Pub Date : 2010-05-23DOI: 10.1109/ICCW.2010.5503874
M. Vodel, M. Caspar, W. Hardt
In this paper, we present a feasible communication concept within the field of ambient networks and cognitive radios. The approach deals with the integration of different radio modules into an embedded communication platform. Basic idea is the simultaneous coexistence of multiple independent network interfaces, which allows us to combine the advantages of different communication technologies. At the same time we bypass the disadvantages of one single radio standard with its application specific design limitations. The result is a lightweight, radio standard spanning communication system, specially in the field of mobile ad hoc networks. The approach enables interesting new ways to create a reliable, heterogeneous network infrastructure. To avoid the influences of interferences in the topology, an observer unit identifies an increasing interference behaviour based on parameters like the packet loss rate, packet transmission time or fluctuations of the signal quality. With this knowledge base, we are able to adapt the transmission technology dynamically. Thus, the system takes an active influence on the local interference level in the network. Unlike other related research projects, this concept requires no special hardware devices and no complex software architecture. Instead, our approach focuses on standardised, low cost hardware components to realise an embedded communication platform. The presented paper analyses the feasibility with application-specific simulations and evaluate the results based on real world measurements with a designed prototype platform.
{"title":"Embedded Ambient Networking - a Feasible, Lightweight Communication Concept","authors":"M. Vodel, M. Caspar, W. Hardt","doi":"10.1109/ICCW.2010.5503874","DOIUrl":"https://doi.org/10.1109/ICCW.2010.5503874","url":null,"abstract":"In this paper, we present a feasible communication concept within the field of ambient networks and cognitive radios. The approach deals with the integration of different radio modules into an embedded communication platform. Basic idea is the simultaneous coexistence of multiple independent network interfaces, which allows us to combine the advantages of different communication technologies. At the same time we bypass the disadvantages of one single radio standard with its application specific design limitations. The result is a lightweight, radio standard spanning communication system, specially in the field of mobile ad hoc networks. The approach enables interesting new ways to create a reliable, heterogeneous network infrastructure. To avoid the influences of interferences in the topology, an observer unit identifies an increasing interference behaviour based on parameters like the packet loss rate, packet transmission time or fluctuations of the signal quality. With this knowledge base, we are able to adapt the transmission technology dynamically. Thus, the system takes an active influence on the local interference level in the network. Unlike other related research projects, this concept requires no special hardware devices and no complex software architecture. Instead, our approach focuses on standardised, low cost hardware components to realise an embedded communication platform. The presented paper analyses the feasibility with application-specific simulations and evaluate the results based on real world measurements with a designed prototype platform.","PeriodicalId":422951,"journal":{"name":"2010 IEEE International Conference on Communications Workshops","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125293801","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 : 2010-05-23DOI: 10.1109/ICCW.2010.5503900
Yan Chen, Shunqing Zhang, Shugong Xu
Global warming and climate changing is among the major challenges in the 21st century. In wireless communications, green architecture design is an urgent demand for operators, not only because of the social responsibilities but also their willingness to reduce the network construction and operating cost. Previous literatures tried to tackle deployment cost and energy efficiency in a separated manner. However, these two aspects are interacting with each other and the design of green architecture needs a holistic consideration of both. In this paper, we try to shed some light on the green architecture design by analytically characterizing the open relations between energy efficiency and deployment efficiency, which is found somehow different from our intuition and there might not be a simple tradeoff between the two. This study has positive impact on the future network planning and optimization.
{"title":"Characterizing Energy Efficiency and Deployment Efficiency Relations for Green Architecture Design","authors":"Yan Chen, Shunqing Zhang, Shugong Xu","doi":"10.1109/ICCW.2010.5503900","DOIUrl":"https://doi.org/10.1109/ICCW.2010.5503900","url":null,"abstract":"Global warming and climate changing is among the major challenges in the 21st century. In wireless communications, green architecture design is an urgent demand for operators, not only because of the social responsibilities but also their willingness to reduce the network construction and operating cost. Previous literatures tried to tackle deployment cost and energy efficiency in a separated manner. However, these two aspects are interacting with each other and the design of green architecture needs a holistic consideration of both. In this paper, we try to shed some light on the green architecture design by analytically characterizing the open relations between energy efficiency and deployment efficiency, which is found somehow different from our intuition and there might not be a simple tradeoff between the two. This study has positive impact on the future network planning and optimization.","PeriodicalId":422951,"journal":{"name":"2010 IEEE International Conference on Communications Workshops","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127923921","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 : 2010-05-23DOI: 10.1109/ICCW.2010.5503927
Eleni Stai, V. Karyotis, S. Papavassiliou
Several graph structures have emerged for describing different network types and the interactions among their entities. Various properties have been identified in each of these network graphs, with no single structure bearing all the desired features that would constitute it an optimal network graph. This work aims for the first time at infusing the desired properties of a small-world network into the core structure of a wireless multi-hop network, thus embedding social structure on an artificial network that emerges in the development of wireless communication services. In this paper, topology control based approaches are proposed, serving the purpose of adding communication links in a multi-hop network in an intelligent and effective manner. Through analysis and simulation, we demonstrate how the proposed methods decrease the average path length between randomly selected node pairs and properly scale the clustering coefficient of a multi-hop network, by exploiting social structure characteristics of small-world networks, thus allowing the development of more demanding services on top of wireless multi- hop networks.
{"title":"Socially-Inspired Topology Improvements in Wireless Multi-Hop Networks","authors":"Eleni Stai, V. Karyotis, S. Papavassiliou","doi":"10.1109/ICCW.2010.5503927","DOIUrl":"https://doi.org/10.1109/ICCW.2010.5503927","url":null,"abstract":"Several graph structures have emerged for describing different network types and the interactions among their entities. Various properties have been identified in each of these network graphs, with no single structure bearing all the desired features that would constitute it an optimal network graph. This work aims for the first time at infusing the desired properties of a small-world network into the core structure of a wireless multi-hop network, thus embedding social structure on an artificial network that emerges in the development of wireless communication services. In this paper, topology control based approaches are proposed, serving the purpose of adding communication links in a multi-hop network in an intelligent and effective manner. Through analysis and simulation, we demonstrate how the proposed methods decrease the average path length between randomly selected node pairs and properly scale the clustering coefficient of a multi-hop network, by exploiting social structure characteristics of small-world networks, thus allowing the development of more demanding services on top of wireless multi- hop networks.","PeriodicalId":422951,"journal":{"name":"2010 IEEE International Conference on Communications Workshops","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116845274","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 : 2010-05-23DOI: 10.1109/ICCW.2010.5503902
Yan Sun, Haiqin Liu, Min Sik Kim
Routing is critical in wireless sensor networks (WSNs). It has been widely studied in recent years and many new protocols have been proposed. In this paper, based on observations on event-driven wireless sensor networks, we propose algorithms to reduce power consumption and improve data quality in wireless sensor networks. In our algorithms, sensor nodes reduce the sampling frequency and number of hops when there is no event, and the positive feed-back scheme wakes up sensor nodes quickly to capture an event. Our algorithms add information in packets and use negative-ACK packets instead of ACK packets to reduce bandwidth consumption.
{"title":"Energy-Efficient Routing Protocol in Event-Driven Wireless Sensor Networks","authors":"Yan Sun, Haiqin Liu, Min Sik Kim","doi":"10.1109/ICCW.2010.5503902","DOIUrl":"https://doi.org/10.1109/ICCW.2010.5503902","url":null,"abstract":"Routing is critical in wireless sensor networks (WSNs). It has been widely studied in recent years and many new protocols have been proposed. In this paper, based on observations on event-driven wireless sensor networks, we propose algorithms to reduce power consumption and improve data quality in wireless sensor networks. In our algorithms, sensor nodes reduce the sampling frequency and number of hops when there is no event, and the positive feed-back scheme wakes up sensor nodes quickly to capture an event. Our algorithms add information in packets and use negative-ACK packets instead of ACK packets to reduce bandwidth consumption.","PeriodicalId":422951,"journal":{"name":"2010 IEEE International Conference on Communications Workshops","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115612051","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 : 2010-05-23DOI: 10.1109/ICCW.2010.5503930
Abdelhamid Salahbrahim, B. Le Grand, Matthieu Latapy
This paper explores new approaches and methods to characterize post and citation dynamics in different blog communities. In particular, evolution of post popularity over time is studied, as well as information spreading cascades. This methodology goes beyond traditional approaches by defining classes of dynamic behaviors based on topological features of the post network, and by investigating the impact of topical communities on post popularity dynamics and on information spreading cascades. This methodology has been applied to a corpus of active French blogs monitored during 4 months.
{"title":"Some Insight on Dynamics of Posts and Citations in Different Blog Communities","authors":"Abdelhamid Salahbrahim, B. Le Grand, Matthieu Latapy","doi":"10.1109/ICCW.2010.5503930","DOIUrl":"https://doi.org/10.1109/ICCW.2010.5503930","url":null,"abstract":"This paper explores new approaches and methods to characterize post and citation dynamics in different blog communities. In particular, evolution of post popularity over time is studied, as well as information spreading cascades. This methodology goes beyond traditional approaches by defining classes of dynamic behaviors based on topological features of the post network, and by investigating the impact of topical communities on post popularity dynamics and on information spreading cascades. This methodology has been applied to a corpus of active French blogs monitored during 4 months.","PeriodicalId":422951,"journal":{"name":"2010 IEEE International Conference on Communications Workshops","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125402032","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 : 2010-05-23DOI: 10.1109/ICCW.2010.5503955
L. Militano, F. Fitzek, A. Iera, A. Molinaro
Reference scenarios of the present research are clusters of cooperating wireless nodes, implementing random linear network coding to enhance the throughput performance of file downloading and information spreading services. In particular, a sub-set of cluster nodes will access, through their cellular link, parts of a file to be exchanged among all cluster members. The paper focus is on the "source election" issue. The novelty of the research lies in the main problem constraints, which make it far different from (and more exacting than) traditional cluster head election problems: the source number can cover the whole range of nodes and all the nodes must be considered data destinations. We propose a source election algorithm, only based on the knowledge of the number of nodes, which is fast in converging to either the optimal or, alternatively, a satisfactory sub-optimal solution. In so doing, we exploit a performing genetic algorithm. Its observed behaviour makes us confident that the followed approach can be the winning one in conditions of null/limited awareness of node position and type of relevant available cellular links.
{"title":"A Genetic Algorithm for Source Election in Cooperative Clusters Implementing Network Coding","authors":"L. Militano, F. Fitzek, A. Iera, A. Molinaro","doi":"10.1109/ICCW.2010.5503955","DOIUrl":"https://doi.org/10.1109/ICCW.2010.5503955","url":null,"abstract":"Reference scenarios of the present research are clusters of cooperating wireless nodes, implementing random linear network coding to enhance the throughput performance of file downloading and information spreading services. In particular, a sub-set of cluster nodes will access, through their cellular link, parts of a file to be exchanged among all cluster members. The paper focus is on the \"source election\" issue. The novelty of the research lies in the main problem constraints, which make it far different from (and more exacting than) traditional cluster head election problems: the source number can cover the whole range of nodes and all the nodes must be considered data destinations. We propose a source election algorithm, only based on the knowledge of the number of nodes, which is fast in converging to either the optimal or, alternatively, a satisfactory sub-optimal solution. In so doing, we exploit a performing genetic algorithm. Its observed behaviour makes us confident that the followed approach can be the winning one in conditions of null/limited awareness of node position and type of relevant available cellular links.","PeriodicalId":422951,"journal":{"name":"2010 IEEE International Conference on Communications Workshops","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126974237","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 : 2010-05-23DOI: 10.1109/ICCW.2010.5503945
Chi-Sheng Lin, Bo-Chuan Chen, Jia-Chin Lin
Ever since the emergence of Intelligent Transportation System (ITS), there has been a rapid integration of communications and automotive electronics industry, promoting developments and trends for the new generation of telematics. Apart from the development and standardization of telematics, its field test is however attracting less attention while being a most important aspect of the issue. The purposes of this research are to set up software/field tests and propose possible improvements for IEEE 802.11p standard. Then, obtaining information from software simulation to establish a controllable field for ground tests, and analyzing the indicative parameters of packet loss and latency of Dedicated Short Range Communication (DSRC) telematics system under mobile conditions, to complete a systematic testing procedure, statistics analysis as well as a transceiver design that will improve the transmission performance.
自智能交通系统(ITS)出现以来，通信和汽车电子产业迅速融合，推动了新一代远程信息处理的发展和趋势。除了远程信息处理技术的发展和标准化之外，其现场测试是其中最重要的一个方面，但却很少受到关注。本研究的目的是建立软件/现场测试，并对IEEE 802.11p标准提出可能的改进。然后，通过软件仿真获取信息，建立可控的地面测试场，分析移动条件下DSRC (Dedicated Short Range Communication)远程信息处理系统的丢包和时延指示参数，完成系统的测试流程、统计分析以及提高传输性能的收发器设计。
{"title":"Field Test and Performance Improvement in IEEE 802.11p V2R/R2V Environments","authors":"Chi-Sheng Lin, Bo-Chuan Chen, Jia-Chin Lin","doi":"10.1109/ICCW.2010.5503945","DOIUrl":"https://doi.org/10.1109/ICCW.2010.5503945","url":null,"abstract":"Ever since the emergence of Intelligent Transportation System (ITS), there has been a rapid integration of communications and automotive electronics industry, promoting developments and trends for the new generation of telematics. Apart from the development and standardization of telematics, its field test is however attracting less attention while being a most important aspect of the issue. The purposes of this research are to set up software/field tests and propose possible improvements for IEEE 802.11p standard. Then, obtaining information from software simulation to establish a controllable field for ground tests, and analyzing the indicative parameters of packet loss and latency of Dedicated Short Range Communication (DSRC) telematics system under mobile conditions, to complete a systematic testing procedure, statistics analysis as well as a transceiver design that will improve the transmission performance.","PeriodicalId":422951,"journal":{"name":"2010 IEEE International Conference on Communications Workshops","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116486320","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 : 2010-05-23DOI: 10.1109/ICCW.2010.5503880
S. Kadhe, M. Chandra, B. Janakiram
Cognitive radio is an emerging technology that allows secondary communication in a frequency band originally allocated to one or more primary users (PUs). Secondary user (SU) usually operates in a low power profile to avoid interference with the PU and sudden appearance of a PU causes loss of data of the SU. Appropriate erasure correction coding (also called as anti-jamming coding) is, thus, required to maintain the reliability of the link. In this paper, we propose the random linear coding (RLC), which is commonly used in network coding, to be used as an anti-jamming scheme. We also propose a variant of RLC anti-jamming scheme that requires reduced complexity decoding. The throughput of both the proposed schemes is analyzed and it is shown that high throughput can be obtained at the expense of very small redundancy by carefully selecting the Galois field size.
{"title":"Random Linear Coding Based Anti-Jamming Coding Techniques for Cognitive Radio Systems","authors":"S. Kadhe, M. Chandra, B. Janakiram","doi":"10.1109/ICCW.2010.5503880","DOIUrl":"https://doi.org/10.1109/ICCW.2010.5503880","url":null,"abstract":"Cognitive radio is an emerging technology that allows secondary communication in a frequency band originally allocated to one or more primary users (PUs). Secondary user (SU) usually operates in a low power profile to avoid interference with the PU and sudden appearance of a PU causes loss of data of the SU. Appropriate erasure correction coding (also called as anti-jamming coding) is, thus, required to maintain the reliability of the link. In this paper, we propose the random linear coding (RLC), which is commonly used in network coding, to be used as an anti-jamming scheme. We also propose a variant of RLC anti-jamming scheme that requires reduced complexity decoding. The throughput of both the proposed schemes is analyzed and it is shown that high throughput can be obtained at the expense of very small redundancy by carefully selecting the Galois field size.","PeriodicalId":422951,"journal":{"name":"2010 IEEE International Conference on Communications Workshops","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116577162","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 : 2010-05-23DOI: 10.1109/ICCW.2010.5503877
Jen-Ming Wu, Tsan-Fei Yang, Hsin-Jui Chou
In this paper, we present a novel scheme that aligns the interference from the antennas of the cognitive user (CU) such that the interference to the primary user (PU) is nullified or minimized. The two-user multiple-input multiple-output (MIMO) interference channel is considered. We assume that the transmission bandwidth of the CU is wider than that of the PU, and the spectrum of the PU is called victim band. Because of the unequal transmission bandwidth, the sampling rates of the two users are not necessarily equal. Two sources of interferences are considered in the alignment. One source is the spatial interference from different antennas of the CU. The other source is the intercarrier interference (ICI) from the un-victim band of CU to the victim band of PU. An active antenna of the cognitive user is used to align with the spatial interference from the other antennas of the cognitive user and ICI such that the interference to the PU is nullified. The simulation shows that the scheme creates a greater than -200dB notch on the transmission spectrum of the victim band. This scheme allows the CU to utilize the victim band simultaneously with the PU and leads to underlay cognitive radio transmission. We also present a successive interference cancellation scheme at the cognitive receiver to detect the signal within the victim band. The error performance at the cognitive receiver of this underlay cognitive radio system is presented as well.
{"title":"MIMO Active Interference Alignment for Underlay Cognitive Radio","authors":"Jen-Ming Wu, Tsan-Fei Yang, Hsin-Jui Chou","doi":"10.1109/ICCW.2010.5503877","DOIUrl":"https://doi.org/10.1109/ICCW.2010.5503877","url":null,"abstract":"In this paper, we present a novel scheme that aligns the interference from the antennas of the cognitive user (CU) such that the interference to the primary user (PU) is nullified or minimized. The two-user multiple-input multiple-output (MIMO) interference channel is considered. We assume that the transmission bandwidth of the CU is wider than that of the PU, and the spectrum of the PU is called victim band. Because of the unequal transmission bandwidth, the sampling rates of the two users are not necessarily equal. Two sources of interferences are considered in the alignment. One source is the spatial interference from different antennas of the CU. The other source is the intercarrier interference (ICI) from the un-victim band of CU to the victim band of PU. An active antenna of the cognitive user is used to align with the spatial interference from the other antennas of the cognitive user and ICI such that the interference to the PU is nullified. The simulation shows that the scheme creates a greater than -200dB notch on the transmission spectrum of the victim band. This scheme allows the CU to utilize the victim band simultaneously with the PU and leads to underlay cognitive radio transmission. We also present a successive interference cancellation scheme at the cognitive receiver to detect the signal within the victim band. The error performance at the cognitive receiver of this underlay cognitive radio system is presented as well.","PeriodicalId":422951,"journal":{"name":"2010 IEEE International Conference on Communications Workshops","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133590178","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 : 2010-05-23DOI: 10.1109/ICCW.2010.5503875
G. El-Howayek, S. Jayaweera, K. Hakim, Gonzalo Vazquez-Vilar, Carlos Mosquera
Dynamic Spectrum Leasing (DSL) was recently proposed in [1]-[4] as a new way to achieve dynamic spectrum sharing (DSS). Unlike previously considered dynamic spectrum access (DSA) proposals, DSL allows for the spectrum owner, called the primary user, to dynamically adjust the amount of interference it is willing to tolerate from secondary users. In response, the secondary users update their transmit powers to maximize a suitably chosen reward function. In previous work, it has been shown that the best response adaptations will converge to a unique Nash equilibrium under the assumptions of a quasi-static channel conditions and for a fixed number of secondary users. In this paper, we investigate the convergence and equilibrium performance of the proposed DSL-game in the presence of slow time-varying fading and time-varying secondary system size. Our results show that while the DSL best response adaptation algorithm is reasonably robust against these dynamics, there is a trade-off between performance and the CSI update rate.
{"title":"Dynamic Spectrum Leasing (DSL) in Dynamic Channels","authors":"G. El-Howayek, S. Jayaweera, K. Hakim, Gonzalo Vazquez-Vilar, Carlos Mosquera","doi":"10.1109/ICCW.2010.5503875","DOIUrl":"https://doi.org/10.1109/ICCW.2010.5503875","url":null,"abstract":"Dynamic Spectrum Leasing (DSL) was recently proposed in [1]-[4] as a new way to achieve dynamic spectrum sharing (DSS). Unlike previously considered dynamic spectrum access (DSA) proposals, DSL allows for the spectrum owner, called the primary user, to dynamically adjust the amount of interference it is willing to tolerate from secondary users. In response, the secondary users update their transmit powers to maximize a suitably chosen reward function. In previous work, it has been shown that the best response adaptations will converge to a unique Nash equilibrium under the assumptions of a quasi-static channel conditions and for a fixed number of secondary users. In this paper, we investigate the convergence and equilibrium performance of the proposed DSL-game in the presence of slow time-varying fading and time-varying secondary system size. Our results show that while the DSL best response adaptation algorithm is reasonably robust against these dynamics, there is a trade-off between performance and the CSI update rate.","PeriodicalId":422951,"journal":{"name":"2010 IEEE International Conference on Communications Workshops","volume":"126 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114011732","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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