Journal of Systems Engineering and Electronics ›› 2019, Vol. 30 ›› Issue (6): 1202-1211.doi: 10.21629/JSEE.2019.06.14
• Systems Engineering • Previous Articles Next Articles
Received:
2018-08-13
Online:
2019-12-20
Published:
2019-12-25
Contact:
Xin ZHOU
E-mail:zhouxin@iscas.ac.cn;changwen@iscas.ac.cn
About author:
ZHOU Xin was born in 1986. He received his B.S. degree in electronic engineering from Huazhong University of Science and Technology, China, in 2007, M.S. degree in communication and information system from Huazhong University of Science and Technology in 2009, and Ph.D. degree in computer sciences from the University of Chinese Academy of Sciences in 2017. He has worked in the Institute of Software, Chinese Academy of Sciences since 2009, and has been an associate research fellow since 2017. He participated in the design and development of the first VHF/UHF military cognitive radio of China, and won one second class prize of Military Science and Technology Progress Award. His current research interests include ad hoc networks, cognitive radio networks and sepctrum recognition. E-mail: Supported by:
Xin ZHOU, Changwen ZHENG. Priority access for QoS support in distributed wireless networks[J]. Journal of Systems Engineering and Electronics, 2019, 30(6): 1202-1211.
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Table 2
Common parameters"
Parameter | Value |
Bandwidth/modulation | 20 MHz/OFDM |
Bit-rate/Mbps | 54 |
Slot/${\rm{\mu }}$s | 9 |
SIFS/${\rm{\mu }}$s | 16 |
AIFS | SIFS+AIFSN $\cdot$ slot |
PHY overhead/${\rm{\mu }}$s | 20 (Preamble+PHY header) |
MAC overhead/Octets | 40 (MAC header+FCS) |
Data payload size/Octets | $ \le 2~048$ |
ACK payload size/Octets | 14 |
Retransmit limit | 7 |
Table 3
Individual parameters"
Parameter | AC_VO | AC_VI | AC_BE | |
EDCA | AIFSN | 2 | 3 | 6 |
$CW_{\min}$ | 4 | 8 | 16 | |
$CW_{\max}$ | 8 | 16 | 1 024 | |
PIS | AIFSN | 2 | 2 | 2 |
$CW_{\min}$ | 32 | 32 | 32 | |
$CW_{\max}$ | 256 | 1 024 | 1 024 | |
$n^{a}$ | 2.3 | 3.1 | 3.9 | |
DPCA | AIFSN | 2 | 3 | 4 |
$CW_{\min}$ | 32 | 32 | 32 | |
$CW_{\max}$ | 256 | 1 024 | 1 024 | |
PABT | AIFSN | 2 | 3 | 4 |
$CW_{\min}$ | 32 | 32 | 32 | |
$CW_{\max}$ | 256 | 1 024 | 1 024 | |
$L_{\rm low}$ | 3 | 5 | 6 | |
$L_{\rm high}$ | 4 | 6 | 7 | |
$a, b$ | 6 | 10 | 12 |
Table 4
Traffic related parameters"
Parameter | AC_VO | AC_VI | AC_BE |
Encoder | G.729a | H.264 | none |
Frame length/octets | 80 | 1 350 | 1 500 |
Inter-arrival time/ms | 40 | 10 | 1 |
Buffer size/packets | 64 | 64 | 64 |
MAC data rate/Mbps | 0.024 | 1.112 | 12.32 |
QoS for delay/ms | $ < $100 | $ < $200 | none |
QoS for PLR/% | $ < $1 | $ < $1 | none |
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