Uplink Positioning Timing Alignment for 5G Interference Control
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Solution Overview
Problem
In high-frequency 5G communication scenarios, the shorter cyclic prefix (CP) leads to symbol offsets exceeding the CP length, causing interference and affecting positioning performance and communication in adjacent measurement nodes.
Innovation Solution
A method is implemented to estimate time advances (TAs) of multiple measurement nodes, using a positioning server to send positioning instructions to measurement nodes, which trigger target nodes to send random access signals, allowing for accurate positioning and reducing interference by aligning signal arrival times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If LTE uplink reference signal send mechanism is used in 5G high frequency band, then positioning functionality is achieved, but communication interference occurs to other target nodes in adjacent measurement nodes
Solution Approach 1:
The patent changes the timing parameters of uplink reference signals by introducing time advance (TA) estimation and adjustment. By estimating TA values for different measurement nodes and adjusting the transmission timing of reference signals accordingly, the patent ensures that signals from different target nodes arrive at adjacent measurement nodes within the cyclic prefix window, preventing inter-symbol interference while maintaining positioning accuracy
Solution Approach 2:
The patent performs preliminary time advance estimation and compensation before the actual positioning measurement. The network estimates TA values for multiple measurement nodes in advance, calculates appropriate timing adjustments, and configures these parameters to target nodes before they transmit reference signals. This preliminary timing alignment prevents interference issues during the actual positioning process
2Productivity
If multiple measurement nodes receive signals from the same target node simultaneously, then positioning measurement is enabled, but signal overlap causes interference in adjacent measurement nodes
Solution Approach 1:
The patent applies different timing adjustment parameters to different measurement nodes based on their local characteristics. Each measurement node receives a customized time advance value that accounts for its specific geometric relationship with the target node. This localized timing adjustment ensures that while all measurement nodes can simultaneously perform positioning measurements, each node receives properly timed signals without causing interference to adjacent nodes
Data Source
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AI summary
Provided are a method and an apparatus for implementing uplink positioning and a storage medium. The method includes: sending a first positioning instruction to a first measurement node set, where the first measurement node set includes at least three measurement nodes and a target node is located within a coverage range of the measurement nodes; receiving first positioning attribute information fed back by each measurement node and corresponding to the first positioning instruction, where the first positioning attribute information includes a measurement node identity and random access information of a cell where the measurement node is located; and sending a random access instruction carrying the first positioning attribute information to the target node, where the random access instruction is configured to trigger the target node to send a random access signal to the each measurement node to determine a communication distance between the target node and the each measurement node.