Coverage-Enhanced Mode for Positioning Session Continuity
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE networks, face challenges in continuing positioning sessions across inter-base station handovers, leading to data loss and delayed measurement results due to the lack of measurement context transfer and communication disruption between base stations.
Innovation Solution
The implementation of a Coverage-Enhanced (CE) mode that allows mobile devices to continue positioning measurements with the serving cell until the session is completed or a timeout occurs, and then report actual handover measurements to enable network entities to make informed handover decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-base station handover is performed in LTE networks, then mobile devices can maintain connectivity during base station changes, but positioning sessions cannot be continued due to lack of measurement context transfer
Solution Approach 1:
The patent applies preliminary action by having the mobile device store measurement context and positioning session data before handover occurs. The device prepares measurement results and positioning information in advance, so that when handover happens, the data is already captured and can be reported to the new base station, preventing data loss and session interruption.
Solution Approach 2:
The patent uses the mobile device itself as an intermediary to bridge the measurement context gap during handover. Instead of relying on base station-to-base station context transfer, the device acts as a mediator that collects, stores, and forwards measurement data to the target base station, enabling positioning session continuity across handovers.
2Measurement precision
If positioning measurements are performed during positioning sessions, then positioning accuracy is improved, but data loss and measurement delays occur during handovers
Solution Approach 1:
The patent ensures continuity of useful action by enabling positioning measurements to continue uninterrupted during handovers. The mobile device maintains measurement activities throughout the handover process, storing results temporarily and ensuring they are transmitted to the target base station, thus eliminating measurement delays and maintaining continuous positioning accuracy.
3Productivity
If small cell deployments are increased to improve coverage and data transfer speeds, then network capacity is enhanced, but the frequency of handovers increases disrupting positioning sessions
Solution Approach 1:
The patent applies preliminary action by having mobile devices prepare and store positioning measurement data before handovers are triggered. In small cell networks where handovers occur frequently, this advance preparation ensures that positioning session data is captured and preserved, allowing the session to resume seamlessly after handover without disruption to positioning stability.
Data Source
AI summary
Disclosed are techniques for performing positioning measurements at a mobile device during a positioning session with a serving cell. In an aspect, the mobile device determines to trigger a coverage-enhanced (CE) mode before a positioning session timeout for the positioning session expires, continues performance of the positioning measurements during the positioning session with the serving cell while the mobile device remains connected to the serving cell due to the triggered CE mode, determines whether the positioning measurements have been completed or the positioning session timeout has expired, and responsive to the determination that the positioning measurements have been completed or that the positioning session timeout has expired, reports, to a network entity in the wireless communications network, actual handover measurements to enable the network entity to make a handover determination.