• Title/Summary/Keyword: Location Management

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A Tracking System Using Location Prediction and Dynamic Threshold for Minimizing SMS Delivery

  • Lai, Yuan-Cheng;Lin, Jian-Wei;Yeh, Yi-Hsuan;Lai, Ching-Neng;Weng, Hui-Chuan
    • Journal of Communications and Networks
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    • v.15 no.1
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    • pp.54-60
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    • 2013
  • In this paper, a novel method called location-based delivery (LBD), which combines the short message service (SMS) and global position system (GPS), is proposed, and further, a realistic system for tracking a target's movement is developed. LBD reduces the number of short message transmissions while maintaining the location tracking accuracy within the acceptable range. The proposed approach, LBD, consists of three primary features: Short message format, location prediction, and dynamic threshold. The defined short message format is proprietary. Location prediction is performed by using the current location, moving speed, and bearing of the target to predict its next location. When the distance between the predicted location and the actual location exceeds a certain threshold, the target transmits a short message to the tracker to update its current location. The threshold is dynamically adjusted to maintain the location tracking accuracy and the number of short messages on the basis of the moving speed of the target. The experimental results show that LBD, indeed, outperforms other methods because it satisfactorily maintains the location tracking accuracy with relatively fewer messages.

Design of A Moving Object Management System for Tracking Vehicle Location (차량 위치 추적을 위한 이동 객체 관리 시스템의 설계)

  • Ahn, Yoon-Ae;Kim, Dong-Ho;Ryu, Keun-Ho
    • The KIPS Transactions:PartD
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    • v.9D no.5
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    • pp.827-836
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    • 2002
  • Moving object management systems manage spatiotemporal data, which change their location over tine such as people, animals, and cars. These moving object management systems can be applied to vehicle location tracking, digital battlefield, location-based service, and so on. The existing moving object management systems only manage past or future location of the moving objects separately. Therefore, they cannot suggest estimation method of uncertain past or future location of the moving objects. In this paper, we propose a moving object management system, which not only manages historical data of the moving objects, but also predicts past and future location of the moving objects using historical data stored in database. We define the moving objects for vehicle location tracking and propose a moving object database structure. Finally, we suggest an execution model of the proposed system and apply the execution model to a virtual scenario for vehicle tracking.

Predictive Location Management Strategy Using Two Directional Consecutive LAs in a Cellular Network (이동 통신망에서 방향성을 지닌 2개의 연속적 위치영역을 이용한 예측 위치 관리 전략)

  • Chang, I.K.;Hong, J.S.;Kim, J.P.;Lie, C.H.
    • Journal of the Korean Operations Research and Management Science Society
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    • v.33 no.3
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    • pp.43-58
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    • 2008
  • In this paper, we have presented a dynamic, predictive location update scheme that takes into account each user's mobility patterns. A user's past movement history is used to create two-dimensional transition probability matrix which makes use of two directional consecutive location areas. A mobile terminal utilizes the transition probability to develop a predictive path which consists of several predictive nodes and then the location update is saved as long as a mobile user follows the predictive path. Using continuous-time Markov chain, cost functions of location update and paging are derived and it is shown that the number of predictive nodes can be determined optimally. To evaluate the proposed scheme, simulations are designed and the numerical analysis is carried out. The numerical analysis features user's mobility patterns and regularity, call arrival rates, and cost ratio of location update to paging. Results show that the proposed scheme gives lower total location management cost, compared to the other location update schemes.

Location Management using LA-Division Scheme in Personal Communication Systems (이동통신망에서 영역분할 방식의 위치관리 기법)

  • Park, N.Y.;Chang, I.K.;Hong, J.W.;Lie, C.H.
    • IE interfaces
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    • v.16 no.4
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    • pp.507-514
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    • 2003
  • In personal communication systems location management of mobile terminals is required to connect incoming calls to the mobile terminals. Investigation of effective location update and paging strategies is important to reduce the cost of location management. In this study, we propose a paging strategy considering the mobile terminals' residence patterns. The first paging area is characterized by the set of cells in the location area where mobile terminals usually stay for a significant period of time. The rest of cells in the location area are included into the second paging area. To reduce the paging cost the first paging area is decided by reflecting various residence patterns of mobile terminals. For an incoming call, the sequential paging is performed in the order of the paging area. Thus the paging cost is greatly reduced, especially when the called mobile terminal is located in the first paging area. The proposed strategy is expected to be more effective than an existing strategy that uses the anchor cell in the location area.

Location Area List Generation for Profile Based Location Management in Cellular Networks (셀룰러 망에서 프로파일 기반 위치관리를 위한 위치영역 리스트 생성)

  • Cho, Hyunjoon
    • The Journal of Korean Association of Computer Education
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    • v.8 no.6
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    • pp.123-132
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    • 2005
  • There are many research results for the location update cost minimization of location management in cellular networks. For minimizing the location update cost, we have to take in consideration of each users' mobility pattern. This paper suggests location area list generation and a 3-step paging method based on users' movement history with the users' profiles. Users' mobility has not only geographical regular patterns but also time-related regularity. So, the method extracts users' movement regularities in both geography and time from their movement history, and generate location area list considering the regularities. For the performance analysis of the suggested method, we have executed a simulation for suggested method with user's mobility model. The results of the simulation show that suggested algorithm has some merits in the location management cost.

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Dynamic Location Management with Hierarchical Location Area (계층적 위치 지역을 이용한 동적 위치 관리 기법)

  • Lee, Chan-Oh;Kim, Myung-Il;Kim, Sung-Jo
    • Proceedings of the Korean Information Science Society Conference
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    • 2002.10e
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    • pp.661-663
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    • 2002
  • This paper introduces a dynamic location management with hierarchical location area, which helps in reducing location update(LU) and paging cost and hence total location management cost. Users are assigned to appropriate location area level utilizing the call-to-mobility ratio(CMR) value. CMR values are calculated each time a user enters a new cell by computing its mobility rate and incoming call rate, which are the two key factors for defining the size of the location area.

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Design and Implementation of Location Management System of Stock Keeping Unit with High Mobility Using Embedded System and Wireless LAN (임베디드 시스템과 무선 랜을 이용한 이동성이 높은 재고단위의 위치관리 시스템 설계 및 구현)

  • Lee, Jae-Hyun;Kwon, Kyung-Hee
    • The KIPS Transactions:PartA
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    • v.9A no.4
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    • pp.413-420
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    • 2002
  • It it essential to get the exact location information of products for a warehouse management. It is very hard, however, to know the location of products which change their location in warehouse frequently This causes the effective warehouse management to be almost impossible. In this paper, we suggest a new location management system for such a SKU(Stock Keeping Unit) with high mobility. The system is composed of RFID (Radio Frequency IDentification), a management terminal with wireless LAN, mobile devices (Cellular Phone & PDA), and a central management system. As a model of a SKU with high mobility, we selected a used-car stored in a large-scale warehouse. We designed and implanted used-car location management system. After analyzing the operations of each position in used-car warehouse where the system will run, we implemented each function. This research shows that an embedded system with wireless LAN is able to know the status of coming in and cut and location of a SKU with high mobility in warehouse very accurately in real time. Therefore, it makes the warehouse to be controlled systematically.

Location management using user mobility pattern in mobile IP and WCDMA network (Mobile IP 와 WCDMA 망에서의 사용자 이동 pattern 에 따른 location management)

  • Kim, Seo-Young;Kim, Jeong-Ho
    • Proceedings of the IEEK Conference
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    • 2005.11a
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    • pp.229-232
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    • 2005
  • Many kinds of communication systems will be co-existed in the next generation communication environment. Location management will be one of the most important strategies in the future communication network. Whether the user gets the service in any kind of communication system, it is required to know the location of the user properly and manages this location information efficiently. In this paper, mobile IP and WCDMA systems are considered as next generation communication systems. We improve the performance of communication in heterogeneous networks adjusting the conventional region-based location management strategy in homogeneous network. This strategy can be adjusted dynamically to the communication system on the basis of packet-to-mobility ratio (PMR) in mobile IP system or call-to-mobility ratio (CMR) in WCDMA system, lots of different system parameters, and movement pattern of the user. This can be also based on the performance analysis with considering signaling cost and database access cost.

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A Location Context Management Architecture of Mobile Objects for LBS Application

  • Ahn, Yoon-Ae
    • Journal of the Korean Data and Information Science Society
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    • v.18 no.4
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    • pp.1157-1170
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    • 2007
  • LBS must manage various context data and make the best use of this data for application service in ubiquitous environment. Conventional mobile object data management architecture did not consider process of context data. Therefore a new mobile data management framework is needed to process location context data. In this paper, we design a new context management framework for a location based application service. A suggestion framework is consisted of context collector, context manager, rule base, inference engine, and mobile object context database. It describes a form of rule base and a movement process of inference engine that are based on location based application scenario. It also presents an embodiment instance of interface which suggested framework is applied to location context interference of mobile object.

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Location Management Strategy Based on Working Set for Personal Communications Network (PCN 환경을 위한 Working Set 기반의 위치 관리 기법)

  • Im, Seong-Bin;Eom, Yeong-Ik
    • The Transactions of the Korea Information Processing Society
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    • v.7 no.4
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    • pp.1279-1289
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    • 2000
  • Recently, research activities for combining portable computer technology and wireless communication technology are in progress to realize mobile computing environment that designed to support mobile hosts in the existing network environments. For PCN environments, the location management strategies are particularly emphasized among various strategies necessary for the mobile computing environment. Location management strategy for PCN environment, which is mostly based on the IS-41 standards brings an issue that additional network traffics are generated to deliver updata messages to home location server whenever a mobile host changes its location server. In this paper, we propose an innovative updata strategy and a search strategy that resolves the problem shown in the IS-41 scheme for HLR/VLR structure of CDMA environments. Also, this paper presents the performance comparison of proposed scheme and scheme used in IS-41 obtained from a simulation. The simulation was conducted based on the number of messages, the rate of database accesses, and the number of hops visited when the location management scheme is executed.

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