物联网中基于iBeacon的防碰撞广播方案

Anti-Collision Broadcasting Scheme Based on iBeacon in Internet of Things

针对密集物联网环境下的信号碰撞问题,提出了一种分组及时应答多个节点、降低碰撞率的广播协议.通过多周期迭代分析碰撞概率,建立了理论模型,有效地解决了大规模传感器节点并发广播信道碰撞严重的问题.使用蒙特卡洛法仿真评估延迟、容量指标,分析了影响性能的关键参数,模型计算结果与仿真结果一致.与无应答式的广播协议相比,所采用的广播应答机制可以高效确认,降低了23%的网络延迟和90%的广播碰撞,并使系统容量提升1倍.

Aiming at the problem of signal collision in the dense Internet of Things environment,an anticollision broadcasting scheme was proposed which can group respond to multiple nodes in time and reduce the collision rate.The collision probability was analyzed by multi-period iteration,and a theoretical model was established which effectively solves the serious channel collision in concurrent broadcasting of large-scale sensor nodes.Monte Carlo simulation was created to evaluate indicators such as latency,capacity,and power consumption.The key parameters affecting the performance were analyzed.The model calculation results are consistent with the simulation results.Compared with the unresponsive broadcasting protocol,the broadcast response mechanism can effectively confirm,reduce 23%network delay and 90%broadcast collision,and increase the system capacity by 100%.