Satellite Multicast Delivery Destination Designation Method
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Solution Overview
Problem
Conventional multicast data communications over satellite links face inefficiencies due to the transfer of unnecessary multicast packets, which can constrain bandwidth and impede communications, especially when satellite links have limited bandwidth.
Innovation Solution
A multicast delivery destination designation method that involves transmitting destination designation information from receiving stations to a transmitting station, generating a multicast delivery destination table associating requested multicast addresses with communication terminals, and referencing this table to selectively transmit multicast packets only to stations that need them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multicast data is transferred to all receiving stations connected to the transmitting station over satellite links, then the system is simple to operate and maintains compatibility with conventional multicast communication protocols, but unnecessary multicast data is transmitted to receiving stations that do not need it, constraining the satellite link bandwidth and impeding other communications
Solution Approach 1:
The receiving station performs preliminary actions by generating and transmitting delivery destination designation information to the transmitting station before multicast data transmission occurs. This allows the transmitting station to pre-establish a multicast delivery destination table that identifies which receiving stations actually need specific multicast data, thereby avoiding unnecessary transmissions and optimizing bandwidth utilization before the actual data flow begins
Solution Approach 2:
The system implements a feedback mechanism where receiving stations send delivery destination designation information back to the transmitting station. This feedback loop enables the transmitting station to adjust its multicast transmission behavior based on actual receiving station needs, creating a closed-loop control system that optimizes bandwidth usage while maintaining operational simplicity
2Device complexity
If multicast data is transferred to all receiving stations, then no additional control mechanisms are required and the system remains simple, but the satellite link bandwidth is constrained due to transmission of unnecessary data packets
Solution Approach 1:
The receiving station performs preliminary actions by generating and transmitting delivery destination designation information to the transmitting station before multicast data transmission occurs. This allows the transmitting station to pre-establish a multicast delivery destination table that identifies which receiving stations actually need specific multicast data, thereby avoiding unnecessary transmissions and optimizing bandwidth utilization before the actual data flow begins
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of delivery destination designation information and a multicast delivery destination table. This intermediary layer sits between the simple multicast transmission protocol and the actual data flow, enabling intelligent routing decisions without requiring complex modifications to the underlying communication protocols or equipment
3Adaptability or versatility
If the satellite link bandwidth is narrow and multicast packets are transferred to all receiving stations, then the conventional multicast communication protocol can be used without modification, but the bandwidth constraint impedes other communications on the satellite link
Solution Approach 1:
The receiving station performs preliminary actions by generating and transmitting delivery destination designation information to the transmitting station before multicast data transmission occurs. This allows the transmitting station to pre-establish a multicast delivery destination table that identifies which receiving stations actually need specific multicast data, thereby avoiding unnecessary transmissions and optimizing bandwidth utilization before the actual data flow begins
Solution Approach 2:
The system implements a feedback mechanism where receiving stations send delivery destination designation information back to the transmitting station. This feedback loop enables the transmitting station to adjust its multicast transmission behavior based on actual receiving station needs, creating a closed-loop control system that optimizes bandwidth usage while maintaining operational simplicity
Data Source
AI summary
Delivery destination designation information, pertaining to a multicast address to which per-multicast-address delivery is requested by a communication terminal connected to a receiving station, is transmitted from the receiving station to a transmitting station, the transmitting station generates a multicast delivery destination table, in which a multicast address to which the delivery is requested from the communication terminal is associated to the communication terminal, from the delivery destination designation information received from a plurality receiving stations, and the transmitting station refers to the multicast delivery destination table when performing multicast transmission via a satellite.