【作者】 杨吉云；

【导师】 王铮；

【作者基本信息】 重庆大学 ， 计算机软件与理论， 2003， 硕士

【摘要】 无线电台是现代战争中一种常用的指挥工具，它以无线电波为载体，传输话音、字符和数据等各种作战信息。按照无线电波频率的变化特征，无线电台可分为“固频电台”和“跳频电台”两大类。由于高速电台应用安全的要求，需要高速电台在无数据通信任务的时候保持无线电静默，因此高速电台工作时有两种状态：数传状态和静默状态。处于静默状态的电台不能够与其它电台保持跳频同步，不能够接收其它电台发送的数据，也不能够发送任何数据。如果处于静默状态的电台需要与其它电台通信，它必须转入数传状态。目前高速电台的主要功能主要是完成点对点的模拟语音的通信，随着现代战争的不断需求，高速电台的用途需要被扩展。它要求不仅仅可以完成点对点语音的通信，还应该可以完成多跳的数据通信。同时由于在作战时电台处于移动状态，所以数据传输时还应该可以动态的选择传送路径，即要求组成网络的高速电台都具有动态路由的功能。另外，由电台组成的网络应该是无中心的网络，即ad-hoc。要在电台上实现上述的功能，必须有一个控制电台数据通信的协议体系。目前广泛使用的无线局域网协议有蓝牙、IEEE 802.11家族、HomeRF等，这些局域网都分别有自身的特点、不同的应用场合以及与之相适应的物理层。该研究是在不改变高速电台固有属性的基础上实现多跳的数据通信，因此不能将上述几种局域网协议直接应用于高速电台上进行数据通信。解决该问题的办法是以IEEE 802.11协议为基础，然后对其不适应高速电台部分进行改造、删除以及添加，使之适应高速电台的要求。对IEEE 802.11改造的部分是同步机制以及帧的格式。同步机制的改造主要是针对IEEE 802.11同步机制的定期发送信标进行改造，把它变为非定期的发送。而帧格式则是根据修改了后的协议，改造了原帧格式中不适应的部分。对IEEE 802.11中丢弃部分包括鉴权和加密、电源管理部分以及整个物理层。同时还针对电台完成多跳数据通信的要求，在协议中加入了无线路由更多还原

【Abstract】 The radio station is in common used as a command tool in modern war, it uses the radio wave as the media to transmit voice、word、data and all kind of battle information. According to the variety characteristic of frequency, radio station can be divided into two types:" fixed-frequency radio" and "hop-frequency radio". Because of the safety’s request of the super-speed station’s application, the super-speed station should hold the radio silence state when it hasn’t the task of data communication, therefore when the super-speed station is working it has two kinds of statuses: communication state and radio silence state. When the station is in radio silence state, it can’t keep frequency hopping synchronization with other station , and can’t receive the other station the data that send out, and also can’t send out any data. If the station that is in radio silence state need communicate with other station, it must turn to communication state.Now the main function of the super-speed radio station primarily is a correspondence that complete the communication of emulation voice between two points, along with the modern war of continuously require with, the use of the super-speed radio station the demand is expanded. It shouldn’t only complete the communication of voice between two points, it also should be able to complete the data communication that need more station’s join. At the same time because the super-speed radio station may hold in moving state when it’s working, the radio station should dynamically select the path for the data transmitting, it indicates that the radio station should have dynamic routing function. Moreover, the network that is constructed with radio station has no center, namely it’s ad- hoc. If the station wants to realize on the above function, the radio station must have a protocol system that controls the data communication between stations. Now there are many wireless local network protocols that have been extensively used, those protocols contain bluetooth、IEEE 802.11 series、 HomeRF...etc. Those wireless local network protocols all respectively contain it’s own characteristics、different application situation and different physic layer. The study can realize data communication that need more station’s join but doesn’t change the attribute of super-speed radio station, for this reason those wireless local protocols can’t directly be applied to super-speed radio station to control the data communication. Solution of this problem is to change、delete and add on the base of IEEE 802.11. Through this can make a new protocol that is suitable for the requirement of super-speed station.<WP=6>The changing part of IEEE 802.11 contain synchronous mechanism and format frame. In the synchronous mechanism of IEEE 802.11 a beacon will be periodically sent out, the manner of beacon will be changed. In this study the beacon will not be periodically sent out. According to the modified protocol some part of the frame format that aren’t applicable have been changed. In the new protocol the authentication and privacy, power management and whole physic layer of IEEE 802.11 are deleted. At the same time in order to satisfy the requirement of data communication that need more station’s join, wireless route has been added in the new protocol更多还原