High-Mobility Reference Signal Allocation for Link Quality
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Solution Overview
Problem
Current reference signaling in wireless communication systems, particularly for high-mobility devices, is inadequate in maintaining link quality due to the assumption of low-mobility speeds, leading to performance degradation at higher speeds.
Innovation Solution
A method is introduced where a base station identifies high-mobility wireless communication devices and allocates an additional specific reference signal, such as a User Equipment-specific Reference Signal (UE-RS), with increased time density, using the same or different scrambling sequences and resource element mapping mechanisms as the baseline UE-RS, to improve feedback frequency and link quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If typical reference signaling is used for high-mobility devices, then device complexity is reduced, but link quality deteriorates due to insufficient feedback frequency
Solution Approach 1:
The reference signal is segmented into multiple components: baseline UE-RS and additional UE-RS. The baseline UE-RS maintains the original structure for compatibility, while the additional UE-RS is introduced specifically for high-mobility scenarios. This segmentation allows the system to enhance link quality for high-mobility devices without significantly increasing overall complexity, as the additional signal is only activated when needed.
Solution Approach 2:
The reference signal configuration is made dynamic by introducing an additional UE-RS with increased time density specifically for high-mobility devices. The system adapts the reference signal structure based on device mobility characteristics, transitioning from a static baseline configuration to a dynamic enhanced configuration that adjusts feedback frequency according to mobility requirements.
2Productivity
If additional specific reference signals are allocated to high-mobility devices, then feedback frequency improves, but signal complexity increases
Solution Approach 1:
The enhanced reference signal structure applies different qualities to different parts of the signal. The additional UE-RS components are specifically designed with higher time density only for high-mobility devices, while baseline devices continue to use the original reference signal structure. This local quality enhancement improves feedback frequency for high-mobility devices without unnecessarily increasing complexity for all devices.
Solution Approach 2:
The invention changes key parameters of the reference signal for high-mobility devices, specifically increasing the time density by adding additional UE-RS components. These parameter changes are selectively applied based on device mobility classification, allowing the system to improve feedback frequency for high-mobility devices while maintaining efficient reference signal processing for baseline devices.
3Reliability
If reference signal density is increased for high-mobility devices, then communication quality improves, but resource overhead increases
Solution Approach 1:
The reference signal density is made dynamic rather than static. The system transitions from a uniform reference signal density for all devices to a dynamic density that increases only for high-mobility devices through the addition of UE-RS. This dynamic adjustment ensures that increased resource overhead is incurred only when and where it is necessary to maintain communication quality.
Solution Approach 2:
The enhanced reference signal structure applies different densities locally to different device groups. High-mobility devices receive additional UE-RS components with increased time density, while baseline devices continue to use the original reference signal density. This local quality enhancement ensures that resource overhead increases only for the specific subset of devices that require it, rather than uniformly across all devices.
Data Source
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AI summary
A base station for enabling communication with a high-mobility wireless communication device is described. The base station includes a processor and instructions stored in memory. The base station identifies a high-mobility wireless communication device and sends a reference signal configuration. The base station also allocates an additional specific reference signal and sends the additional specific reference signal to the high-mobility wireless communication device.