Features And Functionality - Optional Enhanced Feature Software; Automatic Neighbor Relation (Anr) Support; Csg-Id Based Paging Optimization Support - Cisco ASR 5x00 Home eNodeB Administration Manual

HeNB Gateway in Wireless LTE Network
Features and Functionality - Optional Enhanced Feature
Software
This section describes the optional enhanced features and functions support with HeNB-GW service.
Important:
functionality with the HeNB-GW service.
This section describes following features:


Automatic Neighbor Relation (ANR) Support



CSG-ID Based Paging Optimization Support


License-based Control for No. of HeNB Connections

License-based Control for No. of Subscribers Allowed
Automatic Neighbor Relation (ANR) Support
Automatic Neighbour Relation (ANR) functionality is nothing but relieving the operator from the complexity of
manually managing Neighbor Relations (NRs). In LTE deployments, the manual management of NRs becomes even
more challenging, as in addition of defining intra LTE neighbour relations for eNodeBs, operator has to provision
neighboring 2G, 3G, CDMA2000 cells as well.
The ANR function resides in the eNodeB and manages the conceptual Neighbour Relation Table (NRT). Located within
ANR, the Neighbour Detection Function (NDF) finds new neighbours and adds them to the NRT. ANR also contains
the Neighbour Removal Function (NRF) which removes outdated NRs. The NDF and the NRF functions are specific to
the implementation by operator.
An existing Neighbour cell Relation (NR) from a source cell to a target cell means that eNodeB controlling the source
cell knows the ECGI/CGI and Physical Cell Identifier (PCI) of the target cell and has an entry in the NRT for the source
cell identifying the target cell.
For each cell that the eNodeB has, the eNodeB keeps an NRT. For each NR, the NRT contains the Target Cell Identifier
(TCI), which identifies the target cell. For E-UTRAN, the TCI corresponds to the E-UTRAN Cell Global Identifier
(ECGI) and Physical Cell Identifier (PCI) of the target cell.
The ANR function relies on cells broadcasting their identity on global level, ECGI and allows O&M to manage the
NRT
CSG-ID Based Paging Optimization Support
Due to the high volume and small-sized femtocell deployment, it is well-known that paging messages is a big burden for
the femtocell system.In order to optimize the paging procedure by the HeNB-GW, the HeNB-GW is made aware of the
CSGs supported by the connected HeNBs. This allows the HeNB-GW to identify the appropriate HeNBs supporting
certain CSGs. This is known through the S1-Setup request sent by HeNBs.
In order to have a complete paging optimization solution, the allowed CSG list of the paged UE is included in the
paging message. The paging message is then sent with the allowed CSG list of the paged UE to the HeNB-GW by
MME.
Some of the following features may require the purchase of an additional license to implement the
Features and Functionality - Optional Enhanced Feature Software ▀
Cisco ASR 5x00 Home eNodeB Gateway Administration Guide ▄
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