Bindings; Services And Networks - Cisco ASR 5x00 Home eNodeB Administration Manual

Understanding the Service Operation
The Stream Control Transmission Protocol (SCTP) guarantees the delivery of signalling messages between
MME and eNodeB via HeNB-GW.
 S1-U: This interface is the reference point between E-UTRAN and Serving Gateway (S-GW). This interface is
responsible for the per bearer user plane tunnelling and inter eNodeB path switching during handover.
The HeNB-GW functions as a user-plane concentrator along with the control-plane concentration function.
This allows the S-GW to view the cluster of femtocells as a single entity. The user-plane aggregation
functionality provides support for both GTP-U and PMIP traffic.
One or more IuPS interfaces can be configured per system context.
 RADIUS: This interface is the reference point between a Security Gateway (SeGW) and a 3GPP AAA Server or
3GPP AAA proxy (OCS/CGF/AAA/HSS) over RADIUS protocol for AAA procedures for Femto user.
In the roaming case, the 3GPP AAA Proxy can act as a stateful proxy between the SeGW and 3GPP AAA
Server.
The AAA server is responsible for transfer of subscription and authentication data for
authenticating/authorizing user access and UE authentication. The SeGW communicates with the AAA on the
PLMN using DIAMETER protocol.
One or more RADIUS interfaces can be configured per system context.
 TR-069: This interface is an application layer protocol which is used for remote configuration of terminal
devices, such as DSL modems, HeNBs and STBs. TR-069 provides an auto configuration mechanism between
the HeNB and a remote node in the service provider network termed the Auto Configuration Server. The
standard also uses a combination of security measures including IKEv2 (Internet Key Exchange v2) and IPsec
(IP Security) protocols to authenticate the operator and subscriber and then guarantee the privacy of the data
exchanged.
One TR-069 interface can be configured per HeNB node.

Bindings

A binding is an association between "elements" within the system. There are two types of bindings: static and dynamic.
Static binding is accomplished through the configuration of the system. Static bindings are used to associate:
 A specific logical interface (configured within a particular context) to a physical port. Once the interface is
bound to the physical port, traffic can flow through the context just as if it were any physically defined circuit.
Static bindings support any encapsulation method over any interface and port type.
 A service to an IP address assigned to a logical interface within the same context. This allows the interface to
take on the characteristics (i.e., support the protocols) required by the service. For example, a GTP-U service
bound to a logical interface will cause the logical interface to take on the characteristics of a GTP interface
within an LTE Femtocell network.
Dynamic binding associates a subscriber to a specific egress context based on the configuration of their profile or
system parameters. This provides a higher degree of deployment flexibility as it allows a wireless carrier to support
multiple services and facilitates seamless connections to multiple networks.

Services and Networks

This section describes the services configured on HeNB-GW to support various functionality.
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