Measurement Restriction for Neighbor Cell CRS Muting
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Solution Overview
Problem
In wireless communication networks with Cell Reference Signal (CRS) muting enabled in some cells and disabled in others, ensuring accurate neighbor cell measurements across correct bandwidths is challenging, as existing solutions lead to frequent System Information updates and do not restrict measurement bandwidths effectively.
Innovation Solution
The method involves determining neighbor cells capable of CRS muting and transmitting measurement restriction information to terminal devices, restricting Radio Resource Management (RRM) measurements to specific predetermined physical resources, such as central 6-PRB or 24-PRB, to ensure accurate measurements without frequent System Information updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement restriction information is transmitted to restrict RRM measurements to specific bandwidths, then measurement accuracy is improved, but system complexity increases due to additional signaling
Solution Approach 1:
The patent changes the parameter of measurement bandwidth by transmitting measurement restriction information that specifies particular bandwidths (e.g., 6-PRB or 24-PRB) for RRM measurements. This parameter change ensures UEs measure neighbor cells on correct bandwidths, improving measurement accuracy when CRS muting is enabled in some cells but not others
Solution Approach 2:
The patent segments the cell bandwidth into specific measurement bandwidths by restricting RRM measurements to particular physical resource blocks. Instead of allowing measurements across the full cell bandwidth, the system divides the bandwidth and specifies which segments (6-PRB, 24-PRB) should be used for measurements, ensuring accuracy without requiring full bandwidth measurement
2Reliability
If RRM measurements are performed across full cell bandwidth, then measurement coverage is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by restricting RRM measurements to specific bandwidths (6-PRB or 24-PRB) rather than requiring measurements across the full cell bandwidth. This partial measurement approach provides sufficient coverage for neighbor cell detection and handover decisions while significantly reducing the power consumption required for wideband measurements
3Object-generated harmful factors
If CRS muting is enabled in some cells to reduce interference, then interference levels decrease, but measurement accuracy deteriorates due to bandwidth mismatches
Solution Approach 1:
The patent changes the measurement bandwidth parameter to match the CRS transmission bandwidth in cells with CRS muting enabled. By transmitting measurement restriction information specifying 6-PRB or 24-PRB bandwidths, the system ensures UEs perform measurements on the correct bandwidth where CRS is always transmitted, maintaining measurement accuracy while allowing CRS muting to reduce interference in other bandwidth regions
Data Source
AI summary
Embodiments of the present disclosure provide methods, devices and a computer readable medium for a restriction on a measurement for a neighbor cell. According to a method implemented by a network device in a communication system, the network device determines a neighbor cell on a frequency layer capable of cell reference signal (CRS) muting. A cell reference signal in the neighbor cell is transmitted on a predetermined physical resource if the neighbor cell enables CRS muting. In response to the determination, the network device transmits measurement restriction information to a terminal device in a cell of the network device. The measurement restriction information indicates that a radio resource management (RRM) measurement for any neighbor cell on the frequency layer is restricted to be performed on the predetermined physical resource. The embodiments of the present disclosure improve a measurement for a neighbor cell.