MIMO Transmitter MCS Adaptation for SIC Receivers
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Solution Overview
Problem
In MIMO communication systems, the potential throughput of Successive Interference Cancellation (SIC) receivers is not fully realized due to the same Modulation and Coding Scheme (MCS) levels being applied to all transport blocks, which limits the system's ability to adaptively allocate resources effectively.
Innovation Solution
A method and apparatus that determine whether a receiver is an SIC receiver and adjust the MCS levels for each transport block accordingly, allowing for differentiated MCS allocation based on receiver type, thereby enhancing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same MCS level is applied to all transport blocks, then the system maintains simplicity in resource allocation, but the throughput of SIC receivers is not fully realized
Solution Approach 1:
The patent applies different MCS levels to different transport blocks based on the receiver type. Specifically, SIC receivers are identified and allocated different MCS levels for their respective transport blocks, while non-SIC receivers continue to receive the same MCS level allocation. This localized differentiation optimizes throughput for SIC receivers without complicating the system for other receiver types.
Solution Approach 2:
The patent introduces dynamic MCS level allocation that adapts to the receiver type. The base station determines whether a receiver is an SIC receiver and dynamically adjusts the MCS levels accordingly. This dynamic adaptation allows the system to maximize throughput by matching the allocation strategy to the receiver's capabilities.
2Productivity
If different MCS levels are allocated to each transport block for SIC receivers, then throughput is improved, but the complexity of determining and managing receiver types increases
Solution Approach 1:
The patent employs feedback mechanisms where the receiver type information is communicated back to the base station. The base station determines the receiver type based on feedback information from the receiver, such as capability indicators or performance metrics. This feedback loop enables the base station to make informed decisions about MCS level allocation without requiring complex real-time analysis at the transmitter.
Solution Approach 2:
The patent uses feedback information as an intermediary to convey receiver type characteristics. Instead of directly analyzing complex receiver internal states, the system uses standardized feedback messages that indicate receiver type. This intermediary simplifies the determination process at the base station while still enabling differentiated MCS level allocation.
3Productivity
If adaptive MCS allocation is implemented for SIC receivers, then resource allocation efficiency is improved, but the system requires more sophisticated control mechanisms
Solution Approach 1:
The patent segments the receiver population into different types (SIC receivers and non-SIC receivers) and applies different MCS level allocation strategies to each segment. This segmentation allows the system to implement sophisticated control mechanisms only where needed (for SIC receivers) while maintaining simple allocation for other receivers, thereby improving overall resource allocation efficiency without uniformly increasing system complexity.
Data Source
AI summary
A method and apparatus for transmitting at least two transport blocks in a Multi-Input Multi-Output (MIMO) communication system, in which a transmitter determines whether a type of a receiver receiving the at least two transport blocks is a Successive Interference Cancellation (SIC) receiver, determines a Modulation and Coding Scheme (MCS) level for the at least two transport blocks depending on whether the type of the receiver is an SIC receiver, and transmits the at least two transport blocks using the determined MCS level.