In this paper, we investigate the resiliency to jamming of data
protocols, such as IP, over WLAN.We show that, on existing WLAN, an
adversary can successfully jam data packets at a very low energy
cost. Such attacks allow a set of adversary nodes disseminated over an
area to prevent communication, partition an ad hoc network or force
packets to be routed over adversary chosen paths. The ratio of the
jamming pulses duration to the transmission duration can be as low as
10
4. We investigate and analyze the performance of combining a
cryptographic interleaver with various coding schemes to improve the
robustness of wireless LANs for IP packets transmission [1]. A
concatenated code that is simple to decode and can maintain a low
frame error rate (FER) under a jamming effort ratio of 15%.We argue
that LDPC codes will be very suitable to prevent this type of
jamming.We investigate the theoretical limits by analyzing the
performance derived from upper bounds on binary error-control
codes. We also propose an efficient anti-jamming technique for
IEEE802.11b based on Reed–Solomon codes.