Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Online Estimation and Adaptation for Random Access with Successive
  Interference Cancellation   This paper proposes an adaptive transmission algorithm for slotted random
access systems supporting the successive interference cancellation (SIC) at the
access point (AP). When multiple users transmit packets simultaneously in a
slot, owing to the SIC technique, the AP is able to decode them through SIC
resolve procedures (SRPs), which may occupy multiple consequent slots. While
such an SRP could potentially improve the system throughput, how to fully
exploit this capability in practical systems is still questionable. In
particular, the number of active users contending for the channel varies over
time which complicates the algorithm design. By fully exploiting the potential
of SIC, the proposed algorithm is designed to maximize the system throughput
and minimize the access delay. For this purpose, an online estimation is
introduced to estimate the number of active users in real-time and controls
their transmissions accordingly. It is shown that the throughput of the
proposed algorithm can reach up to 0.693 packets/slot under practical
assumptions, which is the first result achieving the throughput limit proved by
Yu-Giannakis. It is further shown that the system throughput of 0.559
packets/slot (80.6$\%$ of the throughput limit) is still achievable when the
SIC capability is restricted by two.

16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph