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Radio State Radio State Radio State Radio State 3G WWAN 3G WWAN 3G WWAN 3G WWAN Wi-Fi Wi-Fi Wi-Fi Wi-Fi WiMAX WiMAX WiMAX WiMAX GPS GPS GPS GPS Radio State Radio State Radio State 3G WWAN 3G WWAN 3G WWAN Wi-Fi Wi-Fi Wi-Fi WiMAX WiMAX WiMAX GPS GPS GPS MxN – Mixed-Network Client Use Case 3G WWAN Operating on 3G WWAN Zone 1 Zone 2 Zone 3 Plug into power jack Wakeup Wi-Fi Continue over Wi-Fi Wakeup Wi-Fi Zone 6 Zone 5 Zone 4 Airport Wi-Fi Link Going Down. Connect to Wi-Fi Home Continue session on 3G WWAN Continue session on Wi-Fi Battery level low Shutdown WiMAX Switch to 3G WWAN Operator initiated switch to WiMAX Continue session on WiMAX Shutdown Wi-Fi WiMAX WiMAX Zone 7 Zone 8 Zone 9 VCC, SIP, IMS for Call Continuity (3G WWAN Wi-Fi) 802.21, SIP, IMS for Service Continuity (Wi-Fi WiMAX) IEEE 802.21, SIP, VCC, IMS, for Network Selection and Service Continuity across multiple radios (3G WWAN Wi-Fi WiMAX) IEEE 802.21 for Network Discovery