Pub Date : 2014-05-18DOI: 10.1109/VTCSpring.2014.7022940
Yuan Liu, Fei Yang, Sihai Zhang, Wuyang Zhou
The forwarding activities of Pocket Switched Network (PSN) under social scene has attracted increasing attention, which are deeply affected by the social features of PSN nodes, especially the social network structure and characteristics of selfishness among nodes that jointly construct their behavior model under an opportunistic forwarding environment. Through both analysis and simulation, we investigate how social network structure and node selfishness influence data forwarding activities of PSN nodes based on our proposed contact-and-cooperative model. Simulation results obtained by PROPHET algorithm show that PSN forwarding performance, including delay time and packet delivery ratio, are improved by the introduction of social network structure. Further, the differentiation of node selfishness according to nodes' relationships on social structure level also displays intrinsic benefit in network performance in the presence of the node selfish behavior that is inevitable in real world. The results also show that hub nodes in the network, which undertake heavy relay mission, may play a more important role in forwarding activities under our model with social selfishness compared with unconditionally cooperative cases.
{"title":"Impact of Social Features on the Performance of Pocket Switched Network","authors":"Yuan Liu, Fei Yang, Sihai Zhang, Wuyang Zhou","doi":"10.1109/VTCSpring.2014.7022940","DOIUrl":"https://doi.org/10.1109/VTCSpring.2014.7022940","url":null,"abstract":"The forwarding activities of Pocket Switched Network (PSN) under social scene has attracted increasing attention, which are deeply affected by the social features of PSN nodes, especially the social network structure and characteristics of selfishness among nodes that jointly construct their behavior model under an opportunistic forwarding environment. Through both analysis and simulation, we investigate how social network structure and node selfishness influence data forwarding activities of PSN nodes based on our proposed contact-and-cooperative model. Simulation results obtained by PROPHET algorithm show that PSN forwarding performance, including delay time and packet delivery ratio, are improved by the introduction of social network structure. Further, the differentiation of node selfishness according to nodes' relationships on social structure level also displays intrinsic benefit in network performance in the presence of the node selfish behavior that is inevitable in real world. The results also show that hub nodes in the network, which undertake heavy relay mission, may play a more important role in forwarding activities under our model with social selfishness compared with unconditionally cooperative cases.","PeriodicalId":405517,"journal":{"name":"2014 IEEE 79th Vehicular Technology Conference (VTC Spring)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133485034","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}
Pub Date : 2014-05-18DOI: 10.1109/VTCSpring.2014.7022854
Yasuhiro Ikeda, H. Saito, R. Kawahara
Macroscopic diversity (macro-diversity) techniques, such as coordinated multi-point transmission in LTE networks, are attracting attention for reducing the error rate of wireless transmission. We propose a cell-planning algorithm with macro- diversity when possible locations of cells are given. To define a cell, we focus on the desired received signal power of uplink determined by fractional power control. We also propose a signal-to-interference-plus-noise ratio (SINR) evaluation method under the obtained cell-deployment pattern, which takes into account frequency scheduling used in LTE networks. Numerical results show that by optimally deploying the cells, we can reduce the required number of cells to cover the defined domain by up to 30% compared to when the cells are selected greedily. Moreover, the SINR evaluation results suggest that reducing the required cells to cover the domain improves uplink SINR at the cell edge.
{"title":"Cell Planning with Macroscopic Diversity: Optimal Cell Deployment and SINR Evaluation under Frequency Scheduling","authors":"Yasuhiro Ikeda, H. Saito, R. Kawahara","doi":"10.1109/VTCSpring.2014.7022854","DOIUrl":"https://doi.org/10.1109/VTCSpring.2014.7022854","url":null,"abstract":"Macroscopic diversity (macro-diversity) techniques, such as coordinated multi-point transmission in LTE networks, are attracting attention for reducing the error rate of wireless transmission. We propose a cell-planning algorithm with macro- diversity when possible locations of cells are given. To define a cell, we focus on the desired received signal power of uplink determined by fractional power control. We also propose a signal-to-interference-plus-noise ratio (SINR) evaluation method under the obtained cell-deployment pattern, which takes into account frequency scheduling used in LTE networks. Numerical results show that by optimally deploying the cells, we can reduce the required number of cells to cover the defined domain by up to 30% compared to when the cells are selected greedily. Moreover, the SINR evaluation results suggest that reducing the required cells to cover the domain improves uplink SINR at the cell edge.","PeriodicalId":405517,"journal":{"name":"2014 IEEE 79th Vehicular Technology Conference (VTC Spring)","volume":"298 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133546044","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}
Pub Date : 2014-05-18DOI: 10.1109/VTCSpring.2014.7023125
Seokheon Cho, R. Cruz, R. Rao, Anush Badii
There have been many studies for modeling vehicular traffic flow using fluid models. However, these previous approaches do not accommodate realistic models for traffic density, flow, and velocity. The existing models also fail to uncover the relationships among energy efficiency, capacity, and safety. We investigate traffic networks from a system-level perspective. In result, we provide a time-gap based mathematical traffic model for vehicular traffic flow on highways. Our model explains the widely known triangular fundamental diagram, which represents vehicular traffic systems with the three primary parameters: maximum free-flow velocity, a typical safety length of vehicles, and a mean value of the time-gap of the traffic data during congested conditions. This result is also well validated with measured traffic data using least squares matching and with previous research outcomes about the propagation velocity. In addition, we suggest two distinct analysis techniques to estimate the time-gap from the traffic data measured on highways.
{"title":"Time-Gap Based Traffic Model for Vehicular Traffic Flow","authors":"Seokheon Cho, R. Cruz, R. Rao, Anush Badii","doi":"10.1109/VTCSpring.2014.7023125","DOIUrl":"https://doi.org/10.1109/VTCSpring.2014.7023125","url":null,"abstract":"There have been many studies for modeling vehicular traffic flow using fluid models. However, these previous approaches do not accommodate realistic models for traffic density, flow, and velocity. The existing models also fail to uncover the relationships among energy efficiency, capacity, and safety. We investigate traffic networks from a system-level perspective. In result, we provide a time-gap based mathematical traffic model for vehicular traffic flow on highways. Our model explains the widely known triangular fundamental diagram, which represents vehicular traffic systems with the three primary parameters: maximum free-flow velocity, a typical safety length of vehicles, and a mean value of the time-gap of the traffic data during congested conditions. This result is also well validated with measured traffic data using least squares matching and with previous research outcomes about the propagation velocity. In addition, we suggest two distinct analysis techniques to estimate the time-gap from the traffic data measured on highways.","PeriodicalId":405517,"journal":{"name":"2014 IEEE 79th Vehicular Technology Conference (VTC Spring)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132139184","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}
Pub Date : 2014-05-18DOI: 10.1109/VTCSpring.2014.7023030
Yaqiao Luo, Kun Xu
In this paper, we focus on designing an impedance transformer with two sections and capable of achieving matching at two arbitrary frequencies. Specifically, the problem is formulated as minimizing the reflection coefficient by finding the optimal value of characteristic impedance and line length for the two section transmission line under the constraints of limited value for characteristic impedance. Using Convex Optimization and Steepest Descend Algorithm, we successfully find the optimal parameters for the transmission line. Simulation result shows that this algorithm can achieve reflection coefficient lower than 0.001 at the transmission frequency in GSM system while still guaranteeing a promising bandwidth of 70.6MHz.
{"title":"Optimization Algorithms for Designing a Two-Section Dual-Band Transformer","authors":"Yaqiao Luo, Kun Xu","doi":"10.1109/VTCSpring.2014.7023030","DOIUrl":"https://doi.org/10.1109/VTCSpring.2014.7023030","url":null,"abstract":"In this paper, we focus on designing an impedance transformer with two sections and capable of achieving matching at two arbitrary frequencies. Specifically, the problem is formulated as minimizing the reflection coefficient by finding the optimal value of characteristic impedance and line length for the two section transmission line under the constraints of limited value for characteristic impedance. Using Convex Optimization and Steepest Descend Algorithm, we successfully find the optimal parameters for the transmission line. Simulation result shows that this algorithm can achieve reflection coefficient lower than 0.001 at the transmission frequency in GSM system while still guaranteeing a promising bandwidth of 70.6MHz.","PeriodicalId":405517,"journal":{"name":"2014 IEEE 79th Vehicular Technology Conference (VTC Spring)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128896563","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}
Pub Date : 2014-05-18DOI: 10.1109/VTCSpring.2014.7022939
A. Asp, Yaroslav Sydorov, Mikko Keskikastari, M. Valkama, J. Niemelä
Use of energy efficient construction materials is increasing all the time due to more and more tightened building regulations, which aim is to reduce overall energy consumption and thereon e.g. mitigate climate change. Energy efficient building materials and structures improve heat insulation but also change the propagation characteristics of radio signals between outdoor and indoors. This paper examines in details such propagation effects and increased levels of outdoor-indoor attenuation in modern apartment buildings, and their impact on mobile cellular networks. In particular, the aim is to compare external wall attenuations for the modern and older apartment buildings and to assess the impact of increased attenuations for the density and planning of cell sites of mobile cellular macro networks. We also demonstrate and evaluate the opportunities for increased indoor signal coverage by using a dedicated aperture installed in building materials.
{"title":"Impact of Modern Construction Materials on Radio Signal Propagation: Practical Measurements and Network Planning Aspects","authors":"A. Asp, Yaroslav Sydorov, Mikko Keskikastari, M. Valkama, J. Niemelä","doi":"10.1109/VTCSpring.2014.7022939","DOIUrl":"https://doi.org/10.1109/VTCSpring.2014.7022939","url":null,"abstract":"Use of energy efficient construction materials is increasing all the time due to more and more tightened building regulations, which aim is to reduce overall energy consumption and thereon e.g. mitigate climate change. Energy efficient building materials and structures improve heat insulation but also change the propagation characteristics of radio signals between outdoor and indoors. This paper examines in details such propagation effects and increased levels of outdoor-indoor attenuation in modern apartment buildings, and their impact on mobile cellular networks. In particular, the aim is to compare external wall attenuations for the modern and older apartment buildings and to assess the impact of increased attenuations for the density and planning of cell sites of mobile cellular macro networks. We also demonstrate and evaluate the opportunities for increased indoor signal coverage by using a dedicated aperture installed in building materials.","PeriodicalId":405517,"journal":{"name":"2014 IEEE 79th Vehicular Technology Conference (VTC Spring)","volume":"243 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134637832","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}
Pub Date : 2014-05-18DOI: 10.1109/VTCSpring.2014.7022987
Murat Karabacak, Dexin Wang, H. Ishii, H. Arslan
Macrocell-assisted small cell concepts, such as "Phantom cell concept" and "soft cell concept", have been proposed previously for interference management, flexible cell planning, and energy saving in dense small cell deployments. These concepts require macrocell involvement to improve links between small cell and user. Since target implementation areas of the concepts are crowded urban areas (e.g. downtown New York City) to satisfy the data need, more realistic simulations are needed to be implemented compared to conventional evaluations. In this paper, as a new approach to urban area LTE simulations, Manhattan grid layout is presented and implemented for mobility performance of Macrocell-assisted small Cell concept. The results show that the macrocell involvement to improve mobility performance gives a great advantage compared to using the conventional mobility solution for dense small cell deployments.
{"title":"Mobility Performance of Macrocell-Assisted Small Cells in Manhattan Model","authors":"Murat Karabacak, Dexin Wang, H. Ishii, H. Arslan","doi":"10.1109/VTCSpring.2014.7022987","DOIUrl":"https://doi.org/10.1109/VTCSpring.2014.7022987","url":null,"abstract":"Macrocell-assisted small cell concepts, such as \"Phantom cell concept\" and \"soft cell concept\", have been proposed previously for interference management, flexible cell planning, and energy saving in dense small cell deployments. These concepts require macrocell involvement to improve links between small cell and user. Since target implementation areas of the concepts are crowded urban areas (e.g. downtown New York City) to satisfy the data need, more realistic simulations are needed to be implemented compared to conventional evaluations. In this paper, as a new approach to urban area LTE simulations, Manhattan grid layout is presented and implemented for mobility performance of Macrocell-assisted small Cell concept. The results show that the macrocell involvement to improve mobility performance gives a great advantage compared to using the conventional mobility solution for dense small cell deployments.","PeriodicalId":405517,"journal":{"name":"2014 IEEE 79th Vehicular Technology Conference (VTC Spring)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133758005","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}
Pub Date : 2014-05-18DOI: 10.1109/VTCSpring.2014.7022827
Shih-Ying Chang, Hsin-Ta Chiao
To facilitate the distribution of video contents, MPEG-DASH (Dynamic Streaming over HTTP) standard is developed to provide standardized manifest format, content format and streaming protocol for adaptive streaming, thereby increasing interoperability of Internet TV services. Although DASH contents are delivered by HTTP without supporting data multicast, some studies shows the possibility of delivering DASH contents over multicast channels for better service scalability or service quality. These studies usually employ scalable videos (e.g., SVC videos) to support efficient adaptive streaming. In this paper, we try to improve the error protection capability for delivering SVC videos by using layer-aware FEC (L-FEC). We apply two conventional L-FEC schemes and found that the improvement in the construction using multiple multicast groups is quite limited. Therefore, we propose a new inter-layer protection scheme with block-based interleaving to improve the performance. We also evaluate the performance of the proposed scheme and compare it with other schemes over real WiFi networks. The result shows that the proposed scheme can improve the source block recovery rate by 0.47%~2.42% when employed in multiple multicast group construction.
为了方便视频内容的分发，开发了MPEG-DASH (Dynamic Streaming over HTTP)标准，为自适应流提供标准化的清单格式、内容格式和流协议，从而提高了互联网电视业务的互操作性。虽然DASH内容是通过HTTP传输的，不支持数据组播，但一些研究表明，为了获得更好的服务可扩展性或服务质量，可以通过组播通道传输DASH内容。这些研究通常使用可扩展的视频(例如，SVC视频)来支持有效的自适应流。在本文中，我们尝试使用层感知FEC (L-FEC)来提高传输SVC视频的错误保护能力。我们应用了两种传统的L-FEC方案，发现使用多播组对结构的改进是非常有限的。因此，我们提出了一种新的基于块交错的层间保护方案来提高性能。我们还评估了所提出方案的性能，并将其与真实WiFi网络上的其他方案进行了比较。结果表明，该方案应用于多组播组构建时，源块恢复率可提高0.47%~2.42%。
{"title":"An Inter-Layer Protection Scheme with Block-Based Interleaving for MPEG-DASH over WiFi Multicast","authors":"Shih-Ying Chang, Hsin-Ta Chiao","doi":"10.1109/VTCSpring.2014.7022827","DOIUrl":"https://doi.org/10.1109/VTCSpring.2014.7022827","url":null,"abstract":"To facilitate the distribution of video contents, MPEG-DASH (Dynamic Streaming over HTTP) standard is developed to provide standardized manifest format, content format and streaming protocol for adaptive streaming, thereby increasing interoperability of Internet TV services. Although DASH contents are delivered by HTTP without supporting data multicast, some studies shows the possibility of delivering DASH contents over multicast channels for better service scalability or service quality. These studies usually employ scalable videos (e.g., SVC videos) to support efficient adaptive streaming. In this paper, we try to improve the error protection capability for delivering SVC videos by using layer-aware FEC (L-FEC). We apply two conventional L-FEC schemes and found that the improvement in the construction using multiple multicast groups is quite limited. Therefore, we propose a new inter-layer protection scheme with block-based interleaving to improve the performance. We also evaluate the performance of the proposed scheme and compare it with other schemes over real WiFi networks. The result shows that the proposed scheme can improve the source block recovery rate by 0.47%~2.42% when employed in multiple multicast group construction.","PeriodicalId":405517,"journal":{"name":"2014 IEEE 79th Vehicular Technology Conference (VTC Spring)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133787224","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}
Pub Date : 2014-05-18DOI: 10.1109/VTCSpring.2014.7023013
Jinho Choi, J. Ha
Massive multiple-input multiple-output (MIMO) has been actively studied for next generation wireless systems since it can provide high data rate and an improved energy efficiency in multiuser systems using large antenna arrays at base stations (BSs). While massive MIMO has various advantages, its perfor- mance is known to be limited by pilot contamination. To mitigate the intercell interference resulting from pilot contamination, pilot contamination precoding (PCP) was proposed for downlink transmissions. For PCP, slow-fading coefficients need to be estimated. In this paper, we study the estimation of slow-fading coefficients. We show that slow-fading coefficients cannot be estimated using the conventional uplink training. Thus, we have proposed amplitude modulated pilot sequences, which allow us to estimate slow-fading coefficients without requiring additional orthogonal pilot sequences.
{"title":"On the Estimation of Slow-Fading Coefficients for Pilot Contamination Precoding","authors":"Jinho Choi, J. Ha","doi":"10.1109/VTCSpring.2014.7023013","DOIUrl":"https://doi.org/10.1109/VTCSpring.2014.7023013","url":null,"abstract":"Massive multiple-input multiple-output (MIMO) has been actively studied for next generation wireless systems since it can provide high data rate and an improved energy efficiency in multiuser systems using large antenna arrays at base stations (BSs). While massive MIMO has various advantages, its perfor- mance is known to be limited by pilot contamination. To mitigate the intercell interference resulting from pilot contamination, pilot contamination precoding (PCP) was proposed for downlink transmissions. For PCP, slow-fading coefficients need to be estimated. In this paper, we study the estimation of slow-fading coefficients. We show that slow-fading coefficients cannot be estimated using the conventional uplink training. Thus, we have proposed amplitude modulated pilot sequences, which allow us to estimate slow-fading coefficients without requiring additional orthogonal pilot sequences.","PeriodicalId":405517,"journal":{"name":"2014 IEEE 79th Vehicular Technology Conference (VTC Spring)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115450676","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}
Pub Date : 2014-05-18DOI: 10.1109/VTCSpring.2014.7022945
Min Chen, P. Tsai
In this paper, explicit channel feedback for MIMO- OFDM systems is investigated. We first show that by exploiting the finite signal space of the channel impulse response, sub-sampling smoothing filter can be designed to achieve both feedback reduction and noise suppression. Secondly, to improve the distribution of the signal to be quantized, it is better to extract the common scaling term from the spectral block to utilize frequency correlation rather than to extract from the spatial block. Simulation results show that the proposed channel feedback scheme with the good sub-sampling smoothing filter brings substantial performance gain and helps the reduction of feedback overhead compared to feedback of the noisy CSI with the grouping strategy. We also discuss the implementation of the feedback encoding block to evaluate the hardware requirements given the feedback throughput constraint. The feedback reduction ratio is also shown to be essential to hardware saving and processing cycles. The proposed scheme has been implemented in 90nm CMOS technology with a maximum operating clock frequency of 160 MHz. We demonstrate the feasibility of the proposed feedback encoding scheme with good performance and efficient hardware.
{"title":"Improvement of Explicit Channel Feedback for MIMO-OFDM WLAN and Its Implementation","authors":"Min Chen, P. Tsai","doi":"10.1109/VTCSpring.2014.7022945","DOIUrl":"https://doi.org/10.1109/VTCSpring.2014.7022945","url":null,"abstract":"In this paper, explicit channel feedback for MIMO- OFDM systems is investigated. We first show that by exploiting the finite signal space of the channel impulse response, sub-sampling smoothing filter can be designed to achieve both feedback reduction and noise suppression. Secondly, to improve the distribution of the signal to be quantized, it is better to extract the common scaling term from the spectral block to utilize frequency correlation rather than to extract from the spatial block. Simulation results show that the proposed channel feedback scheme with the good sub-sampling smoothing filter brings substantial performance gain and helps the reduction of feedback overhead compared to feedback of the noisy CSI with the grouping strategy. We also discuss the implementation of the feedback encoding block to evaluate the hardware requirements given the feedback throughput constraint. The feedback reduction ratio is also shown to be essential to hardware saving and processing cycles. The proposed scheme has been implemented in 90nm CMOS technology with a maximum operating clock frequency of 160 MHz. We demonstrate the feasibility of the proposed feedback encoding scheme with good performance and efficient hardware.","PeriodicalId":405517,"journal":{"name":"2014 IEEE 79th Vehicular Technology Conference (VTC Spring)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114517302","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}
Pub Date : 2014-05-18DOI: 10.1109/VTCSpring.2014.7023067
Vitaly Abdrashitov, Wooseok Nam, Dongwoon Bai
In cellular communications, user equipment (UE, i.e., mobile device)-side interference cancellation (IC) along with multicell coordinated scheduling can significantly reduce the effect of the downlink intercell interference. To aid UE-side IC, a study item, called network-assisted interference cancellation and suppression (NAICS), has been initiated for Long Term Evolution (LTE) Advanced Release 12. Among NAICS receivers, this paper considers a receiver with interference-aware successive decoding (IASD) capability, which is one of the most advanced UE-side IC techniques. The IASD achievable transmission rate is dependent on the interferer transmission rate. Thus, coordination among multiple cells for rate and UE selection would be necessary for the overall network performance enhancement. In this paper, we consider a single dominant interference model and propose an optimal single-user rate selection algorithm based on the belief-propagation framework. In the multi-user-per-cell case we propose several UE and rate selection algorithms and analyze their performance.
{"title":"Rate and UE Selection Algorithms for Interference-Aware Receivers","authors":"Vitaly Abdrashitov, Wooseok Nam, Dongwoon Bai","doi":"10.1109/VTCSpring.2014.7023067","DOIUrl":"https://doi.org/10.1109/VTCSpring.2014.7023067","url":null,"abstract":"In cellular communications, user equipment (UE, i.e., mobile device)-side interference cancellation (IC) along with multicell coordinated scheduling can significantly reduce the effect of the downlink intercell interference. To aid UE-side IC, a study item, called network-assisted interference cancellation and suppression (NAICS), has been initiated for Long Term Evolution (LTE) Advanced Release 12. Among NAICS receivers, this paper considers a receiver with interference-aware successive decoding (IASD) capability, which is one of the most advanced UE-side IC techniques. The IASD achievable transmission rate is dependent on the interferer transmission rate. Thus, coordination among multiple cells for rate and UE selection would be necessary for the overall network performance enhancement. In this paper, we consider a single dominant interference model and propose an optimal single-user rate selection algorithm based on the belief-propagation framework. In the multi-user-per-cell case we propose several UE and rate selection algorithms and analyze their performance.","PeriodicalId":405517,"journal":{"name":"2014 IEEE 79th Vehicular Technology Conference (VTC Spring)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114674162","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}
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