ID 原文 译文
57228 分析结果表明,与面向平均时延或平均速率最优的决策方案相比,所提方案能够提升具有特定时延需求的任务可靠性. Analysis validates that the proposed strategy can improve the task relia?bility with specific delay requirements compared with the schemes based on average delay or average rateoptimization.
57229 在内容中心网络中,全局缓存放置算法无法对新生内容实时缓存放置进行优化,对此,提出一种缓存放置与替换的联合优化算法,可减小缓存节点业务负载和用户内容获取的时延. In content centric networking ( CCN) ,in order to solve the problem that the existing global cache placement algorithm cannot optimize the cache placement for new content in real time,the global cache placement and replacement algorithm for new content cache requirements is studied,reducing the cache node load and content acquisition delay for users.
57230 定义了整网缓存收益函数,构建了最大化整网缓存收益的最优化问题,以实现新生内容的缓存放置与已存内容的缓存替换. The network-wide cache gain function is de- fined,and the optimization problem of maximizing the entire network cache gain is formulated to realize the cache placement of new contents and the cache replacement of existing contents.
57231 为了求解所提的优化问题,将所提优化问题分解为缓存放置子问题和缓存替换子问题,提出了一种全局缓存放置优化问题的次优解,缓存放置算法的性能下限为( 1 1 /e) 倍的最优解. The optimization problem is decomposed into a cache placement sub-problem and a cache replacement sub-problem. A su- boptimal solution to the global cache placement optimization problem is proposed. A collaborative cache replacement algorithm to minimize the loss of cache gain due to cache replacement is proposed.
57232 在缓存放置之后考虑多点协同的缓存替换算法,最小化由于缓存替换产生的缓存损失,最后通过迭代实现缓存放置与替换的联合优化. Finally, the joint optimization of cache placement and replacement is realized through iterations.
57233 仿真结果表明,所提联合优化算法可以提升整网缓存收益,在缓存节点负载、内容获取平均跳数和全网缓存命中率方面均优于传统方法. Simulation shows that the proposed algorithm is superior to the traditional methods in terms of cache node load,user hop count and cache hit ratio.
57234 分析了时间敏感网络控制架构的设计需求,从配置对象、架构模型、架构实现等 3 个方面指出了时间敏感网络( TSN) 控制架构的发展现状和面临的技术挑战,围绕需求感知、策略计算、策略部署等核心功能重点研究了基于网关和统一架构的 2 种实现方式,给出了 TSN 控制架构的发展趋势,为 TSN 的应用与推广奠定技术基础. In order to advance control architecture research of time-sensitive networks,the design re- quirement of time-sensitive network control architecture is analyzed. The development status and technical challenges of time sensitive network( TSN) control architecture are presented from three aspects including configuration objects,architecture models,and architecture implementations. The gateway and unified architecture based implementation models are mainly studied around core functions such as demand per- ception,strategy calculation,and strategy deployment. The development trend of TSN control architec- ture is given. It is expected to lay a technical foundation for the application and popularization of TSN through the study of TSN control architecture.
57235 为了提高通用平台网络地址转换( NAT) 的性能,设计了高性能可扩展网络地址转换系统———Quick NAT.高速网络地址转换查表算法将原始规则表划分为若干子表,并采用哈希查表算法极大地提高了 NAT 规则的查找效率; Quick network address translation ( NAT) is proposed to improve the network performance of the NAT system on the commodity server by three ways.
57236 为了充分发挥多核中央处理器( CPU) 和多队列网卡的性能优势,设计了高效的并行架构,使用本地化的连接记录表和基于比较并交换原子操作的无锁 NAT 规则表,避免了多 CPU 核访问修改全局表带来的锁开销;借助轮询取代中断、越过内核等机制,全程使用指针操作数据包,实现零拷贝,进一步降低开销. Firstly,the quick NAT search algorithm is de- signed to use the Hash search instead of the sequential search to reduce latency when looking up the NAT rule table. Secondly,to leverage the power of multi-core central processing unit ( CPU) and multi-queue network interface card,Quick NAT enables multiple CPU cores to process in parallel. The localized con- nection tracking table and the compare-and-swap based lock-free NAT Hash tables are designed to elimi- nate the lock overhead. Thirdly,Quick NAT uses the polling and zero-copy delivery to reduce the cost of interrupt and packet copies.
57237 实验结果表明,Quick NAT 可以极大地提高 NAT 查表的效率和吞吐量,具有较强的多核可扩展性,能够在 10 Gbit /s 的网络环境下实现 64 byte 小包线速. The experiment results show that Quick NAT obtains high scalability and line-rate throughput on the commodity server.