Pub Date : 2017-11-01DOI: 10.1109/LATINCOM.2017.8240151
Liliana Cruz Flores, V. A. Reguera, Erik Ortiz Guerra, David R. Suarez Mora, Fabián Blanco Garrido, E. A. Lopez
The design of blind rendezvous strategies for dynamic spectrum access in multi-users, multi-hop networks is a challenging task. In this paper, a two radios synchronization strategy that minimizes the time to rendezvous in multi-users networks is analyze. In fact, it has been recently demonstrated that this synchronization strategy provides optimum results in terms of maximum time to rendezvous (MTTR). In this paper, the analysis to the expected time to rendezvous (ETTR) and derive analytical expressions for its numerical computation is extended. The estimated ETTR is compared with those obtained by simulation, using a representative blind rendezvous channel hopping sequence. The results indicate that the numerical expressions provide good estimates of the actual ETTR. Moreover, the ETTR achieved by the proposed synchronization strategy has proven to be bounded by the MTTR of a pair-wise rendezvous process irrespective of the number of users and the network topology. This property makes the analyzed rendezvous mechanism, and particularly the synchronization strategy, suitable for the deployment of large and dense networks.
{"title":"Expected time to rendezvous in multi-hop cognitive radio networks","authors":"Liliana Cruz Flores, V. A. Reguera, Erik Ortiz Guerra, David R. Suarez Mora, Fabián Blanco Garrido, E. A. Lopez","doi":"10.1109/LATINCOM.2017.8240151","DOIUrl":"https://doi.org/10.1109/LATINCOM.2017.8240151","url":null,"abstract":"The design of blind rendezvous strategies for dynamic spectrum access in multi-users, multi-hop networks is a challenging task. In this paper, a two radios synchronization strategy that minimizes the time to rendezvous in multi-users networks is analyze. In fact, it has been recently demonstrated that this synchronization strategy provides optimum results in terms of maximum time to rendezvous (MTTR). In this paper, the analysis to the expected time to rendezvous (ETTR) and derive analytical expressions for its numerical computation is extended. The estimated ETTR is compared with those obtained by simulation, using a representative blind rendezvous channel hopping sequence. The results indicate that the numerical expressions provide good estimates of the actual ETTR. Moreover, the ETTR achieved by the proposed synchronization strategy has proven to be bounded by the MTTR of a pair-wise rendezvous process irrespective of the number of users and the network topology. This property makes the analyzed rendezvous mechanism, and particularly the synchronization strategy, suitable for the deployment of large and dense networks.","PeriodicalId":190644,"journal":{"name":"2017 IEEE 9th Latin-American Conference on Communications (LATINCOM)","volume":"6 3‐4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113978162","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 : 2017-11-01DOI: 10.1109/LATINCOM.2017.8240159
C. Rodrigues, L. Muratori, LISANDRO LOVISOLO
A possible scenario for the evolution of Television Broadcast is the adoption of 8 K resolution video broadcasting. To achieve the required bit-rates MIMO technologies are an actual candidate. In this scenario, this paper collected electric field levels from a MIMO experimental system for TV broadcasting to tune the parameters of the ITU-R P.1546 propagation model, which has been employed to model VHF and UHF broadcast channels. The parameters are tuned for each polarization alone and for both together. This is done considering multiple reception points and also a larger capturing time interval for a fixed reception site. Significant improvements on the match between the actual and measured link budget are provided by the optimized parameters.
{"title":"Tuning the ITU-R P.1546 model in a MIMO scenario and urban environment","authors":"C. Rodrigues, L. Muratori, LISANDRO LOVISOLO","doi":"10.1109/LATINCOM.2017.8240159","DOIUrl":"https://doi.org/10.1109/LATINCOM.2017.8240159","url":null,"abstract":"A possible scenario for the evolution of Television Broadcast is the adoption of 8 K resolution video broadcasting. To achieve the required bit-rates MIMO technologies are an actual candidate. In this scenario, this paper collected electric field levels from a MIMO experimental system for TV broadcasting to tune the parameters of the ITU-R P.1546 propagation model, which has been employed to model VHF and UHF broadcast channels. The parameters are tuned for each polarization alone and for both together. This is done considering multiple reception points and also a larger capturing time interval for a fixed reception site. Significant improvements on the match between the actual and measured link budget are provided by the optimized parameters.","PeriodicalId":190644,"journal":{"name":"2017 IEEE 9th Latin-American Conference on Communications (LATINCOM)","volume":"428 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116537993","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 : 2017-11-01DOI: 10.1109/LATINCOM.2017.8240195
Jose Alonso, B. Ramos, I. Nolivos, Raul Mejia
This article presents the analysis of the influence of environmental variables on the received signal power from a point to point wireless link (f = 5.52 GHz) in a tropical urban environment, in the cities of Guayaquil and Duran, of Ecuador. The study included data of five variables such as relative humidity (HR), atmospheric temperature (T), solar radiation (RS), rainfall (Pr) and signal power (P) for three days of measurements, during the rainy season of 2016. A graphical and correlational analysis was performed for each climatic variable with the received signal power, and three regression models were developed. The first is linear, the second is quadratic, and finally, the third is non-linear based on a logistic function with four parameters using statistics packages of the software SPSS Statistics. From the data analysis, it can be concluded that the rainfall event modulated the influence of the atmospheric temperature on the power signal response, being temperature the variable that presents the higher correlation with the power signal data.
{"title":"Modelling the influence of climatic variables on the received power of a wireless link using an unlicensed U-NII band: A case study in Ecuador","authors":"Jose Alonso, B. Ramos, I. Nolivos, Raul Mejia","doi":"10.1109/LATINCOM.2017.8240195","DOIUrl":"https://doi.org/10.1109/LATINCOM.2017.8240195","url":null,"abstract":"This article presents the analysis of the influence of environmental variables on the received signal power from a point to point wireless link (f = 5.52 GHz) in a tropical urban environment, in the cities of Guayaquil and Duran, of Ecuador. The study included data of five variables such as relative humidity (HR), atmospheric temperature (T), solar radiation (RS), rainfall (Pr) and signal power (P) for three days of measurements, during the rainy season of 2016. A graphical and correlational analysis was performed for each climatic variable with the received signal power, and three regression models were developed. The first is linear, the second is quadratic, and finally, the third is non-linear based on a logistic function with four parameters using statistics packages of the software SPSS Statistics. From the data analysis, it can be concluded that the rainfall event modulated the influence of the atmospheric temperature on the power signal response, being temperature the variable that presents the higher correlation with the power signal data.","PeriodicalId":190644,"journal":{"name":"2017 IEEE 9th Latin-American Conference on Communications (LATINCOM)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122125243","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 : 2017-11-01DOI: 10.1109/LATINCOM.2017.8240179
Houda Hafi, Wahabou Abdou, S. Merniz
Bringing to the market intelligent vehicles is one of the current challenges faced by car manufacturers. These vehicles must be able to communicate in order to cooperate and be more effective. The issue of inter-vehicle communications is an active research topic. This paper proposes a reliable geographical broadcasting protocol which has a twofold goal: limiting the risk of interference and reducing the dissemination time. To achieve theses goals, two mechanisms are proposed. The first one divides the road (more precisely, each vehicle's coverage area) into several segments depending on the local density. Thereafter, the priority to relay a message is given to nodes that are in the farthest segment from the source node. The second mechanism allows to reduce the waiting time thanks to a periodic update process. This paper also analysis the performance of geographical broadcasting protocols in case of multiple simultaneous communications. The goal is to observe how these protocols behave when the radio channel becomes overloaded. The comparison study (in terms of packet loss and dissemination time) shows that the proposed protocol outperforms two other VANETs' broadcasting protocols.
{"title":"Impact of concurrent communications in geographical broadcasting protocols for vehicular ad hoc networks","authors":"Houda Hafi, Wahabou Abdou, S. Merniz","doi":"10.1109/LATINCOM.2017.8240179","DOIUrl":"https://doi.org/10.1109/LATINCOM.2017.8240179","url":null,"abstract":"Bringing to the market intelligent vehicles is one of the current challenges faced by car manufacturers. These vehicles must be able to communicate in order to cooperate and be more effective. The issue of inter-vehicle communications is an active research topic. This paper proposes a reliable geographical broadcasting protocol which has a twofold goal: limiting the risk of interference and reducing the dissemination time. To achieve theses goals, two mechanisms are proposed. The first one divides the road (more precisely, each vehicle's coverage area) into several segments depending on the local density. Thereafter, the priority to relay a message is given to nodes that are in the farthest segment from the source node. The second mechanism allows to reduce the waiting time thanks to a periodic update process. This paper also analysis the performance of geographical broadcasting protocols in case of multiple simultaneous communications. The goal is to observe how these protocols behave when the radio channel becomes overloaded. The comparison study (in terms of packet loss and dissemination time) shows that the proposed protocol outperforms two other VANETs' broadcasting protocols.","PeriodicalId":190644,"journal":{"name":"2017 IEEE 9th Latin-American Conference on Communications (LATINCOM)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130952376","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 : 2017-11-01DOI: 10.1109/LATINCOM.2017.8240169
M. Rice, E. Perrins
The frequency-domain equalization techniques described by Tan & Stüber, Pancaldi & Vitetta, Van Thillo et al, and Williams & Saquib are applied to SOQPSK-TG and its PAM approximation using two principal pulses. A simple representative channel from aeronautical telemetry was used in computer simulations. For weak multipath (measured by a shallow spectral null) the equalizers displayed nearly equal bit error rate performance. As the multipath intensity increased (deeper spectral null) the Pancaldi & Vitetta and Van Thillo equalizers achieved consistently superior performance, but operate at a loss of 8 dB at a bit error rate of 10−5.
Tan & st ber, Pancaldi & vittta, Van Thillo等人以及Williams & Saquib描述的频域均衡技术应用于SOQPSK-TG及其PAM近似，使用两个主脉冲。在计算机模拟中采用了航空遥测的一个简单的代表性信道。对于弱多径(由浅谱零值测量)，均衡器显示出几乎相等的误码率性能。随着多径强度的增加(更深的频谱零值)，Pancaldi & Vitetta和Van Thillo均衡器获得了持续的优越性能，但在误码率为10−5的情况下，工作损失为8 dB。
{"title":"A comparison of frequency-domain equalization techniques in aeronautical telemetry","authors":"M. Rice, E. Perrins","doi":"10.1109/LATINCOM.2017.8240169","DOIUrl":"https://doi.org/10.1109/LATINCOM.2017.8240169","url":null,"abstract":"The frequency-domain equalization techniques described by Tan & Stüber, Pancaldi & Vitetta, Van Thillo et al, and Williams & Saquib are applied to SOQPSK-TG and its PAM approximation using two principal pulses. A simple representative channel from aeronautical telemetry was used in computer simulations. For weak multipath (measured by a shallow spectral null) the equalizers displayed nearly equal bit error rate performance. As the multipath intensity increased (deeper spectral null) the Pancaldi & Vitetta and Van Thillo equalizers achieved consistently superior performance, but operate at a loss of 8 dB at a bit error rate of 10−5.","PeriodicalId":190644,"journal":{"name":"2017 IEEE 9th Latin-American Conference on Communications (LATINCOM)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132002948","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 : 2017-11-01DOI: 10.1109/LATINCOM.2017.8240172
Adrián Lara, Luis Quesada
In this paper we propose an SDN-based control plane for the University of Costa Rica. Our campus network faces heavy congestion problems and fails at providing adequate quality of service (QoS). Therefore, we describe a solution that leverages priority-traffic routing to ensure that important services (such as live video streaming) are not as heavily affected by congestion. To this end, we first survey how SDN has been used in campus networks. Next, we model and solve a linear programming problem to find the optimal solution to our priority-based routing problem. After that, we propose two alternative network designs that could be used to implement QoS in our campus network. We then propose a priority-based routing algorithm and compare the performance of the prototype against the optimal results by emulating the campus network on Mininet. We show how our design is capable of QoS for high-priority traffic in realistic conditions. Likewise, we also show the advantages of having a fully-SDN network capable of per-flow traffic throttling to maximize link usage.
{"title":"Priority-based routing in a campus network using SDN","authors":"Adrián Lara, Luis Quesada","doi":"10.1109/LATINCOM.2017.8240172","DOIUrl":"https://doi.org/10.1109/LATINCOM.2017.8240172","url":null,"abstract":"In this paper we propose an SDN-based control plane for the University of Costa Rica. Our campus network faces heavy congestion problems and fails at providing adequate quality of service (QoS). Therefore, we describe a solution that leverages priority-traffic routing to ensure that important services (such as live video streaming) are not as heavily affected by congestion. To this end, we first survey how SDN has been used in campus networks. Next, we model and solve a linear programming problem to find the optimal solution to our priority-based routing problem. After that, we propose two alternative network designs that could be used to implement QoS in our campus network. We then propose a priority-based routing algorithm and compare the performance of the prototype against the optimal results by emulating the campus network on Mininet. We show how our design is capable of QoS for high-priority traffic in realistic conditions. Likewise, we also show the advantages of having a fully-SDN network capable of per-flow traffic throttling to maximize link usage.","PeriodicalId":190644,"journal":{"name":"2017 IEEE 9th Latin-American Conference on Communications (LATINCOM)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115998952","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 : 2017-11-01DOI: 10.1109/LATINCOM.2017.8240177
Juan P. Hoyos, R. Carrillo, Sebastian Pazos, Pablo E. Jojoa
Methods based on order statistics are often used in finance, quality control, data and signal processing, especially when signals of interest are immersed in impulsive noise. These allow to include rank information by increasing the dimension of the problem. In large dimension problems, we are usually required to know only the second order statistics. In this article we use a rank-one quadratic measurement model based on sketches to estimate the correlation matrix for ordered data. Furthermore, we exploit this matrix's structure to design a convex relaxation optimization problem to recover the matrix. This reconstruction takes a number of measurements proportional to the original size of the problem (without ordering). We provide simulations to show the reconstruction performance of the proposed scheme, and the robustness of this estimation when uniform noise is present.
{"title":"Correlation sketching for ordered data","authors":"Juan P. Hoyos, R. Carrillo, Sebastian Pazos, Pablo E. Jojoa","doi":"10.1109/LATINCOM.2017.8240177","DOIUrl":"https://doi.org/10.1109/LATINCOM.2017.8240177","url":null,"abstract":"Methods based on order statistics are often used in finance, quality control, data and signal processing, especially when signals of interest are immersed in impulsive noise. These allow to include rank information by increasing the dimension of the problem. In large dimension problems, we are usually required to know only the second order statistics. In this article we use a rank-one quadratic measurement model based on sketches to estimate the correlation matrix for ordered data. Furthermore, we exploit this matrix's structure to design a convex relaxation optimization problem to recover the matrix. This reconstruction takes a number of measurements proportional to the original size of the problem (without ordering). We provide simulations to show the reconstruction performance of the proposed scheme, and the robustness of this estimation when uniform noise is present.","PeriodicalId":190644,"journal":{"name":"2017 IEEE 9th Latin-American Conference on Communications (LATINCOM)","volume":"30 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114112961","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 : 2017-11-01DOI: 10.1109/LATINCOM.2017.8240164
J. Minango, C. D. Almeida
In massive multiple-input multiple-output (MIMO) systems, with the increase of the number of received antennas at base station (BS), the linear detectors, as minimum mean-square error (MMSE), are able to achieve the near-optimal performance. However, these detectors involve matrix inversion with high complexity. Thus, in order to reduce the complexity, Neumann Series (NS) expansion has been proposed to find an approximate inverse matrix, because of its suitability for massive MIMO systems and its advantages in hardware implementation. In this paper, the basic idea is to carry out an approximate matrix inversion using a small number of NS terms, which allows one to achieve near-optimal performance at low complexity for the MMSE detector, in particular, the scale factor needed in NS expansion is optimized for the first-order NS expansion for which the post-detection signal-to-interference plus noise ratio (SINR) is maximized. Our result reveals that the low-complexity MMSE detector based on the first-order NS expansion has bit error rate (BER) equivalent to the one that employs matrix inversion and outperforms earlier approaches reported in the literature.
{"title":"Low-complexity MMSE detector based on the first-order Neumann series expansion for massive MIMO systems","authors":"J. Minango, C. D. Almeida","doi":"10.1109/LATINCOM.2017.8240164","DOIUrl":"https://doi.org/10.1109/LATINCOM.2017.8240164","url":null,"abstract":"In massive multiple-input multiple-output (MIMO) systems, with the increase of the number of received antennas at base station (BS), the linear detectors, as minimum mean-square error (MMSE), are able to achieve the near-optimal performance. However, these detectors involve matrix inversion with high complexity. Thus, in order to reduce the complexity, Neumann Series (NS) expansion has been proposed to find an approximate inverse matrix, because of its suitability for massive MIMO systems and its advantages in hardware implementation. In this paper, the basic idea is to carry out an approximate matrix inversion using a small number of NS terms, which allows one to achieve near-optimal performance at low complexity for the MMSE detector, in particular, the scale factor needed in NS expansion is optimized for the first-order NS expansion for which the post-detection signal-to-interference plus noise ratio (SINR) is maximized. Our result reveals that the low-complexity MMSE detector based on the first-order NS expansion has bit error rate (BER) equivalent to the one that employs matrix inversion and outperforms earlier approaches reported in the literature.","PeriodicalId":190644,"journal":{"name":"2017 IEEE 9th Latin-American Conference on Communications (LATINCOM)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114281667","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 : 2017-11-01DOI: 10.1109/LATINCOM.2017.8240174
Andressa Vergutz, Rafael Hansen da Silva, J. Nacif, A. Vieira, M. N. Lima
The prediction of adverse events in patient health has attracted researchers' attention for many years. Sensors in or on the body allow the continuous monitoring of patient's vital signs and their accurate analysis, supporting the generation of medical alerts. Exploring adverse event prediction only makes sense if medical alerts can be promptly transmitted to a hospital emergency response team. However, promptly transmitting them through heterogeneous wireless networks is still a challenge because of wireless communication features, i.e., interferences and collisions, and the current medium access control (MAC) protocol design, that still produces competition between medical alerts, and video, voice and other types of data. Differently from current mechanisms that either are separately concerned to the prediction of adverse events or to give priority to different type of data transmission, this work presents SANTE, a System for Anticipated identificatioN and Transmission of mEdical alerts on wireless networks. Based on trends about the imminence of adverse events on patient health, the system generates medical alerts and promptly transmit them. It presents a novel proposal to medium access control for medical alerts, reducing contention window and Arbitration Inter-Frame Spacing (AIFS) time for them. Simulation results show a reduction of 39% in the average latency for alert transmissions and 8% in losses.
{"title":"Mapping critical illness early signs to priority alert transmission on wireless networks","authors":"Andressa Vergutz, Rafael Hansen da Silva, J. Nacif, A. Vieira, M. N. Lima","doi":"10.1109/LATINCOM.2017.8240174","DOIUrl":"https://doi.org/10.1109/LATINCOM.2017.8240174","url":null,"abstract":"The prediction of adverse events in patient health has attracted researchers' attention for many years. Sensors in or on the body allow the continuous monitoring of patient's vital signs and their accurate analysis, supporting the generation of medical alerts. Exploring adverse event prediction only makes sense if medical alerts can be promptly transmitted to a hospital emergency response team. However, promptly transmitting them through heterogeneous wireless networks is still a challenge because of wireless communication features, i.e., interferences and collisions, and the current medium access control (MAC) protocol design, that still produces competition between medical alerts, and video, voice and other types of data. Differently from current mechanisms that either are separately concerned to the prediction of adverse events or to give priority to different type of data transmission, this work presents SANTE, a System for Anticipated identificatioN and Transmission of mEdical alerts on wireless networks. Based on trends about the imminence of adverse events on patient health, the system generates medical alerts and promptly transmit them. It presents a novel proposal to medium access control for medical alerts, reducing contention window and Arbitration Inter-Frame Spacing (AIFS) time for them. Simulation results show a reduction of 39% in the average latency for alert transmissions and 8% in losses.","PeriodicalId":190644,"journal":{"name":"2017 IEEE 9th Latin-American Conference on Communications (LATINCOM)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125360962","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 : 2017-11-01DOI: 10.1109/LATINCOM.2017.8240185
Carolina Luiza Chamas, Daniel Cordeiro, M. Eler
There has been a high concern regarding the energy saving on mobile devices recently, for mobile devices have been performing increasingly complex tasks over time. The computation offloading is one of the most popular techniques used by developers as an effective way of saving energy on mobile devices, which consists on executing complex tasks in external servers with different purposes including save energy. Deciding towards offloading certain tasks requires to understand the influence of the amount of data, amount of computation, and the network profile. Several studies have investigated the influence of different wireless flavours, such as 3G, 4G and wifi, but no study has investigated the influence of the communication choices on the energy cost. Therefore, in this paper, we present an experiment we conducted to evaluate the energy consumption of different communication protocols and architectural styles, namely REST, SOAP, Socket and gRPC, when executing algorithms of different complexities and different input sizes and types. Results show that local execution is more economic with less complex algorithms and small input data. When it comes to remote execution, REST is the most economic choice followed by Socket. Moreover, our data show that computation offloading can save up to 10 time as much energy when compared to local execution for some executions configurations.
{"title":"Comparing REST, SOAP, Socket and gRPC in computation offloading of mobile applications: An energy cost analysis","authors":"Carolina Luiza Chamas, Daniel Cordeiro, M. Eler","doi":"10.1109/LATINCOM.2017.8240185","DOIUrl":"https://doi.org/10.1109/LATINCOM.2017.8240185","url":null,"abstract":"There has been a high concern regarding the energy saving on mobile devices recently, for mobile devices have been performing increasingly complex tasks over time. The computation offloading is one of the most popular techniques used by developers as an effective way of saving energy on mobile devices, which consists on executing complex tasks in external servers with different purposes including save energy. Deciding towards offloading certain tasks requires to understand the influence of the amount of data, amount of computation, and the network profile. Several studies have investigated the influence of different wireless flavours, such as 3G, 4G and wifi, but no study has investigated the influence of the communication choices on the energy cost. Therefore, in this paper, we present an experiment we conducted to evaluate the energy consumption of different communication protocols and architectural styles, namely REST, SOAP, Socket and gRPC, when executing algorithms of different complexities and different input sizes and types. Results show that local execution is more economic with less complex algorithms and small input data. When it comes to remote execution, REST is the most economic choice followed by Socket. Moreover, our data show that computation offloading can save up to 10 time as much energy when compared to local execution for some executions configurations.","PeriodicalId":190644,"journal":{"name":"2017 IEEE 9th Latin-American Conference on Communications (LATINCOM)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133947091","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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