SRS Hopping Pattern Reduces Interference in 5G Terminal Devices
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Solution Overview
Problem
In 5G systems, the interference between SRS signals from different terminal devices is significant due to the selection of the same resources for SRS transmission, leading to continuous strong interference.
Innovation Solution
Terminal devices determine their own exclusive hopping patterns to randomize resource allocation for SRS transmission across multiple time-domain resource units, ensuring that each device uses different frequency-domain or code resources, reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple terminal devices select the same time-domain resource units for SRS transmission, then resource utilization is improved, but continuous strong interference is generated between different terminal devices
Solution Approach 1:
The patent applies dynamics by making the frequency-domain resources dynamic and time-varying through hopping patterns. Instead of static resource allocation, terminal devices hop across different frequency resources across multiple time-domain resource units, transforming the resource allocation from static to dynamic to reduce persistent interference.
Solution Approach 2:
The patent implements periodic action through configured hopping patterns that periodically change the frequency-domain resources used for SRS transmission. The hopping pattern creates a periodic structure where terminal devices systematically switch between different frequency resources, ensuring that interference is distributed over time rather than concentrated continuously.
2Device complexity
If terminal devices use fixed frequency-domain resources for SRS transmission, then device complexity is reduced, but interference randomization is insufficient
Solution Approach 1:
The patent applies preliminary action by pre-configuring hopping patterns through higher-layer signaling before actual SRS transmission begins. The network device provides terminal devices with hopping pattern configurations in advance, so that when transmission occurs, devices can directly follow the predetermined pattern without real-time complex calculations, reducing operational complexity while achieving interference randomization.
Solution Approach 2:
The patent implements parameter changes by varying frequency-domain resource parameters according to predefined hopping patterns. The hopping pattern specifies how frequency resources change across different time-domain resource units, transforming fixed resource allocation into parameter-varying allocation to reduce interference while maintaining manageable complexity through standardized parameter changes.
3Adaptability or versatility
If aperiodic SRS is triggered via DCI with independent resource configuration, then transmission flexibility is improved, but resource conflict with periodic SRS may occur
Solution Approach 1:
The patent applies universality by making the hopping pattern mechanism applicable to both periodic and aperiodic SRS transmissions. The same hopping pattern framework can be configured for different SRS types, allowing the system to handle multiple transmission scenarios with a unified resource allocation mechanism, thereby reducing resource conflicts while maintaining flexibility.
Solution Approach 2:
The patent uses the hopping pattern configuration as an intermediary layer between the DCI trigger and the actual resource allocation. The hopping pattern acts as a mediator that translates the aperiodic trigger into specific time-frequency resources, providing a systematic way to avoid conflicts with periodic SRS resources while maintaining the flexibility of aperiodic transmission.
Data Source
AI summary
Disclosed are a method for transmitting a sounding reference signal, a terminal device and a network device. The method comprises: a terminal device determining, in a first time-domain resource unit, a plurality of second time-domain resource units for sending a sounding reference signal (SRS) of the terminal device; the terminal device determining, according to a frequency hopping pattern of the terminal device, a target resource for sending the SRS on the plurality of second time-domain resource units; and the terminal device sending, according to the target resource, the SRS to a network device. The present invention reduces the interference of SRS signals between different terminal devices, and also avoids the occurrence of a continuous strong interference situation between terminal devices.