Wireless device handoff between wireless networks

1. A method implemented at a first wireless network to handoff a mobile wireless device to a second wireless network, the method comprising:

receiving coverage information associated with the mobile wireless device, wherein the received coverage information includes:

a physical location of the mobile wireless device, and

an indication that the mobile wireless device does not detect a signal from the second wireless network, or an indication of signal strength from the second wireless network;

determining whether the mobile wireless device is capable of being covered by the second wireless network based, at least in part, on the received coverage information, wherein the determining includes determining that the mobile wireless device is not currently covered by the second wireless network; and

transmitting a handoff request to the second wireless network based, at least in part, on a determination that the mobile wireless device is capable of being covered by the second wireless network.

2. The method of claim 1 , wherein the determining whether the mobile wireless device is capable of being covered by the second wireless network comprises accessing a coverage map that indicates that the second wireless network is capable of covering the mobile wireless device.

3. The method of claim 2 , further comprising:

receiving additional coverage information from one or more additional mobile wireless devices, wherein the additional coverage information includes physical locations associated with each of the one or more additional mobile wireless devices and indications of whether each of the one or more additional mobile wireless devices detects the second wireless network; and

generating the coverage map based on the additional coverage information.

4. The method of claim 1 , wherein the received coverage information includes the physical location of the mobile wireless device for which the second wireless network previously had coverage and a coverage map which indicates that the second wireless network is capable to cover the mobile wireless device.

5. The method of claim 1 , further comprising:

receiving a confirmation from the second wireless network that the handoff request has been accepted by the second wireless network, wherein based, at least in part, on the received confirmation, the mobile wireless device is handed off to the second wireless network.

6. The method of claim 1 , wherein the transmitting the handoff request comprises transmitting the handoff request based, at least in part, on at least one of an estimated cost to handoff the mobile wireless device to the second wireless network, or an estimated signal strength from the second wireless network at the physical location of the mobile wireless device if the handoff request is accepted.

7. The method of claim 1 , wherein the transmitting the handoff request comprises transmitting the handoff request via a wireless or a wired communication link that communicatively couples the first wireless network to the second wireless network.

8. An apparatus for a first wireless network to handoff a mobile wireless device to a second wireless network, the apparatus comprising:

a coverage manager that includes logic configured to:

receive coverage information associated with the mobile wireless device, wherein the received coverage information includes:

a physical location of the mobile wireless device, and

an indication that the mobile wireless device does not detect a signal from the second wireless network, or an indication of signal strength from the second wireless network;

determine whether the mobile wireless device is capable of being covered by the second wireless network based, at least in part, on the received coverage information, wherein the logic is further configured to determine that the mobile wireless device is not currently covered by the second wireless network but is capable of being covered by the second wireless network; and

transmit a handoff request to the second wireless network based, at least in part, on a determination that the mobile wireless device is capable of being covered by the second wireless network.

9. The apparatus of claim 8 , wherein the logic is further configured to access a coverage map that indicates that the second wireless network is capable to cover the mobile wireless device.

10. The apparatus of claim 8 , wherein the logic is further configured to:

receive additional coverage information from one or more additional mobile wireless devices, wherein the additional coverage information includes physical locations associated with each of the one or more additional mobile wireless devices and indications of whether each of the one or more additional wireless devices detects the second wireless network; and

generate a coverage map based on the additional coverage information.