| 1. | Since 90 ' s , with the rapid development in mobile communication technology and internet technology , and extensive application in mobile computer , make many mobile nodes be able to build up connections with network in the mobile process freely 在移动计算环境中,网络具有非对称性和频繁断接性,根据网络的这种特性可以由服务器把大量热点数据组织起来,以周期性的广播提供给移动客户。 |