In this demo we present the EmPOWER Mobile Network Operating System. EmPOWER supports both WiFi and LTE networks and can interface with state--the--art SDN controllers using an intent--based interface. A Python--based SDK allows network programmers to write and deploy advanced control tasks as Network Apps. The demo will illustrate three Network Apps: mobility management, multicast, and VNF chaining/migration. We will also stage a speed tutorial allowing attendees to write and test a simple Network App using the EmPOWER SDK.
{"title":"The EmPOWER mobile network operating system: demo","authors":"R. Riggio","doi":"10.1145/2980159.2980173","DOIUrl":"https://doi.org/10.1145/2980159.2980173","url":null,"abstract":"In this demo we present the EmPOWER Mobile Network Operating System. EmPOWER supports both WiFi and LTE networks and can interface with state--the--art SDN controllers using an intent--based interface. A Python--based SDK allows network programmers to write and deploy advanced control tasks as Network Apps. The demo will illustrate three Network Apps: mobility management, multicast, and VNF chaining/migration. We will also stage a speed tutorial allowing attendees to write and test a simple Network App using the EmPOWER SDK.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129463947","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}
Jason J. Quinlan, A. Reviakin, A. Khalid, K. Ramakrishnan, C. Sreenan
In this demonstration we extend our recent work - "D-LiTE: A platform for evaluating DASH performance over a simulated LTE network". With D-LiTE we stream actual DASH content between real physical clients and an Apache2 server, over a simulated NS3-LTE air interface in real-time. We enhance our platform to encompass both an Software Defined Network (SDN)-enabled backhaul and an SDN-enabled WIFI router attached to the backhaul. Similar to data offloading in most ISP networks, with D-LiTE-ful we demonstrate how distributing video flows to local WIFI networks improves achievable Quality of Experience (QoE) not only for the clients moving to the WIFI hotspot but also for the remaining clients on the LTE network. Based on feedback from both a "Panoramic UI" which provides a mechanism for LTE and Client parametrisation, and a means of viewing the output of their interactions, and an "SDN UI" which offers packet level information and illustrates routing behaviours in the backhaul, we observe real-time variation in both network conditions and improvement in client QoE. The demonstration showcases how an SDN-enabled multi-faceted ISP network can provide dynamic offloading between LTE and WIFI networks by offering a means of local caching, temporary re-routing of TCP flows and centralised control.
{"title":"D-LiTE-ful: an evaluation platform for DASH QoE for SDN-enabled ISP offloading in LTE: demo","authors":"Jason J. Quinlan, A. Reviakin, A. Khalid, K. Ramakrishnan, C. Sreenan","doi":"10.1145/2980159.2980175","DOIUrl":"https://doi.org/10.1145/2980159.2980175","url":null,"abstract":"In this demonstration we extend our recent work - \"D-LiTE: A platform for evaluating DASH performance over a simulated LTE network\". With D-LiTE we stream actual DASH content between real physical clients and an Apache2 server, over a simulated NS3-LTE air interface in real-time. We enhance our platform to encompass both an Software Defined Network (SDN)-enabled backhaul and an SDN-enabled WIFI router attached to the backhaul. Similar to data offloading in most ISP networks, with D-LiTE-ful we demonstrate how distributing video flows to local WIFI networks improves achievable Quality of Experience (QoE) not only for the clients moving to the WIFI hotspot but also for the remaining clients on the LTE network. Based on feedback from both a \"Panoramic UI\" which provides a mechanism for LTE and Client parametrisation, and a means of viewing the output of their interactions, and an \"SDN UI\" which offers packet level information and illustrates routing behaviours in the backhaul, we observe real-time variation in both network conditions and improvement in client QoE. The demonstration showcases how an SDN-enabled multi-faceted ISP network can provide dynamic offloading between LTE and WIFI networks by offering a means of local caching, temporary re-routing of TCP flows and centralised control.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129252394","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}
We present a thorough and extensive experimental performance characterization of the achievable data throughput, jitter, and fairness of the IEEE 802.11ac standard for indoor Wireless Local Area Networks (WLANs) using real testbed deployments and statistical analysis. 802.11ac achieves higher throughput by incorporating wider channels, more spatial streams, and denser modulation compared to the 802.11n standard. Through diverse testbed experiments we use multiple linear regression to gain insights on the influence of individual 802.11ac features and of their combinations on network performance and fairness for various link and interference scenarios. We further show that 802.11ac WLANs with wider channels can be fairer compared to 802.11a/n in dense environments with high interference.
{"title":"Evaluating 802.11ac features in indoor WLAN: an empirical study of performance and fairness","authors":"Lito Kriara, Edgar Costa Molero, T. Gross","doi":"10.1145/2980159.2980167","DOIUrl":"https://doi.org/10.1145/2980159.2980167","url":null,"abstract":"We present a thorough and extensive experimental performance characterization of the achievable data throughput, jitter, and fairness of the IEEE 802.11ac standard for indoor Wireless Local Area Networks (WLANs) using real testbed deployments and statistical analysis. 802.11ac achieves higher throughput by incorporating wider channels, more spatial streams, and denser modulation compared to the 802.11n standard. Through diverse testbed experiments we use multiple linear regression to gain insights on the influence of individual 802.11ac features and of their combinations on network performance and fairness for various link and interference scenarios. We further show that 802.11ac WLANs with wider channels can be fairer compared to 802.11a/n in dense environments with high interference.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"419 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133571509","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}
I. Tinnirello, D. Garlisi, Fabrizio Giuliano, V. Syrotiuk, G. Bianchi
Cognition as a way to deal with the challenges of future wireless networks has been largely considered by the recent literature, with a main focus on physical layer adaptability and dynamic spectrum access. In this demo, we show how a simple cognition mechanism can be also applied at the MAC layer, by exploiting the emerging paradigm of programmable wireless cards. The idea is using the formal definition of simple MAC protocol components and platform-independent representation of channel events gathered from the wireless node, for emulating the behavior of protocols which are not currently running on the network, learning about their expected performance, and dynamically reconfiguring the wireless node. We demonstrate that programmable nodes, employing our cognition scheme, can find in a distributed way a con-conflicting schedule with other neighbor nodes and can switch from contention-based to scheduled-based protocols as a function of the network load.
{"title":"MAC learning: enabling automatic combination of elementary protocol components: demo","authors":"I. Tinnirello, D. Garlisi, Fabrizio Giuliano, V. Syrotiuk, G. Bianchi","doi":"10.1145/2980159.2980174","DOIUrl":"https://doi.org/10.1145/2980159.2980174","url":null,"abstract":"Cognition as a way to deal with the challenges of future wireless networks has been largely considered by the recent literature, with a main focus on physical layer adaptability and dynamic spectrum access. In this demo, we show how a simple cognition mechanism can be also applied at the MAC layer, by exploiting the emerging paradigm of programmable wireless cards. The idea is using the formal definition of simple MAC protocol components and platform-independent representation of channel events gathered from the wireless node, for emulating the behavior of protocols which are not currently running on the network, learning about their expected performance, and dynamically reconfiguring the wireless node. We demonstrate that programmable nodes, employing our cognition scheme, can find in a distributed way a con-conflicting schedule with other neighbor nodes and can switch from contention-based to scheduled-based protocols as a function of the network load.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134249825","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}
Özgü Alay, Andra Lutu, Rafael García, Miguel Peón Quirós, V. Mancuso, T. Hirsch, Tobias Dely, J. Werme, Kristian Evensen, A. Hansen, Stefan Alfredsson, J. Karlsson, A. Brunström, Ali Safari Khatouni, M. Mellia, M. Marsan, R. Monno, H. Lønsethagen
This demo presents the MONROE distributed platform and how it can be used to implement measurement and assessment experiments with operational mobile broadband networks (MBBs). MONROE provides registered experimenters with open access to hundreds of nodes, distributed over several European countries and equipped with multiple MBB connections, and a backend system that collects the measurement results. Experiments are scheduled through a user-friendly web client, with no need to directly access the nodes. The platform further embeds tools for real-time traffic flow analysis and a powerful visualization tool.
{"title":"MONROE, a distributed platform to measure and assess mobile broadband networks: demo","authors":"Özgü Alay, Andra Lutu, Rafael García, Miguel Peón Quirós, V. Mancuso, T. Hirsch, Tobias Dely, J. Werme, Kristian Evensen, A. Hansen, Stefan Alfredsson, J. Karlsson, A. Brunström, Ali Safari Khatouni, M. Mellia, M. Marsan, R. Monno, H. Lønsethagen","doi":"10.1145/2980159.2980172","DOIUrl":"https://doi.org/10.1145/2980159.2980172","url":null,"abstract":"This demo presents the MONROE distributed platform and how it can be used to implement measurement and assessment experiments with operational mobile broadband networks (MBBs). MONROE provides registered experimenters with open access to hundreds of nodes, distributed over several European countries and equipped with multiple MBB connections, and a backend system that collects the measurement results. Experiments are scheduled through a user-friendly web client, with no need to directly access the nodes. The platform further embeds tools for real-time traffic flow analysis and a powerful visualization tool.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127679888","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}
Wireless signals and networks are ubiquitous. Though more reliable than ever, wireless networks still struggle with weak coverage, blind spots, and interference. Having a strong understanding of wireless signal propagation is essential for increasing coverage, optimizing performance, and minimizing interference for wireless networks. Extensive studies have analyzed the propagation of wireless signals and proposed theoretical models to simulate wireless signal propagation. Unfortunately, models of signal propagation are often not accurate in reality. Real-world signal measurements are required for validation. Existing methods for collecting wireless measurements either involve researchers walking to each location of interest and manually collecting measurements, or place sensors at each measurement location. As such, they require large amounts of time and effort and can be costly. We propose DroneSense, a system for measuring wireless signals in the 3D space using autonomous drones. Drone-Sense reduces the time and effort required for measurement collection, and is affordable and accessible to all users. It provides researchers with an efficient method to quickly analyze wireless coverage and test their wireless propagation models.
{"title":"Automating 3D wireless measurements with drones","authors":"Ethan Yu, Xi Xiong, Xia Zhou","doi":"10.1145/2980159.2980168","DOIUrl":"https://doi.org/10.1145/2980159.2980168","url":null,"abstract":"Wireless signals and networks are ubiquitous. Though more reliable than ever, wireless networks still struggle with weak coverage, blind spots, and interference. Having a strong understanding of wireless signal propagation is essential for increasing coverage, optimizing performance, and minimizing interference for wireless networks. Extensive studies have analyzed the propagation of wireless signals and proposed theoretical models to simulate wireless signal propagation. Unfortunately, models of signal propagation are often not accurate in reality. Real-world signal measurements are required for validation. Existing methods for collecting wireless measurements either involve researchers walking to each location of interest and manually collecting measurements, or place sensors at each measurement location. As such, they require large amounts of time and effort and can be costly. We propose DroneSense, a system for measuring wireless signals in the 3D space using autonomous drones. Drone-Sense reduces the time and effort required for measurement collection, and is affordable and accessible to all users. It provides researchers with an efficient method to quickly analyze wireless coverage and test their wireless propagation models.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127778672","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}
D. Nguyen, Anton Paatelma, H. Saarnisaari, Nagarajan Kandasamy, K. Dandekar
Widespread deployment of indoor wireless LANs has brought about many advantages, but at the same time posed tremendous challenges for interference management and service scalability. One means to improve wireless capacity in dense deployments is through simultaneous directional transmissions and receptions, but there has yet to be a coordinated approach that can adapt well to fast-changing channel conditions. In this demonstration we present a distributed directional antenna system to enhance spatial reuse in indoor scenarios. Our system is a holistic approach combining smart antennas, synchronous channel access, and an adaptive antenna beamsteering mechanism. We implement this system on software-defined radios and demonstrate the feasibility of dense spatial packing to maximize the network sum rate.
{"title":"Enhancing indoor spatial reuse through adaptive antenna beamsteering: demo","authors":"D. Nguyen, Anton Paatelma, H. Saarnisaari, Nagarajan Kandasamy, K. Dandekar","doi":"10.1145/2980159.2980170","DOIUrl":"https://doi.org/10.1145/2980159.2980170","url":null,"abstract":"Widespread deployment of indoor wireless LANs has brought about many advantages, but at the same time posed tremendous challenges for interference management and service scalability. One means to improve wireless capacity in dense deployments is through simultaneous directional transmissions and receptions, but there has yet to be a coordinated approach that can adapt well to fast-changing channel conditions. In this demonstration we present a distributed directional antenna system to enhance spatial reuse in indoor scenarios. Our system is a holistic approach combining smart antennas, synchronous channel access, and an adaptive antenna beamsteering mechanism. We implement this system on software-defined radios and demonstrate the feasibility of dense spatial packing to maximize the network sum rate.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132709894","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}
We demonstrate RadMAC, a radar-enhanced MAC protocol for agile mm-wave beamsteering supporting seamless high speed wireless connectivity. RadMAC uses radar to track moving obstacles and avoid primary mm-wave link disruption by preemptively beam-switching to/from the best unblocked secondary mm-wave link. Our RadMAC proof-of-concept implementation is based on an open-source software defined mm-wave transceiver operating at 60 GHz combined with a mm-wave single-chip radar platform. In the demonstration, we set up a link blockage experiment where a human walks through the LOS link between the AP and client node. We will show re-steering to/from a secondary NLOS link as the obstacle approaches and passes through the link. Real-time obstacle tracking radar data will be displayed, based on which RadMAC makes its beam-switching decisions. Real-time RSS measurements of the mm-wave link quality will also be displayed, to illustrate the benefit of RadMAC for maintaining a stable high-speed data rate in obstacle-rich indoor network environments.
{"title":"Radar-enhanced mm-wave agile beamsteering: demo","authors":"J. Arnold, L. Simić, M. Petrova, P. Mähönen","doi":"10.1145/2980159.2980171","DOIUrl":"https://doi.org/10.1145/2980159.2980171","url":null,"abstract":"We demonstrate RadMAC, a radar-enhanced MAC protocol for agile mm-wave beamsteering supporting seamless high speed wireless connectivity. RadMAC uses radar to track moving obstacles and avoid primary mm-wave link disruption by preemptively beam-switching to/from the best unblocked secondary mm-wave link. Our RadMAC proof-of-concept implementation is based on an open-source software defined mm-wave transceiver operating at 60 GHz combined with a mm-wave single-chip radar platform. In the demonstration, we set up a link blockage experiment where a human walks through the LOS link between the AP and client node. We will show re-steering to/from a secondary NLOS link as the obstacle approaches and passes through the link. Real-time obstacle tracking radar data will be displayed, based on which RadMAC makes its beam-switching decisions. Real-time RSS measurements of the mm-wave link quality will also be displayed, to illustrate the benefit of RadMAC for maintaining a stable high-speed data rate in obstacle-rich indoor network environments.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115367063","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}
In this poster, we present the hardware and software architecture of the University at Buffalo's Airborne Networking and Communications Testbed (UB-ANC). UB-ANC is an open software/hardware platform that aims to facilitate rapid testing and repeatable comparative evaluation of airborne networking and communications protocols at different layers of the protocol stack. It combines quadcopters capable of autonomous flight with sophisticated command and control capabilities and interchangeable wireless networking capabilities (e.g., Wi-Fi, Zigbee, LTE, or even software-defined radio). UB-ANC is designed with emphasis on modularity and extensibility, and is built around popular open-source projects and standards developed by the research and hobby communities.
{"title":"UB-ANC: a flexible airborne networking and communications testbed: poster","authors":"J. Modares, Nicholas Mastronarde","doi":"10.1145/2980159.2980176","DOIUrl":"https://doi.org/10.1145/2980159.2980176","url":null,"abstract":"In this poster, we present the hardware and software architecture of the University at Buffalo's Airborne Networking and Communications Testbed (UB-ANC). UB-ANC is an open software/hardware platform that aims to facilitate rapid testing and repeatable comparative evaluation of airborne networking and communications protocols at different layers of the protocol stack. It combines quadcopters capable of autonomous flight with sophisticated command and control capabilities and interchangeable wireless networking capabilities (e.g., Wi-Fi, Zigbee, LTE, or even software-defined radio). UB-ANC is designed with emphasis on modularity and extensibility, and is built around popular open-source projects and standards developed by the research and hobby communities.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"19 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132372523","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}
D. Nguyen, Anton Paatelma, H. Saarnisaari, Nagarajan Kandasamy, K. Dandekar
Ubiquitous wireless small-cell deployment requires a fundamental rethink of interference management within the cell, between cells, and with overlaying macrocells. One mean to increase spectral efficiency in these scenarios is through simultaneous directional transmissions and receptions, wherein the antenna directions can be selected such that the overall interference is minimized, or some other cost function is satisfied. To realistically evaluate the performance of these beamsteering techniques, network simulators or testbeds are often required. Nevertheless, a capable testbed that covers sufficient small-cell operational aspects and incorporates directional antennas has yet to be found in the literature. In this paper we present WARP-TDMAC, a software-defined radio framework to enable the prototyping of directionality-based spectrum sharing schemes for small cells. WARP-TDMAC integrates compact pattern-reconfigurable antennas with a high performance 802.11 physical layer and uses a time division multiple access (TDMA) based medium access control (MAC) scheme for antenna direction scheduling. We characterize the synchronization and temporal/spatial scheduling capabilities of this testbed through several example MAC schemes that would have been difficult to realize without our cross-layer framework. The empirical results show that appropriate use of directionality can result in higher network sum rates in dense small-cell deployments, but further investigation is required to find an effective solution for this highly complex operational environment.
{"title":"Enabling synchronous directional channel access on SDRs for spectrum sharing applications","authors":"D. Nguyen, Anton Paatelma, H. Saarnisaari, Nagarajan Kandasamy, K. Dandekar","doi":"10.1145/2980159.2980166","DOIUrl":"https://doi.org/10.1145/2980159.2980166","url":null,"abstract":"Ubiquitous wireless small-cell deployment requires a fundamental rethink of interference management within the cell, between cells, and with overlaying macrocells. One mean to increase spectral efficiency in these scenarios is through simultaneous directional transmissions and receptions, wherein the antenna directions can be selected such that the overall interference is minimized, or some other cost function is satisfied. To realistically evaluate the performance of these beamsteering techniques, network simulators or testbeds are often required. Nevertheless, a capable testbed that covers sufficient small-cell operational aspects and incorporates directional antennas has yet to be found in the literature. In this paper we present WARP-TDMAC, a software-defined radio framework to enable the prototyping of directionality-based spectrum sharing schemes for small cells. WARP-TDMAC integrates compact pattern-reconfigurable antennas with a high performance 802.11 physical layer and uses a time division multiple access (TDMA) based medium access control (MAC) scheme for antenna direction scheduling. We characterize the synchronization and temporal/spatial scheduling capabilities of this testbed through several example MAC schemes that would have been difficult to realize without our cross-layer framework. The empirical results show that appropriate use of directionality can result in higher network sum rates in dense small-cell deployments, but further investigation is required to find an effective solution for this highly complex operational environment.","PeriodicalId":433212,"journal":{"name":"Proceedings of the Tenth ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation, and Characterization","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132539820","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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