基于嵌入式Linux的3G无线视频终端的设计与实现

摘要

基于嵌入式系统开发以及3G相关技术,采用ARM+Linux作为软硬件开发平台,充分利用了ARM以及Linux 系统丰富的软硬件资源,设计并实现了一个基于嵌入式Linux的3G无线视频终端.在软件设计上,采用了Linux的Netfiher架构与socket结合的方法,引入内核缓冲机制,达到了将数据包获取功能由用户态转入内核态,实现了数据包在Linux内核态的获取及高效转发,并且解决了3G模块因拨号延迟与视频服务器产生速率不匹配所造成的数据丢包问题,同时在嵌入式Linux下为3G模块开发了驱动.%Based on embedded system's development and 3G related technology,using ARM + Linux as the software and hardware development platform,and taking full advantage of ARM + Linux software and hardware resources,a 3G wireless video terminals based on embedded Linux was designed and implemented. In software design,the Linux's Netfilter framework combined with socket was used,Linux kernel buffer mechanism was introduced,it achieved the function of data packet get from user mode into kernel mode.realized data packet achieving and efficient transmission,and solved the problem of time delay between video server and 3G module, meanwhile,a 3G module driver was developed.