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基于多队列缓冲池的紧急消息推送方法
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作者 刘鑫 张延园 林奕 《计算机与现代化》 2016年第1期50-53,93,共5页
消息推送系统作为一种主动的、定制化的消息送达形式,能够从用户的兴趣出发,主动向用户呈现所需要的信息,正在逐渐改变互联网的信息传播方式。现有消息推送系统主要针对弱实时场景设计,资讯、娱乐类消息是其主要的推送内容,不能满足一... 消息推送系统作为一种主动的、定制化的消息送达形式,能够从用户的兴趣出发,主动向用户呈现所需要的信息,正在逐渐改变互联网的信息传播方式。现有消息推送系统主要针对弱实时场景设计,资讯、娱乐类消息是其主要的推送内容,不能满足一些高可靠、低时延场景的消息推送需求。针对于此,本文提出一种多队列消息池缓存策略和二级紧急消息调度方法,提高了消息的到达率水平,同时减小了紧急消息的到达时延。实验结果表明,该方法能够有效提高消息系统的可靠性和推送效率。 展开更多
关键词 推送系统 紧急消息 缓存策略 消息调度
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一种车辆自组织网络紧急消息转播机制
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作者 吴怡 林潇 《福建师范大学学报(自然科学版)》 CAS CSCD 北大核心 2011年第6期38-43,共6页
针对道路交通中紧急路况消息如何通过车辆间通信快速向远方车辆传播的问题,提出一种应用于车辆自组织网络的紧急消息转播机制,设计在道路车辆密集和车辆稀少情况下的不同处理方法.车辆密集时,选择车辆节点进行转播而不是全部车辆转播,... 针对道路交通中紧急路况消息如何通过车辆间通信快速向远方车辆传播的问题,提出一种应用于车辆自组织网络的紧急消息转播机制,设计在道路车辆密集和车辆稀少情况下的不同处理方法.车辆密集时,选择车辆节点进行转播而不是全部车辆转播,避免网络风暴;车辆稀少时,利用反向车辆进行消息转播.分析车辆稀少时转播消息所需时间,并进行实验仿真.结果表明,该方案在车辆密集时可降低丢包率,在车辆稀少时转播时延能够满足实际要求. 展开更多
关键词 车辆自组织网络 紧急消息 广播 转播
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An Efficient Path Planning Strategy in Mobile Sink Wireless Sensor Networks
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作者 Najla Bagais Etimad Fadel Amal Al-Mansour 《Computers, Materials & Continua》 SCIE EI 2022年第10期1237-1267,共31页
Wireless sensor networks (WSNs) are considered the backbone ofthe Internet of Things (IoT), which enables sensor nodes (SNs) to achieveapplications similarly to human intelligence. However, integrating a WSNwith the I... Wireless sensor networks (WSNs) are considered the backbone ofthe Internet of Things (IoT), which enables sensor nodes (SNs) to achieveapplications similarly to human intelligence. However, integrating a WSNwith the IoT is challenging and causes issues that require careful exploration.Prolonging the lifetime of a network through appropriately utilising energyconsumption is among the essential challenges due to the limited resourcesof SNs. Thus, recent research has examined mobile sinks (MSs), which havebeen introduced to improve the overall efficiency of WSNs. MSs bear theburden of data collection instead of consuming energy at the routeing bySNs. In a network, some areas generate more data through SNs that containfrequent, urgent messages. These messages carry sensitive data that must bedelivered immediately to user applications. Collecting such messages via MSs,especially on a large scale, increases delays, which are not tolerable in some realapplications. This issue has not been studied much. Thus, the present studyutilises the advantages of the priority parameter to concentrate on these areasand proposes a new model named ‘energy efficient path planning of MS-basedarea priority’ (EEPP-BAP). This method involves non-urgent and urgentmessages. It is comprised of four procedures. Initially, after SNs are distributedrandomly in a wide monitoring field, the monitoring field is partitionedinto equal zones according to priority, either differently or equally. Next isclustering based on the cluster head (CH) selected to perform the particleswarm optimisation algorithm (PSO). Then, the MS moves first to the zoneswith higher priority and less distance to perform the brain storm optimisationalgorithm. Finally, for urgent messages from the other zones at which theMS continues, the proposed approach establishes a routeing technique usingmulti-hop communication based on the MS position and using PSO. The proposed solution is aimed at delivering urgent messages to MSs free of latencyand with minimal packet loss. The sim 展开更多
关键词 Wireless sensor network PRIORITY urgent message swarm intelligence optimisation mobile sink CLUSTERING energy efficiency
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