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

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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
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
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
Multi-user detection via iterative processing 通过迭代处理进行多用户检测
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.904769
C. Schlegel
{"title":"Multi-user detection via iterative processing","authors":"C. Schlegel","doi":"10.1109/WCNC.2000.904769","DOIUrl":"https://doi.org/10.1109/WCNC.2000.904769","url":null,"abstract":"Multi-user detection of CDMA signals is studied in the light of iterative processing. The factor graph representation of a CDMA system is used to develop a low-complexity joint detection algorithm. This algorithm replaces the large sums that appear at the multiple access nodes by simple averages and ignores the error control code network of the interfering users, assuming a fixed probability distribution on the output symbols of the interfering users. This is optimal in the case where the code network for the interfering users is unknown, and amounts to an error control decoder using a multi-user metric generator. Simplifications of the multi-user metric generation lead to linear iterative metric generators. Simulation and analytical results on the performance of these detectors are shown and illustrate complexity/performance trade-offs.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"16 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":"116171817","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
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
Wireless technologies convergence: results and experience 无线技术融合:结果与经验
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.903915
N. Nikolaou, K. Vaxevanakis, S. Maniatis, I. Venieris, N. Zervos
{"title":"Wireless technologies convergence: results and experience","authors":"N. Nikolaou, K. Vaxevanakis, S. Maniatis, I. Venieris, N. Zervos","doi":"10.1109/WCNC.2000.903915","DOIUrl":"https://doi.org/10.1109/WCNC.2000.903915","url":null,"abstract":"The wireless network evolution, delineated during the last years, has urged the necessity to extend the up-to-now static business environment to a mobile and wireless one. However, the current and forthcoming wireless technologies are characterized by different attributes regarding the coverage area, offered bandwidth and delay. The transparent conjunction of various wireless technologies into a single mobile terminal can further boost the wireless explosion. This paper presents the architectural approach and the results concerning the continuous connectivity and seamless switching between two complementary wireless networks, one 802.11-compliant in the short area and a CSM in the wide area. The described experiments were performed on an open, IP-based wireless architecture that can be easily extended to accommodate future wireless networks.","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":"121219980","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
Energy-efficient antenna sharing and relaying for wireless networks 无线网络的高能效天线共享和中继
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.904590
J. N. Laneman, G. Wornell
{"title":"Energy-efficient antenna sharing and relaying for wireless networks","authors":"J. N. Laneman, G. Wornell","doi":"10.1109/WCNC.2000.904590","DOIUrl":"https://doi.org/10.1109/WCNC.2000.904590","url":null,"abstract":"We develop energy-efficient transmission protocols for wireless networks that exploit spatial diversity created by antenna sharing: coordinated transmission and/or processing by several distributed radios. We focus on single-user transmission and examine several possibilities for the strategy employed by the assisting radio, or relay, including decoding and forwarding as well as amplifying and forwarding. In each case, we develop receivers based upon maximum-likelihood and/or maximum signal-to-noise ratio criteria, relate their structures, and compare their bit-error probability performance by means of analysis and simulations. We cast single-hop and multihop routing into our framework for comparison purposes. All of our antenna sharing protocols offer diversity gains over single-hop and multihop transmission, and our results suggest that low-complexity amplifying and forwarding is energy-efficient in spite of noise amplification at the relay.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"111 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":"122330967","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: 934
A novel QoS scheme for handoffs in wireless IP networks 一种新的无线IP网络切换QoS方案
2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI: 10.1109/WCNC.2000.903902
T. Janevski, B. Spasenovski
{"title":"A novel QoS scheme for handoffs in wireless IP networks","authors":"T. Janevski, B. Spasenovski","doi":"10.1109/WCNC.2000.903902","DOIUrl":"https://doi.org/10.1109/WCNC.2000.903902","url":null,"abstract":"Next generation Internet will have wireless access to the network. Fast technology development assures that Internet in the future will include many mobile portable devices moving in a micro-cellular network. We are defining a novel scheme for improving handoff performances in wireless IP networks by using handoff agents (HAg) established at base stations and cross-over nodes of the network. Handoff agents are rerouting the packets during the handoff from the old towards the new base station via core links. This algorithm gives better performances on different traffic flows compared to other handoff schemes. It performs smooth handoff without duplicate packets and gives zero handoff packet losses, adding negligible packet delay during the handoff. Also, the algorithm does not load the Internet with the control traffic by performing handoffs within the current user domain.","PeriodicalId":404304,"journal":{"name":"2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)","volume":"60 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":"127142437","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
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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