Full-Duplex Uplink Scheduling for Inter-UE Interference Control
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Solution Overview
Problem
Full-duplex communication systems face significant interference challenges due to simultaneous uplink and downlink transmissions on the same resource, leading to issues like inter-UE interference, which existing technologies have not adequately addressed.
Innovation Solution
The proposed solution involves adjusting the primary resource allocation by rate-matching transport blocks and adjusting transmission power, and shifting demodulation reference signals within the adjusted resource allocation to minimize interference, while also allowing for dynamic scheduling adjustments based on sensing reservation signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication is implemented allowing simultaneous uplink and downlink transmissions on the same resource, then spectral efficiency is improved, but inter-UE interference increases
Solution Approach 1:
The patent implements dynamic resource allocation where the network node can adjust the resource allocation for uplink and downlink transmissions based on current interference conditions. The resource allocation is not fixed but can be dynamically modified to avoid interference, allowing the system to adapt to changing conditions while maintaining full-duplex operation.
Solution Approach 2:
The patent applies different resource allocation strategies to different resource blocks or frequency resources. Instead of uniformly allocating resources, the system identifies specific resources that cause interference and adjusts their allocation locally, allowing full-duplex operation on non-interfering resources while avoiding problematic ones.
2Object-generated harmful factors
If resource allocation is adjusted to reduce interference, then inter-UE interference is reduced, but system complexity increases
Solution Approach 1:
The user equipment performs autonomous sensing of reservation signals on granted resources and independently determines whether to transmit or request re-scheduling, without requiring complex centralized coordination for each resource adjustment decision.
Solution Approach 2:
The system implements feedback mechanisms where the user equipment reports sensing results and interference conditions to the network node, which then adjusts resource allocation based on this feedback, creating a closed-loop control system that manages interference efficiently.
Data Source
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AI summary
There is provided an apparatus comprising means for receiving, from a full-duplex network node, at least one message comprising at least primary scheduling information comprising at least a primary resource allocation for uplink data transmission, wherein a configuration related to the primary resource allocation indicates that the primary resource allocation is adjustable; sensing reservation signals on a physical resource block group basis, the sensing comprising determining one or more contiguous sets of physical resource block groups on which the apparatus is allowed to transmit; adjusting the primary resource allocation to correspond to at least a subset of the one or more contiguous sets of PRB groups to obtain an adjusted resource allocation; and transmitting, to the full-duplex network node, an adjustment indication on uplink control channel resource corresponding to the primary resource allocation, wherein the uplink control channel resource is received in the at least one message or is pre-configured.