ARM-Linux环境下UDP协议的通信应用研究  

The Application Research of Communicating Based on ARM-Linux Environment and UDP-Protocol

作　　者：崔浩[1] 邵平凡[1] CUI Hao,SHAO Ping-fan （Wuhan University of Science and Technology,Wuhan 430000,China）

机构地区：[1]武汉科技大学计算机学院,湖北武汉430000

出　　处：《电脑知识与技术》2011年第5期3001-3003,3008,共4页Computer Knowledge and Technology

摘　　要：进行UDP协议通信时,发送端和接收端的状态是相对独立的,发送端不与接收端建立连接,而是不停向接收端发送,为了确保不丢失报文,上位机采取了按固定次数重发相同内容报文的机制。这种机制虽然可以有效确保报文不丢失,但大量冗余数据报被发送,网络资源利用率不高。显然重发次数越多,冗余数据报越多,效率越低。要想有效保证数据报准确发送的同时又不产生过多冗余数据报,那么重复发送的次数的确定就成为问题的关键。以下给出一种确定上位机重发次数的方法。The sender and receiver are relatively independent when communicating under UDP-protocol,the sender resending messages to receiver times instead of creating a connection.A resend-mechanism that the key-messages were send by upper computer in fixed times,was used in order to ensuring not to lost key-message.Although the resend-mechanism can ensure that the key-message wouldn＇t be lose anyway,but abundant of redundancy messages were send through the network device lead to inefficency,obviously more resend-times more inefficency.So,how to determine the resend-times become the crucial to improve the efficiency while ensuring the messages were send accurately.A method of determining the resend-times will be given as following.

关 键 词：ARM LINUX 交叉编译环境 UDP协议 重发机制 重发次数 

分 类 号：TP393[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]