Prioritized Signaling via Functional Application Programming Interface
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Solution Overview
Problem
Existing wireless communication systems face delays in transmitting prioritized messages due to constraints in the conventional Physical (PHY) Application Programming Interface (API), which limits the number of uplink control information (UCI) indications per slot, affecting the timely delivery of high-priority information such as scheduling requests and hybrid automatic repeat request (HARQ) acknowledgments.
Innovation Solution
The proposed solution involves decoupling high-priority and low-priority uplink payloads at the Physical (PHY) layer and delivering them to the Medium Access Control (MAC) layer in separate segments via a Functional Application Programming Interface (FAPI), allowing for prioritization and segmentation of UCI payloads, thereby overcoming delays in transmitting prioritized messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the conventional PHY API is used to transmit uplink control information, then the system maintains simplicity in the interface design, but the transmission delay of high-priority messages increases due to limited UCI indications per slot
Solution Approach 1:
The patent segments uplink control information into high-priority and low-priority categories, transmitting them through different interfaces. High-priority UCI is transmitted through the new FAPI while low-priority UCI continues through the conventional PHY API, allowing time-critical information to be delivered faster without overwhelming the entire system architecture
Solution Approach 2:
The patent introduces FAPI as an intermediary interface between the PHY layer and MAC layer. This new interface acts as a mediator that handles time-critical uplink control information separately from the conventional PHY API, thereby reducing transmission delays for high-priority messages without disrupting the existing system interface structure
2Productivity
If all uplink control information is transmitted through a single interface, then the interface design remains simple, but traffic congestion occurs in the MAC layer affecting processing efficiency
Solution Approach 1:
The patent divides uplink control information transmission into two separate paths: high-priority UCI through FAPI and low-priority UCI through the conventional PHY API. This segmentation prevents traffic congestion in the MAC layer by distributing load across different interfaces, thereby improving overall processing efficiency
Solution Approach 2:
The patent applies different transmission characteristics to different types of uplink control information based on their priority levels. High-priority information receives preferential treatment through the FAPI with fewer processing constraints, while low-priority information follows the conventional PHY API path, optimizing the system for time-critical transmissions without unnecessarily complicating the handling of non-urgent data
Data Source
AI summary
Certain aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for prioritized signaling via a functional application programming interface (FAPI). A method for conveying uplink (UL) payload may include receiving, at a physical (PHY) layer, a UL payload from one or more user equipments (UEs) and delivering different segments associated with the UL payload, to a medium access control (MAC) layer, in different messages via a functional application platform interface (FAPI). According to certain aspects, the different segments may carry UL payload with different priorities, and segments with higher priority UL payload may be delivered, to the MAC layer, prior to segments with lower priority UL payload.