Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2005-05-24
2005-05-24
Gesesse, Tilahun (Department: 2684)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S416000, C455S521000
Reexamination Certificate
active
06898436
ABSTRACT:
A method and apparatus for joining a user to a call in a group communication network provides for receiving an indication from a user who wishes to initiate a group call and sending a request to a server to add the user to the group call if the group call is in progress. The method and apparatus also provides for receiving a response from the server indicating that the group call is in progress, alerting the user of being added to the group call, and receiving media from the server after a traffic channel is re-established. The method and apparatus also provides for a significant reduction in the actual total dormancy wakeup time and latency by exchanging group call signaling even when mobiles are dormant and no traffic channel is active.
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Crockett Douglas M.
Maggenti Mark
Rosen Eric C.
Ciccozzi John L.
Gesesse Tilahun
O'Connell Robert J.
Qualcomm Incorporated
Wadsworth Philip R.
LandOfFree
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