PDU Status Reporting Range Determination for Wireless Data Transfer
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Solution Overview
Problem
In wireless communication systems, data transfer management is hindered by lost Protocol Data Units (PDUs) during transmission, leading to deadlocks and delays in retransmission due to incomplete status reports from receivers.
Innovation Solution
A method and system that manage data transfer by determining a status reporting range based on sequence numbers in poll requests, enabling efficient reporting of PDU receipt or loss, and facilitating retransmissions through Acknowledgement and Negative Acknowledgement mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the transmitter polls the receiver for status report on PDUs transmitted, then the transmitter can obtain status information on PDU receipt or loss, but the transmitter may not receive the status report due to PDUs being lost during transmission, resulting in a deadlock situation
Solution Approach 1:
The patent segments the status report mechanism by introducing a separate confirmation message from the receiver to the transmitter. This confirmation message independently carries status information about PDUs received, ensuring that even if data PDUs are lost, the status information can still be transmitted through this dedicated channel, resolving the deadlock situation.
Solution Approach 2:
The patent implements a feedback mechanism where the receiver sends confirmation messages to the transmitter about the status of received PDUs. This feedback loop allows the transmitter to obtain accurate status information even when some PDUs are lost during transmission, eliminating the deadlock and improving reliability.
2Loss of information
If the receiver transmits status report of PDUs received, then the transmitter can know about PDU receipt or loss, but a delay in sending the status report from the receiver to the transmitter may delay retransmission of the lost PDUs
Solution Approach 1:
The patent applies preliminary action by having the receiver prepare and send confirmation messages proactively about received PDUs. This allows the transmitter to receive status information before the transmitter would normally send retransmission requests, reducing the delay in retransmission of lost PDUs.
Solution Approach 2:
The patent ensures continuous operation by maintaining an ongoing exchange of confirmation messages between transmitter and receiver. This continuous feedback mechanism eliminates gaps in status information delivery, ensuring that retransmission can occur as soon as status information is available, thereby minimizing time loss.
3Loss of information
If the transmitter repeats polling the receiver with request for status report, then the transmitter can try to obtain status information, but this results in a deadlock situation where no progress can be made
Solution Approach 1:
The patent extracts the status information transmission function from the data PDU transmission function. By separating these functions, the receiver can send status information independently through confirmation messages, allowing the transmitter to obtain status information without repeating polls, thus eliminating deadlocks and improving productivity.
Solution Approach 2:
The patent introduces confirmation messages as an intermediary mechanism between the transmitter and receiver. These confirmation messages carry status information and act as a mediator that enables the transmitter to obtain status details without creating deadlock conditions, thereby maintaining data transfer efficiency.
Data Source
AI summary
A method and a system for managing data transfer are provided. The method includes receiving a poll request for a status report on Protocol Data Units (PDUs) transmitted sequentially during the data transfer, determining a status reporting range of the PDUs to be accounted in the status report based on a sequence number in the poll request, and providing the status report with status information on a receipt or a loss of the PDUs within the status reporting range during the data transfer.