Group Positioning Reference Signal Coordination for Wireless UE Overhead Reduction
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in performing UE positioning sessions, particularly in reducing power consumption and communication resource usage when conducting pair-wise UE positioning sessions, which increases overhead and resource utilization.
Innovation Solution
A method where a first UE identifies a group of UEs for a positioning session, broadcasts parameters, and configures them to transmit positioning reference signals (PRSs) in a coordinated manner, allowing for simultaneous PRS transmission and reduced overhead by broadcasting positioning information based on received PRSs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If pair-wise UE positioning sessions are conducted individually, then positioning accuracy is maintained, but power consumption and communication resource usage increase
Solution Approach 1:
The patent combines multiple pair-wise UE positioning sessions into a single group positioning session where multiple UEs participate simultaneously. The first UE coordinates PRS transmissions with multiple second UEs in a coordinated manner, allowing positioning measurements to be performed across all pairs within the group during one session, thereby reducing overall power consumption and communication overhead while maintaining positioning accuracy through the same measurement procedures
Solution Approach 2:
The first UE acts as a universal coordinator for multiple second UEs within the positioning group, performing the functions of initiating sessions, configuring parameters, and coordinating PRS transmissions for all members simultaneously. This multi-functional approach allows a single UE to manage positioning for multiple pairs, reducing the total number of individual session initiations and improving resource efficiency
2Ease of operation
If individual unicast pre-PRS messages are sent to each UE, then positioning session setup is complete, but communication overhead increases
Solution Approach 1:
The patent merges the individual unicast pre-PRS message transmissions into a single groupcast message that is broadcast to multiple second UEs simultaneously. The first UE sends one groupcast pre-PRS message containing positioning parameters that all second UEs in the group can use, eliminating the need for separate unicast messages to each UE while ensuring complete session setup for all participants
Solution Approach 2:
The patent segments the positioning group into a coordinating first UE and multiple second UEs, with the first UE responsible for sending the groupcast pre-PRS message. This segmentation allows efficient one-to-many communication where the first UE handles the messaging function for the entire group, reducing overall communication overhead while maintaining proper session initialization for all members
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may identify a plurality of UEs for a UE positioning session. The UE may identify a set of parameters for the UE positioning session. The UE may broadcast information indicating at least the set of parameters for the UE positioning session. The UE may receive, from at least one of the plurality of UEs, a set of positioning reference signals (PRSs) based at least in part on the set of parameters. The UE may broadcast, based at least in part on the set of PRSs, positioning information. Numerous other aspects are provided.