Hierarchical set of frequency reuse patterns allowing cellular air and land communication
AssigneeMotorola, Inc.
InventorRobert W. Furtaw
Life of this patent
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AssigneeMotorola, Inc.
InventorRobert W. Furtaw
Estimating the term…
A cellular system (FIG. 4) is expanded to allow communication between mobile ground-based units (70 and 72) and mobile air-based units (80 and 78) where the air base units (e.g., a unit in airplane 78) operate above a threshold elevation. Mobile units below the threshold elevation level use local conventional cellular service area and cells whereas mobile units above the threshold are transferred to a frequency reuse pattern having a higher altitude of service and a larger service surface area. Switching between the air cells (41a-41g) and the land cells (26) is performed by determining if two land cell controllers operate at a same frequency both are receiving transmission from the mobile unit. If two land cells of the same frequency receive the same mobile unit transmission, then the mobile unit is above the threshold elevation and assigned to an air cell, else a land cell is used.
A method for using an appropriate frequency reuse pattern based upon altitude, the method comprising the steps of:
A method for assigning a handling of a transmission to one network node within a plurality of network nodes in a communication system, the method comprising the steps of:
A method for dynamically routing control of a transmission between a plurality of network nodes in a communication system, the method comprising the steps of:
Dependencies are inferred from the claim text.