Nortel Networks Corporation

Mikhail Royz

Xixian Chen

Miroslav Budic

Karl D Mann

Marthinus Willem Da Silveira

Owen Kelly

Bob Tapadar

Yiu Ming Lam

Overlay and underlay carriers are used to transmit traffic over a cellular network for a call associated with a mobile terminal. A method involves determining which one of the underlay carrier and the overlay carrier is to carry the traffic as a function of a resource parameter associated with a resource for transmitting the traffic and a mobility parameter of the mobile terminal. In some implementations, the method is applied at for example a base station to a plurality of calls associated with various mobile terminals within a cell and the calls are assigned to the underlay carrier and the overlay carrier using an optimization routine that optimizes a function associated with the capacity while imposing a constraint such as for example a constraint on a hand-off rate between the carriers.

Method and apparatus for transmitting traffic on overlay and underlay carriers

A method and apparatus for locating, in relation to a plurality of cell sites, a mobile cellular transceiver in a conversation state. The method includes the steps of transmitting from one of the plurality of cell sites to the mobile transceiver a handoff signal for causing the mobile transceiver to continually transmit a known beacon signal while still in the conversation state, at at least some of the plurality of base stations, receiving the known beacon signal and measuring the time at which the known beacon signal was received, and calculating the location of the mobile transceiver from the respective locations of each of the at least some of the plurality of cell sites and the respective times at which the beacon signal was received at each of the at least some of the plurality of cell sites.

Method and apparatus for locating a mobile transceiver in conversation state

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Nepean, Canada

Mikhail Royz