Network Node Uplink Priority Scheduling for Inter-UE Interference
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Solution Overview
Problem
Current communication systems face challenges in managing inter-user interference during full-duplex operations, where uplink and downlink transmissions share the same resources, leading to potential performance degradation due to interference, especially when user equipment (UEs) are close to each other.
Innovation Solution
The system implements a method where a network node schedules uplink transmissions with higher priority than downlink receptions, using a pre-configured signal for detection and feedback mechanisms via hybrid automatic repeat request (HARQ) codebooks to determine and mitigate inter-UE interference by adjusting resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink and downlink transmissions share the same resources in full-duplex operations, then resource utilization efficiency is improved, but inter-user interference increases leading to performance degradation
Solution Approach 1:
The shared resource is segmented into two parts: a first portion for uplink transmission and a second portion for downlink reception. This segmentation allows both uplink and downlink to occur simultaneously on the same resource without complete interference, as each UE uses a dedicated portion of the resource.
Solution Approach 2:
Different quality characteristics are assigned to different portions of the shared resource. The first portion is optimized for uplink transmission while the second portion is optimized for downlink reception, allowing each to maintain its required performance level while sharing the overall resource.
2Adaptability or versatility
If downlink reception is performed on shared resources, then resource sharing capability is improved, but detection reliability deteriorates due to uplink interference
Solution Approach 1:
The resource is divided into distinct portions for uplink and downlink, ensuring that the downlink portion remains free from uplink interference while still enabling resource sharing. The second portion is specifically allocated for downlink reception to maintain detection reliability.
Solution Approach 2:
The network node acts as an intermediary that coordinates the use of shared resources. It schedules uplink transmissions in the first portion and downlink receptions in the second portion, managing the resource allocation to prevent interference and maintain reliability.
3Object-affected harmful factors
If priority scheduling is implemented for uplink transmissions, then interference mitigation is improved, but scheduling complexity increases
Solution Approach 1:
The scheduling complexity is reduced by segmenting the resource into fixed portions for uplink and downlink. This simple segmentation rule automatically provides interference mitigation without requiring complex dynamic scheduling algorithms, as the first portion is always allocated for uplink and the second for downlink.
Data Source
AI summary
An apparatus in a network node has circuitry configured for causing a scheduling of an uplink transmission for a first user equipment and a downlink reception for a second user equipment on at least one resource, wherein the at least one resource is at least partially shared between the first user equipment and second user equipment. The apparatus has circuitry configured for providing an instruction, to the first user equipment, to transmit a first signal within the at least one resource. The apparatus also has circuitry configured for providing an instruction, to the second user equipment, to detect the first signal within the at least one resource. The apparatus having further circuitry configured for receiving information, from the second user equipment, wherein the information includes an indication of whether the second user equipment has detected the first signal.