Cisco ASR 5000 Series 3G Home NodeB Administration Manual page 61

Understanding the Service Operation
 CS Network: CS Network is a context independent configuration to define circuit switched networks. This
circuit switched network configuration provides parameters for one or more MSCs where CS-domain Iu-
connections shall be routed. In a typical deployment HNB-GW is connected to only one MSC.
CS network configured at the system level need to be associated with a Radio Network PLMN configured
within HNB-GW service with desired granularity; PLMN level or location-area in that PLMN.
 PS Network: PS Network is a context independent configuration to define packet switched networks. This
packet switched network configuration provides parameters for one or more SGSN where PS-domain Iu-
connections shall be routed. In a typical deployment HNB-GW is connected to only one SGSN.
PS network configured at the system level need to be associated with a Radio Network PLMN configured
within HNB-GW service with desired granularity.
 GTP-U services: GTP-U services are configured in Context configuration mode in pair of two services; one for
GTP-U tunnel support towards HNB on IuH interface and another for GTP-U tunnel support towards the core
network on IuPS interface to communicate with SGSN respectively.
The system supports multiple GTP-U interface connections over this service. Although this service can be
configured in any independent context, but for IuH interface it must be configured in the same context as HNB-
GW; i.e. source context.
Following figure illustrates the relationship between services, interfaces, and contexts within the HNB-GW system for
HNB access 3G UMTS networks.
Figure 9. Service, Interface, and Context Relationship Within the System
To AAA(s)
To HNB(s)
Context (Ctx.)
Interface
Service or
Configuration (Cfg.)
The source context used to service a subscriber session is the same as the context in which the HNB-GW service is
configured. Each HNB-GW service is bound to an IP address in a source context. The HNBs select which IP address to
use, typically by using DNS. Once a UE has established a bearer context with an HNB-GW, the HNBs continue to use
the same context as the subscriber anchored to that HNB-GW.
OL-25069-03
Source
Dest. Ctx .
Ctx .
Iu- CS
CS
Cfg.
AAA
Iu- Flex
SeGW Cfg.
.
Iu- PS
HNB - GW
PS
Service
Cfg.
Iu-Flex
Iuh
Gn
HNB-GW/SeGW
Configuration
Cisco ASR 5000 Series 3G Home NodeB Gateway Administration Guide ▄
To MSC(s)
To MSC(s)
To SGSN(s)
To SGSN(s)
To GGSN
Terminology ▀
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