Parallel Uplink Transmission Configuration for Interference Minimization
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Solution Overview
Problem
Simultaneous uplink transmissions in wireless communication systems often interfere due to secondary propagation paths and reflections, reducing the reliability and efficiency of uplink transmissions to multiple transmission-reception points (TRP).
Innovation Solution
An apparatus configured to receive indications of first and second uplink configurations from a network node and transmit overlapping uplink transmissions using these configurations, with options for non-overlapping transmissions or default configurations, to minimize interference and enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If simultaneous uplink transmissions are performed to multiple TRPs, then reliability and capacity of uplink transmissions are improved, but interference between transmissions increases due to secondary propagation paths and reflections
Solution Approach 1:
The uplink transmission is segmented into multiple independent transmissions to different TRPs. Each transmission uses separate resource allocations (time, frequency, or spatial resources), allowing the system to achieve diversity gain while managing interference through resource partitioning. The UE maintains separate transmission chains for each TRP, enabling independent control of transmission parameters.
Solution Approach 2:
The patent introduces spatial dimensionality by transmitting to multiple TRPs simultaneously using different spatial resources (beam directions, antenna panels). This multi-dimensional approach allows the system to overcome the interference problem in the time-frequency domain by utilizing the spatial domain, where signals to different TRPs can be separated through spatial filtering and directional beamforming.
2Productivity
If multiple antenna panels or beamforming are used for directional uplink transmission, then capacity and reliability are improved, but device complexity increases
Solution Approach 1:
The UE is designed with multi-functional antenna panels that can serve multiple TRPs simultaneously. The same antenna hardware is used for both single-TRP and multi-TRP operations, and for different beamforming configurations. This universal design allows the system to achieve high capacity through spatial multiplexing without proportionally increasing hardware complexity.
Solution Approach 2:
The beamforming configuration is made dynamic, allowing the UE to adaptively adjust beam directions, widths, and power distribution based on channel conditions and TRP requirements. The system can dynamically switch between different antenna panels and beamforming schemes (codebook-based, non-codebook-based) to optimize capacity while managing computational complexity through adaptive algorithms.
Data Source
AI summary
Various example embodiments relate to configuration of uplink transmissions. An apparatus may transmit a first uplink transmission with a first uplink configuration and a second uplink transmission with a second uplink configuration. The first and second uplink transmissions may at least partially overlap. The first and second uplink configurations may comprise first and a second initial cyclic shifts, first and second orthogonal cover codes, first and second reference signal initializations, first and second scrambling sequence initialization, and/or first and second scrambling sequences for the first uplink transmission and the second uplink transmission, respectively.