NAICS Terminal Interference Cancellation via TM Subset Segmentation
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Solution Overview
Problem
Current Network Assisted Interference Cancellation and Suppression (NAICS) methods face challenges in efficiently canceling interference without increasing the blind detection complexity and hardware costs of terminals, particularly for low-complexity transmission modes (TMs), due to dynamic scheduling and high overhead in acquiring UE-specific assisted information.
Innovation Solution
The method involves terminals reporting their NAICS capability information to the network, allowing the network to issue assisted signaling based on this information and interference data, and dividing TMs into subsets to optimize interference cancellation within existing hardware configurations, reducing the need for high-complexity blind detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UE-specific assisted information is acquired through terminal blind detection, then the terminal can obtain dynamically changing information, but the blind detection complexity increases significantly
Solution Approach 1:
The patent segments the 10 transmission modes into multiple subsets (e.g., first subset with lower complexity TMs, second subset with higher complexity TMs). The terminal only performs blind detection on TMs within its capability subset, while the network indicates which subset the interfering UE uses. This segmentation allows the terminal to acquire dynamically changing UE-specific assisted information without having to blindly detect all possible TMs, thereby reducing blind detection complexity while maintaining adaptability.
2Quantity of substance
If high-layer signaling is used to notify assisted information, then the overhead is reduced for cell-specific information, but the interaction delay increases and it is not suitable for dynamic UE-specific information
Solution Approach 1:
The patent divides assisted information into two categories: cell-specific assisted information (notified via high-layer signaling with reduced overhead) and UE-specific assisted information (acquired through blind detection within capability subsets). This segmentation allows efficient handling of both static and dynamic information types, reducing overall overhead while avoiding the delay issues of using high-layer signaling for dynamic information.
Solution Approach 2:
The network introduces an intermediary indication mechanism that tells the terminal which TM subset the interfering UE is using. This intermediary information guides the terminal's blind detection process, reducing the search space without requiring direct high-layer signaling of all UE-specific parameters, thereby balancing overhead and delay considerations.
3Adaptability or versatility
If the terminal supports blind detection for all TMs, then all interference scenarios can be handled, but the hardware configuration cost increases
Solution Approach 1:
The patent segments TMs into capability subsets based on terminal hardware capabilities. Terminals only need to implement blind detection for TMs within their subscribed subset (e.g., lower complexity TMs for cost-sensitive devices). The network manages interference scenarios by indicating which subset the interfering UE uses, ensuring that the terminal can handle relevant interference scenarios without requiring expensive hardware for all possible TMs.
4Adaptability or versatility
If TM 4 with four CRS ports is used, then scheduling flexibility is improved, but the blind detection count increases to 80
Solution Approach 1:
The patent segments TMs into subsets where TM 4 with four CRS ports is placed in a separate higher-complexity subset. Terminals with limited capabilities only perform blind detection on lower-complexity TMs (subset 1), while terminals with higher capabilities can handle the full range including TM 4 with four CRS ports (subset 2). The network indicates which subset the interfering UE uses, allowing scheduling flexibility to be maintained when needed while avoiding excessive blind detection complexity for terminals that don't require it.
Data Source
AI summary
The disclosure discloses a Network Assisted Interference Cancellation and Suppression (NAICS) method, apparatus, system and related device, for NAICS based on existing hardware configuration of a terminal. A first NAICS method includes the following steps. NAICS capability information reported by a User Equipment (UE) is received. NAICS assisted signalling is issued to the UE according to the NAICS capability information and/or interference information of a neighbouring base station. A second NAICS method includes the following steps. Transmission Modes (TM) are divided into N TM subsets, each TM subset including at least one TM, N being a natural number. A neighbouring base station is notified of a TM subset scheduled for an interfering UE, wherein the interfering UE includes a UE located at the edge of a coverage area of the neighbouring base station, and the notified TM subset does not include a high-complexity TM.