LoRa Gateway Relay Coordination for Full-Duplex Operation
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Solution Overview
Problem
LoRa networks face congestion and performance issues due to gateways operating in half-duplex mode, where simultaneous transmission and reception are not possible, and synchronizing full-duplex functionality without GPS modules is challenging, leading to increased costs and complexity.
Innovation Solution
A communication method that determines a second gateway to relay responses, different from the initial gateway, by considering clock differences and adaptive subset formation, allowing for full-duplex functionality without GPS modules, thereby preventing congestion and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gateways are divided into transmission and reception parts and geographically separated to enable full-duplex mode, then simultaneous transmission and reception is achieved, but device complexity and cost increase due to synchronization requirements
Solution Approach 1:
The gateway functionality is segmented into transmission and reception parts that can be geographically separated. Each part operates independently but is coordinated through the invention's synchronization method using existing clock references, avoiding the need for complex GPS-based synchronization systems.
Solution Approach 2:
The invention introduces an intermediary synchronization mechanism that uses existing clock references and message timing information to coordinate between transmission and reception parts. This mediator approach enables full-duplex operation without requiring expensive GPS modules in each gateway.
2Reliability
If the same gateway relays responses to uplink frames, then transmission quality is optimized, but downlink channel congestion occurs
Solution Approach 1:
The invention combines multiple gateways into a collaborative relay system. Instead of relying on a single gateway for response relaying, multiple gateways work together, distributing the downlink traffic load and preventing congestion while maintaining transmission quality through coordinated operation.
Solution Approach 2:
The invention implements dynamic gateway selection and load distribution mechanisms. Gateways can dynamically assume transmission or reception roles based on current network conditions, allowing flexible adaptation to prevent congestion while optimizing transmission quality for each communication session.
Data Source
AI summary
A communication method, executed in a network of the LoRa type wherein terminals communicate with a server by means of gateways in a set of gateways, each gateway being associated with a set of terminals comprising at least one terminal using said gateway to communicate with the server. The method enables a second gateway to relay, in a downlink frame, a response to a message received in an uplink frame by a first gateway, different from the second gateway, even if the second gateway has not received the uplink frame.