Browsing by Author "Chen, Hao"
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Item Enabling a “Use-or-Share” Framework for PAL–GAA Sharing in CBRS Networks via Reinforcement Learning(IEEE, 2019) Tarver, Chance; Tonnemacher, Matthew; Chandrasekhar, Vikram; Chen, Hao; Ng, Boon Loong; Zhang, Jianzhong; Cavallaro, Joseph R.; Camp, JosephBy implementing reinforcement learning-aided listen-before-talk (LBT) schemes over a citizens broadband radio service (CBRS) network, we increase the spatial reuse at secondary nodes while minimizing the interference footprint on higher-tier nodes. The federal communications commission encourages “use-or-share” policies in the CBRS band across the priority access license (PAL)-general authorized access (GAA) priority tiers by opportunistically allowing the lower-priority GAA nodes to access unused higher-priority PAL spectrum. However, there is currently no mechanism to enable this cross-tier spectrum sharing. In this paper, we propose and evaluate LBT schemes that allow opportunistic access to PAL spectrum. We find that by allowing LBT in a two carrier, two eNB scenario, we see upward of 50% user perceived throughput (UPT) gains for both eNBs. Furthermore, we examine the use of ${Q}$ -learning to adapt the energy-detection threshold (EDT), combating problematic topologies, such as hidden and exposed nodes. With merely a 4% reduction in primary node UPT, we see up to 350% gains in average secondary node UPT when adapting the EDT of opportunistically transmitting nodes.Item ¿Representacion realista o vision personal? Análisis de la objectividad de Los de abajo de Mariano Azuela [Spanish Text](2006) Chen, Hao; Delden, Maarten VanContrary to what many critics have claimed, Mariano Azuela's descriptions of the Mexican Revolution of 1910 in Los de abajo are objective. Although the writer did reflect his pessimistic ideologies in his writings, he didn't distort reality or denigrate the revolution and its participants. The weakness and impractical nature of the intellectuals in the novel are common problems among intellectual revolutionaries of that time. The behavior of the peasants in Los de abajo reflects the characteristics of all the peasant class and can find many similarities in the Chinese peasants during the Chinese Revolution. The failure of Demetrio Macías is not determined by the pessimistic vision of Mariano Azuela but by the limitations of all the entire peasant class and by the failure of the intellectuals to provide the revolutionaries with effective guidance.Item Representacion realista o vision personal? Analisis de la objetividad de 'Los de abajo' de Mariano Azuela(2006) Chen, Hao; Delden, Maarten VanContrary to what many critics have claimed, Mariano Azuela's descriptions of the Mexican Revolution of 1910 in Los de abajo are objective. Although the writer did reflect his pessimistic ideologies in his writings, he didn't distort reality or denigrate the revolution and its participants. The weakness and impractical nature of the intellectuals in the novel are common problems among intellectual revolutionaries of that time. The behavior of the peasants in Los de abajo reflects the characteristics of all the peasant class and can find many similarities in the Chinese peasants during the Chinese Revolution. The failure of Demetrio Macías is not determined by the pessimistic vision of Mariano Azuela but by the limitations of all the entire peasant class and by the failure of the intellectuals to provide the revolutionaries with effective guidance.