InterDigital Inc (IDCC)

[Gamco]

United States Patent 9,860,817
Wang , et al. January 2, 2018

Method and apparatus for implementing tracking area update and cell reselection in a long term evolution system


Abstract

The invention performs long term evolution (LTE) tracking area updates (TAUs), and tracking area code (TAC) and public land mobile network identification (PLMN-ID) assisted optimized wireless transmit/receive unit (WTRU) cell reselection. An evolved Node-B broadcasts system information including at least one system information block (SIB) based at least in part on an enhanced universal terrestrial radio access network (E-UTRAN) parameter response message sent by an evolved packet core (EPC) network. A WTRU generates a new TAC, which represents a tracking area identification (TA-ID) of a new cell, based on the system information, and compares the new TAC to an existing TAC, which represents a TA-ID of a previous cell. The WTRU transmits to the EPC network a TAU request message including the TA-ID of the new cell. The EPC network sends either a TAU accept message or a TAU reject message to the WTRU.



Inventors:
Wang; Peter S. (E. Setauket, NY), Miller; James M. (Verona, NJ), Olvera-Hernandez; Ulises (Kirkland, CA)

Applicant:


Name

City

State

Country

Type


INTERDIGITAL TECHNOLOGY CORPORATION
Wilmington
DE
US


Assignee:
InterDigital Technology Corporation (Wilmington, DE)


Family ID:
1000003042866

Appl. No.:
14/100,891

Filed:
December 9, 2013


Prior Publication Data






Document Identifier

Publication Date

US 20140092871 A1 Apr 3, 2014



Related U.S. Patent Documents









Application Number

Filing Date

Patent Number

Issue Date

11923033 Oct 24, 2007 8649291
60863528 Oct 30, 2006




Current U.S. Class: 1/1
Current CPC Class: H04W 36/34 (20130101); H04W 60/04 (20130101); H04W 8/18 (20130101)
Current International Class: H04W 36/34 (20090101); H04W 60/04 (20090101); H04W 8/18 (20090101)

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