Local Network Controller for VoLTE Connection Setup
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Solution Overview
Problem
Existing communication networks face delays and congestion due to Circuit-Switched (CS) fallback when establishing voice or data connections between User Equipment (UE) from different network operators, as they rely on IP address assignment and traffic routing through Mobility Management Entity (MME) and Serving Gateway/Packet data network Gateway (SGW/PGW), leading to high traffic and potential connection delays.
Innovation Solution
A network controlling system that includes a local and central network controller to manage Radio Resource Control (RRC) requests, assigning IP addresses and establishing traffic engineered tunnels between network entities within the same broadband communication network, thereby avoiding CS fallback and reducing reliance on remote anchoring gateways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connection is anchored at the SGW/PGW for UEs belonging to same network as well as different networks, then the connection can be established, but high traffic occurs at the MME/SGW/PGW leading to delay and congestion
Solution Approach 1:
The patent segments the connection establishment process by introducing local MMEs that handle connection requests locally before forwarding to the central MME. This segmentation reduces the traffic burden on the central MME/SGW/PGW by processing connection requests at multiple distributed locations, thereby reducing congestion and delay while maintaining reliable connection establishment.
2Adaptability or versatility
If the LTE network uses IP address assignment for voice calls/data connection, then the connection can be established without CS fallback, but the IP address is private and known only to the MME causing complexity in direct communication
Solution Approach 1:
The patent introduces local MMEs as intermediary entities that manage private IP address assignments locally. Each local MME acts as a mediator between the central MME and local network entities, handling IP address allocation and routing decisions locally. This intermediary structure enables direct communication capability while containing IP address management complexity within localized scopes rather than requiring global coordination.
3Reliability
If the UE falls back to 2G network for voice calls/data connection, then the connection can be established, but additional network complexity and cost are incurred
Solution Approach 1:
The patent implements local MMEs that provide multi-functional capabilities including IP address assignment, connection routing, and traffic management for both LTE and legacy networks. These local MMEs serve as universal controllers that can handle diverse connection types without requiring separate dedicated infrastructure for each network type, thereby reducing overall network architecture complexity while maintaining reliable connection establishment across different networks.
Data Source
AI summary
The present disclosure relates to field of telecommunication that provides method and system for connecting network entities in broadband communication network without Circuit-Switched fallback. Primary network entity sends a request to local network controller that ensures interoperability and reduces delay in setting up voice/data connection. The local network controller forwards the request to the central network controller that identifies the destination intermediate network entity. If the destination intermediate network entity is present in the same network as the source intermediate network entity, the central network controller assigns an IP address and establishes a traffic engineered tunnel which in turn establishes the voice calls/data connection between the primary and the secondary network entity. Otherwise, the voice calls/data connection is forwarded to a Remote Anchoring Gateway. The present disclosure reduces congestion as the request reaches Remote Anchoring Gateway only when the source and the destination intermediate network entities are in different networks.