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Intelligent network access and inter-system handover control in heterogeneous wireless networks for smart space environments 智能空间环境下异构无线网络的智能网络接入与系统间切换控制
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407210
K. Murray, D. Pesch
{"title":"Intelligent network access and inter-system handover control in heterogeneous wireless networks for smart space environments","authors":"K. Murray, D. Pesch","doi":"10.1109/ISWCS.2004.1407210","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407210","url":null,"abstract":"The next generation of mobile networks supports not just the simple mobile connectivity but also the access in the evolving smart space environments. It is expected that these systems utilise multiple radio access technologies, seamlessly integrated to form a heterogeneous wireless access network, thus enabling total ubiquitous computing. On the arrival of a service request from a smart space user or device, the network operator must assign one of the available access networks. Selecting the network that has the highest probability of providing the best quality of service (QoS) for a particular service type is an important consideration for overall network stability and QoS provisioning. In this paper, we present the aspects of intelligent radio resource management based on policy based call admission control to select the best available network and fuzzy logic based inter-system handover control. The admission controller admits a new user based on the current load and service mix in each available network. The fuzzy logic controller focuses on inter-system handover initiation so as to maintain satisfactory QoS to the end user, while limiting excessive inter-system handover attempts.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132924947","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: 15
Prototype modem with unequal equal error protection capability for satellite communication experiments 卫星通信实验中具有不等等误差保护能力的原型调制解调器
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407250
Huan-Bang Li, S. Taira
{"title":"Prototype modem with unequal equal error protection capability for satellite communication experiments","authors":"Huan-Bang Li, S. Taira","doi":"10.1109/ISWCS.2004.1407250","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407250","url":null,"abstract":"We developed a prototype modem for mobile satellite communication experiments. This modem has the capability of unequal error protection (UEP) based on multiple block coded modulation (MBCM). A new carrier recovery technique and a frame format were proposed and implemented within the modem.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"359 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134502415","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
UDP-Liter: an improved UDP protocol for real-time multimedia applications over wireless links UDP- l:一种改进的UDP协议，用于无线链路上的实时多媒体应用
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407260
P. P. Lam, S. Liew
{"title":"UDP-Liter: an improved UDP protocol for real-time multimedia applications over wireless links","authors":"P. P. Lam, S. Liew","doi":"10.1109/ISWCS.2004.1407260","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407260","url":null,"abstract":"For wireless real-time multimedia applications, the excessive packet loss rate suffered at the receiver, especially when the packets are transported on UDP, is a major issue to resolve. The previously proposed UDP-Lite project was designed to replace traditional UDP, so that erroneous UDP payloads could be passed up to the application layer instead of being discarded. The main argument of UDP-Lite is that many real-time multimedia applications actually prefer damaged packets over lost ones because of their error resilience capabilities. The major drawback of UDP-Lite is the backward incompatibility against traditional UDP stacks in numerous UDP devices. In addition, applications have no choice but to accept UDP-Lite packets as normal ones. This paper introduces another approach, UDP-Liter, which makes use of the concept of UDP-Lite, and yet maintains 100% backward compatibility. Better yet, UDP-Liter will give applications the flexibility to handle normal packets and corrupted packets differently.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115621694","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
A study on error correcting and diversity combiner scheme on multiple routes in wireless multi-hop networks 无线多跳网络中多路由纠错和分集组合方案的研究
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407234
Hiraku Okada, N. Koie, Nobuyuki Nakagawa, T. Yamazato, M. Katayama
{"title":"A study on error correcting and diversity combiner scheme on multiple routes in wireless multi-hop networks","authors":"Hiraku Okada, N. Koie, Nobuyuki Nakagawa, T. Yamazato, M. Katayama","doi":"10.1109/ISWCS.2004.1407234","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407234","url":null,"abstract":"Wireless multi-hop networks have been much attention for the possibility of flexible construction of the network topology. One of the important and interesting techniques for multi-hop networks is a multi-path routing. By using the multipath routing, multiple routes from a source node to a destination node can be established. In this paper, we propose the error correcting and diversity combiner scheme on multiple routes in wireless multi-hop networks to reduce bit errors. The diversity combiner outputs the likelihood information from the packets transmitted via multiple routes. By feeding the likelihood information into the Viterbi decoder, the diversity gain can be obtained. We evaluate the packet error rate and the total traffic. As a result, the packet error rate can be improved. Furthermore, the total traffic can be reduced in the low E/sub b//N/sub o/ in spite of the traffic increase due to transmission via redundant routes.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"10 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121004917","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
Performance comparison of channel allocation techniques in packet-switched mobile communication networks 分组交换移动通信网络中信道分配技术的性能比较
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407231
J. Gozálvez, Juan Jesús González Delicado
{"title":"Performance comparison of channel allocation techniques in packet-switched mobile communication networks","authors":"J. Gozálvez, Juan Jesús González Delicado","doi":"10.1109/ISWCS.2004.1407231","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407231","url":null,"abstract":"Channel allocation techniques are responsible for deciding which available channel is assigned to new transmissions. Since channel quality conditions and dynamics experienced during data transmissions can be affected by the mechanism used to assign free channels, this paper proposes and evaluates different channel allocation techniques in an adaptive packet-switched mobile radio network. The common criteria used for all the techniques under consideration is to assign incoming calls the available channel that experienced the best channel quality in previous transmissions. The difference between the proposed algorithms is the metric used to evaluate the channel quality. In particular three metrics are considered: BER, BLER and mean CIR. The results obtained highlight considerable performance improvements compared to other traditional techniques, such as random channel allocation.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122373110","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
The effect of single-antenna interference cancellation on GPRS performance 单天线干扰消除对GPRS性能的影响
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407197
M. Moisio, Kennett Aschan
{"title":"The effect of single-antenna interference cancellation on GPRS performance","authors":"M. Moisio, Kennett Aschan","doi":"10.1109/ISWCS.2004.1407197","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407197","url":null,"abstract":"Single antenna interference cancellation (SAIC) is a very interesting and promising technology currently being standardized in 3GPP as part of GERAN Release 6. It is based on the latest developments in advanced receiver design. In the most advantageous interference conditions, SAIC can improve the signal-to-noise ratio over 10 dB. In this paper, we report on a study of the effect of SAIC on the capacity of a typical GSM network in terms of GPRS data throughput. Our results verify that SAIC provides a significant increase in network capacity not only for speech traffic but also for GPRS data traffic. Since current SAIC receiver algorithms are generally optimized for GMSK modulated signals, we were also interested in the proportion of GMSK and 8-PSK signals in a typical GSM network with EDGE data traffic. We found that in the case of a typical distribution of speech, GPRS and EGPRS traffic, the proportion of 8-PSK signals is relatively small. We can therefore expect that EDGE will not significantly diminish the effectiveness of SAIC in GSM networks.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122713758","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
A non-linear binary integer programming model for location area partitioning in cellular radio networks 蜂窝无线网络中位置区域划分的非线性二进制整数规划模型
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407214
Daniel Chien Ming Kuan, B. Yeo
{"title":"A non-linear binary integer programming model for location area partitioning in cellular radio networks","authors":"Daniel Chien Ming Kuan, B. Yeo","doi":"10.1109/ISWCS.2004.1407214","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407214","url":null,"abstract":"The scarce radio resources available to any cellular radio network have to be shared between its revenue-generating voice- and data-carrying services, and non-revenue-generating management services. One of these management services is location management, crucial for the network to keep track of the location of its subscribers and to connect their incoming calls. Location management consists of the two activities, paging and location updating, both of which are structured around a subdivision of the network service area called the location area (LA). The ways in which the service area is partitioned therefore has a direct impact on the amount of radio bandwidth that has to be spent on location management. However, paging and location updating share an antagonistic relationship, and finding the optimal LA partitioning that strikes a balance between the two is a challenging design problem. In this paper, the problem of finding the optimal LA partitioning of a cellular radio network service area in order to minimise the total location management signalling cost is addressed. The choice of the decision variables used in the mathematical programming model results in an objective function that is conceptually easy to understand and a solution method that is simple and straightforward.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122049002","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
Analysis of iterative receivers for clipped COFDM signaling based on soft turbo-DAR 基于软涡轮雷达的COFDM信号裁剪迭代接收机分析
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407219
M. Colas, G. Gelle, D. Declerq
{"title":"Analysis of iterative receivers for clipped COFDM signaling based on soft turbo-DAR","authors":"M. Colas, G. Gelle, D. Declerq","doi":"10.1109/ISWCS.2004.1407219","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407219","url":null,"abstract":"High peak average to power ratio (PAPR) is one of the main drawback of the OFDM systems currently used in high rate communication standards. One way to reduce PAPR consists in clipping the amplitude of the OFDM signals introducing an additional noise that degrades the system performances. This paper presents in a first part, the EXIT charts analysis of an iterative reconstruction algorithm of the clipped samples in coded OFDM systems called soft turbo-DAR. This algorithm was recently presented in G Gelle et al., (2004). Moreover, after noticing that the structure of the turbo-DAR algorithm is very close to the BICM-ID receiver, we propose a new algorithm called TD-BICM which outperforms the soft turbo-DAR for E/sub b//N/sub 0/ > 5 dB.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131585575","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
Iterative symbol synchronization using variable IIR and FIR fractional-delay filters with arbitrary oversampling ratios 使用任意过采样比的可变IIR和FIR分数延迟滤波器的迭代符号同步
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-05-17 DOI: 10.1109/ICASSP.2004.1326280
M. Makundi, T. Laakso, A. Hjørungnes
{"title":"Iterative symbol synchronization using variable IIR and FIR fractional-delay filters with arbitrary oversampling ratios","authors":"M. Makundi, T. Laakso, A. Hjørungnes","doi":"10.1109/ICASSP.2004.1326280","DOIUrl":"https://doi.org/10.1109/ICASSP.2004.1326280","url":null,"abstract":"Software radio systems employ direct conversion receivers with asynchronous sampling such that the actual sampling instants are not synchronized with the incoming symbols. In this paper, an iterative low-complexity symbol synchronization algorithm is proposed. In our proposal, the timing estimate is obtained using two iteration rounds. Qn the first iteration round, we find a rough estimate of the timing error and on the second iteration round, we obtain our final improved timing error estimate. The technique is illustrated with example implementations using both FIR and IIR FD filters showing improved estimation accuracy with comparisons to previously published results. Furthermore, the proposed iterative symbol synchronization algorithm is also shown to reduce the overall implementation complexity.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130500940","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: 8
Analysis of correlation between Ricean K-factor and vegetation density surrounding a CDMA mobile terminal CDMA移动终端周边植被密度与Ricean k因子的相关性分析
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 1900-01-01 DOI: 10.1109/iswcs.2004.1407203
Erik Östlin, Hans-Jürgen Zepernick, Hajime Suzuki, A. Pollok
{"title":"Analysis of correlation between Ricean K-factor and vegetation density surrounding a CDMA mobile terminal","authors":"Erik Östlin, Hans-Jürgen Zepernick, Hajime Suzuki, A. Pollok","doi":"10.1109/iswcs.2004.1407203","DOIUrl":"https://doi.org/10.1109/iswcs.2004.1407203","url":null,"abstract":"In this paper, the propagation measurements obtained by utilising the IS-95 pilot signal of a commercial CDMA mobile network in rural Australia are analysed regarding the small-scale fading characteristics. It is shown that for this environment the characteristics can be described by the Ricean distribution, where the K-factor correlates with the clutter density in the vicinity of the mobile receiving antenna. The Ricean K-factor indicates the small-scale fading margin required in a link budget calculation scenario, where pessimistic modelling, assuming Rayleigh fading, would lead to unnecessary high base station transmitter power and possible interference problems. This analysis correlates the vegetation density variations near the mobile receiving antenna to the Ricean K-factor enabling for prediction of the small-scale fading characteristics.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126198327","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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