US PATENT SUBCLASS 455 / 436
.~.~ Handoff

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

403  DF  RADIOTELEPHONE SYSTEM {12}
422  DF  .~ Zoned or cellular telephone system {14}
436.~.~ Handoff {8}
437  DF  .~.~.~> Mobile assisted or initiated
438  DF  .~.~.~> Serving site initiated
439  DF  .~.~.~> Handoff initiated by another source (e.g., target, user initiated, mobile switching center (MSC), or mobile telephone switching office (MTSO), etc.)
440  DF  .~.~.~> Based upon unit location
441  DF  .~.~.~> Based upon unit velocity
442  DF  .~.~.~> Soft handoff
443  DF  .~.~.~> Overlapping cells
444  DF  .~.~.~> Between macro and micro cells

DEFINITION

Classification: 455/436

Handoff:

(under subclass 422) Subject matter wherein a mobile station during a call is switched from a first to a second serving base station, which may be located in different cells (inter-handoff) or located within a cell (intra-handoff).

SEE OR SEARCH CLASS

370, Multiplex Communications,

331+, for handoff control in a multiplex communication system.