Physical layer feedback for in-device coexistence interference mitigation
Systems, apparatuses, and methods for transmitting IDC information on a physical uplink channel are provided. A described technique includes identifying, at a user equipment (UE), in-device coexistence (IDC) interference, and transmitting, to a base station, an IDC indicator or selected IDC solution identifying the IDC interference on a physical layer uplink channel.
1. A method for managing interference with user equipment (UE), comprising:
identifying in-device coexistence (IDC) interference; and
transmitting, to a base station, an IDC indicator identifying the IDC interference on a physical layer uplink channel, wherein the IDC indicator is multiplexed with at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a hybrid automated repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK) signal, a scheduling request (SR), or a rank indicator (RI).
2. The method of claim 1 , further comprising transmitting, to the base station, a selected IDC solution on the physical layer uplink channel.
3. The method of claim 1 , wherein the physical layer uplink channel is a physical uplink control channel (PUCCH).
4. The method of claim 3 , wherein the IDC indicator is transmitted on the PUCCH using an orthogonal sequence.
5. The method of claim 4 , wherein the orthogonal sequence is generated based on a Hadamard-Walsh code.
6. The method of claim 3 , further comprising transmitting a selected IDC solution using a Reed Muller code.
7. The method of claim 3 , wherein the IDC indicator is multiplexed with at least one of a channel quality indicator (CQI) using a PUCCH format 2 or a precoding matrix indicator (PMI) using a PUCCH format 2.
8. The method of claim 3 , wherein the IDC indicator is multiplexed with at least one of a hybrid automated repeat request (HARQ) acknowledgment/non-acknowledgment (ACK/NACK) signal using a PUCCH format 3 or a scheduling request (SR) using a PUCCH format 3.
9. The method of claim 3 , wherein the IDC indicator is transmitted on the PUCCH using a cyclic shifted sequence included in an IDC cyclic shifted sequence category.
10. The method of claim 1 , wherein the physical layer uplink channel is a physical uplink shared channel (PUSCH).
11. The method of claim 10 , wherein the IDC indicator is multiplexed with an ACK/NACK signal on the PUSCH.
12. The method of claim 11 , wherein the IDC indicator and the ACK/NACK signal are transmitted using a modulation order of 2, 4, or 6.
13. The method of claim 11 , further comprising transmitting a selected IDC solution on the PUSCH at a time that is substantially similar to a time the IDC indicator and the ACK/NACK signal are transmitted.
14. The method of claim 10 , wherein the IDC indicator is multiplexed with a rank indicator (RI) on the PUSCH.
15. The method of claim 14 , wherein the IDC indicator and the RI are transmitted using a modulation order of 2, 4, or 6.
16. The method of claim 14 , further comprising transmitting a selected IDC solution on the PUSCH at a time that is substantially similar to a time the IDC indicator and the RI are transmitted.
17. The method of claim 10 , wherein the IDC indicator is multiplexed with at least one of a channel quality indicator (CQI) or a precoding matrix indicator (PMI) on the PUSCH.
18. The method of claim 17 , wherein the IDC indicator is encoded using a Reed-Muller code or a tail biting convolutional code.
19. The method of claim 10 , wherein the IDC indicator is transmitted on the PUSCH using a cyclic shifted sequence included in an IDC cyclic shifted sequence category.
20. The method of claim 1 , wherein the IDC indicator is a one-bit indicator indicating an existence of IDC interference to the base station.
21. A user equipment (UE) comprising one or more processors configured to:
identify in-device coexistence (IDC) interference; and
transmit, to a base station, an IDC indicator identifying the IDC interference on a physical layer uplink channel, wherein the IDC indicator is multiplexed with at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a hybrid automated repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK) signal, a scheduling request (SR), or a rank indicator (RI).
22. The user equipment of claim 21 , the one or more processors further configured to transmit, to the base station, a selected IDC solution on the physical layer uplink channel.
23. The user equipment of claim 21 , wherein the physical layer uplink channel is a physical uplink control channel (PUCCH).
24. The user equipment of claim 23 , wherein the IDC indicator is transmitted on the PUCCH using an orthogonal sequence.
25. The user equipment of claim 24 , wherein the orthogonal sequence is generated based on a Hadamard-Walsh code.
26. The user equipment of claim 23 , the one or more processors further configured to transmit a selected IDC solution using a Reed Muller code.
27. The user equipment of claim 23 , wherein the IDC indicator is multiplexed with at least one of a channel quality indicator (CQI) using a PUCCH format 2 or a precoding matrix indicator (PMI) using a PUCCH format 2.
28. The user equipment of claim 23 , wherein the IDC indicator is multiplexed with at least one of a hybrid automated repeat request (HARQ) acknowledgment/non-acknowledgment (ACK/NACK) signal using a PUCCH format 3 or a scheduling request (SR) using a PUCCH format 3.
29. The user equipment of claim 23 , wherein the IDC indicator is transmitted on the PUCCH using a cyclic shifted sequence included in an IDC cyclic shifted sequence category.
30. The user equipment of claim 21 , wherein the physical layer uplink channel is a physical uplink shared channel (PUSCH).
31. The user equipment of claim 30 , wherein the IDC indicator is multiplexed with an ACK/NACK signal on the PUSCH.
32. The user equipment of claim 31 , wherein the IDC indicator and the ACK/NACK signal are transmitted using a modulation order of 2, 4, or 6.
33. The user equipment of claim 31 , the one or more processors further configured to transmit a selected IDC solution on the PUSCH at a time that is substantially similar to a time the IDC indicator and the ACK/NACK signal are transmitted.
34. The user equipment of claim 30 , wherein the IDC indicator is multiplexed with a rank indicator (RI) on the PUSCH.
35. The user equipment of claim 34 , wherein the IDC indicator and the RI are transmitted using a modulation order of 2, 4, or 6.
36. The user equipment of claim 34 , the one or more processors further configured to transmit a selected IDC solution on the PUSCH at a time that is substantially similar to a time the IDC indicator and the RI are transmitted.
37. The user equipment of claim 30 , wherein the IDC indicator is multiplexed with at least one of a channel quality indicator (CQI) or a precoding matrix indicator (PMI) on the PUSCH.
38. The user equipment of claim 37 , wherein the IDC indicator is encoded using a Reed-Muller code or a tail biting convolutional code.
39. The user equipment of claim 30 , wherein the IDC indicator is transmitted on the PUSCH using a cyclic shifted sequence included in an IDC cyclic shifted sequence category.
40. The user equipment of claim 21 , wherein the IDC indicator is a one-bit indicator indicating an existence of IDC interference to the base station.
41. A base station device comprising one or more processors configured to:
receive an IDC indicator from a user equipment (UE) identifying the IDC interference on a physical layer uplink channel, wherein the IDC indicator is multiplexed with at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a hybrid automated repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK) signal, a scheduling request (SR), or a rank indicator (RI); and
execute an IDC interference mitigation operation for the UE.
42. The base station device of claim 41 , the one or more processors further configured to receive, from the UE, a selected IDC solution on the physical layer uplink channel.
43. The base station device of claim 41 , wherein the physical layer uplink channel is a physical uplink control channel (PUCCH).
44. The base station device of claim 43 , wherein the IDC indicator is decoded by using an orthogonal sequence on the PUCCH.
45. The base station device of claim 44 , wherein the orthogonal sequence is generated based on a Hadamard-Walsh code.
46. The base station device of claim 43 , the one or more processors further configured to receive a selected IDC solution using a Reed Muller code.
47. The base station device of claim 43 , wherein the IDC indicator is received with at least one of a channel quality indicator (CQI) using a PUCCH format 2 or a precoding matrix indicator (PMI) using a PUCCH format 2.
48. The base station device of claim 43 , wherein the IDC indicator is received with at least one of a hybrid automated repeat request (HARQ) acknowledgment/non-acknowledgment (ACK/NACK) signal using a PUCCH format 3 or a scheduling request (SR) using a PUCCH format 3.
49. The base station device of claim 43 , wherein the IDC indicator is received on the PUCCH by using a cyclic shifted sequence included in an IDC cyclic shifted sequence category.
50. The base station device of claim 41 , wherein the physical layer uplink channel is a physical uplink shared channel (PUSCH).
51. The base station device of claim 50 , wherein the IDC indicator is received with an ACK/NACK signal on the PUSCH.
52. The base station device of claim 51 , wherein the IDC indicator and the ACK/NACK signal are received using a modulation order of 2, 4, or 6.
53. The base station device of claim 51 , the one or more processors further configured to receive a selected IDC solution on the PUSCH at a time that is substantially similar to a time the IDC indicator and the ACK/NACK signal are received.
54. The base station device of claim 50 , wherein the IDC indicator is received with a rank indicator (RI) on the PUSCH.
55. The base station device of claim 54 , wherein the IDC indicator and the RI are received using a modulation order of 2, 4, or 6.
56. The base station device of claim 54 , the one or more processors further configured to receive a selected IDC solution on the PUSCH at a time that is substantially similar to a time the IDC indicator and the RI are received.
57. The base station device of claim 50 , wherein the IDC indicator is received with at least one of a channel quality indicator (CQI) or a precoding matrix indicator (PMI) on the PUSCH.
58. The base station device of claim 57 , wherein the IDC indicator is decoded by using a Reed-Muller code or a tail biting convolutional code.
59. The base station device of claim 50 , wherein the IDC indicator is received on the PUSCH by using a cyclic shifted sequence included in an IDC cyclic shifted sequence category.
60. The base station device of claim 41 , wherein the IDC indicator is a one-bit indicator indicating an existence of IDC interference.