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基于分组网络的电路仿真服务在分组网络上提供了一种传输传统电路交换业务的方法,对于现代网络融合具有重要意义。为了实现分组网络中的E1信号传送,提出一种分组电路仿真处理芯片的实现方案,并完成了芯片设计及应用试验。芯片实施协议符合IETF(internet engineeringtask force)PWE3(pseudo wire emulation edge-to-edge)工作组的相关建议草案,芯片内部集成全数字自适应时钟提取算法和服务恢复策略。目前基于该芯片方案的验证系统已经通过了10~100 Mb以太网和802.11a无线网络的环境测试。结果表明:该实现方案能够有效抑制分组网络传输抖动和传输误码导致的服务失效,可以应用于多种网络环境。
The circuit simulation service based on packet network provides a method for transmitting traditional circuit switched services on packet networks, which is of great significance for modern network convergence. In order to realize the E1 signal transmission in the packet network, an implementation scheme of the packet circuit simulation processing chip is proposed, and the chip design and application test are completed. The chip implementation protocol is in line with the draft recommendations of the IETF (pseudo wire emulation edge-to-edge) PWE3 working group. The chip integrates an all-digital adaptive clock extraction algorithm and a service recovery strategy. At present, the verification scheme based on this chip scheme has passed environmental tests of 10-100M Ethernet and 802.11a wireless networks. The results show that the proposed scheme can effectively suppress service failures caused by jitter in packet networks and transmission errors and can be applied in many kinds of network environments.