Positioning SRS Bandwidth Aggregation Across Carriers for 5G Location
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently aggregating bandwidth for uplink reference signals, particularly in high-density mobile broadband environments, leading to suboptimal positioning accuracy and increased latency.
Innovation Solution
User equipment receives configuration information for bandwidth aggregation of positioning sounding reference signals across multiple component carriers and transmits them at designated times, allowing the network to determine arrival times and perform bandwidth aggregation for precise position estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If bandwidth aggregation is implemented for uplink reference signals across multiple component carriers, then position estimation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the bandwidth aggregation process into distinct components: configuration information transmission, SRS signal transmission on multiple CCs, arrival time determination, and position estimation. This segmentation allows the complex task of position estimation using aggregated bandwidth to be broken down into manageable steps that can be implemented systematically in the UE and network.
Solution Approach 2:
The patent introduces configuration information as an intermediary element that carries control parameters between the network and UE. This configuration information includes parameters for identifying component carriers, indicating SRS transmission, and providing timing advance, which mediates the complex interaction required for bandwidth aggregation across multiple carriers.
2Productivity
If multiple component carriers are used for SRS transmission, then network capacity is improved, but timing-related measurement complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network transmit configuration information before the actual SRS transmission. This configuration information pre-provides parameters for identifying component carriers and timing advance, allowing the UE to prepare for synchronized transmission across multiple carriers without increasing measurement complexity during the actual positioning operation.
Solution Approach 2:
The patent implements feedback mechanisms where the network determines arrival times of SRS signals from multiple component carriers and uses this information for position estimation. The configuration information also includes timing advance parameters that are adjusted based on network conditions, creating a feedback loop that maintains measurement accuracy while supporting higher network capacity.
3Loss of time
If bandwidth aggregation is implemented, then latency is reduced, but signaling complexity increases
Solution Approach 1:
The patent merges multiple functions into the configuration information transmission: it combines carrier identification, SRS transmission indication, timing advance parameters, and bandwidth aggregation parameters into a single signaling mechanism. This merging reduces the number of separate signaling messages and decreases overall latency while managing signaling complexity through consolidation.
Data Source
AI summary
Apparatuses, systems, and methods for bandwidth aggregation of positioning sounding reference signals (positioning SRS), e.g., in 5G NR systems and beyond. A UE may report, to a network one or more capabilities associated with bandwidth aggregation for a positioning procedure for location estimation. The UE may receive, from the network, configuration information and/or scheduling information. The UE may select frequencies for transmission of positioning SRS and may transmit positioning SRS on the selected frequencies. The network may aggregate the positioning SRS over a range of bandwidth to estimate a location of the UE.