United States Patent 9,788,286
Pelletier , et al. October 10, 2017
Method and apparatus for radio link synchronization and power control in CELL.sub.--FACH and idle mode
Abstract
A method and apparatus for radio link synchronization and power control in CELL_FACH state and idle mode are disclosed. A wireless transmit/receive unit (WTRU) transmits a random access channel (RACH) preamble and receives an acquisition indicator acknowledging the RACH preamble via an acquisition indicator channel (AICH) and an index to an enhanced dedicated channel (E-DCH) resource. The WTRU determines a start of an E-DCH frame. An F-DPCH timing offset is defined with respect to one of the RACH access slot and an AICH access slot carrying the acquisition indicator. A relative F-DPCH timing offset may be signaled to the WTRU and the WTRU may determine a start of an E-DCH frame based on the relative F-DPCH timing offset and timing of an AICH access slot including the acquisition indicator. The WTRU may transmit a dedicated physical control channel (DPCCH) power control preamble before starting an E-DCH transmission.
Inventors:
Pelletier; Benoit (Montreal, CA), Marinier; Paul (Montreal, CA), Cave; Christopher R. (Montreal, CA), Kim; In H. (Norristown, PA), Di Girolamo; Rocco (Montreal, CA)
Applicant:
Name
City
State
Country
Type
InterDigital Patent Holdings, Inc.
Wilmington
DE
US
Assignee:
InterDigital Patent Holdings, Inc. (Wilmington, DE)
Family ID:
1000002881818
Appl. No.:
15/417,619
Filed:
January 27, 2017
Prior Publication Data
Document Identifier
Publication Date
US 20170142669 A1 May 18, 2017
Related U.S. Patent Documents
Application Number
Filing Date
Patent Number
Issue Date
15076099 Mar 21, 2016 9560607
14714763 Mar 22, 2016 9295013
14090643 May 19, 2015 9036617
12346617 Dec 24, 2013 8615002
61025695 Feb 1, 2008
61018059 Dec 31, 2007
Current U.S. Class: 1/1
Current CPC Class: H04W 52/38 (20130101); H04W 74/08 (20130101); H04W 56/0045 (20130101); H04W 56/0005 (20130101)
Current International Class: H04W 52/38 (20090101); H04W 74/08 (20090101); H04W 56/00 (20090101)
PPP
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