Patent ID: 7349699

Claim:
A method of determining which one of an underlay carrier and an overlay carrier is to carry traffic for a wireless call associated with a mobile terminal applied to each of K mobile terminals wherein K is an integer greater or equal to 1 and wherein for a mobile terminal k of the K mobile terminals where k is an integer satisfying k=1 . . . K, the method comprising: determining a resource parameter associated with a resource for carrying the traffic; determining a mobility parameter representing a mobility of the mobile terminals that is a function of/correlatable to a speed of the mobile terminal; and determining which of the underlay carrier and the overlay carrier is to carry the traffic as a function of the resource parameter and the mobility parameter, wherein determining which of the underlay carrier and the overlay carrier is to carry the traffic comprises using a transfer function T k to determine which of the underlay carrier and the overlay carrier traffic is to carry the traffic for a wireless call associated with the mobile terminal k, wherein when the wireless call associated with the mobile terminal k is assigned to the underlay carrier, the transfer function T k is given by: T k = p k , u H k , p k,u being a forward power on the underlay carrier for the call associated with the mobile terminal k and H k being a probability that the mobile terminal k will require a hard hand-off within a predetermined time, and wherein wherein the wireless call associated with the mobile terminal k is assigned to the overlay carrier, the transfer function is given by: T k = p k , o H k p k,o being forward power on the overlay carrier for the wireless call associated with the mobile terminal k.