User's Manual

Table Of Contents
Overview
c02.fm
Einleitung
A31003-C1010-S100-2-7620, 08/2010
20 HiPath Cordless IP, Service Manual
Function: Configuration and administration interface
All administrative functionality for the DECT IP Basestations as well as for HiPath
Cordless IP Server SW itself is performed via a Web Based Management to the
HiPath Cordless IP Server SW, i.e., all DECT IP Basestations are administered
via HiPath Cordless IP Server SW.
Function: Synchronization management
DECT IP base stations must be perfectly synchronized as a prerequisite for
seamless handover. If the DECT IP base stations are synchronized, they
combine to form a seamless handover cluster. The synchronization management
function only works in this cluster. Additional clusters are possible but not
synchronized. Seamless handover is not possible between different
asynchronous clusters.
In DECT systems with line-switched connections such as HiPath Cordless
systems, the synchronization information needed for synchronizing the DECT IP
base stations is obtained from the UP0 connection. This is not possible in the
HiPath Cordless IP system.
DECT-based synchronization ("synchronization over the air")
This method to synchronize overlapping radio cells runs under SW control
within the DECT part of the DECT IP Basestation. The HiPath Cordless IP
Server SW is acting only as admin point that notices when a base station has
lost its synchronization.
The DECT IP base station must be located in the overlap area of the DECT
IP base station that it wants to synchronize with over the DECT interface. For
every DECT IP Basestation the synchronization "Master" have to be
configured by the configuration Interface of the HiPath Cordless IP Server
SW. DECT information for synchronization are exchanged directly between
the DECT IP Basestations.
A DECT IP base station can also be synchronized with other DECT IP base
stations as this increases the synchronism available in the cluster. It is
important to avoid synchronization loops.
In the event of loss of synchronization, the DECT IP base station stops
accepting calls once all ongoing calls that were being conducted on the
asynchronous DECT IP base station have ended and then it re-synchronizes
the asynchronous DECT IP base station.