针对传统嵌入式以太网系统存在的数据传输速率低、硬件不能升级、实时性和通用性不足等问题,提出了基于内嵌有Nios II CPU的Altera Cyclone系列FPGA的以太网控制器设计方案.该方案针对以太网协议利用Quartus II和Nios II IDE为开发工具...针对传统嵌入式以太网系统存在的数据传输速率低、硬件不能升级、实时性和通用性不足等问题,提出了基于内嵌有Nios II CPU的Altera Cyclone系列FPGA的以太网控制器设计方案.该方案针对以太网协议利用Quartus II和Nios II IDE为开发工具,对硬件进行重新配置,以提高系统集成度;采用SOPC技术构建了嵌入式网络硬件平台;基于μC/OS-II实现了Niche Stack TCP/IP协议栈的移植及顶层应用程序的编写.系统测试结果表明,数据能够以400 Mb/s的速率正确收发,满足了以太网通信速率的要求,并可根据实际情况灵活配置.展开更多
With the rapid development of the embedded technology, research and implement of the Internet of things will be a new technology revolution, yet the implement of the Internet of things is on the base of the communicat...With the rapid development of the embedded technology, research and implement of the Internet of things will be a new technology revolution, yet the implement of the Internet of things is on the base of the communication between the things. For this reason, realizing the function of communication between singlechip is particularly important. Based on the characteristics of the embedded microcontroller, we analyzed the traditional PC TCP/IP protocol, and appropriately tailored TCP/IP protocol cluster on the basis of the characteristics of embedded singlechip. At last, we realized the reduced TCP/IP protocol cluster suitable for embedded singlechip, on AVR singlechip platform.展开更多
随着空间通信系统的发展,CCSDS建议逐渐成为了空间通信的标准,特别是IP over CCSDS Space Links红皮书提出以后,IP已经成为空间信息系统的标准上层应用。提出了一种天地通信系统CCSDS加速网关的设计实现方法,介绍了基于加速网关的天地...随着空间通信系统的发展,CCSDS建议逐渐成为了空间通信的标准,特别是IP over CCSDS Space Links红皮书提出以后,IP已经成为空间信息系统的标准上层应用。提出了一种天地通信系统CCSDS加速网关的设计实现方法,介绍了基于加速网关的天地通信网络结构,描述了其关键技术实现,最后对提出的设计实现方法在OPNET中进行了仿真验证。OPNET仿真结果表明,该技术大大提高了TCP应用在空间链路上的传输效率,而且在多连接共享带宽时保持了较好的公平性。展开更多
文摘针对传统嵌入式以太网系统存在的数据传输速率低、硬件不能升级、实时性和通用性不足等问题,提出了基于内嵌有Nios II CPU的Altera Cyclone系列FPGA的以太网控制器设计方案.该方案针对以太网协议利用Quartus II和Nios II IDE为开发工具,对硬件进行重新配置,以提高系统集成度;采用SOPC技术构建了嵌入式网络硬件平台;基于μC/OS-II实现了Niche Stack TCP/IP协议栈的移植及顶层应用程序的编写.系统测试结果表明,数据能够以400 Mb/s的速率正确收发,满足了以太网通信速率的要求,并可根据实际情况灵活配置.
文摘With the rapid development of the embedded technology, research and implement of the Internet of things will be a new technology revolution, yet the implement of the Internet of things is on the base of the communication between the things. For this reason, realizing the function of communication between singlechip is particularly important. Based on the characteristics of the embedded microcontroller, we analyzed the traditional PC TCP/IP protocol, and appropriately tailored TCP/IP protocol cluster on the basis of the characteristics of embedded singlechip. At last, we realized the reduced TCP/IP protocol cluster suitable for embedded singlechip, on AVR singlechip platform.
文摘随着空间通信系统的发展,CCSDS建议逐渐成为了空间通信的标准,特别是IP over CCSDS Space Links红皮书提出以后,IP已经成为空间信息系统的标准上层应用。提出了一种天地通信系统CCSDS加速网关的设计实现方法,介绍了基于加速网关的天地通信网络结构,描述了其关键技术实现,最后对提出的设计实现方法在OPNET中进行了仿真验证。OPNET仿真结果表明,该技术大大提高了TCP应用在空间链路上的传输效率,而且在多连接共享带宽时保持了较好的公平性。
