4Andrews J G. The guard zone in eireless Ad hoc networks [J]. Wireless Communication, 2007, 6 (3): 897-906.
5Stevens-- Navarro, Mohsenian-- Rad, Wong V. Connection admission control for multiservice integrated cellular/WLAN system [J]. IEEE Transactions on Vehicular Technology, 2008: 75--85.
6Huan Chen, Chih--Chuan Cheng, Hsi--Hsun Yeh. Guard --channel--based incremental and dynamic optimization on call admission control for next--generation QoS-Aware heteroge- neous systems [J]. IEEE Transactions on Vehicular Technolo- gy, 2008: 37--43.
