Radio Node Synchronization Signal Timing Coordination
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Solution Overview
Problem
In LTE-NX networks, the traditional synchronization signal transmission methods lead to self-interference and increased operation complexity due to the dense deployment and flexible duplex features, which are not effectively managed by existing technologies.
Innovation Solution
The proposed method coordinates synchronization signal transmission timings among radio nodes by determining and staggering the downlink transmission time positions, allowing radio nodes to receive synchronization signals from superior nodes and transmit them to subordinate nodes while avoiding self-interference, thereby reducing operation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronization signals are transmitted at fixed and known timing positions in LTE-NX networks with dense deployment and flexible duplex, then initial UE access and cell search can be performed, but self-interference occurs and operation complexity increases
Solution Approach 1:
The patent applies preliminary action by determining and notifying subordinate radio nodes of the downlink transmission time position for synchronization signals in advance. This allows subordinate nodes to prepare for potential self-interference scenarios before they occur, enabling them to adjust their transmission timing or power levels proactively, thereby reducing self-interference while maintaining reliable synchronization signal transmission.
Solution Approach 2:
The patent implements dynamics by introducing flexible timing adjustment for synchronization signal transmission. Instead of fixed timing, the system dynamically determines downlink transmission time positions based on network conditions, subordinate node capabilities, and interference scenarios. This dynamic approach allows the system to adapt transmission timing to avoid self-interference while maintaining synchronization reliability.
2Ease of operation
If synchronization signals are transmitted at fixed and known timing positions, then cell search procedure can be performed, but operation complexity increases due to dense deployment and flexible duplex
Solution Approach 1:
The patent applies parameter changes by modifying the timing parameter of synchronization signal transmission. Instead of using fixed timing positions, the system changes the transmission time position parameter dynamically based on network conditions. This parameter adjustment simplifies operation by providing clear timing instructions to subordinate nodes, reducing the complexity of cell search procedures in dense deployment scenarios with flexible duplex.
Data Source
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AI summary
The present disclosure relates to a method used in a radio node, and an associated radio node. The radio node is served by a superior radio node and serves one or more subordinate radio nodes. The method includes: receiving a first synchronization signal from the superior radio node; obtaining a first downlink transmission time position for the first synchronization signal; determining a second downlink transmission time position for a second synchronization signal to be transmitted by the radio node, based on the first downlink transmission time position; and transmitting the second synchronization signal via the second downlink transmission time position to the one or more subordinate radio nodes.