ID 原文 译文
57378 在全双工基站使能的新型小蜂窝中，考虑用户间同频干扰对服务质量的影响，提出了一种最大化满意用户对数的上下行用户匹配策略，用于服务质量敏感的各类新型通信业务. Considering the impact of the inter-user interference on the quality of service ( QoS) in full- duplex-enabled small cells，an uplink-downlink user matching strategy was proposed with the goal of max- imizing the number of satisfied user pairs. The strategy is applicable to some newborn QoS-sensitive serv- ices.
57379 首先依据用户的速率需求和其可达的实际传 输速率，构造包含所有潜在满意上下行用户对的匹配可行图; Firstly，based on the desired rate and the achievable rate of each user，a feasible graph was estab- lished to show all the possible satisfied user pairs.
57380 再将可行图转化为单位容量网络，并证明单位容量网络的最大流数目即为最大满意用户对数目，最终由最大流路径推导出最优匹配策略. Then，the feasible graph was transformed into a unit- capacity network. The max-flow number of the unit-capacity network was proved to be the maximum num- ber of satisfied user pairs，and the optimal matching strategy can be derived from the max-flow route.
57381 仿真结果表明，所提策略可获得超出最大和速率策略两倍的满意用户对数，且仅具有多项式级的复杂度. Fi- nally，simulations demonstrated that the proposed strategy trebled the number of satisfied user pairs as the max-sum-rate strategy while maintaining polynomial complexity.
57382 无人机网络具有按需部署、灵活机动等优势，但传统陆地蜂窝网络的分析方法不再适用. Unmanned aerial vehicle ( UAV) networks can be deployed on demand and operate flexibly. However，the analytical approach for traditional terrestrial cellular networks cannot be directly applied to the UAV networks.
57383 为此，考虑了两层无人机网络中地面用户的移动性，推导了系统覆盖概率、传输速率、边界的长度强度以及用户最大移动速度约束等网络关键性能指标的解析表达式，探究了无人机部署的密度、高度、地面用户移动速度对无人机网络覆盖及切换性能的影 响. Against this background，this paper investigates the coverage and handover performance of the UAV communication systems. With the consideration of user mobility in a 2-tier UAV communication system，the analytical expressions of the coverage probability，the transmission rate，the boundary length intensity，and the maximum velocity constraint of users are derived. The impacts of the UAV density， height，and the velocity of user on the coverage and handover performance of system are examined as well.
57384 理论及仿真结果表明，自适应地调整无人机部署的密度和高度能有效提升无人机网络的覆盖及切换性能. Analytical and numerical results demonstrate that the coverage and handover performance of the UAV net- works can be effectively boosted by adaptively adjusting the density and the height of the UAVs.
57385 选取工作量证明( PoW) 和实用拜占庭容错( PBFT) 作为公/私链代表，对比分析了两者在无线网络中的系统资源消耗，为区块链类型的选择提供合理评估.首先，建立公平统一的网络模型和区块链标准流程;然后，考虑无线网络传输失败导致的区块丢失，推导分析了相应的 PoW 分叉和 PBFT 视图更换概率; In order to provide a reasonable evaluation for the choice of blockchain type，proof of work ( PoW) and practical Byzantine fault tolerance ( PBFT) are treated as the benchmark of typical public and private chains for blockchain selection evaluation，and the overhead of blockchain in wireless net- works is studied. Firstly，a fair network system and standard blockchain procedure have been provided， and then，considering the impact of block loss generated by transmission failure，the forking probability in PoW and view change probability in PBFT have been analyzed.
57386 最后，分析了无线网络规模对 PoW 和 PBFT 的通信开销和算力开销的影响.仿真结果表明，PBFT 的算力开销远小于 PoW，但 PBFT 的通信开销受节点规模的影响较大，可扩展性较差;PoW 的通信开销受节点规模的影响相对平缓，可扩展性相对较好. Moreover，how network scale affects the communication and computation overhead in PoW and PBFT has been also investigated. Finally，the experimental results show that the computational overhead of PBFT is much smaller than that of PoW，the communication overhead of PBFT is greatly affected by the scale of the node，and thus the scalability of PBFT is poor. In contrast，the overhead of PoW communication is affected by the network scale linearly， and the scalability is much better compared with PBFT.
57387 雾计算中的属性基加密技术在解决数据细粒度访问控制问题的同时也带来了用户和属性的撤销问题，对此，提出一种用户和属性可撤销的访问控制方案. In fog computing，attribute-based encryption technology not only solves the problem of fine- grained access control of data，but also brings the problem of user and attribute revocation. To solve this problem，an access control scheme that supports user and attribute revocation in fog computing is pro- posed.