基于物联网(internet of things,IOT)平台,设计一种物联网网关架构及设备的接入。将物联网网关分感知接口层,协议适配层,数据模型同步层,平台通信层。将感知接口层和协议适配层称为网关内部模块;数据模型同步层和平台通信层称为网关设...基于物联网(internet of things,IOT)平台,设计一种物联网网关架构及设备的接入。将物联网网关分感知接口层,协议适配层,数据模型同步层,平台通信层。将感知接口层和协议适配层称为网关内部模块;数据模型同步层和平台通信层称为网关设备接入模块。网关设备接入模块实现与网关内部模块的通信以及设备的接入,选用node. js作为运行平台,测试结果表明,可以实现多种设备的接入,实现了设备与网关设备模型数据的同步更新。展开更多
针对物联网(internet of things,IOT)开放平台,设计基于物联网开放平台的物联网网关接入方案。将物联网网关分为感知接口层,协议适配层,数据模型同步层,平台通信层四层架构实现。感知接口层和协议适配层采用C/C++和socket编程实现,数据...针对物联网(internet of things,IOT)开放平台,设计基于物联网开放平台的物联网网关接入方案。将物联网网关分为感知接口层,协议适配层,数据模型同步层,平台通信层四层架构实现。感知接口层和协议适配层采用C/C++和socket编程实现,数据模型同步层和平台通信层选用Node.JS为运行平台实现。测试结果表明,物联网网关可以实现设备的快速接入,将设备数据上传至云平台,实现了物联网网关物理实体数据与平台数据模型的更新。展开更多
A novel optical burst switching （OBS） high speed network architecture has been proposed. To verify its feasibility and evaluate its performance, just-enough-time （JET） signaling has been considered as a high perfo...A novel optical burst switching （OBS） high speed network architecture has been proposed. To verify its feasibility and evaluate its performance, just-enough-time （JET） signaling has been considered as a high performance protocol. In the proposed architecture, to avoid burst losses, firstly, a short-prior- confirmation-packet （SPCP） is sent over the control channel that simulates the events that the actual packet will experience. Once SPCP detects a drop at any of the intermediate nodes, the actual packet is not sent but the process repeats. In order to increase network utilization, cost effectiveness and to overcome some limitations of conventional OBS, inherent codes （e.g., orthogonal optical codes （OOC））, which are codified only in intensity, has been used. Through simulations, it shows that a decrease in burst loss probability, cost effectiveness and a gain in processing time are obtained when optical label processing is used as compared with electronic processing.展开更多
文摘基于物联网(internet of things,IOT)平台,设计一种物联网网关架构及设备的接入。将物联网网关分感知接口层,协议适配层,数据模型同步层,平台通信层。将感知接口层和协议适配层称为网关内部模块;数据模型同步层和平台通信层称为网关设备接入模块。网关设备接入模块实现与网关内部模块的通信以及设备的接入,选用node. js作为运行平台,测试结果表明,可以实现多种设备的接入,实现了设备与网关设备模型数据的同步更新。
文摘针对物联网(internet of things,IOT)开放平台,设计基于物联网开放平台的物联网网关接入方案。将物联网网关分为感知接口层,协议适配层,数据模型同步层,平台通信层四层架构实现。感知接口层和协议适配层采用C/C++和socket编程实现,数据模型同步层和平台通信层选用Node.JS为运行平台实现。测试结果表明,物联网网关可以实现设备的快速接入,将设备数据上传至云平台,实现了物联网网关物理实体数据与平台数据模型的更新。
文摘A novel optical burst switching （OBS） high speed network architecture has been proposed. To verify its feasibility and evaluate its performance, just-enough-time （JET） signaling has been considered as a high performance protocol. In the proposed architecture, to avoid burst losses, firstly, a short-prior- confirmation-packet （SPCP） is sent over the control channel that simulates the events that the actual packet will experience. Once SPCP detects a drop at any of the intermediate nodes, the actual packet is not sent but the process repeats. In order to increase network utilization, cost effectiveness and to overcome some limitations of conventional OBS, inherent codes （e.g., orthogonal optical codes （OOC））, which are codified only in intensity, has been used. Through simulations, it shows that a decrease in burst loss probability, cost effectiveness and a gain in processing time are obtained when optical label processing is used as compared with electronic processing.
