Common and Dedicated MCS for Multicarrier Systems
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Solution Overview
Problem
Modern wireless communication systems face challenges in determining and utilizing optimal modulation and coding schemes (MCS) for efficient data transmission across multiple carriers, particularly in managing channel quality feedback and resource allocation effectively.
Innovation Solution
A method and apparatus for determining at least one modulation and coding scheme based on feedback received for downlink carriers, allowing for data modulation and coding for transmission, and for uplink carriers, determining channel quality to modulate and code data accordingly, enabling efficient data transmission across multiple carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate MCS are determined for each carrier, then transmission reliability is improved, but system complexity and overhead increase
Solution Approach 1:
The patent segments the MCS determination process by introducing a primary MCS for common data transmitted across multiple carriers and secondary MCS values for dedicated data on specific carriers. This segmentation allows the system to maintain separate optimization per carrier where needed while using a common baseline MCS to reduce overall complexity and signaling overhead.
2Manufacturing precision
If separate MCS are determined for each carrier, then data transmission quality is improved, but feedback overhead increases
Solution Approach 1:
The patent extracts the common MCS determination from the per-carrier MCS feedback process. By identifying and separating the common MCS that applies across multiple carriers, the system reduces feedback overhead by not requiring separate full MCS feedback for each carrier, while still maintaining the ability to specify secondary MCS values for carriers requiring dedicated optimization.
3Loss of information
If common MCS is used across multiple carriers, then overhead is reduced, but adaptability to channel conditions decreases
Solution Approach 1:
The patent introduces dynamic adaptability by allowing the system to switch between using only the primary common MCS and using both primary and secondary MCS values based on channel conditions and data requirements. This dynamic approach enables the system to adapt its level of per-carrier optimization according to actual needs, balancing overhead and adaptability.
4Reliability
If multiple MCS values are transmitted for each carrier, then transmission reliability is improved, but resource allocation efficiency decreases
Solution Approach 1:
The patent applies local quality by providing dedicated secondary MCS values only for specific carriers or specific data streams that require enhanced optimization, rather than applying separate MCS determination to all carriers uniformly. This allows the system to maintain high reliability for critical transmissions while improving resource allocation efficiency by avoiding unnecessary per-carrier MCS signaling for data that can use the common MCS.
Data Source
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AI summary
A method, an apparatus, and a computer program product for wireless communication are provided in which at least one modulation and coding scheme (MCS) is determined based on feedback received for a plurality of downlink (DL) carriers and transmitted from a device. Data is modulated and coded, according to the at least one MCS, for transmission to the device on the DL carriers.