2010 The 5th Annual ICST Wireless Internet Conference (WICON)最新文献

On the impact of primary user localization on rate performance of CR systems 主用户定位对CR系统速率性能的影响

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8683

N. Mahmood, M. Brandt-Pearce, G. Øien

引用次数: 2

Distribution of peak-to-average power ratio and its applications in OFDM systems with unequal power allocation 功率分配不均匀的OFDM系统的峰均比分布及其应用

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8618

Tao Jiang, Daiming Qu, Peng Gao

引用次数: 5

Resource allocation and reuse for inter-cell interference mitigation in OFDMA based communication networks 基于OFDMA的通信网络中小区间干扰抑制的资源分配与重用

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8489

Zheng Xie, B. Walke

{"title":"Resource allocation and reuse for inter-cell interference mitigation in OFDMA based communication networks","authors":"Zheng Xie, B. Walke","doi":"10.4108/ICST.WICON2010.8489","DOIUrl":"https://doi.org/10.4108/ICST.WICON2010.8489","url":null,"abstract":"Inter-cell interference (ICI) mitigation is always a big challenge issue in cellular systems. In this work we propose an Enhanced Fractional Frequency Reuse (EFFR) scheme with an interference-aware reuse mechanism to achieve not only ICI limitation at cell edge but also enhancement of overall cell capacity in orthogonal frequency division multiple access (OFDMA) based communication networks. The EFFR scheme divides the whole available bandwidth into a Primary Segment and a Secondary Segment. The exclusive reuse-3 subchannels in the Primary Segment will be preferentially used by cell-edge users with higher transmission power, whereas the remaining subchannels are all reuse-1 subchannels allowing to be used with lower power. In addition, the resources in the Secondary Segment will be occupied by means of signal-to-interference-ratio (SINR) estimation. We implement the proposed EFFR scheme in a system-level simulator OpenWNS and compare its performance with the well-known Incremental Frequency Reuse (IFR) scheme, the classical reuse-1 and reuse-3 schemes. In order to reach a reliable evaluation, schemes are simulated with individual power masks, and using a scenario with surrounding cells up to 2nd-tier. The simulation results show that with the usage of the EFFR scheme substantial improvements in both, the overall cell capacity as well as the cell-edge user performance can be gained.","PeriodicalId":111317,"journal":{"name":"2010 The 5th Annual ICST Wireless Internet Conference (WICON)","volume":"749 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122967981","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: 34

An enhanced bridged-based multi-hop wireless network implementation 一种增强的基于桥接的多跳无线网络实现

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8510

Stefano Maurina, J. Fitzpatrick, L. Trifan, L. Murphy

{"title":"An enhanced bridged-based multi-hop wireless network implementation","authors":"Stefano Maurina, J. Fitzpatrick, L. Trifan, L. Murphy","doi":"10.4108/ICST.WICON2010.8510","DOIUrl":"https://doi.org/10.4108/ICST.WICON2010.8510","url":null,"abstract":"In this paper an enhanced Layer-2 multi-hop wireless network implementation for Infrastructure based Wireless Mesh Networks is presented. This work combines the flexibility of Layer-2 Wireless Bridging with the dynamic self-configuring capabilities of MANET routing. The main contribution of this paper is an investigation of the issues encountered when applying a pure bridging based solution to wireless multi-hop networks and the development of several mechanisms to overcome these problems. This work was implemented and deployed in a real testbed environment using Routerboard hardware and utilising a number of open-source network tools in accordance with the needs of our platform. The developed testbed incorporates self-healing and self-configuration features without requiring a traditional MANET routing protocol. Instead the 802.11 beacon frames sent by the Access Points were extended with link information to allow optimal construction of the mesh topology. Results are presented which demonstrate the automated topology construction mechanism. Further results also show the enhancements made to the normal 802.11 Layer-2 mobility mechanism.","PeriodicalId":111317,"journal":{"name":"2010 The 5th Annual ICST Wireless Internet Conference (WICON)","volume":"94 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113988231","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

Distributed management of contextual affinities in context-aware systems 上下文感知系统中上下文关联的分布式管理

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8517

R. Schmohl, U. Baumgarten

引用次数: 0

Location optimization for decode-and-forward opportunistic cooperative networks 译码转发机会合作网络的位置优化

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8546

Changqing Yang, Wenbo Wang, Shuang Zhao, M. Peng

引用次数: 5

On infostation density of vehicular networks 车联网信息站点密度研究

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8533

Vinod Kone, Haitao Zheng, A. Rowstron, Ben Y. Zhao

{"title":"On infostation density of vehicular networks","authors":"Vinod Kone, Haitao Zheng, A. Rowstron, Ben Y. Zhao","doi":"10.4108/ICST.WICON2010.8533","DOIUrl":"https://doi.org/10.4108/ICST.WICON2010.8533","url":null,"abstract":"Vehicle-to-Vehicle and Vehicle-to-Roadside communications are going to become an indispensable part of the modern day automotive experience. For people on the move, vehicular networks can provide critical network connectivity and access to real-time information. Infestations play a vital role in these networks by acting as gateways to the Internet and by extending network connectivity. In this context, an important question is \"What is the minimum number of infestations that need to be deployed in an area in order to support vehicular applications?\" Optimizing infostation density is vital to understanding and reducing the cost of deployment and management. In this paper, we examine the required infostation density in a highway scenario using different data dissemination models. We start from a simple analysis that captures the required density under idealized assumptions. We then run detailed QualNet simulations on both controlled and realistic vehicular traces to observe the information density trends in practical environments, and consequently propose techniques to improve dissemination performance and reduce the required infostation density.","PeriodicalId":111317,"journal":{"name":"2010 The 5th Annual ICST Wireless Internet Conference (WICON)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117087178","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: 15

Relay-assisted MIMO transmission with three-phase scheduling in cognitive radio networks 认知无线电网络中中继辅助MIMO三相调度传输

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8620

Sen Shao, Qing-min Meng, Wenhui Zong, Weiping Zhu

{"title":"Relay-assisted MIMO transmission with three-phase scheduling in cognitive radio networks","authors":"Sen Shao, Qing-min Meng, Wenhui Zong, Weiping Zhu","doi":"10.4108/ICST.WICON2010.8620","DOIUrl":"https://doi.org/10.4108/ICST.WICON2010.8620","url":null,"abstract":"In this paper, we investigate a joint scheduling and transmitting scheme in cognitive radio networks. Three phases are considered in the proposed scheme(named scheme 1): l)in the first phase, JVt primary users(PUs) in the high-rate region are chosen to implement communication with primary base station (PBS); 2)in the second phase, PBS will support simultaneously the fixed relay station(RS) and the selected PUs in the high-rate region based on certain beamforming(BF); 3)in the third phase, selected PUs in the low-rate region and selected cognitive users(CUs) in the cognitive region are supported by RS. In particular, during the phases above, all selected users send back their channel covariance matrices to PBS or RS on the purpose of lowering the feedback and implementing certain BE Furthermore, a frame structure used for the joint scheduling and transmitting scheme is presented and the performance of scheme 1 with imperfect channel covariance matrix feedback is evaluated to compare with that of scheme 1 with perfect feedback. From the simulation results, the proposed scheme(scheme 1) can significantly improve the throughput of the network over the basic system(named scheme 2) without spectral sharing.","PeriodicalId":111317,"journal":{"name":"2010 The 5th Annual ICST Wireless Internet Conference (WICON)","volume":"54 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116781659","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: 1

A Distance-Aware Forwarding protocol for beaconless communication in mobile ad hoc networks and its performance 移动自组织网络中无信标通信的距离感知转发协议及其性能

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8513

Keiichi Endo, Yusuke Inoue, Yutaka Takahashi

{"title":"A Distance-Aware Forwarding protocol for beaconless communication in mobile ad hoc networks and its performance","authors":"Keiichi Endo, Yusuke Inoue, Yutaka Takahashi","doi":"10.4108/ICST.WICON2010.8513","DOIUrl":"https://doi.org/10.4108/ICST.WICON2010.8513","url":null,"abstract":"Recently, routing protocols for Mobile Ad hoc NET-works (MANETs) which use position information to improve their efficiency have been actively studied. In this paper, we focus on Beacon-Less Routing algorithm (BLR) and propose a new forwarding algorithm that improves BLR and analyze its performance. BLR is efficient to reduce redundancy in its transmissions for flooding. When a node receives a packet, a time variable referred to as deferring time is calculated using the positions of the sender, the receiver, and the final destination of the packet. Each node forwards the packet after this deferring time unless it notices that another node forwards the same packet during the deferring time. As a result, only the node that is assigned the shortest deferring time forwards the packet. It is necessary to make this deferring time as short as possible in order to reduce the total deferring time in a multi-hop transmission. In order to evaluate our approach named Distance-Aware Forwarding (DAF), we carry out a performance analysis. Numerical results demonstrate that the proposed approach reduces the total deferring time in a multi-hop transmission, although the number of hops slightly increases.","PeriodicalId":111317,"journal":{"name":"2010 The 5th Annual ICST Wireless Internet Conference (WICON)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125573161","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

Distributed mobility management based on flat network architecture 基于扁平网络架构的分布式移动管理

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8728

Liu Yu, Zhijun Zhao, Lin Tao, Hui Tang

引用次数: 15