LMF Server SRS Coordination for TRP Detection Timing
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Solution Overview
Problem
In new radio access technology (NR) systems, the activation of Sounding Reference Signals (SRS) for location purposes can lead to adjacent Transmission Receive Points (TRPs) failing to detect the SRS signal in time, due to the serving cell activating SRS without notifying relevant TRPs.
Innovation Solution
A cooperative operation mechanism is introduced between the serving cell of a terminal device and TRPs, where a Location Management Function (LMF) server facilitates the coordination by transmitting location request and response information, including SRS configuration recommendations and determinations, to ensure synchronized SRS detection across multiple TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the serving cell activates SRS for location purposes, then the location function is enabled, but adjacent TRPs fail to detect the SRS signal in time
Solution Approach 1:
The LMF server performs preliminary actions by determining SRS configuration information before TRP detection, and proactively notifies relevant TRPs of the serving cell's SRS activation. This advance notification ensures TRPs are prepared to detect SRS signals timely, resolving the timing issue where TRPs previously failed to detect SRS in time.
Solution Approach 2:
The mechanism establishes feedback loops where the LMF server monitors SRS activation status and communicates this information to TRPs. The TRPs receive notifications about SRS configuration and activation, enabling them to adjust their detection processes accordingly, thereby improving detection reliability and timing coordination.
2Productivity
If the serving cell activates SRS without notifying TRPs, then the activation process is simple and fast, but TRPs cannot detect SRS signal in time
Solution Approach 1:
The LMF server acts as an intermediary between the serving cell and TRPs. It receives notifications from the serving cell about SRS activation and forwards this information to relevant TRPs. This intermediary mechanism maintains the simplicity and speed of serving cell activation while ensuring TRPs receive timely notification, thus preserving both productivity and reliability.
Solution Approach 2:
The system segments the SRS activation and detection process into distinct functional components: the serving cell handles activation, the LMF server manages coordination and information distribution, and TRPs perform detection. This segmentation allows each component to operate independently and efficiently, maintaining activation speed while improving detection reliability through coordinated information flow.
3Measurement precision
If a cooperative operation mechanism is introduced between serving cell and TRPs, then SRS detection accuracy improves, but system complexity increases
Solution Approach 1:
The LMF server performs multiple functions: it determines SRS configuration information, notifies the serving cell, and communicates with TRPs. By consolidating these coordination functions in a single multi-functional entity, the system achieves improved detection precision without proportionally increasing overall system complexity, as the LMF server handles multiple tasks that would otherwise require separate mechanisms.
Data Source
AI summary
A method and apparatus for processing location information and a non-transitory computer-readable storage medium are disclosed. The method may include: transmitting, by a location management function (LMF) server, location request information to a serving cell of a terminal device, the location request information at least comprising sounding reference signal (SRS) configuration recommendation information; receiving, by the LMF server, location response information transmitted by the serving cell, the location response information at least comprising SRS configuration determination information; and transmitting, by the LMF server, measurement request information to a transmission receive point (TRP), the measurement request information comprising the SRS configuration determination information.