D2D Gateway Sidelinks for Low-Latency Interconnected LANs
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Solution Overview
Problem
Interconnecting local area networks (LANs) using 5G LAN-type services can be inefficient when they are geographically close, leading to transmission inefficiency and delay due to traffic routing through radio access network nodes and the 5G core network.
Innovation Solution
Implementing device-to-device (D2D) connections, specifically sidelinks as per 3GPP standards, to directly connect gateway UEs of LANs, enabling direct data transmissions without relying on 5G LAN-type services, and utilizing discovery and routing processes to manage device mappings and link qualities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 5G LAN-type services are used to interconnect geographically close LANs, then network coverage and security are improved, but transmission delay and efficiency deteriorate due to routing through RAN nodes and core network
Solution Approach 1:
The patent introduces D2D sidelink technology as an intermediary communication path between gateway UEs of geographically close LANs. This intermediary mechanism enables direct peer-to-peer data transmission without requiring routing through RAN nodes and 5G core network, thereby reducing transmission delay while maintaining network security through controlled access and authentication protocols
Solution Approach 2:
The patent segments the network communication path into two distinct modes: traditional 5G LAN-type services for general coverage and D2D sidelink mode for geographically close LANs. By segmenting the communication architecture, the system can selectively apply the most efficient transmission path based on geographic proximity, optimizing both security and transmission performance
2Reliability
If 5G LAN-type services are used for LAN interconnection, then network management and security are improved, but device complexity and cost increase
Solution Approach 1:
The patent implements dynamic communication mode selection where gateway UEs can switch between traditional 5G LAN-type services and D2D sidelink mode based on geographic proximity and network conditions. This dynamic approach reduces system complexity by enabling direct communication when appropriate, while maintaining network management capabilities through configurable policies and centralized control when needed
3Reliability
If traditional 5G routing is used for inter-LAN communication, then network control and security are improved, but transmission efficiency and speed deteriorate
Solution Approach 1:
The patent performs preliminary actions by pre-establishing D2D sidelink connections between gateway UEs before actual data transmission occurs. This preliminary connection setup enables direct high-speed communication paths to be ready in advance, allowing rapid data exchange when geographically close LANs need to communicate, thereby improving transmission speed while maintaining network control through pre-configured security protocols
Data Source
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AI summary
A method can include receiving member information from first member devices at a first gateway UE in a device-to-device (D2D) LAN. The D2D LAN can include a first sub-LAN and at least one second sub-LAN. The first sub-LAN can include the first gateway UE and the first member devices. Each of the second sub-LANs can include a second gateway UE and a set of second member devices. The first and second gateway UEs can be connected with sidelinks. The member information can indicate a first DEVICE ID associated with the respective first member device. A first member device list including the first DEVICE IDs of the first member devices can be updated based on the received member information. A first mapping update message including the updated first member device list and a first gateway ID of the first gateway UE can be broadcast to the second gateway UEs.