Dynamic Guard Band Sizing for Full Duplex Interference
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Solution Overview
Problem
Full duplex (FD) wireless communication systems face interference issues due to the simultaneous transmission and reception of signals, which degrade performance, especially in scenarios where the size of guard bands is not optimally determined, leading to reduced data throughput and increased interference.
Innovation Solution
User equipment (UE) measures the interference and noise conditions to determine the optimal size of a guard band for a subsequent FD slot and reports this size to the base station, allowing for efficient resource scheduling and reduced interference by dynamically adjusting the guard band size based on current channel and interference conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a guard band is used in full duplex slots to reduce interference between downlink and uplink signals, then interference is reduced, but data throughput decreases due to resource allocation to the guard band
Solution Approach 1:
The patent implements dynamic guard band size adjustment where the base station determines different guard band sizes for different full duplex slots based on current interference conditions and traffic requirements. This allows the system to adapt the guard band size in real-time, reducing it when interference is low to maximize throughput and increasing it when interference is high to maintain signal quality.
Solution Approach 2:
The patent changes the parameter of guard band size from a fixed value to a variable parameter that can be adjusted based on channel conditions, interference levels, and traffic patterns. This parameter optimization allows the system to find the optimal balance between interference reduction and throughput maximization under different operating conditions.
2Object-affected harmful factors
If the guard band size is increased to minimize interference, then interference reduction is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts guard band size based on real-time interference measurements and traffic conditions, allowing resource allocation efficiency to be optimized for each specific scenario rather than using a conservative fixed size that would reduce efficiency in low-interference conditions.
Solution Approach 2:
The patent implements a feedback mechanism where the base station monitors interference levels and traffic patterns, then adjusts guard band sizes accordingly. This closed-loop control ensures that guard band resources are allocated efficiently - large enough to handle interference when present, but minimized when interference is low to maximize resource utilization.
3Device complexity
If a fixed guard band size is used for all full duplex slots, then system complexity is reduced, but adaptability to varying interference conditions deteriorates
Solution Approach 1:
The patent transitions from a static fixed guard band configuration to a dynamic adaptive configuration where guard band sizes are adjusted based on measured interference conditions and traffic requirements, enabling the system to adapt to varying environmental conditions while maintaining manageable complexity through algorithmic control.
Solution Approach 2:
The system performs self-optimization by automatically measuring interference conditions and adjusting guard band sizes without requiring manual configuration or complex external control, allowing the network to adapt autonomously to changing conditions while keeping implementation complexity reasonable.
Data Source
AI summary
An apparatus for wireless communication by a user equipment (UE) includes a receiver configured to receive a reference signal that is associated with a first full duplex (FD) slot. The apparatus further includes a transmitter configured to transmit a measurement report that is associated with the reference signal. The measurement report includes an indication of a size of a guard band associated with a second FD slot that is subsequent to the first FD slot.