NAICS Interference Cancellation via Segmented Blind Detection
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Solution Overview
Problem
In cellular mobile communication systems, existing methods struggle to effectively control and cancel interference in downlink data reception, particularly in environments with multiple virtual cell identifiers and scrambling identifiers, which affects the performance and complexity of interference management.
Innovation Solution
A method and apparatus for a terminal in a mobile communication system that receives transmission parameters of interferer channels, determines if they support a specific transmission mode, and performs blind detection with virtual cell identifier-scrambling identifier combinations to cancel interference, allowing for effective interference control and suppression with low complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind detection is performed with all virtual cell identifier-scrambling identifier combinations to cancel interference, then interference cancellation performance is improved, but computational complexity increases
Solution Approach 1:
The patent segments the interference cancellation process by dividing all VCID-SCID combinations into multiple groups. The terminal performs blind detection on a first group of combinations, and based on detection results or priority information, selectively performs blind detection on a second group of combinations. This segmentation reduces the number of combinations that require full blind detection, thereby lowering computational complexity while maintaining interference cancellation performance.
Solution Approach 2:
The patent applies preliminary action by using priority information to pre-determine which VCID-SCID combinations should be detected first or with higher priority. The network can configure priority information indicating the importance of different interferer channels, allowing the terminal to perform blind detection on high-priority combinations before low-priority ones. This preliminary prioritization ensures that limited detection resources are allocated to the most critical interference sources.
2Adaptability or versatility
If the terminal performs blind detection on multiple VCID-SCID combinations to handle multiple interferers, then interference control capability is improved, but processing time increases
Solution Approach 1:
The patent introduces dynamics by making the blind detection process adaptive based on detected interference conditions. The terminal dynamically adjusts which VCID-SCID combinations require further blind detection based on initial detection results. If interference from certain combinations is detected, the terminal focuses processing on those combinations; if no interference is detected, the terminal skips further detection on those combinations, thereby reducing processing time while maintaining comprehensive interference control capability.
Solution Approach 2:
The patent segments the set of VCID-SCID combinations into multiple groups for staged processing. The terminal first performs blind detection on a first group of combinations, and based on the results, selectively performs blind detection on a second group of combinations. This segmented approach allows the terminal to handle multiple interferers systematically while avoiding unnecessary processing on combinations that do not require full detection, thus reducing overall processing time.
3Measurement precision
If the network configures multiple virtual cell identifiers and scrambling identifiers for interferers, then interference identification accuracy is improved, but system complexity increases
Solution Approach 1:
The patent segments the configuration management by dividing VCID-SCID combinations into multiple groups that can be configured and managed separately. The network can configure priority information and detection parameters for different groups independently, allowing for systematic management of multiple interferers without overwhelming system complexity. This segmented configuration approach maintains high interference identification accuracy while making the system more manageable.
Solution Approach 2:
The patent applies universality by creating a unified framework that handles multiple VCID-SCID combinations through standardized procedures. The same blind detection mechanism and interference cancellation process are applied universally across different groups of combinations, with the only variation being the prioritization and grouping. This universal approach allows the system to handle multiple interferers with different identifiers through a single, manageable process rather than requiring separate mechanisms for each interferer type.
Data Source
AI summary
The present disclosure relates to a communication technique and a system thereof for fusing, with IoT technology, a 5G communication system for supporting a higher data transmission rate than a beyond 4G system. The present disclosure may be applied to intelligent services (such as smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail business, security and safety related services, etc.). The present disclosure relates to a method for receiving downlink data of a terminal in a wireless communication system, and suggests a method and an apparatus for receiving downlink data, the method comprising: a step for checking a transmission parameter regarding data being transmitted from an interference cell; a step for determining, on the basis of the transmission parameter, whether or not an interference signal exists; a step for determining, on the basis of any one of the transmission parameter and the determination on whether or not an interference signal exists, whether or not network assisted interference cancellation and suppression (NAICS) technology is applied; and a step for decoding the downlink data on the basis of the determination on whether or not the NAICS technology is applied.