全球通信网

由于自由空间量子密钥传输对将来利用卫星构建全球量子保密通信网具有重要意义，所以研究携带密钥信息的光子在自由空间中传输时如何受到大气信道的影响是十分必要的。

Because the free space quantum key distribution plays a significant role in building the global quantum secure communication network by satellites in future , it is necessary to study the effects of the atmospheric channel on photons carrying the key information while propagating in free space .

Internet是目前全球最大的计算机通信网，它遍及全球几乎所有的国家和地区。

Internet is the biggest calculator correspondence net in current world , it is almost all over the world and region .

无线局域网（WLAN）与GPRS结合而成的公用无线局域网，是一种覆盖全球的高速移动通信网，位置管理策略是其中的一项关键技术。

Public WLAN , which is the combination of WLAN and GPRS , will be one of the main mobile communication systems to cover the whole globe with high data rate . Location management is one of the key techniques .