Abstract:

As jamming attack can interrupt signal decoding and severely reduce communication performance, an adaptive rateless communication mechanism is proposed to reduce the interference effect of jamming attack.With the help of rateless codes, a packet is split into multiple encoded micropackets and then transmitted independently,which can reduce the impact of interference and take advantage of the noncontiguous available channel. By adaptively adjusting the length of the micropacket,better robustness can be achieved by using a smaller length when the attacks occur frequently.Meanwhile, high efficiency can be obtained by increasing the micropacket length when attacks occur rarely.Experimental results show that, in comparison with direct transmission,rateless transmission can improve the throughput by 50% on average,and the stability by an order of magnitude.In summary, rateless communication can effectively resist jamming attacks and achieve high communication efficiency.

Key words: jamming attack;rateless codes;adaptive mechanism;throughput;wireless networks