An on - demand synchronization code division multiple access odscdma protocol for the mobile ad hoc network was proposed . the protocol established the temporary synchronization between the sending node and receiving node only when they are communicating . . 协议仅在通信时在收发节点间建立临时的同步,综合了同步与异步mac协议的优点,通过时隙预留,功率控制和cdma技术来提高网络的性能。