data, wherein the second OFDM wireless transmission is at least partially concurrent with the first OFDM wireless transmission, and wherein the second OFDM wireless transmission uses a third pseudorandom sequence associated with the third node and the second pseudorandom sequence associated with the second node,

wherein the network is configured to determine the third node based at least in part on availability of transmission resources associated with one or more of the plurality of nodes.

57. The system of claim 56, wherein the network is configured to determine the third node based at least in part on availability of transmission resources associated with the third node.

58. The system of claim 56, wherein the network is configured to determine the third node based at least in part on the availability of transmission resources associated with the third node and availability of transmission resources associated with the first node.

59. The system of claim 56, wherein one or both of the first node and the third node comprises a base station and the second node comprises a mobile terminal.

61. The system of claim 56, wherein the network is configured to determine the third node based at least in part on information transmitted by the second node.

62. The system of claim 56, wherein the first node and the third node share at least one antenna.