How do you optimize HLR selection for roaming subscribers in a multi-vendor core network?

1 Analyze the roaming traffic

The first step is to analyze the roaming traffic patterns and characteristics of your core network. You need to identify the sources and destinations of the roaming subscribers, the volume and frequency of the calls and data sessions, the types and versions of the network equipment and protocols, and the service level agreements (SLAs) and tariffs of the roaming partners. This will help you understand the current performance and challenges of your HLR selection process and identify the areas for improvement.

2 Configure the HLR selection rules

The second step is to configure the HLR selection rules based on the analysis results. You need to define the criteria and priorities for choosing the best HLR for each roaming subscriber. For example, you can use the Mobile Country Code (MCC) and Mobile Network Code (MNC) of the subscriber's home network, the International Mobile Subscriber Identity (IMSI) range, the VLR address, or the roaming partner's preference as the criteria. You can also assign different weights or scores to each criterion based on the importance or relevance. The HLR selection rules can be implemented using different methods, such as static or dynamic routing tables, prefix or suffix matching, or intelligent network (IN) services.

3 Monitor the HLR selection performance

The third step is to monitor the HLR selection performance and evaluate the impact on the service quality, signaling efficiency, and cost savings. You need to collect and analyze the key performance indicators (KPIs) and metrics, such as the HLR selection success rate, the number and duration of the HLR queries, the HLR load and availability, the call setup time and drop rate, and the roaming revenue and expenses. You also need to compare the performance before and after the optimization and identify any anomalies or issues that may affect the HLR selection process.

4 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?