Virtual cell mapping in macrodiverse wireless networks with frequency hopping
First Claim
1. (Original) A communication system using wireless signals for communications including downlink signals to and uplink signals from mobile stations, comprising, a plurality of base stations communicating with said mobile stations using said downlink signals and said uplink signals with frequency hopping sequences, hopping sequence control means for controlling said frequency hopping sequences at two or more adjacent ones of said base stations whereby mobile stations in a region between said two or more adjacent ones of said base stations communicate with coordinated orthogonal frequency hopping sequences.
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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.
59 Citations
34 Claims
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1. (Original) A communication system using wireless signals for communications including downlink signals to and uplink signals from mobile stations, comprising,
a plurality of base stations communicating with said mobile stations using said downlink signals and said uplink signals with frequency hopping sequences, hopping sequence control means for controlling said frequency hopping sequences at two or more adjacent ones of said base stations whereby mobile stations in a region between said two or more adjacent ones of said base stations communicate with coordinated orthogonal frequency hopping sequences.
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20. (Original) In a communication system using wireless signals for communications including downlink signals to and uplink signals from mobile stations, the method comprising,
communicating with said mobile stations with a plurality of base stations using said downlink signals and said uplink signals, managing the base station frequencies of communications with said mobile stations according to frequency hopping sequences, controlling the frequency hopping sequences for two or more adjacent ones of said base stations to have mobile stations in a region between said two or more adjacent ones of said base stations communicate with coordinated orthogonal frequency hopping sequences.
Specification