Enhancing capacity of a direct communication link

A method for capacity enhancement of a communications system, the method comprising:

• repeatedly delivering a plurality of messages of a finite message library to a terminal node from a source node, the terminal node coupled to the source node via a direct communications link and a variable redundancy delivery network comprising a plurality of intermediate storage nodes including a first intermediate storage node and a second intermediate storage node having a greater reliability than the first intermediate storage node, wherein the first intermediate storage node comprises rotating disk storage media and the second intermediate storage node comprises electronic non-volatile storage media;
• storing a given message of the plurality of messages with a first redundancy in the first intermediate storage node when the given message has been delivered to the terminal node a first threshold number of times, wherein the first redundancy comprises storing the given message in a first location in the first intermediate storage node;
• storing the given message with a second redundancy in the second intermediate storage node when the given message has been delivered to the terminal node a second threshold number of times, wherein the second redundancy comprises storing the given message in a second location in the second intermediate storage node;
• erasing the given message from the first intermediate storage node upon storing the given message in the second intermediate storage node;
• determining that the given message is to be delivered to the terminal node;
• and
• in response to the determination, delivering the given message stored in the second intermediate storage node to the terminal node.