User Equipment Downlink Signal Decoding Overlapping Resources
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Solution Overview
Problem
In wireless communications, especially in 5G systems, the coexistence of multiple systems within the same bandwidth, such as LTE and NB-IoT, leads to performance degradation due to overlapping time-frequency resources, where existing methods like network scheduling sacrifice performance and puncturing discards data, necessitating a more effective method to manage and decode signals.
Innovation Solution
User equipment (UE) receives configuration information about the secondary system from the base station, determines and processes time-frequency resources to isolate and decode downlink signals from the secondary system, allowing for improved decoding performance by utilizing pre-defined information and configuration details like reference signal power and cell ID, thereby optimizing resource usage and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple systems operate in the same bandwidth with overlapping time-frequency resources, then system versatility and service coverage are improved, but signal interference and decoding performance deteriorate
Solution Approach 1:
The patent segments the time-frequency resources by identifying and separating resources occupied by the second system from those available for the first system. The UE determines which resource blocks are occupied by the second system based on configuration information, effectively dividing the total resource pool into occupied and available segments for decoding operations.
Solution Approach 2:
The patent extracts and removes the interference caused by the second system from the downlink channel signals. By identifying time-frequency resources occupied by the second system and excluding them from the decoding process, the UE effectively takes out the harmful interference components, improving the quality of signals from the first system.
2Ease of operation
If network scheduling is used to manage co-existing systems, then resource allocation flexibility is improved, but system performance is sacrificed
Solution Approach 1:
The patent applies preliminary action by having the base station pre-configure information about the second system's time-frequency resources before the UE performs decoding. This advance provision of resource occupation information allows the UE to proactively avoid interfering resources, eliminating the need for reactive network scheduling adjustments and maintaining high system performance.
3Device complexity
If puncturing method is used to handle overlapping resources, then interference management is simplified, but data is discarded and performance is reduced
Solution Approach 1:
The patent converts the harmful effect of resource overlap into a beneficial situation by using the known configuration information of the second system to identify exactly which resources are occupied. Instead of blindly puncturing and losing data, the UE intelligently avoids only the necessary occupied resources while preserving all available data from the first system, transforming the interference problem into a precise resource avoidance strategy.
Data Source
AI summary
Methods and UE for receiving downlink channel signals are provided, wherein, a method for receiving DL channel signal, includes: a user equipment receives configuration information of a second system on a first system, wherein the time-frequency resource of the first system and the time-frequency resource of the second system are overlapped. the UE determines one or more time-frequency resources for receiving downlink signals. The UE receives the downlink signals at the time-frequency resources; and processes the downlink signals according to the configuration information of the second system. The method and equipment provided could be used for receiving methods and apparatus in a multiple-system co-existence system, and could enhance the system performance.