Method of performing handoff in a cellular communication system
AssigneeMotorola, Inc.
InventorJeffrey D. Bonta
Life of this patent
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Abstract
The method consists of analyzing a handoff request received from a source base station at a source base site controller (BSC). If the handoff request contains a preferred base site list (is from a MAHO environment) the request is forwarded to the mobile switching center. If the handoff request does not contain the preferred list, the BSC generates a candidate list and transmits measurement messages to each candidate base site. The candidate base sites take measurements and reply to the BSC. The BSC uses the replies to generate a preferred base site list which is forwarded to the MSC. When the MSC receives a preferred base site list, it selects a handoff base site and executes the handoff.
Claims8
A method of performing a handoff in a cellular communication system, said method comprising the steps of:
- sending a handoff request from a source base station to a source base station controller;
- generating, in said source base station controller, a candidate list of a plurality of candidate base stations;
- transmitting a measurement request from said source base station controller to at least one of said plurality of candidate base stations on said candidate list;
- measuring a signal from a mobile station at said at least one candidate base station;
- reporting said measurement to said source base station controller;
- generating a preferred list containing said measurement from said at least one candidate base station;
- transmitting said preferred list from said source base station controller to a source mobile switching center;
- selecting a handoff base station from said preferred list;
- and
- directing a handoff of said mobile station to said handoff base station.
A method of performing a handoff in a cellular communication system, said method comprising the steps of:
- sending a handoff request from a source base station to a source base station controller;
- analyzing said handoff request received by said source base station controller to determine if said handoff request contains a preferred list of a plurality of candidate base stations;
- transmitting said handoff request to a source mobile switching center if said handoff request contains said preferred list;
- generating, in said source base station controller, a candidate list of a plurality of candidate base stations if said handoff request does not contain said preferred list;
- transmitting a measurement request from said source base station controller to at least one of said plurality of candidate base stations on said candidate list;
- measuring a signal from a mobile station at said at least one candidate base station;
- reporting said measurement to said source base station controller;
- generating a preferred list containing said measurement from said at least one candidate base station;
- transmitting said preferred list from said source base station controller to a source mobile switching center;
- selecting a handoff base station from said preferred list;
- and
- directing a handoff of said mobile station to said handoff base station.
A method of performing a handoff in a cellular communication system, said method comprising the steps of:
- sending a handoff request from a source base station to a source base station controller;
- generating, in said source base station controller, a candidate list of a plurality of candidate base stations if said source base station is an analog base station;
- transmitting said handoff request to a source mobile switching center if said source base station is a type base station other than said analog base station;
- transmitting a measurement request from said source base station controller to at least one of said plurality of candidate base stations on said candidate list;
- measuring a signal from a mobile station at said at least one candidate base station;
- reporting said measurement to said source base station controller;
- generating a preferred list containing said measurement from said at least one candidate base station;
- transmitting said preferred list from said source base station controller to a source mobile switching center;
- selecting a handoff base station from said preferred list;
- and
- directing a handoff of said mobile station to said handoff base station.
Dependencies are inferred from the claim text.