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　　Playing multimedia data with mobile devices is the trend in mobile computing. However, roaming around networks has the session continuity problem because of Internet routing fundamentals. Although current proposals may handle the session continuity problem, they either incur unacceptable overheads or need applications or users to be aware of the movements. The former has negative impacts on multimedia communication while the latter burdens developers in designing their products and people in using the applications.
　
　　In the paper we propose the session splice approach on multimedia communication for mobile computing. It permits a mobile device to establish multimedia communication directly with a streaming server while roaming. Accordingly, it has following advantages. Firstly, it maintains the mobility transparent to applications so applications and users are not aware of the movements. Secondly, multimedia applications can work directly on it without any modification, which is useful when application source codes are not available. Thirdly, it keeps the streaming server intact and maintains the compatibility with Internet protocols. Fourthly, it can work without Mobile IP and hence it has neither the triangular route problem nor the need to deploy agents. We implement the session splice approach in Windows 2000/XP. In the experiments with two multimedia applications, we prove that the session slice approach with the negligible overhead can conserve home network bandwidth and maintain stable variation of packet round trip time.

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