Pub Date : 2016-09-01DOI: 10.1109/VTCFall.2016.7880904
Lisu Yu, P. Fan, Zheng Ma, Xianfu Lei, Dageng Chen
In this paper, an optimized codebook design based on rotated angles and extrinsic information transfer (EXIT) chart for a non-orthogonal multiple access scheme, called irregular sparse code multiple access (IrSCMA), is presented. Unlike regular SCMA, in IrSCMA, the defined degree of layer's resource nodes is different, which is beneficial to system performance.It is demonstrated that the new codebook can greatly improve the BER performance especially when the signal-to-noise ratio(SNR) is high, without sacrificing the low detection complexity, compared with the existing codebooks and LDS.
{"title":"An Optimized Design of Irregular SCMA Codebook Based on Rotated Angles and EXIT Chart","authors":"Lisu Yu, P. Fan, Zheng Ma, Xianfu Lei, Dageng Chen","doi":"10.1109/VTCFall.2016.7880904","DOIUrl":"https://doi.org/10.1109/VTCFall.2016.7880904","url":null,"abstract":"In this paper, an optimized codebook design based on rotated angles and extrinsic information transfer (EXIT) chart for a non-orthogonal multiple access scheme, called irregular sparse code multiple access (IrSCMA), is presented. Unlike regular SCMA, in IrSCMA, the defined degree of layer's resource nodes is different, which is beneficial to system performance.It is demonstrated that the new codebook can greatly improve the BER performance especially when the signal-to-noise ratio(SNR) is high, without sacrificing the low detection complexity, compared with the existing codebooks and LDS.","PeriodicalId":6484,"journal":{"name":"2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)","volume":"5 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82968360","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 : 2016-09-01DOI: 10.1109/VTCFall.2016.7880958
H. Zhang, Huan Sun, Tao Yang, Y. Mahe, T. Razban
As fast development in communication field, sub-6 GHz spectrum band becomes ultra crowd. Even though Carrier Aggregation (CA) and higher order modulation used, available spectrum is still the bottleneck of communication speed and network latency. Nowadays, more and more companies and institutes are paying more attention to over 6GHz communication system research. Recently released news indicate frequency points are mainly on 12GHz, 15GHz, 28GHz, 38GHz even 70GHz, and accompanied working bandwidth is about 400MHz to 1GHz. As working band goes higher, antenna conceptions will also be updated. A CPW-Fed monopole antenna working in KU-band with more than 20% relative bandwidth is hereby introduced, which might be a good candidate for future 5G cellular networks and also satellite based DBS reception system. Proposed antenna has small profile lower than λg /4 with dual-polarization, which is thus suitable for base station and mobile device conceptions.
{"title":"Design of a Wideband and Dual-Polarized CPW-Fed Monopole Antenna for Future 5G Communications","authors":"H. Zhang, Huan Sun, Tao Yang, Y. Mahe, T. Razban","doi":"10.1109/VTCFall.2016.7880958","DOIUrl":"https://doi.org/10.1109/VTCFall.2016.7880958","url":null,"abstract":"As fast development in communication field, sub-6 GHz spectrum band becomes ultra crowd. Even though Carrier Aggregation (CA) and higher order modulation used, available spectrum is still the bottleneck of communication speed and network latency. Nowadays, more and more companies and institutes are paying more attention to over 6GHz communication system research. Recently released news indicate frequency points are mainly on 12GHz, 15GHz, 28GHz, 38GHz even 70GHz, and accompanied working bandwidth is about 400MHz to 1GHz. As working band goes higher, antenna conceptions will also be updated. A CPW-Fed monopole antenna working in KU-band with more than 20% relative bandwidth is hereby introduced, which might be a good candidate for future 5G cellular networks and also satellite based DBS reception system. Proposed antenna has small profile lower than λg /4 with dual-polarization, which is thus suitable for base station and mobile device conceptions.","PeriodicalId":6484,"journal":{"name":"2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)","volume":"5 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83209959","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 : 2016-09-01DOI: 10.1109/VTCFall.2016.7880957
Hengyang Shen, Xingguang Wei, Haitao Liu, Yang Liu, K. Zheng
Software Defined Radio (SDR) system has great advantages of high flexibility and better reconfigurability in simulating and verifying the new communication technologies. Among all the SDR systems based on general purpose processor (GPP), OpenAirInterface (OAI) is one of the most comprehensive and competitive open-source SDR systems. Due to the design of signal-thread processing in the system, the user equipment (UE) of OAI still cannot process the vast amounts of data when the bandwidth is up to 20 MHz in the real-time experiments. This paper provides an overview of the system architecture in the real-time experimentation of OAI and analyzes its baseband signal processing. Then, the authors of this paper propose and implement a method of multithread parallel processing on the UE of OAI. Over-the-air experiments are carried out with the proposed method for the purpose of performance evaluation in the real- time wireless environment. Results demonstrate that the proposed method enhances the performance of the OAI system and shows its potential for the fifth generation (5G) technology.
{"title":"Design and Implementation of an LTE System with Multi-Thread Parallel Processing on OpenAirInterface Platform","authors":"Hengyang Shen, Xingguang Wei, Haitao Liu, Yang Liu, K. Zheng","doi":"10.1109/VTCFall.2016.7880957","DOIUrl":"https://doi.org/10.1109/VTCFall.2016.7880957","url":null,"abstract":"Software Defined Radio (SDR) system has great advantages of high flexibility and better reconfigurability in simulating and verifying the new communication technologies. Among all the SDR systems based on general purpose processor (GPP), OpenAirInterface (OAI) is one of the most comprehensive and competitive open-source SDR systems. Due to the design of signal-thread processing in the system, the user equipment (UE) of OAI still cannot process the vast amounts of data when the bandwidth is up to 20 MHz in the real-time experiments. This paper provides an overview of the system architecture in the real-time experimentation of OAI and analyzes its baseband signal processing. Then, the authors of this paper propose and implement a method of multithread parallel processing on the UE of OAI. Over-the-air experiments are carried out with the proposed method for the purpose of performance evaluation in the real- time wireless environment. Results demonstrate that the proposed method enhances the performance of the OAI system and shows its potential for the fifth generation (5G) technology.","PeriodicalId":6484,"journal":{"name":"2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)","volume":"27 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90762564","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 : 2016-09-01DOI: 10.1109/VTCFall.2016.7881201
Lina Yang, Qiang Wang, Wei Wei, Jianou Huang
We consider the muti-user muti-content downloading service with the help of idle users working as contents servers in device-to-device (D2D) underlay network. Taking the contents distribution into account, we propose a hybrid transmitting strategy and investigate the performance enhancement it brings about. Then by formulating the helper finding and resource allocation as a minimum downloading time problem, we propose a low complexity scheme to determine: (1) the idle user which should serve as helper for each downloader through D2D underlay communication (2) the cellular user which shares the uplink resource with less interference. Numerical simulations show that the strategy of taking contents distribution into account can bring significant performance gain. And our proposed scheme is presented to have near optimal performance, especially works well when the contents reuse rate is high.
{"title":"Resource Scheduling for Content Downloading Network with D2D Support","authors":"Lina Yang, Qiang Wang, Wei Wei, Jianou Huang","doi":"10.1109/VTCFall.2016.7881201","DOIUrl":"https://doi.org/10.1109/VTCFall.2016.7881201","url":null,"abstract":"We consider the muti-user muti-content downloading service with the help of idle users working as contents servers in device-to-device (D2D) underlay network. Taking the contents distribution into account, we propose a hybrid transmitting strategy and investigate the performance enhancement it brings about. Then by formulating the helper finding and resource allocation as a minimum downloading time problem, we propose a low complexity scheme to determine: (1) the idle user which should serve as helper for each downloader through D2D underlay communication (2) the cellular user which shares the uplink resource with less interference. Numerical simulations show that the strategy of taking contents distribution into account can bring significant performance gain. And our proposed scheme is presented to have near optimal performance, especially works well when the contents reuse rate is high.","PeriodicalId":6484,"journal":{"name":"2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)","volume":"53 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89816014","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 : 2016-09-01DOI: 10.1109/VTCFall.2016.7880972
Shahd Mohamed Abdel Gawad, Amr H. El Mougy, Menna Ahmed El-Meligy
Road surface conditions can cause serious traffic accidents, often with tragic consequences. Thus, an efficient system for mapping road anomalies can significantly promote the safety of drivers and pedestrians. This paper proposes a novel road anomaly mapping system that is able to detect a wide variety of conditions with high accuracy. The smartphone's accelerometer and GPS sensors are used for detection to minimize infrastructure costs. In addition, to ensure the system is adaptive to different road conditions, pattern recognition techniques are used to automatically calculate the detection threshold. Furthermore, to compensate for GPS inaccuracies, reinforcement learning based on a proposed reward system is used to maximize confidence in the detected anomalies. The reward system is also able to forget anomalies that have been fixed. Moreover, the system is implemented in a distributed way between the smartphone and a cloud server to minimize cellular bandwidth usage, while still retaining the accuracy advantages of a centralized cloud. Live tests have been conducted to evaluate the performance of the system and the results show it is accurate under different driving conditions.
{"title":"Dynamic Mapping of Road Conditions Using Smartphone Sensors and Machine Learning Techniques","authors":"Shahd Mohamed Abdel Gawad, Amr H. El Mougy, Menna Ahmed El-Meligy","doi":"10.1109/VTCFall.2016.7880972","DOIUrl":"https://doi.org/10.1109/VTCFall.2016.7880972","url":null,"abstract":"Road surface conditions can cause serious traffic accidents, often with tragic consequences. Thus, an efficient system for mapping road anomalies can significantly promote the safety of drivers and pedestrians. This paper proposes a novel road anomaly mapping system that is able to detect a wide variety of conditions with high accuracy. The smartphone's accelerometer and GPS sensors are used for detection to minimize infrastructure costs. In addition, to ensure the system is adaptive to different road conditions, pattern recognition techniques are used to automatically calculate the detection threshold. Furthermore, to compensate for GPS inaccuracies, reinforcement learning based on a proposed reward system is used to maximize confidence in the detected anomalies. The reward system is also able to forget anomalies that have been fixed. Moreover, the system is implemented in a distributed way between the smartphone and a cloud server to minimize cellular bandwidth usage, while still retaining the accuracy advantages of a centralized cloud. Live tests have been conducted to evaluate the performance of the system and the results show it is accurate under different driving conditions.","PeriodicalId":6484,"journal":{"name":"2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)","volume":"37 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86850085","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 : 2016-09-01DOI: 10.1109/VTCFall.2016.7881165
B. Turan, Omer Narmanlioglu, S. Ergen, M. Uysal
Visible light communication (VLC) has recently gained popularity as a complementary technology to radio frequency (RF) based alternatives for vehicular communications as a low-cost, secure and RF interference free technology. In this paper, we propose IEEE 802.15.7 standard-compliant physical layer (PHY) implementation and experimental evaluation, using commercial off-the-shelf (COTS) automotive light emitting diode (LED) fog light for the purpose of low-latency safety message dissemination. We first show that the standard is applicable to line of sight (LoS) vehicle-to-vehicle (V2V) VLC. We then demonstrate that the proper selection of modulation coding schemes (MCS) plays an important role in order to minimize bit-error- rate (BER) for the reliable transmission with varying inter-vehicle distances. We also addressed the angular limitations of COTS automotive LED light for viable vehicular VLC.
{"title":"Physical Layer Implementation of Standard Compliant Vehicular VLC","authors":"B. Turan, Omer Narmanlioglu, S. Ergen, M. Uysal","doi":"10.1109/VTCFall.2016.7881165","DOIUrl":"https://doi.org/10.1109/VTCFall.2016.7881165","url":null,"abstract":"Visible light communication (VLC) has recently gained popularity as a complementary technology to radio frequency (RF) based alternatives for vehicular communications as a low-cost, secure and RF interference free technology. In this paper, we propose IEEE 802.15.7 standard-compliant physical layer (PHY) implementation and experimental evaluation, using commercial off-the-shelf (COTS) automotive light emitting diode (LED) fog light for the purpose of low-latency safety message dissemination. We first show that the standard is applicable to line of sight (LoS) vehicle-to-vehicle (V2V) VLC. We then demonstrate that the proper selection of modulation coding schemes (MCS) plays an important role in order to minimize bit-error- rate (BER) for the reliable transmission with varying inter-vehicle distances. We also addressed the angular limitations of COTS automotive LED light for viable vehicular VLC.","PeriodicalId":6484,"journal":{"name":"2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)","volume":"217 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86851257","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 : 2016-09-01DOI: 10.1109/VTCFall.2016.7880916
Shen Zhang, Lu Zhou, Mingli Wu, Zhushou Tang, Na Ruan, Haojin Zhu
Abstract-Due to the worldwide deployment of Long Term Evolution (LTE), the fourth-generation (4G) mobile cellular networking technology, Voice over LTE (VoLTE) [2] has been also well developed in past few years. It exploits packet-switched network to provide call services instead of the traditional circuit- switched telephony. Similar to the Voice over IP (VoIP), VoLTE adopts Session Initiation Protocol (SIP) to achieve some control functions. Therefore, it means attack techniques against the SIP will also be effective against VoLTE devices. In this paper, we propose a novel device-side SIP-aware detecting system against two kinds of SIP attacks, SIP message flooding attack and malformed SIP message attack. To detect the message flooding attack, we set threshold for the traffic of SIP message received from VoLTE interface within one minute. And for the malformed message attack, we provide the structure and formalization rules of SIP messages to detect malformed SIP messages by utilizing ontology descriptions. This paper presents the design and implementation of this detecting system. The simulation test shows that this system will improve the security level of VoLTE service in real applications.
摘要:随着第四代(4G)移动蜂窝网络技术长期演进(LTE)在全球范围内的部署，语音LTE (VoLTE)[2]在过去几年中也得到了很好的发展。它利用分组交换网络代替传统的电路交换电话提供呼叫服务。VoLTE与VoIP (Voice over IP)类似，采用SIP (Session Initiation Protocol)协议来实现部分控制功能。因此，这意味着针对SIP的攻击技术也将对VoLTE设备有效。本文提出了一种针对SIP报文泛洪攻击和SIP报文畸形攻击的设备侧SIP感知检测系统。为了检测报文泛洪攻击，我们设置了一分钟内从VoLTE接口接收SIP报文流量的阈值。针对SIP畸形消息攻击，提出了SIP消息的结构和形式化规则，利用本体描述检测SIP畸形消息。本文介绍了该检测系统的设计与实现。仿真测试表明，该系统在实际应用中提高了VoLTE业务的安全水平。
{"title":"Automatic Detection of SIP-Aware Attacks on VoLTE Device","authors":"Shen Zhang, Lu Zhou, Mingli Wu, Zhushou Tang, Na Ruan, Haojin Zhu","doi":"10.1109/VTCFall.2016.7880916","DOIUrl":"https://doi.org/10.1109/VTCFall.2016.7880916","url":null,"abstract":"Abstract-Due to the worldwide deployment of Long Term Evolution (LTE), the fourth-generation (4G) mobile cellular networking technology, Voice over LTE (VoLTE) [2] has been also well developed in past few years. It exploits packet-switched network to provide call services instead of the traditional circuit- switched telephony. Similar to the Voice over IP (VoIP), VoLTE adopts Session Initiation Protocol (SIP) to achieve some control functions. Therefore, it means attack techniques against the SIP will also be effective against VoLTE devices. In this paper, we propose a novel device-side SIP-aware detecting system against two kinds of SIP attacks, SIP message flooding attack and malformed SIP message attack. To detect the message flooding attack, we set threshold for the traffic of SIP message received from VoLTE interface within one minute. And for the malformed message attack, we provide the structure and formalization rules of SIP messages to detect malformed SIP messages by utilizing ontology descriptions. This paper presents the design and implementation of this detecting system. The simulation test shows that this system will improve the security level of VoLTE service in real applications.","PeriodicalId":6484,"journal":{"name":"2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)","volume":"25 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78698695","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 : 2016-09-01DOI: 10.1109/VTCFall.2016.7881022
J. M. Romero-Jerez, F. J. López-Martínez
A channel capacity analysis is presented in this work for a spectrum-sharing cognitive radio link in which the fading experienced by the signal is modeled with the Hoyt (Nakagami-q) distribution. Based on a novel formulation of the squared Hoyt distribution derived by the authors, simple expressions for the capacity of the secondary link in a number of scenarios of interest are derived, which are given in terms of easy-to-compute finite-range integrals of elementary functions. The effect of fading severity in the secondary transmitter-primary receiver (ST-PR) and secondary transmitter-secondary receiver (ST-SR) links, and the impact of different antenna gains on the system performance are analyzed. We show that in the presence of severe fading for the ST-PR link, the capacity of the ST-SR link is increased.
{"title":"Fundamental Capacity Limits of Spectrum-Sharing in Hoyt (Nakagami-q) Fading Channels","authors":"J. M. Romero-Jerez, F. J. López-Martínez","doi":"10.1109/VTCFall.2016.7881022","DOIUrl":"https://doi.org/10.1109/VTCFall.2016.7881022","url":null,"abstract":"A channel capacity analysis is presented in this work for a spectrum-sharing cognitive radio link in which the fading experienced by the signal is modeled with the Hoyt (Nakagami-q) distribution. Based on a novel formulation of the squared Hoyt distribution derived by the authors, simple expressions for the capacity of the secondary link in a number of scenarios of interest are derived, which are given in terms of easy-to-compute finite-range integrals of elementary functions. The effect of fading severity in the secondary transmitter-primary receiver (ST-PR) and secondary transmitter-secondary receiver (ST-SR) links, and the impact of different antenna gains on the system performance are analyzed. We show that in the presence of severe fading for the ST-PR link, the capacity of the ST-SR link is increased.","PeriodicalId":6484,"journal":{"name":"2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)","volume":"29 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80123808","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 : 2016-09-01DOI: 10.1109/VTCFall.2016.7880911
Vahid Towhidlou, M. Shikh-Bahaei
We consider a cognitive radio network of nodes with full duplex capability where Self-Interference Suppression (SIS) is not perfect. We have proposed a new scheme for sensing and transmission of Secondary Users (SUs) with two modes of operation; Cooperative Sensing (CS) mode and Full Duplex Transmit and Receive (FDTR) mode. Cooperative sensing is applied to reduce misdetection probability and to avoid collision with primary users. Upon successful detection of a spectrum hole, both SUs start bidirectional communication in the FDTR mode in an asynchronous manner to decrease average collision duration while doubling throughput. Analytical closed forms for collision probability, average collision duration, and throughput of SUs are derived and impact of imperfect SIS and SUs' frame duration on network performance are investigated.
我们考虑了一个具有全双工能力的节点认知无线网络，其中自干扰抑制(SIS)并不完美。我们提出了一种具有两种操作模式的感应和传输辅助用户(SUs)的新方案;CS (Cooperative Sensing)模式和FDTR (Full Duplex Transmit and Receive)模式。采用协同感知，降低误检概率，避免与主用户发生碰撞。在成功检测到频谱空洞后，两个SUs以异步方式以FDTR模式启动双向通信，以减少平均碰撞持续时间，同时使吞吐量增加一倍。导出了单节点的碰撞概率、平均碰撞持续时间和吞吐量的解析封闭形式，并研究了不完全SIS和单节点帧持续时间对网络性能的影响。
{"title":"Asynchronous Full-Duplex Cognitive Radio","authors":"Vahid Towhidlou, M. Shikh-Bahaei","doi":"10.1109/VTCFall.2016.7880911","DOIUrl":"https://doi.org/10.1109/VTCFall.2016.7880911","url":null,"abstract":"We consider a cognitive radio network of nodes with full duplex capability where Self-Interference Suppression (SIS) is not perfect. We have proposed a new scheme for sensing and transmission of Secondary Users (SUs) with two modes of operation; Cooperative Sensing (CS) mode and Full Duplex Transmit and Receive (FDTR) mode. Cooperative sensing is applied to reduce misdetection probability and to avoid collision with primary users. Upon successful detection of a spectrum hole, both SUs start bidirectional communication in the FDTR mode in an asynchronous manner to decrease average collision duration while doubling throughput. Analytical closed forms for collision probability, average collision duration, and throughput of SUs are derived and impact of imperfect SIS and SUs' frame duration on network performance are investigated.","PeriodicalId":6484,"journal":{"name":"2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)","volume":"94 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83880248","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 : 2016-09-01DOI: 10.1109/VTCFall.2016.7881168
P. Ezran, Yoram Haddad, M. Debbah
Polarization diversity is generally achieved by using two orthogonal polarizations on the same link, which enables to double the available bandwidth. In this paper, we study the possibility to connect the nodes of a line-of- sight ring topology network with one single channel for all the links, with the condition that the polarization of any link is orthogonal to the polarization of the two adjacent links. The solution proposed in this paper can improve spectrum efficiency by up to 50% in comparison with the widespread polarization multiplexing solution.
{"title":"Polarization Diversity in Ring Topology Networks","authors":"P. Ezran, Yoram Haddad, M. Debbah","doi":"10.1109/VTCFall.2016.7881168","DOIUrl":"https://doi.org/10.1109/VTCFall.2016.7881168","url":null,"abstract":"Polarization diversity is generally achieved by using two orthogonal polarizations on the same link, which enables to double the available bandwidth. In this paper, we study the possibility to connect the nodes of a line-of- sight ring topology network with one single channel for all the links, with the condition that the polarization of any link is orthogonal to the polarization of the two adjacent links. The solution proposed in this paper can improve spectrum efficiency by up to 50% in comparison with the widespread polarization multiplexing solution.","PeriodicalId":6484,"journal":{"name":"2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)","volume":"51 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86126872","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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