If there is a node need to communicate the other node , it has to calculate the other node ’ s scan channel which will be it ’ s call channel . the call synchronization protocol will be implement to fulfill the end - to - end link establishment 網(wǎng)內(nèi)若有節(jié)點需要和其他節(jié)點建立點到點連接,主叫節(jié)點便使用同步呼叫協(xié)議在呼叫信道上實現(xiàn)點到點的鏈路建立。
It is composed of three mian protocols : call synchronization protocol , control frame transmission protocol based on arq mechanism and data transmisstion protocol based on slot precontract mechanism . one scan channel table is shared in the hfmanet . the nodes in the same dwell group work in the same scan channel , and the nodes in the different dwell group work in the different scan channel 該協(xié)議的網(wǎng)絡拓撲結(jié)構(gòu)采用分布式分群結(jié)構(gòu),協(xié)議不同于傳統(tǒng)的短波點到點及需要中心節(jié)點轉(zhuǎn)發(fā)的組網(wǎng)方式,而是初步實現(xiàn)了短波電臺之間多跳組網(wǎng)功能,其協(xié)議內(nèi)容主要包括同步呼叫協(xié)議、基于arq的控制幀傳輸協(xié)議和基于虛電路及時隙預約方式的數(shù)據(jù)幀傳輸協(xié)議。