System and method for in band full duplex communication in radio network

Patent metadata

Field	Value
Publication number	US-9923706-B2
Application number	US-201615211443-A
Country	US
Kind code	B2
Filing date	Jul 15, 2016
Priority date	Jul 17, 2015
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

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.

First claim

What is claimed is:

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, wh

Assignees

• Centre Of Excellence In Wireless Tech
• Indian Institute Of Tech Madras

Inventors

• Sharma Ankit
• Milleth Jeniston Deviraj Klutto
• Ganti Radha Krishna
• Kaimalettu Sunil
• Ramamurthi Bhaskar

Classifications

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04L5/0048 Primary

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L5/0062

  Avoidance of ingress interference, e.g. ham radio channels · CPC title

• H04L5/1461

  Suppression of signals in the return path, i.e. bidirectional control circuits · CPC title

• H04L5/14 Primary

  Two-way operation using the same type of signal, i.e. duplex · CPC title