Sidelink Positioning Signal Scheduling Through Reused DCI Formats
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Solution Overview
Problem
Existing mobile communication technologies lack effective solutions for scheduling and indicating the transmission of positioning reference signals in sidelink-based positioning, particularly in scenarios involving unlicensed spectrum and out-of-coverage areas, which hinders the flexibility and accuracy of sidelink-based positioning.
Innovation Solution
A method and apparatus for control information transmission that allows a terminal device to receive and a network device to transmit control information for scheduling sidelink information, including positioning reference signals, using new or existing DCI formats, with specific RNTIs for enhanced accuracy and flexibility in sidelink-based positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing mobile communication technologies are used for sidelink positioning, then basic communication functionality is maintained, but scheduling and indicating transmission of positioning reference signals is ineffective, reducing positioning accuracy and flexibility
Solution Approach 1:
The patent reuses existing DCI formats (3_0 and 3_1) that were originally designed for other sidelink communication purposes, and adapts them to also carry positioning reference signal scheduling information. This allows the same control structures to serve multiple functions: both general sidelink resource scheduling and specific positioning signal scheduling, thereby improving positioning accuracy without sacrificing communication flexibility
Solution Approach 2:
The patent modifies specific parameters within existing DCI formats by introducing new fields (such as SL-PRS resource indication fields) and reconfiguring existing fields to carry positioning-specific information. These parameter changes enable the system to accurately schedule positioning reference signals while maintaining compatibility with existing sidelink communication frameworks
2Measurement precision
If new DCI formats are designed specifically for positioning reference signal scheduling, then positioning accuracy is improved, but control information complexity increases
Solution Approach 1:
The patent makes existing DCI formats multi-functional by enabling them to carry both traditional sidelink scheduling information and positioning reference signal scheduling information through the introduction of optional indication fields. This approach improves positioning accuracy while avoiding the complexity of designing entirely new control formats
Solution Approach 2:
The patent copies and adapts existing DCI format structures (3_0 and 3_1) for positioning purposes rather than creating new formats from scratch. By reusing proven control information structures and adding only the necessary positioning-specific fields, the patent achieves accurate positioning scheduling while minimizing the increase in system complexity
3Device complexity
If existing DCI formats are reused for positioning reference signal scheduling, then device complexity is reduced, but positioning accuracy and flexibility may be compromised
Solution Approach 1:
The patent carefully modifies parameters within existing DCI formats by introducing specific indication fields for SL-PRS resource scheduling. These targeted parameter changes enable accurate positioning reference signal scheduling while maintaining the simplicity and proven reliability of existing DCI format structures
Solution Approach 2:
The patent enhances existing DCI formats to serve dual purposes: traditional sidelink communication scheduling and positioning reference signal scheduling. This multi-functionality approach maintains device simplicity while achieving the positioning accuracy needed for out-of-coverage and unlicensed spectrum scenarios
4Ease of operation
If sidelink positioning is implemented without dedicated control information, then ease of operation is maintained, but positioning reliability deteriorates in out-of-coverage and unlicensed spectrum scenarios
Solution Approach 1:
The patent enables existing DCI formats to simultaneously handle general sidelink operations and positioning-specific scheduling. This approach maintains operational simplicity by reusing familiar control structures while improving positioning reliability through dedicated indication fields that ensure accurate scheduling of positioning reference signals even in challenging out-of-coverage and unlicensed spectrum environments
Data Source
AI summary
A method and apparatus for control information transmission are provided. The method is performed by a terminal device, which includes: receiving control information, the control information is for indicating or scheduling transmission of sidelink information on sidelink; the sidelink information includes positioning reference signal.