Research And Implementation Of Policy Control In Internet Of Things

The IoT is an information carrier based on the Internet and traditional telecom network,so that it can be applied to achieve an interconnection network by ordinary physical objects which can be individually addressed.The research of policy control in the IoT is to solve the contradiction between real-time control and QoS of network in open environments,at the same time,is to adapt to the control methods of different terminal under the open conditions in the IoT.Firstly,the structure of the policy control in the IoT is studied and designed in this thesis.The control structure is realized based on the three-tier architecture of the Internet of Things,which is conducive to improving the contradictions between the real-time control and the QoS of network,at the same time conducive to enhance the ability of autonomy-control in a local control network and real-time control throught setting the strategy generation and strategy matching in far and near ends which construct and design the hierarchical control structure based on strategy.Secondly,the rule engine algorithm and its improvement measures are discussed,which is used in the structure of the policy control.In this thesis,according to the Rete algorithm,how to design a Rete network and how to use the Rete network for policy matching and generation are analyzed respectively.What's more,the node sharing and rule-based cache optimization scheme are proposed.Finally,the poloicy control based on the strategy is implemented from the perspectives of the IoT cloud platform and the IoT gateway.The control structure and the function of the control system are tested and verified through three distributed control scenes.It shows that the system based on policy control is feasible and effective...