Transport Layer Coding in Irregular Networks
Abstract
Purpose: Transport layer coding has been discussed so far with the assumption that the network is uniform, i.e. the network has no
subnetworks with different capacities. Coding rate of transport layer coding in such networks is fixed and equal for all the subnetworks.
The aim of this work is increasing the efficiency of transport layer coding in nonuniform networks by adapting the code rate. Results:
A new transport layer coding method was proposed in which the code rate is selected for every subnetwork according to such parameters as the number of the routes, the lengths of the routes and the load of the subnetworks. On the intermediate nodes of the network, all messages are recoded with the chosen code rate. The gain of the proposed method as compared to coding without adaptation strongly depends on subnetwork parameters. Analysis and simulation of Kleinrock networks consisting of two subnetworks demonstrated a gain not less than 10%. Practical relevance: The proposed method of transport layer coding with coding rate adaptation can decrease the average delay of a message.
