一种多节点实时无线连接方案  

Real Time Wireless Connection Scheme for Multi-nodes

作　　者：钱光明 易超 QIAN Guang-ming;YI Chao(College of Information Science and Engineering,Hunan Normal University,Changsha 410081,China)

机构地区：[1]湖南师范大学信息科学与工程学院,长沙410081

出　　处：《计算机科学》2021年第S02期446-451,463,共7页Computer Science

摘　　要：文中提出了一个六同步连发无线入网方案SSST(Six Synchronous Successive Transmission),相应的网络称为SSST网络,用于一个主节点从多个从节点以无线方式收集数据的实时应用场景,工作频段与蓝牙相同。SSST网络中,所有从节点只有在收到主节点的同步包后才能发出数据传送请求,并以有序方式发出。同步包的发送采用6个连发,每一个都具有不同的编号。当多个从节点同时具有入网需求时,协议上可以做到完全无冲突,并可以选择优先级较高的从节点优先入网,后续各阶段的时间也容易做到可以预见,这些恰恰是实时应用需要具备的重要特性。通过实验,演示和验证了相关理论,并与蓝牙的广播和扫描方式做了对比。A wireless connection scheme,named six synchronous successive transmission(SSST),is presented.The network using this scheme is called SSST network.It is mainly used for the real time radio scenario where multiple slave nodes request to send data to a master node.It has the same working frequency band with the Bluetooh.Based on SSST,slave nodes are allowed to send data transmission requests after synchronous packets are received from the master only.Slaves send their requests in an arranged way.The master transmits six synchronous packets continuously,each of which has a different index.The SSST protocol is collision free when multiple slaves require connecting the master simultaneously.The slave with the higher priority can be selected to access the network first,and the response time of each consecutive stage is easy to predict.All these are just the important features that real-time applications should have.The related theories are demonstrated and verified with experiments,and compared with the advertising and scanning of the Bluetooth.

关 键 词：实时无线网 主节点 从节点 六同步连发 优先级 时槽 

分 类 号：TP316.2[自动化与计算机技术—计算机软件与理论]