Access Procedures in Wireless Communications
Wireless communications for access procedures are described. One or more messages may indicate request for information regarding an access procedure, such as a random access procedure. Based on the request, a wireless device may transmit one or more reports associated with the access procedure, indicating results of one or more access procedures.
1 . A method comprising:
sending, by a base station to a wireless device, configuration parameters of a carrier comprising a plurality of bandwidth parts (BWPs);
sending, to the wireless device, a user equipment (UE) information request associated with random access (RA); and
receiving, from the wireless device and based on the UE information request, a UE information response message comprising:
information indicating a first BWP, of the carrier, for which the wireless device experienced a listen-before-talk (LBT) failure; and
information indicating a second BWP, of the carrier, for which the wireless device experienced an LBT failure.
2 . The method of claim 1 , wherein the UE information response message further comprises information indicating a number of preamble transmission attempts, on the first BWP, counted based on one or more LBT failure indications from a physical layer of the wireless device.
3 . The method of claim 1 , wherein the UE information response message further comprises information indicating a quantity of preamble transmissions via a third BWP of the carrier.
4 . The method of claim 1 , wherein the UE information request comprises information identifying the first BWP.
5 . The method of claim 1 , wherein an LBT failure comprises at least one of dropping, canceling, delaying, skipping, or aborting a preamble transmission in a random access occasion.
6 . One or more non-transitory, computer-readable media storing instructions that, when executed, configure a base station to:
send, to a wireless device, configuration parameters of a carrier comprising a plurality of bandwidth parts (BWPs);
send a user equipment (UE) information request associated with random access (RA); and
receive, based on the UE information request, a UE information response message comprising:
information indicating a first BWP, of the carrier, for which the wireless device experienced a listen-before-talk (LBT) failure; and
information indicating a second BWP, of the carrier, for which the wireless device experienced an LBT failure.
7 . The one or more non-transitory, computer-readable media of claim 6 , wherein the UE information response message further comprises information indicating a number of preamble transmission attempts, on the first BWP, counted based on one or more LBT failure indications from a physical layer of the wireless device.
8 . The one or more non-transitory, computer-readable media of claim 6 , wherein the UE information response message further comprises information indicating a quantity of preamble transmissions via a third BWP of the carrier.
9 . The one or more non-transitory, computer-readable media of claim 6 , wherein the UE information request comprises information identifying the first BWP.
10 . The one or more non-transitory, computer-readable media of claim 6 , wherein an LBT failure comprises at least one of dropping, canceling, delaying, skipping, or aborting a preamble transmission in a random access occasion.
11 . A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, configure the base station to:
send, to a wireless device, configuration parameters of a carrier comprising a plurality of bandwidth parts (BWPs);
send a user equipment (UE) information request associated with random access (RA); and
receive, based on the UE information request, a UE information response message comprising:
information indicating a first BWP, of the carrier, for which the wireless device experienced a listen-before-talk (LBT) failure; and
information indicating a second BWP, of the carrier, for which the wireless device experienced an LBT failure.
12 . The base station of claim 11 , wherein the UE information response message further comprises information indicating a number of preamble transmission attempts, on the first BWP, counted based on one or more LBT failure indications from a physical layer of the wireless device.
13 . The base station of claim 11 , wherein the UE information response message further comprises information indicating a quantity of preamble transmissions via a third BWP of the carrier.
14 . The base station of claim 11 , wherein the UE information request comprises information identifying the first BWP.
15 . The base station of claim 11 , wherein an LBT failure comprises at least one of dropping, canceling, delaying, skipping, or aborting a preamble transmission in a random access occasion.
16 . A system comprising:
a wireless device and a base station;
wherein the base station is configured to:
send, to the wireless device, configuration parameters of a carrier comprising a plurality of bandwidth parts (BWPs);
send a user equipment (UE) information request associated with random access (RA); and
receive, based on the UE information request, a UE information response message comprising:
information indicating a first BWP, of the carrier, for which the wireless device experienced a listen-before-talk (LBT) failure; and
information indicating a second BWP, of the carrier, for which the wireless device experienced an LBT failure; and
wherein the wireless device is configured to receive the configuration parameters from the base station.
17 . The system of claim 16 , wherein the UE information response message further comprises information indicating a number of preamble transmission attempts, on the first BWP, counted based on one or more LBT failure indications from a physical layer of the wireless device.
18 . The system of claim 16 , wherein the UE information response message further comprises information indicating a quantity of preamble transmissions via a third BWP of the carrier.
19 . The system of claim 16 , wherein the UE information request comprises information identifying the first BWP.
20 . The system of claim 16 , wherein an LBT failure comprises at least one of dropping, canceling, delaying, skipping, or aborting a preamble transmission in a random access occasion.
21 . The system of claim 16 , wherein the wireless device is configured to determine an LBT failure based on determining unsuccessful contention resolution for a preamble transmission.