Full Duplex Scheduling via Neighboring Lists
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Solution Overview
Problem
Full duplex transmission in wireless systems faces challenges with high self-interference cancellation, especially in cellular systems, and interference from neighboring user equipment (UEs) in multi-user access environments, which can impact data reception and increase costs.
Innovation Solution
A method and network component that schedules transmissions based on UE neighboring lists to avoid interference by determining and using logical neighboring lists for full duplex transmission, allowing UEs to transmit and receive on different time-frequency resources, and using device discovery, GPS, and interference measurement to create neighbor lists for effective scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex transmission is implemented to increase spectrum efficiency, then capacity is improved, but self-interference and interference from neighboring UEs worsen
Solution Approach 1:
The patent segments the time-frequency resources by creating neighboring lists that identify which UEs should not transmit simultaneously. This segmentation allows the system to enable full duplex transmission for non-neighboring UEs while avoiding interference from neighboring UEs, thus resolving the contradiction between capacity improvement and interference mitigation.
Solution Approach 2:
The patent introduces neighboring lists as an intermediary mechanism that mediates between full duplex transmission benefits and interference problems. The neighboring lists act as a filtering layer that identifies safe transmission combinations, enabling the system to exploit full duplex capacity while avoiding harmful interference through scheduled resource allocation.
2Productivity
If precise channel knowledge is required for technologies like CoMP, IA, and massive MIMO, then capacity enhancement is achieved, but feedback overhead and complexity increase
Solution Approach 1:
The patent performs preliminary channel estimation and neighboring list creation before actual data transmission. By establishing the neighboring lists and channel knowledge in advance, the system enables capacity-enhancing technologies like CoMP and massive MIMO without requiring continuous feedback overhead during data transmission, thus resolving the contradiction between capacity enhancement and feedback overhead.
3Productivity
If neighboring UEs are scheduled to transmit and receive simultaneously in full duplex mode, then spectrum efficiency is improved, but interference to other UEs increases
Solution Approach 1:
The patent applies local quality by creating UE-specific neighboring lists that identify interference relationships for each individual UE. This allows the system to enable full duplex transmission locally for UE pairs that do not interfere with each other, while preventing interference locally for UE pairs that are identified as neighbors, thus resolving the contradiction between spectrum efficiency and interference to other UEs.
Data Source
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AI summary
System and method embodiments are provided for transmission and reception scheduling for wireless devices in a multi-user full duplex transmission environment. The embodiments enable interference avoidance between neighboring wireless devices. The system and method also enable channel sounding. In an embodiment, a method for scheduling transmissions in a multi-user wireless system includes determining, by a transmission point, neighboring wireless devices for each of a plurality of wireless devices located within a coverage area of the transmission point and determining, by the transmission point, a transmission schedules for respective ones of the plurality of wireless devices according to the neighboring information of the devices such that each respective wireless device is scheduled to transmit data over different time-frequency resources than those in which neighboring wireless devices of the respective wireless device are scheduled to receive data.