Automatic learning of wireless coverage

Details Automatic learning of wireless coverage Automatic learning of wireless coverage

1996-12-23

1999-03-16

Cumming, William

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455456, H04Q 722

Patent

active

058841636

ABSTRACT:
Using feedback by a system controller from wireless handsets to determine sub-areas which do not have coverage within a wireless telecommunication system. A system controller is responsive to the inability of a wireless handset to handoff to a base station, to record this fact, and requests that the wireless handset continue to monitor for a base station with sufficient transmission power. Note, the active call is lost when the handoff did not occur. When the wireless handset finds a base station that has sufficient transmission power on which to register, the wireless handset registers on this base station and sends a message to the system controller advising it of the failed handoff and the duration that occurred before a new base station was found. The system controller is responsive to this information to maintain a table for each base station from which a successful handoff could not be performed due to the lack of coverage. The system controller also instructs inactive wireless handsets to measure the transmission strength of base stations as the wireless handset moves from location to location. The wireless handset is responsive to the inability to detect a base station of sufficient strength to report this fact to the system controller once the wireless handset comes in contact with a base station that it can register on. The system controller records this information in the same table as is utilized for failed handoffs.

REFERENCES:
patent: 5602903 (1997-02-01), Leblanc et al.

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