| 摘要 |
Location information available from a navigational system, such as the Global Positioning System (GPS) is used to transition a mobile client, such as a handset, between a Wide Area Network (WAN), such as a cellular telephone network, and a Wireless Local Area Network (WLAN), such as a system conforming to the 802.11 standard, (and vice versa), under user control and initiation, and may also be used to transition between two or more WLANs, for example, WLANs with different ranges and data rates. The transition is of a 'break-before-make' type, i.e. the mobile client is authenticated to the 'new' network via the 'old' network, disconnects from the 'old' network, and turns off the associated circuitry, turns on the circuitry needed to connect to the 'new' network, and then connects to it, overcoming problems such as mutual interference and receiver desensitization by transmitting only on one frequency band at any given time.
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