Access Network Latency Reduction via Direct Multicast
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Solution Overview
Problem
Current cellular communication networks experience high latency, which is not sufficient for safety-critical applications like telematics, where real-time communication is essential, especially in vehicle-to-vehicle communication.
Innovation Solution
The method involves receiving information with content and position data from user terminals in the access network and transmitting it directly to selected user terminals via multicast or broadcast, bypassing the core network, using the uplink channel for initial data transmission without prior channel assignment, and utilizing an analysis device within the access network for immediate data distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted through the core network (SGSN/GGSN to central server and back), then data routing is centralized and controlled, but latency is high (above requirements for telematics applications)
Solution Approach 1:
The patent segments the network into access network and core network, allowing data to be handled locally in the access network for latency-sensitive applications while maintaining core network control for non-time-critical traffic. This segmentation enables parallel processing paths where urgent data stays in the access network rather than traversing the entire core network path.
Solution Approach 2:
The patent introduces a new dimension of direct peer-to-peer communication between user terminals within the access network, bypassing the traditional hierarchical path through core network elements. This creates a shortcut dimension that reduces transmission hops and latency while maintaining network control through the base station.
2Loss of time
If direct communication between terminals is established, then latency is reduced, but network control and security management become more difficult
Solution Approach 1:
The base station serves as an intermediary that facilitates direct terminal-to-terminal communication while maintaining network control. It performs authentication, authorizes direct communication requests, and monitors data flows, thus reducing latency through direct paths while preserving centralized security and control functions.
Solution Approach 2:
The patent implements dynamic communication modes where the network can switch between traditional routed communication and direct peer-to-peer communication based on latency requirements, security considerations, and network conditions. This dynamic approach allows the system to optimize for speed when needed while maintaining control when security is paramount.
Data Source
AI summary
The present invention relates, inter alia, to a method for reducing the latency of data transmission within a cellular communication network (10), in particular a mobile communications network, during communication between user terminal equipment (13; 14, 15), wherein the communication network (10) comprises a core network (11) and an access network (12) which provides a connection between the user terminal equipment (13, 14, 15) and the core network (11).To achieve a drastic reduction in latency, thereby enabling the use of cellular communication, particularly for safety-critical applications, the invention provides that information sent by a user terminal device (13) is received in the access network (12), optionally analyzed in an analysis unit (17) within the access network (12), and at least partially transmitted directly from the access network (12) to at least selected user terminal devices (14, 15). Furthermore, a method for communication between user terminal devices and a cellular communication network are described.