Low capacity mobile assisted handoff in a cellular communications network
AssigneeTelefonaktiebolaget LM Ericsson
InventorGoren Rune
Life of this patent
Estimating the term…
Abstract
A method of controlling handoff in a telecommunications network is provided, the network including a land system and a plurality of mobile stations, the land system including a plurality of cells, the method comprising the steps of dividing each cell into a first region where evaluation of measurement values is performed and a second region where the evaluation of measurement values is not performed, performing an evaluation of measurement values when a mobile station enters the first region, and controlling the handoff based on the evaluation of measurement values.
Claims50
A method of controlling handoff in a telecommunications network, the network including a land system and a plurality of mobile stations, the land system including a plurality of cells, the method comprising the steps of:
- measuring continuously, by each of the mobile stations, during a call and independent Of the range from the land system, the signal quality of specified channels;
- reporting, by the mobile stations, the results of said step of measuring to the land system;
- dividing each cell into a first region where evaluation of measurement values is performed by the land system and a second region where the evaluation of measurement values is not performed by the land system;
- performing an evaluation of the measurement values when a mobile station enters the first region;
- and
- controlling the handoff in the land system based on the evaluation of the measurement values.
A method of controlling handoff in a cellular network, the network including a land system and a plurality of mobile stations, the land system including at least one cell, the method comprising:
- defining a plurality of rules in the land system and sending the plurality of rules to the plurality of mobile stations;
- continuously determining, in a mobile station, if at least one of the rules is satisfied;
- sending a first message from the mobile station to the land system responsive to the at least one of the rules being satisfied;
- and
- performing evaluation of measurement values by the land system responsive to receiving the first message.
A cellular mobile radio telephone system including a land system and a plurality of mobile stations, the land system including a plurality of base stations covering corresponding geographical areas in the system, the system comprising:
- means, provided in each of the mobile stations, for continuously monitoring signal connection parameters between the mobile stations and the land system;
- means for dividing the area covered by each base station into an evaluation region and a non-evaluation region;
- means, provided in the land system, for performing evaluation of signal connection parameters when a mobile station enters the evaluation region responsive to receiving a message from the mobile station;
- and
- means provided in the land system for controlling handoff of a call handled by one of the base stations for a neighboring base station based on the evaluation of the signal connection parameters.
A cellular mobile radio telephone system comprising:
- a plurality of base stations assigned to cover corresponding geographical areas in the cellular system;
- a plurality of mobile stations including:
- means for continuously monitoring signal connection parameters between the mobile stations and the base stations;
- and
- a land system for coordinating communications between the plurality of mobile stations and the plurality of base stations including:
- means for dividing the area covered by each base station into a first region where evaluation of the signal connection parameters is performed and a second region where the evaluation of signal connection parameters is not performed;
- means for performing the evaluation of signal connection parameters when a mobile station enters the first region responsive to a message received from the mobile station;
- and
- means for controlling handoff of a call handled by one of the base stations for a neighboring base station based on the evaluation of the signal connection parameters.
Dependencies are inferred from the claim text.