Delay Status Reporting via MAC PDU Padding Bits
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently reporting delay status and performing PSI based discards for extended reality (XR) traffic, leading to potential degradation in network performance due to unawareness of these events by network nodes.
Innovation Solution
Implementing an apparatus and method that prioritize delay status reports (DSR) over buffer status reports (BSR) in remaining padding bits of MAC PDUs, and activating PSI based discards with explicit notifications to network nodes, allowing for better radio resource management (RRM) and congestion handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If delay status reports (DSR) are transmitted using remaining padding bits in MAC PDU, then reporting efficiency is improved, but reliability deteriorates due to potential loss of padding bits
Solution Approach 1:
The patent introduces a new intermediary element: a specific bit field within the padding bits of MAC PDU that serves as a dedicated carrier for DSR information. This intermediary structure allows DSR to be transmitted efficiently using existing padding resources while establishing a reliable extraction mechanism at the receiver side, resolving the contradiction between efficiency and reliability
Solution Approach 2:
The patent applies preliminary action by pre-configuring the structure and extraction rules for DSR information before actual transmission occurs. The receiver is pre-equipped with knowledge of how to identify and extract DSR from padding bits, ensuring reliable retrieval even though padding bits are typically used for other purposes
2Productivity
If PSI based discard is activated to handle congestion, then network performance is improved, but information loss occurs due to discarded packets
Solution Approach 1:
The patent implements feedback by having the UE report PSI-based discard status and statistics back to the network node. This feedback loop allows the network to monitor discard events, adjust congestion control parameters, and optimize resource allocation, improving overall network performance while maintaining awareness of information loss
Solution Approach 2:
The patent enables self-service by allowing the UE to autonomously perform PSI-based discard operations based on pre-configured thresholds and congestion indicators. The UE independently manages packet discarding without requiring real-time network intervention, improving responsiveness while the network retains oversight through periodic reporting
3Loss of time
If DSR is prioritized over BSR for transmission, then latency performance is improved, but device complexity increases due to prioritization logic
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the priority parameter of DSR versus BSR based on congestion conditions and service requirements. When congestion is detected or for delay-sensitive services, DSR priority is increased; otherwise, standard BSR prioritization applies. This parameter-based approach enables flexible latency optimization without hardcoding complex prioritization logic
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify remaining padding bits in a medium access control (MAC) protocol data unit (PDU). The UE may transmit, via the remaining padding bits in the MAC PDU, a delay status report (DSR), wherein the DSR is prioritized over a buffer status report (BSR) with respect to being transmitted via the remaining padding bits in the MAC PDU. Numerous other aspects are described.