Network-Assisted Interference Cancellation for Multi-Service Wireless
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Solution Overview
Problem
Current wireless communication systems face challenges in managing interference from potentially interfering signals across different communication services in neighbor cells, which affects the quality of service and spectral efficiency, especially in advanced technologies like LTE.
Innovation Solution
The method involves determining specific system parameters for each type of communication service in neighbor cells and using this information to perform interference management, either by canceling or suppressing interference, through signaling between user equipment (UE) and evolved Node B (eNB), employing techniques like interference suppression and cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If interference management is performed for multiple communication services in neighbor cells, then spectral efficiency and network performance are improved, but device complexity and processing requirements increase
Solution Approach 1:
The interference management process is segmented by communication service type. The system identifies and processes interference from different services (e.g., eMBMS, MBSFN, unicast) separately, with service-specific parameters and handling procedures. This segmentation allows complex interference to be managed through structured, manageable categories rather than as a monolithic problem.
Solution Approach 2:
The system changes parameters based on service type, determining different information requirements and processing methods for different communication services. Parameters such as interference cancellation coefficients, suppression thresholds, and processing priorities are adjusted according to the specific service characteristics, enabling optimized performance without uniform complex processing for all services.
2Measurement precision
If service-specific interference management is implemented, then interference cancellation accuracy is improved, but signaling overhead and processing requirements increase
Solution Approach 1:
Interference management parameters and processing methods are tailored to local service characteristics. Each communication service type receives service-specific treatment with appropriate parameters (e.g., different cancellation coefficients for eMBMS versus unicast), rather than applying uniform processing. This local quality approach improves accuracy while avoiding unnecessary processing for services that don't require certain interventions.
Solution Approach 2:
The system applies partial interference management actions appropriate to each service type rather than attempting complete cancellation for all services uniformly. For services where complete cancellation is not feasible or necessary, the system applies targeted suppression sufficient to achieve acceptable performance, avoiding excessive processing overhead.
3Adaptability or versatility
If multiple communication services are supported simultaneously, then network versatility is improved, but interference management difficulty increases
Solution Approach 1:
The interference management system is designed with multi-functionality to handle multiple communication service types through a unified framework. The same basic interference management architecture processes interference from eMBMS, MBSFN, and unicast services, with service-specific parameters configured within the universal structure. This universality enables versatile network support without proportionally increasing overall system complexity.
Solution Approach 2:
The system dynamically adapts its interference management behavior based on the detected service type. When different communication services are present, the system switches between appropriate processing methods and parameters for each service, enabling versatile multi-service support through dynamic rather than static processing logic.
Data Source
AI summary
Certain aspects of the present disclosure relate to methods and apparatus for network assisted interference cancellation (IC) and interference suppression (IS) for multiple services. According to aspects a user equipment (UE) may determine information regarding system parameters for one or more types of communications services used to transmit potentially interfering signals in one or more neighbor cells, wherein a type of the information determined depends on the type of communications service. The UE may perform interference management using the determined information to cancel or suppress interference caused by the potentially interfering signals.