PDCP Timer Mechanism for Packet Discard Reporting in 5G IoT
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, there is a challenge in efficiently managing packet discard and retransmission processes, leading to increased latency and communication disruptions due to changes in sequence number sizes and packet loss during transmission.
Innovation Solution
A method is introduced where a timer is set for packet data convergence protocol (PDCP) packets, allowing for the discard and reporting of packets that expire, enabling the transmitter to report discarded packets to the receiver, and the receiver to process other packets based on this information, thus reducing latency and ensuring effective communication despite changes in sequence number sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a timer is set for PDCP packets to enable discard and reporting, then packet loss is reduced and latency is minimized, but device complexity increases due to additional timer management and reporting mechanisms
Solution Approach 1:
The patent applies preliminary action by setting a timer when a PDCP packet is successfully transmitted. This timer is configured in advance to expire after a predetermined time period, enabling the system to proactively identify and report discarded packets before they cause significant data loss. The timer management mechanism is established beforehand, allowing for systematic tracking of packet transmission status without requiring complex real-time analysis.
2Productivity
If sequence number size is changed to improve communication efficiency, then data transfer rate increases, but packet identification accuracy deteriorates due to potential conflicts and errors
Solution Approach 1:
The patent implements feedback by having the receiver send back status information about received packets, including their sequence numbers. This feedback mechanism allows the transmitter to verify which packets were successfully received and which were discarded, enabling accurate packet identification even when sequence number sizes are optimized for efficiency. The feedback loop provides a reference that maintains identification accuracy while allowing for streamlined sequence number management.
Data Source
AI summary
The present disclosure relates to a communication technique for convergence of IoT technology and a 5G communication system for supporting a higher data transfer rate beyond a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart or connected cars, health care, digital education, retail business, and services associated with security and safety) on the basis of 5G communication technology and IoT-related technology. The present disclosure relates to transmission and reception by a communication device in a wireless communication system, and may refer to a PDCP and RLC structure defined in the 3GPP.