Beam management and failure recovery for communications
Wireless devices may communicate with each other, for example, via sidelink. A wireless device may request reference signals from another wireless device to determine a new beam to prevent beam failure of wireless communications. A base station may send beam information for sidelink communications to assist a wireless device in recovering from a beam failure.
1 . A method comprising:
receiving, by a first wireless device, a beam failure recovery threshold for wireless communications between the first wireless device and a second wireless device;
based on a determination that a channel quality associated with the wireless communications fails to satisfy the beam failure recovery threshold, sending, to a base station, a message comprising:
an indication of a beam failure recovery of the wireless communications; and
an identifier of the second wireless device;
receiving, from the base station and based on the message, an indication of a reference signal; and
receiving, via the wireless communications and based on the reference signal, at least one transport block from the second wireless device.
2 . The method of claim 1 , further comprising:
receiving information indicating a received power threshold associated with the wireless communications; and
based on a determination that received signal power of at least one wireless communication, of the wireless communications, fails to satisfy the received power threshold, causing the second wireless device to send a second reference signal to the first wireless device.
3 . The method of claim 1 , wherein the indication of a reference signal comprises a beam of a sidelink.
4 . The method of claim 1 , further comprising:
based on a determination that a received signal power of at least one wireless communication, of the wireless communications, fails to satisfy a received power threshold, sending, to the second wireless device, a request for one or more reference signals;
receiving, from the second wireless device, the one or more reference signals; and
sending, via the wireless communications and based on the one or more reference signals, at least one transport block to the second wireless device.
5 . The method of claim 1 , wherein the receiving the beam failure recovery threshold comprises receiving the beam failure recovery threshold from at least one of:
the base station; or
the second wireless device.
6 . The method of claim 1 , further comprising:
determining, based on a reference signal received from the second wireless device, that the channel quality associated with the wireless communications fails to satisfy the beam failure recovery threshold.
7 . A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by one or more processors, cause the wireless device to:
receive a beam failure recovery threshold for wireless communications between the wireless device and a second wireless device;
based on a determination that a channel quality associated with the wireless communications fails to satisfy the beam failure recovery threshold, sending, to a base station, a message comprising:
an indication of a beam failure recovery of the wireless communications; and
an identifier of the second wireless device;
receive, from the base station and based on the message, an indication of a reference signal; and
receive, via the wireless communications and based on the reference signal, at least one transport block from the second wireless device.
8 . The wireless device of claim 7 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
receive information indicating a received power threshold associated with the wireless communications; and
based on a determination that received signal power of at least one wireless communication, of the wireless communications, fails to satisfy the received power threshold, cause the second wireless device to send a second reference signal to the wireless device.
9 . The wireless device of claim 7 , wherein the indication of a reference signal comprises a beam of a sidelink.
10 . The wireless device of claim 7 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
based on a determination that a received signal power of at least one wireless communication, of the wireless communications, fails to satisfy a received power threshold, send, to the second wireless device, a request for one or more reference signals;
receive, from the second wireless device, the one or more reference signals; and
send, via the wireless communications and based on the one or more reference signals, at least one transport block to the second wireless device.
11 . The wireless device of claim 7 , wherein the instructions, when executed by the one or more processors, cause the wireless device to receive the beam failure recovery threshold by receiving the beam failure recovery threshold from at least one of:
the base station; or
the second wireless device.
12 . The wireless device of claim 7 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
determine, based on a reference signal received from the second wireless device, that the channel quality associated with the wireless communications fails to satisfy the beam failure recovery threshold.
13 . One or more non-transitory computer readable media storing instructions that, when executed cause:
receiving a beam failure recovery threshold for wireless communications between a first wireless device and a second wireless device;
based on a determination that a channel quality associated with the wireless communications fails to satisfy the beam failure recovery threshold, sending, to a base station, a message comprising:
an indication of a beam failure recovery of the wireless communications; and
an identifier of the second wireless device;
receiving, from the base station and based on the message, an indication of a reference signal; and
receiving, via the wireless communications and based on the reference signal, at least one transport block from the second wireless device.
14 . The one or more non-transitory computer readable media of claim 13 , wherein the instructions, when executed, further cause:
receiving information indicating a received power threshold associated with the wireless communications; and
based on a determination that received signal power of at least one wireless communication, of the wireless communications, fails to satisfy the received power threshold, causing the second wireless device to send a second reference signal to the first wireless device.
15 . The one or more non-transitory computer readable media of claim 13 , wherein the indication of a reference signal comprises a beam of a sidelink.
16 . The one or more non-transitory computer readable media of claim 13 , wherein the instructions, when executed, further cause:
based on a determination that a received signal power of at least one wireless communication, of the wireless communications, fails to satisfy a received power threshold, sending, to the second wireless device, a request for one or more reference signals;
receiving, from the second wireless device, the one or more reference signals; and
sending, via the wireless communications and based on the one or more reference signals, at least one transport block to the second wireless device.
17 . The one or more non-transitory computer readable media of claim 13 , wherein the instructions, when executed, further cause receiving the beam failure recovery threshold by receiving the beam failure recovery threshold from at least one of:
the base station; or
the second wireless device.
18 . The one or more non-transitory computer readable media of claim 13 , wherein the instructions, when executed, further cause:
determining, based on a reference signal received from the second wireless device, that the channel quality associated with the wireless communications fails to satisfy the beam failure recovery threshold.