Delay Status Reporting for Wireless Latency Management
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Solution Overview
Problem
Wireless communication systems face challenges in effectively managing delay status reporting, particularly in ensuring timely delivery of data packets with latency requirements, as network nodes lack sufficient information about data delays within user equipment buffers.
Innovation Solution
User equipment (UE) transmits delay status reports indicating the remaining time associated with protocol data units (PDUs) or PDU sets, which include residual times of packet data convergence protocol (PDCP) discard timers or differences between delay budgets and buffer retention times, enabling network nodes to schedule resources and improve service latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If network nodes do not receive delay status reports from user equipment, then device complexity and signaling overhead are reduced, but the ability to schedule resources timely and ensure latency requirements are not met deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the user equipment periodically reports delay status information to the network node. This feedback loop enables the network node to awareness of packet delay conditions and adjust scheduling decisions accordingly, resolving the contradiction by providing necessary information without requiring complex continuous monitoring mechanisms.
Solution Approach 2:
The user equipment performs preliminary actions by starting the PDCP discard timer when data is received and reporting the remaining time before actual discard occurs. This advance notification allows the network node to prepare for potential latency issues and schedule resources proactively, maintaining reliability without real-time complex interactions.
2Measurement precision
If user equipment continuously monitors and reports delay status, then resource scheduling accuracy is improved, but energy consumption and processing overhead increase
Solution Approach 1:
Instead of continuous monitoring, the patent employs periodic status reporting where the user equipment transmits delay status information at specific intervals or when threshold conditions are met. This periodic approach maintains adequate measurement precision for effective resource scheduling while significantly reducing energy consumption compared to continuous operation.
Solution Approach 2:
The user equipment autonomously manages its own delay status monitoring and reporting without requiring constant network node intervention. The device self-evaluates its buffer status and initiates reports only when necessary, reducing processing overhead and energy consumption while maintaining sufficient measurement accuracy for the network to make informed scheduling decisions.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a delay status report indicating a remaining time, the remaining time comprising a residual time of a packet data convergence protocol (PDCP) discard timer associated with at least one of a protocol data unit (PDU) or a PDU set that includes the PDU. In some aspects, the remaining time may include a difference between a delay budget and an amount of time that at least one of a PDU or a PDU set that includes the PDU has been maintained in a data buffer of the UE, the delay budget comprising a value associated with at least one of a PDB or a PSDB. The UE may perform a wireless communication operation in association with the delay status report. Numerous other aspects are described.