File-Based Downlink Transmission for XR Reliability
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Solution Overview
Problem
Current 5G wireless communication systems face challenges in file-based transmission and retransmission, particularly in ensuring reliable delivery of XR applications that require high bit rates, low latency, and specific file-level error rates, as they are only aware of packet-level requirements and not file-level requirements.
Innovation Solution
The proposed solution involves transmitting files with a file identifier in each packet, requesting reception status after the last packet is sent, and transmitting repair bits upon negative acknowledgment, ensuring file-level retransmission until acknowledgment is received, and configuring FEC algorithms for efficient repair bit transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If packet-level transmission is used in 5G systems, then data transfer speed is improved, but file-level reliability is worsened
Solution Approach 1:
The patent segments the transmission process into packet-level operations for speed and file-level operations for reliability. Files are divided into packets for high-speed transmission, then reassembled at the file level with repair bits to ensure complete file delivery, resolving the contradiction between speed and reliability.
Solution Approach 2:
The patent introduces repair bits as an intermediary mechanism between packet transmission and file delivery. These repair bits act as a mediator that enables file-level retransmission without requiring complete packet retransmission, thus maintaining speed while improving file-level reliability.
2Reliability
If file-level retransmission is implemented, then file delivery reliability is improved, but system complexity is worsened
Solution Approach 1:
The patent segments retransmission operations into file-level units rather than packet-level, reducing the number of retransmission events. This segmentation simplifies the retransmission logic while maintaining file delivery reliability, counteracting the complexity increase.
Solution Approach 2:
The patent allows discarding of individual lost packets and recovers file integrity through repair bits. This approach simplifies the system by not requiring complex packet-by-packet retransmission protocols, instead using a simpler file-level recovery mechanism.
3Reliability
If repair bits are transmitted continuously, then file delivery reliability is improved, but power consumption is worsened
Solution Approach 1:
The patent implements periodic transmission of repair bits only when needed, rather than continuous transmission. Repair bits are sent in response to negative acknowledgments, creating a periodic action pattern that reduces power consumption while maintaining file delivery reliability.
Solution Approach 2:
The patent uses feedback mechanisms where the receiver sends negative acknowledgments only when files are not properly received. This feedback-driven approach ensures repair bits are transmitted only when necessary, reducing unnecessary power consumption while maintaining reliability.
4Speed
If packet-level error handling is used, then transmission speed is improved, but file-level error rate control is worsened
Solution Approach 1:
The patent segments error handling into packet-level fast processing and file-level precision control. Packets are processed quickly with simple error handling, while file-level error rate is precisely controlled through repair bits and retransmission, resolving the contradiction between speed and precision.
Solution Approach 2:
The patent introduces repair bits as an intermediary that bridges packet-level transmission and file-level error control. These repair bits enable precise file-level error rate control without slowing down the underlying packet-level transmission speed.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a network entity transmits, to a user equipment (UE), at least one file, the at least one file comprising a group of data packets, wherein each data packet of the group of data packets of the at least one file is associated with a file identifier of the at least one file, transmits, to the UE, after transmitting the last data packet of the group of data packets of the at least one file, a request for the UE to report a reception status of the at least one file, transmits, to the UE, one or more repair bits for the at least one file, receives an acknowledgment from the UE, and ceases transmission of the one or more repair bits upon reception of the acknowledgment from the UE.