Adaptive CSI Resource Allocation for Wireless Systems
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Solution Overview
Problem
Conventional wireless communication systems face inefficiencies in channel state information (CSI) resource allocation, leading to limited data rates and reduced capacity due to fixed and non-adaptive approaches, which do not effectively adapt to changing channel conditions.
Innovation Solution
A processing node dynamically allocates CSI resources based on received channel features and conditions, using differentiated coherence time models and system parameter adjustments to optimize CSI resource configurations and system settings, allowing for adaptive allocation and re-allocation of resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed and non-adaptive CSI resource allocation is used, then system complexity is reduced, but resource usage efficiency deteriorates
Solution Approach 1:
The patent implements dynamic CSI resource allocation by continuously monitoring channel conditions (Doppler shift, delay spread, signal strength) and adjusting CSI reporting configurations in real-time. The system transitions from fixed periodic reporting to adaptive reporting where the reporting period, frequency, and resource allocation are dynamically modified based on current channel characteristics, thereby improving resource usage efficiency without excessive complexity increase through structured adaptation rules.
Solution Approach 2:
The system changes key parameters of CSI resource allocation including reporting period, frequency resources, and time resources based on measured channel conditions. When channel conditions are stable, the system reduces CSI reporting frequency to free up resources for data transmission. When conditions change rapidly, the system increases reporting frequency to maintain accurate CSI, thus optimizing the trade-off between resource efficiency and communication reliability.
2Measurement precision
If frequent CSI transmissions are used, then CSI accuracy is improved, but data transmission rate deteriorates
Solution Approach 1:
The system applies partial action by transmitting CSI at reduced frequency when channel conditions are stable, rather than maintaining maximum CSI reporting frequency continuously. The patent determines that full CSI accuracy is only necessary during periods of rapid channel change, allowing the system to use less frequent (partial) CSI transmissions during stable periods, thereby freeing up radio resources for data transmission while maintaining adequate CSI accuracy when needed.
Solution Approach 2:
The system uses periodic CSI transmissions with dynamically adjusted periods based on channel stability. During stable channel conditions, the CSI reporting period is extended (less frequent transmissions). During rapid channel changes, the period is shortened (more frequent transmissions). This periodic adaptation allows the system to balance CSI accuracy requirements with data transmission rate optimization.
3Productivity
If adaptive CSI resource allocation is implemented, then resource usage efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the channel condition assessment into distinct measurable parameters (Doppler shift, delay spread, signal strength, interference levels) and processes each parameter independently through specific measurement and comparison operations. This segmentation allows the complex adaptation task to be divided into manageable sub-tasks, reducing overall system complexity while achieving comprehensive channel awareness for optimized CSI resource allocation.
Solution Approach 2:
The system implements feedback mechanisms where CSI measurements and channel condition assessments are continuously fed back to the resource allocation algorithm. This feedback loop enables the system to learn from past channel conditions and adjust future CSI resource allocation decisions, improving efficiency over time while maintaining manageable complexity through established feedback control structures.
4Ease of operation
If conventional fixed CSI resource allocation is used, then system operation is simplified, but the number of served UE deteriorates
Solution Approach 1:
The patent creates a universal adaptive resource allocation framework that can serve multiple UE with different channel conditions using a single standardized adaptation mechanism. The system evaluates channel conditions for each UE individually and allocates CSI resources dynamically, allowing the same base station to efficiently serve a larger number of UE with diverse mobility patterns and channel characteristics, rather than requiring separate fixed configurations for each UE.
Data Source
AI summary
An apparatus and methods for efficiently allocating channel state information (CSI) resources in a wireless communication system are provided. The apparatus includes a processing node configured to receive one or more channel features, wherein the one or more channel features are associated with a radio channel corresponding to a radio link connecting an access node and a user equipment. The processing node is configured to determine one or more distinguishing channel conditions based on the received one or more channel features, determine a desired channel state information (CSI) resource configuration based on the one or more distinguishing channel conditions, and allocate the desired CSI resource configuration based on the desired CSI resource configuration, and adjust a current CSI resource configuration associated with the radio channel, based on the determined desired CSI resource configuration.