Prioritized Early CSI Reporting for Mission Critical Services
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Solution Overview
Problem
Current communication systems lack mechanisms to prioritize and enhance the robustness of early channel state information (CSI) reporting for mission-critical devices, particularly during initial access, which hampers fast and reliable network connection establishment.
Innovation Solution
Implementing prioritized early CSI reporting by enabling CSI requests in random access responses and configuring systems to always expect CSI reports from high-priority devices, allowing for early CSI feedback before the completion of a radio resource control connection or as part of the random access procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If early CSI reporting is enabled for high priority devices, then link adaptation speed and reliability are improved, but system complexity and signaling overhead increase
Solution Approach 1:
The patent applies local quality by differentiating CSI reporting behavior based on device priority level. High priority devices (e.g., mission critical services) are configured to send early CSI reports, while normal priority devices follow conventional reporting timing. This selective approach improves link adaptation reliability for critical services without universally increasing system complexity across all devices.
Solution Approach 2:
The patent implements preliminary action by having high priority devices transmit CSI feedback before the random access procedure is fully completed. The network sends a CSI request indication in the random access response, and the device responds with CSI feedback in an early timing, before RRC connection is fully established. This preliminary CSI reporting enables faster link adaptation for mission critical services.
2Reliability
If CSI reporting is prioritized for high priority devices, then downlink channel robustness is improved, but random access procedure time increases
Solution Approach 1:
The patent applies preliminary action by having the device send CSI feedback early in the random access procedure, before the procedure is fully completed. The network includes a CSI request indication in the random access response message, and the high priority device responds with CSI feedback in an early timing, thereby enabling faster link adaptation while maintaining the efficiency of the random access procedure.
Solution Approach 2:
The patent implements feedback by introducing a CSI request indication in the random access response that triggers the device to send CSI feedback. This feedback mechanism allows the network to obtain channel state information quickly for high priority devices, improving downlink channel robustness without significantly extending the overall random access procedure time.
3Reliability
If early CSI reporting is implemented, then network coverage is improved, but signaling overhead increases
Solution Approach 1:
The patent applies local quality by selectively enabling early CSI reporting only for high priority devices configured with mission critical services, rather than applying it universally to all devices. The network determines device priority based on service type and applies the early reporting mechanism only where needed, thereby improving network coverage for critical services while minimizing the increase in overall signaling overhead.
Solution Approach 2:
The patent implements preliminary action by having the network include a CSI request indication in the random access response message for high priority devices. This preliminary triggering mechanism ensures that CSI feedback is obtained early in the procedure, improving network coverage for mission critical services while keeping the signaling overhead manageable through targeted application.
Data Source
AI summary
Methods and devices for early CSI reporting by high priority devices, such as for mission critical services. Early reporting can be configured or otherwise indicated by a node for UEs having a particular status, access identity, and/or access category. Reported feedback can include a transmission rank indicator (RI), a precoder matrix indicator (PMI), and a channel quality indicator (CQI) for a codeword.