The Diameter protocol is comprised of two basic parts: the Diameter Base Protocol and
Diameter applications.
The base protocol provides reliable transport of Diameter data units, negotiating
capabilities, handling errors, and the ability to extend functionality. It defines the
basic Diameter message format. A Diameter application defines application-specific
functions and data units. Each Diameter application is specified separately. This design
allows the protocol to be extended to new access technologies.
The base protocol must be used in conjunction with a Diameter application. Each
application relies on the base protocol to support a specific type of network access.
MATRIXX Engine support is extensible and currently includes the following Diameter
applications:
Common
Accounting
Credit-Control
NASREQ
Policy-Control
Each application defines request and response messages that are communicated between a Diameter
client and MATRIXX Engine. Diameter Interface support is extensible and currently includes the Diameter
Interfaces described in Table 1. Currently, MATRIXX supports 3GPP Release 15.
Table 1. Supported Diameter Standards
Reference Point
Supported Standards
Client
Server
Description
3GPP 32.240
Charging Architecture and Principles.
RFC 3588
RFC 6733
Diameter Base Protocol.
RFC 4006
Diameter Credit Control Application.
3GPP 32.296
Online Charging Application and Interfaces.
Gy / Ro
3GPP 32.299
Diameter Charging Applications.
Gy / Ro
3GPP 32.251
PCEF
MATRIXX Digital Commerce
Packet Switched Domain Charging use cases and sequence of
events.
Gx
3GPP 29.212
PCEF
MATRIXX Digital Commerce (Policy Control)
Policy and Charging Control rule installation, modification and
deletion.
Sy
3GPP 29.219
PCRF
MATRIXX Digital Commerce
Exchange of Policy Counter information from MATRIXX Digital Commerce to a third-party PCRF.
Sp over Sh
3GPP 29.329
PCRF
MATRIXX Digital Commerce
MATRIXX Digital Commerce acts as SPR/UDR for a third-party PCRF. Supports SNR, SNA, PNR,
PNA operations.
Ro
3GPP 32.260
AS
MATRIXX Digital Commerce
IMS Domain Charging use cases and sequence of events.
Ro
3GPP 32.275
MMTel-AS
MATRIXX Digital Commerce
MMTel Domain Charging use cases and sequence of events.
Ro
3GPP 32.281
AS
MATRIXX Digital Commerce
Supported AVP for announcements
Rx
3GPP 29.214
P-CSCF / AF
MATRIXX Digital Commerce (Policy Control)
Dynamic policy rules built based on information received over Rx
interface
Rx / Gx
3GPP 29.213
MTX (Policy Control)
PCEF
Used to compute QoS information within dynamic policy rules
installed over Gx from information received over Rx.
Ro
3GPP 32.276
gsmSCF
MATRIXX Digital Commerce
Voice calling charging from voice proxy function to OCS.
Ro
3GPP 32.270
SMSC
MATRIXX Digital Commerce
SMS Charging use cases and sequence of events.
Ro
3GPP 32.274
MMSC
MATRIXX Digital Commerce
MMS Charging use cases and sequence of events.
Sh
3GPP 29.328
MATRIXX Digital Commerce
HSS
MATRIXX Digital Commerce can query HSS for subscriber information (such as last known
location) for rating purposes.
Figure 1 shows the relationship between the Diameter Interfaces
and MATRIXX Engine. Figure 1. Diameter Interfaces
