UE Positioning via Paging in Idle Mode
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Solution Overview
Problem
Legacy RAT-dependent UE positioning methods require the UE to be in connected mode, leading to long latency and increased power consumption, as they necessitate establishing and maintaining a connection for positioning, which is inefficient for non-emergency use cases in 5G systems that demand higher accuracy and various positioning parameters.
Innovation Solution
The method involves receiving a paging message with a positioning request and transmitting uplink positioning signals after a predetermined time limit, allowing positioning to be initiated and carried out without the UE being in connected mode, thereby reducing latency and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE enters connected mode to perform positioning, then positioning can be performed with existing RAT-dependent methods, but latency increases and power consumption increases
Solution Approach 1:
The network performs preliminary actions by providing UL resource configuration and positioning signal parameters to the UE while it is in idle mode, before the UE needs positioning services. This allows the UE to transmit positioning signals immediately when needed without first establishing a connected mode, thereby reducing latency while maintaining positioning reliability
Solution Approach 2:
The patent introduces an intermediary mechanism where the network node stores positioning configuration information and the UE stores UL resource configuration locally. These intermediaries enable the UE to perform positioning without establishing a full connected mode, acting as mediators that bridge the gap between idle mode and positioning requirements
2Reliability
If the UE enters connected mode to perform positioning, then positioning can be performed with existing RAT-dependent methods, but power consumption increases
Solution Approach 1:
The network provides UL resource configuration and positioning parameters in advance while the UE is in idle mode. This preliminary action eliminates the need for the UE to transition to connected mode solely for positioning, thereby reducing power consumption while maintaining positioning capability
Solution Approach 2:
Local storage of positioning configuration information in the UE and network node acts as an intermediary, enabling the UE to perform positioning signals without establishing a full connected mode. This intermediary mechanism reduces the energy overhead associated with mode transitions while preserving positioning reliability
3Reliability
If the UE enters connected mode for positioning, then positioning can be performed, but signaling overhead increases
Solution Approach 1:
The network performs preliminary configuration of UL resources and positioning parameters while the UE is in idle mode. This eliminates the need for complex mode transition signaling and connection establishment procedures, reducing signaling overhead while maintaining positioning capability through streamlined idle-mode positioning signals
Data Source
AI summary
Devices and methods for facilitating positioning of a user equipment, UE (10), while the UE remains unconnected to a wireless network. In one aspect, a method performed by the UE is provided, comprising: receiving (S510), from the wireless network (100), a first message (81,84) associated with paging of the UE, wherein said first message identifies a positioning request to transmit uplink positioning signals; transmitting (S540), after expiry of a predetermined first time limit (T1), uplink positioning signals for reception in the wireless network.