2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications最新文献_第6页

Efficient mm-Wave beamforming protocol for group environments 群环境下的高效毫米波波束形成协议

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139658

J. Haapola, S. Kato

引用次数: 0

Opportunistic load and spectrum management for mobile communications energy efficiency 移动通信能源效率的机会负载和频谱管理

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6140046

O. Holland, O. Cabral, F. Velez, Adnan Aijaz, P. Pangalos, H. Aghvami

{"title":"Opportunistic load and spectrum management for mobile communications energy efficiency","authors":"O. Holland, O. Cabral, F. Velez, Adnan Aijaz, P. Pangalos, H. Aghvami","doi":"10.1109/PIMRC.2011.6140046","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6140046","url":null,"abstract":"Dynamic load and spectrum usage management techniques can significantly improve the energy efficiency of mobile communications systems. This paper considers: (i) the opportunistic reallocation of traffic loads between bands to allow radio network equipment in the bands that the traffic is originated from to be powered down, and (ii) the opportunistic selection of more appropriate spectrum based on propagation characteristics to minimize necessary transmission power through improving propagation and/or reducing power leaking into co-channel cells in frequency reuse cases. This paper addresses the simulation of video, FTP and HTTP (web browsing) traffic sources for configurations representing LTE and HSDPA telecommunications networks, and shows that the opportunistic reallocation of users between bands to power down radio equipment achieves a significant saving of 50% or more in from-the-socket power. Furthermore, it shows that the opportunistic reallocation of users/links to minimize transmission power through using more appropriate propagation spectrum leads to a further modest reduction in from-the-socket power consumption.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"23 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":"126594803","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: 9

Performance of LTE in rural areas - Benefits of opportunistic multi-user MIMO LTE在农村地区的性能-机会多用户MIMO的好处

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139864

I. Latif, F. Kaltenberger, Rizwan Ghaffar, R. Knopp, D. Nussbaum, H. Callewaert, G. Scot

{"title":"Performance of LTE in rural areas - Benefits of opportunistic multi-user MIMO","authors":"I. Latif, F. Kaltenberger, Rizwan Ghaffar, R. Knopp, D. Nussbaum, H. Callewaert, G. Scot","doi":"10.1109/PIMRC.2011.6139864","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6139864","url":null,"abstract":"This paper focuses on the performance of LTE in rural areas which is based on a channel measurement campaign conducted with the Eurecom OpenAirInterface LTE testbed at 800MHz. This testbed is based on LTE release 8 PHY layer and implements transmission modes 1 (single antenna - SISO), 2 (transmit diversity), and 6 (single-user MIMO - closed loop rank-1 precoding) in real time. In addition to the throughput recorded from the real modem, the raw channel estimates were stored and used for extrapolating the performance to transmission mode 5 (multi-user MIMO). This extrapolation is done by means of a mutual-information based link-quality model that abstracts the performance of multi-user (MU) MIMO for an interference aware receiver proposed by Ghaffar et al and then the results are compared with the performance of abstraction to transmission mode 2 and 6. The superior performance of MU MIMO mode (with interference aware receiver) over other transmission modes is illustrated and it is shown that if the channel admits then MU MIMO is the preferred option.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"23 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":"133389546","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

Throughput-based incentives for residential femtocells 基于吞吐量的住宅基站激励措施

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139690

Rocco Di Taranto, C. Rosenberg

{"title":"Throughput-based incentives for residential femtocells","authors":"Rocco Di Taranto, C. Rosenberg","doi":"10.1109/PIMRC.2011.6139690","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6139690","url":null,"abstract":"In this paper, a) we investigate a simple throughput based incentive mechanism that could convince home users to install residential femtocells (by offering them a rate which is α > 1 times higher than the average rate received by a user associated with the macro base station), avoid most of the curse of free riders (i.e., selfish users who gets improved service just because others are investing in femto technology) and, at the end, be beneficial to both the users and the operator, and b) we propose a heuristic to compute the resource allocation supporting this incentive scheme. We show that it is cost-effective for a network operator to allocate a pool K of its licensed channels to a certain number of femto cells, even under our incentive mechanism. We first study a static scenario with fixed numbers of macro and femto users. We identify the range of values of the incentive parameter α that can be supported to reward femto users without harming macro users and we quantify the throughput gains for both macro and femto users in different situations. Then, we consider a dynamic scenario, where the number of users and the number of active femtocells change continuously, and we propose a simple and very accurate heuristic for computing K with a minimal amount of information to be collected at the macro base station. Our numerical results show that by using our proposed approach both macro and femto users are better off than in a pure macrocellular scenario.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"53 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":"133483469","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

OFDM-UWB MIMO transceiver implementation in realistic fading channels OFDM-UWB MIMO收发器在实际衰落信道中的实现

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6140094

M. AlJerjawi, Yansheng Xu, R. Bosisio, C. Nerguizian

{"title":"OFDM-UWB MIMO transceiver implementation in realistic fading channels","authors":"M. AlJerjawi, Yansheng Xu, R. Bosisio, C. Nerguizian","doi":"10.1109/PIMRC.2011.6140094","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6140094","url":null,"abstract":"This paper proposes the implementation of an Orthogonal Frequency-Division Multiplexing (OFDM) Ultra-wideband (UWB) multiple-input multiple-output (MIMO) transceiver employing a novel design of Wave-Radio Interferometer (WRI) circuit as a direct down-converter. In order to investigate the performance of the system in a realistic environment, the transceiver is simulated and tested in laboratory using an UWB fading channel defined by the IEEE802.15.3a standard set for high-rate wireless-personal area networks (WPANs). According to these standard specifications, a MATLAB code has been used to generate the channel model for simulations. The same code representing the channel impulse response has been imported to a radio channel emulator to imitate the wireless channel behavior for the laboratory measurements. For the proposed transceiver operating in the frequency range (3.1–4.1GHz), single-input multiple-output (SIMO) and MIMO configurations have been considered. A comparative study between standard channel models (CM) 1 and 4 is presented for each scenario. The results demonstrate a significant performance enhancement when an extra branch is used at the receiver of the SIMO, MIMO systems. This is due to the advantage of added diversity obtained in multiple-output systems.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"62 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":"133272721","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

Self-organized network management functions for relay enhanced LTE-advanced systems 自组织网络管理功能，用于中继增强LTE-advanced系统

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139925

Konstantinos Samdanis, M. Brunner

引用次数: 11

Power savings in mobile networks by dynamic base station sectorization 动态基站分区在移动网络中的电力节约

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139954

L. Hévizi, I. Gódor

引用次数: 10

Usability of apple iPhones for inertial navigation systems 苹果iphone用于惯性导航系统的可用性

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139701

C. Schindhelm, Florian Gschwandtner, Michael Banholzer

{"title":"Usability of apple iPhones for inertial navigation systems","authors":"C. Schindhelm, Florian Gschwandtner, Michael Banholzer","doi":"10.1109/PIMRC.2011.6139701","DOIUrl":"https://doi.org/10.1109/PIMRC.2011.6139701","url":null,"abstract":"In recent decades, many indoor positioning techniques have been researched and some approaches have even been developed into consumer products. Most of them have been deployed into companies which benefit from indoor asset tracking. However, for public buildings like libraries or transportation systems, no direct benefit exists by installing expensive systems. Inertial navigation systems offer a form of positioning which is almost completely independent from external infrastructures, inexpensive and privacy friendly. As prices for sensors continuously drop, mobile terminals, such as cell phones or tablet PCs, are being equipped with various additional components, like GPS, cameras and light sensors, and moreover gyroscopes, compasses and accelerometers integration is also becoming commonplace. These last three components enable inertial navigation systems to calculate the position of the device. In this paper, we selected two devices, the iPhone 3GS and the iPhone 4, to analyze their sensors for usability of an inertial navigation system. For each device a common strapdown algorithm was implemented and varying standard filters applied to clean the output data stream of the sensors. Finally, we present the results, which are diverse according to the devices.","PeriodicalId":262660,"journal":{"name":"2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"311 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":"131668318","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: 16

Coordinated multipoint multiuser-MIMO transmissions over backhaul-constrained mobile access networks 在回程受限的移动接入网上协调多点多用户mimo传输

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139719

Changsoon Choi, L. Scalia, T. Biermann, S. Mizuta

引用次数: 28

Preemption, fairness, and security dynamics in heterogeneous DSA environments 异构DSA环境中的抢占、公平性和安全性动态

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2011-09-01 DOI: 10.1109/PIMRC.2011.6139678

Shabnam Sodagari, T. Clancy

引用次数: 1