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Tuesday, May 22, 2018 9:49:51 AM
Pelletier , et al. May 22, 2018
Random access procedures in wireless system
Abstract
A wireless transmit/receive unit (WTRU) may detect cell congestion by selecting a preamble type as a function of priority level, transmitting the preamble to a serving cell, receiving a random access response (RAR) from the serving cell, determining a congestion state of the serving cell as a function of the received RAR, and/or responding to the congestion state of the serving cell. RACH functionality may be improved by allocating one or more sets of Physical RACH (PRACH) resources to a WTRU. The WTRU may configure the additional PRACH resources based on the allocation. A WTRU may determine a second set of PRACH resources based at least in part on a first set of PRACH resources. A WTRU may determine additional sets of PRACH preambles and may utilize modified PRACH preambles and/or modified PRACH preamble formats. The WTRU may signal additional PRACH resources.
Inventors:
Pelletier; Ghyslain (Montreal, CA), Ahmad; Saad (Montreal, CA)
Applicant:
Name
City
State
Country
Type
INTERDIGITAL PATENT HOLDINGS, INC.
Wilmington
N/A
DE
Assignee:
InterDigital Patent Holdings, Inc. (Wilmington, DE)
Family ID:
1000003308343
Appl. No.:
15/410,979
Filed:
January 20, 2017
Prior Publication Data
Document Identifier
Publication Date
US 20170135135 A1 May 11, 2017
Related U.S. Patent Documents
Application Number
Filing Date
Patent Number
Issue Date
13838231 Mar 15, 2013 9603048
61611836 Mar 16, 2012
61644562 May 9, 2012
61678387 Aug 1, 2012
Current U.S. Class: 1/1
Current CPC Class: H04L 5/005 (20130101); H04W 74/0833 (20130101)
Current International Class: H04W 74/08 (20090101); H04L 5/00 (20060101)
PPP
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