UE Positioning Signal Scheduling for Low-Latency Location Measurement
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Solution Overview
Problem
Existing wireless communication systems face challenges in reducing latency and delay time associated with location measurement procedures in user equipment (UE), particularly in next-generation communication systems that require high communication capacity and support for reliable and low-latency services.
Innovation Solution
A method is introduced to simplify the location measurement procedure by configuring a predefined time duration for receiving a positioning reference signal (PRS) and transmitting measurement information on allocated resources through a physical downlink control channel (PDCCH), with the option to skip scheduling requests based on a configured time offset, and prioritizing data transmission on physical uplink data channels (PUSCH) when resources are insufficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional location measurement procedures are used in wireless communication systems, then measurement accuracy can be maintained, but latency and delay time increase
Solution Approach 1:
The network pre-configures time offset values and measurement timing configurations for the UE before actual positioning measurements are needed. This allows the UE to have measurement opportunities pre-planned and scheduled, eliminating the need for real-time scheduling decisions and reducing latency in the location measurement procedure
Solution Approach 2:
The positioning procedure is divided into distinct phases: configuration phase where time offsets and measurement opportunities are pre-defined, and execution phase where measurements are taken at predetermined times. This segmentation allows parallel processing and reduces sequential delays in the measurement workflow
2Reliability
If scheduling requests are transmitted for resource allocation, then resource availability is ensured, but additional latency is introduced
Solution Approach 1:
Uplink resources for measurement reporting are pre-allocated to the UE in advance through RRC configuration or MAC CE signaling. This eliminates the need for the UE to transmit scheduling requests and wait for uplink grants at the time of measurement reporting, thereby reducing delay time while ensuring reliable resource availability through pre-established allocations
Solution Approach 2:
The scheduling request mechanism is extracted and removed from the positioning measurement reporting path. By dedicating specific uplink resources for positioning reports in advance, the system eliminates the scheduling request-exchange process that would otherwise introduce additional latency to the measurement procedure
3Reliability
If multiple data transmissions are prioritized on PUSCH, then data reliability is improved, but resource management complexity increases
Solution Approach 1:
Different priority levels are assigned to different types of uplink data transmissions. Positioning measurement reports are given high priority to ensure timely delivery, while other data transmissions follow standard scheduling. This localized quality differentiation ensures critical positioning data is transmitted reliably without requiring complex global resource management for all data types
Data Source
AI summary
Various embodiments relate to a next-generation wireless communication system for supporting a higher data rate than a 4th generation (4G) wireless communication system. According to various embodiments, provided are a method for transmitting and receiving signals in a wireless communication system and a device supporting same. Various other embodiments may also be provided.