Resynchronization Signal Energy Offsets for Low-Overhead UE Measurements
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing network resources and reducing overhead associated with signaling energy levels for resynchronization signals (RSS) in neighbor cells, particularly for low-power or bandwidth-limited user equipment (UEs) that enter sleep modes, leading to synchronization delays and increased resource usage.
Innovation Solution
The system provides signaling of an energy level for RSSs relative to a cell-specific reference signal (CRS) using offsets, allowing for reduced overhead and improved precision through quantized offsets or explicit signaling, enabling combined RSS-based and CRS-based measurements for enhanced radio resource management (RRM).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If explicit signaling of RSS energy level is used, then measurement precision is improved, but signaling overhead increases
Solution Approach 1:
The patent changes the parameter representation from absolute RSS energy level to a relative offset from CRS energy level. This parameter transformation reduces the signaling overhead while maintaining measurement precision, as the offset requires fewer bits to represent the full range of possible RSS energy levels compared to signaling absolute values.
Solution Approach 2:
The patent uses a simplified signaling approach by indicating only the offset rather than the complete RSS energy level information. This 'cheap' signaling method consumes fewer network resources and reduces overhead while still enabling accurate RRM measurements through the offset information combined with CRS-based measurements.
2Measurement precision
If RSS configuration signaling is performed with high detail, then measurement accuracy is improved, but resource overhead increases
Solution Approach 1:
The patent transforms the signaling approach by changing from detailed absolute RSS energy level indication to a compact offset parameter relative to CRS. This parameter change maintains measurement accuracy because the offset can be combined with CRS measurements to derive accurate RSS levels, while significantly reducing the quantity of signaling resources required.
Solution Approach 2:
The patent introduces CRS-based measurement as an intermediary mechanism. Instead of directly signaling complete RSS information, the system uses CRS as a reference point and signals only the offset, allowing the UE to compute RSS energy level indirectly. This intermediary approach reduces signaling overhead while preserving measurement accuracy.
3Loss of time
If comprehensive RSS information is signaled, then synchronization efficiency is improved, but device complexity increases
Solution Approach 1:
The patent changes the information parameter from comprehensive RSS energy level to a simplified offset from CRS. This reduction in parameter complexity decreases UE processing requirements while maintaining synchronization efficiency, as the offset information is sufficient when combined with existing CRS measurement capabilities.
Solution Approach 2:
The patent enables the UE to self-determine the complete RSS energy level information by combining the signaled offset with its own CRS-based measurements. This self-service approach reduces the burden on the network to provide comprehensive RSS information while maintaining synchronization efficiency, as the UE autonomously computes the required values using its existing measurement functions.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive information indicating an offset of an energy level of a resynchronization signal (RSS) of a neighbor cell relative to a cell-specific reference signal (CRS) of the neighbor cell; and perform a measurement based at least in part on the offset. Numerous other aspects are provided.