{"title":"Experimental verification of indoor TV White Space opportunity prediction model","authors":"Evanny Obregon, Lei Shi, J. Ferrer, J. Zander","doi":"10.4108/ICST.CROWNCOM2010.9286","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9286","url":null,"abstract":"Recent work has demonstrated that the underutilized spectrum in the Digital Television Bands, commonly referred to as TV White Space (TVWS), is a prime candidate for opportunistic spectrum access (OSA). However, a systematic assessment of the availability of this spectrum for secondary transmission was, until very recently, lacking. In a TVWS opportunity prediction model to estimate indoor secondary usage probability was proposed. In this paper we aim at verifying this model by means of measurement campaigns in both laboratory and real indoor environments. The match between the predictions from the simulation models in and measurement results suggest that the model provides a realistic evaluation of the opportunities in TVWS for low power indoor secondary usage.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126574800","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}
{"title":"Adaptive relaying strategies for collaborative spectrum sensing","authors":"Pascale Fouillot, C. Martret, R. Thobaben","doi":"10.4108/ICST.CROWNCOM2010.9263","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9263","url":null,"abstract":"We analyze and compare the performance of two adaptive relaying schemes based on the amplify-and-forward and the decode-and-forward protocols which are employed to improve the performance of collaborative spectrum sensing. As our results show, the proposed schemes allow us to improve the reliability of the communication part of the wireless sensor network. We expect that this in turn will improve the overall sensing performance and the reliability of the spectrum sensing.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126354411","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}
{"title":"Cooperative relaying in sensor networks","authors":"Deniz Gündüz, E. Erkip, A. Goldsmith, H. Poor","doi":"10.4108/ICST.CROWNCOM2010.9262","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9262","url":null,"abstract":"Reliable transmission of a discrete memoryless source over a multiple-relay network is considered. Motivated by sensor network applications, it is assumed that the relays and the destination all have access to side information correlated with the underlying source signal. Joint source-channel cooperative transmission is studied in which the relays help the transmission of the source signal to the destination by using both their overheard signals, as in the classical channel cooperation scenario, and the available correlated side information. Decode-and-forward (DF) based cooperative transmission is considered in a network of multiple relay terminals and two different achievability schemes are proposed: i) a regular encoding and sliding-window decoding scheme with no binning at the encoder, and ii) a semi-regular encoding and backward decoding scheme with explicit binning based on the side information statistics. It is shown that both of these schemes lead to the same sufficiency conditions, which are shown to be also necessary in the case of a physically degraded relay network in which the side information signals are also degraded in the same order.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"75 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132800713","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}
{"title":"Capacity analysis of OFDM / FBMC based Cognitive Radio networks with estimated CSI","authors":"Haijian Zhang, D. L. Ruyet, D. Roviras, Hong Sun","doi":"10.4108/ICST.CROWNCOM2010.9240","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9240","url":null,"abstract":"In this paper, we focus on the channel capacity analysis of a Cognitive Radio (CR) network using two types of multicarrier communications: conventional Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) and Filter Bank based Multi-Carrier (FBMC) modulations. We use a resource allocation algorithm in which subcarrier assignment and power allocation are carried out sequentially. By taking the impact of Inter-Cell Interference (ICI) resulting from timing offset into account, the maximization of total information rates is formulated, subject to maximum power constraint as well as interference constraint from Secondary User (SU) to Primary User (PU). Since the channel gain information between SU and PU can't be precisely estimated, the amount of the interference induced by SU to PU is calculated on the basis of an estimated Channel State Information (CSI), which is determined by a prescribed outage probability of primary systems. Simulation results show that FBMC can achieve higher channel capacity than OFDM, which indicates that FBMC is a potential candidate for physical layer data communication in CR context.1","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129369112","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}
S. Barbarossa, S. Sardellitti, A. Carfagna, P. Vecchiarelli
{"title":"Decentralized interference management in femtocells: A game-theoretic approach","authors":"S. Barbarossa, S. Sardellitti, A. Carfagna, P. Vecchiarelli","doi":"10.4108/ICST.CROWNCOM2010.9276","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9276","url":null,"abstract":"Femtocells are receiving considerable interest in mobile communications as a strategy to overcome the indoor coverage problems as well as to improve the efficiency of current macrocell systems. One of the most critical issues in femtocells is the potential interference between nearby femtocells and from femtocells to macrocells or to mobile handsets. In this work, we illustrate some decentralized strategies for an OFDMA femtocell system, based on game theory, where non-cooperative femtocells self-organize in order to find out the most appropriate access strategy, considering the decision phase and radio access jointly. The strategies illustrated in this work fall within the context of the FREEDOM European Project.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"900 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116386024","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}
{"title":"Flip-and-forward achieves the optimal diversity-multiplexing tradeoff for the two-hop MIMO relay channel, with two relay antennas","authors":"Ramtin Pedarsani, O. Lévêque, Sheng Yang","doi":"10.4108/ICST.CROWNCOM2010.9269","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9269","url":null,"abstract":"The flip-and-forward scheme introduced in (Yang-Belfiore, 2007) for handling communication in multi-hop MIMO relay networks was shown to achieve a better diversity-multiplexing tradeoff than pure amplify-and-forward schemes. In the present paper, we show that the flip-and-forward scheme actually achieves the optimal diversity-multiplexing tradeoff for a two-hop relay network, when the relay is equipped with two antennas.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"212 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115574104","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}
{"title":"Demand driven evolution of the Cognitive Pilot Channel","authors":"M. Muck, T. Haustein","doi":"10.4108/ICST.CROWNCOM2010.9253","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9253","url":null,"abstract":"This contribution focuses on the context of massively heterogeneous wireless communication systems and details new enabling mechanisms for guaranteeing an efficient usage of the available resources: Building on the known concept of a Cognitive Pilot Channel (CPC), the user is enabled to obtain a User Class dependent Virtual Connectivity Map (VCM) and is thus able to build on a-priori knowledge of the surrounding wireless framework for ahead planning of optimum horizontal/vertical handovers. Furthermore, it is illustrated how statistical modeling is exploited for characterizing the typical behavior of various communication systems, for example in the TV White Spaces (TVWS); the latter approach enables a statistical evaluation of the expected reliability and longevity of a radio link operated as secondary user. Finally, an Incentive Based Distributed Sensing concept is introduced which introduces a context dependent rewarding system for motivating Mobile Devices (MD) to contribute to a collaborative radio context sensing effort.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114909899","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}
{"title":"Atomic hierarchical routing games in communication networks","authors":"Vijay Kamble, E. Altman, R. E. Azouzi, V. Sharma","doi":"10.4108/ICST.CROWNCOM2010.9959","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9959","url":null,"abstract":"Theoretical studies on routing games in networks have so far dealt with reciprocal congestion effects between routing entities. But, with the advent of technologies like Cognitive Radio, we have networks which support differentiation of flows. In a two priority level model a user can be high priority or low priority and there is a cost for such a classification. The point of departure of this model from the traditional routing scenarios is the absence of reciprocity in the congestion effects: The low priority flow faces congestion from both high priority as well as low priority flow while the high priority flow is immune to the congestion effects from the low priority flow. This hierarchy is naturally present in contexts where there are primary (licensed) users and secondary (unlicensed) users who can sense their environment because there are equipped with a cognitive radio. We study such kind of routing scenarios for the cases of atomic users. We establish the existence and the uniqueness of Nash equilibrium and further we show the existence of a potential function for linear congestion costs and a certain priority classification pricing scheme. Natural applications of this model to Cognitive Radio are also pointed out.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122479818","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}
{"title":"Single carrier frequency division multiple access (SC-FDMA) for filter bank multicarrier communication systems","authors":"C. Yuen, P. Amini, B. Farhang-Boroujeny","doi":"10.4108/ICST.CROWNCOM2010.9200","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9200","url":null,"abstract":"The Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) radio standard has adopted a special form of orthogonal frequency division multiplexing (OFDM) method for the uplink of multiple access networks. This method which is called single carrier frequency division multiple access (SC-FDMA) applies a precoding to each user data set in each OFDM symbol to control its peak-to-average power ratio (PAPR). In this paper, we present a novel formulation of the SC-FDMA and explore possible mimicking the same method when filter bank multicarrier (FBMC) is used for transmission. We find that such direct application of SC-FDMA to FBMC systems is not successful. However, we show that FBMC techniques offer other opportunities that when used correctly lead to a significant reduction in PAPR.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123557787","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}
Raed F. Manna, Raymond H. Y. Louie, Yonghui Li, B. Vucetic
{"title":"Cooperative Amplify-and-Forward relaying in cognitive radio networks","authors":"Raed F. Manna, Raymond H. Y. Louie, Yonghui Li, B. Vucetic","doi":"10.4108/ICST.CROWNCOM2010.9260","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9260","url":null,"abstract":"In this paper, we consider an underlay cognitive radio network consisting of a primary transmitter (PT), a primary receiver (PR), a secondary transmitter (ST) and a secondary receiver (SR). We propose a two time slot spectrum sharing scheme based on cooperative relay transmission in addition to a practical design of the antenna weights at the ST to achieve high performance at the primary and the secondary networks. To analyze the performance of our proposed scheme, we first derive a closed form expression for the diversity order achieved at the PR and the SR. We then show through simulations that our proposed scheme, compared to conventional systems where no cooperation occurs, results in an improved quality of service at both the primary and the secondary networks, namely, the error rate and the ergodic capacity.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125534330","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}