Dynamic Interferer Characterization via Configuration Indications
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Solution Overview
Problem
Current NAICS wireless devices face challenges in efficiently identifying and canceling interfering physical channels due to the complexity of blind detection, especially with multiple interfering cells and varying interference patterns, which increases complexity and power requirements.
Innovation Solution
The method involves constructing and transmitting configuration indications that include physical cell identity, antenna port information, and CSI-RS identification to help wireless devices identify interfering physical channels, allowing for more accurate power ranking and reduced overhead in signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind detection is used to determine interference parameters, then the wireless device can identify interfering cells, but the complexity increases and reliability degrades with more parameters
Solution Approach 1:
The network node performs preliminary actions by determining interference parameters (CRS configuration, power, spatial filter) before the wireless device performs detection. This pre-determination reduces the parameter space the wireless device must blindly search, thereby reducing complexity while maintaining reliability.
Solution Approach 2:
The network node acts as an intermediary by providing assistance information that mediates between the complex interference environment and the wireless device's detection capability. This intermediary information reduces the burden on the wireless device while improving detection reliability.
2Loss of information
If assistance signaling includes only physical cell ID, then signaling overhead is reduced, but it is insufficient for NAICS devices with rapidly varying PDSCH
Solution Approach 1:
The assistance information structure is designed to be universal and multi-functional, supporting both CRS-based interference cancellation and PDSCH-based NAICS. By incorporating CRS configuration, power, and spatial filter information, a single assistance message serves multiple interference mitigation functions, reducing the need for separate signaling.
Solution Approach 2:
The invention changes the parameters included in assistance signaling from just physical cell ID to a comprehensive set including CRS configuration, power, and spatial filter information. This parameter expansion enables the signaling to adequately describe dynamic interferers while maintaining efficient overhead through compact representation.
3Adaptability or versatility
If wireless devices track multiple cells for NAICS assistance, then interference cancellation capability improves, but device complexity increases
Solution Approach 1:
The network node performs preliminary determination of interference parameters for multiple cells before the wireless device processes them. This pre-processing reduces the computational burden on the device, allowing it to handle multiple cells without proportional complexity increases.
Solution Approach 2:
The network node provides self-service by autonomously determining and providing interference parameters, reducing the need for complex device-side processing. The device benefits from pre-processed information that requires minimal further processing.
4Object-affected harmful factors
If advanced receivers with nonlinear processing are used, then interference suppression improves, but power consumption increases
Solution Approach 1:
The network node performs preliminary determination of interference parameters including power and spatial filter information. This pre-determination reduces the computational complexity of nonlinear processing required at the device, thereby reducing power consumption while maintaining interference suppression effectiveness.
Solution Approach 2:
By providing precise interference parameters through assistance signaling, the invention changes the nature of the reception task from complex blind adaptation to targeted parameter-based processing. This reduces the computational burden and associated power consumption of advanced receivers.
Data Source
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AI summary
In one example embodiment, a method for identifying interfering physical channel configurations and cell-specific reference signals (CRSs) for the characterization of dynamic interferers includes constructing configuration indications. Each configuration indication may include a physical cell identity, antenna port information for a cell-specific reference signal (CRS), and an identification of a channel state information reference signal (CSI-RS). First and second configuration indications may be transmitted to a first wireless device. A first physical channel may be transmitted to the first wireless device. A second physical channel transmitted from a second network node may interfere with the first physical channel and be identifiable at least in part based on the first and second configuration indications. The first and second configuration indications may include a same physical cell identity and same antenna port information.