SYSTEM AND METHOD FOR IN BAND FULL DUPLEX COMMUNICATION IN RADIO NETWORK

• US 20170019238A1
• Filed: 07/15/2016
• Published: 01/19/2017
• Est. Priority Date: 07/17/2015
• Status: Active Grant

• Current Assignee: Centre of Excellence in Wireless Technology, Indian Institute of Technology Madras
• Original Assignee: Centre of Excellence in Wireless Technology, Indian Institute of Technology Madras
• Inventors: Sharma, Ankit, Ganti, Radha Krishna, Milleth, Jeniston Deviraj Klutto, Kaimalettu, Sunil, Ramamurthi, Bhaskar
• Granted Patent: US 9,923,706 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/54 using the same frequency for two directions of communication H04B1/44 takes precedence
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1461 Suppression of signals in the return path, i.e. bidirectional control circuits

Abstract

The embodiments herein provide a method for In Band Full Duplex (IBFD) communication in a radio network including at least one IBFD node, at least one first non-IBFD User Equipment (UE) and at least one second non-IBFD UE. The method includes transmitting by the at least one IBFD node a first signal to the at least one first non-IBFD UE over a forward channel, and receiving by the at least one IBFD node a second signal from the at least one second non-IBFD UE over the same forward channel simultaneously, where the second signal includes at least one of a pilot signal, Channel State Information (CSI), and control information, where the forward channel is orthogonal to a reverse channel in at least one of time, frequency, space, and code.

Claims

1. A method for In Band Full Duplex (IBFD) communication in a radio network comprising at least one IBFD node, at least one first non-IBFD User Equipment (UE), and at least one second non-IBFD UE, the method comprising:

transmitting by the at least one IBFD node a first signal to the at least one first non-IBFD UE over a forward channel, and receiving by the at least one IBFD node a second signal from the at least one second non-IBFD UE over the same forward channel simultaneously, wherein the second signal comprising at least one of a pilot signal, Channel State Information (CSI), and control information, wherein the forward channel is orthogonal to a reverse channel in at least one of time, frequency, space, and code.

2. The method of claim 1, wherein the at least one IBFD node determines resources in at least one of time, frequency, space, and code for transmitting the second signal from the at least one second non-IBFD UE.

3. The method of claim 2, wherein the second signal is received in one of a periodic interval and in the resources determined by the at least one IBFD node based on a plurality of parameters.

4. The method of claim 3, wherein one of the periodic interval and the resources are signaled by the at least one IBFD node to the at least one second non-IBFD UE.

5. The method of claim 3, wherein the periodic interval is one of specific and non-specific to the at least one second non-IBFD UE, wherein each of the periodic interval comprises a plurality of pilot transmissions by the at least one second non-IBFD UE.

6. The method of claim 3, wherein the plurality of parameters comprises at least one of a channel gain, a channel delay spread, a channel Doppler spread, interference information and location information of at least one of the first non-IBFD UE, the second non-IBFD UE and the at least one IBFD node.

7. The method of claim 1, wherein the at least one IBFD node determines a sequence for the pilot signal for transmitting the second signal from the at least one second non-IBFD UE.

8. The method of claim 7, wherein a resource for the sequence is allocated in one of a contiguous manner and a discontiguous manner in at least one of time and frequency.

9. The method of claim 7, wherein the sequence is one of common and unique for each of the at least one second non-IBFD UE.

10. The method of claim 9, wherein distance between the sequences unique for each of the at least one second non-IBFD UE is maximized.

11. The method of claim 9, wherein the at least one IBFD node performs one of broadcast at least one parameter for the sequence to each of the second non-IBFD UEs when the sequence is common to each of the second non-IBFD UEs, and unicast at least one parameter for the sequence to each of the second non-IBFD UEs when the sequence is unique to each of the second non-IBFD UEs.

12. The method of claim 11, wherein the at least one parameter for the sequence is at least one of a cell identifier, a beam identifier, a UE identifier, and a network identifier.

13. The method of claim 7, wherein a base sequence of the sequence is orthogonal for each neighboring IBFD node.

14. The method of claim 1, wherein the at least one IBFD node determines and signals an optimal power to be used by the at least one second non-IBFD UE for transmitting the second signal based on at least one attribute.

15. The method of claim 14, wherein the attribute comprises at least one of interference information, a location, timing advance and channel quality information.

16. The method of claim 14, wherein the optimal power is spread over at least one of a frequency and time in an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

17. The method of claim 1, wherein the at least one IBFD node receives the second signal on resources of the forward channel, wherein the resources are orthogonally allocated by the at least one IBFD node in at least one of time, frequency, space, and code to the at least one second non-IBFD UE.

18. The method of claim 1, wherein the pilot signal from the at least one second non-IBFD UE is orthogonal to a pilot signal from the IBFD node in at least one time, frequency, space, and code.

19. The method of claim 18, wherein the code is one of a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence, a maximal length m-sequence, and a Gold sequence.

20. The method of claim 1, wherein the method further comprising:

receiving, by the at least one IBFD node, a third signal from at least one third non-IBFD UE over the reverse channel, and transmitting by the at least one IBFD node a fourth signal to at least one fourth non-IBFD UE over the reverse channel simultaneously, wherein the fourth signal comprising at least one of a pilot signal, CSI, synchronization information, broadcast information, and control channel information.

21. The method of claim 20, wherein the control channel information comprises at least one of a Hybrid Automatic Repeat Request (HARQ) indication, a scheduling grant, modulation and coding index, and a power control information.

22. The method of claim 1, wherein the at least one IBFD node calibrates to use reciprocity of the forward channel based on at least one of a known sequence with a low periodicity and the pilot signal.

23. The method of claim 22, wherein the known sequence is transmitted by the second non-IBFD UE.

24. The method of claim 1, wherein the control information comprises at least one of a Hybrid Automatic Repeat Request (HARQ) indication, a scheduling request, a pre-coding matrix indication, a rank indication, interference information and Channel Quality Indicator (CQI).

25. The method of claim 1, wherein at least one of the at least one first non-IBFD UE and the at least one second non-IBFD UE is selected by the at least one IBFD node based on at least one of Interference information, location information, and channel gain.

26. An In Band Full Duplex (IBFD) node for IBFD communication in a radio network comprising at least one first non-IBFD User Equipment (UE) and at least one second non-IBFD UE, the IBFD node comprising:

a memory;

a processor, coupled to the memory, configured to;

transmit a first signal to the at least one first non-IBFD UE over a forward channel, and receive a second signal from the at least one second non-IBFD UE over the same forward channel simultaneously, wherein the second signal comprising at least one of a pilot signal, Channel State Information (CSI), and control information, wherein the forward channel is orthogonal to a reverse channel in at least one of time, frequency, space, and code.

27. The IBFD node of claim 26, wherein the at least one IBFD node determines resources in at least one of time, frequency, space, and code for transmitting the second signal from the at least one second non-IBFD UE.

28. The IBFD node of claim 27, wherein the second signal is received in one of a periodic interval and in the resources determined by the at least one IBFD node based on a plurality of parameters.

29. The IBFD node of claim 28, wherein one of the periodic interval and the resources are signaled by the at least one IBFD node to the at least one second non-IBFD UE.

30. The IBFD node of claim 28, wherein the periodic interval is one of specific and non-specific to the at least one second non-IBFD UE, wherein each of the periodic interval comprises a plurality of pilot transmissions by the at least one second non-IBFD UE.

31. The IBFD node of claim 28, the plurality of parameters comprises at least one of a channel gain, a channel delay spread, a channel Doppler spread, interference information, and location information of at least one of the first non-IBFD UE, the second non-IBFD UE, and the at least one IBFD node.

32. The IBFD node of claim 26, wherein the at least one IBFD node determines a sequence for the pilot signal for transmitting the second signal from the at least one second non-IBFD UE.

33. The IBFD node of claim 32, wherein a resource for the sequence is allocated in one of a contiguous manner and a discontiguous manner in at least one of time and frequency.

34. The IBFD node of claim 32, wherein the sequence is one of common and unique for each of the at least one second non-IBFD UE.

35. The IBFD node of claim 34, wherein distance between the sequences unique for each of the at least one second non-IBFD UE is maximized.

36. The IBFD node of claim 34, wherein the at least one IBFD node perform one of broadcast at least one parameter for the sequence to each of the second non-IBFD UEs when the sequence is common to each of the second non-IBFD UEs, and unicast at least one parameter for the sequence to each of the second non-IBFD UEs when the sequence is unique to each of the second non-IBFD UEs.

37. The IBFD node of claim 36, wherein the at least one parameter for the sequence is at least one of a cell identifier, a beam identifier, a UE identifier, and a network identifier.

38. The IBFD node of claim 32, wherein a base sequence of the sequence is orthogonal for each neighboring IBFD node.

39. The IBFD node of claim 26, wherein the at least one IBFD node determines and signals an optimal power to be used by the at least one second non-IBFD UE for transmitting the second signal based on at least one attribute.

40. The IBFD node of claim 39, wherein the attribute comprises interference information, a location, timing advance, and channel quality information.

41. The IBFD node of claim 39, wherein the optimal power is spread over at least one of a frequency and time in an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

42. The IBFD node of claim 26, wherein the at least one IBFD node receives the second signal on resources of the forward channel, wherein the resources are orthogonal allocated by the at least one IBFD node in at least one of time, frequency, space, and code to the at least one second non-IBFD UE.

43. The IBFD node of claim 26, wherein the pilot signal from the at least one second non-IBFD UE is orthogonal to a pilot signal from the IBFD node in at least one time, frequency, space, and code.

44. The IBFD node of claim 43, wherein the code is one of a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence, a maximal length m-sequence, and a Gold sequence.

45. The IBFD node of claim 26, wherein the processor is further configured to:

receive a third signal from the at least one third non-IBFD UE over the reverse channel, and transmit a fourth signal to at least one fourth non-IBFD UE over the reverse channel simultaneously, wherein the fourth signal comprising at least one of a pilot signal, CSI, synchronization information, broadcast information, and control channel information.

46. The IBFD node of claim 45, wherein the control information comprises at least one of a Hybrid Automatic Repeat Request (HARQ) indication, a scheduling grant, modulation and coding index, and a power control information.

47. The IBFD node of claim 26, wherein the at least one IBFD node calibrates to use reciprocity of the forward channel based on at least one of a known sequence with a low periodicity and the pilot signal.

48. The IBFD node of claim 47, wherein the known sequence is transmitted by the second non-IBFD UE.

49. The IBFD node of claim 26, wherein the control information comprises at least one of a Hybrid Automatic Repeat Request (HARQ) indication, a scheduling request, a pre-coding matrix indication, a rank indication, and Channel Quality Indicator (CQI).

50. The IBFD node of claim 26, wherein at least one of the at least one first non-IBFD UE and the at least one second non-IBFD UE is selected by the at least one IBFD node based on at least one of Interference information, location information, and channel gain.

51. A system for In Band Full Duplex (IBFD) communication, the system comprising:

at least one first non-IBFD User Equipment (UE);

at least one second non-IBFD UE; and

at least one IBFD node, configured to;

transmit a first signal to the at least one first non-IBFD UE over a forward channel, and receive a second signal from at least one second non-IBFD UE over the same forward channel simultaneously, wherein the second signal comprising at least one of a pilot signal, Channel State Information (CSI) and control information, wherein the forward channel is orthogonal to a reverse channel in at least one of time, frequency, space, and code.

52. The system of claim 51, wherein the at least one IBFD node is further configured to:

receive a third signal from the at least one third non-IBFD UE over the reverse channel, and transmit a fourth signal to the at least one fourth non-IBFD UE over the reverse channel simultaneously, wherein the fourth signal comprising at least one of a pilot signal, CSI, synchronization information, broadcast information, and control channel information.

53. A system for In Band Full Duplex (IBFD) communication, the system comprising:

at least one first non-IBFD node;

at least one second non-IBFD node; and

an IBFD User Equipment (UE), connected to the first non-IBFD node and the second non-IBFD node, configured to;

receive a first signal from the at least one first non-IBFD node and send a second signal to the at least one second non-IBFD node simultaneously on one of a forward channel and a reverse channel.

54. The system of claim 53, wherein the IBFD UE is further configured to send a third signal to the at least one first non-IBFD node and receive a fourth signal from the at least one second non-IBFD node simultaneously on one of the forward channel and the reverse channel.

55. The system of claim 53, wherein the IBFD UE is further configured to mitigate an interference generated by the second signal to the first signal using a self-interference cancellation mechanism.