FLUTE Content Supply Device SDP Reception Mode
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Solution Overview
Problem
In FLUTE multicast delivery, the reception side cannot determine the content of packets being transmitted without analyzing the FDT, leading to potential missing packets during live streaming where retransmission frequency is low, causing unstable playback.
Innovation Solution
A content supply device generates an SDP that includes the reception mode, allowing the terminal device to receive all packets by indicating the necessary reception mode before starting the FLUTE session, such as 'Promiscuous' mode for receiving all packets, which helps in live streaming scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the reception side analyzes the FDT to determine packet content in FLUTE multicast delivery, then the reception side can selectively receive needed packets, but packets may be omitted during live streaming where retransmission frequency is low
Solution Approach 1:
The invention applies preliminary action by having the reception side acquire the SDP before the FLUTE session starts, which contains pre-defined reception mode information. This allows the terminal to pre-configure its packet reception behavior based on the service type (e.g., live streaming vs. VOD), ensuring reliable packet capture for live content where retransmission is not available, while maintaining efficient selective reception for other content types.
2Reliability
If the reception side receives all packets in FLUTE session without analyzing FDT, then packet omission is reduced, but reception efficiency decreases and unnecessary data is processed
Solution Approach 1:
The invention implements dynamics by making the packet reception behavior adaptable rather than static. The terminal device dynamically adjusts its reception mode based on the service type information provided in the SDP. For live streaming services, it adopts promiscuous mode to receive all packets reliably, while for VOD or other services, it can use selective reception based on FDT analysis, thus optimizing the balance between reliability and efficiency for different scenarios.
3Reliability
If FLUTE multicast delivery is used for live streaming, then stable reception is expected due to QoS guarantee, but packet omission occurs when retransmission frequency is low
Solution Approach 1:
The invention applies local quality by tailoring the packet reception strategy to the specific characteristics of different service types. The SDP contains service type information that allows the terminal to apply different reception qualities: for live streaming where every packet is critical and irreplaceable, the terminal uses promiscuous mode to capture all packets with maximum reliability, while for other services where some packet loss may be tolerable or recoverable, more efficient selective reception methods can be used.
Data Source
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AI summary
The present disclosure relates to a content supply device, a content supply method, a program, a terminal device, and a content supply system in which the reception side that acquires a FLUTE session can be notified of the reception mode. A content supply device according to the present disclosure includes: a fragment stream generating portion that generates a fragment stream on the basis of source data of content; a FLUTE-stream generating portion that generates a FLUTE stream from the generated fragment stream; an SDP creation portion that creates an SDP including a reception mode in the case of a reception side receiving a FLUTE session including the FLUTE stream; and a multicast delivery portion that delivers the FLUTE stream over FLUTE multicast and, prior to delivery of the FLUTE stream over FLUTE multicast, delivers the SDP over FLUTE multicast. The present disclosure can be applied to a system that delivers content over FLUTE multicast.