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Checksum-based loss differentiation 基于校验和的损失区分
4th International Workshop on Mobile and Wireless Communications Network Pub Date : 2002-12-10 DOI: 10.1109/MWCN.2002.1045730
Johan Garcia, A. Brunström
{"title":"Checksum-based loss differentiation","authors":"Johan Garcia, A. Brunström","doi":"10.1109/MWCN.2002.1045730","DOIUrl":"https://doi.org/10.1109/MWCN.2002.1045730","url":null,"abstract":"In a wireless environment the common transport protocol assumption that all packet losses are due to congestion no longer holds true. If the transport protocols react identically to both congestion and non-congestion related losses, performance will degrade. To avoid this performance problem, transport protocols must be able to differentiate between losses that are due to congestion and losses that are due to wireless link errors. Suitable congestion avoidance behavior can then be applied as appropriate. This paper overviews previous work on loss differentiation, and proposes a checksum-based scheme. The proposed scheme reuses the checksums already available at various layers in the receiver end-host protocol stack. It is an end-to-end solution for the case where the lossy link is the last hop. Header decoding, data integrity and other issues related to the implementation of our checksum-based scheme are also discussed.","PeriodicalId":323344,"journal":{"name":"4th International Workshop on Mobile and Wireless Communications Network","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121785456","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
Modeling of software radio aspects by mapping of SDL and CORBA 通过SDL和CORBA的映射对软件无线电方面进行建模
4th International Workshop on Mobile and Wireless Communications Network Pub Date : 2002-12-10 DOI: 10.1109/MWCN.2002.1045845
A. Mahimkar
{"title":"Modeling of software radio aspects by mapping of SDL and CORBA","authors":"A. Mahimkar","doi":"10.1109/MWCN.2002.1045845","DOIUrl":"https://doi.org/10.1109/MWCN.2002.1045845","url":null,"abstract":"With the evolution of 3/sup rd/ generation mobile communications standardization, the software radio concept has the potential to offer a pragmatic solution - a software implementation that allows the mobile terminal to adapt dynamically to its radio environment. The mapping of SDL and CORBA mechanisms is introduced, in order to provide a generic platform for the implementation of future mobile services, supporting standardized interfaces and manufacturer platform independent object and service functionality description. For the functional entity diagram model, it is proposed that the functional entities be designed as objects, the functional entities group as 'open' object oriented SDL platforms, and the interfaces between them as CORBA IDLs, communicating via the ORB in a generic implementation and location independent way. The functional entity groups are proposed to be modeled as SDL block types, while the functional entities and sub-entities as SDL process and service types. The objects interact with each other like client or server objects requesting or receiving services from other objects. Every object has a CORBA IDL interface, which allows every component to be distributed in an optimum way by providing a standardized infrastructure, ensuring interoperability, flexibility, reusability, transparency and management capabilities.","PeriodicalId":323344,"journal":{"name":"4th International Workshop on Mobile and Wireless Communications Network","volume":"173 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123774003","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 simulation design for link connection-oriented wireless mesh networks 面向链路连接的无线网状网络仿真设计
4th International Workshop on Mobile and Wireless Communications Network Pub Date : 2002-12-10 DOI: 10.1109/MWCN.2002.1045849
R. Luo, D. Belis, R. Edwards, G. Manson
{"title":"A simulation design for link connection-oriented wireless mesh networks","authors":"R. Luo, D. Belis, R. Edwards, G. Manson","doi":"10.1109/MWCN.2002.1045849","DOIUrl":"https://doi.org/10.1109/MWCN.2002.1045849","url":null,"abstract":"Medium access control (MAC) is an intermediate layer to manage the policy of link transmissions so that nodes in the same network segment can send packets without constant interference from other nodes. It should give each node the opportunity to transmit packets successfully. Most existing wireless LAN techniques use contention-enable MACs, which are statistical multiplexing algorithms to control multiaccess. Compared to them, regular division-based MACs, such as time division multiplexing (TDM) or frequency division multiplexing (FDM), are seldom used in wireless LANs due to the inefficiency that is shown by the inflexible dynamic bandwidth allocation to nodes. Quality of service (QoS) takes into account this inflexibility in resource reservation in order to grant enough resource to services, even when they are idle. As a result, link connection-oriented networks with mesh topology are considered a good research topic. The corresponding simulation model is required where most current simulation tools do not provide one directly. We present a simple link connection-oriented network simulation design in C without using any existing simulation packages. It can help researchers to design the overall simulation in other related areas, and later it could be extended to a complete simulation tool.","PeriodicalId":323344,"journal":{"name":"4th International Workshop on Mobile and Wireless Communications Network","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121866535","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 QoS provisioning framework for high-speed multimedia wireless networks 高速多媒体无线网络的QoS配置框架
4th International Workshop on Mobile and Wireless Communications Network Pub Date : 2002-12-10 DOI: 10.1109/MWCN.2002.1045718
Lin Zheng, Zongkai Yang, Jianhua He, C. Chou
{"title":"A QoS provisioning framework for high-speed multimedia wireless networks","authors":"Lin Zheng, Zongkai Yang, Jianhua He, C. Chou","doi":"10.1109/MWCN.2002.1045718","DOIUrl":"https://doi.org/10.1109/MWCN.2002.1045718","url":null,"abstract":"This paper addresses the problem of QoS guarantees for high-speed multimedia wireless networks and proposes a framework of QoS provisioning. In this framework, mobile users provide their connections' QoS requests and are categorized into different traffic classes. A cell associates each class of service defined within it with a resource pool, which offers a way to assign priority for service classes. The proposed framework provides two granularities for QoS guarantee. For single cell, the size of resource pools are adaptively adjusted based on current network conditions, which statistically provides QoS guarantee as a whole. For individual connection, a bandwidth borrowing scheme is introduced into the framework to guarantee connection dropping probability. Each cell implements a resource reservation algorithm independently and periodically. No resource is explicitly reserved for possible handoff connection. So the proposed framework is completely in a distributed manner and the connection admission control can be designed to be simple and efficient.","PeriodicalId":323344,"journal":{"name":"4th International Workshop on Mobile and Wireless Communications Network","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129308136","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
Class based selective-ARQ scheme for high performance TCP and UDP over wireless links 基于类的选择性arq方案，用于无线链路上的高性能TCP和UDP
4th International Workshop on Mobile and Wireless Communications Network Pub Date : 2002-12-10 DOI: 10.1109/MWCN.2002.1045743
C. Ladas, R. M. E. Amiee, M. Mahdavi, G. Manson
{"title":"Class based selective-ARQ scheme for high performance TCP and UDP over wireless links","authors":"C. Ladas, R. M. E. Amiee, M. Mahdavi, G. Manson","doi":"10.1109/MWCN.2002.1045743","DOIUrl":"https://doi.org/10.1109/MWCN.2002.1045743","url":null,"abstract":"Applications and services for mobile devices can benefit substantially from the use of automatic repeat request (ARQ) link layer protocols for wireless connections. However, a drawback comes with their use when transferring mixed traffic type, which is the introduction of excessive and highly jittered transmission delay, which negatively affect the performance of both real-time and TCP traffic. Here, we propose a selective ARQ protocol which is capable of switching between ARQ and non-ARQ modes based on two policies which we have defined. Our first policy is based on the assumption that for real-time traffic minimisation of delay is more important than reliable transmission. The second policy is an extension of the first and introduces a mechanism, which monitors the length of the buffer queue to decide whether or not packets should be sent with or without ARQ. Results obtained in this research show that real-time traffic can be sent with minimal delay jitter and within certain time boundaries, whilst TCP throughput can be increased significantly.","PeriodicalId":323344,"journal":{"name":"4th International Workshop on Mobile and Wireless Communications Network","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129895372","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: 6
Service provision based on mobile agents in mobile computing environments 移动计算环境下基于移动代理的业务提供
4th International Workshop on Mobile and Wireless Communications Network Pub Date : 2002-12-10 DOI: 10.1109/MWCN.2002.1045833
Ouahiba Fouial, N. Boukhatem, I. Demeure
{"title":"Service provision based on mobile agents in mobile computing environments","authors":"Ouahiba Fouial, N. Boukhatem, I. Demeure","doi":"10.1109/MWCN.2002.1045833","DOIUrl":"https://doi.org/10.1109/MWCN.2002.1045833","url":null,"abstract":"We investigate the use of mobile agents (MA) for service provision in mobile computing environments. In this context, we present the results of a comparative study between Java RMI and mobile agents. Experimental measurements are performed to compare both paradigms. The results show that significant performance improvement can be obtained using mobile agents. An agent-based service scenario is presented to illustrate the benefits of using mobile agents for service provision and their potential impact on mobile computing environments.","PeriodicalId":323344,"journal":{"name":"4th International Workshop on Mobile and Wireless Communications Network","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130379865","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
A comparision of the performance of four TCP versions during mobile hand-off 四种TCP版本在移动切换过程中的性能比较
4th International Workshop on Mobile and Wireless Communications Network Pub Date : 2002-12-10 DOI: 10.1109/MWCN.2002.1045727
T. Schwabe, J. Schuler
{"title":"A comparision of the performance of four TCP versions during mobile hand-off","authors":"T. Schwabe, J. Schuler","doi":"10.1109/MWCN.2002.1045727","DOIUrl":"https://doi.org/10.1109/MWCN.2002.1045727","url":null,"abstract":"The transmission control protocol (TCP) is a well established protocol for reliable data transport in today's IP based internetwork. With the introduction of new, mobile oriented access technologies TCP faces new challenges. This paper investigates the influence of mobile user hand-offs on the performance of TCP.","PeriodicalId":323344,"journal":{"name":"4th International Workshop on Mobile and Wireless Communications Network","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124526359","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
Clustered fisheye state routing for ad hoc wireless networks 自组织无线网络的集群鱼眼状态路由
4th International Workshop on Mobile and Wireless Communications Network Pub Date : 2002-12-10 DOI: 10.1109/MWCN.2002.1045723
G. Dimitriadis, F. Pavlidou
{"title":"Clustered fisheye state routing for ad hoc wireless networks","authors":"G. Dimitriadis, F. Pavlidou","doi":"10.1109/MWCN.2002.1045723","DOIUrl":"https://doi.org/10.1109/MWCN.2002.1045723","url":null,"abstract":"This paper presents a routing scheme based on fisheye state routing (FSR), which employs a clustering framework in order to reduce the redundancy in the broadcasts of topology information. Clustered fisheye state routing (CFSR) consumes less bandwidth by restricting the propagation of routing control messages in paths formed by alternating gateways and clusterheads, and allowing the gateways to selectively include routing table entries in their control messages.","PeriodicalId":323344,"journal":{"name":"4th International Workshop on Mobile and Wireless Communications Network","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127875850","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
Extensible mobile presence 可扩展的移动状态
4th International Workshop on Mobile and Wireless Communications Network Pub Date : 2002-12-10 DOI: 10.1109/MWCN.2002.1045848
T. Kanter
{"title":"Extensible mobile presence","authors":"T. Kanter","doi":"10.1109/MWCN.2002.1045848","DOIUrl":"https://doi.org/10.1109/MWCN.2002.1045848","url":null,"abstract":"Presence is regarded as an important enabler for novel services in third-generation wireless networks (3G) (e.g, instant messaging). Standardization in 3GPP has adopted the IETF model for presence but integrated it into 3G service reachability and control support. Similarly, alternative approaches (e.g., Wireless Village or Messenger/.NET) restrict the user's use of presence in other ways. The paper examines some fundamental properties of mobile presence, what support is available for mobile presence, and limitations caused by this support. Finally, I present an alternative user-centric approach, with an extensible mobile presence which is operator and provider independent, that removes these previous limitations.","PeriodicalId":323344,"journal":{"name":"4th International Workshop on Mobile and Wireless Communications Network","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130911066","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: 4
Link cache extensions for predictive routing and repair in ad hoc wireless networks 用于预测路由和自组织无线网络修复的链路缓存扩展
4th International Workshop on Mobile and Wireless Communications Network Pub Date : 2002-12-10 DOI: 10.1109/MWCN.2002.1045695
A. J. Cahill, Phillip L. De Leon, C. Sreenan
{"title":"Link cache extensions for predictive routing and repair in ad hoc wireless networks","authors":"A. J. Cahill, Phillip L. De Leon, C. Sreenan","doi":"10.1109/MWCN.2002.1045695","DOIUrl":"https://doi.org/10.1109/MWCN.2002.1045695","url":null,"abstract":"In ad hoc networks that employ source-based on-demand routing protocols, network nodes can use information contained in packet headers to populate a link cache. Given sufficient route requests and network traffic, a link cache can provide a good view of the past spatial network topology. This view can be successfully applied to making future routing decisions, provided that links are allowed to expire through a timeout mechanism, so that the cache stays fresh. We further assume that each node has the ability to determine its location, velocity, and bearing. We propose a link timeout mechanism that is based on mobility prediction, and introduce link cache extensions that incorporate temporal information regarding the future state of the network topology. By utilizing spatial and temporal information, better and more efficient routing decisions can be made. Furthermore, local repairs can be initiated preemptively in anticipation of a link break.","PeriodicalId":323344,"journal":{"name":"4th International Workshop on Mobile and Wireless Communications Network","volume":"39 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127461861","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: 10
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