Positioning Node Non-Contiguous Uplink Measurement
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Solution Overview
Problem
Current LTE positioning systems face challenges in accurately performing uplink positioning measurements, particularly when wireless devices use multi-cluster or non-contiguous transmission configurations, leading to increased positioning errors or failures due to the measuring node's inability to receive scheduling information and interference issues.
Innovation Solution
The proposed solution involves a positioning node that obtains information about the wireless device's non-contiguous transmission configuration and adjusts its measurement methods to perform downlink positioning measurements when multi-cluster transmission is used, and utilizes specific scheduling algorithms and interference coordination to enhance positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If uplink positioning measurements are performed when wireless devices use multi-cluster or non-contiguous transmission configurations, then positioning coverage and flexibility are improved, but measurement accuracy deteriorates due to the measuring node's inability to receive scheduling information and interference issues
Solution Approach 1:
The patent introduces an intermediary mechanism where the measuring node receives scheduling information about non-contiguous uplink transmissions through downlink control information (DCI) or higher layer signaling. This intermediary information transfer enables the measuring node to correctly identify and measure positioning signals even when they are transmitted in non-contiguous resource blocks, thereby resolving the contradiction between configuration flexibility and measurement accuracy
Solution Approach 2:
The patent changes the measurement approach by adapting the measuring node's reception parameters based on the non-contiguous transmission configuration. Specifically, the measuring node adjusts its resource allocation expectations and signal detection parameters to match the non-contiguous resource block pattern, allowing accurate measurement despite the fragmented transmission structure
2Area of stationary object
If the measuring node attempts to perform positioning measurements on non-contiguous uplink transmissions without scheduling information, then measurement coverage is maintained, but reliability deteriorates due to interference and inability to detect signals
Solution Approach 1:
The patent applies preliminary action by providing the measuring node with scheduling information about non-contiguous uplink transmissions before the actual positioning measurement takes place. This advance information allows the measuring node to prepare its reception parameters and correctly identify the resource blocks where positioning signals will be transmitted, thereby maintaining both coverage and reliability
3Measurement precision
If downlink positioning measurements are used instead of uplink measurements when multi-cluster transmission is configured, then measurement accuracy is improved, but the positioning method flexibility deteriorates
Solution Approach 1:
The patent implements a dynamic positioning method selection mechanism that adapts to the wireless device's transmission configuration. When non-contiguous or multi-cluster transmission is detected, the system dynamically switches to downlink positioning measurements or adjusts uplink measurement parameters accordingly. This dynamic adaptation maintains measurement accuracy while preserving positioning method flexibility through conditional selection
Data Source
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AI summary
Some embodiments herein disclose a method in a second node (12,13) for performing a positioning measurement on at least uplink signals transmitted by a wireless device (10) served by a first node (12) in a wireless communication network (1). The second node (12,13) obtains information related to a non-contiguous uplink configuration associated with a carrier frequency, wherein the non-contiguous uplink configuration further comprises one or more multi-cluster uplink transmissions from the wireless device (10). Furthermore, the second node (12,13) performs a positioning measurement on at least signals transmitted by the wireless device (10) in the one or more multi- cluster transmissions determined based on the obtained information.