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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
Performance evaluation of GSM and GPRS systems based on measurement campaigns 基于测量活动的GSM和GPRS系统性能评估
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088362
S. Kyriazakos, V. Gkroustiotis, C. Karambalis, C. Kechagias, N. Papaoulakis, D. Nikitopoulos, G. Karetsos
{"title":"Performance evaluation of GSM and GPRS systems based on measurement campaigns","authors":"S. Kyriazakos, V. Gkroustiotis, C. Karambalis, C. Kechagias, N. Papaoulakis, D. Nikitopoulos, G. Karetsos","doi":"10.1109/WPMC.2002.1088362","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088362","url":null,"abstract":"A comprehensive study of the performance of GSM and GPRS is presented. The behavior of the network is classified into traffic load scenarios and key indicators are presented. Network response and logical channel occupation are discussed and the GPRS segment is evaluated according to a measurement campaign. Focus is given. on traffic overload and network congestion. This in-depth study can be used as a basis to evaluate the efficiency of resource management techniques in cellular systems.","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":"125431049","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
Performance of site selection diversity transmission in WCDMA WCDMA中站点选择分集传输的性能
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088134
P. Coulon, S. Vadgama
{"title":"Performance of site selection diversity transmission in WCDMA","authors":"P. Coulon, S. Vadgama","doi":"10.1109/WPMC.2002.1088134","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088134","url":null,"abstract":"Soft handoff is considered to be essential in direct sequence-code division multiple access (DS-CDMA) based mobile communication systems. However the interference resulting from the transmissions from multiple base sites in the forward link during the soft handoff constrains the multiple access capacity. Site selection diversity transmission (SSDT) technique is able to mitigate the interference caused by transmissions from the multiple base sites. The 3/sup rd/ Generation Partnership Project (3GPP) has specified this technique for the W-CDMA FDD component of UMTS. This paper describes the SSDT technique and presents capacity simulation results. It is shown that the capacity gain is dependent on the Doppler speed of mobile terminals and correlation of shadow fading between adjacent cells.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"235 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":"127045992","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
A novel mobility management framework for future generation integrated wireless networks 面向未来一代集成无线网络的新型移动性管理框架
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088193
K. Mahmud, M. Inoue, H. Murakami, M. Hasegawa, Gang Wu, M. Mizuno
{"title":"A novel mobility management framework for future generation integrated wireless networks","authors":"K. Mahmud, M. Inoue, H. Murakami, M. Hasegawa, Gang Wu, M. Mizuno","doi":"10.1109/WPMC.2002.1088193","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088193","url":null,"abstract":"The concept of using a separate network to carry signaling packets related to some basic mobility management functions in a heterogeneous wireless network environment has been proposed in MIRAI (multimedia integrated network by radio access innovation) architecture (see Wu, G. et al., IEEE Commun. Mag., p.126-34, 2002). In MIRAI architecture, a dedicated network takes care of the mobility functionalities of the participant wireless access networks. The dedicated network, called basic access network (BAN), is primarily used for paging whenever a call arrives for the mobile user for any of the wireless interfaces of the user's multi-service terminal, and for wireless system discovery when the user wants to initiate a call/session. We present the operation of the BAN in concert with the rest of the IP-based network, to realize a common signaling framework for heterogeneous mobility.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"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":"125994008","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
Resource reservation schemes for handover issue in LEO satellite systems 低轨道卫星系统切换问题的资源预留方案
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088372
L. Boukhatem, D. Gaiti, G. Pujolle
{"title":"Resource reservation schemes for handover issue in LEO satellite systems","authors":"L. Boukhatem, D. Gaiti, G. Pujolle","doi":"10.1109/WPMC.2002.1088372","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088372","url":null,"abstract":"In this paper, we propose two channel reservation mechanisms called time-based channel reservation algorithm (TCRA) and TCRA with overbooking (TCRA-O). The aim of both algorithms is to handle the handover issue in low Earth orbit satellite networks. These systems are characterized by a high rate of handover attempts which can degrade significantly their performance. Therefore, we first propose TCRA, a scheme which guarantees a null handover failure probability by using a channel reservation strategy in the cells to be crossed by the user. Secondly, we extend the mechanism into TCRA-O to take into account the call termination probability. Both mechanisms are compared to the GH (guaranteed handover) scheme previously proposed in the literature.","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":"126832018","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
Automated and remotely optimization of antenna subsystem based on radio network performance 基于无线网络性能的天线子系统自动化远程优化
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088276
A. Wacker, K. Sipila, A. Kuurne
{"title":"Automated and remotely optimization of antenna subsystem based on radio network performance","authors":"A. Wacker, K. Sipila, A. Kuurne","doi":"10.1109/WPMC.2002.1088276","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088276","url":null,"abstract":"3rd generation (3G) radio networks using WCDMA radio access technology will offer the customers services with higher bit rates than in nowadays 2nd generation networks. All users share the same frequency resource, therefore 3G networks are commonly believed to be interference limited. For this reason it is of utmost importance to exploit all possibilities in keeping the interference level as low as possible. One means for this, already used in 2G systems, is adjusting the downtilt of the antennas in a way, reducing the interference transmitted and received as much as possible, still ensuring the required coverage. In earlier studies it has been shown how careful radio network planning already in the preoperational phase can drastically increase 3G network performance. Optimal downtilt was found by applying a constant tilt to all cells in the network. The network consisted only of very high sites and therefore the gains of e.g. 40-50% in capacity were considered to be optimistic. The scope of the simulations for this paper therefore was to evaluate the gains in terms of capacity by optimizing the antenna tilt of WCDMA networks cell by cell in a more realistic environment, showing still gains of up to 20%.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"39 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":"127277415","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
The advantages of a known sequence versus cyclic prefix in a SC/FDE system 已知序列与循环前缀在SC/FDE系统中的优势
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088395
H. Witschnig, T. Mayer, A. Springer, L. Maurer, M. Huemer, R. Weigel
{"title":"The advantages of a known sequence versus cyclic prefix in a SC/FDE system","authors":"H. Witschnig, T. Mayer, A. Springer, L. Maurer, M. Huemer, R. Weigel","doi":"10.1109/WPMC.2002.1088395","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088395","url":null,"abstract":"In this work we investigate the advantages of a known symbol sequence - a so-called unique word (UW) - instead of the well-known cyclic prefix (as is used in OFDM systems) for a single carrier system with frequency domain equalization (SC/FDE). The concept of UW fulfills the theorem of cyclic convolution - required to implement an efficient equalization for the SC/FDE structure. We elaborate on the advantages that result for decision feedback equalization (DFE) in detail. It is shown that a DFE based on the concept of UW shows significant advantages in comparison to a traditional time domain DFE or a DFE based on cyclic prefix. Simulation results confirm the theoretical advantages.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"11 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":"126500417","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: 28
Space-time coded transmit diversity in multi-satellite UMTS 多卫星UMTS的空时编码发射分集
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088264
L. Mucchi, R. Tesi, D. Tujkovic, E. Kunnari
{"title":"Space-time coded transmit diversity in multi-satellite UMTS","authors":"L. Mucchi, R. Tesi, D. Tujkovic, E. Kunnari","doi":"10.1109/WPMC.2002.1088264","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088264","url":null,"abstract":"The paper analyzes and compares the performance of some space-time codes applied to the forward link of a WCDMA multi-satellite UMTS environment. Space-time trellis codes (STTrC) have been considered as a first comparison with already implemented transmit diversity schemes, such as maximal ratio combining (MRC), space-time block codes (STBC) and selection transmit diversity (STD). Furthermore, in order to improve their performance, convolutional codes (CC) have been added as outer encoders to MRC, STBC and STD, while for STTrC, a CC plus iterative decoding has been considered in order to perform space-time turbo coded modulation (STTuCM). All these schemes have been implemented in a multi-satellite environment. An intra- and inter-cell interference model is presented in order to evaluate the performance of these schemes for a loaded system. The effect of a feedback delay and errors in channel state identification have been introduced in order to have a real behavior of closed-loop schemes.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"23 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":"121977730","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
Performance evaluation of a new scatternet formation protocol for multi-hop Bluetooth networks 一种新的多跳蓝牙散射网形成协议的性能评估
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088162
S. Basagni, Raffaele Bruno, C. Petrioli
{"title":"Performance evaluation of a new scatternet formation protocol for multi-hop Bluetooth networks","authors":"S. Basagni, Raffaele Bruno, C. Petrioli","doi":"10.1109/WPMC.2002.1088162","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088162","url":null,"abstract":"We evaluate the performance of a new protocol for scatternet formation in Bluetooth multihop networks. The protocol implements the three fundamental steps to scatternet. formation, namely, device discovery, piconet formation and piconet interconnection. A Bluetooth extension to ns2, the VINT project simulator, has been developed to address all the details pertinent to scatternet formation.. The performance evaluation allows us to assess the impact of the device discovery duration over the scatternet formation process, to evaluate the time for the protocol to generate a connected scatternet, and to investigate metrics that pertain to the \"quality\" of the scatternet, such as the average number of piconets, the average number of slaves per piconets, the average number of roles assumed by each node and the average length of the routes between any two Bluetooth devices.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"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":"122629909","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: 22
Radio resource management and evolutionary computation in CDMA cellular radio networks CDMA蜂窝无线网络中的无线资源管理和进化计算
The 5th International Symposium on Wireless Personal Multimedia Communications Pub Date : 2002-12-16 DOI: 10.1109/WPMC.2002.1088371
Won Jay Song, B. Ahn, S. J. Kim, Mun-kee Choi, Won Hee Kim, B. Kim
{"title":"Radio resource management and evolutionary computation in CDMA cellular radio networks","authors":"Won Jay Song, B. Ahn, S. J. Kim, Mun-kee Choi, Won Hee Kim, B. Kim","doi":"10.1109/WPMC.2002.1088371","DOIUrl":"https://doi.org/10.1109/WPMC.2002.1088371","url":null,"abstract":"The paper proposes distributed power control (PC) algorithms that employ two evolutionary computation (EC) or genetic algorithm (GA) techniques to solve systems of linear equations for power update in CDMA cellular radio systems. The proposed algorithms apply evolutionary computation algorithms from a phenotypic and a genotypic view to the CDMA power control problem. The major gain from the evolutionary computation algorithms is more rapid optimization on systems of linear equations compared with the simple genetic algorithm (SGA). Employing distributed constrained power control (DCPC) and bang-bang (BB) algorithms as the basic reference, we have designed and implemented computational experiments on the DS-CDMA system. The proposed EC-DCPC phenotypic algorithm is compared with the DCPC algorithm. The GA-DCPC genotypic algorithm is also compared with the BB algorithm used in IS-95 and W-CDMA systems. The simulation results indicate that the proposed EC-DCPC phenotypic and GA-DCPC genotypic algorithms significantly decrease mobile terminal power consumption compared with the DCPC and BB algorithms, respectively. The calculation results show that our proposed EC-DCPC phenotypic and GA-DCPC genotypic algorithms also have a high potential advantage for increasing CDMA cellular radio network capacity.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"133 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":"122904941","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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