Coded Caching With User Grouping Over Wireless Channels

被引：4
|
作者：
Tegin, Busra [1 ]
Duman, Tolga M. [1 ]
机构：
[1] Bilkent Univ, Dept Elect & Elect Engn, TR-06800 Ankara, Turkey
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2020年 / 9卷 / 06期
关键词：
Signal to noise ratio; Fading channels; Servers; Optimization; Complexity theory; Wireless communication; Iterative methods; Coded caching; wireless fading channels;
D O I：
10.1109/LWC.2020.2975661
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
We study coded caching over non-ergodic fading channels. As the multicast capacity of a broadcast channel is restricted by the user experiencing the worst channel conditions, we formulate an optimization problem to minimize the transmission time by grouping users based on their channel conditions, and transmit coded messages according to the worst channel conditions in the group, as opposed to the worst among all. We develop two algorithms to determine the user groups: a locally optimal iterative algorithm and a numerically more efficient solution through a shortest path problem, and we illustrate the effectiveness of developed solutions via numerical examples.
引用
收藏
页码：920 / 923
页数：4
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