Invention Application
- Patent Title: RACH PROCEDURES USING MULTIPLE PRACH TRANSMISSIONS
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Application No.: US17090827Application Date: 2020-11-05
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Publication No.: US20210058822A1Publication Date: 2021-02-25
- Inventor: Hung Ly , Wanshi Chen , Hao Xu , Peter Gaal
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Main IPC: H04W28/04
- IPC: H04W28/04 ; H04L1/08 ; H04L1/18 ; H04L5/00 ; H04L1/00 ; H04W72/04 ; H04W72/12 ; H04W74/08

Abstract:
Techniques are described herein to improve a link budget of physical random access channel (PRACH) transmissions used during a random access (RACH) procedure. The link budget of a PRACH transmission associated with the RACH procedure may be improved by transmitting multiple PRACH transmissions. The multiple PRACH transmissions may be combined to achieve some combining gain. Each retransmission of a PRACH transmission may be done at a higher power level than the previous PRACH transmission. If UE receives an indication that a target base station failed to successfully decode the PRACH transmission, the UE may retransmit the PRACH transmission but at a higher power level than the initial PRACH transmission. PRACH transmissions may be distributed across multiple slots. PRACH transmissions may be distributed across multiple frequency sub-bands in the same slot or across frequency sub-bands in the different slots.
Public/Granted literature
- US1638966A Poultry-fence attachment Public/Granted day:1927-08-16
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