Interference Cancellation for Multi-System Wireless Throughput
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Solution Overview
Problem
The development of wireless communication systems, such as LTE, LTE-A, eMTC, and 5G NR, faces throughput reductions when multiple systems are supported within a limited frequency band due to interference, necessitating measures to minimize these reductions while accommodating more users and data services.
Innovation Solution
An apparatus and method that apply interference cancellation techniques between wireless communication systems, using a transceiver and processor to schedule and perform interference cancellation processes on integrated signals from multiple wireless communication systems, thereby reducing interference and efficiently using frequency and time resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple wireless communication systems are supported together in a limited frequency band, then the quantity of wireless communications is increased, but the throughput of each wireless communication system decreases due to interference
Solution Approach 1:
The patent applies interference cancellation techniques that convert the harmful interference between co-channel wireless communication systems into a benefit by using the interfering signals to cancel each other out. The system performs first and second interference cancellation processes where signals from different systems are processed and combined to eliminate mutual interference, thereby maintaining high throughput for each system while supporting multiple systems in the same frequency band
Solution Approach 2:
The patent segments the interference cancellation process into distinct first and second interference cancellation operations. The first IC process handles interference from a first wireless communication system, while the second IC process handles interference from a second wireless communication system. This segmentation allows the system to systematically address and cancel interference from multiple sources independently, resolving the contradiction between supporting multiple systems and maintaining individual throughput
2Productivity
If interference cancellation processes are performed for multiple wireless communication systems, then the throughput of each system is maintained, but the complexity of signal processing increases
Solution Approach 1:
The patent implements a scheduled interference cancellation approach where the apparatus performs first and second IC processes selectively based on scheduling decisions rather than continuously for all systems. The scheduler determines when and which interference cancellation processes to execute, performing partial interference cancellation actions only when necessary to maintain throughput, thereby reducing overall processing complexity while preserving performance
Data Source
AI summary
Provided are an apparatus for supporting a plurality of wireless communication systems and an operating method of the same. The apparatus receives an integrated signal including a first wireless communication system signal and a second wireless communication system signal assigned to a certain frequency band, performs first processing on the integrated signal, performs second processing on the integrated signal, is scheduled to perform at least one of first interference cancellation (IC) process of canceling interference of the first wireless communication system signal from the integrated signal based on the signal on which first processing is performed or second IC process of canceling interference of the second wireless communication system signal from the integrated signal based on the signal on which second processing is performed, and performs at least one of the first IC process or the second IC process based on the scheduling.