Adaptive MCS Coding Configurations for Physical Layer Security
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Solution Overview
Problem
Existing wireless communication systems face challenges in ensuring perfect physical layer (PHY) security, as instantaneous secrecy rates may be lower than target secrecy rates, leading to information leakage to eavesdroppers, and current security measures fail to guarantee secure data transmission.
Innovation Solution
A transmitting device modulates data using a configuration based on a target secure block error rate (BLER) and selects an appropriate modulation and coding scheme (MCS) to achieve the target secrecy BLER, reducing secrecy outage probability and improving transmission security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional modulation and coding schemes are used to maximize data rate, then productivity is improved, but physical layer security deteriorates due to information leakage to eavesdroppers
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the modulation and coding scheme (MCS) based on channel state information and security requirements. The system changes modulation order, coding rate, and constellation mapping parameters to achieve a target secrecy rate while maintaining acceptable data throughput. This resolves the contradiction by making the transmission parameters adaptive rather than fixed, allowing optimization of both security and productivity based on real-time conditions.
Solution Approach 2:
The patent implements dynamics by introducing adaptive MCS selection that responds to changing channel conditions and security demands. The system dynamically switches between different modulation schemes (e.g., QAM orders) and coding rates based on instantaneous channel state information, ensuring that the secrecy rate meets the target requirement while maximizing data rate when conditions permit. This dynamic adjustment mechanism resolves the trade-off between security and productivity.
2Productivity
If higher modulation order is used to increase data rate, then productivity is improved, but secrecy rate deteriorates leading to increased information leakage
Solution Approach 1:
The patent applies parameter changes by selectively adjusting the modulation order and constellation mapping based on the instantaneous channel state and security requirements. When channel conditions are favorable, higher modulation orders are used to maximize data rate. When security is compromised or channel conditions are poor, the system switches to lower modulation orders or alternative constellation mappings that provide better security guarantees. This selective parameter adjustment resolves the contradiction between data rate and secrecy rate.
3Device complexity
If fixed MCS is used for simplicity, then device complexity is reduced, but adaptability to channel conditions and security requirements deteriorates
Solution Approach 1:
The patent implements dynamics by transitioning from fixed MCS to adaptive MCS selection based on channel state information. The system uses feedback mechanisms to monitor channel conditions and automatically adjusts the modulation and coding scheme accordingly. This dynamic approach provides adaptability to varying channel conditions and security requirements while maintaining manageable complexity through standardized MCS tables and predefined adjustment rules.
Solution Approach 2:
The patent applies feedback by incorporating channel state information feedback into the MCS selection process. The receiver provides feedback about channel conditions, and the transmitter uses this information to select appropriate MCS parameters. This feedback mechanism enables the system to adapt to changing conditions without requiring overly complex decision-making algorithms, thus maintaining feasibility while improving adaptability.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. In a wireless communications system, a transmitting device (e.g., a network node, a user equipment (UE)) may modulate data using a configuration that corresponds to a particular modulation and coding scheme (MCS) or a modulation order that represents a mapping or bundling of a set of constellation points to a single point for transmitting the data in a message. In some examples, the configuration for modulating the data may be based on a target secure block error rate (BLER). For example, the transmitting device may select an MCS to achieve the target secrecy BLER from an MCS table or from a set of MCSs indicated to the transmitting device. In some examples, the transmitting device may determine an MCS for modulating the data to achieve the target secure BLER based on an indicated MCS and an delta MCS.