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A method and apparatus for operating a cellular telephone system that supports performing an inter-system soft handoff is described. A subscriber unit generates a pilot strength measurement report when the pilot channel from a base station is detected. When a base station controller receiving the pi

A method and apparatus for operating a cellular telephone system that supports performing an inter-system soft handoff is described. A subscriber unit generates a pilot strength measurement report when the pilot channel from a base station is detected. When a base station controller receiving the pilot strength measurement report determines that the base station is part of a second cellular telephone system, a inter-system soft handoff request is generated. An admission control subsystem receives the inter-system soft handoff and either grants or denies the request base on the traffic level with the second cellular telephone system. In a preferred embodiment of the invention, the traffic level is determined based on link load messages received periodically by the admission control subsystem that are generated by an interface port coupled to an interconnect between the first cellular telephone system and the second cellular telephone system. The link load message include peak queue length and average frame rate information.

대표청구항 ▼

[ We claim:] [1.] A method for conducting an inter-system soft handoff of a call made by a subscriber unit between a first cellular system and a second cellular system, comprising the steps of:monitoring a traffic level exchanged between the first cellular system and the second cellular system, comp

[ We claim:] [1.] A method for conducting an inter-system soft handoff of a call made by a subscriber unit between a first cellular system and a second cellular system, comprising the steps of:monitoring a traffic level exchanged between the first cellular system and the second cellular system, comprising:monitoring a peak queue length at an interface between the first cellular system and the second cellular system; andmonitoring an average frame rate at said interface;periodically transmitting said peak queue length and said average frame rate; and granting a soft handoff request based on said traffic level.