Dynamic Guard Band Adaptation for Interference Management
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in utilizing guard bands between uplink and downlink frequency bands, leading to suboptimal radio resource allocation and interference issues, particularly in dense networks and scenarios requiring low latency and high reliability.
Innovation Solution
Implementing a method to dynamically adjust the guard band between adjacent frequency bands based on adjacent channel leakage ratio information and channel condition information, allowing for flexible and adaptive management of guard bands on a per-user, per-scenario basis, especially in dense networks or when stringent latency requirements are needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If guard bands are utilized between adjacent channels to reduce unwanted adjacent channel interference, then interference reduction is achieved, but radio resources are wasted
Solution Approach 1:
The patent implements dynamic guard band adaptation where the guard band configuration is adjusted based on real-time channel conditions and interference levels. The system transitions from static to dynamic guard band management, allowing the guard band to be modified according to actual network requirements, thereby reducing resource waste while maintaining interference protection when needed.
Solution Approach 2:
The system changes the parameters of the guard band (such as bandwidth, positioning, or presence) based on measured channel conditions and interference characteristics. By modifying guard band parameters dynamically rather than maintaining fixed parameters, the system optimizes the balance between interference reduction and resource utilization.
2Reliability
If fixed guard band configuration is used between uplink and downlink frequency bands, then interference protection is provided, but spectral efficiency is reduced
Solution Approach 1:
The patent transforms the static guard band configuration into a dynamic system that adapts to changing network conditions. The guard band configuration is continuously adjusted based on uplink and downlink channel conditions, interference measurements, and traffic demands, enabling the system to maintain reliable interference protection only when and where actually needed, thus improving overall spectral efficiency.
Solution Approach 2:
The system applies different guard band configurations to different frequency bands, users, or spatial locations based on local channel conditions and interference characteristics. Rather than applying a uniform guard band configuration across all channels, the system tailors the guard band properties locally to match specific interference scenarios, optimizing both protection and resource utilization.
3Measurement precision
If larger guard band is allocated between adjacent frequency bands, then adjacent channel leakage ratio is improved, but available bandwidth for data transmission is reduced
Solution Approach 1:
The system dynamically changes the guard band parameters (bandwidth, frequency position, or existence) based on measured adjacent channel leakage ratios and available bandwidth requirements. When channel conditions allow, the guard band is reduced or removed to maximize available bandwidth; when interference levels indicate need for protection, the guard band parameters are adjusted to achieve the required leakage ratio performance.
Solution Approach 2:
The patent implements a dynamic adaptation mechanism that continuously monitors adjacent channel leakage and adjusts guard band size accordingly. This dynamic approach allows the system to minimize guard band overhead during periods of low interference while maintaining adequate protection during high-interference conditions, optimizing the trade-off between leakage ratio and available bandwidth.
Data Source
AI summary
There is provided a method in a network node, the method comprising: obtaining adjacent channel leakage ratio information on an uplink user equipment, UE, regarding first and second adjacent frequency bands, wherein the network node is configured to communicate in frequency-division duplexing mode with a plurality of UEs, comprising the uplink UE and a downlink UE, the first frequency band configured for uplink communication between the network node and the uplink UE and the second frequency band configured for downlink communication between the network node and the downlink UE; obtaining channel condition information regarding the downlink UE indicating channel condition associated with the first frequency band and channel condition associated with the second frequency band; adapting guard band between the first and second adjacent frequency bands based on the adjacent channel leakage ratio information and the channel condition information.