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| Content Provider | ACM Digital Library |
|---|---|
| Author | Haus, Michael |
| Abstract | The problem domain of my PhD thesis is divided into two parts. First, we introduce position aware systems including the well-known Location-based Services (LBS) and Proximity-based Services (PBS) as subclass of LBS. The study [33] reports that 19% of the world's mobile users already using LBS and the most popular application is the navigation via maps and GPS signal. Furthermore, one in five (22%) of LBS users enrich their social lives by finding friends in the nearby environment. For example, MobiClique [26] alerts users when other users are in physical proximity and share a relationship with them based on profile and friend list. The LBS are based upon the absolute position of an user to answer the question "where we are?". In contrast, PBS are based upon context information to find co-location with other points of interest to answer the question "who are we with?". The goal of LBS and PBS is to improve the users' daily lives by providing a personalized service to enable sharing of location information and location-aware information retrieval. Therefore, the LBS focus on a centralized architecture, the location server acts as Trusted Party (TP) which receives coordinates from the users to provide location-specific information, e.g. nearby friends. Figure 1(a) shows the common LBS architecture consisting of four major entities: mobile devices, global positioning systems, communication networks and service providers [29]. However, the assumption of a TP is questionable [36]. Besides that, most of the LBS use global positioning systems, which limits their functionality to outdoor environments, although people spend the majority of their time indoors [2]. |
| Starting Page | 417 |
| Ending Page | 422 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781450344623 |
| DOI | 10.1145/2968219.2971352 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2016-09-12 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Content Type | Text |
| Resource Type | Article |
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