POLL Bit Trigger Threshold Logic for 5G NR Memory Management
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Solution Overview
Problem
In 5G NR wireless communication systems, the existing POLL bit trigger mechanism requires significant memory resources due to large values of PDUs without POLL, leading to memory overflow issues when using 18-bit sequence numbers, especially when transmitting large IP packets.
Innovation Solution
A method is introduced to determine whether the count of PDUs without POLL and the total transmission queue memory exceed specific thresholds, generating a POLL bit to trigger status reporting and acknowledge received SDU segments, thereby optimizing memory usage and reducing the need for excessive memory storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the POLL bit trigger mechanism uses large values of PDUs without POLL to ensure reliable acknowledgment, then the reliability of data transmission is improved, but the memory resources required increase significantly causing memory overflow
Solution Approach 1:
The patent changes the triggering parameter from a fixed threshold-based mechanism to a dynamic counter-based mechanism. The counter increments with each PDU transmitted and triggers a POLL bit when reaching a predefined maximum value, allowing adaptive control of acknowledgment frequency without requiring large memory resources to track individual PDU states
Solution Approach 2:
The patent segments the continuous transmission queue into discrete PDU units with individual sequence numbers. By tracking and triggering POLL bits at specific intervals (maximum PDU without POLL), the system divides the memory management task into manageable segments rather than requiring centralized tracking of all pending PDUs
2Measurement precision
If the system transmits large IP packets with detailed status reporting, then the measurement precision of transmission status is improved, but the transmission complexity increases
Solution Approach 1:
The patent implements partial status reporting by only triggering POLL bits when the counter reaches the maximum threshold, rather than reporting status for every PDU. This partial action approach maintains sufficient transmission status information while significantly reducing the complexity of tracking and reporting mechanisms
Data Source
AI summary
Aspects described herein relate to POLL timer enhancement in fifth generation new radio (5G NR). In an example, the aspects may include determining whether a count of packet data unit (PDU) without POLL associated with a current PDU sequence satisfies a threshold for maximum PDUs without POLL; determining whether a total transmission queue memory exceeds an uplink transmission queue memory threshold; generating a POLL bit based on a determination that the PDU without POLL count associated with the current PDU without POLL in-sequence satisfies the threshold for maximum PDUs without POLL and the total transmission queue memory exceeds the threshold for uplink transmission queue memory; and transmitting, to a network entity, the current PDU with the POLL bit.