Carrier Phase Positioning with Time-Stamped Symbol Reference

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Solution Overview

Problem

Existing carrier phase-based positioning methods lack a definitive method to determine or indicate the symbol position corresponding to the carrier phase measurement value, leading to inaccuracies in positioning.

Innovation Solution

Reporting a time stamp corresponding to the carrier phase measurement value, which includes a slot identifier and symbol identifier, to indicate the time position of the measurement, thereby improving accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If carrier phase measurement is performed without time stamp, then the measurement process is simple, but the positioning accuracy deteriorates due to ambiguity in symbol position

Engineering Contradiction:

Improvepositioning accuracyVSAvoidmeasurement reporting complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-defining the relationship between time stamps and symbol positions in the communication protocol. The time stamp is generated in advance based on the slot and symbol identifiers, establishing a clear temporal reference before the positioning measurement occurs. This preliminary setup eliminates ambiguity during the actual measurement process without adding complexity to the measurement itself.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The time stamp acts as an intermediary element that bridges the carrier phase measurement and the symbol position identification. Instead of directly measuring symbol position (which would be complex and ambiguous), the time stamp serves as a mediator that clearly indicates when the measurement was taken, allowing the receiving end to accurately determine the corresponding symbol position and improve positioning accuracy.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If time stamp is added to carrier phase measurement, then positioning accuracy is improved, but the information transmission complexity increases

Engineering Contradiction:

Improvecarrier phase measurement accuracyVSAvoidinformation transmission overhead

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent applies parameter changes by using a compact time stamp format that encodes temporal information efficiently. Instead of transmitting full temporal data or complex synchronization signals, the time stamp uses condensed parameters (slot identifier and symbol identifier) that provide sufficient precision for positioning while minimizing information overhead. This changes the representation of temporal information from verbose to concise, maintaining accuracy while reducing transmission burden.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4712602A1Communication methods, apparatuses and devices, and storage mediums

Publication Date: 2026.03.18 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

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AI summary

The present disclosure relates to communication methods, apparatuses and devices, and storage mediums. A method comprises: sending first information, the first information comprising a carrier phase measurement value and a timestamp. The present disclosure reports the timestamp corresponding to the carrier phase measurement value, so as to indicate a time position for carrier phase measurement, improving carrier phase-based positioning precision.