US 2020/0267771 A1 · FREQUENCY DIVISION MULTIPLEX RANDOM ACCESS CHANNEL RESOURCE CONFIGURATION AND SELECTION FOR NEW RADIO-UNLICENSED

Abstract

Frequency division multiplex (FDM) random access configuration and selection is disclosed for new radio (NR) unlicensed (NR-U) operations. For idle mode user equipment (UEs), the network may configured multiple frequency bands for random access. The UE may then select different frequencies for random access when default frequencies experience interference. For connected mode UEs, the network may configured which of multiple configured frequency bands the connected UE may use for autonomous random access transmissions. The UE may then select any of the allowed frequency bands for autonomous random access. Contention-free random access resources may be configured on one or more of the multiple configured frequency bands. When contention-free resources are available, the UEs may initially attempt access of the contention-free resources on the default frequency band before attempting random access on other configured bands or the UE is provided a priority of bands for access by the network.

Claims30

Dependent claims

A method of wireless communication, comprising:

detecting, by a user equipment (UE), a random access configuration message identifying one or more random access occasions on a plurality of frequency bands;
transmitting, by the UE, a random access request to a base station at a selected random access resource of the one or more random access occasions on a selected frequency band of the plurality of frequency bands;
monitoring, by the UE, a downlink frequency for a random access response in response to the random access request;
and
transmitting, by the UE, a connection request to the base station in response to detection of the random access response.

2 more elements

An apparatus configured for wireless communication, the apparatus comprising:

at least one processor;
and
a memory coupled to the at least one processor,
wherein the at least one processor is configured:
to detect, by a user equipment (UE), a random access configuration message identifying one or more random access occasions on a plurality of frequency bands;
to transmit, by the UE, a random access request to a base station at a selected random access resource of the one or more random access occasions on a selected frequency band of the plurality of frequency bands;
to monitor, by the UE, a downlink frequency for a random access response in response to the random access request;
and
to transmit, by the UE, a connection request to the base station in response to detection of the random access response.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/742,558Filed 14 Jan 2020

Priority

IN 20194100586914 Feb 2019

Published

20 Aug 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

H04L 5/001
The frequencies being orthogonal, e.g. OFDM or DMT: the frequencies being arranged in component carriers
H04W 72/0453
Based on the type of the allocated resource: resources in frequency domain, e.g. a carrier in FDMA
H04L 5/0048
Arrangements for allocating sub-channels of the transmission path: allocation of pilot signals, i.e. of signals known to the receiver
H04L 5/005
Allocation of pilot signals, i.e. of signals known to the receiver: of common pilots, i.e. pilots destined for multiple users or terminals

Frequency division multiplex random access channel resource configuration and selection for new radio-unlicensed

Life of this patent

Frequency division multiplex random access channel resource configuration and selection for new radio-unlicensed

Life of this patent

Abstract

Claims30