CSI-Aware Beamforming Vector Generation
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Solution Overview
Problem
Wireless communication networks face challenges in increasing capacity and throughput without expanding frequency bandwidth or deploying additional base stations, as existing methods either lead to increased interference or high operational costs, and CSI accuracy varies among devices, affecting beam-forming efficiency.
Innovation Solution
A method for generating beam-forming vectors in network nodes that prioritize CSI with high accuracy values, optimizing beam-forming vectors based on CSI accuracy to improve throughput and reduce interference, and using a common DMRS resource for devices with accurate CSI to conserve communication resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If more base stations are deployed to increase network capacity, then network throughput is improved, but interference increases and deployment cost increases
Solution Approach 1:
The patent applies local quality by making beam-forming vectors adaptive to local CSI accuracy conditions. Different beam-forming strategies are applied to different wireless devices based on their individual CSI accuracy values, rather than using a uniform approach across the entire network. This localized adaptation allows the system to achieve high throughput for devices with accurate CSI while avoiding the interference problems that would result from applying aggressive beam-forming to devices with inaccurate CSI.
2Productivity
If beam-forming is applied using available CSI, then network capacity is improved, but CSI accuracy varies among devices affecting performance
Solution Approach 1:
The patent implements dynamics by making the beam-forming vector generation process adaptive and dynamic. The system continuously monitors CSI accuracy values for different wireless devices and dynamically adjusts the beam-forming vectors accordingly. This dynamic adaptation ensures that beam-forming is applied optimally to each device based on current CSI accuracy conditions, maximizing network capacity while accounting for varying measurement precision across different devices and time instances.
Solution Approach 2:
The patent applies parameter changes by modifying the beam-forming vector generation process based on CSI accuracy parameters. The system changes the approach to beam-forming depending on the measured CSI accuracy value - using more aggressive beam-forming when accuracy is high and more conservative approaches when accuracy is low. This parameter-based adaptation allows the system to optimize network capacity while compensating for variations in CSI measurement precision.
3Productivity
If traditional beam-forming is used without considering CSI accuracy, then implementation is simple, but throughput is limited due to inaccurate CSI for some devices
Solution Approach 1:
The patent applies partial action by selectively applying enhanced beam-forming processing only to wireless devices with high CSI accuracy values, rather than applying complex processing to all devices. For devices with low CSI accuracy, the system uses simpler beam-forming approaches or alternative strategies. This partial application of complex processing achieves higher overall throughput while keeping the average device complexity manageable.
Data Source
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AI summary
A method, performed in a network node of generating at least one beam-forming vector for radio transmission to, or radio reception from, at least one target wireless device. The method comprises obtaining, for one or more wireless devices, respective channel state information, CSI, and CSI accuracy value. The method also comprises generating the at least one beam-forming vector based on the CSI and corresponding CSI accuracy value, wherein a CSI associated with a high CSI accuracy value is given equal or higher preference in the generating compared to a CSI associated with a CSI accuracy value lower than the high CSI accuracy value.