CROSS CARRIER RANDOM ACCESS CONFIGURATION

WIPO Patent Application WO/2021/056170

A1

Methods, systems, and devices for wireless communications are described. Random access channel (RACH) occasions may be scheduled on each component carrier (CC) of a carrier aggregation (CA) configuration that includes both a time division duplexing (TDD) band and at least one frequency division duplexing (FDD) band based on a synchronization signal/physical broadcast channel block (SSB) received in the TDD band. In some cases, the TDD band may be used to configure the RACH occasions in same and/or different CCs. Additionally or alternatively, the FDD band may configure the RACH occasions on its uplink CC based on SSBs received on other CCs. Additionally, the RACH occasions may be configured such that the UE avoids unavailable uplink slots when transmitting a first RACH message in a RACH occasion.

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WO/2023/219407	METHOD AND APPARATUS FOR SIDELINK SYNCHRONIZATION SIGNAL TRANSMISSION AND RECEPTION IN COMMUNICATION SYSTEM BASED ON UNLICENSED BAND
JP4881953	Technology to perform random access procedures on a wireless interface

CAO YIQING (US)
HAN BIN (US)
LEI JING (US)

PCT/CN2019/107452

April 01, 2021

September 24, 2019

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QUALCOMM INC (US)
CAO YIQING (CN)
HAN BIN (CN)
LEI JING (US)

H04W56/00

WO2012173565A1

2012-12-20

CN101772185A	2010-07-07
CN101646234A	2010-02-10
US20090040396A1	2009-02-12

SAMSUNG: "NR 4-step random access procedure", 3GPP DRAFT; R1-1700891, vol. RAN WG1, 10 January 2017 (2017-01-10), Spokane, Washington, pages 1 - 14, XP051203191

NTD PATENT & TRADEMARK AGENCY LTD. (CN)

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