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Real-time voice quality guarantee on the IP based networks 基于IP网络的实时语音质量保证
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182528
S. El-kader, H. S. Eissa, H. Baraka
{"title":"Real-time voice quality guarantee on the IP based networks","authors":"S. El-kader, H. S. Eissa, H. Baraka","doi":"10.1109/ICCS.2002.1182528","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182528","url":null,"abstract":"A new proposed model has been implemented to guarantee the required voice quality based on the available network resources. Although, the proposed model is so simple from the routers side, it is somehow complex from the host side due to the input analyzing process. On the other hand, the QBone (quality of service backbone) model moves the complexity to the router side. Practically, the QBone model does not face any success because most of the users are not willing to pay much money to have voice sessions across the Internet. So, the proposed model not only guarantees the voice quality but also saves the network resources (up to 74% of the consumed bandwidth).","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124297424","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 improved code rate search scheme for adaptive multicode CDMA 一种改进的自适应多码CDMA码率搜索方案
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183303
Y. Cai, Ho. Pkm, W. Wong
{"title":"An improved code rate search scheme for adaptive multicode CDMA","authors":"Y. Cai, Ho. Pkm, W. Wong","doi":"10.1109/ICCS.2002.1183303","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183303","url":null,"abstract":"This paper presents an improved scheme to maximize system throughput through joint rate and power adaptation with perfect channel information in a multicode CDMA system. By specifying suitable boundary conditions, the search range can be narrowed down thereby significantly improving search complexity.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128074505","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
An improved traffic modeling scheme for MPEG video over content delivery networks 一种改进的内容分发网络上MPEG视频流量建模方案
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183224
Chu-Chuan Lee, Chin-Wei Lin, P. Chang
{"title":"An improved traffic modeling scheme for MPEG video over content delivery networks","authors":"Chu-Chuan Lee, Chin-Wei Lin, P. Chang","doi":"10.1109/ICCS.2002.1183224","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183224","url":null,"abstract":"We propose an improved video traffic modeling scheme, delay-tolerant multi-leaky-bucket (DTMLB), for video streaming applications over the Internet. Based on the original multi-leaky-bucket modeling method (MLB), DTMLB parameterizes the actual traffic cumulative function instead of the empirical envelope function used by MLB. Moreover, DTMLB incorporates different delay tolerance characteristics among I-frames, P-frames, and B-frames of video to improve the overall bandwidth utilization. Simulation results show that DTMLB provides higher modeling accuracy and higher bandwidth utilization than the MLB and the peak rate modeling methods do. Furthermore, in our simulations, DTMLB generates the least burst traffic into the subsequent nodes of networks among all three methods tested.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115968657","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 optimized digital RFI cancellation scheme for DMT-based VDSL systems 基于dmt的VDSL系统的优化数字RFI取消方案
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182471
R. Locatelli, S. Brini, L. Fanucci, C. Del-Toso
{"title":"An optimized digital RFI cancellation scheme for DMT-based VDSL systems","authors":"R. Locatelli, S. Brini, L. Fanucci, C. Del-Toso","doi":"10.1109/ICCS.2002.1182471","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182471","url":null,"abstract":"In this paper a digital frequency domain RFI (radio frequency interference) cancellation scheme for DMT (discrete multitone) based VDSL (very high speed digital subscriber line) systems is presented. The proposed algorithm has been optimized and characterized in terms of complexity and performance. Optimizations were also performed from an implementation point of view by deducing key dependencies among our RFI model coefficients that let us drastically reduce the size of the memories involved. System simulations showed the effectiveness of the canceller. In terms of VDSL performance parameters such as bit rate, the optimized cancellation scheme recovers almost totally the performance degradation due to RFI.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130251980","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
Step-by-step error/erasure decoding Reed-Solomon codes 一步一步的错误/擦除解码里德-所罗门码
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182490
Tung-Chou Chen, Che-Ho Wei, Shyue-Win Wei
{"title":"Step-by-step error/erasure decoding Reed-Solomon codes","authors":"Tung-Chou Chen, Che-Ho Wei, Shyue-Win Wei","doi":"10.1109/ICCS.2002.1182490","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182490","url":null,"abstract":"A step-by-step error/erasure decoding algorithm for Reed-Solomon codes is presented. Compared with the standard algebraic decoding, this step-by-step error/erasure decoding algorithm does not need to find the coefficients of the error location polynomial, to search the error locators, and to calculate the error evaluator and error/erasure polynomials for obtaining the error and erasure values. This algorithm can detect whether each received code symbol is an error or erasure location or not and then directly find the corresponding error or erasure value in the manner of symbol-by-symbol.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130688974","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
Dynamic resource allocation algorithm for next generation wireless multimedia. services 下一代无线多媒体动态资源分配算法。服务
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183229
G. Sivaradje, P. Dananjayan
{"title":"Dynamic resource allocation algorithm for next generation wireless multimedia. services","authors":"G. Sivaradje, P. Dananjayan","doi":"10.1109/ICCS.2002.1183229","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183229","url":null,"abstract":"A predictive resource allocation scheme that provides high wireless network utilization is proposed by dynamically reserving only those resources that are needed. The algorithm exploits the structure of the MPEG video stream and allocates bandwidth on a scene basis, wherein the mobile users change their bandwidth requirement only for scene boundaries. This will result in a high bandwidth gain, which will improve the overall network performance. The proposed scheme is dynamic and also facilitates bandwidth management. It automatically adjusts the amount of reserved resources, while the required QoS are also guaranteed. The algorithm is simulated and evaluated using model encoded video data.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133318875","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
Bit error analysis of new generation wireless transceivers 新一代无线收发器的误码分析
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183204
A. Mitra
{"title":"Bit error analysis of new generation wireless transceivers","authors":"A. Mitra","doi":"10.1109/ICCS.2002.1183204","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183204","url":null,"abstract":"There has been a spurt of activity in the development of digital wireless transceivers especially those operating in the ISM (industry scientific medical) bands. This is attributed to the fact that wireless systems have become more reliable, compact and easy to develop than ever before, leading to a well-perceived ubiquity. Most manufacturers do not document the error related performance and characteristics of their devices, thus entailing a detailed analysis by the developer or the user. We highlight tests to measure the bit error related performance of these new generation transceivers, with special emphasis on the TRF 6900A transceiver from Texas Instruments, a popular binary FSK (frequency shift keying) device. The test bed consists of a wireless modem based on the transceiver, and a personal computer executing a 'C' language code for baseband control and data source-sink, in order to test the device in various configurations and conditions. Our test analyses bit error rate and tries to highlight its relationship to various parameters such as attenuation, interference, occlusions, and modulation index, which in turn helps to evaluate the performance of a wireless device. This method can be easily extended to evaluate various other similar wireless transceivers offered in the market.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"217 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132444052","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
Police radio for multimedia communications based on 800 MHz wireless trunking system and GPS techniques 基于800mhz无线集群系统和GPS技术的多媒体通信警用无线电
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182524
Minggang Ma, Xiao Jiao, X. Tan, Xu Chen
{"title":"Police radio for multimedia communications based on 800 MHz wireless trunking system and GPS techniques","authors":"Minggang Ma, Xiao Jiao, X. Tan, Xu Chen","doi":"10.1109/ICCS.2002.1182524","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182524","url":null,"abstract":"This paper describes a recently developed remote monitoring system, based on a combination of embedded computing, digital signal processing, wireless communications, GPS, and trunking system technologies. The system includes mini camera, portable mobile trunking radio installed inside each monitored vehicle and a central station located in police office. The trunking system we used is 800 MHz Motorola's TETRA system.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132565675","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
TCP FECN: a unified solution for wireless networks TCP FECN:无线网络的统一解决方案
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183243
R. Chawla, Sukumar Nandi
{"title":"TCP FECN: a unified solution for wireless networks","authors":"R. Chawla, Sukumar Nandi","doi":"10.1109/ICCS.2002.1183243","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183243","url":null,"abstract":"Reliable transport protocols such as TCP are tuned to perform well in traditional wired networks, where packet losses occur mostly because of congestion. However, networks with wireless and other lossy links also suffer from significant losses due to bit errors and handoffs. TCP interprets these delays and losses as signs of network congestion and responds to all these losses by invoking congestion control and avoidance algorithms, resulting in degraded end-to-end performance in wireless and lossy systems. Most of the existing results of TCP for wireless networks are either take care of high bit error rate (BER) at the wireless links or the frequent handoffs and disconnections. This paper presents an integrated TCP mechanism to be used in mobile environments. It takes care of random bit errors on the wireless link, the congestion in the network and typical handoffs; in a cellular network scenario without violating end-to-end semantics.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115458698","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
Admission control mechanism using measurement based dynamic provisioning in differentiated service networks 基于度量的差异化业务网络动态供应的准入控制机制
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182451
W. Rhee, Jun-Hwa Lee, Mijung Yang, Jea-Hoon Yu, Sang-Ha Kim
{"title":"Admission control mechanism using measurement based dynamic provisioning in differentiated service networks","authors":"W. Rhee, Jun-Hwa Lee, Mijung Yang, Jea-Hoon Yu, Sang-Ha Kim","doi":"10.1109/ICCS.2002.1182451","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182451","url":null,"abstract":"The differentiated service architecture is based on a simple model by applying a per-class service in the core node of the network. However, due to the simplified network behaviour, the network structure and provisioning were more complicated. If a service provider wants the dynamic provisioning or better bandwidth guarantee, signaling protocol with QoS parameters or admission control method should be deployed in DiffServ network. However, these methods increase the complexity. Therefore, we propose new dynamic provisioning mechanism for admission control in the DiffServ network based on the centralized bandwidth broker and distributed measurement based admission control and movable boundary bandwidth management.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"260 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115817095","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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