SRS Frequency Reconfiguration for Interference-Aware NR Uplink
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently adapting sounding reference signal (SRS) frequency domain parameters, which affects the performance of LTE and New Radio (NR) networks, particularly in managing interference and optimizing resource utilization.
Innovation Solution
A first network node dynamically adapts SRS frequency domain parameters by receiving and transmitting modified configurations and messages with other network nodes, allowing for dynamic reconfiguration of SRS resources to optimize communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If static SRS frequency domain parameters are used, then configuration simplicity is maintained, but communication efficiency and interference management performance deteriorate
Solution Approach 1:
The patent applies dynamics by transitioning from static to dynamic SRS frequency domain parameters. The network node dynamically adjusts parameters such as frequency hopping patterns, comb offsets, and bandwidth configurations based on real-time channel conditions and interference levels. This enables the system to adapt to changing network environments, improving communication efficiency while managing interference through continuous parameter optimization.
Solution Approach 2:
The patent implements parameter changes by modifying frequency domain parameters of SRS signals. Specific parameters including frequency shift, comb configuration, and bandwidth are adjusted based on channel quality indicators and interference measurements. This allows the system to optimize resource utilization and reduce interference by changing parameters rather than adding complexity to the fundamental system structure.
2Reliability
If dynamic SRS frequency domain parameters are implemented, then interference management improves, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent applies feedback mechanisms where the network node continuously monitors channel conditions and interference levels, then uses this information to adjust SRS frequency domain parameters. Feedback loops enable the system to learn from previous transmissions and optimize parameters accordingly, improving interference management while keeping processing complexity manageable through targeted adjustments based on actual performance data.
Solution Approach 2:
The patent implements preliminary action by pre-configuring a set of acceptable frequency domain parameters and using feedback to select from these pre-defined options rather than requiring completely new parameter calculations. This reduces processing complexity by limiting the search space for optimal parameters while still achieving improved interference management through systematic parameter selection.
3Productivity
If frequency domain parameters are reconfigured dynamically, then resource utilization optimizes, but signaling messages and processing time increase
Solution Approach 1:
The patent applies periodic action by implementing scheduled parameter reconfigurations rather than continuous changes. The system adjusts frequency domain parameters at specific intervals or triggered by periodic channel quality reports, allowing resource utilization optimization while limiting reconfiguration time to manageable periods. This periodic approach balances the benefits of dynamic adaptation with the costs of frequent signaling and processing.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network node may receive, from a second network node, a sounding reference signal (SRS) configuration associated with an SRS resource set including one or more SRS resources, the SRS configuration indicating information for a set of one or more frequency domain parameters associated with the SRS resource set. The first network node may receive, from the second network node, a message indicating modified information for a dynamic reconfiguration of one or more frequency domain parameters, from the set of one or more frequency domain parameters, associated with at least one SRS resource. The first network node may transmit, to the second network node, an SRS, using the at least one SRS resource, in accordance with the modified information for the one or more frequency domain parameters. Numerous other aspects are described.