Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Joint Caching and Resource Allocation in D2D-Assisted Wireless HetNet   5G networks are required to provide very fast and reliable communications
while dealing with the increase of users traffic. In Heterogeneous Networks
(HetNets) assisted with Device-to-Device (D2D) communication, traffic can be
offloaded to Small Base Stations or to users to improve the network's
successful data delivery rate. In this paper, we aim at maximizing the average
number of files that are successfully delivered to users, by jointly optimizing
caching placement and channel allocation in cache-enabled D2D-assisted HetNets.
At first, an analytical upper-bound on the average content delivery delay is
derived. Then, the joint optimization problem is formulated. The non-convexity
of the problem is alleviated, and the optimal solution is determined. Due to
the high time complexity of the obtained solution, a low-complex sub-optimal
approach is proposed. Numerical results illustrate the efficacy of the proposed
solutions and compare them to conventional approaches. Finally, by
investigating the impact of key parameters, e.g. power, caching capacity, QoS
requirements, etc., guidelines to design these networks are obtained.

30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci