Interference Signal Modulation Order Indication via Serving Signal
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Solution Overview
Problem
In cellular wireless mobile communication systems, the increase in interference signals leads to a deterioration of system performance due to the need for direct signaling of modulation order, resulting in increased signaling overhead for interference aware communication or interference cancellation.
Innovation Solution
A method and apparatus that allow a user equipment (UE) to indirectly determine the modulation order of an interference signal by generating and transmitting modulation order information within a resource allocated to the UE, enabling efficient interference awareness or cancellation without explicit indication from the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct signaling of modulation order of interference signal is used, then interference awareness accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent uses the modulation order of the serving signal as an intermediary to indirectly indicate the modulation order of the interference signal. Instead of directly signaling interference modulation order, the base station transmits the serving signal's modulation order, which the UE then uses to infer the interference signal's modulation order, thereby reducing signaling overhead while maintaining interference awareness accuracy
Solution Approach 2:
The patent applies copying by using the serving signal's modulation order information as a proxy or copy for the interference signal's modulation order. The UE receives and processes the serving signal's modulation order, then uses this copied information to understand the interference signal characteristics without requiring separate direct signaling
2Measurement precision
If direct indication of interference signal modulation order is transmitted, then reception accuracy is improved, but system performance deteriorates due to increased overhead
Solution Approach 1:
The serving signal's modulation order information serves multiple functions: it acts as both the actual serving signal parameter and as an indirect indicator for the interference signal's modulation order. This multi-functionality allows the system to maintain reception accuracy while avoiding the overhead of separate interference signaling, thus preserving system performance
Solution Approach 2:
The serving signal modulation order acts as a mediator that carries dual information - the actual serving signal characteristics and the interference signal characteristics. This intermediary approach enables the UE to achieve accurate reception without the system performance degradation caused by increased signaling overhead
Data Source
AI summary
Methods and a base station are provided for transmitting a serving signal to a User Equipment (UE) by the base station. The method includes generating modulation order information for determining a modulation order of an interference signal, and transmitting the serving signal with the modulation order information in a resource allocated to the UE.