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The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.最新文献

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Concept of time varying binary symmetric model-channel uncertainty modeling 时变二元对称模型的概念——信道不确定性建模
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359447
Z. Krusevac, P. Rapajic, R. Kennedy
{"title":"Concept of time varying binary symmetric model-channel uncertainty modeling","authors":"Z. Krusevac, P. Rapajic, R. Kennedy","doi":"10.1109/ICCS.2004.1359447","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359447","url":null,"abstract":"In this paper, we develop the concept of time varying binary symmetric channel (TV-BSC) model, a basic model that shows a non-trivial influence on capacity due to the channel uncertainty and characterizes the important attributes of more general time varying mobile communications channels. That an influence of the channel uncertainty is captured serves to significantly differentiate the model from other two-state Markov models, especially from the Gilbert-Elliott model. We use several methods to calculate the information capacity of the TV-BSC. Furthermore, we find accurate approximations for the TV-BSC information capacity, providing better inside into the capacity analysis of general time varying communications channels. Finally, we present the generalization on the TV-BSC model and the concept of the communication channel with time varying memory to further confirm the uniqueness of the model","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115228560","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: 3
Resilient ethernet ring for metropolitan area networks 用于城域网的弹性以太网环
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359390
Ziwen Lian, W. Zhong, S. Bose, Yixin Wang
{"title":"Resilient ethernet ring for metropolitan area networks","authors":"Ziwen Lian, W. Zhong, S. Bose, Yixin Wang","doi":"10.1109/ICCS.2004.1359390","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359390","url":null,"abstract":"This paper presents a new resilient Ethernet ring (RER) approach to allow the Ethernet to be operated in ring topologies for transporting data in metropolitan area networks (MANs). Developed based on standard Ethernet datalink switching technology, RER is simple and data-efficient. The ring topology simplifies the decision-making process for frame forwarding and also enables the RER to recover from failure within 50 ms. Simulations show that RER transports data efficiently in MANs","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128624559","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
Architecture and rate control for network TV broadcasting on application-oriented QOS 面向应用的QOS网络电视广播体系结构与速率控制
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359335
H. Xiong, Chuanfei Luo, Songyu Yu, Jun Sun
{"title":"Architecture and rate control for network TV broadcasting on application-oriented QOS","authors":"H. Xiong, Chuanfei Luo, Songyu Yu, Jun Sun","doi":"10.1109/ICCS.2004.1359335","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359335","url":null,"abstract":"This paper addresses the implementation architecture and protocol procedure of the dedicated broadband network TV broadcast system. According to application-oriented quality of service (QoS), two alternative rate control schemes for multiple DTV programs transmission are proposed collaborating with MPEG-2 system strategy and IP-base network multiplexing mechanism. As to the network bandwidth utilization, a flexible RTF-based encapsulation scheme for VBR transport stream (TS) transmission is realized to ensure the time synchronization requirement for MPEG-2 standard. As to the statistical multiplexing gain, moreover, a parallel VBR transcoding/encoding rate control algorithm for CBR TS transmission could achieve a consistent picture quality for multiple DTV programs under a constrained network bandwidth. For adapting the variable access network bandwidth, the system main control module can flexibly schedule the available rate control scheme for multiple slave service multiplexers","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124261662","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
Residual image coding using a SPIHT-based video coder 残差图像编码使用基于spiht的视频编码器
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359372
Yap Wee Hau, A. Kassim, Lee Wei Siong
{"title":"Residual image coding using a SPIHT-based video coder","authors":"Yap Wee Hau, A. Kassim, Lee Wei Siong","doi":"10.1109/ICCS.2004.1359372","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359372","url":null,"abstract":"This paper describes the design and implementation of a block-based set partitioning in hierarchical trees (SPIHT) coder which is capable of encoding residual images in low bit-rate video coding. Unlike the SPIHT coder which encodes an entire image frame, the new algorithm encodes the subdivided image regions (16times16 blocks) differentially based on an optimization bit allocation strategy. Instead of applying DWT to the whole image, it is applied separately on each partitioned block of the original image and, depending on the statistics of each image region, the number of wavelet coefficients to be retained is determined. Our experiments show that the proposed block-based SPIHT coder (BSC) performs better than SPIHT in terms of PSNR (objective criteria) & visual perception quality (subjective criteria)","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"2 S1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113964954","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
Design of a non-data-aided differential-QAM modem for real-time speech communication: a software-defined-radio PC-based approach 用于实时语音通信的非数据辅助差分qam调制解调器的设计:一种基于软件定义无线电pc机的方法
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359371
Jeng-Kuang Hwang, Yu-Lun Chiu, R. Chung
{"title":"Design of a non-data-aided differential-QAM modem for real-time speech communication: a software-defined-radio PC-based approach","authors":"Jeng-Kuang Hwang, Yu-Lun Chiu, R. Chung","doi":"10.1109/ICCS.2004.1359371","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359371","url":null,"abstract":"In this paper, a non-data-aided differential-QAM (NDA-DQAM) system is proposed to solve the phase ambiguity problem which arises in continuous speech transmission. Moreover, the system design and test are done by the software-defined radio (SDR) approach which is based only on the PC soundcard and Matlabreg software for a minimum-cost implementation of the NDA-DQAM system. In so doing, first, the speech signal is converted into bit stream by the adaptive delta modulation. Then using two differential angles mapped by Gray-coded dibits, a passband 16-DQAM waveform can be generated. It is shown that the 16-DQAM system incurs only about 0.5-dB performance degradation as compared to the coherent 16-QAM system. With the SDR approach, all the system parameters and TX/RX algorithms are embodied in high-level Matlab programs. A free-running T/2-spaced receiver structure is especially used with interpolation-based timing recovery and Costas carrier synchronization. Finally, experimental results are included to show how real-time speech transmission can be readily achieved. Hence this paper also suggest an efficient and cost-effective approach to teach a design-oriented communication lab course","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114843306","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
Efficient methods for inductance calculation with non-uniform current distribution in spiral inductor 非均匀电流分布下螺旋电感的有效计算方法
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359442
O. B. Leong, Xu Daoxian
{"title":"Efficient methods for inductance calculation with non-uniform current distribution in spiral inductor","authors":"O. B. Leong, Xu Daoxian","doi":"10.1109/ICCS.2004.1359442","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359442","url":null,"abstract":"Two efficient methods of inductance calculations for spiral inductor with special emphasis on the non-uniform current distribution on the metallic trace are presented. Based on the conventional magnetic flux method and the energy method, a unified approach for modeling the eddy current and skin depth of the spiral inductor has been presented. Our proposed method is validated with experimental results, and good agreement has been obtained","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116058017","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
TBF-based multipath tolerant routing for sensor networks 基于tbf的传感器网络多径容错路由
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359342
Zhang Jin, Lin Ya-ping, Xia Wei, Li Ping, Li Wen
{"title":"TBF-based multipath tolerant routing for sensor networks","authors":"Zhang Jin, Lin Ya-ping, Xia Wei, Li Ping, Li Wen","doi":"10.1109/ICCS.2004.1359342","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359342","url":null,"abstract":"In sensor networks, the bad working conditions make nodes have high failure probabilities, so the routing algorithms must be able to recover from failure of nodes. And multipath is a method-to resolve it. In this paper, we propose a new algorithm to construct multipath based on TBF (trajectory-based forwarding) which was proposed as a middle-ground between source-based routing and greedy forwarding techniques. And it is very easy to construct disjoint or braided multipath. And we also evaluate the performance in isolated or patterned failure mode","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114725077","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
Handling the inter-vehicular communications challenge - a survey 应对车际通信挑战——一项调查
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359344
B. Selvaretnam, K. Wong
{"title":"Handling the inter-vehicular communications challenge - a survey","authors":"B. Selvaretnam, K. Wong","doi":"10.1109/ICCS.2004.1359344","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359344","url":null,"abstract":"Inter-vehicle ad-hoc (IVC) networks are highly volatile due to high mobility rates of vehicles and varying driver behavior. A significant challenge in IVC networks would be the implementation of suitable routing protocols so as to ensure successful data packet delivery and lower packet delivery delay. IVC networks are subject to several limitations such as fragmentation of the network due to low deployment of ITS in-vehicle systems and low vehicle density. The rapidly changing topology would cause links between vehicles to be less reliable than those in traditional mobile ad hoc networks. This paper frames the issues and then surveys recent work done in this field, including routing protocol studies and research on network architectures making use of fixed roadside gateways","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121815510","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: 17
Allocating codes with coding scheme jointly to improve the system throughput of OVSF-CDMA systems 采用编码方案共同分配码，提高OVSF-CDMA系统的系统吞吐量
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359337
Ning Li, T. Yum
{"title":"Allocating codes with coding scheme jointly to improve the system throughput of OVSF-CDMA systems","authors":"Ning Li, T. Yum","doi":"10.1109/ICCS.2004.1359337","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359337","url":null,"abstract":"In this paper the error-control coding scheme is considered jointly with codes allocation in OVSF-CDMA systems. In CDMA systems, the multiple access interference limits the number of active users and their transmission rates, which in turn limit the system throughput. The resource has low utilization in most time. The error-control coding scheme can correct some transmission errors at the cost of low coding efficiency. Coding scheme tolerates the multiple access interference even when more users are active. With a proper combination of coding scheme and codes allocation, it is possible to admit more users and to achieve higher system throughput. A traffic scheduling algorithm based on this joint design scheme is proposed for constant rate services in OVSF-CDMA systems. In simulation we compare the system throughput of our joint design algorithm with those of two conventional algorithms, the algorithm adapting the codes allocation only and the algorithm adapting the coding scheme only. It shows the joint design algorithm achieves the highest system throughput","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122123030","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
Differentiated services supported by bandwidth guarantee polling (BGP) scheme in ethernet passive optical networks 以太网无源光网络中BGP (bandwidth guarantee polling)支持的差异化业务
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359401
Yongqing Zhu, M. Ma, T. Cheng
{"title":"Differentiated services supported by bandwidth guarantee polling (BGP) scheme in ethernet passive optical networks","authors":"Yongqing Zhu, M. Ma, T. Cheng","doi":"10.1109/ICCS.2004.1359401","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359401","url":null,"abstract":"Ethernet passive optical network (EPON) has been considered the best choice for access networks. Since EPON is supposed to deliver different types of traffic, supporting differentiated services in EPON becomes an important issue. This paper discusses how the differentiated services can be provided by medium access control (MAC) protocol in EPON. We combine the bandwidth guarantee polling (BGP) scheme with the strict priority scheduling specified by IEEE 802.1D to support differentiated services. The simulation results show that our proposed technique can effectively provide differentiated services to different classes of traffic in the EPON","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123664780","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
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