Subband Full-Duplex SRS Configuration for Self-Interference Control
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Solution Overview
Problem
In full duplex operations of wireless communication systems like 5G NR, issues such as self-interference and jamming from neighboring stations degrade the effectiveness of sounding reference signal (SRS) measurements, which are crucial for uplink and downlink channel estimation.
Innovation Solution
The method involves configuring SRS transmissions at disjoint frequency locations within a component carrier, utilizing bandwidth parts and resource bandwidths with priority values, and enabling simultaneous or frequency division multiplexing of SRS signals to manage transmit power and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex operations are implemented to enable simultaneous uplink and downlink transmissions, then spectral efficiency and network capacity are improved, but self-interference and jamming from neighboring stations degrade SRS measurement accuracy
Solution Approach 1:
The patent segments the frequency spectrum into multiple bandwidth parts (BWPs) within a component carrier, assigning different SRS transmissions to disjoint frequency locations. This segmentation allows the system to maintain full duplex operations while isolating SRS measurements from self-interference by transmitting SRS in specific frequency segments that are protected from uplink-downlink interference.
Solution Approach 2:
The patent applies local quality by configuring different SRS transmission parameters (such as frequency location, bandwidth, and timing) for different bandwidth parts within the same component carrier. Each BWP can be optimized for specific measurement purposes, with disjoint frequency locations providing localized measurement regions that are immune to full duplex interference.
2Measurement precision
If multiple SRS transmissions are configured at different frequency locations to improve channel estimation, then measurement coverage is enhanced, but transmit power requirements increase
Solution Approach 1:
The patent implements partial action by configuring SRS transmissions only in specific disjoint frequency locations rather than across the entire spectrum. This selective approach provides sufficient channel estimation coverage for full duplex operations while limiting the total transmit power required, as not all frequency resources need to be sounded simultaneously.
Solution Approach 2:
The patent changes transmission parameters (frequency location, bandwidth part assignment, resource allocation) to optimize the trade-off between measurement accuracy and power consumption. By adjusting these parameters, the system can achieve adequate channel estimation for full duplex operation without requiring maximum power across all frequency resources.
3Productivity
If simultaneous SRS transmissions are enabled in disjoint frequency locations to improve measurement efficiency, then measurement time is reduced, but interference management complexity increases
Solution Approach 1:
The patent segments the component carrier into multiple bandwidth parts with disjoint frequency locations, allowing simultaneous SRS transmissions in each segment. This segmentation simplifies interference management by providing clear frequency separation, where each BWP can be independently configured and managed without complex interference coordination between overlapping transmissions.
Data Source
AI summary
Techniques are provided for utilizing sounding reference signals (SRS) in full duplex scenarios. An example method for facilitating a measurement of a propagation channel in a wireless network includes receiving first sounding reference signal configuration information associated with a first frequency location in the component carrier, receiving second sounding reference signal configuration information associated with a second frequency location in the component carrier, wherein the second frequency location is disjoint from the first frequency location in the component carrier, and transmitting a first sounding reference signal and a second sounding reference signal based on the respective first sounding reference signal configuration information and the second sounding reference signal configuration information.