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A resource efficient RT-QoS routing protocol for mobile ad hoc networks 面向移动自组织网络的资源高效RT-QoS路由协议
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088172
S. De, S.K. Das, Hongyi Wu, C. Qiao
{"title":"A resource efficient RT-QoS routing protocol for mobile ad hoc networks","authors":"S. De, S.K. Das, Hongyi Wu, C. Qiao","doi":"10.1109/WPMC.2002.1088172","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088172","url":null,"abstract":"We investigate a predictive trigger-based, distributed routing protocol, called TDR, for supporting real-time applications in mobile ad hoc networks. The nodal database size is reduced by maintaining only the local neighborhood information. Only one route per session is maintained and the reroute routine is invoked before any active link fails. In addition, by making efficient use of the location information, the control overhead for rerouting is further reduced Our evaluation shows that the TDR protocol provides better QoS and requires lower control overhead compared to the other existing real-time QoS aware ad hoc routing protocols.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123865831","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: 21
A study of inter-vehicle communication protocol based on frequency hopping technique 基于跳频技术的车际通信协议研究
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088185
T. Ikegami, E. Yamashita
{"title":"A study of inter-vehicle communication protocol based on frequency hopping technique","authors":"T. Ikegami, E. Yamashita","doi":"10.1109/WPMC.2002.1088185","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088185","url":null,"abstract":"This paper describes protocols for inter-vehicle communication (IVC) to support safe driving with wireless technology. Many IVC systems using DS/SS are proposed, but proposals that use FH/SS are less than those. This paper suggests IVC based on the FH/SS technique, assuming real road conditions, and evaluation via computer simulation. As a consequence, this simulation shows that the time to establish the communication link in an AWGN propagation path is stable and saves time when using 8 hopping frequency.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127977581","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
Convergence properties of iterative turbo decoding based on the number of searched states 基于搜索状态数的迭代turbo译码收敛特性
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088319
A. Assalini, M. Borgo, S. Pupolin
{"title":"Convergence properties of iterative turbo decoding based on the number of searched states","authors":"A. Assalini, M. Borgo, S. Pupolin","doi":"10.1109/WPMC.2002.1088319","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088319","url":null,"abstract":"We investigate the evolution of the trellis path through the state diagram of a turbo code versus the number of iterations n/sub i/. Simulations show that the BER and the number of states with probability above a given threshold have the same convergence behavior versus n/sub i/. As a consequence we propose a new criterion to stop the iterative decoding process. A new algorithm to avoid the channel parameters estimation is proposed too. The joint combination of the proposed algorithms perform the same as the optimum solution with reduced computational complexity.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121429608","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
High-throughput, high-performance OFDM via pseudo-orthogonal carrier interferometry type 2 高吞吐量，高性能OFDM通过伪正交载波干涉型2
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088271
D. Wiegandt, C. Nassar
{"title":"High-throughput, high-performance OFDM via pseudo-orthogonal carrier interferometry type 2","authors":"D. Wiegandt, C. Nassar","doi":"10.1109/WPMC.2002.1088271","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088271","url":null,"abstract":"OFDM (orthogonal frequency division multiplexing) demonstrates poor probability of error performance in fading channels, and hence many OFDM systems utilize channel coding. The addition of this coding, adding both redundancy and frequency diversity, comes at a cost of reduced overall throughput (typically by a factor of 2). PO-CI/OFDM is as a new methodology to enhance performance in OFDM systems, via channel coding, without bandwidth expansion or decreased throughput. Specifically, by placing 2N symbols pseudo-orthogonally on the N OFDM carriers (via the use of spreading codes) and by introducing rate 1/2 convolutional coding, PO-CI/OFDM achieves the benefit of channel coding in OFDM without the cost of throughput reduction. It is shown that, in BPSK systems, at a bit error rate of 10/sup -3/, this method gains 15 dB over OFDM, equaling the performance of traditional coded OFDM (COFDM) without the throughput reduction.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129360799","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: 12
FCM receiver improved with reference symbols exploitation for OFDM systems 利用参考符号对OFDM系统的FCM接收机进行改进
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088393
L. Favalli
{"title":"FCM receiver improved with reference symbols exploitation for OFDM systems","authors":"L. Favalli","doi":"10.1109/WPMC.2002.1088393","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088393","url":null,"abstract":"In this work, the capabilities of clustering-based receivers for potential application in a multicarrier environment are explored. In particular, we have examined the possibility to use the pilot symbol inserted in an OFDM frame to help the receiver in case of phase rotations introduced by the transmission system. The algorithm has also been successfully tested with a channel introducing severe intersymbol interference. In all cases there is a strong gain that allows usage of modulations at least one order of magnitude greater at a very limited additional computational cost.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128735548","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
Design issues of Mobile IP handoffs between General Packet Radio Service (GPRS) networks and wireless LAN (WLAN) systems 通用分组无线业务(GPRS)网络和无线局域网(WLAN)系统之间移动IP切换的设计问题
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088301
S. Aust, D. Proetel, A. Konsgen, C. Pampu, C. Gorg
{"title":"Design issues of Mobile IP handoffs between General Packet Radio Service (GPRS) networks and wireless LAN (WLAN) systems","authors":"S. Aust, D. Proetel, A. Konsgen, C. Pampu, C. Gorg","doi":"10.1109/WPMC.2002.1088301","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088301","url":null,"abstract":"This paper describes the system design and implementation of a demonstrator prototype, running at University of Bremen, which implements Mobile IP handoffs between GPRS and WLAN systems. Mobile IP requires public IP addresses but there is no support of such IP addresses by most mobile operators. To solve the problem of NAT (network address translation) and firewalls resulting from this, several concepts are available. This paper presents a practical implementation of one such concept where Mobile IP handoffs are realised using tunneling functions and an additional Mobile IP foreign agent to provide GPRS network access. Furthermore, this paper presents measurement results of the test bed and shows the quality of the Mobile IP handoffs.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128750598","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
Proposal of a time-hopping pulse spacing modulation system with restricted amplitude levels 一种限幅级跳时脉冲间隔调制系统的提出
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088383
F. Ono, H. Habuchi
{"title":"Proposal of a time-hopping pulse spacing modulation system with restricted amplitude levels","authors":"F. Ono, H. Habuchi","doi":"10.1109/WPMC.2002.1088383","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088383","url":null,"abstract":"In this paper, a time-hopping pulse spacing modulation system with restricted amplitude levels is proposed. The proposed system uses several PN codes, and it transmits the information by the interval between the successive PN codes. The bit error rate performance and the synchronization performance of the proposed system on the additive white Gaussian noise (AWGN) channel are evaluated by theoretical analysis. As a result, there is the optimum preamble pattern for bringing the probability of block error that takes into account the synchronization performance close to the lower bound.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115811878","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
A power control scheme for MANETs with improved throughput and energy consumption 一种具有提高吞吐量和能耗的manet功率控制方案
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088280
M. Krunz, A. Muqattash
{"title":"A power control scheme for MANETs with improved throughput and energy consumption","authors":"M. Krunz, A. Muqattash","doi":"10.1109/WPMC.2002.1088280","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088280","url":null,"abstract":"We propose a new power-control protocol for medium access control (MAC) in mobile ad hoc networks. Compared with the EEEE 802.11 approach, the proposed protocol achieves significant improvement in both throughput and energy consumption. The protocol relies on dynamic adjustment of the data-packet transmission power, while maintaining a fixed (maximum) transmission power for control (RTS/CTS) packets. Furthermore, it allows nodes to control the transmission power of the route request (RREQ) packets, which indirectly influences the next-hop selection at the upper routing layer. This is done by dynamically computing a node-dependent connectivity set. RREQ packets are broadcasted only to nodes within the connectivity set. The connectivity set guarantees the node's connectivity to the rest of the network, while at the same time enabling a simple (min-hop) routing algorithm to provide power-efficient routes. Channel gain and directional information obtain from overheard RTS/CTS exchanges are used to compute the connectivity set. Our protocol allows for concurrent yet interference-limited transmissions to take place in the vicinity of a receiver. A modified RTS/CTS exchange allows nodes to broadcast their interference margins and requested transmission powers.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116385038","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: 19
End-to-end in-band protocol based service quality and transport QoS control framework for wireless 3/4G services 基于端到端带内协议的无线3/4G业务质量和传输QoS控制框架
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088230
E. Wallenius
{"title":"End-to-end in-band protocol based service quality and transport QoS control framework for wireless 3/4G services","authors":"E. Wallenius","doi":"10.1109/WPMC.2002.1088230","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088230","url":null,"abstract":"Service quality and overall quality of service management will be an important issue in future 3/4G networks. To ensure service quality and QoS to the subscribers, whole new means have to be developed due the fact that there is no management system especially designed for the new types of wireless services and wireless environment. The goal, to have an end-to-end management functionality in 3/4G service networks, is very challenging and, therefore, also very rewarding. For this purpose, we have developed an in-band service control protocol and framework concept for 3/4G services. This concept can be used on any network-based services and in any network environment but the paper concentrates only on the wireless service environment and its management.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"129 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116901500","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
W-CDMA random access channel transmission over satellite-UMTS 基于卫星- umts的W-CDMA随机接入信道传输
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088216
V. Kueh, A. Capellacci, R. Tafazolli, B. Evans
{"title":"W-CDMA random access channel transmission over satellite-UMTS","authors":"V. Kueh, A. Capellacci, R. Tafazolli, B. Evans","doi":"10.1109/WPMC.2002.1088216","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088216","url":null,"abstract":"The random access channel (RACH) is an uplink transport channel defined in UMTS for initial channel access to the network as well as for sending short data bursts. The RACH structure and procedure as defined by 3GPP are not directly applicable for satellite-UMTS (S-UMTS) due to the different characteristics of the satellite channel. Based on the optimized schemes proposed for S-UMTS RACH, this paper investigates the issue of assigning services with different quality of service (QoS) requirements to different access service classes (ASCs). Such service differentiation is required in third generation wireless systems where multiple service classes with different QoS parameters are to be supported. Via simulations, it is shown that service differentiation is possible through appropriate RACH resource allocation among these different ASCs.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115519592","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
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