Aggressor Network Node Identification for Downlink Interference Control
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Solution Overview
Problem
Network nodes experiencing interference from neighboring nodes are unable to effectively communicate the interference issue or identify the aggressor node, leading to synchronization challenges and communication disruptions.
Innovation Solution
A first network node transmits an identifier and an indication to a second network node via an over-the-air channel, instructing the second node to modify its downlink transmissions to reduce or eliminate interference, using restricted time windows, power levels, beams, or TRP identifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network nodes transmit downlink communications simultaneously, then communication efficiency and resource utilization are improved, but interference between neighboring nodes increases
Solution Approach 1:
The patent implements periodic time windows where network nodes alternately transmit and receive communications. During designated time windows, nodes switch between transmitting downlink communications and receiving uplink communications, creating a periodic pattern that prevents simultaneous transmission and reception, thereby eliminating interference while maintaining communication efficiency through structured resource allocation
Solution Approach 2:
The patent dynamically adjusts transmission parameters including time window allocation, frequency resource distribution, and power levels based on real-time interference conditions and network traffic demands. This dynamic adaptation allows the system to optimize communication efficiency while preventing interference by continuously adjusting operational parameters rather than using fixed configurations
2Productivity
If network nodes use full-duplex communication, then spectral efficiency is improved, but self-interference and cross-node interference increase
Solution Approach 1:
The patent segments the communication process into distinct time windows and frequency resources, separating transmit and receive operations both temporally and spectrally. By dividing available resources into multiple segments and allocating them to different nodes at different times, the system achieves full-duplex spectral efficiency while preventing self-interference through resource isolation
Solution Approach 2:
The patent introduces coordination signaling as an intermediary mechanism that mediates between transmitting and receiving operations. Through exchange of control messages and interference indicators between network nodes, the system coordinates resource allocation and transmission timing, enabling full-duplex operation while managing and eliminating interference through centralized coordination
3Reliability
If network nodes increase transmission power, then signal quality and coverage are improved, but interference to other nodes increases
Solution Approach 1:
The patent applies local quality by assigning different power levels, time window allocations, and frequency resources to different network nodes based on their specific locations, traffic demands, and interference environments. This localized optimization allows each node to transmit at appropriate power levels for its coverage area while minimizing interference to neighboring nodes, achieving overall network quality improvement without universal power increases
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first network node may receive, in a first time interval, interference signals from a second network node on a portion of uplink resources used by the first network node to receive from a first set of wireless devices served by the first network node in the first time interval. The first network node may transmit, to the second network node, an identifier associated with the second network node and an indication that the second network node is to modify transmission on downlink resources used by the second network node to transmit to a second set of wireless devices served by the second network node. Transmitting the indication that the second network node is to modify transmission on the downlink resources includes transmitting, to the second network node, a signal configured to indicate modifying the transmission on the downlink resources.