Method and apparatus for inter-system active handoff of a hybrid subscriber unit
3 Assignments
0 Petitions
Accused Products
Abstract
A communication system provides for an active handoff of a voice call between a packet switched network and a circuit switched network. An active handoff from the packet switched network to the circuit switched network is accomplished by multicasting the call over forward links of both networks during the handoff. An active handoff from the circuit switched network to the packet switched network is accomplished by multicasting the call over reverse links of both networks during the handoff. The former handoff further may be facilitated by routing the call for each network through a same packet data control switch, and the latter handoff further may be facilitated by routing the call for each network through a same mobile switching center. In order for a subscriber unit to operate concurrently in both networks, the subscriber unit may comprise multiple transceivers or a single transceiver that is rapidly switched between the networks.
-
Citations
43 Claims
-
1-37. -37. (canceled)
-
38. A method for emulating concurrent operation by a hybrid subscriber unit in each of a network associated with a first radio frequency (RF) technology and a network associated with a second RF technology, the method comprising:
-
when transmitting, alternating between transmission via a first air interface associated with the first RF technology and transmission via a second air interface associated with the second RF technology; and
when receiving, alternating between reception via an air interface associated with the first RF technology and reception via an air interface associated with the second RF technology. - View Dependent Claims (39, 42)
-
-
40. A hybrid subscriber unit capable of operating in each of a network associated with a first radio frequency (RF) technology and a network associated with a second RF technology, the subscriber unit comprising:
-
a transceiver for transmitting and receiving RF communications; and
a processor in communication with to the transceiver that, when transmitting, alternates between transmission via an air interface associated with the first RF technology and transmission via an air interface associated with the second RF technology and, when receiving, alternates between reception via a first air interface associated with the first RF technology and reception via a second air interface associated with the second RF technology. - View Dependent Claims (41, 43)
-
Specification