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网络发展IP化是技术发展趋势的显著特征。IP传送网络为各种业务提供了承载平台,而业务的提供依靠端到端的解决方案,所以IP城域网的优化和改造是非常重要的。IP城域网是各地市的宽带、窄带等IP业务的传送平台,所有IP业务都将在城域网内接入。因此,为不同地区构建一个适合该地区业务需求的城域网,是未来几年网络规划建设工作的重中之重。为了使读者进一步了解IP城域网的发展情况,本期特别邀请了中国电信集团股份有限公司的技术专家撰文介绍IP城域网的现状、发展趋势、标准、关键技术、设备要求等,以期对广大读者有所帮助。
IP network development is a significant feature of the trend of technological development. The IP transport network provides a bearer platform for various services, and the service provided depends on the end-to-end solution. Therefore, optimization and modification of the IP MAN are very important. IP Metropolitan Area Network (MAN) is a transmission platform for IP services such as broadband and narrowband in all cities and all IP services are accessed in the MAN. Therefore, building a metropolitan area network for different areas that suits the business needs of the area is a top priority for network planning and construction in the coming years. In order to make readers know more about the development of IP MAN, this issue specially invited the technical experts from China Telecom Group Co., Ltd. to introduce the current situation, development trend, standards, key technologies and equipment requirements of IP MAN. The majority of readers helpful.