초록 ▼

In a communications network, a network user communicates using a remote unit with another user via at least one base station. The network is comprised of first and second mobile switching control stations respectively controlling communications through a first set of base stations including a first

In a communications network, a network user communicates using a remote unit with another user via at least one base station. The network is comprised of first and second mobile switching control stations respectively controlling communications through a first set of base stations including a first base station and through a second set of base stations including a second base station. To direct communications between the remote unit and the first and second base stations the first base station measures a round trip delay of an active communication signal between the first base station and the remote unit. The remote unit measures a first phase offset of a pilot signal received from a first candidate base station and reports it to the first mobile switching center via the first base station. The first mobile switching center calculates a candidate round trip delay between the remote unit and the first candidate base station based on the first phase offset and the round trip delay of the active communication signal. A active communication control unit accesses a measurement directed hard handoff table to determine a location of the remote unit based on the round trip delay corresponding to the first active communication signal and the candidate round trip delay.

대표청구항 ▼

[ We claim:] [25.] In a communications network in which a network user communicates through a remote unit with another user via at least one base station, said network including first and second mobile switching centers for respectively controlling communications through a first set of base stations

[ We claim:] [25.] In a communications network in which a network user communicates through a remote unit with another user via at least one base station, said network including first and second mobile switching centers for respectively controlling communications through a first set of base stations including a first base station and through a second set of base stations including a second base station, a method for directing communications between said remote unit and said first and second base stations comprising the steps of:measuring at said first base station a round trip delay of an active communication signal between said first base station and said remote unit;entering a measurement directed hard handoff state by an active communication control unit located in said first mobile switching center; andaccessing by said active communication control unit a measurement directed hard handoff table to determine based on said round trip delay corresponding to said active communication signal whether a location of said remote unit corresponds to an area where a handoff is desirable;wherein said measurement directed hard handoff table comprises an entry specifying a type of action that should be taken based on said location of said remote unit.