InterDigital Inc (IDCC)

[Gamco]

United States Patent 9,854,608
Pelletier , et al. December 26, 2017

Method and apparatus for obtaining uplink timing alignment on a secondary cell


Abstract

A method for uplink timing alignment in a wireless transmit/receive unit is provided. The method includes receiving control signaling from an evolved Node B, receiving on a primary cell (PCell) a physical downlink control channel (PDCCH) order, the PDCCH order including a carrier indicator field indicating a secondary cell (SCell) to transmit a physical random access channel (PRACH) transmission. In response to the PDCCH order, transmitting the PRACH transmission, and in response to the PRACH transmission, monitoring the PCELL for a random access response (RAR). In response to detecting an RAR associated with the PRACH transmission, adjusting timing for the SCell in response to a timing advance included in the RAR.



Inventors:
Pelletier; Ghyslain (Laval, CA), Marinier; Paul (Brossard, CA), Shin; Sung-Hyuk (Northvale, NJ), Stern-Berkowitz; Janet A. (Little Neck, NY)

Applicant:


Name

City

State

Country

Type


InterDigital Patent Holdings, Inc.
Wilmington
DE
US


Assignee:
InterDigital Patent Holdings, Inc. (Wilmington, DE)


Family ID:
1000003031514

Appl. No.:
14/732,200

Filed:
June 5, 2015


Prior Publication Data






Document Identifier

Publication Date

US 20150271854 A1 Sep 24, 2015



Related U.S. Patent Documents









Application Number

Filing Date

Patent Number

Issue Date

13468709 May 10, 2012
61484591 May 10, 2011




Current U.S. Class: 1/1
Current CPC Class: H04W 74/0833 (20130101); H04W 74/0891 (20130101); H04W 56/0005 (20130101); H04W 56/0045 (20130101)
Current International Class: H04W 74/08 (20090101); H04W 56/00 (20090101)

PPP