Patent ID: 6131029
Filing Date: 2000-10-10
Classification: H04W

Abstract:
A method of handoff of a priority call of a mobile from a server entity in a server cell to a target entity in a target cell, comprising:determining, by said server entity, a plurality of candidate cells for said handoff, each of said plurality of candidate cells being respectively controlled by a respective candidate entity, each said respective candidate entity being controlled in common by a higher level entity;making a determination, by said server entity, whether a necessary radio resource is available in any of said plurality of candidate cells;when said determination indicates that said necessary radio resource is not available in any of said plurality of candidate cells, selecting one of said plurality of candidate cells as said target cell and said respective candidate entity of said target cell as said target entity;when said target entity of said target cell is distinct from said server entity, sending from said server entity to said higher level entity a preemption request relating to said target entity; andpreempting said necessary radio resource in said target cell for use in said handoff of said priority call of said mobile from said server entity to said target entity.