Ubiquitous Distribution Network Environment / Subscribe Routing System

The ubiquitous network is a widely-used network in which the network can work on anywhere with anything by anyone from soup to nuts, thus it is possible that people communicate with both other persons and things they are interested in. Users and terminals in the ubiquitous network all have the characteristic of asynchronous nature and moving frequently. It’s an issue that how to provide one publish/subscribe routing method effectively, autonomous and reliable. Currently, many work have been done about the ubiquitous network and publish/subscribe communication model. However, for this kind of researches about publish/subscribe routing in the ubiquitous network are still very scare.For the reason of many problems on existing ubiquitous network and publish/subscribe model that expression is so weak. In this paper, based on the content-based publish/subscribe model, we have proposed a publish/subscribe communication on the ubiquitous network, which has given the design of a new model structure, and the event definition based on space, time and other constraints of it. We also have described the workflow party for subscriptions and publications.Secondly, the participants of the publish/subscribe system are often distribute and move frequently in the ubiquitous network. And it caused that the subscriptions and events are sent frequently. Therefore, we need to provide one appropriate routing algorithm to solve the above problem. In the paper, we have provided a routing algorithm which is based on location and grouping. The routing algorithm is self-repaired and self-organizing, which targets the trend of the cluster network and moving frequently on the principle of reducing the network load and routing overload.At last, we proved the LBG routing algorithm in the ubiquitous network publish/subscribe model and verified it with two typical routing algorithms.