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    • Ubiquitous map image access through wireless overlay networks 

      Cai, Jianfei; Huang, Haijie; Ni, Zefeng; Chen, Chang Wen (2004)
      With the availability of various wireless link-layer technologies, such as Bluetooth, WLAN and GPRS, in one wireless device, ubiquitous communications can be realized through managing vertical handoff in the environment ...