The exploitation of Wireless Sensor Networks (WSN) is constrained by limited power, low computing power and storage and short-range radio transmission. Many routing protocols respecting these constraints were develope...The exploitation of Wireless Sensor Networks (WSN) is constrained by limited power, low computing power and storage and short-range radio transmission. Many routing protocols respecting these constraints were developed but, it still lacks formal and standardized solutions being able to help in their configuration. The configuration management that responds to this concern is very important in this type of network. It consists of the definition of data models to configure and is very necessary for the good network performance. Tangible results were obtained in traditional networks with the emergence of NETCONF and YANG standards, but on the best of our humble knowledge there are none yet in WSNs. We propose in this paper wsn-routing-protocol, a YANG data model for routing protocols configuration in WSNs. Following our model, we propose two YANG configuration data models based on the latter: they are respectively aodv for AODV and rpl for RPL.展开更多
由于SNMP(S imp le Network M anagem ent Protocol)管理系统在配置管理方面具有一定弱点。Net-conf协议被认为是解决网络配置管理问题较为有效的方法。文中采用XML Schem a描述网络管理系统的数据模型,并且为了保证Netconf配置操作的...由于SNMP(S imp le Network M anagem ent Protocol)管理系统在配置管理方面具有一定弱点。Net-conf协议被认为是解决网络配置管理问题较为有效的方法。文中采用XML Schem a描述网络管理系统的数据模型,并且为了保证Netconf配置操作的事务可靠性,在Netconf的概念模型基础之上定义了网络管理应用操作层。同时也描述了基于Netconf的网络管理系统的系统结构和实现模型,提出了用于建立网络管理应用系统的设计模式,最后介绍了开发基于XML网络管理系统的经验。展开更多
目的 :解决应用服务器出现时间偏差会导致住院患者每日汇总报表数据不一致、护士看不到医生医嘱及患者的次日用药无法领取等隐患问题。方法:通过深入分析和大量模拟实验,提出一种基于网络时间协议(network time protocol,NTP)的时间同...目的 :解决应用服务器出现时间偏差会导致住院患者每日汇总报表数据不一致、护士看不到医生医嘱及患者的次日用药无法领取等隐患问题。方法:通过深入分析和大量模拟实验,提出一种基于网络时间协议(network time protocol,NTP)的时间同步改进技术,即定时更新NTP服务器硬件时间,以防止NTP服务器因故存在的硬件时钟累积误差问题;同时,采用自动校正NTP服务器冷启动后的系统时间,避免线上的客户机与不正确的时间进行同步。结果:在时间同步微调模式下,采用脚本后的改进技术大大缩短了时间同步。观察10 s的偏差同步时间可节省7 h以上,若时间更长(<600 s),则节省时间更多。结论:缩短了在线设备与NTP服务器的同步时间,解决了极端情况下的时间偏差问题。展开更多
文摘The exploitation of Wireless Sensor Networks (WSN) is constrained by limited power, low computing power and storage and short-range radio transmission. Many routing protocols respecting these constraints were developed but, it still lacks formal and standardized solutions being able to help in their configuration. The configuration management that responds to this concern is very important in this type of network. It consists of the definition of data models to configure and is very necessary for the good network performance. Tangible results were obtained in traditional networks with the emergence of NETCONF and YANG standards, but on the best of our humble knowledge there are none yet in WSNs. We propose in this paper wsn-routing-protocol, a YANG data model for routing protocols configuration in WSNs. Following our model, we propose two YANG configuration data models based on the latter: they are respectively aodv for AODV and rpl for RPL.
文摘由于SNMP(S imp le Network M anagem ent Protocol)管理系统在配置管理方面具有一定弱点。Net-conf协议被认为是解决网络配置管理问题较为有效的方法。文中采用XML Schem a描述网络管理系统的数据模型,并且为了保证Netconf配置操作的事务可靠性,在Netconf的概念模型基础之上定义了网络管理应用操作层。同时也描述了基于Netconf的网络管理系统的系统结构和实现模型,提出了用于建立网络管理应用系统的设计模式,最后介绍了开发基于XML网络管理系统的经验。
