求翻译：随着移动互联网的快速发展，以及用户对网络需求的多样化，运营商为了提高市场竞争力，各种无线接入技术被开发出来，各种终端设备也有多个模式接口，能接入不同的无线接入网络。因此，异构无线网络融合是下一代移动互联网发展的趋势之一。网络选择问题是异构无线网络融合需要解决的一个重大课题，即多模终端如何选择最适当的网络，使用户得到满意的服务，并且使网络负载均衡。各大服务产业都提倡以人为本，顾客就是上帝，因此本文在研究网络选择问题主要从用户的角度出发，注重用户的体验，同时为了避免网络的拥塞导致服务质量下降，通过对服务收取费用来控制。是什么意思？

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As the mobile Internet of fast development, as well as the user of the network needs diversification, the carrier, in order to increase their competitiveness on the market, and various wireless access technologies have been developed, and various end devices can also have more than one mode interfac

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With the rapid development of mobile Internet, as well as the diversification of user demand for network operators in order to improve the market competitiveness, a variety of wireless access technologies have been developed, various terminals also have more than one mode interface can access differ

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