Call handover in a non-geostationary satellite constellation
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United States of America Patent
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-
Sep 19, 2000
Grant Date -
N/A
app pub date -
Feb 23, 1998
filing date -
Feb 26, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Following a call set-up request emitted by a terminal of a given user of a telecommunications system using a constellation of non-geostationary satellites, the terminal reserves a channel in the cell in which it is located and in neighboring cells not including all the cells it will have to cross during a predetermined time period. For each cell where a channel has not been reserved, the given user's terminal waits until it is at a predetermined distance from its point of handover into the cell, equal to the greatest distance a user can travel in the cell, before transmitting a reservation request. The call set-up request is accepted only if a condition relating to the number of other users near the given user at the time of the call set-up request is satisfied.
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