Patent ID: 6321087
Filing Date: 2001-11-20
Classification: H04W

Abstract:
In a wireless cellular telecommunications system, comprising a mobile switching center (MSC), and a plurality of base stations, a method of retrieving call processing data for a selected call comprising the steps of:on handoff, transmitting an identity of a call record, comprising call processing data for a call, and of a handing off base station from said handing off base station to a handed off base station;storing said identities of the handing off base station and the call record in said handing off base station in a call record for said call in said handed off base station;retaining a call record for said call in said handing off base station;selecting a particular call to be monitored;responsive to said selecting, transmitting a request message comprising the stored call record identity to a predecessor (handing off) base station of said base station serving said particular call; andtransmitting data from said predecessor call record to said MSC.