# US 2019/0357253 A1 · Random access in dynamic and shared spectrums

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- Number: US 2019/0357253 A1
- Document ID: US20190357253A1
- Status: Published application
- Kind: A1
- Application number: 16/530,024
- Filed: 2019-08-02
- Published: 2019-11-21
- Earliest claimed: 2012-02-24
- Assignees: InterDigital Patent Holdings, Inc.
- Applicants: InterDigital Patent Holdings, Inc.
- Inventors: Rocco Di Girolamo; Martino M. Freda; Jean-Louis Gauvreau; Scott Laughlin; Debashish Purkayastha
- Web page: https://patentgrep.com/patent/US20190357253A1

## CPC

- H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04W 16/14: Spectrum sharing arrangements {between different networks}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Systems and methods for using a communication system in a spectrum are provided. For example, a random access or RACH procedure may be performed where the random access or RACH procedure may be configured to reduce secondary interference and/or to be used in a pixel-based environment. The random access or RACH procedure may include selecting a RACH preamble; sending a RACH preamble and/or format information; determining a transmission power of the RACH preamble and/or the format information; determining a random access radio network temporary identifier (RA-RNTI) and preamble ID associated with the RACH preamble; and/or selecting a physical RACH (PRACH).

## Claims

### Claim at position 1

1-58. (canceled)

### Claim 59

A method for a wireless transmit/receive unit (WTRU) to perform random access, the method comprising:
determining a value for a random access channel (RACH) factor;
determining a value of a preamble parameter based on the determined value for the RACH factor; and
sending at least one RACH preamble based on the determined value of the preamble parameter.