Specifications

Location Handover
Handover
August 08, 2000 68P81095E55-E D-3
Location Request
Control
The Location Request Control procedure is used to avoid the unnecessary use of
channel resources and unnecessary control messages. reporting location changes is
primarily the responsibility of the MS. While in range and active, the MS will
update the location area in the FNE VLRs.
If the MS exists on the system and is not found in the last know location it may be in
partnered systems, the FNE monitors activity of the MS to detect when this has
likely to have occurred. When the FNE has determined that the MS may no longer be
in its last reported location, the FNE precedes further calls with a Location Request.
A channel is only allocated when at least one target MS present on the site.
The FNE will stop sending Location Requests (control message traffic) after a long
period of inactivity. This timer is matched to an MS timer which requires the MS to
report its location periodically (i.e. at least once a day).
Home Neighbor
Network Search
In cases where a user’s operating area(s) are covered by more than one iDEN
networks or roaming partner network, the preferred system is the home system.
Home Neighbor Network Search (HNNS) is used to define and prioritized the home
system as the primary serving system
Currently, an iDEN system will only support dispatch services while outside their
own network when both networks are using Software Release 8.0 and roaming
agreements exists.
When networks overlap, users prefer to re-attach to their home network for dispatch
services as quickly as possible. HNNS allows movement between networks with a
return to the home network for dispatch services as soon as coverage is available.
This is only available on i600 Galaxy (or newer) Mobile Stations with HNNS
compatible subscriber code(s). This is accomplished by a reselect in Radio Link
control.
Each cell in an overlap area may contain one or more cells of another dispatch
network in the neighbor cell list (home network neighbors). If the candidate cell’s
Regional Network Code (RNC) matches the home RNC on the user’s mobile, the
mobile will reselect to the cell in the “home system” and dispatch service will be
restored.
Location Handover
All functional operations of the iDEN system locate the mobile station (MS) by
analyzing the radio link integrity. When a mobile is powered-ON it receives signals
from all EBTSs in range. It also transmits a Request for Service. The MS and the
EBTSs in range monitor and analyze the radio link. All EBTSs in range form a
location identifier that is sent to VLRs in the MSC and the DAP.