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2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)最新文献

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Analysis and simulation of a multiaccess scheme over flat slow fading channels 平坦慢衰落信道上多址方案的分析与仿真
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.904673
V. Dua, T. N. Krishnan, U. Mukherji
{"title":"Analysis and simulation of a multiaccess scheme over flat slow fading channels","authors":"V. Dua, T. N. Krishnan, U. Mukherji","doi":"10.1109/WCNC.2000.904673","DOIUrl":"https://doi.org/10.1109/WCNC.2000.904673","url":null,"abstract":"Two factors that need to be considered jointly in multi-access communications are: random arrival of messages for transmission and the noise and interference affecting the communication process. Telatar and Gallager (1995) and Telatar (1992) proposed a multi-access scheme over a no-fading AWGN channel and considered both these factors jointly. By formulating this scheme as a processor sharing queue with a single class of customers, the expected duration of signal (encoded messages) transmission for a given probability of decoding error was determined. Along similar lines, we analyse the multi-access scheme over flat slow fading channels and show that the multi-access scheme formulates as a processor sharing queueing system with multiple classes of customers with each customer belonging to a class determined by the SNR value at which it is received. The performance measures of interest in our study are: (a) the maximum stable throughput, and (b) the signaling duration for a tolerable message. We also conjecture the stability condition of the processor sharing queue. We simulate the scheme to obtain average delays over Rayleigh fading channels, Rician fading channels with Rician factors K=1 and K=1000 and no-fading AWGN channels. The results for the different fading channels are compared for equal values of average received SNR. We find that there is a threshold for the average received SNR, above which the average delay for the fading channel is less than that for the no-fading channel.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124772694","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
Label switched packet transfer for wireless cellular networks 无线蜂窝网络的标签交换分组传输
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.904756
B. Jabbari, R. Papneja, E. Dinan
{"title":"Label switched packet transfer for wireless cellular networks","authors":"B. Jabbari, R. Papneja, E. Dinan","doi":"10.1109/WCNC.2000.904756","DOIUrl":"https://doi.org/10.1109/WCNC.2000.904756","url":null,"abstract":"Packet transfer using a connectionless mode provides considerable simplification in mobility and handoff functionalities in wireless networks. We develop an architecture using label switched packet forwarding to enhance traffic control and accommodate service differentiation in the network. We present the protocol structure, mobility support, and routing, which are essential in this architecture. The use of the label merging technique is discussed to support multiple radio links between a mobile and a multiplicity of base stations. Preliminary performance results are presented for the effect of diversity areas on the admission control policy.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125147806","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: 16
Optimal sequences combined with antenna arrays to suppress the multiuser interference 优化序列与天线阵列相结合抑制多用户干扰
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.903968
Ji-Bing Wang, Ming Zhao, Shidong Zhou, Yan Yao
{"title":"Optimal sequences combined with antenna arrays to suppress the multiuser interference","authors":"Ji-Bing Wang, Ming Zhao, Shidong Zhou, Yan Yao","doi":"10.1109/WCNC.2000.903968","DOIUrl":"https://doi.org/10.1109/WCNC.2000.903968","url":null,"abstract":"Conventional CDMA systems use the PN sequences as the spreading waveforms. In this paper, the spreading and despreading waveforms of different users are optimized by using the instantaneous channel parameters. The maximum receive signal to interference plus noise ratio criterion under the constraint of the fixed transmission power is used to optimize the spreading and despreading waveforms. We find that the proposed scheme can be understood as an adaptive frequency hopping systems. The numerical results indicate that, compared with the conventional spreading waveforms such as Gold sequences, the optimal waveforms can greatly decrease the multiaccess interference. When the optimal waveforms are combined with the antenna arrays, the system performance can be further improved.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123731420","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
RQDMA: a MAC protocol supporting QoS in an IP-based broadband wireless local loop RQDMA:在基于ip的宽带无线本地环路中支持QoS的MAC协议
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.903975
L. Dell'Uomo, F. Fraccalvieri, U. Teloni
{"title":"RQDMA: a MAC protocol supporting QoS in an IP-based broadband wireless local loop","authors":"L. Dell'Uomo, F. Fraccalvieri, U. Teloni","doi":"10.1109/WCNC.2000.903975","DOIUrl":"https://doi.org/10.1109/WCNC.2000.903975","url":null,"abstract":"In the last few years, the wireless local loop (WLL) has been shown to be an attractive alternative to the wired technology for large bandwidth services provisioning. We introduce an IP-based WLL system supporting different services such as fast Internet access, data, voice and videoconference. The proposed system guarantees quality of service (QoS) requirements to different service classes through a MAC protocol named RQDMA (ReQuest based Dynamic Multiple Access) that employs a dynamic bandwidth-sharing algorithm providing high efficiency and fairness among users. The access technique is based on multicarrier CDMA. We also present the inter-working of RQDMA with the IETF Reservation Protocol (RSVP) and an extensive performance evaluation to assess the efficiency, fairness and delay performance of RQDMA with realistic traffic sources.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122395367","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
An ad hoc wireless testbed for scalable, adaptive QoS support 一个用于可扩展、自适应QoS支持的临时无线测试平台
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.904763
R. Ramanathan, R. Hain
{"title":"An ad hoc wireless testbed for scalable, adaptive QoS support","authors":"R. Ramanathan, R. Hain","doi":"10.1109/WCNC.2000.904763","DOIUrl":"https://doi.org/10.1109/WCNC.2000.904763","url":null,"abstract":"We describe the construction of, and our experimental experience with, an ad hoc wireless testbed developed as part of the DARPA Global Mobile Information Systems (GloMo) sponsored MMWN and DAWN projects. The goal of the MMWN/DAWN system is the network-layer support for real-time QoS in large, dense, mobile ad hoc networks. The testbed consists of MMWN/DAWN switches-a single box with an embedded processor, and a commercial radio transceiver, and endpoints-laptops running voice and data applications. We have conducted a number of real-life experiments with this testbed, and report on our experiences and results.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127905001","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: 53
Packet coding schemes for MPEG video over Internet and wireless networks 因特网和无线网络上MPEG视频的分组编码方案
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.904625
Haitao Zheng, J. Boyce
{"title":"Packet coding schemes for MPEG video over Internet and wireless networks","authors":"Haitao Zheng, J. Boyce","doi":"10.1109/WCNC.2000.904625","DOIUrl":"https://doi.org/10.1109/WCNC.2000.904625","url":null,"abstract":"Packet video will become a significant portion in emerging and future wireless/Internet traffic. However, network congestion and wireless channel error yields tremendous packet loss and degraded video quality. We propose a new protocol stack design, which utilizes channel error information obtained from the physical and link layer to assist the packet level error recovery. The proposed scheme is applied to MPEG coded video and tested using various packet loss and wireless channel profiles. The video quality can be substantially improved by using the channel error information at the upper protocol stack such as the UDP and application layer.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"08 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129825604","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: 14
Performance evaluation of flooding-based and associativity-based ad hoc mobile multicast routing protocols 基于泛洪和基于关联的自组织移动组播路由协议的性能评价
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.904815
C. Toh, Santithorn Bunchua
{"title":"Performance evaluation of flooding-based and associativity-based ad hoc mobile multicast routing protocols","authors":"C. Toh, Santithorn Bunchua","doi":"10.1109/WCNC.2000.904815","DOIUrl":"https://doi.org/10.1109/WCNC.2000.904815","url":null,"abstract":"Multicasting exhibits a very attractive characteristic by efficiently distributing a single stream of data to a large number of recipients. Several multicast routing protocols have been proposed for mobile ad hoc networks. Issues associated with such a network include dynamics in network topology, limited link bandwidth and limited power life. We present the performance evaluation of two categories of multicast routing algorithms for mobile ad hoc networks, namely: (a) flooding-based, and (b) associativity-based multicast routing. Two multicast routing protocols based on these two classes are simulated in a common network environment. Simulation results obtained reveal the superior characteristics of our proposed associativity-based multicast routing scheme under the scenario of low to moderate mobility. The flooding-based scheme, however, results in very high communication overhead even though it is able to maintain good throughput in a scenario with very high mobility.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131142114","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
Average error probability of optimum combining with a co-channel interferer in Nakagami fading 中上衰落中与同信道干扰最优组合的平均误差概率
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.904661
V. Aalo, Jingjun Zhang
{"title":"Average error probability of optimum combining with a co-channel interferer in Nakagami fading","authors":"V. Aalo, Jingjun Zhang","doi":"10.1109/WCNC.2000.904661","DOIUrl":"https://doi.org/10.1109/WCNC.2000.904661","url":null,"abstract":"The average bit error rate (BER) performance of an adaptive antenna array system with the optimum combining scheme that maximizes the output signal-to-interference-plus-noise ratio (SINR) is analyzed. BER expressions that are easy to evaluate numerically are derived for a generalized fading environment with a co-channel interference and Gaussian noise. Specifically, we assume that the fading environment is such that the channel may be characterized by a spherically invariant random process (SIRP), with the received signal envelope following the Nakagami-m (1960) distribution. This channel model is sufficiently general to characterize different degrees of fading severity for the desired and interfering signals.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125311078","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
Efficient and robust header compression for real-time services 有效和健壮的报头压缩实时服务
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.903980
K. Le, C. Clanton, Zhigang Liu, Haihong Zheng
{"title":"Efficient and robust header compression for real-time services","authors":"K. Le, C. Clanton, Zhigang Liu, Haihong Zheng","doi":"10.1109/WCNC.2000.903980","DOIUrl":"https://doi.org/10.1109/WCNC.2000.903980","url":null,"abstract":"When real-time multimedia is carried over bandwidth-limited channels using the IP, UDP, and RTP protocols, it is critical to minimize the overhead due to the resulting encapsulating headers. When the payload is small, such as is often the case for voice-over-IP (VoIP) applications, these headers can use a large percentage of the available bandwidth. The overhead can be especially undesirable in wireless environments, where bandwidth is often both scarce and expensive. Error rates in these environments can be very high, dictating the need for robustness as well. This paper describes an IP/UDP/RTP header compression scheme called ACE (adaptive header compression), which utilizes traditional header compression concepts, but adds several new mechanisms to achieve very good bandwidth efficiency. Robustness to errors and error bursts is also achieved.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125655278","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: 13
Power control and rate allocation in multirate wideband CDMA systems 多速率宽带CDMA系统的功率控制与速率分配
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.904621
J. Mark, Shihua Zhu
{"title":"Power control and rate allocation in multirate wideband CDMA systems","authors":"J. Mark, Shihua Zhu","doi":"10.1109/WCNC.2000.904621","DOIUrl":"https://doi.org/10.1109/WCNC.2000.904621","url":null,"abstract":"As a multiple access technology, DS-CDMA operates in an interference limited environment so the system capacity is dominated by multiple access interference (MAI). Since MAI is proportional to the transmit power strengths of other users, the level of transmit power by all participating users requires careful planning and control in order to attain maximum system capacity. The power distribution under a multirate wideband CDMA environment is investigated. It is shown that power control is a function of the spread bandwidth, user data rates, and the user QoS requirements. A power control algorithm, based on a convergence criterion, is proposed. Numerical results which demonstrate the viability of the power control algorithm are presented.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126065441","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: 26
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