UE SPS Configuration Differentiation in Multi-TRP 5G
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Solution Overview
Problem
In 5G NR wireless communication systems, there is ambiguity in determining which semi-persistent scheduling (SPS) configuration a user equipment (UE) has received data from multiple transmit-receive points (TRPs), especially when SPS configurations overlap or have similar parameters, leading to difficulties in acknowledging data correctly.
Innovation Solution
The UE employs differentiation characteristics such as frequency domain and time domain resource allocations, modulation and coding schemes, demodulation reference signal ports, and scrambling sequence initializations to distinguish between SPS configurations, and uses priority rules for TRPs to determine the correct SPS configuration for data reception and acknowledgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SPS configurations are used for multi-TRP communication, then communication reliability is improved, but ambiguity arises in determining which configuration the UE received data from
Solution Approach 1:
The patent applies the principle of differentiation by introducing distinct characteristics (analogous to color changes) to differentiate between multiple SPS configurations. Each SPS configuration is associated with unique parameters such as frequency domain resource allocations, time domain resource allocations, modulation and coding schemes, demodulation reference signal ports, and scrambling sequence initializations. These differentiation characteristics enable the UE to identify which specific SPS configuration corresponds to received data, eliminating ambiguity while maintaining multiple configurations for improved communication reliability
2Productivity
If SPS configurations have overlapping or similar parameters, then resource utilization is improved, but difficulty increases in detecting and measuring the correct configuration
Solution Approach 1:
The patent applies local quality by ensuring that while SPS configurations may overlap or have similar parameters in some aspects, each configuration possesses unique local characteristics that differentiate it. The UE can identify the correct configuration by examining specific differentiation characteristics such as frequency domain resource allocations, time domain resource allocations, modulation and coding schemes, demodulation reference signal ports, or scrambling sequence initializations. This allows resource utilization to be improved through overlapping configurations while maintaining the ability to detect and measure the correct configuration through its unique local characteristics
Data Source
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AI summary
A user equipment (UE) may be provisioned with multiple semi-persistent scheduling (SPS) configurations. The UE may determine a differentiation characteristic for determining which SPS configuration is indicated by a downlink control information or associated with a physical downlink shared channel (PDSCH). For example, the UE may receive a first activation of a first SPS configuration and a second activation of a second SPS configuration. The UE may determine the differentiation characteristic between the first SPS configuration and the second SPS configuration. The UE may determine that one of the first SPS configuration or the second SPS configuration is the SPS configuration for a received PDSCH based on the differentiation characteristic. The UE may transmit an acknowledgment of the PDSCH based on the determined SPS configuration.