US 12,184,368 B2 · Beam training and initial access

Abstract

The present application is at least directed to an apparatus including a non-transitory memory with stored instructions for beam link pairing the apparatus to a gNB in a new radio. A processor of the apparatus, operably coupled to the non-transitory memory, executes an instruction of detecting synchronization signal blocks (SS). Another executed instruction includes receiving PRACH resource information in a master information block on a PBCH or system information block (SIB) on the secondary PBCH. Another executed instruction includes transmitting PRACH preambles through a set of uplink transmission beams in a subframe including the group of SS blocks. The PRACH preambles may be obtained from the PRACH resource information. Even another executed instruction including determining the apparatus is in a radio resource control (RRC) connected state. A further executed instruction includes measuring, while in the RRC connected state, a multiple set of channel state information reference signals (CSI-RSs) configured by the gNB. Yet a further executed instruction includes transmitting, to the gNB, a single report based on the multiple set of CSI-RSs.

Claims20

Dependent claims

A wireless transmit/receive unit (WTRU) comprising a processor and memory, the processor and memory configured to:

detect synchronization signal (SS) blocks;
receive, from a gNB, physical random access channel (PRACH) resource information in a master information block (MIB) on a physical broadcast channel (PBCH) or a system information block (SIB) on a secondary PBCH (SPBCH), the PBCH or the SPBCH carrying system information indicating the PRACH resource information, the PRACH resource information being exclusively mapped for a group of the SS blocks, the SS blocks including a primary or secondary synchronous sequence and the PBCH;
transmit PRACH preambles through a set of uplink transmission beams in a subframe including the group of SS blocks, the PRACH preambles being obtained from the PRACH resource information;
determine the WTRU is in a radio resource control (RRC) connected state;
determine a measurement based on detecting the reference signal received power (RSRP) of one or more channel state information reference signals (CSI-RSs) configured by the gNB;
compare the measurement with a predefined threshold;
and
on the condition that the measurement is below the predefined threshold, transmit a report to the gNB, wherein the report comprises information related to the one or more CSI-RSs.

5 more elements

Dependencies are inferred from the claim text.

Beam training and initial access

Life of this patent

Beam training and initial access

Life of this patent

Abstract

Claims20