Delivery Verification Report Mechanism for PtM Feedback Implosion
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Solution Overview
Problem
Current systems for point-to-multipoint (PtM) connections face congestion and inefficiency due to feedback implosion and unscaled delivery verification (DV) reporting, where receivers send DV reports and repair requests simultaneously, overwhelming the system and lacking an efficient scheduling mechanism.
Innovation Solution
Implementing a method where receivers are signaled with a maximum verification wait time and repair wait time, allowing them to transmit delivery verification reports and repair requests within specific intervals, reducing concurrent transmissions and system overload, and combining multiple DV reports into a single transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If receivers transmit delivery verification reports immediately after point-to-multipoint transmission, then delivery verification is completed quickly, but system congestion and feedback implosion occur
Solution Approach 1:
The transmitter signals a maximum verification wait time to receivers before the transmission session ends. This preliminary action allows receivers to prepare their delivery verification reports in advance but transmit them at controlled intervals rather than immediately, preventing feedback implosion while ensuring timely verification completion.
Solution Approach 2:
Instead of immediate or continuous delivery verification reporting, the system implements periodic reporting where receivers transmit DV reports at scheduled intervals based on the signaled maximum verification wait time. This periodic action distributes the feedback load over time, reducing system congestion while maintaining verification effectiveness.
2Reliability
If separate point-to-point connections are established for each delivery verification report, then delivery verification can be processed individually, but system overhead and resource consumption increase
Solution Approach 1:
Multiple delivery verification reports from different receivers are merged and transmitted together through a single point-to-point connection. The transmitter aggregates DV reports and transmits them collectively, reducing the number of separate connection establishment and maintenance operations, thereby lowering system overhead while maintaining individual report processing capability.
3Reliability
If delivery verification reports are sent for every point-to-multipoint session, then complete delivery verification is achieved, but system load increases due to scaling issues
Solution Approach 1:
The system implements delivery verification for all receivers (complete action) but controls the timing and aggregation of reports to manage system load. By using the maximum verification wait time parameter and periodic reporting, the system achieves complete verification without overwhelming processing capacity, effectively managing the scaling issue through temporal distribution rather than reducing verification scope.
Data Source
AI summary
Methods, systems, transmitters, receivers, network elements and software applications in a system for acknowledging the reception of sets of data objects, wherein one or more transmitters transmit one or more sets of data objects within respective point-to-multipoint transmission sessions to a plurality of receivers, and wherein repair requests and/or delivery verification reports are transmitted by at least one of said receivers to network elements within point-to-point transmission sessions. Different back-off times are assigned for delivery verification reports and repair requests, at least two delivery verification reports of one receiver are jointly transmitted within one point-to-point transmission session, and a delivery verification report is transmitted after a completed repair session within the same point-to-point transmission session used by the repair session. Furthermore, a minimum set of parameters to be sent in delivery verification reports is shown.