Confirmatory Signaling for Multi-PUSCH Scheduling Reliability
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Solution Overview
Problem
In wireless communication systems, especially those operating at high frequencies like NR RAN, there is a challenge with missed downlink control information (DCI) that schedules multiple shared channels (M-DCI), leading to wasted resources and system degradation due to unclear resource usage.
Innovation Solution
The implementation of a confirmatory signaling mechanism, where the user equipment (UE) acknowledges receipt of the M-DCI and the base station sends confirmatory signaling to ensure joint understanding of resource usage, thereby minimizing resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If confirmatory signaling is implemented for multi-PUSCH and multi-PDSCH scheduling, then resource wastage is reduced and reliability is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent implements a feedback mechanism where the UE sends confirmatory signaling back to the base station after receiving M-DCI. This feedback loop ensures that the base station confirms receipt and understanding of the scheduling information, thereby improving reliability of resource allocation while managing complexity through structured interaction protocols
Solution Approach 2:
The confirmatory signaling is sent in advance before the actual data transmission begins. This preliminary confirmation ensures that both sides are aligned on resource usage parameters before the main transmission starts, preventing resource wastage and ensuring proper resource allocation from the outset
2Productivity
If multi-PUSCH and multi-PDSCH scheduling is used, then productivity is improved through efficient resource allocation, but loss of information occurs due to missed DCI
Solution Approach 1:
The patent introduces confirmatory signaling as a cushioning mechanism that provides redundancy in case the initial M-DCI is missed or corrupted. This beforehand confirmation ensures that even if the primary scheduling information is lost, the system can fall back to the confirmed signaling, preventing complete information loss and maintaining productivity
Solution Approach 2:
The feedback mechanism allows the base station to verify successful reception of M-DCI before initiating multi-PUSCH/PDSCH transmission. This feedback loop acts as an information verification layer that prevents data transmission based on potentially lost or incorrect scheduling information, thereby reducing information loss while maintaining efficient resource allocation
Data Source
AI summary
Systems and methods disclosed herein relate to confirmatory signaling sent by a base station for the use of multiple physical uplink control channels (multi-PUSCH) or multiple physical downlink control channels (multi-PDSCH) scheduled in downlink control information (DCI) sent by the base station. Confirmatory signaling may be provided in the form of DCI, or in the form of a physical confirmation indicator channel (PCICH). Confirmatory signaling in DCI may confirm multi-PUSCH/multi-PDSCH scheduling according to one or more UE, and according to one or more CC used by each of the one or more UE using a bitmap. Confirmatory signaling in PCICH may confirm the multi-PUSCH/multi-PDSCH scheduling according to one or more UE. In these embodiments, a symbol for each such UE is spread according to different orthogonal covering codes (OCC), and such spreaded symbols are sent to the UE in a resource element set (RES) of a physical radio block (PRB).