What's New in This Guide

This section introduces the documentation updates for release 26.1.2xx.

Release 26.1.201 - G55574-01, August 2026

Feature Updates:
- New Features:
  - Diameter Gateway Connection Repaving
    - Added Diameter Gateway Connection Repaving to describe the Diameter Gateway Connection Repaving feature that provides a controlled mechanism to re-balance Diameter connections across the cluster without restarting services or causing a complete outage.
    - Added Diameter Repaving to describe Diameter Gateway connection repaving configuration.
    - Added the following advanced settings keys to Settings:
      - DGW_CONNECTION_REPAVING.MAX_STAGGER_JITTER_MS
      - DGW_CONNECTION_REPAVING.REINVOCATION_DELAY_MIN
      - DGW_CONNECTION_REPAVING.CONNECTION_DISCONNECT_INTERVAL_MS
      - DGW_CONNECTION_REPAVING.DPR_DELAY_MS
      - DGW_CONNECTION_REPAVING.DPR_DISCONNECT_CAUSE
    - Added diam_repaving_disconnections_total metric to Diameter Gateway Metrics that counts the total number of connections terminated by the "force disconnect" mechanism.
  - Support for QoS Monitoring
    - Added Support for QoS Monitoring to describe how Policy supports AF subscription to QoS Monitoring and notifies provides report to the AF about packet delay between the UPF and RAN.
    - Updated description of Override Supported Features field in PCF Session Management to mention support for QoSMonitoring.
    - Added QosMon Notification Target to PCF Session Management, which is used to configure QoS Monitoring functionality in SM service.
    - Updated description of Override Supported Features field in PCF Policy Authorization to mention support for QoSMonitoring and EnhancedSubscriptionToNotification.
    - Added the following fields to PCF Policy Authorization, which are used to configure QoS Monitoring in PA service:
      - Accept Request on Missing QoS Monitoring Attributes
      - Accept Request on QoS Monitoring Not Supported/Not Negotiated
    - Added the following metrics to PA Service Metrics:
      
      occnp_pa_qosmon_request_total
      
      occnp_pa_qosmon_response_total
    - Added the following metrics to SM Service Metrics:
      - occnp_sm_qosmon_update_notify_sent_total
      - occnp_sm_qosmon_decs_error_total
    - Added the following alerts to PCF Alerts:
      
      QOS_MON_FAILED_AUTH_ABOVE_MINOR_PERCENT
      
      QOS_MON_FAILED_AUTH_ABOVE_MAJOR_PERCENT
      
      QOS_MON_FAILED_AUTH_ABOVE_CRITICAL_PERCENT
      
      QOS_MON_SMF_POLICY_FAILURE_CODE_ABOVE_MINOR_PERCENT
      
      QOS_MON_SMF_POLICY_FAILURE_CODE_ABOVE_MAJOR_PERCENT
      
      QOS_MON_SMF_POLICY_FAILURE_CODE_ABOVE_CRITICAL_PERCENT
      
      QOS_MON_MISSING_ATTRIBUTES_ABOVE_MINOR_PERCENT
      
      QOS_MON_MISSING_ATTRIBUTES_ABOVE_MAJOR_PERCENT
      
      QOS_MON_MISSING_ATTRIBUTES_ABOVE_CRITICAL_PERCENT
  - Support for 3GPP-SBI-Message-Priority Support
    - Added Support for SBI Message Priority Header to describe how Policy supports assigning priority to messages using 3GPP-SBI-Message-Priority header.
    - Updated the description of Interface Type and Message Type fields in Message Profiles.
    - Added Message Priority Profile to PCF Session Management.
    - Added Message Priority Profile for UDR Connector and CHF Connector in PCF User Connector.
    - Added Message Priority Profile to Binding Service.
    - Added the following metrics to Common Metrics:
      - occnp_http_message_priority_request_count_total
      - occnp_http_message_priority_response_count_total
  - Support for 3gpp-Sbi-NF-Peer-Info Header
    - Added Support for the 3gpp-Sbi-NF-Peer-Info Header section, which enables network elements to obtain source and destination information for messages exchanged between a specified pair of NF (service) instances.
    - Added the following fields under NF Peer Info Settings in the NF Communication Profiles section:
      - Send NF-Peer-Info Header
      - Include NF Service Instance ID
    - Added the following metrics in the Sbi-NF-Peer-Info Header Metrics section:
      - occnp_nf_peer_info_header_received_total
      - occnp_nf_peer_info_header_sent_total
    - Added SAVE_SRC_SERV_INST parameter in the advanced settings for the following sections:
    - Added NF_PEER_INFO_FIND_OPTIMIZE_SRC parameter to the advanced settings in the PDS Settings section.
  - Supports pcfIpEndPoints in pcfBinding- BSF Registration
    - Added Supports pcfIpEndPoints in pcfBinding- BSF Registration section to enable SM Service to send the information present in the ipEndPoints of the NF Profile in its Binding Registration request.
    - Added the following fields in the PCF Session Management section:
      - Service FQDN and IP Endpoints Configuration
      - NF Profile for Service FQDN and IP Endpoints
    - Removed the following Advance Settings from the PCF Session Management section:
      - BINDING.REGISTRATION.INCLUDE.IP_ENDPOINTS
      - BINDING.REGISTRATION.INCLUDE.IP_ENDPOINTS.SERVICE_NAME
  - Optimize Database Lookup in SM Service
    - Added Optimize Database Lookup in SM Service section, which improves PCF capacity per instance by reducing the storage footprint, database load, database replication, and latency in the SM Service.
    - Added BINDING.DEPENDENTCONTEXTBINDING_PROCESSING parameter in the advanced settings in the PCF Session Management section.
    - Added occnp_dependentContextBinding_processing_total metrics in the Binding Service Metrics section.
  - Added the Disabling mTLS to Establish Communication between Policy and cnDBtier section with information to disable mTLS to establish communication between Policy and cnDBtier.
  - Security Context
    - Added Security Context section, which improves the security posture of deployed workloads Policy by applying Kubernetes pod and container security context settings.
- Enhancements:
  - Assume Positive Support for SM Service During Overload Condition
    - Updated Enhancement to Overload Control Handling in SM Service section with description of Assume Positive support for handling Overload Control at SM Service.
    - Added Default Processing Profiles to describe creating and configuring Default Processing Profiles.
    - Added Service Profiles to describe creating and configuring service profiles.
    - Added Default Processing to PCF Session Management, which is used to configure Default Processing Profile for SM service.
    - Added MSG_PROCESSING_DEFAULTS.ENABLED_ON_PRE_FAILURE advanced settings key to PCF Session Management, which is used to indicate if the default PCC rules and session rules configured using Default Processing Profile must be applied on Session creation in case of PRE failure.
    - Added the following new fields to Overload Configurations:
      - Service Profile
      - Service Profile Apply Percentage
    - Updated Overload Control Threshold to describe support for additional load levels up to L10 for configuring overload control for SM service and Diameter Connector service.
    - Updated Discard Policy to describe support for additional load levels up to L10 for configuring overload control for SM service and Diameter Connector service.
    - Updated Load Shedding Profiles to describe support for additional load levels up to L10 for configuring overload control for SM service and Diameter Connector service.
    - Added the following metrics to SM Service Metrics:
      - occnp_enhanced_overload_service_interaction_total
      - occnp_enhanced_overload_ssv_update_skipped_total
    - Added the following alerts to PCF Alerts:
      - SM_SVC_REQ_ENHANCED_OVERLOAD_SERVICE_INTERACTION_SKIPPED _MINOR
      - SM_SVC_REQ_ENHANCED_OVERLOAD_SERVICE_INTERACTION_SKIPPED _MAJOR
      - SM_SVC_REQ_ENHANCED_OVERLOAD_SERVICE_INTERACTION_SKIPPED _CRITICAL
  - Support to Write Remote Subscriber State Variables to Operator Specific Data (OSD)
    - Added Support to Write Remote Subscriber State Variables to Operator Specific Data (OSD) section to write values received from Online Charging System (OCS) provided counters into Operator Specific Data (OSD) in the UDR using Remote State Variables.
    - Added Operator Specific Data field to enable the operator to specify the paths in OSD in PDS Settings section.
    - Added ENABLE_OCS_ERROR_HANDLING parameter in the advanced settings in the PDS Settings section.
  - Updated the examples to add method dimension for the following metrics in the Policy DS Metrics section:
    - server_request_total
    - server_response_total
  - Updated the examples for the following metrics in the UDR Metrics section:
    - ocpm_udr_tracking_request_total
    - ocpm_udr_tracking_response_total
  - Support for DNN Replacement and Slice Support in AM Policy - Multiple Slice and DNN, updates UDR and AMF:
    - Updated Support for DNN Replacement and Slice Support in AM Policy section to describe support for multiple S-NSSAI and DNNs in SmfSelectionData to AMF for a UE and its respective AM Policy Association.
    - Added the following alerts to PCF Alerts:
      - DNN_REPLACEMENT_MANDATORY_IE_MISSING_ABOVE_MINOR_PERCENT
      - DNN_REPLACEMENT_MANDATORY_IE_MISSING_ABOVE_MAJOR_PERCENT
      - DNN_REPLACEMENT_MANDATORY_IE_MISSING_ABOVE_CRITICAL_PERCENT
  - UE Policy Enhancements - Handling N1N2MessageTransferError Responses with "retryAfter"
    - Updated UE Policy Enhancements - Handling of AMF Updates with Change in AMF ID- Interaction with N1N2Communication Session Retry and backoff.
    - Added Enable Retry-After IE to Retry Profiles section.
    - Added the following advanced settings key to PCF UE Policy Service:
      - CANCEL.ON.NEW.TRIGGER.ENABLED
      - CONCURRENCY.N15.REATTEMPT_TIMER_EXPIRY.ENABLED
      - CONCURRENCY.N15.REATTEMPT_TIMER_EXPIRY.LOCK_LEASE_DURATION
      - CONCURRENCY.N15.REATTEMPT_TIMER_EXPIRY.LOCK_REQUEST_RETRY_BACKOFF
      - CONCURRENCY.N15.REATTEMPT_TIMER_EXPIRY.LOCK_REQUEST_RETRY_COUNT
      - CONCURRENCY.N15.REATTEMPT_TIMER_EXPIRY.LOCK_WAIT_DURATION
      - RETRY.AFTER.IE.MAX.SECONDS
      - RETRY.AFTER.IE.TIMER.CAPACITY
      - RETRY.AFTER.IE.TIMER.RATE
      - TIMER_EXP_RANGE_MIN_SEC
    - Added the following new metrics to UE Service Metrics:
      - occnp_ue_update_guami_change_during_retryafter_cancelled_total
      - occnp_ue_delete_during_retryafter_total
      - occnp_ue_http_in_request_during_retryafter_total
      - occnp_n1n2transfer_error_with_retryafter_seconds
      - occnp_n1n2transfer_error_retryafter_invalid_total
    - Added the following alerts to PCF Alerts:
      - UE_N1N2_TRANSFER_RETRYAFTER_FAILURE_RATE_ABOVE_MINOR_THRESHOLD
      - UE_N1N2_TRANSFER_RETRYAFTER_FAILURE_RATE_ABOVE_MAJOR_THRESHOLD
      - UE_N1N2_TRANSFER_RETRYAFTER_FAILURE_RATE_ABOVE_CRITICAL_THRESHOLD
      - UE_N1N2_TRANSFER_INVALID_RETRYAFTER_VALUE_RATE_ABOVE_MINOR_THRESHOLD
      - UE_N1N2_TRANSFER_INVALID_RETRYAFTER_VALUE_RATE_ABOVE_MAJOR_THRESHOLD
      - UE_N1N2_TRANSFER_INVALID_RETRYAFTER_VALUE_RATE_ABOVE_CRITICAL_THRESHOLD
  - Support for cnDBTier APIs in CNC Console
    - Updated the Support for cnDBTier APIs in CNC Console section with details of the APIs IP Family Reference and Gracefully Start and Stop Georeplication.
    - Added the APIs IP Family Reference and Gracefully Stop and Start Georeplication to the section Viewing cnDBTier APIs in CNC Console.
- Binding - Remove Index-Based Lookup
  - Added Optimizing Lookup in Binding Service Database section to describe how Policy supports to optimize lookup in Binding service database by replacing index-based queries with primary-key searches and dedicated lookup tables.
  - Added the following fields to Binding Service, which are used to enable and configure query optimization:
    - Enable Indexing
    - Enable Query Optimization
    - Preferred Subscriber ID for Session Limit
  - Added the following metrics to Binding Service Metrics:
    - occnp_binding_index_restore_total
    - occnp_binding_index_total
- Enhanced logging (at WARN level) for microservices involved in PCRF & Diameter: Updated Logging Support for Error Response with the details of enhanced logging support for microservices involved in SM call flows.
General Updates:
- Added HTTP Error Codes supported for Policy as a consumer of AMF - UE Policy in HTTP Error Codes Supported by Policy section.
- Added the following procedure in the Diameter Pod Congestion Control section:
  - Load-Shedding Profile Storage and Validation
  - Unified Message Priority Profile Behavior
  - Conversion of Legacy Diameter Gateway Load Shedding Profiles
Updated the default value of the following Advance Settings from 50ms to 200ms:
- QUEUE_CONGESTION_RESOURCE_CALC_INTERVAL_MS
- CPU_CONGESTION_RESOURCE_CALC_INTERVAL_MS
Removed USER.ocsSpendingLimit.resetContextOnGxCreate parameter from PDS Settings section.
Added EGRESS_GATEWAY_DNS_RESOLUTION_FAILURE alert in the PCF Alerts section to detect DNS lookup failure.
Added SY.OptimizationType advanced settings key in the PCF Core Service Configurations section. This key is used for optimization handling of reauthorization flows triggered by OCS notifications .
Added GxSession table slicing configuration steps in the Support for Database Slicing section.
Added OPTIMISTIC_RETRY_BACKOFF_TIME_MS and DBEXCEPTION_RETRY_BACKOFF_TIME_MS advanced settings keys, which are used to configure the initial backoff delay before retrying a DB operation, and removed INTEGRITY_CONSTRAINT_RETRY_MAX_ATTEMPT from PDS Settings as OPTIMISTIC_RETRY_MAX_ATTEMPT key is used to set the retry count for all concurrency related exception thrown from DB.
Updated the Table D-7 and Table D-8 error code details in the Error Code Dictionary section.