Volume And Duration-Based Prepaid Accounting - Cisco ASR 5000 series Product Overview

ASN Gateway Overview

Volume and Duration-based Prepaid Accounting

Prepaid accounting is a licensed-enabled feature. The ASN Gateway supports both volume threshold and duration
threshold based prepaid accounting. Even though session-level accounting is performed for both volume and duration,
the number of bytes in a multi-flow session are applied to a duration-based configuration.
RADIUS attributes identify thresholds and quotas for both volume (number of bytes) and duration (length of session).
Supported Enhanced Features
All enhanced features described in this section require the appropriate feature license keys.
Lawful Intercept Enhancements
Lawful Intercept (LI) provides a mechanism for telecommunication service providers (TSPs) to assist Law Enforcement
Agencies (LEAs) in monitoring suspicious individuals (referred to as targets) for potential criminal activity. 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 Identification (MSID) number, their name, or their assigned IP
address.
It is not possible to provision an LI trigger on the ASN Gateway (Simple IP) or home agent (Mobile IP) with pseudo-
NAI identifiers, since the outer identity is concealed from the gateway. For this reason, if it is necessary to provision
triggers with the pseudo-NAI, the basic LI license (with AAA event detection) must be used.
Once the target has been identified the system, functioning as either an ASN Gateway (Simple IP) or home agent
(Mobile IP), serves as an access function (AF) and monitors new data sessions or sessions already in progress. While
monitoring, the system intercepts and duplicates session content and forwards it to a delivery function (DF) over an
extensible, proprietary interface. The DF delivers the intercepted content to one or more collection functions.
The WiMAX implementation of LI monitoring includes the following features:
Active triggers (using AAA assist for control plane event detection)
Event delivery (AF to DF) with ability to configure UDP/IP message acknowledgements
Intelligent Traffic Control
Intelligent Traffic Control (ITC) supports customizable policy definitions. The policies enforce and manage service
level agreements for a subscriber profile, thus enabling differentiated levels of services for native and roaming
subscribers.
ITC includes features such as traffic prioritization, for example, marking DiffServ codepoints to enable unique
treatments for the five WiMAX classes of service, queue redirection, and per-subscriber/per-flow traffic bandwidth
control. Traffic policing enables maximum rate-based services and tiered bandwidth charging models. ITC includes a
local policy engine that runs on an ASN Gateway in a Simple IP usage model, or as a home agent in a Mobile IP
application. You can configure ITC policies statically with Class-Maps to identify applications flows that use L3/L4 5-
tuple identifiers. You can then apply the resulting policy actions through policy maps and policy groups. The detection
and programming of the local policy engine can alternatively be triggered on network access at the ASN Gateway as it
retrieves QoS profiles for each authenticated user.
OL-22938-02
Supported Features ▀
Cisco ASR 5000 Series Product Overview ▄