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

Claim 0:
1. A method, comprising:
receiving, at a user equipment of 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;
determining one or more beam indices of a cell fulfilling at least one criteria utilizing the beam reception level reference threshold;
selecting a first beam-specific random access channel preamble for one of the one or more beam indices;
performing random access based on at least the first beam-specific random access preamble;
receiving 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, by using the beam-specific backoff indicator to prohibit the user equipment 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-initiating 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.