Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Efficient Virtual Network Function Placement Strategies for Cloud Radio
  Access Networks   The new generation of 5G mobile services places stringent requirements for
cellular network operators in terms of latency and costs. The latest trend in
radio access networks (RANs) is to pool the baseband units (BBUs) of multiple
radio base stations and to install them in a centralized infrastructure, such
as a cloud, for statistical multiplexing gains. The technology is known as
Cloud Radio Access Network (CRAN). Since cloud computing is gaining significant
traction and virtualized data centers are becoming popular as a cost-effective
infrastructure in the telecommunication industry, CRAN is being heralded as a
candidate technology to meet the expectations of radio access networks for 5G.
In CRANs, low energy base stations (BSs) are deployed over a small geographical
location and are connected to a cloud via finite capacity backhaul links.
Baseband processing unit (BBU) functions are implemented on the virtual
machines (VMs) in the cloud over commodity hardware. Such functions, built-in
software, are termed as virtual functions (VFs). The optimized placement of VFs
is necessary to reduce the total delays and minimize the overall costs to
operate CRANs. Our study considers the problem of optimal VF placement over
distributed virtual resources spread across multiple clouds, creating a
centralized BBU cloud. We propose a combinatorial optimization model and the
use of two heuristic approaches, which are, branch-and-bound (BnB) and
simulated annealing (SA) for the proposed optimal placement. In addition, we
propose enhancements to the standard BnB heuristic and compare the results with
standard BnB and SA approaches. The proposed enhancements improve the quality
of the solution in terms of latency and cost as well as reduce the execution
complexity significantly.

13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol