The implementation of LIFS in a single channel MAC protocol

Author

Velempini, Mthulisi ; Dlodlo, Mqhele E.

Author_Institution

Dept. of Electr. Eng., Univ. of Cape Town, Cape Town, South Africa

fYear

2010

fDate

26-28 April 2010

Firstpage

68

Lastpage

73

Abstract

The combination of RTS/CTS and EIFS enhancements has not adequately addressed the hidden terminal problem (HTP) in the receiver neighbourhood. The EIFS scheme protects ACK packets, while DATA packets are not shielded as the EIFS expires before they are delivered. Our proposed scheme is designed to address the shortcomings of the EIFS in protecting data packets. We propose a scheme which implements a Long Inter-Frame Space (LIFS) which protects DATA packets and calms HTPs within the receiver´s carrier sensing range. The performance of the scheme was evaluated through NS 2 simulations. The simulation results show an improvement in network performance. The scheme reduces end to end delay in all the tagged flows.

Keywords

access protocols; computer network security; wireless LAN; ACK packet protection; DATA packets; EIFS enhancement; LIFS; NS2 simulations; RTS/CTS enhancement; hidden terminal problem; long inter-frame space; single channel MAC protocol; Access protocols; Africa; Cities and towns; Data communication; Decoding; Delay; Interference; Media Access Protocol; Protection; Transmitters; Carrier Sensing Range; Communication Range; Hidden Terminal Problem; Interference Range; Long Inter-Frame Space; Single Channel MAC;

fLanguage

English

Publisher

ieee

Conference_Titel

MELECON 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference

Conference_Location

Valletta

Print_ISBN

978-1-4244-5793-9

Type

conf

DOI

10.1109/MELCON.2010.5476338

Filename

5476338