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上行OFDMA系统中基于业务统计信息的高能效资源分配算法
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作者 任海豹 赵明 +1 位作者 周武旸 朱近康 《电子与信息学报》 EI CSCD 北大核心 2013年第6期1325-1330,共6页
该文研究了上行OFDMA系统中高能效资源分配问题。首先,在考虑数据包重传条件下将多用户上行OFDMA系统建模成M/G/1排队系统,该系统的业务服务速率由其分配得到的资源和当前信道共同决定。在业务平均时延约束下,建立了基于业务统计特性的... 该文研究了上行OFDMA系统中高能效资源分配问题。首先,在考虑数据包重传条件下将多用户上行OFDMA系统建模成M/G/1排队系统,该系统的业务服务速率由其分配得到的资源和当前信道共同决定。在业务平均时延约束下,建立了基于业务统计特性的能效资源分配优化模型。该问题为NP难问题,文中提出一种启发式算法,将资源分配分为两步进行:子信道数目确定和子信道分配。仿真表明,所提算法能够在保证业务平均时延的要求下,有效地提升系统能效。 展开更多
关键词 上行OFDMA系统 业务统计信息 M G 1排队系统 高能效资源分配 平均时延受限
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Design and Research on Tourism E-commerce Platform
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作者 Dongxia Wang 《International Journal of Technology Management》 2013年第1期97-99,共3页
this paper analyzes application status of tourism e-commerce in China and the Existing problems, points out that the construction of tourism e-commerce platform is an important part of the development of tourism elect... this paper analyzes application status of tourism e-commerce in China and the Existing problems, points out that the construction of tourism e-commerce platform is an important part of the development of tourism electronic commerce. The implementation of all business systems of various tourism enterprise data integration and information integration, the travel industry, all kinds of information resources for collaborative centralized management. By connecting the information management system of scattered all corporate travel value chain, realize the unified operation in the tourism e-commerce platform, improve the exchange of information and online transaction speed. According to our country' s tourism status and characteristics, from the feasibility analysis, function analysis, performance analysis and service oriented thought, this paper analyzes the system architecture of and data flow diagrams, system flow chart, PAD chart analysis of the system' s business processes. And it was analyzed and discussed briefly from the aspects of adaptability, functions, implementation strategy. 展开更多
关键词 SOA Web service tourism e-commerce service object model
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