发布求助
文献互助 智能选刊 最新文献

2006 1st International Symposium on Wireless Pervasive Computing最新文献

筛选
英文 中文
Transmit diversity systems with antenna replacement and its application to space time block coding transmission 天线替换发射分集系统及其在空时分组编码传输中的应用
2006 1st International Symposium on Wireless Pervasive Computing Pub Date : 2006-04-10 DOI: 10.1109/ISWPC.2006.1613602
Seyeong Choi, Hong-Chuan Yang, Young-Chai Ko
{"title":"Transmit diversity systems with antenna replacement and its application to space time block coding transmission","authors":"Seyeong Choi, Hong-Chuan Yang, Young-Chai Ko","doi":"10.1109/ISWPC.2006.1613602","DOIUrl":"https://doi.org/10.1109/ISWPC.2006.1613602","url":null,"abstract":"We propose a new closed-loop transmit diversity scheme for MIMO systems based on orthogonal space-time block coding (OSTBC). The receiver of the proposed scheme checks the output signal-to-noise ratio (SNR) of the space-time decoder against an output threshold and requests the transmitter to replace the antenna corresponding to the weakest path with an unused one if the output SNR is below the threshold. We provide some interesting statistical analysis and obtain closed-form expressions for the cumulative distribution function (CDF), the probability density function (PDF), and the moment generating function (MGF) of the received SNR. We show through numerical examples that the proposed scheme offers significant performance gain with very minimal feedback load over existing open-loop MIMO diversity systems and its performance is commensurate with more complicated systems such as transmit generalized selection combining (GSC).","PeriodicalId":145728,"journal":{"name":"2006 1st International Symposium on Wireless Pervasive Computing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115284988","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
An Adaptive Frequency Hopping Method in the Bluetooth Baseband 一种蓝牙基带自适应跳频方法
2006 1st International Symposium on Wireless Pervasive Computing Pub Date : 2006-04-10 DOI: 10.1109/ISWPC.2006.1613638
Sangook Moon
{"title":"An Adaptive Frequency Hopping Method in the Bluetooth Baseband","authors":"Sangook Moon","doi":"10.1109/ISWPC.2006.1613638","DOIUrl":"https://doi.org/10.1109/ISWPC.2006.1613638","url":null,"abstract":"In Bluetooth version 1.0, the frequency to be shared has been resolved by the specific part of the digits of the Device clock and the Bluetooth address in the given piconet. Basic pattern was a kind of pseudo-random fashion using 79 frequencies in the ISM band. At this point, a problem might occur if there were more than two devices using the same frequency within the shared range. In this paper, we proposed a software-based adaptive frequency hopping method so that more than two wireless devices can stay connected without frequency collision. Suggested method was implemented with HDL (Hardware Description Language) and automatically synthesized and laid out. The adaptive frequency hopping circuit was implemented in a prototype and showed its operation at 24mHz correctly.","PeriodicalId":145728,"journal":{"name":"2006 1st International Symposium on Wireless Pervasive Computing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124955295","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
Scalable broadcast strategies for ad hoc routing protocols 自组织路由协议的可扩展广播策略
2006 1st International Symposium on Wireless Pervasive Computing Pub Date : 2006-04-10 DOI: 10.1109/ISWPC.2006.1613593
N. Wisitpongphan, O. Tonguz
{"title":"Scalable broadcast strategies for ad hoc routing protocols","authors":"N. Wisitpongphan, O. Tonguz","doi":"10.1109/ISWPC.2006.1613593","DOIUrl":"https://doi.org/10.1109/ISWPC.2006.1613593","url":null,"abstract":"In ad hoc wireless networks, routes are discovered either by means of a periodic update between 1-hop neighbors or by using a reactive routing protocol which relies on an explicit route discovery process. Although the major advantage of a reactive protocol is the reduction in the routing overhead, the conventional flooding mechanism used to propagate the route request (RREQ) message during the route discovery process does not scale well to large networks. In addition to the overhead problem, the way in which the route request gets propagated across the network affects the network performance in two different ways: (i) it determines how fast the route can be acquired; (ii) it is also an important factor in determining the availability and quality of the route. In this paper, we propose three novel RREQ broadcast techniques, i.e., weighted p-persistence, slotted p-persistence, and slotted p-persistence schemes. Our simulation results show that the proposed schemes can achieve up to 75% routing overhead reduction while keeping the route acquisition delay close or equal to the conventional flooding scheme.","PeriodicalId":145728,"journal":{"name":"2006 1st International Symposium on Wireless Pervasive Computing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116520393","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: 18
Recognition of 24 Thai spoken Vowels Using the coefficients of 3rdOrder Polynomial Regression on the Voice Energy and Spectrum of LPC on the Bark Scale 基于树皮尺度上LPC语音能量和频谱的3阶多项式系数识别24个泰语语音元音
2006 1st International Symposium on Wireless Pervasive Computing Pub Date : 2006-04-10 DOI: 10.1109/ISWPC.2006.1613615
K. Songwatana, S. Sriratanapaprat, P. Kultap, K. Sittiprasert, N. Suktangman
{"title":"Recognition of 24 Thai spoken Vowels Using the coefficients of 3rdOrder Polynomial Regression on the Voice Energy and Spectrum of LPC on the Bark Scale","authors":"K. Songwatana, S. Sriratanapaprat, P. Kultap, K. Sittiprasert, N. Suktangman","doi":"10.1109/ISWPC.2006.1613615","DOIUrl":"https://doi.org/10.1109/ISWPC.2006.1613615","url":null,"abstract":"This paper presents a vowel recognition for Thai spoken language. The Thai language consists of 9 short unmixed vowels (a, i,ω,u, o, e, ε, γ, [unk]); 9 long unmixed vowels (aa, ii, ωω, uu, oo, ee, £ εε, γγ, [unk][unk]); 3 short mixed vowels (ia, ωa, ua); and 3 long mixed vowels (i:a:, ω:a:, u:a:). We proposed uses 3-stage decision making: step 1 distinguishes long and short vowels using coefficients of third order polynomial regression of signal energy as features set and 5-NN as classification method; step 2 classifies each voice segment (frame) into 9 basic vowels using 18 critical band intensities as feature set and 9-NN as classification method; finally step 3 decides whether each frame contains mixed or unmixed vowel via thresholding method. This solution is different from the conventional speech recognition mainly because decision making in this method is done for each frame, while conventional speech recognition chooses the best decision for a sequence of frames forming a word or a sentence. Evaluation is done by applying the algorithm to 3024 voice samples of male and female subjects. Each step of the algorithm is evaluated successively.","PeriodicalId":145728,"journal":{"name":"2006 1st International Symposium on Wireless Pervasive Computing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115783925","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
Performance enhancement of an MB/spl I.bar/OFDM based UWB system in multiple SOPs environments 多sop环境下基于MB/spl I.bar/OFDM的超宽带系统的性能增强
2006 1st International Symposium on Wireless Pervasive Computing Pub Date : 2006-04-10 DOI: 10.1109/ISWPC.2006.1613569
Peng Gong, Peng Xue, Jae Sung Lee, D. Kim
{"title":"Performance enhancement of an MB/spl I.bar/OFDM based UWB system in multiple SOPs environments","authors":"Peng Gong, Peng Xue, Jae Sung Lee, D. Kim","doi":"10.1109/ISWPC.2006.1613569","DOIUrl":"https://doi.org/10.1109/ISWPC.2006.1613569","url":null,"abstract":"In this paper, we propose a new transmission scheme to support multiple simultaneously operating piconets (SOPs) in an ultra wideband (UWB) system based on multi-band orthogonal frequency division multiplexing (MB/spl I.bar/OFDM), where the code division technique is combined with the MB/spl I.bar/OFDM. When there are 2 or 3 SOPs, the collision between different piconets is increased and the average probabilities of symbol collision increase up to nearly 55.7% and 70.7%, respectively. Hence, the previous scheme using symbol repeater and erasure can't effectively reduce the co-channel interference (CCI). We propose to use the MC/spl I.bar/CDMA to mitigate the CCI from 2 and 3 SOPs. Our simulation results demonstrate that the proposed scheme is effective in multiple SOPs.","PeriodicalId":145728,"journal":{"name":"2006 1st International Symposium on Wireless Pervasive Computing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115655719","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
Power law property and self-organization in hybrid ad hoc wireless networks 混合自组织无线网络的幂律性质与自组织
2006 1st International Symposium on Wireless Pervasive Computing Pub Date : 2006-04-10 DOI: 10.1109/ISWPC.2006.1613592
E. Yanmaz, O. Tonguz, S. Dixit
{"title":"Power law property and self-organization in hybrid ad hoc wireless networks","authors":"E. Yanmaz, O. Tonguz, S. Dixit","doi":"10.1109/ISWPC.2006.1613592","DOIUrl":"https://doi.org/10.1109/ISWPC.2006.1613592","url":null,"abstract":"Scale-free property, or what is more commonly referred to as power law node degree distribution, has been observed within several natural and man-made self-organizing complex systems such as the Internet, World Wide Web (WWW), social networks, biological systems, etc. While reasons behind the power law degree distribution, especially in the context of the topology of the Internet, have been explored extensively, and several models to generate topologies that govern the power law property have been proposed, the relationship between the scale-free property and the self-organizing nature of these complex systems has not been clarified yet. In this paper, we explore if scale-free property (also known as power law) is a necessary condition for self-organization, and as a case study, we investigate if the topology of self-organizing wireless networks follow a power law.","PeriodicalId":145728,"journal":{"name":"2006 1st International Symposium on Wireless Pervasive Computing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116059258","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
A new route maintenance in dynamic source routing protocol 动态源路由协议中一种新的路由维护方法
2006 1st International Symposium on Wireless Pervasive Computing Pub Date : 2006-04-10 DOI: 10.1109/ISWPC.2006.1613654
Ashish Shukla, Neeraj Tyagi
{"title":"A new route maintenance in dynamic source routing protocol","authors":"Ashish Shukla, Neeraj Tyagi","doi":"10.1109/ISWPC.2006.1613654","DOIUrl":"https://doi.org/10.1109/ISWPC.2006.1613654","url":null,"abstract":"Mobile ad-hoc network (MANET) is infrastructureless, self-organizable, multi hop packet switched network. A number of routing protocols for MANETs have been proposed in recent years. Dynamic source routing (DSR) protocol is one of the most popular routing protocol for ad hoc networks. This paper presents a novel method to enhance route maintenance part of DSR protocol. Our proposed route maintenance significantly increases the efficiency of the protocol at the time of route failures.","PeriodicalId":145728,"journal":{"name":"2006 1st International Symposium on Wireless Pervasive Computing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121408948","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: 23
Defining an Optimized Management Protocol for Next Generation Packet Networks 定义下一代分组网络的优化管理协议
2006 1st International Symposium on Wireless Pervasive Computing Pub Date : 2006-04-10 DOI: 10.1109/ISWPC.2006.1613662
J. Sathyan, N. Unni, S. Kantichandra, P. Gopinath
{"title":"Defining an Optimized Management Protocol for Next Generation Packet Networks","authors":"J. Sathyan, N. Unni, S. Kantichandra, P. Gopinath","doi":"10.1109/ISWPC.2006.1613662","DOIUrl":"https://doi.org/10.1109/ISWPC.2006.1613662","url":null,"abstract":"Traditionally SNMP has been the preferred protocol for Management in older generation packet networks like Ethernet, Token-ring etc. Efficient, low-bandwidth transport mechanisms (UDP over IP) as well an optimized, but limited, data model were the 2 main reasons for its popularity. The simplistic data model architecture used by SNMP (a flat MIB definition) was well suited for low complexity legacy packet nodes. There are many protocols which have arisen in the past few years to address the Management requirements of Next-generation nodes based on CIM, WBEM management framework. But these rely on TCP as the transport protocol making it not the optimal solution for low bandwidth and intermittent packet networks. This paper proposes a management protocol based on XMLP which would serve to address the scenario described above. The paper also proposes a Management Framework which could be used to seamlessly transition the management of Legacy SNMP nodes to this new protocol.","PeriodicalId":145728,"journal":{"name":"2006 1st International Symposium on Wireless Pervasive Computing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125760933","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 Viterbi decoder with low-power trace-back memory structure for wireless pervasive communications 一种用于无线普适通信的低功耗回溯存储器结构的维特比解码器
2006 1st International Symposium on Wireless Pervasive Computing Pub Date : 2006-04-10 DOI: 10.1109/ISWPC.2006.1613572
P. Israsena, I. Kale
{"title":"A Viterbi decoder with low-power trace-back memory structure for wireless pervasive communications","authors":"P. Israsena, I. Kale","doi":"10.1109/ISWPC.2006.1613572","DOIUrl":"https://doi.org/10.1109/ISWPC.2006.1613572","url":null,"abstract":"This paper presents a new trace-back memory structure for Viterbi decoders that reduces power consumption by 63% compared to the conventional RAM based design. Instead of the intensive read and write operations as required in RAM based designs, the new memory is based on an array of registers connected with trace-back signals that decode the output bits on the fly. The structure is used together with appropriate clock and power-aware control signals. Based on a 0.35 /spl mu/m CMOS implementation the trace-back back memory consumes energy of 182 pJ.","PeriodicalId":145728,"journal":{"name":"2006 1st International Symposium on Wireless Pervasive Computing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115973176","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
Structuring proactive secret sharing in mobile ad-hoc networks 构建移动自组织网络中的主动秘密共享
2006 1st International Symposium on Wireless Pervasive Computing Pub Date : 2006-04-10 DOI: 10.1109/ISWPC.2006.1613620
H. Asaeda, M. Rahma, Y. Toyama
{"title":"Structuring proactive secret sharing in mobile ad-hoc networks","authors":"H. Asaeda, M. Rahma, Y. Toyama","doi":"10.1109/ISWPC.2006.1613620","DOIUrl":"https://doi.org/10.1109/ISWPC.2006.1613620","url":null,"abstract":"Threshold cryptography is a novel cryptographic technique sharing secret among members. It divides a secret key into multiple shares by a cryptographic operation. This technique is useful to provide a shared secret key to legitimate nodes in a infrastructure-less mobile ad-hoc network (MANET). As an additional component, proactive secret sharing (PSS) allows a set of nodes holding shares to refresh all shares by generating a new set of shares for the same secret key from the old shares without reconstructing the secret key. It is necessary to reasonably escape from threats of exposing the secret key when threshold cryptography is used. In this paper, we design the PSS protocol implementation specification in a MANET environment. In our scheme all share holder nodes synchronize the PSS procedure in a well-managed fashion to keep the protocol consistency. We then introduce our actual implementation and evaluate the behavior and its performance criteria.","PeriodicalId":145728,"journal":{"name":"2006 1st International Symposium on Wireless Pervasive Computing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116463996","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信