The Research And Implementation Of Outdoor And Indoor Lbs Model

With the rapid popularity of Mobile Internet and Smart Mobile phones, the market demand of the mobile application is also soaring up. As a significant part of mobile applications, location-based service is taking great advantage of this trend. Research on innovation mode of LBS applications, especially the application frameworks technology of LBS, is the hot research spot of software architecture of the Mobile Internet.The recently passed LBS applications heat in Mobile Internet has witnessed the applications’short-comings, such as most LBS applications followed the same pattern that centered on "Check in" characteristic, service realization is based on simple vertical type software framework, which is lack of diversity and causes a problem of serious competition of the homogeneity of applications. Traditional LBS mainly uses the GPS positioning function, so that LBS applications can’t offer services in indoor environment, in which80%of human activities take place. Hence, researching LBS model framework, which is suited for outdoor and indoor environment and fuses various positioning method, is the key to further development of LBS applications.This paper focused on the research of LBS model framework, which is under outdoor and indoor environment and mixed of multiple location mode, carefully analyzed most of common LBS application services and summarized their commons. Furthermore, referenced with current theoretical achievement of outdoor and indoor mix mode positioning of the author’s laboratory, this paper comes out with an outdoor and indoor LBS common service model, based on which the author developed some typical LBS applications.The paper’s main work is listed as follows:(1) The paper researched the positioning services and navigation services in the LBS model and designed protocols for information interchange of the services, along with the implementation of the two services.(2) It is a crux in the development process of Mobile Internet personalization to distribute LBS information according to user’s demands. This paper comes out with an LBS PUB/SUB model, along with the service framework based on the research and design of the publish/subscribe mechanism in LBS applications and implementation of the service. The achievement has become a form of a paper and be published in an international meeting.(3) LBS information recommendation is a representative service of LBS model. The author compared several recommendation algorithms and brings out a user-history-position based recommendation method. Meanwhile, with the introduction of ratings recommended system, the paper gives out a two-dimensional LBS recommendation service framework which at last turns into an implementation of item-similarity-based and user-item-similarity-based recommendation service.Finally, this paper brings out a real-environment test for the implemented representative application service, and the software is applied in underground mall of the Beijing International Trade Building. The outcome of these tests satisfied service functionality and performance requirements. The paper’s research of outdoor and indoor LBS model and implementation of representative application services, thus have a reference value to the related works.