Int. J. Handheld Comput. Res.最新文献_第9页

Client-Server Based LBS Architecture: A Novel Positioning Module for Improved Positioning Performance 基于客户端-服务器的LBS架构:一种提高定位性能的新型定位模块

Int. J. Handheld Comput. Res. Pub Date : 2010-07-01 DOI: 10.4018/jhcr.2010070101

M. Nabhan, S. A. Masri, V. Garaj, W. Balachandran, Z. Hunaiti

{"title":"Client-Server Based LBS Architecture: A Novel Positioning Module for Improved Positioning Performance","authors":"M. Nabhan, S. A. Masri, V. Garaj, W. Balachandran, Z. Hunaiti","doi":"10.4018/jhcr.2010070101","DOIUrl":"https://doi.org/10.4018/jhcr.2010070101","url":null,"abstract":"This work presents a new efficient positioning module that operates over client-server LBS architectures. The aim of the proposed module is to fulfil the position information requirements for LBS pedestrian applications by ensuring the availability of reliable, highly accurate and precise position solutions based on GPS single frequency L1 positioning service. The positioning module operates at both LBS architecture sides; the client mobile device, and the server positioning server. At the server side, the positioning module is responsible for correcting user's location information based on WADGPS corrections. In addition, at the mobile side, the positioning module is continually in charge for monitoring the integrity and available of the position solutions as well as managing the communication with the server. The integrity monitoring was based on EGNOS integrity methods. A prototype of the proposed module was developed and used in experimental trials to evaluate the efficiency of the module in terms of the achieved positioning performance. The positioning module was capable of achieving a horizontal accuracy of less than 2 meters with a 95% confidence level with integrity improvement of more than 30% from existing GPS/EGNOS services.","PeriodicalId":265963,"journal":{"name":"Int. J. Handheld Comput. Res.","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133490995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

On Balancing Energy Consumption, Rendering Speed, and Image Quality on Mobile Devices 在移动设备上平衡能耗、渲染速度和图像质量

Int. J. Handheld Comput. Res. Pub Date : 2010-07-01 DOI: 10.4018/jhcr.2010070104

Fan Wu, E. Agu, Clifford Lindsay, Chung-Han Chen

{"title":"On Balancing Energy Consumption, Rendering Speed, and Image Quality on Mobile Devices","authors":"Fan Wu, E. Agu, Clifford Lindsay, Chung-Han Chen","doi":"10.4018/jhcr.2010070104","DOIUrl":"https://doi.org/10.4018/jhcr.2010070104","url":null,"abstract":"Mobile games and graphics are popular because un-tethered computing is convenient and ubiquitous entertainment is compelling. However, rendering graphics on mobile devices faces challenges due to limited system resources, such as battery energy, and low memory and disk space. Real time frame rates, low energy consumption and high image quality are all desirable attributes of interactive mobile graphics; however, achieving these objectives is conflicting. For instance, increasing mesh resolutions improves rendered image quality but consumes more battery energy. Therefore, the authors propose a mobile graphics heuristic to minimize energy consumption while maintaining acceptable image quality and interactive frame rates. Over the lifetime of a mobile graphics application, scene complexity, animation paths, user interactivity and other elements all change its CPU and resource demands. In this regard, a heuristic that dynamically changes scene mesh LoDs and amount of CPU timeslices allotted to the mobile graphics application is presented to select optimal operating conditions that balance rendering speed, energy conservation and image quality. Additionally, a workload predict model is proposed so that the heuristic can monitor both application workload and the availability of resources of mobile devices periodically, while adaptively determining how much resources will be allocated to applications.","PeriodicalId":265963,"journal":{"name":"Int. J. Handheld Comput. Res.","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131053092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Indoor Positioning Using FM Radio 利用调频收音机进行室内定位

Int. J. Handheld Comput. Res. Pub Date : 2010-07-01 DOI: 10.4018/jhcr.2010070102

Andrei Papliatseyeu, V. Osmani, O. Mayora-Ibarra

引用次数: 21

Design and Implementation of Binary Tree Based Proactive Routing Protocols for Large MANETS 大型MANETS中基于二叉树的主动路由协议的设计与实现

Int. J. Handheld Comput. Res. Pub Date : 2010-06-23 DOI: 10.4018/jhcr.2011100105

Pavan Kumar Pandey, G. P. Biswas

{"title":"Design and Implementation of Binary Tree Based Proactive Routing Protocols for Large MANETS","authors":"Pavan Kumar Pandey, G. P. Biswas","doi":"10.4018/jhcr.2011100105","DOIUrl":"https://doi.org/10.4018/jhcr.2011100105","url":null,"abstract":"The Mobile Ad hoc Network MANET is a collection of connected mobile nodes without any centralized administration. Proactive routing approach is one of those categories of proposed routing protocol which is not suitable for larger network due to their high overhead to maintain routing table for each and every node. The novelty of this approach is to form a binary tree structure of several independent sub-networks by decomposing a large network to sub-networks. Each sub-network is monitored by an agent node which is selected by several broadcasted regulations. Agent node maintains two routing information; one for local routing within the sub-network and another for routing through all other agent node. In routing mechanism first source node checks for destination within sub-network then source sends destination address to respective parent agent node if destination is not available in local routing, this process follows up to the destination node using agent mode. This approach allowed any proactive routing protocol with scalability for every routing mechanism. The proposed approach is thoroughly analyzed and its justification for the connectivity through sub-networks, routing between each source to destination pair, scalability, etc., are given, which show expected performance.","PeriodicalId":265963,"journal":{"name":"Int. J. Handheld Comput. Res.","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116061180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

A 2D Barcode Validation System for Mobile Commerce 面向移动商务的二维条码验证系统

Int. J. Handheld Comput. Res. Pub Date : 2010-05-10 DOI: 10.4018/jhcr.2011040101

David Kuo, Daniel Wong, J. Gao, Lee Chang

引用次数: 13

Applying Commonsense Reasoning to Place Identification 将常识推理应用于地点识别

Int. J. Handheld Comput. Res. Pub Date : 2010-04-01 DOI: 10.4018/jhcr.2010040103

M. Mamei

引用次数: 15

A Novel Energy Saving Approach through Mobile Collaborative Computing Systems 一种基于移动协同计算系统的新型节能方法

Int. J. Handheld Comput. Res. Pub Date : 2010-04-01 DOI: 10.4018/jhcr.2010040101

Xiaoxin Wu, Huan Chen, Yaoda Liu, Wenwu Zhu

{"title":"A Novel Energy Saving Approach through Mobile Collaborative Computing Systems","authors":"Xiaoxin Wu, Huan Chen, Yaoda Liu, Wenwu Zhu","doi":"10.4018/jhcr.2010040101","DOIUrl":"https://doi.org/10.4018/jhcr.2010040101","url":null,"abstract":"Energy saving has been studied widely in both of computing and communication research communities. For handheld devices, energy is becoming a more and more critical issue because lots of applications running on handhelds today are computation or communication intensive and take a long time to finish. Unlike previous work that proposes computing or communication energy solutions alone, this paper proposes a novel energy savings approach through mobile collaborative systems, which jointly consider computing and communication energy cost. In this work, the authors use streaming video as investigated application scenario and propose multi-hop pipelined wireless collaborative system to decode video frames with a requirement for maximum inter-frame time. To finish a computing task with such a requirement, this paper proposes a control policy that can dynamically adapt processor frequency and communication transmission rate at the collaborative devices. The authors build a mathematical energy model for collaborative computing systems. Results show that the collaborative system helps save energy, and the transmission rate between collaborators is a key parameter for maximizing energy savings. The energy saving algorithm in computing devices is implemented and the experimental results show the same trend.","PeriodicalId":265963,"journal":{"name":"Int. J. Handheld Comput. Res.","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116099213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Mobile Multimedia Streaming Using Secure Multipath in Wireless Ad Hoc Networks 在无线自组织网络中使用安全多路径的移动多媒体流

Int. J. Handheld Comput. Res. Pub Date : 2010-04-01 DOI: 10.4018/jhcr.2010040104

Lei Chen, Chung-wei Lee

引用次数: 9

A Collaborative Replication Approach for Mobile-P2P Networks 移动p2p网络的协同复制方法

Int. J. Handheld Comput. Res. Pub Date : 2010-04-01 DOI: 10.4018/jhcr.2010040105

Anirban Mondal, S. Madria, M. Kitsuregawa

{"title":"A Collaborative Replication Approach for Mobile-P2P Networks","authors":"Anirban Mondal, S. Madria, M. Kitsuregawa","doi":"10.4018/jhcr.2010040105","DOIUrl":"https://doi.org/10.4018/jhcr.2010040105","url":null,"abstract":"This paper proposes CADRE Collaborative Allocation and De-allocation of Replicas with Efficiency, which is a dynamic replication scheme for improving the typically low data availability in dedicated and cooperative mobile ad-hoc peer-to-peer M-P2P networks. In particular, replica allocation and de-allocation are collaboratively performed in tandem to facilitate effective replication. Such collaboration is facilitated by a hybrid super-peer architecture in which some of the mobile hosts act as the 'gateway nodes' GNs in a given region. GNs facilitate both search and replication. The main contributions of CADRE are as follows. First, it facilitates the prevention of 'thrashing' conditions due to its collaborative replica allocation and de-allocation mechanism. Second, it considers the replication of images at different resolutions to optimize the usage of the generally limited memory space of the mobile hosts MHs. Third, it addresses fair replica allocation across the MHs. Fourth, it facilitates the optimization of the limited energy resources of MHs during replication. The authors' performance evaluation demonstrates that CADRE is indeed effective in improving data availability in M-P2P networks with significant reduction in query response times and low communication traffic during replication as compared to a recent existing scheme as well as a baseline approach, which does not consider any replication.","PeriodicalId":265963,"journal":{"name":"Int. J. Handheld Comput. Res.","volume":"319 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116772739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A Measurement Framework of Mobile Service Adoption 移动服务采用的度量框架

Int. J. Handheld Comput. Res. Pub Date : 2010-04-01 DOI: 10.4018/jhcr.2010040102

H. Verkasalo

引用次数: 3