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An SDN/NFV Based Framework for Management and Deployment of Service Based 5G Core Network 被引量:23
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作者 Lu Ma Xiangming Wen +2 位作者 Luhan Wang Zhaoming Lu Raymond Knopp 《China Communications》 SCIE CSCD 2018年第10期86-98,共13页
The traffic explosion and the rising of diverse requirements lead to many challenges for traditional mobile network architecture on flexibility, scalability, and deployability. To meet new requirements in the 5 G era,... The traffic explosion and the rising of diverse requirements lead to many challenges for traditional mobile network architecture on flexibility, scalability, and deployability. To meet new requirements in the 5 G era, service based architecture is introduced into mobile networks. The monolithic network elements(e.g., MME, PGW, etc.) are split into smaller network functions to provide customized services. However, the management and deployment of network functions in service based 5 G core network are still big challenges. In this paper, we propose a novel management architecture for 5 G service based core network based on NFV and SDN. Combined with SDN, NFV and edge computing, the proposed framework can provide distributed and on-demand deployment of network functions, service guaranteed network slicing, flexible orchestration of network functions and optimal workload allocation. Simulations are conducted to show that the proposed framework and algorithm are effective in terms of reducing network operating cost. 展开更多
关键词 service based architecture 5G core network SDN NFV workload allocation
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A New Service Based on CDMA Short Message System-Roaming Advertisement
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作者 Shen Guoqiang (ZTE Corporation,Shenzhen 518057,China) 《ZTE Communications》 2003年第1期8-10,共3页
Through the comparison of the features of GSM and CDMA short message services,the paper shows that the CDMA short message center has stronger service capability and provides more value- added services.
关键词 CDMA as from ISP ICP it HLR A New service based on CDMA Short Message System-Roaming Advertisement on
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Location Based Services Acceptance and Adoption Evaluation: An Investigation on Mobile Phone Users’ Response to Awareness and Utilization of LBS Technology in Nairobi Kenya 被引量:1
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作者 Charles Busera Wasomi Edward Hunja Waithaka +1 位作者 Moses Karoki Gachari David Ndegwa Kuria 《Journal of Computer and Communications》 2021年第10期60-96,共37页
Location Based Navigation System (LBNS) is a specific Location Based Service (LBS) purely for navigational purpose. These systems resolve position of a user by using GNSS/GPS positioning technologies, to which supplem... Location Based Navigation System (LBNS) is a specific Location Based Service (LBS) purely for navigational purpose. These systems resolve position of a user by using GNSS/GPS positioning technologies, to which supplementary information on goods and services are tagged. The navigation services have become popular and can be installed on mobile phones to provide route information, location of points of interest and user’s current location. LBS has continued to face challenges which include “communication” process towards user reference. Location Based Service System conveys suitable information through a mobile device for effective decision making and reaction within a given time span. This research was geared at understanding the state of LBS technology acceptance and adoption by users in Nairobi Kenya. To do this a quantitative study was carried out through a questionnaire, to investigate mobile phone users’ response on awareness and use of LBS technology. Testing the growth of this technology in this region compared to predictions in previous studies using Technology Acceptance Model (TAM), it is evident that many users may be aware of GPS functionality in mobile phones but are certainly yet to fully embrace the technology as they rarely use it. This points to some underlying challenges towards this technology within this part of the World, thereby recommending for deliberate monitoring and evaluation of LBS technology for sustenance growth based on user satisfaction and acceptance for improved usability. 展开更多
关键词 Location based services (LBS) SMARTPHONE Mobile Device Mobile Phone Location based Navigation service (LBNS) Technology Acceptance Model Quantitative Analysis
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Smart Prediction for Seamless Mobility in F-HMIPv6 Based on Location Based Services
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作者 rawya rizk heba nashaat 《China Communications》 SCIE CSCD 2018年第4期192-209,共18页
This paper proposed a new scheme for smooth handoff over F-HMIPv6 networks based on Location Based Services(LBS). It uses the available information about mobile node(MN) such as user mobility patterns and MN's vel... This paper proposed a new scheme for smooth handoff over F-HMIPv6 networks based on Location Based Services(LBS). It uses the available information about mobile node(MN) such as user mobility patterns and MN's velocity to reduce handoff latency. In the proposed scheme, the movement pattern of users plays an important role in the performance analysis. The proposed scheme develops LBS that records a number of mobility patterns based on user daily behavior, and exploits these information to reduce the handoff latency. The proposed scheme is analyzed and compared with F-HMIPv6 protocol. The results show that it improves the performance in terms of handoff latency, packet delivery cost, and location update cost. Specifically, the proposed scheme achieves the tradeoff between realizing a smooth handoff and minimizing the cost that is the demand for all customers of mobile services. 展开更多
关键词 Cost functions F-HMIPV6 loca-tion based services macro handoff mobilitymanagement mobility prediction.
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Changes and Development of Home and Community Based Elderly Care Service Policies in China
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作者 Wu Li 《学术界》 CSSCI 北大核心 2020年第8期226-233,共8页
This paper analyzes the current situation of the development of home and community based elderly care service in China,points out the existing problems,and puts forward improvement measures,aiming to deepen the unders... This paper analyzes the current situation of the development of home and community based elderly care service in China,points out the existing problems,and puts forward improvement measures,aiming to deepen the understanding of HCBS and promote the theoretical research and practice of community home-based elderly care service. 展开更多
关键词 home and community based elderly care service policy change DEVELOPMENT
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Location Based Navigation Service Technology: Development of an Optimization Algorithm for Multivariate Contextual Cartographic Content in Location Based Navigation Service
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作者 Charles Busera Wasomi Edward Hunja Waithaka +1 位作者 Moses Karoki Gachari David Ndegwa Kuria 《Journal of Computer and Communications》 2022年第1期57-90,共34页
User response or reaction to navigation applications is influenced by relevance in geographic information, in terms of cartographic context and content delivered within a definite time, providing a direct impact to ou... User response or reaction to navigation applications is influenced by relevance in geographic information, in terms of cartographic context and content delivered within a definite time, providing a direct impact to outcome or consequence based on decision making and hence user reaction. Location Based Navigation Services (LBNS) have continuously advanced in cartographic visualization, making maps interpretation easy and ubiquitous to any user, as compared to pre-historic times when maps were a preserve of a few. Despite rapid growth in LBNS, there exist challenges that may be characterized as technical and non-technical challenges, among them being process of conveying geospatial information to user. LBNS system deliver appropriate information to a user through smartphone (mobile device) for effective decision making and response within a given time span. This research focuses on optimization of cartographic content for contextual information in LBNS to users, based on prevailing circumstances of various components that constitute it. The research looks into Geographic Information Retrieval (GIR), as a technical challenge centered on a non-technical issue of social being of user satisfaction, leading to decision making in LBNS, hence response and outcome. Though advanced technologically, current LBNS on information sourcing depends on user manual web pages navigation and maneuver, this can be painstaking and time consuming that it may cause unnecessary delay in information delivery, resulting to delayed information response time (DIRT). This in turn may lead to unappropriate decision making with erroneous reaction or response being taken, resulting in loss of opportunity, resources, time and even life. Optimization in LBNS is achieved by a mathematical relationship developed between user status, mobile device variables against cartographic content. The relationship is in turn applied in LBNS android application to fulfill optimization solution for user consumption. 展开更多
关键词 Location based services (LBS) SMARTPHONE Mobile Device Mobile Phone Location based Navigation service (LBNS) Kenya Cartographic Content Cartographic Visualization Cartographic Contextual Content Cartographic Optimization Optimization Algorithm
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A Service Discovery Approach Based on a Quantitative Similarity Measure for M-Tourism Platforms
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作者 Faycal M’hamed Bouyakoub Abdelkader Belkhir 《Communications and Network》 2012年第3期227-239,共13页
This paper presents a localization architecture for an m-tourism services delivery platform. The aim of the system is to deliver services for nomads (e-tourists) according to their localization and according to the re... This paper presents a localization architecture for an m-tourism services delivery platform. The aim of the system is to deliver services for nomads (e-tourists) according to their localization and according to the results given by the search engine. This engine is based on a quantitative similarity measure. The discovered services are presented via a Web Map Service. Moreover, the platform integrates an adaptation sub-system for heterogeneous environments and an e-negotiation module. 展开更多
关键词 Mobile Location services Location based services services Discovery Similarity Measure M-Tourism
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Factors influencing user adoption of location based service:From the expanded TAM perspective
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作者 Yuan HU Changping HU Jin HU 《Chinese Journal of Library and Information Science》 2014年第2期15-30,共16页
Purpose:This study intends to examine the factors influencing user adoption of location based service(LBS).Design/methodology/approach:This paper develops the research model for user adoption of LBS with the technolog... Purpose:This study intends to examine the factors influencing user adoption of location based service(LBS).Design/methodology/approach:This paper develops the research model for user adoption of LBS with the technology acceptance model(TAM) as the theoretical foundation.Using a questionnaire and sampling method,empirical data was collected from 386 participants.Structured equation modeling was used to test the validity of the proposed model.Findings:The results show that I) perceived ease of use.perceived usefulness and perceived playfulness were direct determinants of behavioral intention,and perceived ease of use has the greatest impact of the three;2) emergency,ubiquity,technology maturity and social trust all have positive and significant impacts on perceived ease of use;3) emergency and social trust significantly influence perceived usefulness positively:4) individualization and social impact significantly affect perceived playfulness positively.Research limitations:Subjects were from China’s mainland,which limits the generalizability of the research findings.The interaction effects of age,gender and user experience were not included.Practical implications:This study offers LBS operators,marketers and application developers insights into the way to attract more users by increasing perceived usefulness,ease of use and playfulness of LBS.Originality/value:Location based service is still a relatively new concept and there were few theoretical and empirical studies that examine user adoption of the serv ice.This study contributes to existing LBS adoption studies by modifying and extending TAM and meanwhile the empirical study will help the research community gain a deeper understanding of the factors affecting user adoption of LBS. 展开更多
关键词 Location based service(LBS) User adoption Structured equation modeling(SEM) Empirical study
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Ontology Engineering and Knowledge Services for Agriculture Domain 被引量:12
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作者 Asanee Kawtrakul 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2012年第5期741-751,共11页
This paper presents a knowledge service system for the domain of agriculture. Three key issues for providing knowledge services are how to improve the access of unstructured and scattered information for the non-speci... This paper presents a knowledge service system for the domain of agriculture. Three key issues for providing knowledge services are how to improve the access of unstructured and scattered information for the non-specialist users, how to provide adequate information to knowledge workers and how to provide the information requiring highly focused and related information. Cyber-Brain has been designed as a platform that combines approaches based on knowledge engineering and language engineering to gather knowledge from various sources and to provide the effective knowledge service. Based on specially designed ontology for practical service scenarios, it can aggregate knowledge from Internet, digital archives, expert, and other resources for providing one-stop-shop knowledge services. The domain specific and task oriented ontology also enables advanced search and allows the system ensures that knowledge service could improve the user benefit. Users are presented with the necessary information closely related to their information need and thus of potential high interest. This paper presents several service scenarios for different end-users and reviews ontology engineering and its life cycle for supporting AOS (Agricultural Ontology Services) Vocbench which is the heart of knowledge services in agriculture domain. 展开更多
关键词 knowledge service ontology construction ontology design ontology maintenance natural languageprocessing ontology based knowledge services
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Smart phone-based context-aware augmentative and alternative communications system
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作者 PARK DongGyu SONG Sejun LEE DoHoon 《Journal of Central South University》 SCIE EI CAS 2014年第9期3551-3558,共8页
A smartphone-based context-aware augmentative and alternative communication(AAC) was applied was in order to enhance the user's experience by providing simple, adaptive, and intuitive interfaces. Various potential... A smartphone-based context-aware augmentative and alternative communication(AAC) was applied was in order to enhance the user's experience by providing simple, adaptive, and intuitive interfaces. Various potential context-aware technologies and AAC usage scenarios were studied, and an efficient communication system was developed by combining smartphone's multimedia functions and its optimized sensor technologies. The experimental results show that context-awareness accuracy is achieved up to 97%. 展开更多
关键词 augmentative alternative communication system context awareness mobile system location based services
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Continuously Performing the Consultation and Social Service Roles of Human Rights Bases
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作者 HAN DAYUAN 《The Journal of Human Rights》 2014年第5期13-14,共2页
The Ministry of Education and the State Council Information Office have named Renmin University of China as one of the human rights national education and training bases. This shows the full affirmation and trust in t... The Ministry of Education and the State Council Information Office have named Renmin University of China as one of the human rights national education and training bases. This shows the full affirmation and trust in the university's education, research and training work and also represents encouragement for its future work. 展开更多
关键词 Office WILL Continuously Performing the Consultation and Social service Roles of Human Rights Bases
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Combination of light-emitting diode positioning identification and time-division multiplexing scheme for indoor location-based service 被引量:3
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作者 刘翔 杨爱英 +1 位作者 王雨 冯立辉 《Chinese Optics Letters》 SCIE EI CAS CSCD 2015年第12期12-17,共6页
A combination of light-emitting diode(LED) identification and a time-division multiplexing scheme is proposed in this Letter for indoor location-based service. With the scheme, the arrangement of white LED lamps and... A combination of light-emitting diode(LED) identification and a time-division multiplexing scheme is proposed in this Letter for indoor location-based service. With the scheme, the arrangement of white LED lamps and the structure of a data frame are designed to realize high-accuracy indoor positioning and location-based payload data transmission simultaneously. The results of the experiment demonstrate that the indoor positioning accuracy is 10 cm and 2 Mb/s data transmission with high signal quality is realized. 展开更多
关键词 Data communication systems Data transfer Indoor positioning systems LOCATION Location based services MULTIPLEXING Telecommunication services Time division multiplexing
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Toward Seamless Indoor-Outdoor Applications:Developing Stakeholder-Oriented Location-Based Services 被引量:2
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作者 Kohei OGAWA Edward VERBREE +2 位作者 Sisi ZLATANOVA Naohiko KOHTAKE Yoshiaki OHKAMI 《Geo-Spatial Information Science》 2011年第2期109-118,共10页
Location-Based Services (LBS),an emerging new business based on smartphone and mobile networks,are becoming more and more popular.Most of these LBSs,however,only offer non-seamless indoor/outdoor applications and simp... Location-Based Services (LBS),an emerging new business based on smartphone and mobile networks,are becoming more and more popular.Most of these LBSs,however,only offer non-seamless indoor/outdoor applications and simple applications without giving stakeholders the chance to play an active role.Our specific aim is to solve these issues.This paper presents concepts to solve these issues by expanding the Open Location Services Interface Standard (OpenLS) to allow seamless indoor/outdoor positioning and to extend the content of the services to include information recommended by stakeholders. 展开更多
关键词 location based services OpenLS STAKEHOLDER SEAMLESS INDOOR OUTDOOR APPLICATIONS standardized IMES
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“互联网+”背景下导学互动与BOPPPS模式在《LBS技术与应用》课程中的教学探索
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作者 宋佳 王靖 +2 位作者 李鹏 王延霞 王梦柯 《中国科技期刊数据库 科研》 2022年第9期147-149,共3页
全球卫星导航定位系统逐步成为一个全球性的新兴高新技术产业,LBS技术将充分发挥全球卫星导航定位系统的相关功能,在此基础上提供丰富的服务。如何开展LBS技术的学习,并将理论落实到实际需要深入探究。本文提出“互联网+”的大背景下将... 全球卫星导航定位系统逐步成为一个全球性的新兴高新技术产业,LBS技术将充分发挥全球卫星导航定位系统的相关功能,在此基础上提供丰富的服务。如何开展LBS技术的学习,并将理论落实到实际需要深入探究。本文提出“互联网+”的大背景下将导学互动与BOPPPS模式相结合,可以克服现有《LBS技术与应用》新课程教学面临的问题,对教学质量的提高以及相关专业的建设具有重要的意义,同时对全球卫星导航系统的运用提供新的思路。 展开更多
关键词 基于位置服务 (Location based services LBS) 互联网+ 导学互动 BOPPPS
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Detection and Location of Objects from Mobile Mapping System Integrated with CCD Cameras
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作者 Jinsuk Kang 《Journal of Electronic Science and Technology》 CAS 2012年第2期102-106,共5页
During the last decade, spatio-temporal databases have become increasingly important in many applications such as geographic information systems (GIS) and engineering information systems. This paper discusses the de... During the last decade, spatio-temporal databases have become increasingly important in many applications such as geographic information systems (GIS) and engineering information systems. This paper discusses the design and implementation of a geocomputing platform for the development of location-based services (LBS) focusing on mobile mapping. During the analysis, design, and implementation of the geocomputing platform, an effective method is proposed for the real-time processing of geographic information acquired by a camera attached to a personal digital assistant (PDA). This method combines location information given by the global position system (GPS) with man's ability to recognize the location of objects and their geographical relationship to improve object mapping. 展开更多
关键词 Geocomputing platform location- based services personal digital assistant.
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Hierarchy Bayesian model based services awareness of high-speed optical access networks
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作者 白晖峰 《Optoelectronics Letters》 EI 2018年第2期114-118,共5页
As the speed of optical access networks soars with ever increasing multiple services, the service-supporting ability of optical access networks suffers greatly from the shortage of service awareness. Aiming to solve t... As the speed of optical access networks soars with ever increasing multiple services, the service-supporting ability of optical access networks suffers greatly from the shortage of service awareness. Aiming to solve this problem, a hierarchy Bayesian model based services awareness mechanism is proposed for high-speed optical access networks. This approach builds a so-called hierarchy Bayesian model, according to the structure of typical optical access networks. Moreover, the proposed scheme is able to conduct simple services awareness operation in each optical network unit(ONU) and to perform complex services awareness from the whole view of system in optical line terminal(OLT). Simulation results show that the proposed scheme is able to achieve better quality of services(Qo S), in terms of packet loss rate and time delay. 展开更多
关键词 As Simulation OLT Hierarchy Bayesian model based services awareness of high-speed optical access networks
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From institutional merger integration to institutional strategic transformation:A case study of the strategic management paradigm at Shanghai Library
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作者 CHEN Chao 《Chinese Journal of Library and Information Science》 2010年第3期1-18,共18页
This article attempts to apply the strategic management theory to the subsequent shaping up of a readjusted strategic development policy for Shanghai Library after its merger with the Institute of Scientific and Techn... This article attempts to apply the strategic management theory to the subsequent shaping up of a readjusted strategic development policy for Shanghai Library after its merger with the Institute of Scientific and Technological Information of Shanghai(ISTIS)in 1995.It also tries to analyze and explicate such an empirical implementation of institutional reintegration process through strategic management at Shanghai Metropolitan Library.By doing so,it aims to present an objective case study of activities based on the strategic management paradigm at a major Chinese metropolitan public library. 展开更多
关键词 Strategic management One-stop information service delivery(based on both custom-tailored traditional and digital library resources support) Public libraries Research libraries Shanghai Library Institute of Scientific and Technological Information of Shanghai
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Protecting personalized privacy against sensitivity homogeneity attacks over road networks in mobile services 被引量:5
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作者 Xiao PAN Weizhang CHEN +2 位作者 Lei WU Chunhui PIAO Zhaojun HU 《Frontiers of Computer Science》 SCIE EI CSCD 2016年第2期370-386,共17页
Privacy preservation has recently received considerable attention for location-based mobile services. A lot of location cloaking approaches focus on identity and location protection, but few algorithms pay attention t... Privacy preservation has recently received considerable attention for location-based mobile services. A lot of location cloaking approaches focus on identity and location protection, but few algorithms pay attention to prevent sensitive information disclosure using query semantics. In terms of personalized privacy requirements, all queries in a cloaking set, from some user's point of view, are sensitive. These users regard the privacy is breached. This attack is called as the sensitivity homogeneity attack. We show that none of the existing location cloaking approaches can effectively resolve this problem over road networks. We propose a (K, L, P)-anonymity model and a personalized privacy protection cloaking algorithm over road networks, aiming at protecting the identity, location and sensitive information for each user. The main idea of our method is first to partition users into different groups as anonymity requirements. Then, unsafe groups are adjusted by inserting relaxed conservative users considering sensitivity requirements. Finally, segments covered by each group are published to protect location information. The efficiency and effectiveness of the method are validated by a series of carefully designed experiments. The experimental results also show that the price paid for defending against sensitivity homogeneity attacks is small. 展开更多
关键词 query semantics sensitive information privacy protection road networks location based services
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An internet of things assisted drone based approach to reduce rapid spread of COVID-19
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作者 Mohit Angurala Manju Bala +2 位作者 Sukhvinder Singh Bamber Rajbir Kaur Prabhdeep Singh 《Journal of Safety Science and Resilience》 2020年第1期31-35,共5页
With the quick spread of pandemic disease,many individuals have lost their lives across different parts of the world.So,the need for a novel approach or model to overcome the problem becomes a necessity.In this paper,... With the quick spread of pandemic disease,many individuals have lost their lives across different parts of the world.So,the need for a novel approach or model to overcome the problem becomes a necessity.In this paper,a mechanism is proposed called DBCMS(Drone Based Covid-19 Medical Service)for the safety of medical em-ployees who are prone to Covid-19 infection.The proposed mechanism can effectively improve the treatment process of Covid-19 patients.Drones are nowadays commonly used in the field of medical emergency situations.The proposed model in this paper uses drone service to reduce the risk of infection to the doctors or other medical staff,thereby preventing the disease spread.This paper further assumes that the primary step is to isolate people at their home instead of admitting them to the hospitals,also called a situation of lockdown or curfew.Thus,in this way,the spread can be significantly reduced across the globe if DBCMS approach is implemented at cluster level. 展开更多
关键词 Drone based medical service GPS based Tracking IOT
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An efficient method for privacy preserving location queries 被引量:5
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作者 Yubao LIU Xiuwei CHEN +2 位作者 Zhan LI Zhijie LI Raymond Chi-Wing WONG 《Frontiers of Computer Science》 SCIE EI CSCD 2012年第4期409-420,共12页
Recently, the issue of privacy preserving loca- tion queries has attracted much research. However, there are few works focusing on the tradeoff between location privacy preservation and location query information coll... Recently, the issue of privacy preserving loca- tion queries has attracted much research. However, there are few works focusing on the tradeoff between location privacy preservation and location query information collection. To tackle this kind of tradeoff, we propose the privacy persevering location query (PLQ), an efficient privacy pre-serving location query processing framework. This frame- work can enable the location-based query without revealing user location information. The framework can also facilitate location-based service providers to collect some information about the location based query, which is useful in practice. PLQ consists of three key components, namely, the location anonymizer at the client side, the privacy query processor at the server side, and an additional trusted third party connect- ing the client and server. The location anonymizer blurs the user location into a cloaked area based on a map-hierarchy. The map-hierarchy contains accurate regions that are parti- tioned according to real landforms. The privacy query pro- cessor deals with the requested nearest-neighbor (NN) loca- tion based query. A new convex hull of polygon (CHP) algo- rithm is proposed for nearest-neighbor queries using a poly- gon cloaked area. The experimental results show that our al- gorithms can efficiently process location based queries. 展开更多
关键词 location based service (LBS) privacy preserva- tion nearest-neighbor (NN) location query
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