HANDOFF ALGORITHM AND ARCHITECTURE FOR MOBILE SYSTEM
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United States of America Patent
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Issued Date -
Oct 1, 2009
app pub date -
Jan 29, 2009
filing date -
Mar 28, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A reference signal and handoff management (RSHM) program executing on a mobile device detects reference signals, allocates them into groups, and performs handoffs between synchronous and asynchronous sectors. Sectors are allocated to an active group. Sectors from the active group that satisfy a channel quality constraint are allocated to a second group. Sectors from the second group that satisfy a link budget constraint are allocated to a third group. The RSHM program calculates a weighted characteristic of the forward and reverse links of sectors in the third group. The RSHM program performs handoffs from current serving sectors to sectors having the largest weighted characteristic that exceeds the weighted characteristic of the current serving sector by an hysteresis amount. Battery power of the mobile device is efficiently used to perform handoffs and to manage reference signals in heterogeneous network environments by preventing unnecessary handoffs, overhead downloads, access probes and new registrations.
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