Rate Splitting Multiple Access Signal Decoding for Interference Management
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing rate splitting and interference cancellation in multi-user environments, particularly in next-generation radio access technologies like NR, which require improved reliability and low latency for diverse communication scenarios.
Innovation Solution
The implementation of a Rate Splitting Multiple Access (RSMA) scheme, where common and private messages are configured and transmitted based on feedback information, allowing terminals to decode and subtract common messages to recover private messages, enabling efficient resource allocation and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If common message and private message are transmitted simultaneously in multi-user environments, then communication capacity is improved, but interference management complexity increases
Solution Approach 1:
The transmitted message is segmented into two distinct parts: a common message component that contains information shared among multiple users, and a private message component that contains user-specific information. This segmentation allows the receiver to separately decode and process each component, simplifying interference management while maintaining high communication capacity
Solution Approach 2:
The common message component is extracted and identified separately from the private message component in the received signal. By extracting the common message first and decoding it independently, the system reduces the complexity of managing interference between multiple users' private messages
2Reliability
If rate splitting is performed to separate common and private messages, then interference cancellation is improved, but decoding complexity increases
Solution Approach 1:
The common message component is decoded in advance before decoding the private message component. This preliminary decoding action enables the receiver to cancel out the interference from the common message, thereby improving the reliability of private message decoding while managing complexity through a structured two-stage process
3Adaptability or versatility
If multiple terminals are supported in various channel environments, then system versatility is improved, but resource allocation complexity increases
Solution Approach 1:
The system applies different decoding and processing strategies to different terminals based on their specific channel environments. Each terminal's common and private messages are processed with locally optimized parameters, allowing the system to support diverse channel conditions without requiring a single complex resource allocation scheme for all users
Data Source
AI summary
The present disclosure may provide a for receiving, by a terminal, a signal in a wireless communication system. Herein, the method for receiving, by the terminal, the signal may include: receiving common message configuration information and private message configuration information from a base station; receiving a signal including a common message and a private message from the base station; decoding the common message based on the common message configuration information; restoring a frequency signal by using the decoded common message; subtracting the restored frequency signal of the common message from the received signal; and decoding the private message.