Frequency hopping sequences with low hit zone is significant for application in quasi synchronous multiple-access systems. In this paper, we obtained two constructions of optimal frequency hopping sequence sets with low hit zone based on interleaving techniques. The presented low hit zone frequency hopping sequence sets are with new and flexible parameters and large family size which can meet the needs of the practical applications. Moreover, all the sequences in the proposed sets are cyclically inequivalent. Some low hit zone frequency hopping sequence sets constructed in literatures are included in our family. The proposed frequency hopping sequence sets with low hit zone are contributed for quasi-synchronous frequency hopping multiple access system to reduce or eliminate multiple-access interference.

Time slot is valuable channel resource in the data link network based on TDMA architecture. As a pseudo-random sequence, the control sequence can be used to help users efficiently allocate the limited time slot resources, so as to achieve maximum resource utilization. In this paper, we propose a class of control sequences set that not only have good randomness and long-period properties, but also enable terminal users to have good self-organization capabilities. Meanwhile, the data link network can realize higher utilization of time slot resources to maximize the network channel capacity based on the control sequences set. Therefore, terminal users can access the network randomly with anti-eavesdropping capability.