Invention Grant
- Patent Title: Method and apparatus for obtaining uplink timing alignment on a secondary cell
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Application No.: US15815317Application Date: 2017-11-16
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Publication No.: US10588154B2Publication Date: 2020-03-10
- Inventor: Ghyslain Pelletier , Paul Marinier , Sung-Hyuk Shin , Janet A. Stern-Berkowitz
- Applicant: InterDigital Patent Holdings, Inc.
- Applicant Address: US DE Wilmington
- Assignee: InterDigital Patent Holdings, Inc.
- Current Assignee: InterDigital Patent Holdings, Inc.
- Current Assignee Address: US DE Wilmington
- Agency: Volpe and Koenig, P.C.
- Main IPC: H04W74/08
- IPC: H04W74/08 ; H04W56/00 ; H04W52/36 ; H04W52/32
Abstract:
A method for uplink timing alignment by a wireless transmit/receive unit is provided. The method includes receiving a PDCCH order on a PCell. In response to the PDCCH order, on a condition that a maximum transmission power level is determined to be exceeded by an expected transmission power level of the indicated PRACH transmission and an another scheduled transmission, the WTRU may determine to scale or drop an indicated PRACH transmission. On a condition that the indicated PRACH transmission is determined to be scaled, the WTRU may transmit the indicated PRACH transmission at a scaled power. The method further comprises monitoring the PCell for a RAR and in response to detecting an RAR associated with the PRACH transmission, adjusting a timing for the SCell based on a timing advance included in the RAR.
Public/Granted literature
- US20180077736A1 METHOD AND APPARATUS FOR OBTAINING UPLINK TIMING ALIGNMENT ON A SECONDARY CELL Public/Granted day:2018-03-15
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