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IEEE International Symposium on Personal, Indoor and Mobile Radio Communications最新文献

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Traffic controlled spatial reuse TDMA in multi-hop radio networks 多跳无线网络中业务量控制的空间复用TDMA
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.1998.731370
Jimmi Grönkvist
{"title":"Traffic controlled spatial reuse TDMA in multi-hop radio networks","authors":"Jimmi Grönkvist","doi":"10.1109/PIMRC.1998.731370","DOIUrl":"https://doi.org/10.1109/PIMRC.1998.731370","url":null,"abstract":"Spatial reuse TDMA is an access scheme for multi-hop radio networks. The idea is to increase capacity by reusing time slots when possible. A time slot can be reused when the radio units are geographically separated such that small interference is obtained. Of course, spatially reusing the channel resource can be applied to other access schemes such as FDMA and CDMA. Here, we present an algorithm for spatial reuse in a TDMA framework, considering the total interference in the network. In multi-hop networks, the traffic load can vary considerably from link to link. The algorithm presented can be modified to assign more time slots to links with heavy traffic loads. Our simulation results show that the average delay can be decreased considerably by taking the traffic load into consideration in a STDMA scheme and by modeling the total interference in the network.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"7 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":"124195076","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: 86
Perspectives on 3G system development [mobile communications] 3G系统发展展望[移动通信]
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.1998.733592
Tero Ojanperä
{"title":"Perspectives on 3G system development [mobile communications]","authors":"Tero Ojanperä","doi":"10.1109/PIMRC.1998.733592","DOIUrl":"https://doi.org/10.1109/PIMRC.1998.733592","url":null,"abstract":"This paper presents different perspectives on the development of third generation (3G) mobile communications. Historical, technical, market, regulatory, and future perspectives are given.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"12 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":"116933356","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
An all-digital frequency synchronization scheme for OFDM systems OFDM系统的全数字频率同步方案
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.1997.630922
Zhenhong Li, A. Mämmelä
{"title":"An all-digital frequency synchronization scheme for OFDM systems","authors":"Zhenhong Li, A. Mämmelä","doi":"10.1109/PIMRC.1997.630922","DOIUrl":"https://doi.org/10.1109/PIMRC.1997.630922","url":null,"abstract":"The main purpose of this paper is to study the frequency synchronization problem in OFDM systems. A new frequency synchronization method is achieved by means of an all-digital synchronization loop including acquisition and tracking modes. The frequency offset is estimated only once per frame. The acquisition algorithm is based on periodically inserted reference symbols, and the tracking algorithm on the cyclic prefix of the OFDM symbols. The algorithm performance is assessed in an AWGN channel with a low SNR value and in the presence of a timing inaccuracy. The simulations show that the algorithm is accurate and the suggested frequency synchronization scheme works well.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"32 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":"126524635","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
Research on Rate Allocation Schemes for the Reverse Link in CDMA2000 System CDMA2000系统中反向链路速率分配方案研究
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.2006.254206
Bingzhang Liu, Xin Zhang, Dacheng Yang
{"title":"Research on Rate Allocation Schemes for the Reverse Link in CDMA2000 System","authors":"Bingzhang Liu, Xin Zhang, Dacheng Yang","doi":"10.1109/PIMRC.2006.254206","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.254206","url":null,"abstract":"This paper focuses on the rate allocation schemes on the reverse link (RL) of cdma2000 IxEV-DV system. Two schemes, the time-scheduled (TS) scheme and the rate-controlled (RC) scheme are described and compared. Based on their pros and cons, we propose a modified version to bring together the merits of the two schemes. The proposed scheme, which is called multi-step-up RC scheme, can enable a mobile to increase its rate by multiple steps when needed. The TS scheme, RC scheme and the proposed scheme are respectively simulated on our cdma2000 IxEV-DV Release D reverse link system level simulation platform. Our simulation results show that the proposed scheme can efficiently utilize the radio resource and improve the user's QoS performance of delay. In addition, the performance gain is achieved using the same amount of signaling overhead as that of RC scheme, which is much less than that of TS scheme. The idea of the proposed scheme can be applied to other similar communication systems","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"81 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":"122726311","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
Power control in cellular radio systems with multicast traffic 具有多播业务的蜂窝无线电系统中的功率控制
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.1998.734694
Carl-Gustav Löf
{"title":"Power control in cellular radio systems with multicast traffic","authors":"Carl-Gustav Löf","doi":"10.1109/PIMRC.1998.734694","DOIUrl":"https://doi.org/10.1109/PIMRC.1998.734694","url":null,"abstract":"The number of applications where a subset of all receivers is addressed with the same information, so called multicasting, grow in most types of communication networks. In wireless personal communication systems, an effective integration of multicast services is required both from radio resource utilization and application point of view. We propose a combined centralized power control and connection removal algorithm for cellular radio systems with multicast services, utilizing physical multicasting. The aim is to obtain acceptable signal-to-interference-ratios (SIR) in all active communication links. The numerical results show that the power control method we propose outperforms a reference system using fixed transmitter power.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"11 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":"122290879","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
Research on Modified Structure of Turbo-Blast System 涡轮鼓风系统改进型结构研究
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.2006.254351
Rui Wang, He Wang, C. Fan, Xin Zhang, Dacheng Yang
{"title":"Research on Modified Structure of Turbo-Blast System","authors":"Rui Wang, He Wang, C. Fan, Xin Zhang, Dacheng Yang","doi":"10.1109/PIMRC.2006.254351","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.254351","url":null,"abstract":"In this paper, a new MIMO system named turbo-BLAST which utilizes the turbo principle is investigated. Meanwhile, we propose the idea of using advanced channel codes in the system , such as turbo code and TCM (trellis code modulation) code. New algorithm of detector is deducted in order to fit for non-constant envelope modulation. There new structures are proposed: a modified structure named selective feedback are proposed to reduce the time-delay of turbo-BLAST for high-order modulation, the decoding algorithm of trellis code modulation is modified to provide the detector with extrinsic information, and the new decoder structure of turbo code is also given. The simulation results show that selective feedback can achieve better performance, and the structure using turbo code can achieve better performance and faster convergence rate in high-order modulation","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"34 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":"127846796","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
An improved channel estimation scheme for OFDM systems by tracking the subspace 基于子空间跟踪的OFDM信道估计改进方案
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.2003.1260283
Yue Li, Zi Li, Yueming Cai, Youyun Xu
{"title":"An improved channel estimation scheme for OFDM systems by tracking the subspace","authors":"Yue Li, Zi Li, Yueming Cai, Youyun Xu","doi":"10.1109/PIMRC.2003.1260283","DOIUrl":"https://doi.org/10.1109/PIMRC.2003.1260283","url":null,"abstract":"Channel parameters in OFDM systems over fading channels are generally obtained by transmitting pilot symbols in given positions of the time-frequency grid. The pilot-based method usually involves the LS estimation step on the pilot subcarriers and the interpolation step over the entire time-frequency grid. Increasing the accuracy of the pilot estimation will accordingly increase the precision in the interpolation step. This can be achieved by subspace tracking method. We propose in this paper an improved subspace-tracking algorithm by the Givens plane rotation based delay-subspace tracking and the RLS filtering based amplitude tracking. Performed on a parameterized model of the channel, simulations prove that our channel estimation is more robust and accurate while the complexity of the algorithm is low.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"32 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":"114798567","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
An Aggregated Delay|Bandwidth Star Scheme for Admission Control 一种允许控制的聚合延迟/带宽星型方案
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.2007.4394156
W. Htira, O. Dugeon, M. Diaz
{"title":"An Aggregated Delay|Bandwidth Star Scheme for Admission Control","authors":"W. Htira, O. Dugeon, M. Diaz","doi":"10.1109/PIMRC.2007.4394156","DOIUrl":"https://doi.org/10.1109/PIMRC.2007.4394156","url":null,"abstract":"Call admission control (CAC) is a crucial element for providing quality of service (QoS) guarantees in a network. Performance deteriorates rapidly within large scale networks. Compared to measurement-based admission control approaches, the performance degradation can be important in the case of parameter- based approaches due to their dependence to the network topology. So, as networks grow in size, the collection and the maintenance of the resources reservation status which must be maintained coherent in the database become difficult, if not impossible. In this paper, we propose a novel admission control approach based on an aggregated scheme of the topology. This approach improves the traditional parameter-based admission control techniques. Simulation results show that our proposed admission control scheme achieves very good performances in the reduction of the memory space utilization and the algorithm complexity.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"87 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":"126189117","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: 2
An in-network caching scheme based on betweenness and content popularity prediction in content-centric networking 在以内容为中心的网络中，一种基于间隔和内容流行度预测的网络内缓存方案
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.2016.7794943
Xiaoping Zhou, Min Zhao, Muqing Wu
{"title":"An in-network caching scheme based on betweenness and content popularity prediction in content-centric networking","authors":"Xiaoping Zhou, Min Zhao, Muqing Wu","doi":"10.1109/PIMRC.2016.7794943","DOIUrl":"https://doi.org/10.1109/PIMRC.2016.7794943","url":null,"abstract":"Content-centric Networking (CCN) is considered as a promising architecture to achieve reliable content distribution at large scale. One of the key research items of CCN is cache strategy, and most of the existing approaches consider little of the dynamicity of user interests. In this paper, we present a new cache policy, named as the betweenness and content popularity prediction (BEACON). Betweenness measures the importance of nodes in the whole network, and content popularity represents the user preference for service contents. By taking into account both network topology characteristics and flow distribution, the load of network and server is optimized. Moreover, we use the gray model to predict the content popularity, tracking the trend of user interest. The simulation results demonstrate that the BEACON scheme can effectively improve the cache hit rate, shorten access distance and reduce the delay of transmission.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"21 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":"126242980","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: 11
Generalized soft decision metric generation for MPSK/MQAM without noise variance knowledge 无噪声方差的MPSK/MQAM广义软决策度量生成
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.2003.1260265
Qiang Li, Peng Du, G. Bi
{"title":"Generalized soft decision metric generation for MPSK/MQAM without noise variance knowledge","authors":"Qiang Li, Peng Du, G. Bi","doi":"10.1109/PIMRC.2003.1260265","DOIUrl":"https://doi.org/10.1109/PIMRC.2003.1260265","url":null,"abstract":"In this paper, a new simplified soft decision metric, without noise variance knowledge, is derived. By recognizing that it is simply a distance metric in Euclidian space, we further generalize it to p-norm. Performance comparisons are presented for LDPC coded 8PSK/16QAM with different parameters. Simulation results show that, when compared with the simplified soft decision metric reported in [F. Tosato et al. 2002], there is no performance loss with our proposed generalized soft decision metric. Moreover, it is unnecessary to estimate noise variance at the channel output, which greatly facilitates practical implementation. Further simulation indicates that, at high signal to noise ratio, a small performance gain can be obtained with p a bit less than 2.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"16 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":"121658754","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
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