5G NR Measurement Gap Signaling for Low-Latency Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for improved methods in 5G NR technology to efficiently handle location management functions (LMF) and measurement gaps (MG) in wireless communication systems to enhance latency, reliability, and scalability, particularly in scenarios involving user equipment (UE) location measurements.
Innovation Solution
The implementation of methods and apparatuses at both base stations and UEs to manage location requests, acknowledge these requests, and transmit measurement gap (MG) requests using radio resource control (RRC) signaling, uplink control information (UCI), or uplink medium access control (MAC) control elements (CE), while also handling rejections and cancelations of these requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station waits for acknowledgment before transmitting MG request, then the reliability of location measurement is improved, but the latency increases
Solution Approach 1:
The base station transmits the MG request in advance based on the location request before receiving the acknowledgment from the UE. This preliminary action allows the measurement gap to be configured earlier, reducing the overall latency of the location measurement process while maintaining reliability through subsequent confirmation mechanisms.
2Adaptability or versatility
If multiple signaling methods (RRC, UCI, MAC-CE) are supported for MG request transmission, then the adaptability of the system is improved, but the device complexity increases
Solution Approach 1:
The patent enables the base station and UE to support multiple signaling methods (RRC signaling, UCI, and MAC-CE) for transmitting MG requests. This multi-functionality allows the system to adapt to different scenarios and requirements, with the capability to select the most appropriate signaling method based on current system conditions, UE capabilities, and network requirements.
Solution Approach 2:
The system dynamically selects among multiple signaling methods (RRC, UCI, MAC-CE) for MG request transmission based on current conditions. The base station can adaptively choose the most suitable signaling approach, and the UE can indicate its preferred method through capability information, making the system flexible and responsive to changing operational requirements.
3Loss of time
If the base station transmits MG request after location request without waiting for acknowledgment, then the latency is reduced, but the reliability may deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the UE sends an acknowledgment for the location request. The base station uses this feedback to determine whether to proceed with transmitting the MG request. This feedback loop ensures that the base station only initiates measurement gaps when the UE has properly received and processed the location request, maintaining reliability while enabling timely execution.
Data Source
AI summary
Methods, apparatuses, and computer-readable storage medium for positioning are provided. An example method at a base station may include transmitting, to a user equipment (UE), a location request requesting location information from the UE. The example method at the base station may further include receiving, from the UE, an acknowledgment acknowledging the location request. The example method at the base station may further include transmitting, to the UE based on the received acknowledgment, a measurement gap (MG) request associated with a location management function (LMF) for the UE to measure its location based on the transmitted location request.