Balloon mesh free space optical communication with tracking and link switching
Balloon mesh free space optical communication with tracking and link switching
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DOI：
10.1109/icton.2015.7193303
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发表时间：
2015-07
期刊：
影响因子：
--
通讯作者：
M. B. Awan;S. Mohan
中科院分区：
文献类型：
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作者：
M. B. Awan;S. Mohan
在自由空间光通信网络中，光束对准是保持两个光节点之间连接的关键要求。谷歌提出了用于在高空建立网络的FSO实施例，其目标是向全球偏远地区提供互联网连接。FSO通信具有利用气球网状网络与无线光通信系统建立高带宽回程网络的潜力。由于风的作用，气球会在太空中漂移，导致相邻气球之间的FSO连接不对准。本文提出了一种跟踪漂移气球的算法，并通过对漂移气球相对于最近的另一个气球的位置进行状态估计来评估跟踪系统。我们还提出了一个备份光链路，以保持网络完整的情况下，由于一个气球与相邻的气球不对准失败。我们的方法使用基于卡尔曼滤波的状态估计技术对三维运动和速度进行估计。
Optical beam alignment is the key requirement to maintain a connection between two optical nodes in free space optical (FSO) communication networking. Google has proposed FSO embodiments for building a network at high altitude, the objective of which is to provide Internet connectivity to remote locations around the globe. FSO communication has the potential to build a high bandwidth backhaul network with wireless optical communication systems using a balloon mesh network. Due to winds, balloons can drift in space leading to the misalignment of FSO connections between adjacent balloons. In this paper, we propose an algorithm to track the drifting balloon and evaluate the tracking system by state estimation of the drifting balloon's position with respect to another nearest balloon. We also propose a backup optical link to keep the network intact in case of failure due to a balloon's misalignment with an adjacent balloon. Our approach uses Kalman filtering based state estimation technique for three dimensional movement and speed.