Full-Duplex Uplink Beam Selection for IAB Self-Interference
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Solution Overview
Problem
Legacy IAB systems operating in half-duplex mode face inefficiencies in radio resource spectrum utilization and cannot handle dynamic or urgent traffic scenarios, leading to reduced system throughput and impaired reception performance due to self-interference in full-duplex communication.
Innovation Solution
Implement full-duplex communication at network nodes, such as IAB nodes, by determining beam priorities and minimizing interference between uplink and downlink channels using beamforming techniques to enable concurrent transmission and reception, thereby optimizing resource allocation and supporting dynamic traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication is implemented at network nodes, then system capacity and spectral efficiency are improved, but self-interference between uplink and downlink channels worsens reception performance
Solution Approach 1:
The patent segments the communication channels by determining separate beam priorities for uplink and downlink channels. The network node divides the full-duplex communication into independent beam management processes, allowing separate optimization and interference control for each direction, thereby enabling high system capacity while maintaining reception performance through structured beam separation.
Solution Approach 2:
The patent introduces beam priority determination as an intermediary mechanism between uplink and downlink channels. By establishing beam priorities and using beamforming techniques, the system creates a mediating layer that manages the interaction between simultaneous transmit and receive operations, reducing self-interference while preserving full-duplex benefits.
2Reliability
If beamforming techniques are used to minimize interference, then reception performance is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by determining beam priorities for uplink and downlink channels before actual communication occurs. The network node pre-establishes beam configurations and priority levels, so that when full-duplex communication begins, the beamforming structures are already in place to minimize interference, reducing the need for complex real-time adjustments during operation.
3Reliability
If legacy half-duplex operation is used, then self-interference is avoided, but radio resource spectrum utilization efficiency deteriorates
Solution Approach 1:
The patent introduces dynamics by enabling the network node to adaptively switch between operational modes and dynamically adjust beam priorities based on traffic conditions. The system can dynamically determine uplink and downlink beam priorities in response to changing spectrum utilization needs, allowing it to achieve high spectrum efficiency when full-duplex is beneficial while maintaining interference avoidance capabilities when needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances system capacity and enables efficient delivery of packets in both directions, addressing the limitations of half-duplex systems by improving spectral efficiency and handling urgent traffic demands.
Implementation Method 1
determining beam priorities and minimizing interference between uplink and downlink channels using beamforming techniques
Data Source
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AI summary
Disclosed are techniques related to wireless communication system to enable full duplex communication. A network node is configured to communicate with a parent node and a child node. The network node may include a transceiver, a memory, and a processor communicatively coupled to the transceiver and the memory. The transceiver, memory, and processor may be configured to determine uplink (UL) parent and child link priorities for parent and child time-domain resources that overlap in time at least partially. The transceiver, memory, and processor may also be configured to determine UL parent and child beams based on the UL parent and child link priorities. The transceiver, memory, and processor may further be configured to notify the parent node of the UL parent beam for the parent and child time-domain resources. The transceiver, memory, and processor may yet further be configured to concurrently transmit parent traffic to the parent node using the UL parent beam and receive child traffic from the child node using the UL child beam.