| 摘要 |
An originating transceiver node sends a search message to an alternate transceiver node in response to receiving a pilot signal report message from a wireless communication device detecting a pilot signal from a detected transceiver node. The wireless communication device detects a strong pilot signal transmitted from the detected transceiver node at the same frequency used for the pilot signal transmitted by the originating transceiver node. The alternate transceiver node transmits a pilot signal at a second frequency. The pilot signal report message allows the originating transceiver node to determine at least an approximate location of the wireless communication device and to identify the alternate transceiver node as a transceiver node at least potentially able to provide wireless service to the wireless communication device. In response to the search message, the alternate transceiver node searches for uplink signals associated with a pilot signal having the first frequency. If uplink signals transmitted from the wireless communication device are detected by the alternate base station, a determination is made whether handoff to the alternate transceiver node should be performed. In some situations, the originating transceiver node may transmit a change uplink format message to the wireless communication device where the new uplink format increases the likelihood of detection of the uplink signals by the alternate transceiver node. |
