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On the performance of TDD-TD/CDMA architectures with heterogeneous traffic 异构业务量下TDD-TD/CDMA体系结构的性能研究
WMI '01 Pub Date : 2001-07-21 DOI: 10.1145/381472.381585
M. Casoni, M. L. Merani
{"title":"On the performance of TDD-TD/CDMA architectures with heterogeneous traffic","authors":"M. Casoni, M. L. Merani","doi":"10.1145/381472.381585","DOIUrl":"https://doi.org/10.1145/381472.381585","url":null,"abstract":"This paper determines the capacity of a TDD- TD/CDMA architecturewhich supports different classes of subscribers and adopts aninterference-driven admission control policy. The blocking and theoutage probability of the system users are evaluated under varioustraffic conditions for several uplink/downlink configurations ofthe time slots, demonstrating that the time division full duplexapproach needs a careful tuning in order to maximize systemcapacity. Our work further shows that even when data traffic playsthe predominant role, the TDD system can satisfyingly cope withremarkable traffic loads and support several Erlangs of traffic percell.","PeriodicalId":429648,"journal":{"name":"WMI '01","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133756912","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: 0
Multimedia support over bluetooth Piconets 多媒体支持蓝牙piconet
WMI '01 Pub Date : 2001-07-21 DOI: 10.1145/381472.381569
R. Kapoor, M. Kazantzidis, M. Gerla, P. Johansson
{"title":"Multimedia support over bluetooth Piconets","authors":"R. Kapoor, M. Kazantzidis, M. Gerla, P. Johansson","doi":"10.1145/381472.381569","DOIUrl":"https://doi.org/10.1145/381472.381569","url":null,"abstract":"In this paper we explore the ability to support multimedia trafficin indoor, wireless ad hoc PANs (Personal Area Networks) using theBluetooth technology. We first define the representative ad hocnetworking applications such as wireless access to the Internet,document distribution, videoconferencing, webcasting, interactionwith sensors and actuators, etc. For such applications, we definethe performance requirements placed on the PAN. There are twotechnologies now competing for the PAN market: the IEEE802.11“legacy” technology, and the newly introduced Bluetoothtechnology. By IEEE802.11, we refer to the operation of 802.11 inthe DCF mode, which is the mode implemented in the commercialWaveLAN cards. In the rest of the paper, we will use WaveLAN torefer to 802.11 in its DCF mode. We will attempt to answer thequestions: how effective is the Bluetooth technology in supportingcollaborative, “virtual ad hoc networking” applicationsand how does it compare with WaveLAN? To answer these questions, wehave developed an NS-2 model of Bluetooth. We have also developedmodels of adaptive applications such as voice and video. ForWaveLAN, we have used the existing NS-2 models. The results showthat Bluetooth provides better support for real-time applicationsas compared to WaveLAN. It does not exhibit the“capture” behavior observed, for example, in WaveLAN.Also, with the addition of nodes to the “indoor” space,it adds to the total “system” capacity and gives abetter overall throughput.","PeriodicalId":429648,"journal":{"name":"WMI '01","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132848369","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: 20
GIP: an infrastructure for mobile intranets development GIP:用于移动内部网开发的基础设施
WMI '01 Pub Date : 2001-07-21 DOI: 10.1145/381472.381562
C. Grecas, S. Maniatis, I. Venieris
{"title":"GIP: an infrastructure for mobile intranets development","authors":"C. Grecas, S. Maniatis, I. Venieris","doi":"10.1145/381472.381562","DOIUrl":"https://doi.org/10.1145/381472.381562","url":null,"abstract":"The GPRS and UMTS specifications define the procedures supportingthe mobility and the data sessions of a mobile user moving withinthe area of the corresponding PLMNs. For the case, though, ofmobile users working in group, using a PLMN infrastructure, theaforementioned networks foresee no special treatment. However,services tightly related to a specific geographic area, like forexample security or surveillance services, could be implemented bya group of collaborating Mobile Nodes forming a mobile intranetthat uses the facilities of a PLMN. In this paper, after adescription of what the specifications provide, methods areproposed for the deployment of intranets over the GPRS or the UMTSinfrastructure. At this aim, the concept of the GIP is introducedregarding a frame of interconnected SGSNs, within the GPRS/UMTSenvironment. This frame supports, without the intervention of theGGSN, the mobility of a number of Mobile Nodes belonging to thesame group, as well as the data traffic between them. Moreover, theadditional tasks to be undertaken by the SGSNs forming the frameare described.","PeriodicalId":429648,"journal":{"name":"WMI '01","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115151258","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: 2
A service framework for carrier grade multimedia services using PARPLAY APIs over a SIP system 在SIP系统上使用PARPLAY api的运营商级多媒体业务的服务框架
WMI '01 Pub Date : 2001-07-21 DOI: 10.1145/381472.381584
R. Pailer, J. Stadler
{"title":"A service framework for carrier grade multimedia services using PARPLAY APIs over a SIP system","authors":"R. Pailer, J. Stadler","doi":"10.1145/381472.381584","DOIUrl":"https://doi.org/10.1145/381472.381584","url":null,"abstract":"The implementation of new mobile communication technologiesdeveloped in the third generation partnership project (3GPP) willallow to access the Internet not only from a PC but also via mobilephones, palmtops and other devices. New applications will emerge,combining several basic services like voice telephony, e-mail,voice over IP, mobility or web-browsing, and thus wiping out theborders between the fixed telephone network, mobile radio and theInternet. Offering those value-added services will be the keyfactor for success of network and service providers in anincreasingly competitive market. In 3GPP's service framework theuse of the PARLAY APIs is proposed that allow applicationdevelopment by third parties in order to speed up service creationand deployment. 3GPP has also adopted SIP for session control ofmultimedia communications in an IP network. This paper proposes amapping of SIP functionality to PARLAY services and describes aprototype implementation using the SIP Servlet API. Furthermore anarchitecture of a Service Platform is presented that offers aframework for the creation, execution and management of carriergrade multimedia services in heterogeneous networks.","PeriodicalId":429648,"journal":{"name":"WMI '01","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128565612","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: 11
iMobile: a proxy-based platform for mobile services iMobile:基于代理的移动服务平台
WMI '01 Pub Date : 2001-07-21 DOI: 10.1145/381472.381483
H. Rao, Di-Fa Chang, Y. Chen, Ming-Feng Chen
{"title":"iMobile: a proxy-based platform for mobile services","authors":"H. Rao, Di-Fa Chang, Y. Chen, Ming-Feng Chen","doi":"10.1145/381472.381483","DOIUrl":"https://doi.org/10.1145/381472.381483","url":null,"abstract":"iMobile is a proxy-based platform that addresses the researchissues in building mobile services. iMobile acts as a massagegateway that allows mobile devices using various protocols ondifferent access networks to relay messages to each other. It alsoallows these clients to access internet services, corporatedatabases, and to control various networked devices. iMobileimplements three key abstractions: devlet, infolet,and applet. A devlet is a driver attached to the proxy thatreceives and sends messages through a particular protocol formobile devices. An infolet hosted on iMobile uses an access methodto provide an abstract view of an information space. An appletimplements service or application logic by processing informationfrom various infolets. The Core of iMobile, the let engine,implements the basic framework for maintaining applets, devlets andinfolets, supports user and device profiles for personalization andtranscoding, and invokes proper applets and infolets to answerrequests from a devlet. The iMobile architecture allows new accessdevices and protocols to be added to its framework without changesin the service logic. iMobile effectively provides a personal agenton the network that enables a user to have mobile access to thevast information and services available on the various wireless andwireline networks, without being limited by where the user is orwhat device or communication or protocol is available.","PeriodicalId":429648,"journal":{"name":"WMI '01","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133748447","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: 52
A wireless public access infrastructure for supporting mobile context-aware IPv6 applications 一个无线公共访问基础设施，用于支持移动上下文感知IPv6应用程序
WMI '01 Pub Date : 2001-07-21 DOI: 10.1145/381472.381555
A. Friday, Maomao Wu, S. Schmid, J. Finney, K. Cheverst, N. Davies
{"title":"A wireless public access infrastructure for supporting mobile context-aware IPv6 applications","authors":"A. Friday, Maomao Wu, S. Schmid, J. Finney, K. Cheverst, N. Davies","doi":"10.1145/381472.381555","DOIUrl":"https://doi.org/10.1145/381472.381555","url":null,"abstract":"This paper presents a novel wireless access point architecturedesigned to support the development of next generation mobilecontext-aware applications over metropolitan scale areas. Inaddition, once deployed, this network will allow ordinary citizenssecure, accountable and convenient access to the Internet fromtheir local city and campus environments.\u0000The proposed architecture is based on an approach utilising amodified Mobile IPv6 protocol stack that uses packet marking andnetwork level packet filtering at the edge of the wired network toachieve this objective. The paper describes this architecture indetail and contrasts it with existing systems to highlight the keybenefits of our approach.","PeriodicalId":429648,"journal":{"name":"WMI '01","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129589584","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
Wireless access to internet via Bluetooth: performance evaluation of the EDC scheduling algorithm 蓝牙无线上网:EDC调度算法的性能评价
WMI '01 Pub Date : 2001-07-21 DOI: 10.1145/381472.381568
R. Bruno, M. Conti, E. Gregori
{"title":"Wireless access to internet via Bluetooth: performance evaluation of the EDC scheduling algorithm","authors":"R. Bruno, M. Conti, E. Gregori","doi":"10.1145/381472.381568","DOIUrl":"https://doi.org/10.1145/381472.381568","url":null,"abstract":"Bluetooth is an emerging technology for constructing adhoc wirelessPersonal Area Networks (WPANs). In this paper we analyze aninnovative scheduling algorithm for asynchronous data trafficspecifically tailored to the Bluetooth characteristic. Thisalgorithm, named Efficient Double-Cycle (EDC), dynamically adaptsthe polling frequency to the traffic conditions. By considering ascenario where a Bluetooth master is used as wireless access pointto the Internet, we show that our EDC scheduler significantlyenhances the system performance with regard to a Round Robin (RR)scheduler.","PeriodicalId":429648,"journal":{"name":"WMI '01","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131994864","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: 35
The impact of delayed acknowledgments on TCP performance over satellite links 延迟确认对卫星链路上TCP性能的影响
WMI '01 Pub Date : 2001-07-21 DOI: 10.1145/381472.381573
Tanja Lang, D. Floreani
{"title":"The impact of delayed acknowledgments on TCP performance over satellite links","authors":"Tanja Lang, D. Floreani","doi":"10.1145/381472.381573","DOIUrl":"https://doi.org/10.1145/381472.381573","url":null,"abstract":"The performance of the Transmission Control Protocol (TCP) overnetwork paths that include a wireless or a satellite link is a veryactive area of research. A number of papers have been publishedproposing different ways to improve TCP over these kinds of links,either by new TCP functionality, or by link level enhancements.Very few of these papers consider the delayed acknowledgmentstrategy that is implemented by many TCP receivers, when presentingtheir results. In this paper we will show that this acknowledgmentstrategy can have a significant impact on the performance of TCPand should not be neglected when evaluating new solutions forwireless environments.","PeriodicalId":429648,"journal":{"name":"WMI '01","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130016659","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: 9
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