A Deterministic Algorithm for Pliable Index Coding
A Deterministic Algorithm for Pliable Index Coding
复制标题
一种用于柔韧索引编码的确定性算法
DOI:
--
复制
发表时间:
2016
期刊:
影响因子:
--
通讯作者:
C. Fragouli
中科院分区:
文献类型:
--
作者:
Linqi Song;C. Fragouli
Pliable index coding considers a server with m messages, and n clients where each has as side information a subset of the messages. We seek to minimize the number of transmissions the server should make, so that each client receives (any) one message she does not already have. Previous work has shown that the server can achieve this using O(log^2(n)) transmissions and needs at least Omega(log(n)) transmissions in the worst case, but finding a code of optimal length is NP-hard. In this paper, we propose a deterministic algorithm that we prove achieves this upper bound, that is, in an order almost as the worst-case optimal code length. We also establish a connection between the pliable index coding problem and the minrank problem over a family of mixed matrices.