Relay UE Measurement Reporting for Accurate Path Switching
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Solution Overview
Problem
The accuracy of deciding whether a remote user equipment (UE) should perform path switch or relay UE reselection is low due to inconsistencies between SL-RSRP and SD-RSRP measurements, leading to inaccurate network device decisions.
Innovation Solution
The remote device sends a measurement report to the network device, including first indication information that distinguishes between SL-RSRP and SD-RSRP, along with pathloss information, to improve decision accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the remote device measures SL-RSRP for serving relay UE and SD-RSRP for candidate relay UE, then the measurement process is simple, but the decision accuracy of path switch is low due to inconsistency between measurement types
Solution Approach 1:
The patent applies local quality by making the measurement type consistent with the relay UE role. For serving relay UE, SL-RSRP is used; for candidate relay UE, SD-RSRP is used. This localized adaptation of measurement types to specific functional contexts resolves the inconsistency problem while maintaining operational simplicity.
Solution Approach 2:
The patent changes the measurement parameter based on the relay UE status. When a candidate relay UE becomes the serving relay UE, the measurement type transitions from SD-RSRP to SL-RSRP. This parameter change ensures consistency between measurement types and relay UE roles, improving decision accuracy without complicating the measurement process.
2Use of energy by moving object
If power control is performed on SL unicast data based on SL pathloss, then transmit power is optimized, but SL-RSRP becomes inconsistent with SD-RSRP leading to inaccurate measurement results
Solution Approach 1:
The patent applies local quality by matching measurement types to transmission types. SL-RSRP is used for serving relay UE (with power control), and SD-RSRP is used for candidate relay UE (without power control). This localized measurement approach accounts for the different power control conditions, ensuring measurement results accurately reflect actual channel quality.
Solution Approach 2:
The patent segments the measurement process into two distinct paths: one for serving relay UE using SL-RSRP and another for candidate relay UE using SD-RSRP. This segmentation allows each measurement type to be optimized for its specific context, resolving the inconsistency caused by differential power control while maintaining overall system efficiency.
3Device complexity
If the network device decides path switch based on measurement results without considering measurement type, then the decision process is simple, but the decision accuracy is low
Solution Approach 1:
The patent applies universality by creating a unified decision framework that handles both SL-RSRP and SD-RSRP measurement types. The network device receives measurement results with associated measurement type indicators and applies appropriate decision logic for each type, achieving accurate path switch decisions without significantly increasing decision process complexity.
Data Source
AI summary
This application relates to a communication method and apparatus. A remote device receives measurement configuration information, which is used to configure a measurement event. The measurement event is an event that signal quality of a candidate relay device becomes a first offset better than signal quality of a serving relay device. The remote device sends, to a network device, a measurement report including a first measurement result and first indication information. The first measurement result is a result of measurement performed by the remote device based on the measurement event, and the first indication information indicates a measurement type corresponding to the first measurement result. The measurement report sent by the remote device to the network device may include the first indication information, to indicate the measurement type corresponding to the measurement result.