Virtual cell mapping in macrodiverse wireless networks with frequency hopping
First Claim
1. A system for wireless mobile communications, the system comprising:
- at least a first virtual cell including at least one sector from each of at least three adjacent base stations, each of the at least three adjacent base stations comprising a cell region partitioned into at least three sectors, the at least three adjacent base stations adapted to communicate with at least one mobile station via coordinated orthogonal frequency hopping sequences, andhopping sequence control means for controlling said coordinated orthogonal frequency hopping sequences in said at least first virtual cell by employing a single hopping sequence number and a set of mobile allocation index offsets in said at least first virtual cell, wherein said single hopping sequence number and said set of mobile allocation index offsets in the sectors comprising said at least first virtual cell is different from a hopping sequence number and a set of mobile allocation index offsets associated with sectors of said at least three adjacent base stations outside said at least first virtual cell.
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Abstract
A communication system for communication with mobile stations through a plurality of base stations at macrodiverse locations and with frequency hopping (FH). Two or more adjacent base stations communicate with mobile stations in a region between the adjacent base stations using coordinated orthogonal frequency hopping sequences. The communication system operates with virtual cells formed of physical sectors from adjacent base stations. Where base stations each operate with three sectors, virtual cells use three adjacent sectors of three adjacent base stations, respectively, and the coordinated orthogonal frequency hopping sequences are used for the adjacent sectors of each of the virtual cells. For GSM, the coordinated orthogonal frequency hopping sequences in each virtual cell are defined by a single hopping sequence number (HSN) and a set of mobile allocation index offsets (MAIOs). Fast macrodiversity switching is employed in combination with FH.
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Citations
13 Claims
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1. A system for wireless mobile communications, the system comprising:
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at least a first virtual cell including at least one sector from each of at least three adjacent base stations, each of the at least three adjacent base stations comprising a cell region partitioned into at least three sectors, the at least three adjacent base stations adapted to communicate with at least one mobile station via coordinated orthogonal frequency hopping sequences, and hopping sequence control means for controlling said coordinated orthogonal frequency hopping sequences in said at least first virtual cell by employing a single hopping sequence number and a set of mobile allocation index offsets in said at least first virtual cell, wherein said single hopping sequence number and said set of mobile allocation index offsets in the sectors comprising said at least first virtual cell is different from a hopping sequence number and a set of mobile allocation index offsets associated with sectors of said at least three adjacent base stations outside said at least first virtual cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification