随着通信技术的飞速发展和电信市场的逐步开放，电信业的一个最重要的发展趋势就是业务运营商和网络运营商的分离：由网络运营商提供可靠且高效的基础承载平台，由业务提供商提供各种应用。相对于承载系统而言，由于直接面向不同的用户需求，应用系统要复杂得多，这就决定了在 With the rapid development of communication technology and the gradual opening up of the telecommunications market, one of the most important trends in the telecommunications industry is the separation of service operators from network operators: the network operators provide a reliable and efficient base bearer platform, which is provided by the services Provide a variety of applications. Relative to the bearing system, due to directly facing different user needs, application system is much more complex, which determines the