Replies to post #416055 on InterDigital Inc (IDCC)

[Gamco]

United States Patent 9,603,048
Pelletier , et al. March 21, 2017

Random access procedures in wireless systems


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 (Laval, CA), Ahmad; Saad (Montreal, CA)

Applicant:


Name

City

State

Country

Type


InterDigital Patent Holdings, Inc.
Wilmington
DE
US


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


Family ID:
1000002474406

Appl. No.:
13/838,231

Filed:
March 15, 2013


Prior Publication Data






Document Identifier

Publication Date

US 20130242730 A1 Sep 19, 2013



Related U.S. Patent Documents









Application Number

Filing Date

Patent Number

Issue Date

61611836 Mar 16, 2012
61644562 May 9, 2012
61678387 Aug 1, 2012




Current U.S. Class: 1/1
Current CPC Class: H04W 28/0284 (20130101); H04L 1/0046 (20130101); H04L 1/0072 (20130101); H04W 74/0833 (20130101)
Current International Class: H04W 74/00 (20090101); H04W 28/02 (20090101); H04W 74/08 (20090101); H04L 1/00 (20060101)
Field of Search: ;370/252,230,254,328-329,315,342 ;455/404.1,450,455

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