Cisco ASR 5000 Series, Обзор продукта

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GGSN Support in GPRS/UMTS Wireless Data Services
Features and Functionality - Optional Enhanced Feature Software ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
3GPP TS 33.108 V9.0.0 (2009-09): 3rd Generation Partnership Project; Technical Specification Group Services
and System Aspects; 3G security; Handover interface for Lawful Interception (LI) (Release 9)
Technical Directive: Requirements for implementing statutory telecommunications interception measures (TR
TKÜ), Version 4.0
LEAs provide one or more TSPs with court orders or warrants requesting the monitoring of a particular target. The
target is identified by information such as their mobile station Integrated Services Digital Network (MSISDN) number,
or their International Mobile Subscriber Identification (IMSI) number.
Once the target has been identified, the system, functioning as either a GGSN or HA, serves as an Access Function (AF)
and performs monitoring for both new PDP contexts or PDP contexts that are already in progress. While monitoring, the
system intercepts and duplicates Content of Communication (CC) and/or Intercept Related Information (IRI) and
forwards it to a Delivery Function (DF) over an extensible, proprietary interface. Note that when a target establishes
multiple, simultaneous PDP contexts, the system intercepts CC and IRI for each of them. The DF, in turn, delivers the
intercepted content to one or more Collection Functions (CFs).
Lawful intercept supports TCP transport on node interfaces along with support for IPv6 address link between chassis
and LI server.
On ASR 5000 or higher platforms with StarOS version 9.0 or later, this feature enhanced to allow 20,000 LI targets to
be provisioned as well as monitored.
Caution:
This capacity improvement impacts performance over various network scenario and in order to reach
the full target of 20000 LI targets, it is required that the used platform have at least 12 active packet processing cards
installed.
Important:
For more information on this feature support, refer Lawful Intercept Configuration Guide .
Mobile IP Home and Foreign Agents
Consolidation of GGSN, HA and/or FA services on the same platform eliminates CapEx and OpEx requirements for
separate network elements and devices under management. Service integration also enables seamless mobility and inter-
technology roaming between 1xEV-DO and UMTS/W-CDMA/GPRS/EDGE radio access networks. This shared
configuration also enables common address pools to be applied across all service types. In addition, this combination of
collapsed services does not create dependencies for Mobile IP client software on the user access device and
consequently does not introduce additional requirements for Mobile IP signaling in the 3GPP radio access network.
This functionality provides the following benefits:
Timely release of Mobile IP resources at the FA and/or HA
Accurate accounting
Timely notification to mobile node of change in service
The system is capable of supporting both GGSN and Mobile IP functions on a single chassis. For Mobile IP
applications, the system can be configured to provide the function of a Gateway GPRS Support Node/Foreign Agent
(GGSNSN/FA) and/or a Home Agent (HA).
HA and FA components are defined by RFC 2002 in support of Mobile IP. Mobile IP provides a network-layer solution
that allows Mobile Nodes (MNs, i.e. mobile phones, wireless PDAs, and other mobile devices) to receive routed IP