Radio Link Transmission Optimization via Pre-coding Vector Selection
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Solution Overview
Problem
Current radio communication systems face limitations in optimizing data throughput due to the conventional method of selecting pre-coding vectors based on averaged channel quality indicators, which results in lost detailed information about the transmission path and increased interference levels.
Innovation Solution
A method that involves transmitting predefined radio frequency signals from multiple antenna elements, receiving and processing these signals using multiple pre-coding vectors, and selecting optimal transmission configurations based on real-time or offline evaluation of received signals to adapt to current transmission path characteristics, thereby improving data throughput and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional method of selecting pre-coding vectors based on averaged channel quality indicators is used, then device complexity is reduced, but measurement precision and data throughput are degraded due to lost detailed information about transmission path
Solution Approach 1:
The patent segments the channel quality assessment by evaluating multiple individual pre-coding vectors separately rather than using a single averaged indicator. Each pre-coding vector is assessed individually through feedback reports containing quality metrics, allowing precise identification of the best vector without requiring complex real-time processing of all vectors simultaneously.
Solution Approach 2:
The system performs preliminary evaluation of multiple pre-coding vectors by having the mobile station calculate and report quality indicators for each vector in advance. This preliminary action allows the base station to select the optimal pre-coding vector based on pre-computed feedback, reducing the need for complex real-time processing during actual data transmission.
2Adaptability or versatility
If multiple pre-coding vectors are transmitted for evaluation, then adaptability to transmission path characteristics is improved, but loss of time for signal processing and feedback increases
Solution Approach 1:
The patent implements periodic feedback reporting where the mobile station evaluates and reports quality indicators for multiple pre-coding vectors at regular intervals. This periodic action allows the system to maintain up-to-date knowledge of transmission path characteristics without requiring continuous real-time processing, thus balancing adaptability with time efficiency.
Solution Approach 2:
The mobile station autonomously performs the evaluation of multiple pre-coding vectors and generates feedback reports containing quality indicators for each vector. This self-service approach allows the system to gather comprehensive channel quality information without requiring extensive base station processing resources, reducing overall signal processing time while maintaining high adaptability.
3Adaptability or versatility
If conventional single codebook approach is used, then device complexity is reduced, but adaptability to different transmission conditions deteriorates
Solution Approach 1:
The patent applies local quality by selecting different codebooks based on specific transmission conditions and channel characteristics. Instead of using a single universal codebook, the system chooses from multiple codebooks (e.g., DFT-based codebooks with different sizes) depending on the evaluated channel quality and transmission requirements, allowing optimal adaptation to local transmission conditions.
Solution Approach 2:
The system dynamically selects appropriate codebooks based on real-time channel quality feedback and transmission conditions. The codebook selection is not static but adapts continuously as channel conditions change, allowing the system to optimize performance for varying transmission scenarios while managing complexity through structured selection criteria.
4Productivity
If real-time evaluation of multiple pre-coding vectors is performed, then data throughput is improved through accurate transmission configuration selection, but interference levels increase due to more frequent transmissions
Solution Approach 1:
The patent applies partial action by evaluating a selected subset of pre-coding vectors rather than exhaustively testing all possible vectors. The mobile station calculates quality indicators for multiple vectors but focuses feedback on the most promising candidates, allowing the base station to select optimal configurations without requiring all vectors to be actively transmitted and evaluated, thus reducing interference while maintaining high throughput.
Data Source
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AI summary
The invention relates to a method for optimizing radio link transmission in a radio communication system (RCS). The method comprises the steps of transmitting predefined radio frequency signals (PS) successively from at least two antenna elements (BS1-AE1, BS1-AE2) of at least one antenna array (BS1-AS1 to a receiving unit (RU1, RU2), receiving at the receiving unit (RU1, RU2) first radio signals (MRS1-MS1, MRS1-MS2) and at least second radio signals (MRS2-MS1, MRS2-MS2) for the transmission via the at least two antenna elements (BS1-AE1, BS1-AE2), providing the received first and at least second radio signals (MRS1-MS1, MRS1-MS2, MRS2-MS1, MRS2-MS2) from the receiving unit (RU1, RU2) to an selection unit (SU1), selecting at the selection unit (SU1) at least one of at least two transmission configurations based on the received first and at least second radio signals (MRS1-MS1, MRS1-MS2, MRS2-MS1, MRS2-MS2) and the predefined radio frequency signals (PS), and providing from the selection unit (SU) the selected at least one transmission configuration to a transmission unit (TU1) of the at least one antenna array (BS1-AS1). The invention further relates to a transmission unit (TU1), a selection unit (SU), a network node (BS1) comprising the selection unit (SU), and an apparatus for analyzing radio link communication comprising the selection unit.