Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimal Link Scheduling in Millimeter Wave Multi-hop Networks with
  MU-MIMO radios   This paper studies the maximum throughput achievable with optimal scheduling
in multi-hop mmWave picocellular networks with Multi-user Multiple-Input
Multiple-Output (MU-MIMO) radios. MU-MIMO enables simultaneous transmission to
multiple receivers (Space Division Multiplexing) and simultaneous reception
from multiple transmitters (Space Division Multiple Access). The main
contribution is the extension to MU-MIMO of the Network Utility Maximization
(NUM) scheduling framework for multi-hop networks. We generalize to MU-MIMO the
classic proof that Maximum Back Pressure (MBP) scheduling is NUM optimal. MBP
requires the solution of an optimization that becomes harder with MU-MIMO
radios. In prior models with one-to-one transmission and reception, each valid
schedule was a matching over a graph. However, with MU-MIMO each valid schedule
is, instead, a Directed Bipartite SubGraph (DBSG). In the general case this
prevents finding efficient algorithms to solve the scheduler. We make MU-MIMO
MBP scheduling tractable by assuming fixed power allocation, so the optimal
scheduler is the Maximum Weighted DBSG. The MWDBSG problem can be solved using
standard Mixed Integer Linear Programing. We simulate multi-hop mmWave
picocellular networks and show that a MU-MIMO MBP scheduler enables a 160%
increase in network throughput versus the classic one-to-one MBP scheduler,
while fair rate allocation mechanisms are used in both cases.

35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat