Sidelink Reference Signal Slot Layout for Accurate Positioning
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Solution Overview
Problem
Existing sidelink transmission protocols do not support the transmission of positioning-related reference signals, such as PRS or SRS, necessitating new mechanisms for reference signal transmission on sidelinks to meet the requirements of larger bandwidths for improved positioning accuracy.
Innovation Solution
Configuring a target slot with symbols for automatic gain control (AGC) and transmission/reception (Tx/Rx) switching, allowing for multiple symbols for AGC and/or Tx/Rx switching to accommodate larger bandwidth positioning-related reference signals, and using sidelink control information (SCI) to indicate slot usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing sidelink transmission protocol is used, then device complexity is low, but positioning accuracy cannot be improved due to lack of positioning-related reference signal transmission support
Solution Approach 1:
The patent extends the existing sidelink transmission protocol to support multiple functions: both data transmission and positioning-related reference signal transmission share the same protocol framework. This allows the system to achieve positioning accuracy improvements without creating entirely new complex systems, by making the existing protocol universal enough to handle both purposes.
Solution Approach 2:
The patent segments the slot into distinct symbol regions: a first symbol region for AGC and a second symbol region for Tx/Rx switching, with positioning-related reference signals transmitted in between. This segmentation allows the system to maintain manageable complexity by dividing the transmission timeline into functional segments, each with specific purposes.
2Measurement precision
If larger bandwidth is used for positioning-related reference signal, then positioning accuracy is improved, but AGC and Tx/Rx switching time becomes insufficient
Solution Approach 1:
The patent divides the slot into distinct time segments: a first symbol region dedicated to AGC, a second symbol region for Tx/Rx switching, and intermediate regions for positioning-related reference signal transmission. This segmentation ensures that adequate time is allocated to each function, allowing larger bandwidth signals to be transmitted while maintaining sufficient AGC and switching time.
Solution Approach 2:
The patent performs AGC in advance during the first symbol region before the positioning-related reference signal transmission begins. This preliminary action ensures that the receiver is properly prepared to handle the larger bandwidth signal, and the AGC adjustment is completed before the actual signal reception starts, preventing time conflicts.
3Adaptability or versatility
If multiple symbols are allocated for AGC and Tx/Rx switching, then positioning-related reference signal transmission is enabled, but slot structure complexity increases
Solution Approach 1:
The patent segments the slot into standardized regions: first symbol region for AGC, second symbol region for Tx/Rx switching, and intermediate regions for signal transmission. This segmentation approach enables positioning signal transmission capability while maintaining a relatively simple and standardized slot structure that can be easily implemented.
Solution Approach 2:
The patent allows flexible configuration of the number of first symbols and second symbols based on specific transmission needs. This parameter change capability enables the system to adapt to different positioning scenarios while maintaining a consistent basic slot structure, balancing versatility with structural simplicity.
4Ease of operation
If fixed slot structure is used for sidelink transmission, then implementation is simple, but flexibility in resource allocation for positioning signals is limited
Solution Approach 1:
The patent introduces configurable parameters including the number of first symbols, number of second symbols, and their positions within the slot. These parameters can be adjusted based on specific transmission requirements, allowing the system to maintain implementation simplicity through a fixed basic structure while achieving flexibility through parameter configuration.
Solution Approach 2:
The patent creates a dynamic slot structure where the allocation of symbols for AGC, Tx/Rx switching, and signal transmission can be adjusted based on transmission needs. This dynamic capability allows the same basic slot structure to adapt to different positioning scenarios, maintaining ease of operation while improving resource allocation flexibility.
Data Source
AI summary
A method and an apparatus for positioning-related reference signal transmission and reception, and a terminal are provided. The method for transmission includes the following. A positioning-related reference signal is transmitted in at least some of symbols between a first symbol and a second symbol in a target slot, where the first symbol is used for automatic gain control (AGC), and the second symbol is used for transmission/reception (Tx/Rx) switching.