Control Information MCS Selection for Reliable Sidelink Multiplexing
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Solution Overview
Problem
Existing wireless communication systems face challenges in improving the reliability and reducing errors of control information multiplexed on data channels, particularly in sidelink communications, where unequal link budgets and error protection are common, and control information needs to reach unintended receivers for interference management.
Innovation Solution
The method involves determining a modulation and coding scheme (MCS) for control information based on spectral efficiency associated with data transmission, allowing for different MCS selection for control information compared to data, ensuring reliable transmission to both intended and unintended receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same MCS is used for both control information and data transmission, then device complexity is reduced, but reliability of control information deteriorates
Solution Approach 1:
The patent segments the MCS selection process into two independent parts: one for data transmission and another for control information transmission. The apparatus determines a first MCS for data based on channel conditions, then separately determines a second MCS for control information based on the first MCS and additional factors. This segmentation allows each MCS to be optimized for its specific purpose, improving control information reliability without excessive complexity increase.
Solution Approach 2:
The patent applies local quality by treating control information and data differently in the MCS selection process. Instead of using a uniform MCS for both, the system applies a specialized second MCS specifically tailored for control information, which may have different reliability requirements than data. This localized optimization ensures that control information receives the appropriate level of protection and attention it deserves.
2Reliability
If different MCS is selected for control information compared to data, then reliability of control information is improved, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by first determining the MCS for data transmission based on channel conditions, then using this information as a foundation for determining the MCS for control information. This sequential approach, where the first MCS determination informs the second, reduces the overall complexity by establishing a baseline before applying additional considerations for control information optimization.
Solution Approach 2:
The patent uses the first MCS (determined for data) as an intermediary in determining the second MCS for control information. Rather than independently evaluating all possible MCS options for control information, the system uses the data MCS as a reference point or mediator, narrowing the search space and simplifying the decision-making process while still achieving optimized control information transmission.
3Device complexity
If MCS for control information is restricted to values associated with data MCS, then device complexity is reduced, but error protection capability deteriorates
Solution Approach 1:
The patent introduces dynamics into the MCS selection process by making the second MCS (for control information) adaptable and flexible rather than fixed. The system can dynamically adjust the second MCS based on the first MCS, channel conditions, and specific control information requirements. This dynamic approach allows the system to overcome the limitations of fixed MCS restrictions while maintaining manageable complexity through structured adaptation.
Solution Approach 2:
The patent applies parameter changes by allowing the second MCS to have different characteristics and parameters than the first MCS. Instead of being constrained to the same MCS values used for data, the control information MCS can be independently optimized with different modulation orders, coding rates, or other parameters. This parameter independence enables better error protection for control information while the structured relationship between the two MCS selections keeps complexity in check.
Data Source
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AI summary
The present disclosure addresses selection of a modulation and coding scheme (MCS) for control information multiplexed on a data channel. A spectral efficiency associated with control information may be derived as a function of a spectral efficiency associated with data. A modulation order and/or code rate may be selected that is suitable for the spectral efficiency associated with the data. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be configured to determine a first MCS for control information based on spectral efficiency associated with transmission of data, and further configured to transmit the control information with the first MCS, the control information being multiplexed with data.