4Andrew S Tanenbaum,David J Wetherall.计算机网络(第五版).北京:清华大学出版社,2012.
5Jon Brodkin. Google flies Internet balloons in stratosphere for a network in the sky. Arstechnica, 2013 (10).
6Paul U, Crepaldi R, Lee J, et al. Characterizing wifi link performance in open outdoor networks. IEEE Communica- tions society conference on sensor, 2011.
7Brodkin J. Google Flies Internet Balloons in Stratosphere for a Network in the Sky. Arstechnica[J]. 2013,35(10) : 5-13.
8Paul U, Crepaldi R, Lee J, et al. Characterizing WiFi Link Performance in Open Outdoor Networks[J]. IEEE Commu- nications Society Conference on Sensor, 2011, 27 ( 4 ) : 251 -259.