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Caching in Heterogeneous Networks with Per-File Rate Constraints. (arXiv:1810.06475v1 [cs.IT])
来源于:arXiv
We study the problem of caching optimization in heterogeneous networks with
mutual interference and per-file rate constraints from an energy efficiency
perspective. A setup is considered in which two cache-enabled transmitter nodes
and a coordinator node serve two users.
We analyse and compare two approaches: (i) a cooperative approach where each
of the transmitters might serve either of the users and (ii) a non-cooperative
approach in which each transmitter serves only the respective user. We
formulate the cache allocation optimization problem so that the overall system
power consumption is minimized while the use of the link from the master node
to the end users is spared whenever possible. We also propose a low-complexity
optimization algorithm and show that it outperforms the considered benchmark
strategies.
Our results indicate that significant gains both in terms of power saving and
sparing of master node's resources can be obtained when full cooperation
between the transmitters 查看全文>>