在移动网上，由于接入方式的限制，使得即时消息业务无法很好的开展；

Secondly, in the mobile network, because of the restriction of accessing method, IM service can't be developed very well.

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即时消息业务具有通信便捷和价格低廉等优点，是下一代网络中不可或缺的业务之一。

With features of nearly real time communications and low cost, instant messaging become so important services in NGN that it is necessary for Softswitch to provide basic ability of instant messaging.

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伴随互联网和移动网的迅猛发展，即时消息业务已经成为一种用户之间进行实时信息传递的主要手段。

With the rapid development of the Internet and the mobile network, Instant Message service has become a key method for transmitting real-time information.

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