Reference Signal Index Modulation Coding for Reliable Control Bits
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Solution Overview
Problem
Wireless communication systems face challenges in reliably transmitting information bits using index modulation schemes, particularly in achieving high reliability and low latency, as existing methods may not meet the reliability targets for certain types of information bits.
Innovation Solution
The implementation of enhanced reliability multimode reference signal index modulation schemes, which involve coding information bits before transmission using techniques like polar coding, convolutional coding, and repetition coding, and interleaving them across reference signal resources to enhance transmission reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If index modulation schemes are used to transmit information bits, then resource efficiency is improved, but transmission reliability deteriorates
Solution Approach 1:
The information bits are divided into multiple groups, with different groups assigned different reliability levels. This allows the system to apply different coding strategies to different bit groups, ensuring that critical information receives enhanced protection while maintaining overall resource efficiency.
Solution Approach 2:
The system dynamically adjusts coding parameters such as coding rate and modulation order based on channel conditions and reliability requirements. By changing these parameters adaptively, the system can meet varying reliability targets while optimizing resource utilization.
2Reliability
If coding techniques are applied to information bits, then transmission reliability is improved, but system complexity increases
Solution Approach 1:
The coding scheme is designed to be dynamically configurable, allowing the system to adjust the level of coding complexity based on actual transmission conditions. When channel conditions are good, simpler coding can be used; when conditions deteriorate, more robust coding is activated, thus managing complexity adaptively.
Solution Approach 2:
Different coding techniques and complexity levels are applied to different groups of information bits based on their specific reliability requirements. Critical bits receive more sophisticated coding protection, while less critical bits use simpler coding, thereby optimizing the overall complexity-reliability trade-off.
3Productivity
If reference signal resources are used for information transmission, then spectral efficiency is improved, but error detection capability deteriorates
Solution Approach 1:
Error detection codes are pre-appended to information bits before they are mapped to reference signal resources. This preliminary error protection ensures that even when reference signals are repurposed for data transmission, the system maintains adequate error detection capability without sacrificing spectral efficiency.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described that support communication of information buts based on reference signal index modulation (RS-IM). A base station and a UE may transmit a number of downlink and uplink information bits (e.g., downlink control bits, uplink control bits) using index modulation schemes applied on references signals. A base station and a UE may transmit reference signal transmissions using reference signal index modulation, in which a set of information bits may be encoded using one or more coding techniques, in conjunction with RS-IM techniques, to enhance reliability of some or all of the information bits. Error detection bits may be added to the information bits, and included when coding is performed. Coding may include channel coding, repetition of reference signals for combining at a receiving device, or any combinations thereof.