Full Duplex Resource Reuse Interference Mitigation
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Solution Overview
Problem
Full duplex communication in wireless networks, such as LTE, faces interference issues due to devices using the same frequency and time resources for uplink and downlink transmissions, which existing methods struggle to mitigate effectively, affecting channel quality and signal integrity.
Innovation Solution
The implementation of enhanced user equipment (eUE) that estimates and reduces co-channel interference by using information from other interfering UEs within the same cell, employing techniques like dynamic receiver bandwidth adaptation, pilot signal analysis, and pre-distortion of signals to mitigate interference, while allowing for full duplex operation without disrupting legacy UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex communication is implemented using the same frequency and time resources for uplink and downlink, then spectral efficiency and resource utilization are improved, but co-channel interference between devices increases
Solution Approach 1:
The patent segments the interference mitigation process into multiple components: receiving interference measurements from multiple UEs, identifying specific interfering UEs, estimating interference levels on specific resources, and scheduling UEs to avoid identified interference. This segmentation allows the system to address interference systematically while maintaining full duplex operation.
Solution Approach 2:
The patent performs preliminary interference identification and estimation before scheduling uplink transmissions. The base station receives interference measurements, identifies interfering UEs, and estimates interference levels in advance, then uses this information to make informed scheduling decisions that prevent interference from occurring in the first place.
2Reliability
If interference mitigation techniques are implemented in full duplex communication, then channel quality and signal integrity are improved, but system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where UEs measure and report interference levels to the base station. This feedback loop enables the base station to continuously update its interference model and adjust scheduling decisions accordingly, maintaining channel quality through adaptive responses to changing interference conditions.
Solution Approach 2:
The patent enables UEs to autonomously measure interference on their own uplink and downlink channels and report these measurements to the base station. This self-service approach distributes the measurement burden across multiple UEs rather than requiring centralized monitoring, reducing overall system complexity while maintaining reliable channel quality assessment.
3Object-affected harmful factors
If enhanced user equipment with interference cancellation capabilities is deployed, then interference resistance is improved, but compatibility with legacy UEs must be maintained
Solution Approach 1:
The patent creates a universal interference mitigation framework that benefits both enhanced UEs with full duplex capability and legacy UEs. The base station performs interference identification and scheduling optimization that protects all UEs in the cell, regardless of their duplex capability. Enhanced UEs gain additional protection through the base station's scheduling decisions, while legacy UEs continue to operate without modification.
Data Source
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AI summary
Systems and apparatuses involve implementing methods that may include receiving, by enhanced user equipment (eUE), an assignment of Resource Blocks (RBs) from an eNodeB (eNB), wherein the eUE is configured to receive full-duplex transmissions; for each assigned RB, measuring interference caused by uplink transmissions from one or more legacy UEs; and reporting, to the eNB, the measured interference. The present implementations may provide an eUE-based approach, an eUE and eNB interactive approach, an eUE baseband approach, and an eUE analog approach to reducing interference for full duplex enabled mobile devices.