Cisco ASR 5x00 Home eNodeB Administration Manual page 30

▀ Terminology
Services are configured within a context and enable certain functionality. The following services can be configured on
the system:
 HeNB-GW services: HeNB-GW services are configured in Context configuration mode to support both mobile-
initiated and network-requested user contexts. The HeNB-GW services must be bound to a logical interface
within the same context. There are two HeNB-GW services:
 HeNB-GW Access Service: This service is configured under the Context configuration mode in order
 HeNB-GW Network Service: This service is also configured in the Context configuration mode to
 Radio Network PLMN: The Radio Network PLMN is configured in HeNB-GW Access service to associate
PLMNs with HeNB-GW.
PLMN configuration is also required at the time of configuring Logical eNodeBs for the HeNB-GW Network
service.
 GTP-U services: GTP-U services are configured in Context configuration mode in pair of two services; one for
GTP-U tunnel support towards HeNB on S1 interface and another for GTP-U tunnel support towards the core
network on S1-U interface to communicate with the S-GW respectively. These two GTP-U services are called
Access GTP-U service and Network GTP-U service.
GTP-U service comes in picture specially when the S1-U Relay option is enabled. S1-U relay activation
actually allows the data to flow through the GTP-U tunnel via HeNB-GW, otherwise it directly travels from
HeNBs to S-GW.
When S1-U relay is enabled, the HeNB-GW Access service has to be associated with the Network GTP-U
service and Access GTP-U service. Also the HeNB-GW Access service has to be associated with the HeNB-
GW Network service.
▄ Cisco ASR 5x00 Home eNodeB Gateway Administration Guide
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to initialize the HeNB-GW functionality. The configuration of this service controls the functionality of
S1-MME interface from HeNB-GW to the HeNBs.
This service is bound to a local SCTP end-point address (IP address) to listen the incoming SCTP
associations from HeNBs.
support the HeNB-GW functionalities. The configuration of this service controls the functionality of
S1-MME interface from HeNB-GW to MME. One-to-one mapping is maintained between the HeNB-
GW Access service and HeNB-GW Network service.
It is the HeNB-GW Network service where enabling of logical eNodeBs is configured within the
HeNB-GW. The Logical eNodeB configuration can be used to support load balancing within a pool of
TAIs. Each Logical eNodeB can connect up to 8 MMEs from the MME pool and therefore 64
connections are possible to be established between HeNB-GW and MME.
Important:
GW Network service. Up to 8 logical eNodeBs can be configured per HeNB-GW Network
service.
Important:
S1-U Relay is disabled by default. Also when S1-U relay is enabled, both Access
and Network GTP-U services need to be in STARTED state for the HeNB-GW access service to be
STARTED.
At least one logical eNodeB configuration is required to start the HeNB-
Understanding the Service Operation