Backlog Estimation for Uplink/Downlink Fairness in Unsaturated Bidirectional CSMA Networks

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Bidirectional transmission (BT)-based protocols have been proposed to achieve uplink/downlink fairness in IEEE 802.11 systems. To successfully guarantee the fairness in unsaturated carrier sensing multiple access (CSMA) systems, it is important to accurately estimate the number of backlogged nodes considering both of the uplink (UL) and downlink (DL) traffic. In this letter, we propose a backlog estimation mechanism for the bidirectional media access control to guarantee UL/DL fairness in an unsaturated CSMA environment. We derive the optimal transmit probability and the optimal DL transmit opportunity for BT as a function of the estimated backlog size. The proposed algorithm ensures the near-perfect UL/DL fairness while improving the overall system performance.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2017-12
Language
English
Article Type
Article
Keywords

IEEE-802.11 WIRELESS LANS; ALLOCATION; TERMINALS; DOWNLINK; NUMBER; UPLINK

Citation

IEEE COMMUNICATIONS LETTERS, v.21, no.12, pp.2702 - 2705

ISSN
1089-7798
DOI
10.1109/LCOMM.2017.2752744
URI
http://hdl.handle.net/10203/238820
Appears in Collection
EE-Journal Papers(저널논문)
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