tailieunhanh - AUTOMATION & CONTROL - Theory and Practice Part 12

Tham khảo tài liệu 'automation & control - theory and practice part 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 266 AUTOMATION CONTROL - Theory and Practice to locate required resources that may be shared by some servents connected to the network. The protocol requires that within the network exists at least one always-on node which provides a new participant with addresses of the servents already operating. Each servent upon startup obtains a pool of addresses and connects to them. In order to discover other participants it starts the PING PONG process presented in Figure 9. Fig. 9. Propagation of PING and PONG messages in Gnutella discovery process. Conclusions and future work We have presented three different approaches of building distributed peer-to-peer infrastructure in multiplatform environments. By the means of inter-platform discovery we give agents the opportunity to communicate share services and resources beyond the boundaries of their home platforms. Future work will include incorporating one of the described methods into the UBIWARE prototype. We also plan to conduct further research upon improving the efficiency of created network of agent platforms. 8. Conclusion and future work In this chapter we present several challenges for achieving the vision of the Internet of Things and Ubiquitous Computing. Today s development in the field of networking sensor and RFID technologies allows connecting various physical world objects to the IT infrastructure. However the complexity of such a system may become overwhelming and unmanageable. Therefore there is a need for computing systems capable of running themselves with minimal human management which is mainly limited to definition of some higher-level policies rather than direct administration. We believe that this complexity can be solved by incorporating the principles of multi-agent systems because of its ability to facilitate the design of complex systems. Another challenge that has to be faced is the problem of heterogeneity of resources. Semantic technologies are viewed today as a key technology to resolve .