Dynamic Synchronization Signal Parameter Adjustment for Millimeter Wave Detection
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Solution Overview
Problem
In millimeter wave wireless communication systems, the detection of narrowband and wideband synchronization signals by user equipment (UEs) is inconsistent due to differences in signal propagation and environmental factors, leading to unreliable detection, especially at the edge of cell coverage areas.
Innovation Solution
A base station dynamically adjusts the parameters of narrowband and wideband signal components, such as transmission power and bandwidth, based on network characteristics like timing synchronization, interference, and pathloss, to improve detection reliability across the coverage area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a fixed narrowband/wideband signal configuration is used, then the narrowband signal propagates farther with higher power, but detection reliability becomes inconsistent across different geographic areas and network conditions
Solution Approach 1:
The patent implements dynamic adjustment of synchronization signal parameters including transmission power, bandwidth, and beamforming configurations based on real-time network conditions, UE capabilities, and geographic location. This allows the system to adapt signal characteristics to maintain consistent detection reliability across varying propagation distances and environmental conditions rather than using fixed configurations
Solution Approach 2:
The system changes multiple signal parameters simultaneously including narrowband signal power, wideband signal power, bandwidth allocations, and beamforming angles based on network conditions. This multi-parameter adjustment enables the system to optimize both propagation distance and detection reliability by tuning the signal characteristics to match current operational requirements
2Area of stationary object
If beamformed synchronization signals are swept across the cell coverage area, then coverage enhancement is provided to improve detection, but system complexity and signal transmission time increase
Solution Approach 1:
The patent divides the cell coverage area into multiple sectors or regions, each served by specific beamforming configurations. Instead of sweeping beams across the entire cell sequentially, the system segments coverage and uses targeted beamforming for each segment, reducing the time and complexity required while maintaining comprehensive coverage
Solution Approach 2:
The system implements periodic beam sweeping at optimized intervals rather than continuous sweeping. Beamformed synchronization signals are transmitted in periodic bursts across different beam directions, allowing UEs to detect signals at regular intervals while reducing overall system complexity and power consumption compared to continuous full-cell sweeping
3Length of moving object
If high power narrowband signal is transmitted, then the signal propagates farther, but detection at the edge of cell coverage areas remains unreliable due to lower power wideband signal
Solution Approach 1:
The patent combines narrowband and wideband synchronization signals in a coordinated manner, transmitting both signal types simultaneously with optimized power allocation. The narrowband signal provides extended propagation distance while the wideband signal provides robust detection capability. By merging these complementary signal types with dynamically adjusted power levels, the system achieves both far propagation and reliable detection at cell edges
Solution Approach 2:
The system applies different power levels and signal characteristics tailored to specific geographic regions within the cell. At cell center regions, one configuration may be optimal, while at cell edge regions, different power allocations and signal parameters are used. This local optimization ensures that each region receives the appropriate signal quality for reliable detection
Data Source
AI summary
Methods, systems, and devices are described for dynamic directional synchronization signal signals in a millimeter wave communication system. A base station may determine a narrowband signal component and a wideband signal component of a synchronization signal for millimeter wave communications. The base station may identify network characteristic(s) of the millimeter wave communication network and adjust parameter(s) of the narrowband signal and/or the wideband signal components of the synchronization signal. The parameters may include a transmission power split or ratio, a bandwidth, a tone selection, or any combination of these parameters.