2016 1st International Workshop on Link- and System Level Simulations (IWSLS)最新文献

Dynamic scheduling in system-level simulations for multi-hop D2D communications in LTE networks LTE网络中多跳D2D通信系统级仿真中的动态调度

2016 1st International Workshop on Link- and System Level Simulations (IWSLS) Pub Date : 2016-07-01 DOI: 10.1109/IWSLS.2016.7801584

Lili Wei, A. Papathanassiou, Qian Li, Geng Wu

{"title":"Dynamic scheduling in system-level simulations for multi-hop D2D communications in LTE networks","authors":"Lili Wei, A. Papathanassiou, Qian Li, Geng Wu","doi":"10.1109/IWSLS.2016.7801584","DOIUrl":"https://doi.org/10.1109/IWSLS.2016.7801584","url":null,"abstract":"Device-to-device (D2D) communication has attracted great attention and becomes a promising technology for future wireless networks. Besides two UEs communicating directly without going through the base station, D2D communication can be further broadened to multi-hop D2D communication, for example, a UE may serve as a relay for some D2D pair. In this work, we perform system-level simulation studies on multihop D2D communications overlay LTE networks with intra-cell and inter-cell interference from other D2D transmissions. We investigate dynamic scheduling for multi-hop D2D according to instantaneous channel and interference situation based on proportional fair metrics. Dynamic scheduling is a compromise between average and edge spectral efficiency, since using relays can increase edge performance but may decrease the average spectral efficiency as they consume more resources than direct D2D. In simulation studies, we can see that multi-hop D2D with dynamic scheduling outperforms direct D2D and multi-hop D2D with fixed scheduling for large D2D distance, and also increases edge spectral efficiency dramatically for small D2D distance with the expense of a little average spectral efficiency decrease.","PeriodicalId":138269,"journal":{"name":"2016 1st International Workshop on Link- and System Level Simulations (IWSLS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115877814","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

Filter bank multi carrier based MIMO system for 5G wireless communication 基于滤波器组多载波的5G无线通信MIMO系统

2016 1st International Workshop on Link- and System Level Simulations (IWSLS) Pub Date : 2016-07-01 DOI: 10.1109/IWSLS.2016.7801583

Atif Basheer, A. Habib

{"title":"Filter bank multi carrier based MIMO system for 5G wireless communication","authors":"Atif Basheer, A. Habib","doi":"10.1109/IWSLS.2016.7801583","DOIUrl":"https://doi.org/10.1109/IWSLS.2016.7801583","url":null,"abstract":"Filter Bank Multicarrier (FBMC) transmission technique is a primary candidate for upcoming wireless communication standard 5G. It is also considered as an alternative to the famous Orthogonal Frequency Division Multiplexing (OFDM). To ensure interference free communication, OFDM utilizes Cyclic Prefix (CP) along with a rectangular pulse shaped filter. Which renders OFDM spectrally inefficient, when incorporated over large arrays of antennas. The FBMC can overcome this problem by using a different modulation scheme and a specialized prototype filter. We started this study by presenting a detailed analysis of an FBMC system. Furthermore, the FBMC system is interfaced with a Multiple Input Multiple Output (MIMO) antenna system with different antenna array sizes. We begin with a 2 X 2 antenna array and then we perform experiments with 8, 16 and 32 transmit and receive antennas. Signaling and channel specifications are different for each case. The performance of each system is measured using Zero forcing (ZF) and Minimum Mean Square Error (MMSE) equalizers. Bit Error Rate (BER) is measured against normalized Signal to Noise Ratio (SNR) or Eb/No for each system. The results of this study show that FBMC with MIMO depicts a satisfactory improvement in performance. For the 2 X 2 MIMO system MMSE outperforms the ZF equalizer. Moreover, a significant decrease in BER was observed as the array size was increased.","PeriodicalId":138269,"journal":{"name":"2016 1st International Workshop on Link- and System Level Simulations (IWSLS)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123046978","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

Efficient multi-user MIMO transmissions in the LTE-A uplink LTE-A上行链路中高效的多用户MIMO传输

2016 1st International Workshop on Link- and System Level Simulations (IWSLS) Pub Date : 2016-07-01 DOI: 10.1109/IWSLS.2016.7801581

Lukas Nagel, Stefan Pratschner, Stefan Schwarz, M. Rupp

{"title":"Efficient multi-user MIMO transmissions in the LTE-A uplink","authors":"Lukas Nagel, Stefan Pratschner, Stefan Schwarz, M. Rupp","doi":"10.1109/IWSLS.2016.7801581","DOIUrl":"https://doi.org/10.1109/IWSLS.2016.7801581","url":null,"abstract":"Single-User Multiple-Input Multiple-Output (MIMO) transmissions are possible since Rel. 10 of 3GPP LTE-A. The Closed Loop Spatial Multiplexing (CLSM) transmission mode enables up to a four fold increase in spectral efficiency compared to Rel. 8, yet it requires complex User Equipment (UE) hardware supporting more than one transmit antenna. The closed loop spatial multiplexing transmission mode enables up to a four fold increase in spectral efficiency compared to Rel. 8, yet it requires complex UE hardware supporting more than one transmit antenna. As it is likely that the Base Station (BS) has more receive antennas than the UE transmit antennas, employing Multi-User (MU) MIMO transmissions in the uplink can lead to significant improvement in cell throughput. We formulate MU MIMO transmissions with linear receivers as a compact matrix system model. Based on our model we present a post-equalization SINR equation, allowing the calculation of a quantized feedback parameter, the Channel Quality Indicator (CQI) value. Within this framework we reveal possible MU gains through known scheduling algorithms although the frequency selective channel is approximated by its arithmetic mean.","PeriodicalId":138269,"journal":{"name":"2016 1st International Workshop on Link- and System Level Simulations (IWSLS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132477391","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

The GTEC 5G link-level simulator GTEC 5G链路级模拟器

2016 1st International Workshop on Link- and System Level Simulations (IWSLS) Pub Date : 2016-07-01 DOI: 10.1109/IWSLS.2016.7801585

Tomás Domínguez-Bolaño, J. Rodríguez-Piñeiro, J. García-Naya, L. Castedo

{"title":"The GTEC 5G link-level simulator","authors":"Tomás Domínguez-Bolaño, J. Rodríguez-Piñeiro, J. García-Naya, L. Castedo","doi":"10.1109/IWSLS.2016.7801585","DOIUrl":"https://doi.org/10.1109/IWSLS.2016.7801585","url":null,"abstract":"The rapid evolution of nowadays wireless communication systems constitutes a challenge for the versatile and flexible evaluation of transmissions under different scenarios. In order to evaluate the current fourth generation (4G) and future fifth generation (5G) communication techniques, a modular link-level simulator was developed at the GTEC group of the University of A Coruña. In this paper, the structure of the simulator as well as how to use it are presented in detail. The simulator allows for performing link layer simulations both for Orthogonal Frequency-Division Multiplexing (OFDM) and Filter Bank Multicarrier (FBMC) signals. It includes fully-functional transmitter and receiver implementations, as well as different channel models and functions for processing the obtained results. Moreover, we show also that the simulator is fully integrated with the GTEC testbed, enabling not only for performing simulation-based evaluations, but also considering over-the-air measurements. Hence, the GTEC 5G Simulator constitutes a valuable tool for evaluating new communication systems in a versatile and flexible way. Some exemplary results obtained both by simulations and through measurements are included.","PeriodicalId":138269,"journal":{"name":"2016 1st International Workshop on Link- and System Level Simulations (IWSLS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124506017","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

Four-dimensional network simulation of direct air to ground LTE networks 直接空对地LTE网络的四维网络仿真

2016 1st International Workshop on Link- and System Level Simulations (IWSLS) Pub Date : 2016-07-01 DOI: 10.1109/IWSLS.2016.7801575

Mitsuo Sakamoto, Shohei Kawato

{"title":"Four-dimensional network simulation of direct air to ground LTE networks","authors":"Mitsuo Sakamoto, Shohei Kawato","doi":"10.1109/IWSLS.2016.7801575","DOIUrl":"https://doi.org/10.1109/IWSLS.2016.7801575","url":null,"abstract":"In recent times in-flight Broadband Internet connection service is becoming more common. In Japan, most in-flight connectivity utilizes a satellite backhaul system. However, the satellite system tends to be very bulky and expensive for short-and medium-haul continental flights. The satellite system has limited capacity, especially serving a large number of continental aircraft in a limited geographical area. This, it produces a large transmission latency, that affects the real-time service quality. The solution is a Direct Air-to-Ground (DA2G) network based on Long Term Evolution (LTE) technology. The DA2G network deploys ground stations that are connected with aircraft flying overhead, thus providing an ultra-broadband backhaul infrastructure. The European Conference of Postal and Telecommunications Administrations (CEPT) has explored the potential of DA2G networks based on LTE with pencil beamforming in an attempt to improve the link performance. Here, based on the CEPT reports, this paper discusses the broadcasting and traffic channel coverage without pencil beamforming to keep the compatibility of conventional LTE. In addition, a hierarchical antenna architecture is proposed for covering all flight cruising altitudes of 4,000 - 12,000 m using conventional LTE. Moreover, a four-dimensional network simulation of DA2G LTE networks is introduced. The merits of the proposed antenna architecture are verified using a developed four-dimensional network simulator.","PeriodicalId":138269,"journal":{"name":"2016 1st International Workshop on Link- and System Level Simulations (IWSLS)","volume":"64 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122413723","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

Phy layer abstraction for SU-MIMO LTE system employing parallel interference-aware detection 采用并行干扰感知检测的SU-MIMO LTE系统物理层抽象

2016 1st International Workshop on Link- and System Level Simulations (IWSLS) Pub Date : 2016-07-01 DOI: 10.1109/IWSLS.2016.7801578

E. Lukashova, F. Kaltenberger, R. Knopp, C. Bonnet

引用次数: 2

Using system-level simulation to evaluate downlink throughput performance in LTE-A networks with clustered user deployments 使用系统级仿真来评估具有集群用户部署的LTE-A网络中的下行链路吞吐量性能

2016 1st International Workshop on Link- and System Level Simulations (IWSLS) Pub Date : 2016-07-01 DOI: 10.1109/IWSLS.2016.7801577

J. O. Olaifa, D. Arifler

{"title":"Using system-level simulation to evaluate downlink throughput performance in LTE-A networks with clustered user deployments","authors":"J. O. Olaifa, D. Arifler","doi":"10.1109/IWSLS.2016.7801577","DOIUrl":"https://doi.org/10.1109/IWSLS.2016.7801577","url":null,"abstract":"Downlink throughput performance in Long Term Evolution - Advanced (LTE-A) networks has been widely investigated by many simulation studies. However, these studies generally assume that users are uniformly distributed in regularly arranged hexagonal cells. Analytical models and methods of stochastic geometry have been applied to wireless networks to consider the effects of spatial configuration of nodes and base stations on network performance by abstracting away many details of the systems. As such, comprehensive studies of the effects of spatial factors on throughput performance using standard-compliant, open-source software that simulates many details of LTE-A networks are still scarce. In this paper, we use the Vienna LTE-A Downlink System Level Simulator to re-evaluate the validity of usual throughput performance metrics under various spatial deployment scenarios and employ statistical methods to determine the significance of performance observations. Our primary aim is to show that clustered user deployments around a base station exhibit significantly different throughput performance compared to the case of uniformly distributed users throughout the cell. This is important since in practice, base stations are deployed in areas of high user density. In addition, we show that the most widely used scheduling scheme in cellular networks, namely the proportional fair scheduling, may lose its performance advantage over round robin scheduling when users are clustered around the base station. These findings are expected to have implications on the design and deployment of next generation cellular networks.","PeriodicalId":138269,"journal":{"name":"2016 1st International Workshop on Link- and System Level Simulations (IWSLS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122934384","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

Modeling unicast device-to-device communications with simuLTE 用simuLTE对单播设备到设备通信进行建模

2016 1st International Workshop on Link- and System Level Simulations (IWSLS) Pub Date : 2016-07-01 DOI: 10.1109/IWSLS.2016.7801579

A. Virdis, G. Nardini, G. Stea

引用次数: 23

Geometric average-based fast-converging proportional fair scheduling for LTE downlink transmissions 基于几何平均的LTE下行传输快速收敛比例公平调度

2016 1st International Workshop on Link- and System Level Simulations (IWSLS) Pub Date : 2016-07-01 DOI: 10.1109/IWSLS.2016.7801574

Mahir Ayhan, Luca Zappaterra, Hyeong-Ah Choi

{"title":"Geometric average-based fast-converging proportional fair scheduling for LTE downlink transmissions","authors":"Mahir Ayhan, Luca Zappaterra, Hyeong-Ah Choi","doi":"10.1109/IWSLS.2016.7801574","DOIUrl":"https://doi.org/10.1109/IWSLS.2016.7801574","url":null,"abstract":"Long Term Evolution (LTE) wireless communication system has adopted Orthogonal Frequency Division Multiple Access (OFDMA) technology to provide downlink transmissions to multiple User Equipment (UE) in a single transmission time interval. In OFDMA, UEs provide quantized channel quality information, called channel quality indicator (CQI), to the base station. CQI feedback is then used at the base station to choose which UE to be scheduled and which modulation and coding scheme (MCS) for the selected UE to be used in downlink transmissions. Each UE sends averaged CQI over all subcarriers instead of sending the CQI of each subcarrier to minimize feedback overhead. As a result, only one MCS is applied at the base station for multiple subcarriers intended for the same UE. This can cause significant throughput degradation, especially in low SNR regions in which the actual CQI of each subcarrier may vary significantly. Our experimental results show that the two well-known scheduling algorithms, namely Best CQI and Proportional Fair Scheduling (PFS), fail to provide spectrum efficiency and/or fairness among UEs. These algorithms tend to provide a large fraction of bandwidth to a single UE; hence, the UE fails to demodulate transmitted data to which only one modulation scheme was applied. In this paper, we propose a novel scheduling algorithm that achieves better throughput performance, while providing more fairness among UEs than existing solutions in both high and low SNR environments. The proposed algorithm improves cell throughput by 66% over the PFS when UEs experience various SNR values. When UEs undergo similar SNR values, the system throughput can be improved by more than 120% over BestCQI and by almost 60% over PFS. Extensive simulations validate that our proposed solution also significantly enhance Block Error ratio (BLER) in addition to network throughput and fairness.","PeriodicalId":138269,"journal":{"name":"2016 1st International Workshop on Link- and System Level Simulations (IWSLS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126713613","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

Link-level simulator for WLAN networks 链路级模拟器用于WLAN网络

2016 1st International Workshop on Link- and System Level Simulations (IWSLS) Pub Date : 2016-07-01 DOI: 10.1109/IWSLS.2016.7801576

Jiří Miloš, L. Polak, M. Slanina, T. Kratochvil

引用次数: 7