Idle-State Uplink Positioning Measurement Without Reconnection
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Solution Overview
Problem
Current 5G mobile communication systems face inefficiencies and high energy consumption when locating terminals in a non-connected state due to the need for terminals to enter a connected state before positioning, which is complex and time-consuming.
Innovation Solution
A positioning measurement method where a first network element sends a broadcast request and measurement request to access network devices, allowing terminals in a non-connected state to send reference signals without re-entering a connected state, enabling access network devices to measure and determine location information based on the received signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal re-enters a connected state for positioning measurement, then positioning accuracy is improved, but positioning delay and energy consumption increase
Solution Approach 1:
The network pre-configures positioning measurement resources (SRS resources, measurement configurations) for the terminal while it is in connected state. These pre-configured resources remain valid when the terminal transitions to idle state, enabling positioning measurements to be performed without re-establishing connection, thus reducing positioning delay while maintaining accuracy
Solution Approach 2:
The patent introduces a positioning measurement management mechanism that acts as an intermediary between the terminal and network. The network can trigger positioning measurements in idle terminals through pre-configured resources, and the terminal can report measurements without full connection re-establishment, mediating between positioning accuracy requirements and delay reduction goals
2Measurement precision
If the terminal re-enters a connected state for positioning measurement, then positioning accuracy is improved, but energy consumption increases
Solution Approach 1:
Positioning measurement resources and configurations are pre-established when the terminal is in connected state. These pre-configured resources include SRS (Sounding Reference Signal) configurations, measurement parameters, and reporting settings. When the terminal enters idle state, it can perform positioning measurements using these pre-configured resources without needing to re-establish connection, significantly reducing energy consumption while maintaining positioning accuracy
Solution Approach 2:
The terminal is empowered to autonomously perform positioning measurements using pre-configured resources while in idle state, without requiring network assistance for resource allocation. The terminal can independently transmit positioning reference signals and report measurements, enabling self-service positioning that reduces energy consumption associated with connection management
3Loss of time
If the terminal remains in non-connected state for positioning, then positioning delay and energy consumption are reduced, but positioning capability is limited
Solution Approach 1:
The network pre-configures comprehensive positioning measurement resources including multiple SRS resource sets, measurement parameters, and reporting configurations before the terminal transitions to idle state. These pre-configured resources provide the terminal with versatile positioning capabilities in idle state, enabling it to perform various positioning measurements (UL-TDOA, UL-AOA) without connection re-establishment, thus expanding positioning capability while maintaining low delay
Solution Approach 2:
The pre-configured positioning measurement resources are designed to support multiple positioning methods and scenarios. The same pre-configured SRS resources can be used for different positioning techniques (time difference of arrival, angle of arrival), and the terminal can adaptively select appropriate measurement methods based on available resources, providing universal positioning capability across different idle state scenarios
Data Source
AI summary
A positioning measurement method and an apparatus are provided. The method includes: after a first network element receives, from a second network element, an indication of obtaining location information of a terminal, the first network element requests at least one access network device to broadcast a message. The terminal starts to send a reference signal upon receiving the message broadcast. The first network element further requests the at least one access network device to measure the reference signal. Upon receiving a measurement request, the access network device measures the received reference signal, to obtain a corresponding measurement result; then sends the measurement result to the first network element. According to the present application, during uplink positioning, a terminal in a non-connected state does not need to re-enter a connected state, thereby reducing a delay for positioning the terminal, reducing energy consumption of the terminal, and improving positioning efficiency.