Physical-Layer Feedback for PDU Set Transmission Termination
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Solution Overview
Problem
Existing wireless communication protocols face challenges in efficiently transmitting Packet Data Units (PDUs) with high reliability and low latency, particularly in 5G networks, leading to resource wastage and increased latency due to delayed feedback in higher layers.
Innovation Solution
Implementing early feedback mechanisms at the physical layer to terminate the transmission of PDU sets upon detecting unsuccessful data segments, ensuring that only successful PDUs are transmitted, thereby conserving resources and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If early feedback mechanisms are implemented at the physical layer to terminate PDU set transmission upon detecting unsuccessful data segments, then communication reliability and resource efficiency are improved, but device complexity and protocol implementation complexity increase
Solution Approach 1:
The patent implements preliminary action by establishing feedback mechanisms at the physical layer that can detect transmission failures and trigger termination of PDU set transmission before all segments are sent. This early detection and termination capability prevents wasted transmission resources and improves reliability by ensuring complete PDU sets are delivered or transmission is stopped, rather than continuing to send segments that will ultimately be discarded.
Solution Approach 2:
The patent employs feedback mechanisms where the physical layer monitors transmission success of data segments and provides feedback signals to control whether subsequent PDUs in a set should be transmitted. This feedback loop enables the system to adapt transmission behavior based on real-time channel conditions and segment delivery status, improving overall communication reliability while managing complexity through structured feedback protocols.
2Loss of time
If transmission of PDU sets is terminated upon detecting unsuccessful data segments, then resource wastage is reduced and latency is lowered, but measurement precision and detection capability requirements increase
Solution Approach 1:
The system performs preliminary detection of data segment transmission success at the physical layer before committing to transmit entire PDU sets. By detecting failures early in the transmission process, the system can terminate subsequent transmissions, avoiding the latency that would result from sending complete PDU sets that will ultimately be discarded due to segment failures.
Solution Approach 2:
The patent implements a mechanism to skip or rush through the transmission process by terminating PDU set transmission as soon as a segment failure is detected, rather than completing the full transmission sequence. This skipping approach dramatically reduces transmission latency for failed PDU sets, as the system does not wait to send segments that will not be successfully received and processed.
Data Source
AI summary
A method for operating a communications device in a wireless network involves managing application layer data as Packet Data Units (PDUs). The method includes transmitting PDUs via a physical layer while restricting transmission to the specific PDUs of a set. If a data segment fails to transmit successfully, the method terminates transmission of the remaining PDUs in the set, conserving resources and improving efficiency. Alternatively, the method provides feedback from the physical layer to higher layers, such as the PDCP layer, to terminate PDU transmission upon detecting a failure. This approach enhances reliability, reduces latency, and optimizes energy usage by preventing unnecessary retransmissions of failed PDUs or their sets. The method emphasizes resource efficiency and high-performance communication by leveraging cross-layer feedback and adaptive control.