Positioning SRS Hopping Across Frequency Bands With Overlap Dropping
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately and efficiently transmitting and receiving signals due to overlapping time resources and frequency bands, which can lead to signal interference and reduced efficiency.
Innovation Solution
A method and device for transmitting and receiving wireless signals by configuring sounding reference signals (SRS) for positioning through radio resource control (RRC) signaling, allowing hopping among multiple SRS frequency bands and time resource sets, and dropping SRS transmission in overlapping time resources to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SRS transmission is performed in all configured time resources, then positioning accuracy is improved, but signal interference occurs when time resources overlap with other signals
Solution Approach 1:
The terminal performs preliminary checking of time resource overlap between SRS and other signals before transmission. Configuration information is received in advance through RRC signaling, and the terminal proactively identifies overlapping time resources to determine which SRS transmissions should be dropped, preventing interference before it occurs.
Solution Approach 2:
The patent extracts and removes SRS transmissions from time resources that overlap with other signals. By identifying overlapping time resources and selectively dropping SRS transmissions in those specific time slots, the harmful interfering signals are taken out from the system, while SRS transmissions in non-overlapping time resources continue uninterrupted.
2Measurement precision
If SRS hopping is performed among multiple frequency bands, then positioning accuracy is improved, but device complexity increases due to frequency re-tuning requirements
Solution Approach 1:
The SRS frequency band is segmented into multiple hopping frequency bands. The terminal transmits SRS in different frequency bands at different time resources according to hopping patterns, dividing the wideband positioning task into multiple narrowband transmissions that can be sequentially performed with frequency re-tuning.
Solution Approach 2:
The frequency band for SRS transmission is made dynamic through hopping. The terminal dynamically switches between different frequency bands based on time resource allocation and hopping patterns, allowing the system to adaptively use multiple frequency bands for positioning while managing frequency re-tuning requirements.
3Object-affected harmful factors
If SRS transmission is dropped in overlapping time resources, then signal interference is avoided, but positioning efficiency decreases due to reduced SRS transmission opportunities
Solution Approach 1:
The SRS transmission strategy is made local to specific time resources. Instead of uniformly transmitting or dropping SRS across all time resources, the terminal applies local decisions based on overlap conditions for each time resource, transmitting SRS in non-overlapping resources and dropping only in overlapping resources.
Solution Approach 2:
The patent uses multiple SRS time resource sets as copies or alternatives. When SRS transmission is dropped in one time resource set due to overlap, other non-overlapping time resource sets serve as copies that can provide positioning measurements, maintaining positioning efficiency through redundant time resources.
Data Source
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AI summary
A method by which a terminal transmits a sounding reference signal (SRS) in a wireless communication system, according to at least one of the embodiments disclosed in the present specification, comprises: receiving, through radio resource control (RRC) signaling, configuration information about an SRS for positioning; and transmitting the SRS for positioning on the basis of hopping of a plurality of SRS frequency bands, wherein the plurality of SRS frequency bands for hopping are linked to each SRS time resource set including a plurality of time resources, and the terminal can drop, on the basis that one part of the first SRS time resource set at least partially overlaps a time period configured for other signals, the SRS for positioning in all of the plurality of time resources included in a first SRS time resource set.