Radio Node Selective Synchronization for D2D Networks
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Solution Overview
Problem
Existing wireless communications networks face inefficiencies in providing synchronization information for Device-to-Device (D2D) communications, particularly when radio nodes acting as synchronization sources or relays need to be deactivated or replaced, leading to signaling overhead and potential interference.
Innovation Solution
A method and system where a radio node selectively provides synchronization information for D2D communications by receiving indications to stop or continue providing synchronization information, allowing for flexible deactivation and reactivation based on internal or external requests, such as from neighboring nodes or higher layers, thereby reducing interference and improving network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a radio node continuously provides synchronization information for D2D communications, then synchronization reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent implements dynamic control of synchronization information transmission by allowing radio nodes to adjust their synchronization provision status based on received indications. The system transitions from static continuous transmission to dynamic on-demand transmission, where nodes can be activated or deactivated as synchronization sources or relays based on network conditions and requirements.
Solution Approach 2:
The patent enables radio nodes to autonomously determine whether to continue providing synchronization information by evaluating received indications against their own operational status and network requirements. Each node independently manages its synchronization provision function based on local decisions combined with network-wide coordination signals.
2Quantity of substance
If a radio node deactivates synchronization information provision, then signaling overhead is reduced, but synchronization stability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where radio nodes send indications to other nodes about their synchronization provision status. When a node deactivates its synchronization function, it notifies other nodes, which can then adjust their behavior accordingly. This feedback loop maintains synchronization stability by ensuring all nodes have consistent information about available synchronization sources and relays.
Solution Approach 2:
The patent introduces indication messages as intermediary signals that coordinate synchronization status changes across the network. These indications act as mediators that convey activation/deactivation decisions from one node to others, ensuring coordinated transitions that maintain overall network synchronization stability during changes.
3Area of stationary object
If multiple radio nodes provide synchronization information simultaneously, then coverage area is expanded, but interference increases
Solution Approach 1:
The patent implements local quality control by allowing different radio nodes to provide synchronization information in different spatial regions or under different conditions. Instead of uniform simultaneous transmission from all nodes, the system enables selective activation where specific nodes provide synchronization services in specific areas or time periods, reducing overlap and interference while maintaining broad coverage.
Solution Approach 2:
The patent dynamically adjusts which radio nodes provide synchronization information based on received indications and current network conditions. This dynamic allocation allows the system to optimize the number and location of active synchronization sources, expanding coverage area while minimizing interference by avoiding simultaneous transmission from all nodes at all times.
Data Source
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AI summary
A method performed by a radio node for selectively providing synchronization information for Device-to-Device, D2D, communications between devices in a wireless communications network is provided. The radio node receives, when the radio node is providing synchronization information an indication to stop providing synchronization information for D2D communications. The radio node (120) determines whether to continue to provide synchronization information for D2D communications or not based on the received indication. A radio node for selectively providing synchronization information for Device-to- Device, D2D, communications between devices in a wireless communications network is also provided.