Jeong Seol Young, Jo Hyeong Gon, Kang Soon Ju
School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, Korea.
Sensors (Basel). 2014 Mar 21;14(3):5702-24. doi: 10.3390/s140305702.
A tracking service like asset management is essential in a dynamic hospital environment consisting of numerous mobile assets (e.g., wheelchairs or infusion pumps) that are continuously relocated throughout a hospital. The tracking service is accomplished based on the key technologies of an indoor location-based service (LBS), such as locating and monitoring multiple mobile targets inside a building in real time. An indoor LBS such as a tracking service entails numerous resource lookups being requested concurrently and frequently from several locations, as well as a network infrastructure requiring support for high scalability in indoor environments. A traditional centralized architecture needs to maintain a geographic map of the entire building or complex in its central server, which can cause low scalability and traffic congestion. This paper presents a self-organizing and fully distributed indoor mobile asset management (MAM) platform, and proposes an architecture for multiple trackees (such as mobile assets) and trackers based on the proposed distributed platform in real time. In order to verify the suggested platform, scalability performance according to increases in the number of concurrent lookups was evaluated in a real test bed. Tracking latency and traffic load ratio in the proposed tracking architecture was also evaluated.
在由众多移动资产（如轮椅或输液泵）组成的动态医院环境中，像资产管理这样的跟踪服务至关重要，这些移动资产在医院内不断重新安置。跟踪服务是基于室内定位服务（LBS）的关键技术实现的，例如实时定位和监控建筑物内的多个移动目标。诸如跟踪服务之类的室内LBS需要同时并频繁地从多个位置请求大量资源查找，并且需要一个在室内环境中支持高可扩展性的网络基础设施。传统的集中式架构需要在其中央服务器中维护整个建筑物或建筑群的地理地图，这可能导致低可扩展性和交通拥堵。本文提出了一种自组织且完全分布式的室内移动资产管理（MAM）平台，并基于所提出的分布式平台实时提出了一种针对多个被跟踪对象（如移动资产）和跟踪器的架构。为了验证所建议的平台，在实际测试平台中评估了根据并发查找数量增加的可扩展性性能。还评估了所提出的跟踪架构中的跟踪延迟和流量负载率。
