Base-Station NAICS Assistance for Interference Mitigation
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Solution Overview
Problem
Advanced receivers in communication systems require knowledge of interfering signals to mitigate interference, leading to increased signaling overhead and computation burden, especially when little information is available from the base-station apparatus to the terminal apparatus.
Innovation Solution
The system reduces signaling overhead by allowing the base-station apparatus to transmit NAICS assistance information, which includes parameters for interfering signal cancellation, enabling the terminal apparatus to estimate and mitigate interference effectively without extensive computation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base-station apparatus transmits knowledge or information about an interfering signal to a terminal apparatus, then interference mitigation capability is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential parameters needed for interference mitigation (such as interfering signal power, channel information, and resource allocation) from the complete interfering signal description, transmitting only these critical elements to reduce signaling overhead while maintaining effective interference cancellation capability at the terminal apparatus
Solution Approach 2:
The patent transforms the interfering signal information into optimized parameter representations (such as using channel state information indicators, power ratios, and resource block indicators) that convey the necessary interference characteristics with minimal signaling bits, thereby reducing overhead while preserving mitigation effectiveness
2Quantity of substance
If there is little knowledge or information about the interfering signal from the base-station apparatus to the terminal apparatus, then signaling overhead is reduced, but the computation amount of the terminal apparatus increases
Solution Approach 1:
The base-station apparatus performs preliminary processing of interfering signal information, pre-calculating and preparing the essential parameters (such as channel estimates, power levels, and resource allocations) before transmission to the terminal apparatus. This preliminary action reduces the computational burden at the terminal by providing ready-to-use interference characteristics that require minimal local processing
Solution Approach 2:
The patent introduces an intermediary information structure that bridges the gap between complete interfering signal knowledge and minimal information transmission. This intermediary format includes selectively transmitted parameters (such as channel state indicators and power ratios) that enable the terminal apparatus to reconstruct sufficient interference models without requiring full signal knowledge or extensive computation
Data Source
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AI summary
By effective knowledge or information about an interfering signal, interference is mitigated. A base-station apparatus communicating with a terminal apparatus includes a higher layer processing circuitry that configures, to the terminal apparatus, CRS assistance information used by the terminal apparatus to mitigate interference from a cell-specific reference signal, in which in a case where a predetermined parameter including information about a DL/UL subframe configuration and information about a MBSFN subframe is configured, the higher layer processing circuitry does not configure the CRS assistance information to the terminal apparatus.