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)
PPP