No-Downlink-Scheduling Gaps for PRS Processing in 5G UEs
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in efficiently managing no-downlink-scheduling gaps to facilitate effective positioning reference signal (PRS) processing, which affects the accuracy and efficiency of user equipment (UE) positioning in scenarios requiring high data transfer speeds and low latency.
Innovation Solution
A method where user equipment (UE) requests a no-downlink-scheduling gap to receive a downlink positioning reference signal (DL-PRS) from a neighboring base station, allowing it to prioritize PRS processing over other downlink transmissions during designated time slots, ensuring uninterrupted PRS reception and transmission without downlink data from the serving base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE receives downlink transmissions from the serving base station during no-downlink-scheduling gaps, then data transmission efficiency is improved, but positioning accuracy deteriorates due to interference with PRS processing
Solution Approach 1:
The patent segments the downlink reception by introducing no-downlink-scheduling gaps where the UE stops receiving data transmissions from the serving base station. This temporal segmentation allows dedicated periods for PRS processing without interference, while other periods maintain normal data transmission, thus resolving the contradiction between data efficiency and positioning accuracy
Solution Approach 2:
The UE sends a request message to the serving base station in advance to schedule no-downlink-scheduling gaps. This preliminary action allows the network to prepare and coordinate the gaps with neighboring base stations before they occur, ensuring that PRS transmissions are properly synchronized and positioned without interfering with ongoing data transmissions
2Measurement precision
If the UE prioritizes DL-PRS processing over other downlink transmissions, then positioning accuracy is improved, but data transmission efficiency deteriorates due to interrupted downlink data reception
Solution Approach 1:
The patent implements periodic no-downlink-scheduling gaps at specifically configured time intervals rather than continuous interruption. This periodic approach allows the UE to prioritize PRS processing only when needed, while maintaining normal data transmission during other periods, thus achieving positioning accuracy without permanently sacrificing data transmission efficiency
Solution Approach 2:
The no-downlink-scheduling gaps are dynamically configured based on positioning requirements and network conditions. The serving base station can adjust the timing and duration of gaps according to the UE's positioning needs and data traffic patterns, making the system adaptive rather than static, thus balancing positioning accuracy and data efficiency
3Measurement precision
If the UE requests frequent no-downlink-scheduling gaps for PRS processing, then positioning efficiency is improved, but network resource utilization deteriorates due to increased scheduling overhead and lost data transmissions
Solution Approach 1:
The patent changes the parameter of time-domain configuration by introducing configurable gap patterns with varying periods and durations. Instead of fixed frequent gaps, the system allows flexible parameter adjustment where the gap frequency and length can be optimized based on positioning requirements, reducing unnecessary scheduling overhead while maintaining positioning efficiency
Data Source
AI summary
Disclosed are various techniques for wireless communication. In an aspect, a user equipment (UE) transmits, to a serving base station, in one or more active bandwidth parts (BWPs) of the UE, a request for a no-downlink-scheduling gap, the request including at least time-domain parameters related to scheduling the no-downlink-scheduling gap, receives, from a neighboring base station, in the one or more active BWPs, a downlink positioning reference signal (DL-PRS) during the no-downlink-scheduling gap, and transmits, in the one or more active BWPs, an uplink positioning reference signal (UL-PRS) during the no-downlink-scheduling gap in response to reception of the DL-PRS.