Sounding Reference Signal Transmission Using Segmented Frequency Resources
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Solution Overview
Problem
Existing wireless communication systems face challenges in transmitting sounding reference signals (SRS) efficiently, particularly in scenarios where a transmission time interval (TTI) shorter than one subframe is required, which affects backward compatibility with legacy LTE systems and interferes with other SRS transmissions.
Innovation Solution
A method for transmitting a sounding reference signal (SRS) from user equipment (UE) to a base station using a TTI shorter than one subframe, where the transmission time point is determined based on the TTI length, and the frequency resource is configured independently of conventional SRS transmissions, allowing for non-overlapping frequency allocation and potential cyclic-shifting or puncturing of the SRS within a limited frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a TTI shorter than one subframe is used for SRS transmission, then transmission speed and responsiveness are improved, but backward compatibility with legacy LTE systems deteriorates
Solution Approach 1:
The patent segments the frequency resources into different regions: a first frequency region for short TTI SRS transmission and a second frequency region for conventional subframe-based SRS transmission. This segmentation allows the system to support both short TTI and legacy LTE operations simultaneously without mutual interference, thereby improving transmission speed while maintaining backward compatibility.
2Reliability
If independent frequency resource configuration is used for short TTI SRS, then interference with conventional SRS is reduced, but frequency resource management complexity increases
Solution Approach 1:
The patent applies local quality by assigning specific frequency regions to specific SRS types: the first frequency region is dedicated to short TTI SRS while the second frequency region is dedicated to conventional SRS. This localized resource allocation ensures that each SRS type operates in its own frequency domain with appropriate characteristics, reducing interference while maintaining manageable complexity through clear resource partitioning.
Data Source
AI summary
Disclosed are a method for transmitting a sounding reference signal to a base station by a terminal and an apparatus for supporting the same. Particularly, disclosed is a sounding reference signal transmission method comprising: determining a transmission time point of a first SRS within a first TTI, which has a length shorter than the length of one subframe, on the basis of the first TTI; and transmitting the first SRS at the determined transmission time point, wherein a frequency resource at which the first SRS is transmitted is configured independently from a frequency resource at which a second SRS based on a second TTI having a length corresponding to the length of one subframe is transmitted.