Uplink Positioning Reference Signal SPS Configuration
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Solution Overview
Problem
Current 5G NR systems face challenges in efficiently multiplexing radio resources based on different numerologies to meet the diverse requirements of various usage scenarios such as enhanced mobile broadband, massive machine-type communication, and ultra-reliable and low-latency communication, particularly in designing flexible frame structures and positioning reference signals for accurate UE positioning.
Innovation Solution
The implementation of semi-persistent scheduling (SPS) for transmitting uplink positioning reference signals (UL PRS) to enable accurate UE positioning by configuring SPS configuration information for UL PRS transmission, using SRS, DMRS, or PRACH as UL PRS, and allocating specific radio resources for positioning without concurrent data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If semi-persistent scheduling is used for UL PRS transmission, then positioning accuracy and resource allocation flexibility are improved, but system complexity increases due to additional configuration management
Solution Approach 1:
The base station performs preliminary configuration of SPS parameters including periodicity, subcarrier spacing, and resource allocation before UL PRS transmission. This preliminary action allows the UE to automatically transmit UL PRS at predetermined intervals without requiring continuous scheduling commands, thereby improving positioning accuracy while reducing the complexity of real-time configuration management.
Solution Approach 2:
The patent implements periodic UL PRS transmission based on configured periodicity values (e.g., every 10ms, 20ms, or 40ms). This periodic action ensures consistent positioning measurements at regular intervals without requiring continuous network intervention, improving measurement precision while simplifying the operational complexity through automated periodic behavior.
2Productivity
If SPS configuration is implemented for UL PRS, then resource allocation efficiency is improved, but signaling overhead increases due to configuration information transmission
Solution Approach 1:
The SPS configuration for UL PRS transmission is designed to be multi-functional, supporting various periodicity values (10ms, 20ms, 40ms), different subcarrier spacings (15kHz, 30kHz, 60kHz), and multiple use cases (eMBB, mMTC, URLLC) through a single unified configuration mechanism. This universality improves resource allocation efficiency across diverse scenarios while minimizing the need for separate configuration signaling for each case.
Solution Approach 2:
The patent utilizes parameter changes in the SPS configuration (periodicity, subcarrier spacing, resource block allocation) to adapt UL PRS transmission to different service requirements. By adjusting these parameters rather than creating separate configuration structures for each service type, the system achieves efficient resource allocation while reducing signaling overhead through parameter reconfiguration of an existing framework.
3Adaptability or versatility
If flexible frame structures are designed for different numerologies, then adaptability to various usage scenarios is improved, but frame structure complexity increases
Solution Approach 1:
The patent applies local quality by configuring specific numerology parameters (subcarrier spacing, cyclic prefix length, resource block size) locally for UL PRS transmission based on the required usage scenario. For example, larger subcarrier spacing (60kHz) is locally applied for URLLC scenarios requiring low latency, while smaller spacing (15kHz) is used for eMBB scenarios. This localized parameter optimization improves adaptability without requiring complete frame structure redesign for each scenario.
Solution Approach 2:
The SPS configuration enables dynamic adaptation of UL PRS transmission parameters according to different usage scenarios. The base station can dynamically adjust periodicity, subcarrier spacing, and resource allocation based on real-time requirements for eMBB, mMTC, or URLLC services. This dynamic configuration approach improves versatility while managing frame structure complexity through centralized control rather than rigid predefined structures.
Data Source
AI summary
Provided are methods and apparatuses for performing positioning. The method may include receiving SPS configuration information for transmission of a UL PRS from a base station, and transmitting the UL PRS based on the SPS configuration information.