Accession Number:

ADA439517

Title:

Detection and Prevention of MAC Layer Misbehavior for ad hoc Networks

Descriptive Note:

Technical research rept.

Corporate Author:

MARYLAND UNIV COLLEGE PARK DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Report Date:

2004-01-01

Pagination or Media Count:

18.0

Abstract:

It is known that 802.11 is not resilient to selfish behavior and denial of service DoS attacks targeting the MAC layer. In this study we assess the performance of the CSMACA scheme and investigate its efficiency with regard to security and information assurance in mobile ad hoc wireless networks. We investigate several variants of selfish node behaviors that abuse the random choice of Contention Window in the 802.11 DCF MAC protocol. We show that selfish behavior in the MAC layer can have devastating side effects on the performance of wireless networks similar to the effect of DoS attacks. Our main contributions are the prevention and detection of backoff manipulation in an ad hoc network. First we propose an algorithm to prevent backoff manipulation in a communication link between a sender and a receiver when at least one of the nodes behaves honestly. Secondly, we introduce algorithms for detection of backoff manipulation by a pair of colluding nodes.

Subject Categories:

  • Computer Systems Management and Standards
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE