SRS Carrier Switching Impact Control Across LTE-NR Serving Cells
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Solution Overview
Problem
Existing methods fail to effectively determine and mitigate the interruption caused by SRS switching due to different numerologies and mixed LTE-NR deployments, leading to performance degradation in cellular communications systems.
Innovation Solution
A method and system for controlling SRS carrier-based switching by determining the impact on serving cells, considering factors such as frequency separation, numerology, and radio access technology, allowing compensation and adaptation to reduce the switching impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SRS carrier-based switching is implemented to enable TDD carrier switching, then channel reciprocity benefits can be harvested in DL, but interruption occurs on one or more cells serving the UE
Solution Approach 1:
The patent applies preliminary action by having the UE determine the amount of impact before actual switching occurs. The UE calculates interruption duration and packet loss probability in advance based on current radio conditions, allowing the network to prepare compensation measures beforehand and schedule switching during optimal times to minimize service disruption.
Solution Approach 2:
The patent implements feedback by establishing a closed-loop system where the UE continuously monitors radio conditions, determines impact parameters, and provides this information back to the network. The network then adjusts switching timing and compensation strategies based on this feedback, creating an adaptive system that minimizes interruption while maintaining carrier switching capability.
2Speed
If fast carrier switching is allowed to enable SRS transmission on TDD carriers, then reciprocity benefits can be harvested, but interruption duration increases affecting packet loss
Solution Approach 1:
The patent applies dynamics by making the switching timing adaptive rather than fixed. The UE dynamically determines optimal switching moments based on real-time radio conditions, traffic patterns, and current impact assessments. This allows the system to switch carriers as fast as possible while dynamically adjusting to minimize interruption duration and packet loss based on actual network state.
3Device complexity
If SRS switching impact is not determined and compensated, then system complexity is reduced, but performance degradation occurs due to interruptions and packet losses
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously determine impact parameters and initiate compensation procedures without requiring constant network control. The UE independently monitors radio conditions, calculates interruption metrics, and executes compensation strategies, reducing the complexity of centralized control while maintaining high system performance through distributed intelligence.
Data Source
AI summary
Systems and methods for controlling Sounding Reference Signal (SRS) carrier-based switching impact are disclosed. In some embodiments, a method performed by a wireless device for controlling SRS switching impact comprises determining that there is a SRS carrier-based switching from a first carrier on which a first serving cell of the wireless device operates to a second carrier on which a second serving cell of the wireless device operates. The method further comprises determining an amount of impact that the SRS carrier-based switching has on one or more serving cells of the wireless device and utilizing the amount of impact that the SRS carrier-based switching has on the one or more serving cells of the wireless device. Corresponding embodiments of a wireless device are also disclosed. Embodiments of a method performed by a base station and corresponding embodiments of a base station are also disclosed.