EPDCCH Interference Cancellation via Restricted Configuration
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Solution Overview
Problem
In wireless communication systems, especially in multi-cell environments, interference cancellation is challenging due to the complexity of managing and coordinating interference signals across multiple cells, which affects the performance and efficiency of data transmission.
Innovation Solution
A method where a serving cell provides restricted configuration information to a terminal about the enhanced physical downlink control channel (EPDCCH) from a dominant interference cell, allowing the terminal to detect and mitigate interference by using specific parameters such as frequency or time resource regions, DMRS scrambling sequences, and aggregation levels, thereby reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-node coordinated communication is implemented to improve data throughput and SINR, then transmission capacity and power efficiency are improved, but interference management complexity increases
Solution Approach 1:
The patent segments the interference cancellation process by having each node independently detect and cancel interference from specific other nodes based on pre-configured interference relationships. This divides the complex multi-node interference management into manageable individual tasks, reducing overall system complexity while maintaining high throughput benefits
Solution Approach 2:
The patent applies preliminary action by pre-configuring interference cancellation parameters and identifying dominant interference cells before actual data transmission. This allows the terminal to be prepared for interference cancellation in advance, reducing real-time processing complexity while maintaining high data throughput
2Measurement precision
If blind detection is performed to detect EPDCCH in interference environments, then interference detection capability is improved, but detection complexity and time consumption increase
Solution Approach 1:
The patent changes detection parameters by using restricted configuration information about dominant interference cells to guide the blind detection process. Instead of exhaustive blind detection across all possible configurations, the terminal focuses detection efforts on specific parameters related to identified interference cells, reducing complexity while maintaining detection precision
Solution Approach 2:
The patent introduces an intermediary mechanism where the network provides restricted configuration information about interference cells to the terminal. This intermediary information acts as a guide for the blind detection process, reducing the search space and complexity while maintaining detection capability
3Productivity
If restricted configuration information is provided to reduce blind detection complexity, then detection efficiency is improved, but information completeness may be reduced
Solution Approach 1:
The patent applies local quality by providing restricted configuration information that is specifically tailored to the terminal's local situation and the identified dominant interference cells. Rather than providing complete global information about all cells, the patent provides locally relevant interference parameters, reducing information overhead while maintaining detection efficiency
Data Source
AI summary
The present invention relates to a wireless communication system and, more specifically, to a method for an operation of cancelling or mitigating interference, and an apparatus therefor. A method of cancelling or mitigating interference in a wireless communication system performed by a terminal includes receiving, from a serving cell, restricted configuration information of an enhanced physical downlink control channel (EPDCCH) which a dominant interference cell transmits, detecting the EPDCCH using the restricted configuration information of the EPDCCH, and performing an operation of cancelling or mitigating interference for the dominant interference cell using the detected EPDCCH, wherein the restricted configuration information of the EPDCCH includes a restricted set of parameters related to the EPDCCH configurable by the dominant interference cell.