Random access procedure with multiple beams
A random-access procedure with multiple beams for a wireless device can include transmitting a first preamble using a first spatial filter and a second spatial filter. If the wireless device does not receive a random-access response to the first preamble, the wireless device can determine a third spatial filter for transmitting a second preamble. In the event of the third spatial filter being different from the first spatial filter and the second spatial filter, a power ramping counter can be suspended. Additionally, the wireless device can transmit the second preamble using a transmission power determined based on the power ramping counter.
1 . 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 configuration parameters of a cell, wherein the configuration parameters indicate:
a plurality of reference signals (RSS); and
one or more reference signal received power (RSRP) thresholds for determining number of message 1 (Msg1) repetitions;
determine, for a random-access procedure, a first number of Msg1 repetitions based on a comparison of:
a first RSRP of a first RS of the plurality of RSs; and
the one or more RSRP thresholds;
transmit, for the random-access procedure and using a first transmit power, the first number of Msg1 repetitions of a first preamble, wherein the first transmit power is determined based on the first RS;
determine, for the random-access procedure, a second number of Msg1 repetitions based on a comparison of:
a second RSRP of a second RS of the plurality of RSs; and
the one or more RSRP thresholds; and
transmit, for the random-access procedure and using a second transmit power, the second number of Msg1 repetitions of a second preamble, wherein the second transmit power is determined based on a power ramping counter that is incremented based on the first RS being the same as the second RS.
2 . The wireless device of claim 1 , wherein the instructions further cause the wireless device to determine transmission of the first preamble to be unsuccessful based on not receiving a random-access response during a time window.
3 . The wireless device of claim 1 , wherein the first number of Msg1 repetitions comprises a first plurality of repetitions and the second number of Msg1 repetitions comprises a second plurality of repetitions.
4 . The wireless device of claim 1 , wherein the first number of Msg1 repetitions is determined based on the first RSRP satisfying at least one of the one or more RSRP thresholds.
5 . The wireless device of claim 1 , wherein the second number of Msg1 repetitions is determined based on the second RSRP satisfying at least one of the one or more RSRP thresholds.
6 . The wireless device of claim 1 , wherein incrementing the power ramping counter is further based on at least one of
a value of a preamble transmission counter being greater than one; or
not receiving a listen-before-talk (LBT) failure indication.
7 . The wireless device of claim 1 , wherein a first one of the one or more RSRP thresholds corresponds to the first number of Msg1 repetitions and a second one of the one or more RSRP thresholds corresponds to the second number of Msg1 repetitions.
8 . A method, comprising:
receiving, by a wireless device, configuration parameters of a cell, wherein the configuration parameters indicate:
a plurality of reference signals (RSS); and
one or more reference signal received power (RSRP) thresholds for determining number of message 1 (Msg1) repetitions;
determining, by the wireless device for a random-access procedure, a first number of Msg1 repetitions based on a comparison of:
a first RSRP of a first RS of the plurality of RSs; and
the one or more RSRP thresholds;
transmitting, by the wireless device for the random-access procedure and using a first transmit power, the first number of Msg1 repetitions of a first preamble, wherein the first transmit power is determined based on the first RS;
determining, by the wireless device, for the random-access procedure, a second number of Msg1 repetitions based on a comparison of:
a second RSRP of a second RS of the plurality of RSs; and
the one or more RSRP thresholds; and
transmitting, by the wireless device for the random-access procedure and using a second transmit power, the second number of Msg1 repetitions of a second preamble, wherein the second transmit power is determined based on a power ramping counter that is incremented based on the first RS being the same as the second RS.
9 . The method of claim 8 , further comprising determining transmission of the first preamble to be unsuccessful based on not receiving a random-access response during a time window.
10 . The method of claim 8 , wherein the first number of Msg1 repetitions comprises a first plurality of repetitions and the second number of Msg1 repetitions comprises a second plurality of repetitions.
11 . The method of claim 8 , wherein the first number of Msg1 repetitions is determined based on the first RSRP satisfying at least one of the one or more RSRP thresholds.
12 . The method of claim 8 , wherein the second number of Msg1 repetitions is determined based on the second RSRP satisfying at least one of the one or more RSRP thresholds.
13 . The method of claim 8 , wherein incrementing the power ramping counter is further based on at least one of
a value of a preamble transmission counter being greater than one; or
not receiving a listen-before-talk (LBT) failure indication.
14 . The method of claim 8 , wherein a first one of the one or more RSRP thresholds corresponds to the first number of Msg1 repetitions and a second one of the one or more RSRP thresholds corresponds to the second number of Msg1 repetitions.
15 . A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:
receive configuration parameters of a cell, wherein the configuration parameters indicate:
a plurality of reference signals (RSS); and
one or more reference signal received power (RSRP) thresholds for determining number of message 1 (Msg1) repetitions;
determine, for a random-access procedure, a first number of Msg1 repetitions based on a comparison of:
a first RSRP of a first RS of the plurality of RSs; and
the one or more RSRP thresholds;
transmit, for the random-access procedure and using a first transmit power, the first number of Msg1 repetitions of a first preamble, wherein the first transmit power is determined based on the first RS;
determine, for the random-access procedure, a second number of Msg1 repetitions based on a comparison of:
a second RSRP of a second RS of the plurality of RSs; and
the one or more RSRP thresholds; and
transmit, for the random-access procedure and using a second transmit power, the second number of Msg1 repetitions of a second preamble, wherein the second transmit power is determined based on a power ramping counter that is incremented based on the first RS being the same as the second RS.
16 . The non-transitory computer-readable medium of claim 15 , wherein the instructions further cause the wireless device to determine transmission of the first preamble to be unsuccessful based on not receiving a random-access response during a time window.
17 . The non-transitory computer-readable medium of claim 15 , wherein the first number of Msg1 repetitions comprises a first plurality of repetitions and the second number of Msg1 repetitions comprises a second plurality of repetitions.
18 . The non-transitory computer-readable medium of claim 15 , wherein the first number of Msg1 repetitions is determined based on the first RSRP satisfying at least one of the one or more RSRP thresholds and the second number of Msg1 repetitions is determined based on the second RSRP satisfying at least one of the one or more RSRP thresholds.
19 . The non-transitory computer-readable medium of claim 15 , wherein incrementing the power ramping counter is further based on at least one of
a value of a preamble transmission counter being greater than one; or
not receiving a listen-before-talk (LBT) failure indication.
20 . The non-transitory computer-readable medium of claim 15 , wherein a first one of the one or more RSRP thresholds corresponds to the first number of Msg1 repetitions and a second one of the one or more RSRP thresholds corresponds to the second number of Msg1 repetitions.