Wireless Relay Node Management for Ultra-Reliable Links
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Solution Overview
Problem
Existing wireless communication networks fail to maintain ultra-reliable communication links for mobile devices, particularly in scenarios where devices move into and out of coverage areas, leading to disruptions and unreliable connections.
Innovation Solution
A network node dynamically manages relay nodes by assessing and prioritizing communication devices within its coverage area to ensure continuous communication links, restricting the movement of appointed relay nodes to maintain link quality and using a limited number of relay nodes to minimize latency and power overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dynamic mobile relays are used to improve communication performance, then coverage and reliability are enhanced, but the communication link is disrupted when devices move into non-coverage regions
Solution Approach 1:
The network node predicts future communication needs by assessing device trajectories and coverage areas in advance. It proactively selects relay nodes before devices enter non-coverage regions, establishing relay connections ahead of time to prevent disruption when devices move into areas without direct network coverage.
Solution Approach 2:
The system dynamically adapts relay node selection based on real-time device positions, trajectories, and coverage conditions. The network node continuously updates relay assignments as devices move, switching between direct and relayed communication modes to maintain optimal link stability throughout the device's movement path.
2Reliability
If multiple relay nodes are deployed to ensure continuous coverage, then communication reliability is improved, but system complexity and overhead increase
Solution Approach 1:
The network node assesses local conditions including device trajectories, coverage areas, and channel qualities to select the most appropriate relay node for each specific situation. This localized approach ensures that relay selection is optimized for individual device needs rather than using a uniform relay deployment strategy, reducing overall system complexity.
Solution Approach 2:
The system continuously monitors communication link quality and device positions, using this feedback to dynamically adjust relay node selections. The network node receives channel quality indicators and position information, processes this feedback to assess whether current relay nodes remain optimal, and switches relays when necessary to maintain reliability while avoiding unnecessary complexity.
3Reliability
If relay nodes restrict their movement to maintain link quality, then communication reliability is sustained, but device mobility freedom is reduced
Solution Approach 1:
Instead of completely restricting relay node movement, the system applies partial constraints only when necessary to maintain communication quality. The network node allows relay nodes to move freely within reasonable limits but restricts movement only to the extent needed to preserve link quality, balancing reliability requirements with device mobility freedom.
Data Source
AI summary
A network node and method therein for ultra-reliable communication with a communication device in a wireless communications network are disclosed. The network node determines whether the communication with a second communication device is to be relayed via a relay node and determines that the first communication device is able to act as a relay node for the second communication device. The network node requests the first communication device to operate in a relay mode for relaying communications to the second communication device. The network node communicates with the second communication device over a relay link from the network node to the first communication device and from the first communication device to the second communication device.