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MATRIXX 5G Integration
Charging Function
This section describes the Charging Function components and how to deploy and configure them.
CHF Proxy
CHF Proxy is a MATRIXX component that routes PCF/SMF 5G network traffic to 5G charging interfaces.
Configuring CHF Proxy
After initial deployment of CHF Proxy, you can customize the configuration.
Application-Specific Properties
CHF Proxy accepts 5G network traffic and can route it to a pre-configured Charging Function (CHF) implementation using basic routing rules and values extracted from the messages. After initial deployment of CHF Proxy, you can further customize the application configuration.
Client-Side Load Balancer Properties
5g_integration/r_chf_proxy_properties_lb.html#reference_p2g_5b2_1dc__table_w5w_fc2_1dc describes the properties available for configuring the client-side load balancer in CHF Proxy:

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MATRIXX 5G Integration
- About MATRIXX 5G Integration
  MATRIXX 5G Integration describes how to implement the Service-Based Architecture (SBA) Gateway and messaging. In addition, this document provides information about security configuration (secured and not secured).
- MATRIXX SBA Gateway
  This section describes the Service Based Architecture (SBA) Gateway, which provides the framework to build 5G network function (NF) services based on 3GPP technical specifications.
- Charging Function
  This section describes the Charging Function components and how to deploy and configure them.
  - CHF Standalone
    CHF Standalone is an SBA Gateway implementation of the Charging Function (CHF) Network Function that uses only Backstop Processing to respond to all messages. CHF Standalone can be used to deploy and configure multiple Charging Function components, including:
  - CHF Diameter Adapter
    CHF Diameter Adapter is a MATRIXX component that converts 5G Charging Function (CHF) interface messages to 4G Diameter messages and then sends the Diameter messages to a third-party online charging system.
  - NRF Client
    NRF Client updates an external NRF on the availability of an NF service. This mirrors the default behavior of SBA Gateway. NRF Client uses the Kubernetes API to find the running pods of the NF service and queries their metrics to discover the current CPU capacity and CPU load. The total CPU capacity and average CPU load are then reported back to the NRF by updating the nfProfile it holds for the service.
  - CHF Proxy
    CHF Proxy is a MATRIXX component that routes PCF/SMF 5G network traffic to 5G charging interfaces.
    - Installing CHF Proxy
      Before installing CHF Proxy, see the discussion about installing cloud native MATRIXX in MATRIXX Installation and Upgrade.
    - Configuring CHF Proxy
      After initial deployment of CHF Proxy, you can customize the configuration.
      - Application-Specific Properties
        CHF Proxy accepts 5G network traffic and can route it to a pre-configured Charging Function (CHF) implementation using basic routing rules and values extracted from the messages. After initial deployment of CHF Proxy, you can further customize the application configuration.
        Scaling Properties
        You can configure how many instances of the Vert.x event loop are used.
        HTTP and HTTP/2 Properties
        5g_integration/r_chf_proxy_properties.http.html#reference_shw_fy5_hyb__table_hvb_mcm_gyb describes the properties available for configuring CHF Proxy for HTTP and HTTP2:
        Client-Side Load Balancer Properties
        5g_integration/r_chf_proxy_properties_lb.html#reference_p2g_5b2_1dc__table_w5w_fc2_1dc describes the properties available for configuring the client-side load balancer in CHF Proxy:
        Shutdown Properties
        5g_integration/r_chf_proxy_properties_shutdown.html#reference_xnr_jrx_xcc__table_qhy_dsx_xcc describes the properties available for configuring the CHF Proxy shutdown sequence:
        Base URL Properties
        5g_integration/r_chf_proxy_properties_baseurl.html#reference_h4d_tbv_hyb__table_hvb_mcm_gyb describes how to set the base part of the URL of CHF Proxy:
        Routing Properties
        You can configure the routes that define the URLs that CHF Proxy exposes and the rules for selecting the URL endpoints.
        Endpoint Properties
        The endpoint configuration defines a Charging Function (CHF) to which incoming messages can be sent.
        Tracing Properties
        5g_integration/r_chf_proxy_properites_tracing.html#reference_sh3_gvx_xcc__table_mbx_hvx_xcc describes the properties available for configuring CHF Proxy Open Telemetry tracing:
        Configuration Example
        The following is an example configuration that provides routing to two CHF instances based on _glossary/supi.html values:
  - Common Component Configuration Properties
    This section describes properties in the MATRIXX common helm chart for CHF Standalone, CHF Diameter Adapter, NRF Client, and CHF Proxy.
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Glossary

Client-Side Load Balancer Properties

Client-Side Load Balancer Configuration Properties describes the properties available for configuring the client-side load balancer in CHF Proxy:

Table 1. Client-Side Load Balancer Configuration Properties
Property	Description
clientSideLoadBalance.enabled	When set to `true`, client-side load balancing is used for endpoints. The default value is `true`.
clientSideLoadBalance.cacheCheckIntervalInSeconds	The number of seconds between each check of the cached DNS results where expired entries are refreshed and stale entries are removed. The default value is 30.
clientSideLoadBalance.resolvedAddressExpiryInSeconds	The number of seconds until a cached DNS result is considered expired and re-queried. The default value is 30.
clientSideLoadBalance.stopQueryingHostAfterSeconds	The number of seconds after the last request to an endpoint host until automatic querying of the DNS for the underlying IP addresses is stopped. The default value is 300.