Sidelink DMRS Bundling Resource Selection for Phase Continuity
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Solution Overview
Problem
Current sidelink DMRS bundling in wireless communication systems is limited by the assumption of a static channel, which fails to account for phase continuity and phase jumps, leading to inefficiencies in high mobility scenarios where channel changes occur rapidly.
Innovation Solution
The proposed solution involves determining and indicating sidelink resources for bundling sidelink DMRS transmissions, including options for maintaining phase continuity or using phase jump reference signals, allowing for flexible resource selection and improved channel estimation in dynamic environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If DMRS bundling is performed over multiple sidelink resources, then channel estimation accuracy is improved, but the system fails to account for phase continuity and phase jumps in high mobility scenarios
Solution Approach 1:
The patent introduces dynamic adaptability in DMRS bundling by enabling the receiving UE to configure whether phase continuity is maintained or phase jump reference signals are used, based on the actual channel conditions and mobility scenario. This allows the system to transition between different processing modes (phase continuous mode and phase jump mode) to adapt to changing mobility conditions while maintaining accurate channel estimation.
2Device complexity
If phase continuity is maintained in DMRS bundling, then channel estimation is simplified, but the system cannot handle rapid channel changes in high mobility scenarios
Solution Approach 1:
The patent changes the parameter of phase handling by introducing a configuration indicator that allows the receiving UE to select between different phase handling approaches. When phase continuity cannot be maintained due to rapid channel changes, the system switches to using phase jump reference signals, thereby adapting the estimation method to the current channel dynamics while maintaining reliability.
3Adaptability or versatility
If DMRS bundling configuration is added to SCI messages, then resource selection flexibility is improved, but message complexity increases
Solution Approach 1:
The patent applies local quality by adding DMRS bundling configuration information only to the SCI message when needed, rather than always including it. The configuration indicator is selectively included based on whether DMRS bundling is activated and whether phase continuity or phase jump handling is required, thereby minimizing message complexity while providing flexibility when needed.
Data Source
AI summary
Systems, methods, and devices for wireless communication that support resource selection and indication for sidelink demodulation reference signal (DMRS) bundling. A transmitting UE determines sidelink resources for bundling a sidelink DMRS transmission to be transmitted to a receiving UE. In sidelink mode 1, the sidelink resources may be determined based on indications from a base station, which may include whether the transmitting UE is to maintain phase continuity over the sidelink resources during the bundling, or whether the transmitting UE is to include a phase jump reference signal with the bundled DMRS transmission to the receiving UE. In sidelink mode 2, the transmitting UE may select the sidelink resources based on the phase continuity capabilities of the transmitting UE and/or of the receiving UE, and/or based on a sensing of the sidelink channel. In some cases, the receiving UE may provide a resource recommendation to the transmitting UE.