Invention Grant
- Patent Title: Timing advance signaling in a physical downlink control channel
-
Application No.: US16592308Application Date: 2019-10-03
-
Publication No.: US11265918B2Publication Date: 2022-03-01
- Inventor: Muhammad Nazmul Islam , Navid Abedini , Samel Celebi , Tao Luo , Jianghong Luo , Karl Georg Hampel , Junyi Li
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Qualcomm Incorporated
- Main IPC: H04W72/12
- IPC: H04W72/12 ; H04W74/08 ; H04W56/00 ; H04W74/02 ; H04B7/06 ; H04W76/11 ; H04W72/04

Abstract:
Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for transmitting a first random-access channel (RACH) message and receiving a second RACH message that includes a timing advance command (TAC) in a physical downlink control channel (PDCCH). These techniques may be used by a user equipment (UE) or an integrated access backhaul (IAB) node to achieve time synchronization while limiting overhead. In one example, in an IAB network, an IAB node may transmit a first RACH message to a neighbor node, and the IAB node may receive a TAC in a PDCCH of a second RACH message from the neighbor node. In another example, in a beam failure recovery (BFR) procedure, a UE may transmit a first RACH message to a base station, and the UE may receive a TAC in a PDCCH of a second RACH message from the base station.
Information query