Wireless Oom » ura http://wireless.pyncus.com Build and Share wireless technology Wed, 01 Feb 2012 15:38:03 +0000 http://wordpress.org/?v=2.8.4 en hourly 1 What for SIB 2? http://wireless.pyncus.com/2009/07/26/what-for-sib-2/ http://wireless.pyncus.com/2009/07/26/what-for-sib-2/#comments Sun, 26 Jul 2009 19:26:19 +0000 wirelessoom http://wirelessoom.wordpress.com/?p=414 SIB 2

contains information on the available URAs. There can be up to eight URAs in a cell.

]]> http://wireless.pyncus.com/2009/07/26/what-for-sib-2/feed/ 0 Area identifier http://wireless.pyncus.com/2009/07/26/area-identifier/ http://wireless.pyncus.com/2009/07/26/area-identifier/#comments Sun, 26 Jul 2009 15:46:47 +0000 wirelessoom http://wirelessoom.wordpress.com/?p=378 LAI: Location Area Identifier: PLMN id + LAC(location area code) = 24+16=40 bits

RAI: Routing Area Identifier:LAI + RAC (routing area code) =40+8 = 48 bits

URA: UTRAN Routing Area: URA = 16 bits

UTRAN cell id: UC id= RNC id + cell id = 12+16 = 28 bits

]]> http://wireless.pyncus.com/2009/07/26/area-identifier/feed/ 0 LA vs. RA vs. URA http://wireless.pyncus.com/2009/07/26/la-vs-ra-vs-ura/ http://wireless.pyncus.com/2009/07/26/la-vs-ra-vs-ura/#comments Sun, 26 Jul 2009 15:43:28 +0000 wirelessoom http://wirelessoom.wordpress.com/?p=376 LA: location area

RA: routing area

URA: UTRAN routing area

The aboves are the collections of cells.

LA and RA are for CN to track the movement of the UE to facilitate the paging of the mobile when an active radio connection is not available.

A cell can be in up to eight different URAs.

URA size depends on the UE’s velocity. Fasting moving UEs should be in a large URA to make less URA update.

]]> http://wireless.pyncus.com/2009/07/26/la-vs-ra-vs-ura/feed/ 0 Describe the location management in UMTS http://wireless.pyncus.com/2009/06/24/describe-the-location-management/ http://wireless.pyncus.com/2009/06/24/describe-the-location-management/#comments Wed, 24 Jun 2009 06:58:09 +0000 wirelessoom http://wirelessoom.wordpress.com/?p=291 lm

*Idle mode: CN-level

UE is identified with TMSI (temporary mobile subscriber identity)

*RRC connected mode: UTRAN-level

UE is identified with C-RNTI and U-RNTI

Cell_FACH and Cell_PCH: every cell change needs to be reported via cell update

URA_PCH: every URA change needs to be reported via cell update

(less signal overhead from UE perspective, but more paging messages need to be injected into multiple cells)

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