Patent ID: 7092721

Claim:
A method for reducing delay associated with a call set-up for a call between an originating communication unit and a target communication unit in a radio access system (RAS), the method comprising: initiating the call between the originating communication unit and the target communication unit prior to a channel assignment; estimating a first latency between an initiation time associated with the call and a first time when the target communication unit is capable of receiving a notification of the call by comparing the first time with a wake-up time for the target communication unit using a time value associated with the RAS and a slot offset time associated with the target communication unit; estimating a second latency between the initiation time and a second time when the target communication unit is capable of receiving the notification of the call by comparing the second time with the wake-up time for the target communication unit using the time value associated with the RAS and the slot offset time associated with the target communication unit; and sending an address associated with the target communication unit to the RAS on one of a first channel and a second channel based on the first latency and the second latency.