USENIX/ACM Workshop on Networked Systems for Developing Regions最新文献_第4页

Very long distance wi-fi networks 非常长距离的wi-fi网络

USENIX/ACM Workshop on Networked Systems for Developing Regions Pub Date : 2008-08-18 DOI: 10.1145/1397705.1397707

Rob Flickenger, Steve Okay, E. Pietrosemoli, M. Zennaro, C. Fonda

引用次数: 53

N-smarts: networked suite of mobile atmospheric real-time sensors N-smarts:移动大气实时传感器的联网套件

USENIX/ACM Workshop on Networked Systems for Developing Regions Pub Date : 2008-08-18 DOI: 10.1145/1397705.1397713

R. Honicky, E. Brewer, E. Paulos, Richard White

引用次数: 179

Secure rural supply chain management using low cost paper watermarking 使用低成本的纸张水印，确保农村供应链管理

USENIX/ACM Workshop on Networked Systems for Developing Regions Pub Date : 2008-08-18 DOI: 10.1145/1397705.1397711

Ashlesh Sharma, L. Subramanian, E. Brewer

引用次数: 12

Serengeti broadband 塞伦盖蒂的宽带

USENIX/ACM Workshop on Networked Systems for Developing Regions Pub Date : 2008-08-18 DOI: 10.1145/1397705.1397716

A. Nungu, B. Pehrson, Nsubis Genesis

{"title":"Serengeti broadband","authors":"A. Nungu, B. Pehrson, Nsubis Genesis","doi":"10.1145/1397705.1397716","DOIUrl":"https://doi.org/10.1145/1397705.1397716","url":null,"abstract":"This paper presents a broadband island defined by a fibre-optic communication network between Bunda and Serengeti, two rural districts in the Mara region in northern Tanzania. The purpose of the network is to facilitate creation and sharing of information at government institutions. The network is also expected to create jobs and entrepreneurial activities in these under-served areas\u0000 The network is comprised of an optical fibre backbone and wireless local area networks operating in license-free spectrum as access networks. The fibre is currently terminated at three locations. VLAN-capable Ethernet switches with long range optical transceivers provide backbone transmission as well as fibre access. To minimize costs, routers and servers in the network are all based on standard PC hardware and Free Open Source software. The infrastructure is operated under an Open Access regime, other ways of resource sharing like virtualization at the link; network and application layers are explored.\u0000 Although the broadband island defined by the fibre has a narrowband VSAT connection to the Internet, the focus on the services provided in the network is local, focusing on e-government, education, healthcare and support to local entrepreneurs.","PeriodicalId":189697,"journal":{"name":"USENIX/ACM Workshop on Networked Systems for Developing Regions","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128027262","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: 21

Optimal scheduling and power control for tdma based point to multipoint wireless networks 基于点对多点的tdma无线网络的最优调度和功率控制

USENIX/ACM Workshop on Networked Systems for Developing Regions Pub Date : 2008-08-18 DOI: 10.1145/1397705.1397708

Rabin K. Patra, S. Surana, S. Nedevschi, E. Brewer

{"title":"Optimal scheduling and power control for tdma based point to multipoint wireless networks","authors":"Rabin K. Patra, S. Surana, S. Nedevschi, E. Brewer","doi":"10.1145/1397705.1397708","DOIUrl":"https://doi.org/10.1145/1397705.1397708","url":null,"abstract":"In TDMA-based point-to-multipoint rural wireless deployments, co-located base station radios and sector antennas are used to increase base station capacity. To achieve maximum capacity with limited availability of non-overlapping wireless channels, we need to operate as many radios as possible from different sectors on the same channel. However, operating co-located radios on the same channel can result in substantial interference especially with the current practice of operating all radios at maximum power. We investigate techniques that increase network throughput by eliminating this interference.\u0000 To this end we formulate an LP optimization problem that maximizes throughput by computing optimal transmit schedules, optimal allocation of clients to base station radios, and optimal radio power levels. Our results suggest that there is a large gap between currently-used and optimal strategies, creating opportunities for simple, practical algorithms to address these issues. Our techniques are equally applicable to both WiFi based networks as well as other point-to-multipoint technologies such as WiMax.","PeriodicalId":189697,"journal":{"name":"USENIX/ACM Workshop on Networked Systems for Developing Regions","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128397376","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: 14

Providing voice connectivity to rural India using WiMAX: issues and solution 使用WiMAX向印度农村提供语音连接:问题和解决方案

USENIX/ACM Workshop on Networked Systems for Developing Regions Pub Date : 2007-08-27 DOI: 10.1145/1326571.1326574

A. Lele, M. Raj, D. Das

{"title":"Providing voice connectivity to rural India using WiMAX: issues and solution","authors":"A. Lele, M. Raj, D. Das","doi":"10.1145/1326571.1326574","DOIUrl":"https://doi.org/10.1145/1326571.1326574","url":null,"abstract":"The need of emerging markets telecom, specifically in the Indian telecom scenario, WiMAX is being looked as a broadband access solution ahead of LTE and other competing technologies due its long range and high bandwidth. Voice Over IP (VoIP) will potentially be the killer application for emerging market like India. In this paper we propose a Kiosk based WiMAX infrastructure model to provide voice connectivity to rural Indian villages. In the proposed kiosk model, plain old telephones are connected to a WiMAX subscriber station using Foreign Exchange Subscriber and a Media Gateway. The novelty of the kiosk based infrastructure models is that it has low deployment cost from a service provider perspective, and almost negligible equipment cost for the end user.\u0000 In order to make the kiosk based model economically sustainable, the number of simultaneous voice calls that can be supported over the WiMAX subscriber stations needs to be maximized. To this end, the paper proposes a Dynamic Frame Profile algorithm to maximize the number of VoIP calls supported over a single subscriber station. A performance evaluation of the the proposed Dynamic Frame Profile algorithm is also carried out to study its effectiveness and reported in this paper.","PeriodicalId":189697,"journal":{"name":"USENIX/ACM Workshop on Networked Systems for Developing Regions","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134201211","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: 8

DTLSR: delay tolerant routing for developing regions DTLSR:发展中区域的容延迟路由

USENIX/ACM Workshop on Networked Systems for Developing Regions Pub Date : 2007-08-27 DOI: 10.1145/1326571.1326579

M. Demmer, K. Fall

引用次数: 170

TinyPC: enabling low-cost internet access in developing regions TinyPC:在发展中地区实现低成本互联网接入

USENIX/ACM Workshop on Networked Systems for Developing Regions Pub Date : 2007-08-27 DOI: 10.1145/1326571.1326576

Muneeb Ali, K. Langendoen

引用次数: 7

Scalable DTN distribution over uni-directional links 单向链路上可扩展的DTN分布

USENIX/ACM Workshop on Networked Systems for Developing Regions Pub Date : 2007-08-27 DOI: 10.1145/1326571.1326580

D. Kutscher, Janico Greifenberg, K. Loos

引用次数: 22

Reliable data collection in highly disconnected environments using mobile phones 使用移动电话在高度断开连接的环境中可靠地收集数据

USENIX/ACM Workshop on Networked Systems for Developing Regions Pub Date : 2007-08-27 DOI: 10.1145/1326571.1326577

B. DeRenzi, Yaw Anokwa, Tapan S. Parikh, G. Borriello

{"title":"Reliable data collection in highly disconnected environments using mobile phones","authors":"B. DeRenzi, Yaw Anokwa, Tapan S. Parikh, G. Borriello","doi":"10.1145/1326571.1326577","DOIUrl":"https://doi.org/10.1145/1326571.1326577","url":null,"abstract":"Over four and a half billion people live in the developing world and require access to services in the financial, agricultural, business, government and healthcare sectors. Due to constraints of the existing infrastructure (power, communications, etc), it is often difficult to deliver these services to remote areas in a timely and efficient manner.\u0000 The CAM framework has found success as a flexible platform for quickly developing and deploying high-impact applications for these environments. Many of the applications built with CAM have relied on a model where a field worker with a mobile phone regularly returns from a disconnected environment to one with connectivity. In this connected state, the phone and a centralized server can exchange information and get the collected data backed up on reliable media.\u0000 We propose extending CAM's networking model to enable continual operation in disconnected environments. Using a set of heterogeneous paths made available through social and geographic relationships naturally present among workers, we describe a system for asynchronously routing data in a best-effort manner.","PeriodicalId":189697,"journal":{"name":"USENIX/ACM Workshop on Networked Systems for Developing Regions","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114141997","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: 16