Invention Grant
- Patent Title: UE selection of contention-free and contention-based random access for handover
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Application No.: US16851856Application Date: 2020-04-17
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Publication No.: US11382007B2Publication Date: 2022-07-05
- Inventor: Sumeeth Nagaraja , Tao Luo , Makesh Pravin John Wilson , Sony Akkarakaran , Juan Montojo , Shengbo Chen , Wooseok Nam , Xiao Feng Wang , Kaushik Chakraborty
- 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: H04W36/00
- IPC: H04W36/00 ; H04W74/00 ; H04W74/08 ; H04W74/02 ; H04W36/08 ; H04W74/04

Abstract:
This disclosure generally relates to systems, devices, apparatuses, products, and methods for wireless communication. A communication system may include a user equipment (UE) that receives a configuration for contention-free random access (CFRA) and a configuration for contention-based random access (CBRA). The UE determines a first random access resource. The first random access resource maps to one or more beams from a target base station. The UE determines a beam quality associated with the first random access resource. The UE initiates a random access request using the CFRA when the first random access resource is a contention-free resource, and the beam quality of the first random access resource is above a threshold beam quality. The UE initiates the random access request using the CBRA when the first random access resource is the contention-free resource, and the beam quality of the first random access resource is below the threshold beam quality.
Public/Granted literature
- US20200245198A1 UE SELECTION OF CONTENTION-FREE AND CONTENTION-BASED RANDOM ACCESS FOR HANDOVER Public/Granted day:2020-07-30
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