Method and apparatus for implementing tracking area update and cell reselection in a long term evolution system
US8649291B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2007 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Jun 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W8/18
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.