Dynamic TDD Subframe Switching for Mixed Interference Management
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Solution Overview
Problem
Current wireless communication systems face challenges in managing mixed interference scenarios, where downlink-to-uplink or uplink-to-downlink interference occurs, leading to degraded performance and limited ability to dynamically adjust scheduling to align with traffic loads, especially in LTE implementations.
Innovation Solution
The system generates and manages jamming graphs based on mixed interference information received from user equipment (UEs) and base stations, allowing for dynamic switching of downlink and uplink TDD subframes to mitigate interference and optimize scheduling without introducing unacceptable mixed interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed configurations of downlink and uplink subframes are used, then deployment and management are simple, but the system cannot dynamically adjust scheduling to align with traffic loads and mixed interference scenarios occur
Solution Approach 1:
The patent applies dynamics by enabling base stations to dynamically switch between fixed and flexible TDD configurations based on traffic conditions and interference levels. The system transitions from static subframe assignments to adaptive scheduling where downlink and uplink subframes can be reconfigured in real-time to match traffic demands while managing interference between neighboring cells.
2Reliability
If synchronized downlink and uplink scheduling is implemented, then mixed interference scenarios are avoided, but the system cannot adapt to varying traffic loads in different directions
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting TDD configuration parameters (downlink-uplink subframe ratios, scheduling timelines) based on observed traffic patterns and interference conditions. Base stations can modify these parameters to optimize throughput for asymmetric traffic loads while implementing interference coordination mechanisms to maintain reliability.
Solution Approach 2:
The patent implements feedback mechanisms where base stations monitor interference levels and traffic conditions, then use this information to adjust scheduling decisions. The system continuously adapts TDD configurations based on feedback from channel quality indicators, interference measurements, and traffic demand, enabling dynamic optimization of both throughput and interference management.
3Productivity
If dynamic switching of TDD subframes is enabled, then traffic load alignment is improved, but mixed interference management complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the network into interference coordination groups or clusters, where base stations within each group coordinate their TDD configurations independently. This segmentation reduces the overall complexity by localizing the coordination problem, allowing dynamic throughput adaptation while managing interference complexity through hierarchical or distributed control structures.
Data Source
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AI summary
Systems and methods for providing mixed interference management are disclosed. Implementations providing mixed interference management may provide operation to receive reported mixed interference information from at least one of one or more user equipments (UEs) served by the base station or from one or more other base stations operable in a same communication system, wherein the mixed interference information comprises information regarding at least one of downlink-to-uplink or uplink-to-downlink interference experienced by a respective reporting one of the one or more UEs and one or more other base stations, and to provide mixed interference management using the reported mixed interference information. The mixed interference information may be used to generate jamming graphs, wherein the jamming graphs provide a mixed interference profile for base stations, and wherein the jamming graphs may be used to determine whether to implement a switch of uplink/downlink subframes based on the interference mitigated mixed interference profile.