Full Duplex Frequency Resource Allocation via DCI L and R Indices
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Solution Overview
Problem
In full duplex radio (FDR) communication systems, simultaneous data reception and transmission lead to interference between user equipment (UEs), reducing the signal-to-interference-plus-noise ratio (SINR) and overall system efficiency.
Innovation Solution
The proposed solution involves redefining the downlink control information (DCI) and uplink control information (UCI) structures, along with the use of a new RRC message, to implement a channel measurement scheme that enhances the efficiency of FDR communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex radio communication is implemented to enable simultaneous data reception and transmission, then communication capacity and spectral efficiency are improved, but interference between user equipment increases and SINR deteriorates
Solution Approach 1:
The patent segments the frequency resources into multiple parts and assigns different frequency configurations to different UEs. By dividing the frequency spectrum into distinct segments (different L and R values), the system reduces inter-UE interference while maintaining full duplex operation, as each UE operates on a customized frequency subset
Solution Approach 2:
The patent introduces dynamic frequency configuration where the base station can adjust the frequency parameters (L and R values) for each UE based on channel conditions and interference levels. This dynamic adaptation allows the system to optimize performance by changing frequency allocations in response to varying interference conditions
2Productivity
If frequency resources are allocated to multiple UEs for simultaneous communication, then system throughput increases, but resource allocation complexity and interference management difficulty increase
Solution Approach 1:
The patent manages resource allocation complexity by systematically varying key frequency parameters (L and R) for different UEs. Instead of managing complex time-frequency schedules, the system simplifies resource allocation by primarily adjusting these two frequency parameters, making interference management more tractable while maintaining high throughput
3Measurement precision
If channel measurement schemes are enhanced to improve interference measurement accuracy, then SINR estimation improves, but measurement and signaling overhead increases
Solution Approach 1:
The patent implements partial measurement by having UEs measure and report only specific frequency components (those affected by interference) rather than the entire spectrum. This selective measurement approach maintains adequate interference measurement accuracy while significantly reducing the amount of measurement data and signaling overhead
Data Source
AI summary
The present document discloses a method by which a terminal transmits/receives a signal in a wireless communication system, comprising the steps of: receiving frequency configuration information from a base station; receiving a control channel including downlink control information (DCI) from the base station; receiving a downlink signal from the base station on the basis of the DCI; and transmitting a hybrid automatic repeat and request acknowledgement/negative-acknowledgement (HARQ-ACK/NACK) in response to the downlink signal received from the base station, wherein the frequency configuration information includes information about length L of a predetermined frequency resource from the lowest frequency at which the downlink signal is received and information about length R of a predetermined frequency resource from the highest frequency at which the downlink signal is received, and the DCI includes indices indicating lengths L and R.