User Equipment Interference Cancellation Using Non-Serving Cell Information
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly LTE, face challenges in managing downlink interference, which affects the decoding of serving cell signals and overall channel quality, as the demand for mobile broadband access increases.
Innovation Solution
A method where user equipment (UE) acquires information about interfering non-serving cells from a serving evolved Node B, using this information to perform interference cancellation, demodulation, or improve channel quality indicators (CQI), thereby enhancing signal decoding and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment receives information about non-serving cells from serving eNB, then interference mitigation performance is improved, but device complexity increases
Solution Approach 1:
The serving eNB provides interference information about non-serving cells to the UE in advance, before the UE needs to decode serving cell signals. This preliminary provision of interference characteristics (such as resource allocation, modulation schemes, and cell identifiers) allows the UE to prepare interference cancellation parameters ahead of time, improving decoding reliability while managing complexity through pre-computation.
Solution Approach 2:
The patent introduces an intermediary information structure that carries interference characteristics from the serving eNB to the UE. This intermediary contains organized data about non-serving cells including resource block allocations, reference signal patterns, and cell-specific parameters, which mediates the complex interaction between multiple cells and enables the UE to perform interference mitigation without directly processing all raw interference signals.
2Reliability
If interference cancellation is performed using non-serving cell information, then channel quality is improved, but loss of time in processing increases
Solution Approach 1:
The serving eNB provides interference information about non-serving cells to the UE in advance, before the UE needs to decode serving cell signals. This preliminary provision of interference characteristics (such as resource allocation, modulation schemes, and cell identifiers) allows the UE to prepare interference cancellation parameters ahead of time, improving decoding reliability while managing complexity through pre-computation.
Solution Approach 2:
The patent applies partial interference cancellation by focusing only on the most significant interfering non-serving cells rather than attempting to cancel all interference sources. The UE selectively processes interference from cells with the strongest impact on serving cell reception, achieving sufficient channel quality improvement while reducing processing time by ignoring weaker interference sources.
3Reliability
If detailed transmission characteristics of non-serving cells are provided, then interference mitigation effectiveness is improved, but loss of information overhead increases
Solution Approach 1:
The patent provides detailed transmission characteristics only for specific non-serving cells that are identified as significant interferers, rather than providing information about all non-serving cells. The serving eNB selectively includes interference information based on local conditions such as neighbor cell relationships, load conditions, and measured interference levels, thereby improving interference mitigation effectiveness while minimizing information overhead by focusing on relevant local interference sources.
Data Source
AI summary
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE that acquires information regarding an interfering non-serving cell and uses the information to improve decoding of serving cell signals. The method includes receiving, from a serving evolved Node B (eNB), information that includes one or more transmission characteristics of at least one non-serving cell and performing at least one of interference cancellation, demodulation, or provides an improved channel quality indicator (CQI) based on the received information.