| 摘要 |
<p>An apparatus and method of effecting hand-off of a mobile station (104) in a first wireless communication system, which has a first mobile switching node (204) operable with a first base station (208) and a second mobile switching node (220) operable with a second base station (224), and a second wireless communication system, is claimed. A handoff required message (404) is received at the first mobile switching node (204) and sent (408) to a second mobile switching node (220). A message (412) from the second mobile switching node is sent to request allocation for a handoff. In an embodiment, this message (412) is sent to the VLR of the second wireless communication system. In response, a handoff request acknowledge message (428) is received by the second mobile switching node (220) and sent to the first mobile switching node (204). An initial address message (432) is sent to initiate a circuit connection between the first mobile switching node (204) and the second mobile switching node (220). Then, the call is received from the first mobile switching node (204).</p> |
