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, one or more messages that indicate:
a plurality of uplink resources for beam failure recovery (BFR); and
a BFR type; and
based on at least one beam failure, transmitting an uplink signal, associated with the BFR type, via an uplink resource of the plurality of uplink resources.
2 . The method of claim 1 , wherein the BFR type comprises one of:
a first type of BFR in which the uplink signal comprises data associated with one or more candidate beams; or
a second type of BFR in which the uplink signal does not include data associated with candidate beams.
3 . The method of claim 1 , wherein the uplink resource is associated with a serving beam on which the at least one beam failure has occurred.
4 . The method of claim 1 , wherein the one or more messages further indicate a plurality of candidate beam reference signals; and
wherein the uplink resource is a PRACH resource associated with the plurality of candidate beam reference signals.
5 . The method of claim 1 , wherein the uplink resource is a PRACH resource associated with a serving beam; and
wherein the uplink signal indicates that the serving beam has failed and that no candidate beam has been identified.
6 . The method of claim 1 , wherein the one or more messages further indicate at least one beam failure detection reference signal, the method further comprising detecting, based on a determination that the at least one beam failure detection reference signal fails to satisfy a threshold, the at least one beam failure.
7 . The method of claim 1 , wherein the plurality of uplink resources comprise a plurality of physical random access channel (PRACH) resources;
wherein the uplink resource comprises a PRACH resource of the plurality of PRACH resources; and
wherein the transmitting the uplink signal is further based on the one or more messages.
8 . The method of claim 1 , wherein the one or more messages further indicate at least one beam failure detection reference signal and a plurality of candidate beam reference signals, the method further comprising:
determining that a first channel quality of the at least one beam failure detection reference signal fails to satisfy a first threshold;
determining that a second channel quality of at least one reference signal of the plurality of candidate beam reference signals satisfies a second threshold; and
transmitting a second uplink signal via another uplink resource, of the plurality of uplink resources, associated with one or more of the plurality of candidate beam reference signals.
9 . The method of claim 1 , wherein the one or more messages indicate at least one beam failure detection reference signal and a plurality of candidate beam reference signals, the method further comprising:
determining that a first channel quality of the at least one beam failure detection reference signal fails to satisfy a first threshold;
determining that a second channel quality of at least one reference signal of the plurality of candidate beam reference signals fails to satisfy a second threshold; and
transmitting a second uplink signal via another uplink resource, of the plurality of uplink resources, associated with a serving beam on which the at least one beam failure was detected.
10 . The method of claim 1 , wherein the one or more messages comprise one or more radio resource control messages comprising a plurality of parameters, and wherein the plurality of parameters comprises configuration parameters of a cell.
11 . A method comprising:
receiving, by a wireless device, one or more messages that indicate:
a plurality of physical random access channel (PRACH) resources; and
a beam failure recovery (BFR) type; and
transmitting, based on the one or more messages, for a BFR associated with the BFR type, and via a PRACH resource of the plurality of PRACH resources, an uplink signal.
12 . The method of claim 11 , wherein the BFR type comprises one of:
a first type of BFR in which the uplink signal comprises data associated with one or more candidate beams; or
a second type of BFR in which the uplink signal does not include data associated with candidate beams.
13 . The method of claim 11 , wherein the PRACH resource is associated with a serving beam on which the BFR has occurred.
14 . The method of claim 11 , wherein the one or more messages further indicate a plurality of candidate beam reference signals; and
wherein the PRACH resource is associated with the plurality of candidate beam reference signals.
15 . The method of claim 11 , wherein the PRACH resource is associated with a serving beam; and
wherein the uplink signal indicates that the serving beam has failed and that no candidate beam has been identified.
16 . The method of claim 11 , wherein the one or more messages further indicate at least one beam failure detection reference signal, the method further comprising detecting, based on a determination that the at least one beam failure detection reference signal fails to satisfy a threshold, at least one beam failure.
17 . The method of claim 11 , wherein the plurality of PRACH resources comprise a plurality of uplink resources;
wherein the PRACH resource comprises a uplink resource of the plurality of uplink resources; and
wherein the transmitting the PRACH signal is further based on on at least one beam failure.
18 . The method of claim 11 , wherein the one or more messages further indicate at least one beam failure detection reference signal and a plurality of candidate beam reference signals, the method further comprising:
determining that a first channel quality of the at least one beam failure detection reference signal fails to satisfy a first threshold;
determining that a second channel quality of at least one reference signal of the plurality of candidate beam reference signals satisfies a second threshold; and
transmitting a second uplink signal via another PRACH resource, of the plurality of PRACH resources, associated with one or more of the plurality of candidate beam reference signals.
19 . The method of claim 11 , wherein the one or more messages indicate at least one beam failure detection reference signal and a plurality of candidate beam reference signals, the method further comprising:
determining that a first channel quality of the at least one beam failure detection reference signal fails to satisfy a first threshold;
determining that a second channel quality of at least one reference signal of the plurality of candidate beam reference signals fails to satisfy a second threshold; and
transmitting a second uplink signal via another PRACH resource, of the plurality of PRACH resources, associated with a serving beam on which at least one beam failure was detected.
20 . The method of claim 11 , wherein the one or more messages comprise one or more radio resource control messages comprising a plurality of parameters, and wherein the plurality of parameters comprises configuration parameters of a cell.
21 . A method comprising:
transmitting, by a base station, one or more messages that indicate:
a plurality of uplink resources for beam failure recovery (BFR); and
a BFR type; and
based on at least one beam failure, receiving an uplink signal, associated with the BFR type, via an uplink resource of the plurality of uplink resources.
22 . The method of claim 21 , wherein the BFR type comprises one of:
a first type of BFR in which the uplink signal comprises data associated with one or more candidate beams; or
a second type of BFR in which the uplink signal does not include data associated with candidate beams.
23 . The method of claim 21 , wherein the uplink resource is associated with a serving beam on which the at least one beam failure has occurred.
24 . The method of claim 21 , wherein the one or more messages further indicate a plurality of candidate beam reference signals; and
wherein the uplink resource is a PRACH resource associated with the plurality of candidate beam reference signals.
25 . The method of claim 21 , wherein the uplink resource is a PRACH resource associated with a serving beam; and
wherein the uplink signal indicates that the serving beam has failed and that no candidate beam has been identified.
26 . The method of claim 21 , wherein the one or more messages further indicate at least one beam failure detection reference signal; and
wherein the receiving is based on a determination that the at least one beam failure detection reference signal fails to satisfy a threshold.
27 . The method of claim 21 , wherein the plurality of uplink resources comprise a plurality of physical random access channel (PRACH) resources;
wherein the uplink resource comprises a PRACH resource of the plurality of PRACH resources; and
wherein the receiving the uplink signal is further based on the one or more messages.
28 . The method of claim 21 , wherein the one or more messages indicate a plurality of candidate beam reference signals, the method further comprising:
based on a determination that a channel quality of at least one reference signal of the plurality of candidate beam reference signals satisfies a threshold, receiving a second uplink signal via a second uplink resource, of the plurality of uplink resources, associated with one or more of the plurality of candidate beam reference signals.
29 . The method of claim 21 , wherein the one or more messages indicate a plurality of candidate beam reference signals, the method further comprising:
based on a determination that a channel quality of at least one reference signal of the plurality of candidate beam reference signals fails to satisfy a threshold, receiving a second uplink signal via another uplink resource, of the plurality of uplink resources, associated with a serving beam on which the at least one beam failure was detected.
30 . The method of claim 21 , wherein the one or more messages comprise one or more radio resource control messages comprising a plurality of parameters, and wherein the plurality of parameters comprises configuration parameters of a cell.
31 . A method comprising:
transmitting, by a base station, one or more messages that indicate:
a plurality of physical random access channel (PRACH) resources; and
a beam failure recovery (BFR) type; and
receiving, based on the one or more messages, for a BFR associated with the BFR type, and via a PRACH resource of the plurality of PRACH resources, an uplink signal.
32 . The method of claim 31 , wherein the BFR type comprises one of:
a first type of BFR in which the uplink signal comprises data associated with one or more candidate beams; or
a second type of BFR in which the uplink signal does not include data associated with candidate beams.
33 . The method of claim 31 , wherein the PRACH resource is associated with a serving beam on which the BFR has occurred.
34 . The method of claim 31 , wherein the one or more messages further indicate a plurality of candidate beam reference signals; and
wherein the PRACH resource is associated with the plurality of candidate beam reference signals.
35 . The method of claim 31 , wherein the PRACH resource is associated with a serving beam; and
wherein the uplink signal indicates that the serving beam has failed and that no candidate beam has been identified.
36 . The method of claim 31 , wherein the one or more messages further indicate at least one beam failure detection reference signal; and
wherein the receiving is based on a determination that the at least one beam failure detection reference signal fails to satisfy a threshold.
37 . The method of claim 31 , wherein the plurality of PRACH resources comprise a plurality of uplink resources;
wherein the PRACH resource comprises a uplink resource of the plurality of uplink resources; and
wherein the receiving the PRACH signal is further based on on at least one beam failure.
38 . The method of claim 31 , wherein the one or more messages indicate a plurality of candidate beam reference signals, the method further comprising:
based on a determination that a channel quality of at least one reference signal of the plurality of candidate beam reference signals satisfies a threshold, receiving a second uplink signal via another PRACH resource, of the plurality of PRACH resources, associated with one or more of the plurality of candidate beam reference signals.
39 . The method of claim 31 , wherein the one or more messages indicate a plurality of candidate beam reference signals, the method further comprising:
based on a determination that a channel quality of at least one reference signal of the plurality of candidate beam reference signals fails to satisfy a threshold, receiving a second uplink signal via another PRACH resource, of the plurality of PRACH resources, associated with a serving beam on which at least one beam failure was detected.
40 . The method of claim 31 , wherein the one or more messages comprise one or more radio resource control messages comprising a plurality of parameters, and wherein the plurality of parameters comprises configuration parameters of a cell.