International Workshop on Mobile Opportunistic Networks最新文献_第7页

Evaluating contacts for routing in highly partitioned mobile networks 在高度分割的移动网络中评估路由的接触

International Workshop on Mobile Opportunistic Networks Pub Date : 2007-06-11 DOI: 10.1145/1247694.1247698

Chao-Yu Chen, Zesheng Chen

引用次数: 14

Contention-aware analysis of routing schemes for mobile opportunistic networks 移动机会网络路由方案的竞争感知分析

International Workshop on Mobile Opportunistic Networks Pub Date : 2007-06-11 DOI: 10.1145/1247694.1247696

A. Jindal, K. Psounis

引用次数: 22

Hybrid routing in clustered DTNs with message ferrying 具有消息传送的集群ddn中的混合路由

International Workshop on Mobile Opportunistic Networks Pub Date : 2007-06-11 DOI: 10.1145/1247694.1247710

Yang-Jie Chen, Wenrui Zhao, M. Ammar, E. Zegura

{"title":"Hybrid routing in clustered DTNs with message ferrying","authors":"Yang-Jie Chen, Wenrui Zhao, M. Ammar, E. Zegura","doi":"10.1145/1247694.1247710","DOIUrl":"https://doi.org/10.1145/1247694.1247710","url":null,"abstract":"The mobile wireless research community has invested in the development of routing algorithms and protocols for two distinct environments. The mobile ad-hoc network (MANET) environment is generally assumed to contain relatively dense nodes connected by multi-hop paths, where disconnection is rare. The disruption tolerant network (DTN) environment is generally assumed to contain relatively sparse nodes that are frequently disconnected. We are interested in a different environment in which clusters of nodes have MANET-like dense connectivity, while there is DTN-like sparse connectivity between clusters. We focus in this paper on the case of stationary clusters, where message ferrying provides inter-cluster connectivity. Our routing approach combines message ferry routing with MANET routing through the use of gateway nodes. To best utilize gateway nodes, we develop various algorithms for data aggregation at gateways and transmission scheduling between gateways and the ferry. To further improve performance, we design algorithms to customize ferry routes according to node location and traffic condition. Our hybrid routing schemes are evaluated via extensive simulations.","PeriodicalId":198518,"journal":{"name":"International Workshop on Mobile Opportunistic Networks","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125289296","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: 28

A comparison of opportunistic and deterministic forwarding in mobile multihop wireless networks 移动多跳无线网络中机会性和确定性转发的比较

International Workshop on Mobile Opportunistic Networks Pub Date : 2007-06-11 DOI: 10.1145/1247694.1247697

Jonghyune Kim, S. Bohacek

{"title":"A comparison of opportunistic and deterministic forwarding in mobile multihop wireless networks","authors":"Jonghyune Kim, S. Bohacek","doi":"10.1145/1247694.1247697","DOIUrl":"https://doi.org/10.1145/1247694.1247697","url":null,"abstract":"While opportunistic packet forwarding has been extensively studied in the case of single hop communication, only recently has opportunistic forwarding for multihop networks been explored. One key aspect of opportunistic forwarding is that the node that forwards a packet is determined on-the-fly and depends on which nodes receive the packet. On the other hand, in deterministic forwarding, the node that will forward the packet is predetermined. There are several key differences between these approaches. Opportunistic forwarding is able to make use of links where packet delivery is possible with a low probability and can easily accommodate channel fluctuations. But in order to reduce collisions, overhead is required to determine which node will forward the packet. The deterministic scheme considered is able to adaptively react to changes in the route quality, but requires overhead to update the route. In this paper, we examine which approach provides the best performance. It is found that the relative performance depends on mobility and the physical layer. However, in most cases, deterministic forwarding, along with route quality monitoring and high frequency route updates, outperforms opportunistic forwarding.","PeriodicalId":198518,"journal":{"name":"International Workshop on Mobile Opportunistic Networks","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126164546","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: 19

Applicability of identity-based cryptography for disruption-tolerant networking 基于身份的加密技术在容错网络中的适用性

International Workshop on Mobile Opportunistic Networks Pub Date : 2007-06-11 DOI: 10.1145/1247694.1247705

N. Asokan, Kari Kostiainen, Philip Ginzboorg, J. Ott, Cheng Luo

引用次数: 88

Incentive-based cooperative and secure inter-personal networking 基于激励的合作和安全的人际网络

International Workshop on Mobile Opportunistic Networks Pub Date : 2007-06-11 DOI: 10.1145/1247694.1247706

Karim M. El Defrawy, M. Zarki, G. Tsudik

引用次数: 6

Reliable and efficient message delivery in delay tolerant networks using rateless codes 使用无速率码的可容忍延迟网络中可靠和高效的消息传递

International Workshop on Mobile Opportunistic Networks Pub Date : 2007-06-11 DOI: 10.1145/1247694.1247712

B. Vellambi, R. Subramanian, F. Fekri, M. Ammar

{"title":"Reliable and efficient message delivery in delay tolerant networks using rateless codes","authors":"B. Vellambi, R. Subramanian, F. Fekri, M. Ammar","doi":"10.1145/1247694.1247712","DOIUrl":"https://doi.org/10.1145/1247694.1247712","url":null,"abstract":"In this paper, we consider the problem of multiple unicast message delivery in Delay Tolerant Networks (DTNs). Long delays, mobility of nodes, and lack of connectivity that are characteristics of such network make this problem very challenging. Additionally, expiry of packets in a network, considered a useful means of regulating resource consumption, reduces reliability and increases the latency of message delivery. Traditional approaches to message delivery in such networks was based on transmitting multiple copies of entire message blocks. Recently, the application of simple erasure-based codes to messages were considered. This option opened up an interesting area of research. In this paper, we effect reliable message delivery with improved latency even in the presence of packet expiry and intermittent connectivity by applying rateless codes at the source where a message is generated. We perform extensive simulations on a variety of trace data from mobility models such as the UMassDieselNet testbed, an area-based random waypoint model, and a simple campus bus model. Results reveal the superiority of our scheme in comparison to other present schemes.","PeriodicalId":198518,"journal":{"name":"International Workshop on Mobile Opportunistic Networks","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117335071","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: 45

Opportunistic spatio-temporal dissemination system for vehicular networks 车载网络的机会时空传播系统

International Workshop on Mobile Opportunistic Networks Pub Date : 2007-06-11 DOI: 10.1145/1247694.1247702

Ilias Leontiadis, C. Mascolo

{"title":"Opportunistic spatio-temporal dissemination system for vehicular networks","authors":"Ilias Leontiadis, C. Mascolo","doi":"10.1145/1247694.1247702","DOIUrl":"https://doi.org/10.1145/1247694.1247702","url":null,"abstract":"Opportunistic dissemination protocols have potentially applications in the domain of vehicular networking, ranging from advertising to emergency/traffic/parking information spreading: one of the characteristics of vehicular networks is that they are often partitioned due to lack of continuity in connectivity among cars or limited coverage of infostations in remote areas. Most available opportunistic, or delay tolerant, networking protocols, however, fail to take into account the peculiarities of vehicular networks.\u0000 This paper introduces a novel opportunistic event dissemination protocol for vehicular networks. The protocol takes into account the characteristics of these networks in order to dispatch the publications to the subscribers. Furthermore, it uses opportunistic cache and replay mechanisms to deliver the notifications to new subscribers in the area throughout the publication interval. We evaluate our approach through simulation using realistic vehicular traces. We compare our algorithm with a standard epidemic protocol, which offer the best alternative in terms of message delivery, by measuring overhead and delivery over a number of scenarios.","PeriodicalId":198518,"journal":{"name":"International Workshop on Mobile Opportunistic Networks","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125055768","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: 126

Evaluating vehicle network strategies for downtown Portland: opportunistic infrastructure and the importance of realistic mobility models 评估波特兰市中心的车辆网络策略:机会基础设施和现实移动模型的重要性

International Workshop on Mobile Opportunistic Networks Pub Date : 2007-06-11 DOI: 10.1145/1247694.1247704

G. Marfia, G. Pau, E. D. Sena, E. Giordano, M. Gerla

{"title":"Evaluating vehicle network strategies for downtown Portland: opportunistic infrastructure and the importance of realistic mobility models","authors":"G. Marfia, G. Pau, E. D. Sena, E. Giordano, M. Gerla","doi":"10.1145/1247694.1247704","DOIUrl":"https://doi.org/10.1145/1247694.1247704","url":null,"abstract":"In an urban environment, vehicles can opportunistically exploit infrastructure through open Access Points (APs) to efficiently communicate with other vehicles. This is to avoid long wireless ad hoc paths, and to alleviate congestion in the wireless grid. Analytic and simulation models are used to optimize the communications and networking strategies. For realistic results, one important challenge is the accurate representation of traffic mobility patterns.\u0000 In this paper we introduce realistic vehicular mobility traces of downtown Portland, Oregon, obtained fromextremely detailed large scale traffic simulations performed at the Los Alamos National Laboratories (LANL). To the best of our knowledge, these are among the most accurate synthetic motion traces available for study, with the exception of actual car trace measurements. The new mobility model is used to evaluate AODV [1] in flat and opportunistic infrastructure routing. To assess the importance of a realistic mobility model for this evaluation, we compare these results with those obtained with CORSIM [2] traces.\u0000 The paper makes the following contributions: (a) introduction of efficient, opportunistic strategies for extending the AP infrastructure to use vehicle to vehicle paths, and (b) assessment of different mobility models - CORSIM traces and LANL's realistic vehicular traces - in the modeling of different routing strategies.","PeriodicalId":198518,"journal":{"name":"International Workshop on Mobile Opportunistic Networks","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127690767","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: 97

Reactive sink mobility in wireless sensor networks 无线传感器网络中的响应汇迁移

International Workshop on Mobile Opportunistic Networks Pub Date : 2007-06-11 DOI: 10.1145/1247694.1247700

D. Puccinelli, Matthew Brennan, M. Haenggi

引用次数: 16