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MATRIXX 5G Event Streaming
Content-Based CDR Routing
The CDR Kafka router republishes each _glossary/cdr.html based on its content, either as received or enriched with additional data on a conditional basis.

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MATRIXX 5G Event Streaming
- About MATRIXX 5G Event Streaming
  MATRIXX 5G Event Streaming describes how to aggregate and stream charging data records (CDRs) from the SBA Gateway to an sFTP server using a Kafka broker.
- 5G Event Streaming Overview
  SBA Gateway can stream HTTP requests and MATRIXX Engine HTTP responses to a Kafka broker. The 5G event streaming applications convert the received JSON objects to ASN.1 binary format for export to Kafka applications and can optionally aggregate and route based on content. The GTP Prime Adapter microservice is provided for sending records from Kafka to a GPRS Tunneling Protocol (GTP) server.
- Converting CDRs to ASN.1 Format
  Charging data records (CDRs) are processed by the CDR ASN.1 Streamer Kafka client application to convert them from JSON into ASN.1 objects. After the ASN.1 objects are serialized as a binary message using Basic Encoding Rules (BER), they are placed in another Kafka topic for further processing. The ASN.1 sFTP Sink application then writes the message to file before transferring it over Secure FTP (sFTP).
- sFTP Sink Microservice Deployment
- ASN.1 Record Naming and Counting
  Each time the ASN.1 sFTP Sink application receives a batch of records, if the number of records is greater than or equal to the configured closure condition, the aggregated ASN.1 record is generated. Otherwise, the batch is held for the next ASN.1 record.
- CDR Aggregation Function
  Every request received by SBA Gateway from the SMF results in the creation of a 5G event, also known as a network _glossary/cdr.html. To avoid sending excessive records to a downstream system, CDRs must be aggregated on a per session basis so that only summary level CDRs are sent to third-party CGF or the BSS domain. The CDR Aggregation Function (CAF) application is a Kafka Streams application that aggregates network interactions handled by SBA Gateway on the 5G N40 interface.
- Content-Based CDR Routing
  The CDR Kafka router republishes each _glossary/cdr.html based on its content, either as received or enriched with additional data on a conditional basis.
  - Application Settings
    5g_integration/c_cdr_routing_app_settings.html#concept_uqg_pqt_gyb__table_krk_yr5_gyb describes application settings for CDR Kafka router. For descriptions of all the available parameters (including these), see the discussion about configuring CDR Kafka router.
  - CDR Enrichment
    JSON data can be merged in to the record when a JSON path matches a value. The value itself can be a regular expression.
  - Topic Routing
    Routing is based on a logical predicate that matches JSON paths with regular expressions, similar to enrichment, but more expressive.
- Write To Disk
  When Kafka is unavailable, the producer continues attempting to send to the Kafka broker until a timeout is reached. On timeout, the records are written to a separate log file on disk.
- Record Formats and Schemas
  Request and response records are sent in JSON format.
- Kafka Partition Key
  The Kafka partition key used is the SessionId for the exchange. If none is available, for example if there is an error returned by the engine, then no partition key is used.
- Installing 5G Event Streaming Applications
  The 5G event streaming applications are delivered as images for container creation in a Kubernetes cluster using a Helm chart. The following sections describe the installation process. The procedures assume you have knowledge of and access to the kubectl tool.
- Configuring 5G Event Streaming
  Configure 5G event streaming by providing values for properties in one or more Helm values files.
- Configuring the Applications
  The 5G event streaming applications are configured in the Helm values file, the nf.yaml file, and an application.yaml files for each application.
- Applying Configuration
  You can apply configuration for 5G event streaming applications in several ways using the Helm values chart. These methods are not mutually exclusive and can be used together.
- Appendixes
MATRIXX Event Streaming
MATRIXX Administration
MATRIXX Web App Administration
MATRIXX Monitoring and Logging
MATRIXX Policy
MATRIXX Kafka CDR Consumer
MATRIXX Pricing and Rating
MATRIXX Pay Now
MATRIXX Subscriber Management
MATRIXX Subscriber Management API
MATRIXX Business API SDK
My MATRIXX Help
MATRIXX Backoffice Customer Tool Help
MATRIXX Third-Party Licenses
Glossary

Content-Based CDR Routing

The CDR Kafka router republishes each charging data record (CDR) based on its content, either as received or enriched with additional data on a conditional basis.

The router sends records to output topics based on the content of each record received on the inbound topic. The choice of outbound topic is determined by a logical predicate that matches a JSON path to a value in the record. The record can also be enriched with data based on matching content in the record. As the enrichment occurs before the outbound topic is decided, this added data can be used in the predicate.

Figure 1 shows the flow of records through the CDR Kafka router.