Wireless Signal Overlap Management via Terminal NLP Capability Detection
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Solution Overview
Problem
Current wireless communication systems, particularly 5G, face challenges in efficiently managing signal transmission and reception due to the complexity of nonlinear precoding (NLP) and modulo operations in time-frequency resource regions, which affects interference cancellation and data channel multiplexing.
Innovation Solution
A method and apparatus for determining and managing signal overlapping in wireless communication systems by assessing terminal capabilities for NLP or modulo operations, allowing for dynamic adjustment of signal transmission and reception strategies, including rate matching and multiplexing types, to optimize resource allocation and interference cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nonlinear precoding (NLP) and modulo operations are implemented in 5G wireless communication systems, then interference cancellation capability and data traffic management are improved, but system complexity and difficulty of signal processing increase
Solution Approach 1:
The patent applies preliminary action by performing modulo operations and interference cancellation processing at the transmitter side before signal transmission. The base station pre-processes the signal by applying NLP and modulo operations, so that the terminal receives a signal with reduced interference without needing to perform complex cancellation operations itself. This shifts the computational complexity to the base station, which has more processing resources available.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the modulo operation parameters and precoding matrices based on channel conditions and terminal capabilities. The base station determines whether each terminal supports NLP or modulo operations and adapts the signal processing parameters accordingly, allowing the system to optimize between performance and complexity based on specific operational conditions.
2Productivity
If signal overlapping transmission is performed in time-frequency resource regions, then resource utilization efficiency is improved, but interference management difficulty and signal reception complexity increase
Solution Approach 1:
The patent applies segmentation by dividing the time-frequency resource region into multiple segments and transmitting different signals in different segments. The base station determines which signals are overlapping-transmitted and segments the resource allocation accordingly, allowing terminals to process signals in manageable segments rather than dealing with fully overlapping complex signals across the entire resource region.
Solution Approach 2:
The patent introduces an intermediary mechanism through the base station's intelligent determination and signaling system. The base station acts as an intermediary that identifies overlapping signals, determines the appropriate handling strategy (NLP or modulo operation), and communicates this information to terminals via downlink signaling. This intermediary coordination simplifies terminal reception complexity by providing advance information about signal overlapping patterns.
3Adaptability or versatility
If terminal capability assessment for NLP and modulo operations is performed, then adaptability and optimized signal processing are improved, but overhead signaling and processing time increase
Solution Approach 1:
The patent applies preliminary action by having terminals report their capability information (whether they support NLP or modulo operations) in advance during the capability exchange phase. The base station stores this capability information and uses it for future signal processing decisions, avoiding the need to perform capability assessment repeatedly for each transmission, thus reducing ongoing processing time and overhead.
Data Source
AI summary
A method of transmitting and receiving a signal, by a base station (BS), in a wireless communication system is provided. The method includes determining whether each of at least one terminal connected to the BS supports nonlinear precoding (NLP) or a modulo operation, determining a plurality of signals that are overlapping-transmitted in a time-frequency resource region from among a control signal, a reference signal (RS), and a data signal transmitted from the BS, based on whether the at least one terminal supports the NLP or the modulo operation, and transmitting, to each of the at least one terminal, information about whether the NLP or the modulo operation is performed in a resource where the plurality of signals are transmitted.