Pathloss Reference for Small Data Transmission RRC
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Solution Overview
Problem
Current mobile communication networks face challenges in efficiently managing wireless devices with multiple technologies and capabilities, particularly in optimizing communication protocols and resource allocation across diverse wireless devices and base stations, leading to suboptimal performance and resource utilization.
Innovation Solution
The implementation of advanced New Radio (NR) user plane and control plane protocol stacks, along with flexible bandwidth management and carrier aggregation techniques, enables dynamic configuration and optimization of communication protocols and resource allocation based on device capabilities and network conditions, enhancing communication efficiency and adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Small Data Transmission (SDT) is used to maintain RRC connection, then resource utilization is improved, but pathloss reference accuracy deteriorates leading to suboptimal performance
Solution Approach 1:
The network side determines the pathloss reference for SDT transmissions autonomously based on pre-configured parameters and measurement results, without requiring additional signaling exchange. The gNB uses stored SSB or CSI-RS configuration information to calculate and apply the appropriate pathloss reference, enabling the system to self-manage pathloss compensation during SDT operations.
2Adaptability or versatility
If multiple wireless device technologies and capabilities are supported, then adaptability is improved, but device complexity increases leading to suboptimal performance management
Solution Approach 1:
The patent establishes a universal pathloss reference determination mechanism that works across multiple wireless device types, capabilities, and SDT transmission scenarios. The same core procedure—where the network side determines pathloss reference using pre-configured SSB or CSI-RS parameters—applies universally regardless of specific device capabilities, transmission configuration, or scenario variations, simplifying multi-technology support.
Data Source
AI summary
A wireless device receives a radio resource control (RRC) release message indicating one or more configured grants (CGs) for small data transmission (SDT) in an RRC inactive state and one or more downlink reference signals (RSs) configured for the SDT. The wireless device also transmits an uplink signal using a transmission power, wherein a downlink pathloss value of the transmission power is based on a first downlink RS, of the one or more downlink RSs, identified for a most recent uplink transmission via a first CG of the one or more CGs during the SDT.