Beam failure recovery request transmission
Systems, apparatuses, and methods are described for wireless communications. A base station may transmit an indication of a type of a beam failure recovery request. A wireless device may detect a beam failure and transmit a beam failure recovery requested based on the type.
1. A method comprising:
receiving, by a wireless device from a base station, one or more messages comprising a plurality of parameters, wherein the plurality of parameters indicates:
a first plurality of reference signals;
a second plurality of reference signals;
one or more random access preambles; and
a beam failure recovery type indicator;
detecting, based on at least one of the first plurality of reference signals, at least one beam failure;
after the detecting the at least one beam failure, selecting, based on the beam failure recovery type indicator and a quality of the second plurality of reference signals, a preamble of the one or more random access preambles; and
transmitting the selected preamble.
2. The method of claim 1 , wherein the first plurality of reference signals comprises at least one of:
synchronization signal blocks;
demodulation reference signals of a physical broadcast channel; or
channel state information reference signals.
3. The method of claim 1 , wherein the second plurality of reference signals comprises at least one of:
synchronization signal blocks;
demodulation reference signals of a physical broadcast channel; or
channel state information reference signals.
4. The method of claim 1 , wherein the transmitting the selected preamble comprises transmitting, based on the beam failure recovery type indicator indicating a beam failure recovery type other than a first beam failure recovery type, an indication of a candidate beam.
5. The method of claim 1 , wherein the selecting is further based on whether the wireless device detects at least one candidate reference signal of the second plurality of reference signals.
6. The method of claim 1 , wherein the detecting the at least one beam failure comprises:
determining that a quality of at least one reference signal of the first plurality of reference signals is below a threshold.
7. The method of claim 1 , further comprising:
before the selecting the preamble, determining that a quality of at least one reference signal of the second plurality of reference signals is above a threshold.
8. A method comprising:
determining, by a base station, a beam failure recovery type for a wireless device;
transmitting, by the base station to the wireless device, one or more messages comprising a plurality of parameters, wherein the plurality of parameters indicates:
a first plurality of reference signals;
a second plurality of reference signals;
one or more random access preambles; and
a beam failure recovery type indicator; and
receiving, from the wireless device, a preamble, wherein the preamble is based on:
the beam failure recovery type indicator; and
a quality of the second plurality of reference signals.
9. The method of claim 8 , wherein the first plurality of reference signals comprises at least one of:
synchronization signal blocks;
demodulation reference signals of a physical broadcast channel; or
channel state information reference signals.
10. The method of claim 8 , wherein the second plurality of reference signals comprises at least one of:
synchronization signal blocks;
demodulation reference signals of a physical broadcast channel; or
channel state information reference signals.
11. The method of claim 8 , wherein the receiving the preamble comprises receiving an indication of a candidate beam.
12. The method of claim 8 , further comprising determining, based on the receiving the preamble, whether the wireless device received the beam failure recovery type indicator.
13. The method of claim 8 , further comprising:
determining, based on the preamble, at least one beam failure associated with the wireless device; and
determining that a quality of at least one reference signal of the first plurality of reference signals is below a threshold.
14. The method of claim 8 , further comprising:
after the receiving the preamble, determining that a quality of at least one reference signal of the second plurality of reference signals is above a threshold.
15. A method comprising:
receiving, by a wireless device from a base station, one or more messages comprising a plurality of parameters, wherein the plurality of parameters indicates:
a plurality of reference signals; and
a beam failure recovery type indicator;
detecting, based on at least one of the plurality of reference signals, at least one beam failure;
determining, based on the beam failure recovery type indicator, a type of a beam failure recovery request for the at least one beam failure; and
transmitting, via a random access channel resource selected based on the type of the beam failure recovery request, a preamble associated with the beam failure recovery request.
16. The method of claim 15 , further comprising:
selecting, based on the type of the beam failure recovery request, the random access channel resource from:
a first available random access channel resource; or
a second random access channel resource different from the first available random access channel resource.
17. The method of claim 15 , wherein:
the plurality of parameters indicates one or more random access preambles; and
the plurality of reference signals comprises:
a first plurality of reference signals; and
a second plurality of reference signals.
18. The method of claim 17 , further comprising:
after detecting the at least one beam failure, selecting, based on the beam failure recovery type indicator and a quality of the second plurality of reference signals, the preamble,
wherein the detecting the at least one beam failure is based on at least one of the first plurality of reference signals.
19. The method of claim 15 , further comprising:
after detecting the at least one beam failure, selecting, based on the beam failure recovery type indicator indicating a first beam failure recovery type, a first random access channel resource associated with a first reference signal,
wherein the detecting the at least one beam failure is based on the first reference signal.
20. The method of claim 15 , further comprising:
after detecting the at least one beam failure, selecting, based on the beam failure recovery type indicator indicating a second beam failure recovery type, a first random access channel resource associated with a first reference signal,
wherein the detecting the at least one beam failure is based on a second reference signal associated with a second random access channel resource different from the first random access channel resource.
21. A method comprising:
transmitting, by a base station to a wireless device, one or more messages comprising a plurality of parameters, wherein the plurality of parameters indicates:
a plurality of reference signals; and
a beam failure recovery type indicator;
receiving, via a random access channel resource selected based on a type of a beam failure recovery request, a preamble associated with the beam failure recovery request, wherein the type of the beam failure recovery request is based on the beam failure recovery type indicator; and
transmitting, to the wireless device and after receiving the preamble, a response for beam failure recovery.
22. The method of claim 21 , wherein:
the plurality of parameters indicates one or more random access preambles; and
the plurality of reference signals comprises:
a first plurality of reference signals; and
a second plurality of reference signals.
23. The method of claim 22 , wherein the preamble is associated with at least one of the second plurality of reference signals, and
wherein at least one beam failure is associated with at least one of the first plurality of reference signals.
24. The method of claim 21 , wherein:
the beam failure recovery type indicator indicates a first beam failure recovery type;
the receiving the preamble comprises receiving the preamble via a first random access channel resource associated with a first reference signal; and
at least one beam failure is associated with the first reference signal.
25. The method of claim 21 , wherein:
the beam failure recovery type indicator indicates a second beam failure recovery type;
the receiving the preamble comprises receiving the preamble via a first random access channel resource associated with a first reference signal; and
at least one beam failure is associated with a second reference signal associated with a second random access channel resource different from the first random access channel resource.
26. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive, from a base station, one or more messages comprising a plurality of parameters, wherein the plurality of parameters indicates:
a first plurality of reference signals;
a second plurality of reference signals;
one or more random access preambles; and
a beam failure recovery type indicator;
detect, based on at least one of the first plurality of reference signals, at least one beam failure;
after detecting the at least one beam failure, select, based on the beam failure recovery type indicator and a quality of the second plurality of reference signals, a preamble of the one or more random access preambles; and
transmit the selected preamble.
27. The wireless device of claim 26 , wherein the first plurality of reference signals comprises at least one of:
synchronization signal blocks;
demodulation reference signals of a physical broadcast channel; or
channel state information reference signals.
28. The wireless device of claim 26 , wherein the second plurality of reference signals comprises at least one of:
synchronization signal blocks;
demodulation reference signals of a physical broadcast channel; or
channel state information reference signals.
29. The wireless device of claim 26 , wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit the selected preamble by:
transmitting, based on the beam failure recovery type indicator indicating a beam failure recovery type other than a first beam failure recovery type, an indication of a candidate beam.
30. The wireless device of claim 26 , wherein the instructions, when executed by the one or more processors, cause the wireless device to select the preamble by selecting the preamble based on whether the wireless device detects at least one candidate reference signal of the second plurality of reference signals.
31. The wireless device of claim 26 , wherein the instructions, when executed by the one or more processors, cause the wireless device to detect the at least one beam failure by:
determining that a quality of at least one reference signal of the first plurality of reference signals is below a threshold.
32. The wireless device of claim 26 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
before selecting the preamble, determine that a quality of at least one reference signal of the second plurality of reference signals is above a threshold.
33. A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the base station to:
determine a beam failure recovery type for a wireless device;
transmit, to the wireless device, one or more messages comprising a plurality of parameters, wherein the plurality of parameters indicates:
a first plurality of reference signals;
a second plurality of reference signals;
one or more random access preambles; and
a beam failure recovery type indicator; and
receive, from the wireless device, a preamble, wherein the preamble is based on:
the beam failure recovery type indicator; and
a quality of the second plurality of reference signals.
34. The base station of claim 33 , wherein the first plurality of reference signals comprises at least one of:
synchronization signal blocks;
demodulation reference signals of a physical broadcast channel; or
channel state information reference signals.
35. The base station of claim 33 , wherein the second plurality of reference signals comprises at least one of:
synchronization signal blocks;
demodulation reference signals of a physical broadcast channel; or
channel state information reference signals.
36. The base station of claim 33 , wherein the instructions, when executed by the one or more processors, cause the base station to receive the preamble by receiving an indication of a candidate beam.
37. The base station of claim 33 , wherein the instructions, when executed by the one or more processors, cause the base station to determine, based on receiving the preamble, whether the wireless device received the beam failure recovery type indicator.
38. The base station of claim 33 , wherein the instructions, when executed by the one or more processors, cause the base station to:
determine, based on the preamble, at least one beam failure associated with the wireless device; and
determine that a quality of at least one reference signal of the first plurality of reference signals is below a threshold.
39. The base station of claim 33 , wherein the instructions, when executed by the one or more processors, cause the base station to:
after receiving the preamble, determine that a quality of at least one reference signal of the second plurality of reference signals is above a threshold.
40. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive, from a base station, one or more messages comprising a plurality of parameters, wherein the plurality of parameters indicates:
a plurality of reference signals; and
a beam failure recovery type indicator;
detect, based on at least one of the plurality of reference signals, at least one beam failure;
determine, based on the beam failure recovery type indicator, a type of a beam failure recovery request for the at least one beam failure; and
transmit, via a random access channel resource selected based on the type of the beam failure recovery request, a preamble associated with the beam failure recovery request.
41. The wireless device of claim 40 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
select, based on the type of the beam failure recovery request, the random access channel resource from:
a first available random access channel resource; or
a second random access channel resource different from the first available random access channel resource.
42. The wireless device of claim 40 , wherein:
the plurality of parameters indicates one or more random access preambles; and
the plurality of reference signals comprises:
a first plurality of reference signals; and
a second plurality of reference signals.
43. The wireless device of claim 42 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
after detecting the at least one beam failure, select, based on the beam failure recovery type indicator and a quality of the second plurality of reference signals, the preamble; and
detect the at least one beam failure further based on at least one of the first plurality of reference signals.
44. The wireless device of claim 40 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
after detecting the at least one beam failure, select, based on the beam failure recovery type indicator indicating a first beam failure recovery type, a first random access channel resource associated with a first reference signal; and
detect the at least one beam failure further based on the first reference signal.
45. The wireless device of claim 40 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
after detecting the at least one beam failure, select, based on the beam failure recovery type indicator indicating a second beam failure recovery type, a first random access channel resource associated with a first reference signal; and
detect the at least one beam failure further based on a second reference signal associated with a second random access channel resource different from the first random access channel resource.
46. A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the base station to:
transmit, to a wireless device, one or more messages comprising a plurality of parameters, wherein the plurality of parameters indicates:
a plurality of reference signals; and
a beam failure recovery type indicator;
receive, via a random access channel resource selected based on a type of a beam failure recovery request, a preamble associated with the beam failure recovery request, wherein the type of the beam failure recovery request is based on the beam failure recovery type indicator; and
transmit, to the wireless device and after receiving the preamble, a response for beam failure recovery.
47. The base station of claim 46 , wherein:
the plurality of parameters indicates one or more random access preambles; and
the plurality of reference signals comprises:
a first plurality of reference signals; and
a second plurality of reference signals.
48. The base station of claim 47 , wherein the preamble is associated with at least one of the second plurality of reference signals, and
wherein at least one beam failure is associated with at least one of the first plurality of reference signals.
49. The base station of claim 46 , wherein:
the beam failure recovery type indicator indicates a first beam failure recovery type;
the instructions, when executed by the one or more processors, cause the base station to receive the preamble by receiving the preamble via a first random access channel resource associated with a first reference signal; and
at least one beam failure is associated with the first reference signal.
50. The base station of claim 46 , wherein:
the beam failure recovery type indicator indicates a second beam failure recovery type;
the instructions, when executed by the one or more processors, cause the base station to receive the preamble by receiving the preamble via a first random access channel resource associated with a first reference signal; and
at least one beam failure is associated with a second reference signal associated with a second random access channel resource different from the first random access channel resource.