• Title, Summary, Keyword: BLE

Search Result 237, Processing Time 0.043 seconds

An Android BLE Emulator for Developing Wearable Apps (웨어러블 어플리케이션 개발을 위한 안드로이드 BLE 에뮬레이터)

  • Moon, Hyeonah;Park, Sooyong;Choi, Kwanghoon
    • KIISE Transactions on Computing Practices
    • /
    • v.24 no.2
    • /
    • pp.67-76
    • /
    • 2018
  • BLE (Bluetooth Low Energy) has been extensively used for communication between mobile applications and wearable devices in IoT (Internet of Things). In developing Android applications, wearable devices, on which the applications can run, should be available because the existing Android SDK does not support any BLE emulation facility. In this study, we have designed and implemented the first Android BLE emulator. Using this, we are able to develop and test BLE-based Android applications even when without wearable devices. We have also proposed an automatic generation method of Android BLE scenarios based on graph model. We have shown that the method is useful for systematically testing BLE application protocols by running the generated scenarios on the Android BLE emulator.

Electronic Attendance-Absence Recording System using BLE Advertising Function of Smartphone (스마트폰의 BLE 광고 기능을 이용한 전자출결 시스템)

  • Lee, Jun-Hyuk
    • Journal of the Korea Convergence Society
    • /
    • v.8 no.1
    • /
    • pp.7-12
    • /
    • 2017
  • In this paper, we proposed an electronic attendance-absence recording system using a smartphone that does not require separate BLE(Bluetooth Low Energy) devices and infrastructure by using BLE advertisement technology of smartphone. The existing BLE-based electronic attendance-absence recording system requires a BEL device to be attached to each classroom for services and a separate technology to identify the devices attached to the classroom. Also, due to the interference with each other, sometimes an error occurred in the electronic connection. In this paper, we propose a system to solve the problems about time, place and cost, which is a disadvantage of the conventional Bluetooth beacon system. BLE advertising function of the smartphone that the user is using without BLE device, it is possible to construct infrastructure for electronic attendance-absence recording system. In order to evaluate the effectiveness of the proposed system, we designed the system structure and operation flow and constructed the system using the smart phone in actual used.

An Analysis of Packet Collision Probability due to Inter-piconet Interference in the Bluetooth Low Energy Networks (저전력 블루투스 네트워크에서 피코넷 간 간섭으로 인한 패킷충돌 확률 분석)

  • Kim, Myoung Jin
    • Journal of the Institute of Electronics and Information Engineers
    • /
    • v.54 no.8
    • /
    • pp.3-11
    • /
    • 2017
  • Research and development are being conducted to apply low-power Bluetooth (BLE) technology to IoT (Internet of Things) applications. The characteristic of this application environment is that many piconets can operate in the same space. Therefore, interference between homogeneous networks is likely to occur. In the BLE data channel, adaptive frequency hopping (AFH) scheme is used among the 37 frequency channels, and the master and the slave communicate while changing the carrier frequency. If there are multiple BLE piconets in the same space, there is a risk of frequency collision and packet errors will occur. In this paper, we analyze the packet collision probability due to cochannel interference in multiple asynchronous BLE piconet environments. Specifically, we analyzed packet collision probability according to the number of concurrently operating BLE piconets with the ratio of connection interval to connection event length as the main parameters. The analysis result can be used to set connection event related parameters for a desired packet collision probability according to the number of users having BLE devices in a given space.

DDS-Based BLE Adaptor for Standard Profile Data Interoperation in Internet of Things (사물인터넷 환경에서 표준 Profile 데이터 상호운용을 위한 DDS 기반 BLE 어댑터)

  • Oh, Jung-Hoon;Back, Moon-Ki;Oh, Gil-Tak;Lee, Kyu-Chul
    • KIPS Transactions on Computer and Communication Systems
    • /
    • v.5 no.11
    • /
    • pp.403-410
    • /
    • 2016
  • IoT(Internet of Things) has purpose for providing new kind of service though interaction with everything. With development of IoT, computer model which is based on internet is changed to distributed connection model between heterogeneous things. There is a problem that it is impossible to connect between each other different protocols. To solve this problem, we should abstract each of things of data through using adaptor of middleware structure in order to make consistent data unit. In this paper, we propose BLE(Bluetooth Low Energy) adaptor, which is interaction with things, based on DDS(Data Distribution Service) that is real-time standard middleware. It is possible to data interaction between BLE Devices as well as two-way data interaction with different protocol devices. Also existing BLE Devices and study have a problem that Data exchange without using a standard data format of a profile defined by the Bluetooth SIG. Using the data formats defined independently by a problem that should not exchange data according to the type and manufacturer of the device BLE. The BLE adapter to solve this problem, the classification and analysis of the 12 stand profile was applied to create a profile based on the standard data format. It is possible to get wide interoperability of not affected on the BLE devices type and manufacturer of the device because it is applied a profile that standard data format.

An Analysis on the Number of Advertisements for Device Discovery in the Bluetooth Low Energy Network (저전력 블루투스 네트워크에서 장치 탐색을 위한 Advertising 횟수에 관한 분석)

  • Kim, Myoung Jin
    • Journal of the Institute of Electronics and Information Engineers
    • /
    • v.53 no.8
    • /
    • pp.3-12
    • /
    • 2016
  • Bluetooth Low Energy (BLE) protocol has attracted attention as a promising technology for low data throughput and low energy wireless sensor networks. Fast device discovery is very important in a BLE based wireless network. It is necessary to configure the network to work with minimized energy consumption because the BLE network nodes are expected to operate a long time typically on a coin cell battery. However, since it is difficult to obtain low energy and low latency at the same time, the BLE standard introduces wide range setting of parameters related to device discovery process and let the network operators to set up parameter values for the application. Therefore, it is necessary to analyze the performance of device discovery according to the related parameter values prior to BLE network operation. In this paper we analyze the expected value and the cumulative distribution function of the number of advertisements for device discovery in the BLE network. In addition, we propose a scheme for controlling the interval between advertising events that can improve the performance of device discovery without increasing energy consumption.

Study on the Design Method of the Energy Harvesting Smart Sensor for Implementing IoT Service (IoT 서비스 구현을 위한 에너지 하베스팅 Smart Sensor 설계 방안 연구)

  • Jang, Ho-Deok
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
    • /
    • v.11 no.1
    • /
    • pp.89-94
    • /
    • 2018
  • This paper investigated the design method of the smart sensor for implementing IoT (Internet of Things) service. The power supply of sensor consistently acquisting data is based on the energy harvesting technology and designed with piezoelectric transducer not affected by surrounding circumstances. The wireless communication interface for the transmission of data is designed with BLE (Bluetooth Low Energy). BLE is highly adequate wireless communication technology for low power consumption and short distance wireless communication. The main application of BLE is beacon whose usage range is extended from O2O (Online to Offline) service, navigator based on indoor positioning technology, and anti-theft/lost child prevention service to mobile game. This paper studied the method to extend wireless coverage for complementing the short wireless transmission distance of BLE. The wireless sensor network based on CATV network is proposed for the easy construction of BLE sensor network and extended wireless coverage.

Precise Indoor Positioning Algorithm for Energy Efficiency Based on BLE Fingerprinting (에너지 효율을 고려한 BLE 핑거프린팅 기반의 정밀 실내 측위 알고리즘)

  • Lee, Dohee;Lee, Jaeho
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.41 no.10
    • /
    • pp.1197-1209
    • /
    • 2016
  • As Indoor Positioning System demands due to increased penetration and utilization of smart device, Indoor Positioning System using Wi-Fi or BLE(Bluetooth Low Energy) beacon takes center stage. In this paper, a terminal location of the user is calculated through Microscopic Trilateration using RSSI based on BLE. In the next step, a fingerprinting map appling approximate value of Microscopic Trilateration increases an efficiency of computation amount and energy for Indoor Positioning System. I suggest Indoor Positioning Algorithm based on BLE fingerprinting considering efficiency of energy by conducting precise Trilateration that assure user's terminal position by using AP(Access Point) surrounding targeted fingerprinting cells. And This paper shows experiment and result based on An Suggesting Algorithm in comparison with a fingerprinting based on BLE and Wi-Fi that be used for Indoor Positioning System.

Study on Design Method of Energy Harvesting System for BLE Beacon (BLE 비콘을 위한 에너지 하베스팅 시스템 설계 방안 연구)

  • Jang, Ho-deok
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.42 no.1
    • /
    • pp.149-152
    • /
    • 2017
  • This paper investigated the method for the output of power management IC (PMIC) for BLE beacon with energy harvesting device to be maintained constantly. The capacitor was used to store the energy supplied from energy harvesting device such as solar module and the capacitance was estimated to the optimum value according to the interval for the BLE beacon to send advertising signal.

Application of Navigating System based on Bluetooth Smart (블루투스 스마트 기반의 내비게이팅 시스템)

  • Lee, YoungDoo;Jan, Sana Ullah;Koo, Insoo
    • The Journal of The Institute of Internet, Broadcasting and Communication
    • /
    • v.17 no.1
    • /
    • pp.69-76
    • /
    • 2017
  • Bluetooth Low Energy (BLE), also known as Bluetooth Smart, has ultra-low power consumption; in fact, BLE-enabled devices can run on a single coin cell battery for several years. In addition, BLE can estimate the approximate distance between two devices using the Received Signal Strength Indication (RSSI) feature, enabling relatively precise navigation in indoor and small outdoor areas where GPS is not an option. In this paper, an experimental setup is presented in which BLE is used for navigation within a small outdoor area. BLE-based beacons are installed in fixed positions, which periodically transmit a universally unique identifier (UUID). A smart device receives the UUID and sends it to a database server using cellular or Wi-Fi technology. The server returns fixed position information corresponding to the received UUID codes, and the smart device uses that information to compute its current position based on relative signal strengths, and display it on a map. These results demonstrate the successful application of BLE technology for navigation in small outdoor areas. This system can be implemented for indoor navigation as well.

Site Monitoring of Crews and Passengers on Board by the BLE and PLM Combination (BLE와 PLM 조합의 승선자 위치 모니터링)

  • Kwon, Hyuk-Joo;Yang, Hyun-Suk;Lee, Sung-Geun
    • Journal of the Korean Society of Marine Engineering
    • /
    • v.39 no.4
    • /
    • pp.463-467
    • /
    • 2015
  • When unforeseen accidents occur in a ship, it is important to save passengers safely and remove them from the accident area quickly. To solve such a situation, site information of passengers on board always must be identified. This paper implemented a site monitoring of crews and passengers based on the BLE and PLM combination, to prepare for unexpected accidents of the ships. This system was composed of BLE tag for crews, passengers and each room, PLM networks, data server, and monitoring PC. In this system, site information derived from the tag attached to the bodies and cabins of crews and passengers are transmitted through a power line network, and monitored on the screen of a monitoring PC. The proposed system guides them into the only authorized area considering the ship security and passengers' safety, and even has a special alarm call to warn them after entering an unauthorized area. This system enables the BLE-embedded tag battery to use for a long time because the BLE consumes low electric power, and can gain an economic advantage.