User's Manual

nano3G AP Installation Manual Installation Overview and Requirements
N3G_INST_300 v292_1.0 for N3G_2.92 © ip.access Limited 2012 Page 15
2.2.7 Closed Access with CSG Parameter Broadcast
This is the recommended approach for Closed Access.
A Closed Subscriber Group (CSG) identifies a cell to a UE in order for the UE to determine
whether or not it should attempt to use that cell according to a whitelist of CSG identifiers
stored by the UE. This is a 3GPP Release 9 capability, and may or may not be used by Rel
9 UEs.
In this scenario, the AP transmits CSG information and as a result, CSG-aware Release 9
UEs that do not have the AP in their CSG whitelists will ignore the AP. However, this is not
a full implementation of CSG-based access control.
Note: This assumes that the operator has mechanisms in place to update CSG-aware UEs that
need to use the APs.
All other UEs will attempt to access the AP, but only UEs that are in the whitelist will be
allowed access to the AP.
Use the following attribute settings:
Attribute Setting Notes
CSG Access Mode
(csgAccessMode)
Hybrid The AP also accepts UEs that do not
implement CSG.
Access Decision Mode
(accessDecisionMode)
CSG Lite The AP transmits the CSGIndicator, CSGID,
and HNBIdentifier (when available). This
prevents foreign CSG-capable UEs from
attempting to access the HNB.
This setting does not invoke CSG based
access control.
Non CSG UE Access Decision
(nonCsgUeAccessDecision)
Query Causes the AP to perform an IMSI challenge
to provide the AC with the IMSI (or IMEI for
emergency calls).
The AC checks the IMSI with the AAA service
in the NOS, which checks the IMSI whitelist
configured for the AP to determine whether or
not the AP is granted access.
Closed Subscriber Group
Identifier
(csgId)
0 to 134217727 This is the Closed Subscriber Group Identity.
This is broadcast in SIB3 when Access
Decision Mode is set to CSG Lite. The UE
may have a whitelist of CSGIDs, and may
also permit manual selection of CSGIDs via
the corresponding HNB Names.
HNB Name
(hnbName)
Text This is an optional name of up to 48
characters.
It is only broadcast (in SIB20) if it has a value
and when Access Decision Mode is set to
CSG Lite.
Together with the CSG ID, this can be used
to identify a CSG cell to a UE user.
Access Control List
(accessControlList)
List of IMSIs and
corresponding
phone numbers
This is provisioned against an AP but used by
the AAA service in the NOS.