The Experts below are selected from a list of 12999 Experts worldwide ranked by ideXlab platform
A. Salman Avestimehr - One of the best experts on this subject based on the ideXlab platform.
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ISIT - ITLinQ: A new approach for spectrum sharing in Device-to-Device Communication systems
2014 IEEE International Symposium on Information Theory, 2014Co-Authors: NAVID NADERIALIZADEH, A. Salman AvestimehrAbstract:We consider the problem of spectrum sharing in Device-to-Device Communication systems. Inspired by the recent optimality condition for treating interference as noise, we define a new concept of informationtheoretic independent sets (ITIS), which indicates the sets of users for which simultaneous Communication and treating the interference from each other as noise is information-theoretically optimal (to within a constant gap). Based on this concept, we develop a new spectrum sharing mechanism, called informationtheoretic link scheduling (ITLinQ), which at each time schedules those users that form an ITIS. We first provide a performance guarantee for ITLinQ by characterizing the fraction of the capacity region that it can achieve in a network with sources and destinations located randomly within a fixed area. Furthermore, we demonstrate how ITLinQ can be implemented in a distributed manner, using an initial 2-phase signaling mechanism which provides the required channel state information at all the users. Finally, through numerical analysis, we show that distributed ITLinQ can outperform similar state-ofthe-art spectrum sharing mechanisms, such as FlashLinQ, by more than a %100 of sum-rate gain, while keeping the complexity at the same level.
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ITLinQ: A new approach for spectrum sharing in Device-to-Device Communication systems
IEEE International Symposium on Information Theory - Proceedings, 2014Co-Authors: NAVID NADERIALIZADEH, A. Salman AvestimehrAbstract:We consider the problem of spectrum sharing in Device-to-Device Communication systems. Inspired by the recent optimality condition for treating interference as noise, we define a new concept of information-theoretic independent sets (ITISs), which indicates the sets of links for which simultaneous Communication and treating the interference from each other as noise is information-theoretically optimal (to within a constant gap). Based on this concept, we develop a new spectrum sharing mechanism, called information-theoretic link scheduling (ITLinQ), which at each time schedules those links that form an ITIS. We first provide a performance guarantee for ITLinQ by characterizing the fraction of the capacity region that it can achieve in a network with sources and destinations randomly located within a fixed area. Furthermore, we demonstrate how ITLinQ can be implemented in a distributed manner, using an initial two-phase signaling mechanism that provides the required channel state information at all the links. Through numerical analysis, we show that distributed ITLinQ can outperform similar state-of-the-art spectrum sharing mechanisms, such as FlashLinQ, by more than 100% of sum-rate gain, while keeping the complexity at the same level. Finally, we discuss a variation of the distributed ITLinQ scheme, which can also guarantee fairness among the links in the network and numerically evaluate its performance.
Fredrik Brännström - One of the best experts on this subject based on the ideXlab platform.
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Optimizing MDS Coded Caching in Wireless Networks With Device-to-Device Communication
IEEE Transactions on Wireless Communications, 2019Co-Authors: Jesper Pedersen, Iryna Andriyanova, Alexandre Graell I Amat, Fredrik BrännströmAbstract:We consider the caching of content in the mobile Devices in a dense wireless network using maximum distance separable (MDS) codes. We focus on an area, served by a base station (BS), where mobile Devices move around according to a random mobility model. Users requesting a particular file download the coded packets from caching Devices within a Communication range using Device-to-Device Communication. If additional packets are required to decode the file, these are downloaded from the BS. We analyze the Device mobility and derive a good approximation of the distribution of caching Devices within the Communication range of mobile Devices at any given time. We then optimize the MDS codes to minimize the network load under a cache size constraint and show that using optimized MDS codes results in significantly lower network load compared to when caching the most popular files. We further show, numerically, that caching coded packets of each file on all mobile Devices, i.e., maximal spreading, is optimal.
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Optimizing MDS Coded Caching in Wireless Networks with Device-to-Device Communication
2018Co-Authors: Jesper Pedersen, Iryna Andriyanova, Alexandre Graell I Amat, Fredrik BrännströmAbstract:We consider the caching of content in the mobile Devices in a wireless network using maximum distance separable (MDS) codes. We focus on an area, served by a base station (BS), where mobile Devices move around according to a random mobility model. Users requesting a particular file download coded symbols from caching Devices within a Communication range, using Device-to-Device Communication. If additional symbols are required to decode the file, these are downloaded from the BS. We analyze the Device mobility and derive a good approximation of the distribution of caching Devices within the Communication range of mobile Devices at any given time. We then optimize the MDS codes to minimize the network load under a cache size constraint and show that using optimized MDS codes results in significantly lower network load compared to when caching the most popular files. We further show numerically that caching coded symbols of each file on all mobile Devices, i.e., maximal spreading, is optimal.
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Distributed Storage in Mobile Wireless Networks with Device-to-Device Communication
IEEE Transactions on Communications, 2016Co-Authors: Jesper Pedersen, Alexandre I. Graell Amat, Iryna Andriyanova, Fredrik BrännströmAbstract:We consider the use of distributed storage (DS) to reduce the Communication cost of content delivery in wireless networks. Content is stored (cached) in a number of mobile Devices using an erasure correcting code. Users retrieve content from other Devices using Device-to-Device Communication or from the base station (BS), at the expense of higher Communication cost. We address the repair problem when a Device storing data leaves the cell. We introduce a repair scheduling where repair is performed periodically and derive analytical expressions for the overall Communication cost of content download and data repair as a function of the repair interval. The derived expressions are then used to evaluate the Communication cost entailed by DS using several erasure correcting codes. Our results show that DS can reduce the Communication cost with respect to the case where content is downloaded only from the BS, provided that repairs are performed frequently enough. If Devices storing content arrive to the cell, the Communication cost using DS is further reduced and, for large enough arrival rate, it is always beneficial. Interestingly, we show that MDS codes, which do not perform well for classical DS, can yield a low overall Communication cost in wireless DS.
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Distributed Storage in Mobile Wireless Networks With Device-to-Device Communication
IEEE Transactions on Communications, 2016Co-Authors: Jesper Pedersen, Iryna Andriyanova, Alexandre Graell I Amat, Fredrik BrännströmAbstract:We consider the use of distributed storage (DS) to reduce the Communication cost of content delivery in wireless networks. Content is stored (cached) in a number of mobile Devices using an erasure correcting code. Users retrieve content from other Devices using Device-to-Device Communication or from the base station (BS), at the expense of higher Communication cost. We address the repair problem when a Device storing data leaves the cell. We introduce a repair scheduling where repair is performed periodically and derive analytical expressions for the overall Communication cost of content download and data repair as a function of the repair interval. The derived expressions are then used to evaluate the Communication cost entailed by DS using several erasure correcting codes. Our results show that DS can reduce the Communication cost with respect to the case where content is downloaded only from the BS, provided that the repairs are performed frequently enough. If Devices storing content arrive to the cell, the Communication cost using DS is further reduced and, for a large enough arrival rate, it is always beneficial. Interestingly, we show that maximum distance separable codes, which do not perform well for classical DS, can yield a low overall Communication cost in wireless DS.
NAVID NADERIALIZADEH - One of the best experts on this subject based on the ideXlab platform.
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ISIT - ITLinQ: A new approach for spectrum sharing in Device-to-Device Communication systems
2014 IEEE International Symposium on Information Theory, 2014Co-Authors: NAVID NADERIALIZADEH, A. Salman AvestimehrAbstract:We consider the problem of spectrum sharing in Device-to-Device Communication systems. Inspired by the recent optimality condition for treating interference as noise, we define a new concept of informationtheoretic independent sets (ITIS), which indicates the sets of users for which simultaneous Communication and treating the interference from each other as noise is information-theoretically optimal (to within a constant gap). Based on this concept, we develop a new spectrum sharing mechanism, called informationtheoretic link scheduling (ITLinQ), which at each time schedules those users that form an ITIS. We first provide a performance guarantee for ITLinQ by characterizing the fraction of the capacity region that it can achieve in a network with sources and destinations located randomly within a fixed area. Furthermore, we demonstrate how ITLinQ can be implemented in a distributed manner, using an initial 2-phase signaling mechanism which provides the required channel state information at all the users. Finally, through numerical analysis, we show that distributed ITLinQ can outperform similar state-ofthe-art spectrum sharing mechanisms, such as FlashLinQ, by more than a %100 of sum-rate gain, while keeping the complexity at the same level.
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ITLinQ: A new approach for spectrum sharing in Device-to-Device Communication systems
IEEE International Symposium on Information Theory - Proceedings, 2014Co-Authors: NAVID NADERIALIZADEH, A. Salman AvestimehrAbstract:We consider the problem of spectrum sharing in Device-to-Device Communication systems. Inspired by the recent optimality condition for treating interference as noise, we define a new concept of information-theoretic independent sets (ITISs), which indicates the sets of links for which simultaneous Communication and treating the interference from each other as noise is information-theoretically optimal (to within a constant gap). Based on this concept, we develop a new spectrum sharing mechanism, called information-theoretic link scheduling (ITLinQ), which at each time schedules those links that form an ITIS. We first provide a performance guarantee for ITLinQ by characterizing the fraction of the capacity region that it can achieve in a network with sources and destinations randomly located within a fixed area. Furthermore, we demonstrate how ITLinQ can be implemented in a distributed manner, using an initial two-phase signaling mechanism that provides the required channel state information at all the links. Through numerical analysis, we show that distributed ITLinQ can outperform similar state-of-the-art spectrum sharing mechanisms, such as FlashLinQ, by more than 100% of sum-rate gain, while keeping the complexity at the same level. Finally, we discuss a variation of the distributed ITLinQ scheme, which can also guarantee fairness among the links in the network and numerically evaluate its performance.
Wendong Wang - One of the best experts on this subject based on the ideXlab platform.
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VTC-Fall - A Runtime Framework for Context-Sensitive Device-to-Device Communication
2017 IEEE 86th Vehicular Technology Conference (VTC-Fall), 2017Co-Authors: Yan Zhang, Zheng Song, Ye Tian, Wendong WangAbstract:Mobile applications and Internet of Things applications increasingly require one mobile Device to exchange data with another collocated Device. Despite the introduction of multiple standard Device-to-Device Communication protocols (i.e., WiFi direct, Bluetooth, Bluetooth Low Energy, NFC), transferring data across Devices remains hard for mobile programmers for three reasons. 1) different Devices support different D2D Communication interfaces, and therefore the available D2D Communication channels are dynamically decided by the peers; 2) different D2D interfaces have different features (connection establish time, data rate, energy consumption) and different performances under different contexts, complicating the decision which channel to use; 3) implementing and debugging data transmission functionalities requires knowing the low-level details of Communication protocols, which is difficult and error prone. To solve the above mentioned problem, this paper presents a runtime framework for context-sensitive Device-to-Device Communication. The presented framework consists of two major components: 1) a set of encapsulated D2D data transmission interfaces to reduce the programming efforts; 2) a context-sensitive Communication channel selection algorithm to select the optimal Communication channel as defined by the dynamic context. We design and implement the runtime framework, and evaluate its performance in terms of the required programming effort, energy consumption and data transmission latency under different contexts.
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A Runtime Framework for Context-Sensitive Device-to-Device Communication
2017 IEEE 86th Vehicular Technology Conference (VTC-Fall), 2017Co-Authors: Yan Zhang, Zheng Song, Ye Tian, Wendong WangAbstract:Mobile applications and Internet of Things applications increasingly require one mobile Device to exchange data with another collocated Device. Despite the introduction of multiple standard Device-to-Device Communication protocols (i.e., WiFi direct, Bluetooth, Bluetooth Low Energy, NFC), transferring data across Devices remains hard for mobile programmers for three reasons. 1) different Devices support different D2D Communication interfaces, and therefore the available D2D Communication channels are dynamically decided by the peers; 2) different D2D interfaces have different features (connection establish time, data rate, energy consumption) and different performances under different contexts, complicating the decision which channel to use; 3) implementing and debugging data transmission functionalities requires knowing the low-level details of Communication protocols, which is difficult and error prone. To solve the above mentioned problem, this paper presents a runtime framework for context-sensitive Device-to-Device Communication. The presented framework consists of two major components: 1) a set of encapsulated D2D data transmission interfaces to reduce the programming efforts; 2) a context-sensitive Communication channel selection algorithm to select the optimal Communication channel as defined by the dynamic context. We design and implement the runtime framework, and evaluate its performance in terms of the required programming effort, energy consumption and data transmission latency under different contexts.
Seyedvahid Dianat - One of the best experts on this subject based on the ideXlab platform.
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PST - Secure intra-Device Communication protocol between applications on a smart Device
2016 14th Annual Conference on Privacy Security and Trust (PST), 2016Co-Authors: Pei Shan Chang, Hoon Sin Cheong, Loon Wong, Seyedvahid DianatAbstract:We propose secure and efficient Communication protocol for applications executed in a mobile operating environment. It allows secure intra-Device Communication between two applications in the Device. Our motivation lies in the fact that nowadays a mobile Device is enabled as a secure token in a multi-factor authentication framework. Our protocol utilises asymmetric key pair generation in order to prevent untrusted attempt from others applications to access resources which are sandboxed by registered applications. Also, the protocol deploys login credential provider application to verify application credential and login credential before allowing two applications to communicate securely.
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Secure intra-Device Communication protocol between applications on a smart Device
2016 14th Annual Conference on Privacy Security and Trust (PST), 2016Co-Authors: Pei Shan Chang, Hoon Sin Cheong, Hon Loon Wong, Seyedvahid DianatAbstract:We propose secure and efficient Communication protocol for applications executed in a mobile operating environment. It allows secure intra-Device Communication between two applications in the Device. Our motivation lies in the fact that nowadays a mobile Device is enabled as a secure token in a multi-factor authentication framework. Our protocol utilises asymmetric key pair generation in order to prevent untrusted attempt from others applications to access resources which are sandboxed by registered applications. Also, the protocol deploys login credential provider application to verify application credential and login credential before allowing two applications to communicate securely.