Patent ID: 11968718
Assignee: NOKIA TECHNOLOGIES OY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. An apparatus, comprising:
at least one processor; and
at least one memory including computer program code,
wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to:
receive, from a communication network, an indication to use at least one beam-specific random access channel parameter, wherein the at least one beam-specific random access channel parameter comprises a beam reception level reference threshold;
determine one or more beam indices of a cell fulfilling at least one criteria utilizing the beam reception level reference threshold;
select a first beam-specific random access channel preamble for one of the one or more beam indices;
perform random access based on at least the first beam-specific random access preamble;
receive a beam-specific backoff indicator for the one of the one or more beam indices in a random access response; and
when configured by the communication network, using the beam-specific backoff indicator to prohibit the apparatus from sending a random access channel signal using the first beam-specific random access channel preamble for a predefined time period for the one of the one or more beam indices, re-initiate random access utilizing a second beam-specific random access channel preamble for another one of the one or more beam indices based on a reception level of the another one of the one or more beam indices being equal to or higher than the beam reception level reference threshold.