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In the area of device collaboration system, there are a large number of devices which needed to be collaborated with other devices, and the collaboration process is complex. It is significative to reduce the complexity of modeling a device collaboration process. In this paper, a device collaboration process model is proposed, which includes four basic structures. By use of device collaboration net, the modeling rules of the basic structures are proposed. By using a collaborative process modeling example, the modeling rules are described.

IPv6 has lots of advantages than IPv4, and is suitable for large-scale applications. Based on the analysis of requirement of large-scale area management, a new IPv6-based large-scale lighting devices e-Management System is introduced, the architecture is proposed, and a prototype system is implied. In order to verify the performance of the system, experiments are done. It is proved that system architecture is appropriate, and the performance is good.

Future wireless must be able to integrate most different heterogeneous IP-based networks and supply the user coordinate service without a broken connection within a diverse and overlay access network environment. One of the most challenges of wireless network integration is handover decision. To select the best network considering various network attributes, we present a network evaluation method (NEM) as a genetic criterion with user preference and usual estimation standards. With NEM, our handover decision can support not only vertical handover, also horizontal handover meanwhile by comparing cells available in current network. Furthermore, we propose a new prediction algorithm (DGRAD) to predict monitoring values of each factor prior to handover execution phase which addresses more accurate input parameters into NEM functions and provide reasonable final handover suggestions for users.