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2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications最新文献

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Utilizing femtocells for Peer-to-Peer file sharing in cellular networks 利用飞蜂窝在蜂窝网络中进行点对点文件共享
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139907
M. Macuha, Yangyang Li, Takuro Sato
{"title":"Utilizing femtocells for Peer-to-Peer file sharing in cellular networks","authors":"M. Macuha, Yangyang Li, Takuro Sato","doi":"10.1109/PIMRC.2011.6139907","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6139907","url":null,"abstract":"Peer-to-Peer file sharing, computing and communication services are widely used by internet community and thoroughly studied by academia. However, main utilization of such services is in the wired networks due to several significant issues in the wireless world like connectivity, bandwidth, battery, unwillingness of cellular operators, etc. In the recent years, offering femtocell access points to subscribers became very promising business model for cellular operator. It also opens space for a variety of new services at the users premises. In this paper, we propose novel architecture for mobile peer-to-peer file sharing based on the femtocell deployment and describe a role of the femtocell in such scenario. We also describe traditional architecture and previously proposed solutions for mobile P2P. We evaluate these approaches and clearly show that the femtocell plays significant role and moves mobile P2P services into reality. We also discuss several current issues which can be easily solved by this architecture.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122531807","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
Channel-aware ALOHA with SINR capture: When is the knowledge of channel not helpful? 带SINR捕获的信道感知ALOHA:什么时候信道知识没有用?
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6140086
Fu-Te Hsu, Hsuan-Jung Su
{"title":"Channel-aware ALOHA with SINR capture: When is the knowledge of channel not helpful?","authors":"Fu-Te Hsu, Hsuan-Jung Su","doi":"10.1109/PIMRC.2011.6140086","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6140086","url":null,"abstract":"We consider an ALOHA network in which users have the knowledge of their own channel state information (CSI). In each time slot, each user transmits its packet to the base station (BS) according to a CSI-dependent transmission scheme. A packet is successfully received if its signal to interference plus noise ratio (SINR) is larger than the capture ratio. We analyze the throughput of this network under a threshold-based transmission scheme in which a user transmits only when its channel gain is higher than a threshold. It is shown that in some cases the conventional ALOHA transmission scheme without CSI may outperform the threshold-based transmission scheme in terms of the maximum possible throughput. We give the condition for this phenomenon and find that this phenomenon will not occur if the BS is capable of receiving three or more packets simultaneously. Besides, we present a transmission scheme in which a user only transmits when its channel gain lies in an interval. This scheme includes the threshold-based one as a special case.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116751512","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
Bayesian and deterministic CRBs for semi-blind channel estimation in SIMO single carrier cyclic prefix systems 基于贝叶斯和确定性crb的SIMO单载波循环前缀系统半盲信道估计
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139792
Samir-Mohamad Omar, D. Slock, O. Bazzi
{"title":"Bayesian and deterministic CRBs for semi-blind channel estimation in SIMO single carrier cyclic prefix systems","authors":"Samir-Mohamad Omar, D. Slock, O. Bazzi","doi":"10.1109/PIMRC.2011.6139792","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6139792","url":null,"abstract":"Traditionally, the performance of different semi-blind channel estimation algorithms has been assessed and compared to a certain lower bound. One of these famous lower bounds that has been extensively used in the literature is the Cramer Rao Bound (CRB). Depending on how we treat the symbols and the channel, different versions of CRB have been derived. There are two possible cases on how to treat the symbols and/or the channel namely, deterministic unknowns or random. Moreover, the symbols are either jointly estimated with the channel or eliminated. In other words, we have six different cases to be handled. In this paper we present the CRBs that exist in the literature and fit to some of these cases and derive the others in the context of SIMO single carrier cyclic prefix systems (SC-CP). On the top of that we present a unified framework that permits to derive all versions of CRBs in a concrete manner. All the derived CRBs are validated numerically by conducting limited Monte-Carlo simulations.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129779729","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
Interference mitigation for body area networks 体域网络的干扰缓解
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139905
Wen-Bin Yang, K. Sayrafian-Pour
{"title":"Interference mitigation for body area networks","authors":"Wen-Bin Yang, K. Sayrafian-Pour","doi":"10.1109/PIMRC.2011.6139905","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6139905","url":null,"abstract":"Due to very low power communication, wireless body area networks are potentially susceptible to interference from other coexisting wireless systems including other BANs that might exist in their vicinity. Using power control to combat this interference might not be efficient. It could also lead to situations with higher levels of interference in the system. On the other hand, interference mitigation can help to not only preserve link quality but also allow more nodes to simultaneously operate. This paper proposes several interference mitigation schemes such as adaptive modulation as well as adaptive data rate and duty cycle for body area networks. Interference Mitigation Factor (IMF) is introduced as a measure to quantify the effectiveness of the proposed schemes.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128780979","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: 49
Base station distributed handover optimization in LTE self-organizing networks LTE自组织网络中基站分布式切换优化
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139958
Lutz Ewe, H. Bakker
{"title":"Base station distributed handover optimization in LTE self-organizing networks","authors":"Lutz Ewe, H. Bakker","doi":"10.1109/PIMRC.2011.6139958","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6139958","url":null,"abstract":"Methods of self-organizing networks (SON) are an essential part of the latest 3rd Generation Partnership Project (3GPP) technology Long Term Evolution (LTE). Among the different identified use cases in standard self-organized handover optimization plays an important role concerning the overall radio network performance. In this paper, we present results as obtained from simulations on a handover optimization procedure performed distributed to base stations of the radio network. Based on a simulation scenario which is characterized by heterogeneous radio conditions between neighboring cells we show the procedure's capability of an efficient and stable modification from initial suboptimal parameter settings towards optimum values of the handover key performance indicators (KPIs).","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128568082","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: 38
Optimizing energy for training vs. data in linearly precoded multiuser sum-rate maximization 在线性预编码的多用户和速率最大化中优化训练与数据的能量
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139751
Adam J. Tenenbaum, R. Adve
{"title":"Optimizing energy for training vs. data in linearly precoded multiuser sum-rate maximization","authors":"Adam J. Tenenbaum, R. Adve","doi":"10.1109/PIMRC.2011.6139751","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6139751","url":null,"abstract":"We consider the problem of optimizing the allocation of available energy across training and data symbols under linear precoding in multiuser downlink systems with imperfect channel state information (CSI). Our figure of merit is the sum rate across all users. This paper derives a lower bound on achievable rate under linear precoding and extends existing precoder designs to the case of imperfect CSI. Optimality and separability results for the energy allocation and precoder design problems that were found previously for sum-MSE minimization are extended to the problem of sum-rate maximization when channels are modelled using uncorrelated Rayleigh block fading with equal variances of the fading coefficients. Simulation results suggest significant improvements in achievable rate under the proposed algorithm.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"2105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129926447","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
Fundamental study on adaptive ACK link control for downloading based on TCP connection in mobile wireless communication 移动无线通信中基于TCP连接的下载自适应ACK链路控制的基础研究
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139943
O. Takyu, Yohsuke Seki, T. Yamasaki, T. Fujii, Y. Umeda, Xiaoqiu Wang, S. Konishi
{"title":"Fundamental study on adaptive ACK link control for downloading based on TCP connection in mobile wireless communication","authors":"O. Takyu, Yohsuke Seki, T. Yamasaki, T. Fujii, Y. Umeda, Xiaoqiu Wang, S. Konishi","doi":"10.1109/PIMRC.2011.6139943","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6139943","url":null,"abstract":"TCP service constructs high quality end-to-end communication link. TCP needs two way communication links. First link and second one are necessary for transmitting data packet from source to destination and ACK packet form destination to source, respectively. Therefore, TCP throughput strictly depends on both links. In wireless communication, the link speed is time selective due to shadowing effect. When the link speed is dramatically changed during the event of downloading, the impact of time selective link speed should be significant. In this paper, we clarify the impact of fluctuating link speed to TCP throughput by network simulator. In addition, we propose the adaptive link speed control of ACK link for achieving large ACK throughput. We also confirm the effect of proposed technique by network simulator.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126810884","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
Increasing secrecy capacity via joint design of cooperative beamforming and jamming 通过协同波束形成和干扰的联合设计提高保密能力
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.3837/tiis.2012.04.005
Xinrong Guan, Yueming Cai, Weiwei Yang, Yunpeng Cheng, Junquan Hu
{"title":"Increasing secrecy capacity via joint design of cooperative beamforming and jamming","authors":"Xinrong Guan, Yueming Cai, Weiwei Yang, Yunpeng Cheng, Junquan Hu","doi":"10.3837/tiis.2012.04.005","DOIUrl":"https://doi.org/10.3837/tiis.2012.04.005","url":null,"abstract":"In this paper, we propose a hybrid cooperative scheme to improve the secrecy rate for a cooperative network in presence of multiple relays. Each relay node transmits a mixed signal consisting of weighted source signal and intentional noise. The problem of power allocation and joint design of beamforming and jamming weights are investigated, and an iterative solution for the secrecy rate maximization problem is presented. The numerical results demonstrate that the proposed hybrid scheme further improves secrecy rate, as compared to traditional cooperative schemes.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127020506","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
Improving downlink multiuser MIMO throughput in LTE-advanced cellular systems 改进LTE-advanced蜂窝系统的下行链路多用户MIMO吞吐量
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139865
G. Yue, N. Prasad, M. Jiang, M. Khojastepour, S. Rangarajan
{"title":"Improving downlink multiuser MIMO throughput in LTE-advanced cellular systems","authors":"G. Yue, N. Prasad, M. Jiang, M. Khojastepour, S. Rangarajan","doi":"10.1109/PIMRC.2011.6139865","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6139865","url":null,"abstract":"In this paper, we consider a downlink (DL) multiuser (MU) multi-input-multi-output (MIMO) channel with linear precoding where the base station simultaneously schedules several user terminals on the same frequency sub-band. We assume imperfect (or quantized) per-user channel state information at the base station and present two types of channel state information (CSI) reports from user terminals, namely, the CSI report that assumes the single-user (SU) MIMO transmissions and the enhanced CSI feedback report that assumes the MU-MIMO transmissions, and in the latter case we consider both uniform and nonuniform power allocations. To improve the MU-MIMO system performance, we propose signal-to-interference-plus-noise ratio (SINR) approximation techniques that utilize the quantized CSI available at the base station and improve the rate matching. We also introduce user pooling techniques which enable a reduction in feedback signaling overhead via per-user feedback mode selection. The proposed techniques also allow unconstrained user pairing at the base station scheduler and hence enable dynamic switching between SU and MU MIMO transmissions. The simulation results demonstrate the efficiency of the proposed MU-MIMO enhancement techniques.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123368849","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
Approaches to enhancing autonomous power control at Femto under co-channel deployment of Macrocell and Femtocell 在Macrocell和Femtocell共信道部署下增强Femto自主功率控制的方法
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6140060
Tao Yang, Lu Zhang
{"title":"Approaches to enhancing autonomous power control at Femto under co-channel deployment of Macrocell and Femtocell","authors":"Tao Yang, Lu Zhang","doi":"10.1109/PIMRC.2011.6140060","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6140060","url":null,"abstract":"For co-channel deployment of Macrocell and indoor Femtocell, in order to mitigate downlink (DL) interference toward user equipments (UEs) of Macrocell, DL power control (PC) at Femto has been considered as the primary inter-cell interference cancelation (ICIC) strategy in 3GPP standardization. Further, currently, the 3GPP-agreed baseline for backhaul is that there is no direct X2/S1 interface between Macrocell and Femtocell, which means the real-time Macro-Femto coordination does not exist. Thus, autonomous triggering of Femto DL ICIC and autonomous PC at Femto have been recommended in 3GPP standardization. In this paper, to enhance the feasibility and performance of Femto's autonomous PC, we firstly design a strategy for Femto to properly determine the self-configured threshold used to autonomously trigger DL ICIC. Then, more importantly, to improve the autonomous parameter-estimation approaches used for implementing autonomous PC at Femto, an effective strategy is designed for Femto to autonomously estimate whether there exists at least one indoor victim Macro UE (MUE). Simulations show that the proposed strategies work well and provide obviously enhanced ICIC benefit for the focused autonomous Femto PC scheme.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"240 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123511530","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
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