Positioning Measurement Report Transmission Latency Reduction
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Solution Overview
Problem
The existing LTE positioning system experiences significant latency in reporting positioning measurement due to delays in scheduling request transmission, UL grant allocation, and scheduling delays, which are critical components of the positioning service latency, especially in stringent latency requirements for NR positioning use cases.
Innovation Solution
An enhanced measurement report mechanism is introduced in the NR positioning system, where the UE requests UL resources in advance through a report assisted message, allowing for immediate transmission of positioning measurement reports after data generation, suitable for both one-shot and periodic reporting, and enabling the base station to allocate periodic UL resources accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE uses traditional scheduling request transmission in LTE system, then the positioning measurement report can be transmitted through standardized procedures, but significant latency is introduced due to SR_delay, UL_grant_delay, and scheduling_delay
Solution Approach 1:
The patent applies preliminary action by having the UE transmit a scheduling request and receive a UL grant in advance, before the actual positioning measurement report needs to be sent. This pre-allocation of uplink resources eliminates the need for real-time scheduling delays, allowing the UE to immediately transmit the measurement report when data becomes available, thus reducing SR_delay and scheduling_delay while maintaining reliable transmission through standardized procedures
2Ease of operation
If the UE waits for periodic PUCCH resources for SR transmission, then the scheduling procedure follows standardized timing, but additional waiting time is introduced according to configured periodicity
Solution Approach 1:
The patent applies preliminary action by allowing the UE to transmit a scheduling request immediately when positioning measurement data becomes available, rather than waiting for the next periodic PUCCH opportunity. The base station receives this advance request and provides a UL grant in advance, enabling the UE to bypass the periodic waiting delay while still following standardized scheduling procedures, thus reducing SR_delay without compromising ease of operation
Solution Approach 2:
The patent applies dynamics by making the scheduling request mechanism flexible rather than strictly periodic. The UE can dynamically trigger a scheduling request when positioning measurement data is ready, and the base station dynamically adjusts the UL grant timing accordingly. This dynamic approach allows the system to adapt to actual positioning needs rather than being constrained by fixed periodicity, reducing unnecessary waiting time while maintaining standardized procedure simplicity
Data Source
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AI summary
Methods and apparatus for transmitting positioning measurement report are provided. The method comprises a step of receiving a location information request from a serving base station or from a location server, a step of determining timing for transmitting a positioning measurement report, a step of generating a report assisted message based on the determined timing for transmitting the positioning measurement report, and a step of transmitting the report assisted message to the serving base station. The key idea of this disclosure is requesting UL resources for positioning measurement report in advance by transmitting a report assisted message. Consequently, the UE can transmit the positioning measurement report just after the measurement data being generated. The disclosure can minimize the delay from positioning measurement data generation to the positioning measurement report.