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Public Safety
Cybertel Bridge strengthens public safety with cutting-edge solutions and devices
designed for inter-agency communication, Hybrid MCX Architecture, and eMBMS
Multicast Call. Our mission-critical technology ensures dependable and efficient
communication in the most critical situations.
Architecture to handle massive UE traffic
An MCX system is designed to support nationwide public safety communications with high stability and resilience. It must reliably support a broad range of multimedia services and withstand extreme traffic surges during emergencies.
Cybertel Bridge has use cases covering the challenges associated with high-volume UE traffic and the architectural solution implemented to overcome these challenges.
Challenge
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Managing High Traffic Volumes:
- Public safety communications (MCX), which serve the entire nation, must provide a stable system that supports a wide range of multimedia services.
- In the normal operation, Approximately 15–20% of total subscribers are active but during emergency operations, active user numbers surge rapidly.
- If the MCX system fails to handle this massive traffic load, it could result in a breakdown of critical public safety communications and cause significant social disruption.
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Risks in Emergency Situations:
- The inability to effectively manage sudden traffic surges in emergency scenarios can lead to system failure, undermining disaster resilience and potentially impacting overall societal stability.
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Geo Redundancy Complexity:
- To mitigate risks, MCX systems are designed with geo redundancy.
- However, the coordination between primary and backup systems introduces complexity. For instance, ensuring rapid health checks and smooth failover transitions while synchronizing user data and configurations is critical for maintaining service continuity.
Cybertel Solution
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Centralized Data Centers Deployment:
- The initial configuration (Init. configuration) is handled by centralized Common Service Core (CSC) server and associated DB server located in the central data centers.
- When a user logs in, this CSC server processes the initial signalling traffic, ensuring a quick and efficient setup.
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Pre-Defined Matrix Table:
- The central CSC server contains a matrix table which pre-defining user location data and the corresponding local data centers.
- Once a user is authenticated, the server identifies the user location and immediately routes the traffic to the appropriate local CSC server.
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Distributed CSC Functionality and Traffic separation:
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Local Data Centers Operations:
Beyond initial configuration, all other CSC functions—such as IdMS, KMS, CMS, and GMS—are executed by CSC servers in local data centers.
This separation allows the system to distribute the processing load effectively. -
Media Traffic Processing:
Once the user is authenticated, the Media Resource Function (MRF) server takes charge of handling media traffic. This division ensures that signalling and media data are processed independently, optimizing performance and responsiveness.
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Clear separation of Duties:
By assigning user signalling to the central data centers and media traffic to local data centers, Cybertel MCX system is designed to smoothly handle massive user loads, even during peak times or emergency conditions.
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Active – Active mode operation;
- The architecture supports up to 3 central data centers and up to 10 local data centers, allowing for multiple central data centers to operate in active-active mode.
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Enhanced Traffic Distribution:
This multi-central active-active configuration provides additional traffic distribution, which helps maintain stable communication even under extreme traffic conditions.
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Network Traffic Distribution:
Cybertel MCX system integrates separate load balancers to distribute HTTP and database traffic efficiently. In large-scale deployments, the load balancers direct traffic through L4 switches, ensuring that no single node becomes a bottleneck.
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· Database Traffic:
Multiple MCX DBs are synchronized via clustering and the load balancer distributes database requests to optimize performance.
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· HTTP Traffic:
HTTP requests from UE are routed to a virtual IP managed by the load balancer, streamlining the handling of signalling messages and service requests.
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User Plane Data Distribution:
The MCX traffic is split into control plane and user plane data. While CSC server processes signalling data, MCX AS / MRF server handles user plane traffic.
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· Dynamic Allocation:
The MCS AS dynamically allocates MRF servers based on group configurations and signalling messages, ensuring that user plane data is processed by the optimal server.
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· Scalability:
Multiple MRF daemons can operate on a single MRF server with the capacity to manage up to thousands of concurrent users per daemon.
For groups exceeding this threshold, the system can deploy evolved Multimedia Broadcast & Multicast Service (eMBMS) for efficient distribution.
Cybertel's MCX architecture leverages centralized and localized data centers roles to efficiently manage both signalling and media traffic.
This strategic division of tasks ensures that the system can robustly handle massive user traffic thereby enhancing the resilience and reliability of public safety communications.
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