Linear Network Code for Erasure Broadcast Channel with Feedback: Complexity and Algorithms

Provided by: The China Press Berhad
Topic: Networking
Format: PDF
In this paper, the authors investigate the construction of linear network codes for broadcasting a set of data packets to a number of users. The links from the source to the users are modeled as independent erasure channels. Users are allowed to inform the source node whether a packet is received correctly via feedback channels. In order to minimize the number of packet transmissions until all users have received all packets successfully, it is necessary that a data packet, if successfully received by a user, can increase the dimension of the vector space spanned by the encoding vectors he or she has received by one. Such an encoding vector is called innovative.

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