Results 241 to 250 of about 5,522,602 (276)
Some of the next articles are maybe not open access.
Distributed Interference Cancellation for Dynamic Spectrum Sharing
2008 IEEE International Conference on Communications, 2008This paper proposes a novel interference cancellation technique using the concept of a distributed array, for the secondary use of the frequency resources in frequency division duplexing (FDD)-based cellular systems. In order to achieve efficient distributed interference cancellation, the secondary system exploit intervals for periodic training signals
Kentaro Nishimori +5 more
openaire +2 more sources
Dynamic Cooperative Spectrum Sharing in Elastic Networks
Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2013, 2013Spectrum expansion, contraction, and re-allocation policies are proposed for flexible networks. Reductions in blocking probability can be achieved by introducing “neighbor avoidance” mechanisms. Trade-offs between blocking probability and the number of re-allocated connections are quantified.
Eleni Palkopoulou +6 more
openaire +2 more sources
Dynamic Spectrum Sharing with Multiple Primary and Secondary Users
2010 IEEE International Conference on Communications, 2010Dynamic spectrum sharing in cognitive radio networks can enhance flexibility, and as a result the efficiency of spectrum usage. In this paper, we address the problem of spectrum sharing in a cognitive radio network where multiple primary and secondary strategic-users are involved.
Peng Lin 0003 +3 more
openaire +4 more sources
A dynamic spectrum access MAC protocol based on spectrum analysis and spectrum sharing
2012 XXXVIII Conferencia Latinoamericana En Informatica (CLEI), 2012The radio spectrum is a finite resource and the current spectrum licensing model has led to a fenomenon known as spectrum scarcity. Several approaches have been presented in order to improve the effectiveness of spectrum utilization. This works main contribution is is to present an approach to opportunistic spectrum sensing and allocation focused on ...
Felipe M. Modesto +2 more
openaire +2 more sources
A Deep Q-Learning Dynamic Spectrum Sharing Experiment
ICC 2021 - IEEE International Conference on Communications, 2021We report results of an experiment in applying deep Q-learning for dynamic spectrum sharing (DSS) in the Alleys of Austin scenario from the DARPA Spectrum Collaboration Challenge. This scenario mimics mobile operations in an urban environment by up to five squads (teams) of soldiers. Each team operates its own wireless network.
John M. Shea, Tan F. Wong
openaire +2 more sources
Cooperative Caching in Dynamic Shared Spectrum Networks
IEEE Transactions on Wireless Communications, 2016This paper considers co-operation between primary and secondary users in shared spectrum radio networks via caching. We first consider a network with one channel shared between a single macro (primary) base station and multiple micro (secondary) base stations.
Dibakar Das, Alhussein A. Abouzeid
openaire +1 more source
Decolonizing Dynamic Spectrum Sharing
Spectrum sharing, including dynamic spectrum sharing, is arguably the most significant overarching feature of the new era of spectrum management. The emphasis on sharing spectrum recognizes the importance of balancing the needs of different users of an exceptionally valuable resource.Darrah Blackwater +2 more
openaire +1 more source
Characterization of the missed spectrum-access opportunities under dynamic spectrum sharing
2016 8th International Conference on Communication Systems and Networks (COMSNETS), 2016The radio frequency (RF) spectrum has been observed to be underutilized in the space, time, and frequency dimensions. To improve its utilization and meet growing demand, dynamic spectrum-sharing models are being investigated. In order to maximize the use of spectrum, we study how much of the spectrum can be potentially shared and how much is actually ...
Nilesh Khambekar +2 more
openaire +2 more sources
Dynamic spectrum sharing for two-layer cellular networks
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications, 2011Deploying femtocells faces a major challenge of causing downlink interference to the existing macrocell. This paper proposes an intelligent spectrum sharing mechanism for a two-layer cellular network, which comprises macrocells and femtocells. Because users are scheduled to access the spectrum in time-domain according to their channel conditions, the ...
Rong-Terng Juang +4 more
openaire +1 more source