共查询到17条相似文献,搜索用时 407 毫秒
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多通道SAR层信元传输技术研究 总被引:2,自引:2,他引:0
ATM是宽带综合业务数字网的主要实现技术。文章分析了ATM协议栈中SAR层工作原理,根据AAL5业务SAR层对数据的处理过程,提出了两种基于FPGA的多通道SAR层信元拆分技术的解决方案;分析比较了两种方案实现过程及对内存空间的使用情况,指出了各个方案适用的场合,对基于FPGA的ATM协议的开发及替代专用通信处理芯片具有重要意义。 相似文献
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ATM传输汇聚子层及其UTOPIA接口的FPGA实现 总被引:4,自引:0,他引:4
ONT是实现APON接入系统中光纤入户的重要设备,其TC子层及与ATM层接口芯片的开发是ONT产品的重要组成部分。本文结合ONT的具体研制工作,提出了传输汇聚子层(TC)及其同ATM层UTOPIA接口的模块化设计方案及FPGA芯片的选择。 相似文献
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ONT是实现APON接入系统中光纤入户的重要设备,其TC子层及与ATM层接口芯片的开发是ONT产品的重要组成部分。本文结合ONT的具体研制工作,提出了传输汇聚子层(TC)及其同ATM层UTOPIA接口的模块化设计方案及FPGA芯片的选择。 相似文献
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IP核可重用设计方法是未来大规模集成电路的主流设计方法.本文论述了在设计光网络终端ONT传输会聚(TC)层上行组帧中,一种将IP核模块与VHDL语言描述相结合的ATM信元存储方案,并用FPGA予以实现,得出IP核设计方法的优越性. 相似文献
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在介绍光传送网分层结构及各层网络原子功能的基础上,对各层网络原子功能具体的技术实现方式进行了探讨,并把出相关的技术热点和未来的发展方向。 相似文献
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本文针对实现B-ISDN的核心技术之一的ATM层规约进行了研究。分析了ATM层规约的工作机制,继而设计了ATM层规约的实现电路并在电子电路CAD系统上调试通过,并对ATM层规约的性能变化规律进行了研究。 相似文献
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介绍了一种用于通信网络的APON无源光网络系统,该系统通过ATM交换模块实现信号的转换与传输,主要讨论了ATM交换的原理、交换单元的结构以及APON系统中交叉连接的实现。 相似文献
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IP核可重用设计方法是未来大规模集成电路的主流设计方法。本文论述了在设计光网络终端ONT传输会聚(TC)层上行组帧中,一种将IP核模块与VHDL语言描述相结合的ATM信元存储方案,并用FPGA予以实现,得出IP核设计方法的优越性。 相似文献
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Harald Kröll Stefan Zwicky Benjamin Weber Christian Benkeser Qiuting Huang 《Journal of Signal Processing Systems》2013,73(3):301-314
The open source GSM protocol stack of the OsmocomBB project offers a versatile development environment regarding the data link and network layer. There is no solution available for developing physical layer baseband algorithms in combination with the data link and network layer. In this paper, a baseband development framework architecture with a suitable interface to the protocol stack of OsmocomBB is presented. With the proposed framework, a complete GSM protocol stack can be run and baseband algorithms can be evaluated in a closed system. It closes the gap between physical layer signal processing implementations in Matlab and the upper layers of the OsmocomBB GSM protocol stack. An embedded version of the system has been realized with FPGA and PowerPC to enable real-time operation. The functionality of the system has been verified with a testbed comprising an OpenBTS base-station emulator, a receiver board with RF transceiver and our developed physical layer signal processing system. 相似文献
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Joy D.A. Ciesielski M.J. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1992,80(2):311-331
The layer assignment problem arises in printed circuit board (PCB) and integrated circuit (IC) design. It involves the assignment of interconnect wiring to various planes of a PCB or to various layers of interconnect wires in an IC. This paper reviews basic techniques for layer assignment in both PCBs and ICs. Two types of layer assignment are considered: (1) constrained layer assignment in which routing of interconnections is given and the objective is to assign wires to specific layers, and (2) unconstrained, or topological, layer assignment, in which both the physical routing of interconnections and assignment of the wires to layers is sought. Various objective functions, such as via minimization and minimization of signal delays through interconnect lines are discussed 相似文献
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提出了基于管理技术的ATM网络抗毁性组织结构概念,指出了在网络规划设计与维护管理阶段进行层次化技术处理的重要性。ATM网络抗毁性组织结构要求在网络规划设计阶段、运用各种规划算法和仿真技术进行抗毁性设计与验证;在网络管理维护阶段,从网络各个层次,运用各种管理算法或机制维护网络抗毁性。在网络实际运行过程当中,该组织结构强调联合应用网络各层次上的抗毁性管理技术,充分发挥各个层次上的抗毁性,以提高整个网络抗毁性能。 相似文献
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User demand for more bandwidth and QoS support has fueled interest in the use of ATM as an underlying link-layer technology in the Internet. The challenge is how best to exploit the potential benefits of ATM while maintaining the inherent strengths of the IP layer that have made the Internet so successful. The suitability of various schemes with regard to meeting these goals is described. In particular we focus on recent work that tightly integrates the IP and ATM layers to produce hybrid (or integrated) ATM switch/IP routers with very favorable characteristics 相似文献