Conditional Data Transmission in WTRU MAC/RLC/PDCP Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing data transmission for immersive services and extended reality applications, particularly in determining the availability of data for transmission based on dependencies and transmission conditions.
Innovation Solution
A wireless transmit/receive unit (WTRU) determines the availability of data for transmission by considering dependencies between data packets, processing status, and various conditions such as time-based and event-based criteria, allowing for conditional transmission of data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data transmission is performed without checking dependencies and transmission conditions, then transmission speed is improved, but transmission reliability deteriorates
Solution Approach 1:
The system performs preliminary checks of dependency conditions and transmission criteria before data transmission occurs. The WTRU evaluates whether dependent data has been successfully transmitted or is available before attempting to transmit current data, preventing premature or failed transmissions that would compromise reliability without significantly impacting transmission speed.
2Productivity
If all data is transmitted immediately upon arrival, then productivity is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts data transmission behavior based on real-time conditions including dependency status, transmission criteria satisfaction, and network state. The WTRU flexibly determines when data is ready for transmission by continuously monitoring dependency conditions and transmission criteria, optimizing both productivity and resource efficiency through adaptive decision-making rather than static immediate transmission.
3Reliability
If transmission conditions are strictly enforced, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The WTRU integrates multiple functions including dependency evaluation, transmission criteria checking, data buffering, and scheduling decisions into a unified data handling mechanism. This multi-functional approach manages transmission reliability through consolidated logic rather than separate complex subsystems, reducing overall device complexity while maintaining strict condition enforcement.
4Reliability
If data is buffered until all dependencies are satisfied, then transmission reliability is improved, but loss of time increases
Solution Approach 1:
The system transmits data when sufficient conditions are met rather than waiting for all possible dependencies to be fully satisfied. The WTRU evaluates transmission criteria and deploys data when enough conditions are fulfilled to ensure reliable transmission, avoiding excessive buffering delays while maintaining adequate reliability through partial condition satisfaction.
Data Source
AI summary
A device may determine conditional availability of data for transmission. A device (e.g., in medium access control (MAC), radio link control (RLC), and/or packet data convergence protocol (PDCP) may determine a second amount of data is available for conditional transmission (e.g., for a scheduling request (SR), buffer status report (BSR), and/or multiplexing in a transport block (TB)) as a function of, e.g., the transmission status of a first amount of data multiplexed in a TB, available for transmission, discarded, and/or transmitted. In examples, a device may receive an indication of first data, receive an indication of second data, determine that a dependency exists between the first and second data, determine the second data is unavailable for transmission, determine condition(s), determine an amount of the second data is available for transmission based on satisfaction of the condition(s), and perform transmission processing or transmission of the amount of the second data.