Pub Date : 2016-08-17DOI: 10.1109/FGCT.2016.7605063
Ahmed Albugmi, R. Walters, G. Wills
This study aims to identify key factors that organizations should consider when deciding whether to adopt cloud computing, and sets out a framework for how these factors can be weighed in order to make a decision. The study uses the Saudi Government agencies as a case study and makes several specific recommendations that pertain to the Saudi authorities' implementation of cloud computing. Although there are many benefits associated with deployment of cloud computing applications, there are also several challenges, such as compliance, legal issues, hosting issues, security, trust and privacy. There are also inadequate resources and guidelines for the policy makers and managers to inform their decision of whether or not to adopt cloud computing. This study identifies a number of factors; technological, environmental, organizational and societal, which need to be considered when an organization decides whether or not to adopt cloud computing. After identifying these factors, the study develops a comprehensive framework for organizations to assess their readiness for cloud computing. In addition, the feasibility of cloud computing applications is assessed so that different delivery and deployment models can be taken into account, and cloud computing evaluated from both business and customer perspectives.
{"title":"A framework for cloud computing adoption by Saudi government overseas agencies","authors":"Ahmed Albugmi, R. Walters, G. Wills","doi":"10.1109/FGCT.2016.7605063","DOIUrl":"https://doi.org/10.1109/FGCT.2016.7605063","url":null,"abstract":"This study aims to identify key factors that organizations should consider when deciding whether to adopt cloud computing, and sets out a framework for how these factors can be weighed in order to make a decision. The study uses the Saudi Government agencies as a case study and makes several specific recommendations that pertain to the Saudi authorities' implementation of cloud computing. Although there are many benefits associated with deployment of cloud computing applications, there are also several challenges, such as compliance, legal issues, hosting issues, security, trust and privacy. There are also inadequate resources and guidelines for the policy makers and managers to inform their decision of whether or not to adopt cloud computing. This study identifies a number of factors; technological, environmental, organizational and societal, which need to be considered when an organization decides whether or not to adopt cloud computing. After identifying these factors, the study develops a comprehensive framework for organizations to assess their readiness for cloud computing. In addition, the feasibility of cloud computing applications is assessed so that different delivery and deployment models can be taken into account, and cloud computing evaluated from both business and customer perspectives.","PeriodicalId":378077,"journal":{"name":"2016 Fifth International Conference on Future Generation Communication Technologies (FGCT)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129056421","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 : 2016-08-01DOI: 10.1109/FGCT.2016.7605071
A. A. Mahmud, P. Sant, Faisal Tariq, D. Jazani
The smart grid promises a myriad of benefits for both the consumer and energy service providers. However, realising its potential is subject to solving a number of complex issues. One of the major directions of smart grid research is demand response modelling that aimed at reducing the peak demand and billing by introducing appropriate real time pricing. The main difficulty is in managing the optimum pricing on a real time basis. In this paper, we will provide a state of the art review of an existing approach that models demand response in real time and also the underlying model that is tested with real data by using a stochastic iterative process with simultaneous perturbation stochastic approximation algorithm. Our model shows that real time price is better than a flat rate price. We will provide a brief outlook to the future where we propose a model that takes complex customers' behaviour into consideration. The proposed model includes a real time Price Suggestion Unit (PSU) that assists users to further reduce their electricity price while reducing the aggregate load for the energy providers.
{"title":"Empirical analysis of real time pricing mechanisms for demand side management: contemporary review","authors":"A. A. Mahmud, P. Sant, Faisal Tariq, D. Jazani","doi":"10.1109/FGCT.2016.7605071","DOIUrl":"https://doi.org/10.1109/FGCT.2016.7605071","url":null,"abstract":"The smart grid promises a myriad of benefits for both the consumer and energy service providers. However, realising its potential is subject to solving a number of complex issues. One of the major directions of smart grid research is demand response modelling that aimed at reducing the peak demand and billing by introducing appropriate real time pricing. The main difficulty is in managing the optimum pricing on a real time basis. In this paper, we will provide a state of the art review of an existing approach that models demand response in real time and also the underlying model that is tested with real data by using a stochastic iterative process with simultaneous perturbation stochastic approximation algorithm. Our model shows that real time price is better than a flat rate price. We will provide a brief outlook to the future where we propose a model that takes complex customers' behaviour into consideration. The proposed model includes a real time Price Suggestion Unit (PSU) that assists users to further reduce their electricity price while reducing the aggregate load for the energy providers.","PeriodicalId":378077,"journal":{"name":"2016 Fifth International Conference on Future Generation Communication Technologies (FGCT)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127192021","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 : 2016-08-01DOI: 10.1109/FGCT.2016.7605064
Hyeong-Kyu Lee, Yunmin Kim, Tae-Jin Lee
IEEE 802.11 Wireless Local Area Network (WLAN) supports multiple transmission rates according to the channel condition. In multi-rate IEEE 802.11 WLAN, the performance of stations with high rates may decline due to the relatively long channel occupation time of the stations with low rates. In order to mitigate this performance anomaly problem, we propose a new Medium Access Control (MAC) protocol. In the protocol, after the Access Point (AP) identifies the IDs of the near stations around the AP, it allocates time slots to the stations in the vicinity of the AP. Then they transmit data packets at the allocated time slots in a non-contention manner using the physical scheme of Wi-Fi. Through the simulation results, we show that the throughput of the proposed MAC protocol is superior to that of the traditional IEEE 802.11g by guaranteeing transmission opportunities of the stations near the AP.
{"title":"Wi-fi boost protocol in a heterogeneous network with Wi-Fi and RFID","authors":"Hyeong-Kyu Lee, Yunmin Kim, Tae-Jin Lee","doi":"10.1109/FGCT.2016.7605064","DOIUrl":"https://doi.org/10.1109/FGCT.2016.7605064","url":null,"abstract":"IEEE 802.11 Wireless Local Area Network (WLAN) supports multiple transmission rates according to the channel condition. In multi-rate IEEE 802.11 WLAN, the performance of stations with high rates may decline due to the relatively long channel occupation time of the stations with low rates. In order to mitigate this performance anomaly problem, we propose a new Medium Access Control (MAC) protocol. In the protocol, after the Access Point (AP) identifies the IDs of the near stations around the AP, it allocates time slots to the stations in the vicinity of the AP. Then they transmit data packets at the allocated time slots in a non-contention manner using the physical scheme of Wi-Fi. Through the simulation results, we show that the throughput of the proposed MAC protocol is superior to that of the traditional IEEE 802.11g by guaranteeing transmission opportunities of the stations near the AP.","PeriodicalId":378077,"journal":{"name":"2016 Fifth International Conference on Future Generation Communication Technologies (FGCT)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120956095","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 : 2016-08-01DOI: 10.1109/FGCT.2016.7605062
Ahmed Albugmi, M. Alassafi, R. Walters, G. Wills
This paper discusses the security of data in cloud computing. It is a study of data in the cloud and aspects related to it concerning security. The paper will go in to details of data protection methods and approaches used throughout the world to ensure maximum data protection by reducing risks and threats. Availability of data in the cloud is beneficial for many applications but it poses risks by exposing data to applications which might already have security loopholes in them. Similarly, use of virtualization for cloud computing might risk data when a guest OS is run over a hypervisor without knowing the reliability of the guest OS which might have a security loophole in it. The paper will also provide an insight on data security aspects for Data-in-Transit and Data-at-Rest. The study is based on all the levels of SaaS (Software as a Service), PaaS (Platform as a Service) and IaaS (Infrastructure as a Service).
{"title":"Data security in cloud computing","authors":"Ahmed Albugmi, M. Alassafi, R. Walters, G. Wills","doi":"10.1109/FGCT.2016.7605062","DOIUrl":"https://doi.org/10.1109/FGCT.2016.7605062","url":null,"abstract":"This paper discusses the security of data in cloud computing. It is a study of data in the cloud and aspects related to it concerning security. The paper will go in to details of data protection methods and approaches used throughout the world to ensure maximum data protection by reducing risks and threats. Availability of data in the cloud is beneficial for many applications but it poses risks by exposing data to applications which might already have security loopholes in them. Similarly, use of virtualization for cloud computing might risk data when a guest OS is run over a hypervisor without knowing the reliability of the guest OS which might have a security loophole in it. The paper will also provide an insight on data security aspects for Data-in-Transit and Data-at-Rest. The study is based on all the levels of SaaS (Software as a Service), PaaS (Platform as a Service) and IaaS (Infrastructure as a Service).","PeriodicalId":378077,"journal":{"name":"2016 Fifth International Conference on Future Generation Communication Technologies (FGCT)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132534920","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 : 2016-08-01DOI: 10.1109/FGCT.2016.7605072
A. E. Bouchti, Samir Bahsani, Tarik Nahhal
Data security continues to be one of the top concerns for cloud computing, an issue that's been intensified by recent high-profile attacks in healthcare. The encryption solution have to be quick and easy to provision and provides high levels of protec- tion without sacrificing network performance. It's another way to provide a critical layer of security to protect the customers. In this work, we are interested in data encryption in healthcare cloud. We propose a hybrid architecture based on Cryptography as a Service (CaaS) included the private cloud OpenStack platform. This architecture authorizes the cloud clients to be in control of their cryptographic operations and keys that they deploy in the cloud independently of the cloud provider. Firstly, we explore healthcare cloud environment and then we analyze some encryption algorithms. Secondly, we design and implement two cryptography algorithms (homomorphic encryption and RSA) in our proposed architecture for providing security to information based on OpenStack platform.
{"title":"Encryption as a service for data healthcare cloud security","authors":"A. E. Bouchti, Samir Bahsani, Tarik Nahhal","doi":"10.1109/FGCT.2016.7605072","DOIUrl":"https://doi.org/10.1109/FGCT.2016.7605072","url":null,"abstract":"Data security continues to be one of the top concerns for cloud computing, an issue that's been intensified by recent high-profile attacks in healthcare. The encryption solution have to be quick and easy to provision and provides high levels of protec- tion without sacrificing network performance. It's another way to provide a critical layer of security to protect the customers. In this work, we are interested in data encryption in healthcare cloud. We propose a hybrid architecture based on Cryptography as a Service (CaaS) included the private cloud OpenStack platform. This architecture authorizes the cloud clients to be in control of their cryptographic operations and keys that they deploy in the cloud independently of the cloud provider. Firstly, we explore healthcare cloud environment and then we analyze some encryption algorithms. Secondly, we design and implement two cryptography algorithms (homomorphic encryption and RSA) in our proposed architecture for providing security to information based on OpenStack platform.","PeriodicalId":378077,"journal":{"name":"2016 Fifth International Conference on Future Generation Communication Technologies (FGCT)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130981202","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 : 2016-08-01DOI: 10.1109/FGCT.2016.7605067
Yao-Liang Chung
Among researchers seeking to enhance the network coverage of macrocells, the utilization of small cell base stations (SBSs) is regarded as an approach with considerable promise. In the present study, we present a straightforward yet robust power-saving transmission scheme for use in macrocellsmall cell networks. The scheme presented herein both allows an SBS to be activated or deactivated in an efficient manner in response to the traffic load and closes any coverage holes (i.e., areas where users are unable to get a signal from the wireless network) by smartly enlarging neighboring small cells as needed when users attempt to use the network. At the same time, the scheme also allows pre-determined data rate requirements to be maintained. Data from simulations utilizing the proposed scheme indicate that it provides far greater energy savings than the conventional scheme.
{"title":"A simple power-saving transmission scheme for use in macrocell-small cell networks","authors":"Yao-Liang Chung","doi":"10.1109/FGCT.2016.7605067","DOIUrl":"https://doi.org/10.1109/FGCT.2016.7605067","url":null,"abstract":"Among researchers seeking to enhance the network coverage of macrocells, the utilization of small cell base stations (SBSs) is regarded as an approach with considerable promise. In the present study, we present a straightforward yet robust power-saving transmission scheme for use in macrocellsmall cell networks. The scheme presented herein both allows an SBS to be activated or deactivated in an efficient manner in response to the traffic load and closes any coverage holes (i.e., areas where users are unable to get a signal from the wireless network) by smartly enlarging neighboring small cells as needed when users attempt to use the network. At the same time, the scheme also allows pre-determined data rate requirements to be maintained. Data from simulations utilizing the proposed scheme indicate that it provides far greater energy savings than the conventional scheme.","PeriodicalId":378077,"journal":{"name":"2016 Fifth International Conference on Future Generation Communication Technologies (FGCT)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125291180","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 : 2016-08-01DOI: 10.1109/FGCT.2016.7605070
A. E. Bouchti, Tarik Nahhal
The security of SCADA (Supervisory Control and Data Acquisition) and realtime systems represents a significant challenge in today's world. The research in cyber-attack activities have gained immense emphasis. One of such research efforts is modeling of cyber-attacks. In this context, several modeling approaches have been developed, such as approaches based on attack trees (AT). In this paper, we propose Colored Petri Net (SGN) modeling approach by extending the attack trees with new modeling constructs and analysis approaches. SGN based attack model is flexible enough to model Internet intrusion, including the static and dynamic features of the intrusion. The process and rules of building SGN based attack model from AT are also presented. In order to evaluate the risk of intrusion, some cost elements are added to SGN based attack modeling. We show how attack trees can be converted and analyzed in SGN. Finally, we provide a case study that illustrates the SGN approach.
{"title":"Cyber security modeling for SCADA systems using stochastic game nets approach","authors":"A. E. Bouchti, Tarik Nahhal","doi":"10.1109/FGCT.2016.7605070","DOIUrl":"https://doi.org/10.1109/FGCT.2016.7605070","url":null,"abstract":"The security of SCADA (Supervisory Control and Data Acquisition) and realtime systems represents a significant challenge in today's world. The research in cyber-attack activities have gained immense emphasis. One of such research efforts is modeling of cyber-attacks. In this context, several modeling approaches have been developed, such as approaches based on attack trees (AT). In this paper, we propose Colored Petri Net (SGN) modeling approach by extending the attack trees with new modeling constructs and analysis approaches. SGN based attack model is flexible enough to model Internet intrusion, including the static and dynamic features of the intrusion. The process and rules of building SGN based attack model from AT are also presented. In order to evaluate the risk of intrusion, some cost elements are added to SGN based attack modeling. We show how attack trees can be converted and analyzed in SGN. Finally, we provide a case study that illustrates the SGN approach.","PeriodicalId":378077,"journal":{"name":"2016 Fifth International Conference on Future Generation Communication Technologies (FGCT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122051701","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 : 2016-08-01DOI: 10.1109/FGCT.2016.7605068
Y. Tusi, Hung-Yuan Chung
For mobile robots, being able to find a suitable route through an environment filled with varied obstacles, and to ensure that they can successfully reach their target point from the starting point in the most efficient manner is very important, and a necessary research topic. This article proposes a combination of Artificial Bee Colony Algorithm (ABC) and Rapidly-Exploring Random Tree (RRT) to produce a novel algorithm to meet these navigation requirements. This algorithm is then compared with the traditional ABC for path planning. Unlike previous algorithms, this study uses the RRT algorithm to find several extend points, choose the best extend point to move the bees. Because the Artificial Bee Colony algorithm is simply structured, easy to operate and quickly converges, it is able to address the problems of slow convergence and easy entrapment in local optimal solutions encountered in previous path planning algorithms. Although RRT has excellent characteristics in terms of the search area which is unknown, it is unstable for each planning. Thus, this thesis combines the characteristics of the artificial bee colony algorithm with the RRT algorithms, and considers the problem of robot path simulation with obstacles.
对于移动机器人来说，能够在充满各种障碍物的环境中找到合适的路径，并确保它们能够以最有效的方式从起点成功到达目标点是非常重要的，也是必要的研究课题。本文提出将人工蜂群算法(Artificial Bee Colony Algorithm, ABC)与快速探索随机树算法(rapid - explore Random Tree, RRT)相结合，产生一种新的算法来满足这些导航需求。将该算法与传统的ABC算法进行了路径规划比较。与以往的算法不同，本研究使用RRT算法寻找多个延伸点，选择最佳延伸点来移动蜜蜂。由于人工蜂群算法结构简单、易于操作、收敛速度快，能够解决以往路径规划算法收敛速度慢、容易陷入局部最优解的问题。虽然RRT在搜索区域未知方面有很好的特点，但是对于每一个规划来说都是不稳定的。因此，本文将人工蜂群算法的特点与RRT算法相结合，考虑有障碍物的机器人路径仿真问题。
{"title":"Using ABC and RRT algorithms to improve mobile robot path planning with danger degree","authors":"Y. Tusi, Hung-Yuan Chung","doi":"10.1109/FGCT.2016.7605068","DOIUrl":"https://doi.org/10.1109/FGCT.2016.7605068","url":null,"abstract":"For mobile robots, being able to find a suitable route through an environment filled with varied obstacles, and to ensure that they can successfully reach their target point from the starting point in the most efficient manner is very important, and a necessary research topic. This article proposes a combination of Artificial Bee Colony Algorithm (ABC) and Rapidly-Exploring Random Tree (RRT) to produce a novel algorithm to meet these navigation requirements. This algorithm is then compared with the traditional ABC for path planning. Unlike previous algorithms, this study uses the RRT algorithm to find several extend points, choose the best extend point to move the bees. Because the Artificial Bee Colony algorithm is simply structured, easy to operate and quickly converges, it is able to address the problems of slow convergence and easy entrapment in local optimal solutions encountered in previous path planning algorithms. Although RRT has excellent characteristics in terms of the search area which is unknown, it is unstable for each planning. Thus, this thesis combines the characteristics of the artificial bee colony algorithm with the RRT algorithms, and considers the problem of robot path simulation with obstacles.","PeriodicalId":378077,"journal":{"name":"2016 Fifth International Conference on Future Generation Communication Technologies (FGCT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133605601","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 : 2016-08-01DOI: 10.1109/FGCT.2016.7605065
Shinya Furukawa, I. S. A. Halim, Minoru Watanabe, F. Kobayashi
As one type of field programmable gate array (FPGA), optically reconfigurable gate arrays (ORGAs) have been undergoing continual development. ORGAs are optoelectronic devices consisting of a holographic memory, a laser array, a programmable gate array. Since the storage capacity of such holographic memory is greater than that of two-dimensional semiconductor memory, an ORGA can accommodate more huge gates and provide higher performance than FPGAs. A programmable gate array of an ORGA has numerous photodiodes that can be reconfigured optically using configuration contexts on a holographic memory. Although the photodiodes are normally used only for a configuration procedure, the photodiodes are useful for direct input of optical communication signals. This paper therefore presents a demonstration of optical communication on ORGA's programmable gate array.
{"title":"Direct optical communication on an optically reconfigurable gate array","authors":"Shinya Furukawa, I. S. A. Halim, Minoru Watanabe, F. Kobayashi","doi":"10.1109/FGCT.2016.7605065","DOIUrl":"https://doi.org/10.1109/FGCT.2016.7605065","url":null,"abstract":"As one type of field programmable gate array (FPGA), optically reconfigurable gate arrays (ORGAs) have been undergoing continual development. ORGAs are optoelectronic devices consisting of a holographic memory, a laser array, a programmable gate array. Since the storage capacity of such holographic memory is greater than that of two-dimensional semiconductor memory, an ORGA can accommodate more huge gates and provide higher performance than FPGAs. A programmable gate array of an ORGA has numerous photodiodes that can be reconfigured optically using configuration contexts on a holographic memory. Although the photodiodes are normally used only for a configuration procedure, the photodiodes are useful for direct input of optical communication signals. This paper therefore presents a demonstration of optical communication on ORGA's programmable gate array.","PeriodicalId":378077,"journal":{"name":"2016 Fifth International Conference on Future Generation Communication Technologies (FGCT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130759585","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 : 2016-04-13DOI: 10.1109/FGCT.2016.7605066
Ramy Amer, A. El-Sherif, Hanaa Ebrahim, A. Mokhtar
In this paper, we propose a technique for cooperation and underlay mode selection in cognitive radio networks. Hybrid spectrum sharing is assumed where the secondary user (SU) can access the primary user (PU) channel in two modes, underlay mode or cooperative mode with admission control. Overlay spectrum sharing allows the SU to occupy the spectrum only when the PU is idle. Cooperation (collaboration) occurs when the SU admits the PU's packet into a relay buffer to transmit in the subsequent timeslots, i.e. timeslots when no successful transmission from the PU source to the destination. In addition to accessing the channel in the overlay mode, secondary user is allowed to access the channel in the underlay mode by occupying the channel currently occupied by the primary user with small transmission power. It is proposed that the secondary user can exploit the underlay access only when the primary channel is at good transmission conditions or predicted to be in non-outage state. The destination sends a feedback message with the received SNR (channel quality status) to the PU source, which is overheard by the SU. The SU exploits the SNR feedback messages to build and update a belief function about the primary channel quality. The belief function leads the SU to select the best access mode each timeslot, underlay or cooperation. We characterize the maximum achievable throughput of our proposed hybrid spectrum sharing. By observing the simulation results, the proposed model attains noticeable improvement in the system performance in terms of maximum secondary user throughput than the conventional cooperation and noncooperation schemes.
{"title":"Cooperation and underlay mode selection in cognitive radio network","authors":"Ramy Amer, A. El-Sherif, Hanaa Ebrahim, A. Mokhtar","doi":"10.1109/FGCT.2016.7605066","DOIUrl":"https://doi.org/10.1109/FGCT.2016.7605066","url":null,"abstract":"In this paper, we propose a technique for cooperation and underlay mode selection in cognitive radio networks. Hybrid spectrum sharing is assumed where the secondary user (SU) can access the primary user (PU) channel in two modes, underlay mode or cooperative mode with admission control. Overlay spectrum sharing allows the SU to occupy the spectrum only when the PU is idle. Cooperation (collaboration) occurs when the SU admits the PU's packet into a relay buffer to transmit in the subsequent timeslots, i.e. timeslots when no successful transmission from the PU source to the destination. In addition to accessing the channel in the overlay mode, secondary user is allowed to access the channel in the underlay mode by occupying the channel currently occupied by the primary user with small transmission power. It is proposed that the secondary user can exploit the underlay access only when the primary channel is at good transmission conditions or predicted to be in non-outage state. The destination sends a feedback message with the received SNR (channel quality status) to the PU source, which is overheard by the SU. The SU exploits the SNR feedback messages to build and update a belief function about the primary channel quality. The belief function leads the SU to select the best access mode each timeslot, underlay or cooperation. We characterize the maximum achievable throughput of our proposed hybrid spectrum sharing. By observing the simulation results, the proposed model attains noticeable improvement in the system performance in terms of maximum secondary user throughput than the conventional cooperation and noncooperation schemes.","PeriodicalId":378077,"journal":{"name":"2016 Fifth International Conference on Future Generation Communication Technologies (FGCT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131079912","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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