Multi-channel ad hoc networks are promising technology to alleviate the spectrum scarcity in dense networks. The main challenge for channel access in distributed multi-channel ad hoc networks is channel synchronization and competition with neither common control channel nor dedicated control transceiver. In this paper, a Tight Synchronized MAC protocol with distributed synchronization and competition process without any dedicated control channel is proposed. The protocol uses a simple handshaking mechanism to create a channel table for each node, which contains its neighbors and channels’ status. By this, any node knows the priority of its channels and also the priority of neighbors’ channels. By assigning priorities, a sender node starts synchronization. If sender and receiver nodes have a common channel, the proposed method finds it directly or indirectly using the common neighbor mechanism. The other feature of the proposed scheme is using a fair preemptive data transmission phase, which reduces the number of switchings along data transmission. The fair preemptive mechanism is achieved by an analytical solution to estimate the number of competing nodes and thus, estimates the number of assigned data slots. Simulation results show the performance improvements in terms of synchronization delay and packet delivery ratio over HMMAC and MSRMMAC protocols.

多通道ad hoc网络是缓解密集网络中频谱稀缺的有前途的技术。分布式多通道ad hoc网络中通道访问的主要挑战是通道同步和与通用控制通道或专用控制收发器的竞争。本文提出了一种具有分布式同步和竞争过程且没有任何专用控制信道的紧密同步MAC协议。该协议使用一种简单的握手机制为每个节点创建一个通道表，其中包含其邻居和通道状态。由此，任何节点都知道其信道的优先级以及邻居信道的优先级。通过分配优先级，发送方节点开始同步。如果发送方和接收方节点具有公共通道，所提出的方法使用公共邻居机制直接或间接地找到它。所提出的方案的另一个特征是使用公平的抢先数据传输阶段，这减少了沿数据传输的切换次数。通过分析解决方案来估计公平竞争机制，以估计竞争节点的数量，从而估计分配的​​数据时隙的数量。仿真结果表明，在同步延迟和数据包传送率方面，性能得到了改善。估计分配的​​数据插槽的数量。仿真结果表明，在同步延迟和数据包传送率方面，性能得到了改善。估计分配的​​数据插槽的数量。仿真结果表明，在同步延迟和数据包传送率方面，性能得到了改善。HMMAC和MSRMMAC协议。