Regional Delay-Based Central Server Selection for Group Calls

The patent divides the server selection process into multiple stages: first determining candidate servers based on basic connectivity, then evaluating each candidate against multiple performance metrics (delay periods to different regions, load capacity, bandwidth), and finally selecting the optimal server. This segmented approach maintains operational simplicity while achieving reliable, consistent communication quality across regions.

The patent introduces multiple evaluation parameters (delay periods to different target regions, load capacity, bandwidth availability) to transform the server selection from a simple choice to a multi-dimensional optimization problem. By changing the selection criteria from single-parameter to multi-parameter evaluation, the system achieves both ease of operation through automated scoring and reliability through comprehensive quality assessment.

The patent applies local quality by evaluating server performance specifically for each target region rather than using a uniform assessment. Each candidate server is tested for delay periods to multiple specific regions, and the selection criteria are tailored to minimize regional disparities. This ensures that the selected server provides consistently low delay across all regions without requiring overly complex selection mechanisms.

The patent adds the dimensional aspect of geographical region distribution to the server selection process. Instead of selecting servers based solely on technical capabilities, the system evaluates performance across multiple spatial dimensions (different target regions), transforming a one-dimensional selection into a multi-dimensional optimization that accounts for geographical distribution and minimizes communication delay variations.

The patent implements preliminary action by pre-establishing a pool of candidate servers and pre-evaluating their performance metrics before actual group calls occur. When a group call is initiated, the system can quickly select from pre-vetted candidates based on current conditions, rather than waiting for all members to join before beginning the selection process. This maintains selection accuracy while significantly reducing establishment time.

The patent introduces dynamic adaptation by allowing the server selection to be based on the current subset of members who have joined, rather than requiring complete member participation. The system dynamically adjusts the selection criteria and evaluation based on the actual participants, enabling comprehensive yet timely server selection that adapts to varying group composition scenarios.