Measurement Gap Offset Configuration for PRS Detection
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Solution Overview
Problem
In radio communication technologies, improper configuration of gap offset can lead to failure in detecting Positioning Reference Signals (PRS) during inter-frequency measurements, affecting PRS detection performance.
Innovation Solution
Determining the gap offset based on the PRS information of the cell engaged in positioning, ensuring that the measurement gap covers the positioning occasion, thereby improving the probability of detecting the PRS within the measurement gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gap offset is configured improperly, then the measurement gap may not cover the positioning occasion, but configuring the gap offset correctly according to PRS information improves PRS detection performance
Solution Approach 1:
The patent applies preliminary action by pre-calculating the gap offset value based on PRS information (I-PRS and n-PRS) before the measurement process. The base station determines the positioning occasion timing in advance using the formula: positioning occasion occurs at subframe (10 × I-PRS + k × n-PRS), where k is an integer. This pre-calculation ensures the measurement gap is properly aligned with the positioning occasion, eliminating detection failures without requiring complex real-time adjustments.
2Measurement precision
If the terminal performs inter-frequency measurement without accurate gap configuration, then positioning accuracy deteriorates, but with accurate gap configuration based on PRS information, positioning accuracy improves
Solution Approach 1:
The patent applies self-service by enabling the base station to autonomously determine the gap offset value using the PRS information already available in the system. The base station calculates the positioning occasion timing based on I-PRS and n-PRS parameters without requiring additional signaling or manual configuration. This self-determination approach ensures accurate positioning measurements while minimizing configuration overhead and time loss.
3Reliability
If multiple measurement gaps are configured to cover different positioning occasions, then PRS detection reliability improves, but the complexity of gap management increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the gap offset parameter based on the specific PRS configuration (I-PRS and n-PRS values) of each measured cell. Rather than using fixed or multiple static gap configurations, the system calculates an optimized gap offset value for each cell's positioning occasion pattern. This parameter adaptation ensures reliable PRS detection while simplifying gap management through a unified, flexible configuration approach.
Data Source
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AI summary
The present invention pertains to the field of radio communication technologies, and discloses a measurement gap configuration method and a communication apparatus. The method includes: determining a gap offset according to positioning reference signal PRS information of a cell engaged in positioning, or determining, according to the PRS information of the cell engaged in the positioning or frequency information of the cell engaged in the positioning, information used for obtaining a gap offset; sending the gap offset or the information used for obtaining a gap offset to a base station of a serving cell. A base station receives a gap offset or information used for obtaining a gap offset sent by a terminal or a positioning center; the base station sends gap configuration information to the terminal, where the gap configuration information includes the received gap offset or the gap offset determined according to the information used for obtaining a gap offset. With the present invention, the gap offset is determined according to the PRS information of the cell engaged in the positioning, so that the probability that the terminal detects, within a measurement gap, the PRS of the cell engaged in the positioning is improved, and PRS detection performance is improved.