Wireless Control Apparatus Beamforming Channel Gain Estimation
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Solution Overview
Problem
In high-frequency wireless communication systems, such as 5G and 6G, the channel state information reported by wireless terminals with multiple antenna panels may not accurately reflect the current communication conditions due to movement or environmental changes, leading to suboptimal radio resource and modulation/coding scheme allocation, which can decrease communication speed.
Innovation Solution
A control apparatus and method that calculates channel gain using a reference signal transmitted by the wireless terminal and estimates reception quality based on this gain and transmission power, allowing for proper allocation of radio resources and modulation/coding schemes according to the current communication state, even when beamforming is performed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If channel state information is reported by wireless terminal using past measurement, then reporting complexity is reduced, but allocation accuracy deteriorates
Solution Approach 1:
The base station performs preliminary actions by calculating channel gain using reference signals and estimating reception quality before resource allocation. This allows the base station to proactively determine optimal allocation parameters based on current channel conditions rather than relying on delayed terminal reports, resolving the contradiction between reporting simplicity and allocation accuracy.
2Adaptability or versatility
If wireless terminal moves or environment changes, then communication adaptability is improved, but channel state accuracy deteriorates
Solution Approach 1:
The system implements feedback through reference signal transmission and reception quality estimation. The base station continuously monitors channel conditions by receiving reference signals from the wireless terminal and calculating channel gain, then uses this feedback to dynamically adjust resource allocation and modulation/coding schemes, maintaining accuracy despite terminal movement or environmental changes.
Solution Approach 2:
The channel gain calculation and reception quality estimation processes are dynamically updated based on current reference signal measurements rather than relying on static past reports. This dynamic approach allows the system to adapt to changing communication conditions while maintaining accurate channel state information for optimal resource allocation.
3Speed
If base station uses past channel state information, then processing speed is improved, but resource allocation optimality deteriorates
Solution Approach 1:
The base station performs preliminary channel gain calculation and reception quality estimation using reference signals before actual data transmission. This preliminary action ensures that resource allocation and modulation/coding scheme selection are based on current channel conditions, maximizing communication speed and efficiency without sacrificing processing speed.
Data Source
AI summary
A control apparatus controls communication between a wireless terminal and a wireless apparatus. The control apparatus includes: a calculation unit that calculates a channel gain between the wireless terminal and the wireless apparatus when a beam is used, by using a reference signal transmitted by the wireless terminal using the beam; an estimation unit that estimates reception quality when the wireless terminal performs reception by using the beam, based on the channel gain and transmission power of the wireless apparatus; and an allocation unit that allocates at least one of a radio resource and a modulation and coding scheme to the wireless terminal, based on the reception quality.