Method and apparatus for reverse link rate scheduling
First Claim
1. A method for scheduling high speed transmissions on a reverse link in a communication network comprising one or more systems, each system comprising one or more base stations, each base station in communication with zero or more remote stations, said method comprising the steps of:
- determining a soft handoff status of a remote station requesting high speed transmission;
determine a reverse link capacity for each base station in communication with said remote station;
scheduling a high speed transmission rate at a base station level if said remote station is not in soft handoff;
scheduling a high speed transmission rate at a selector level if said remote station is in soft handoff with base stations which are within a same system;
scheduling a high speed transmission rate at a network level if said remote station is in soft handoff with base stations which are within different systems; and
transmitting said high speed transmission rate to said remote station;
wherein said high speed transmission rate is based on said reverse link capacity available for each base station in communication with said remote station.
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Abstract
In a communication system capable of variable rate transmission, multi-level scheduling improves utilization of the reverse link and decreases the transmission delay in data communication. Multi-level scheduling comprises base station level scheduling, selector level (system level) scheduling, and network level scheduling. Network level scheduling is performed for base station in soft handoff with base stations which are controlled by different selector scheduler. Selector level scheduling is performed for remote stations in soft handoff with base stations which are controlled by the same selector scheduler. And base station level scheduling is performed for remote stations not in soft handoff. Base station level scheduled is performed using residual capacity after higher level scheduling have been performed. Each scheduling level can have different scheduling interval.
489 Citations
14 Claims
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1. A method for scheduling high speed transmissions on a reverse link in a communication network comprising one or more systems, each system comprising one or more base stations, each base station in communication with zero or more remote stations, said method comprising the steps of:
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determining a soft handoff status of a remote station requesting high speed transmission; determine a reverse link capacity for each base station in communication with said remote station; scheduling a high speed transmission rate at a base station level if said remote station is not in soft handoff; scheduling a high speed transmission rate at a selector level if said remote station is in soft handoff with base stations which are within a same system; scheduling a high speed transmission rate at a network level if said remote station is in soft handoff with base stations which are within different systems; and transmitting said high speed transmission rate to said remote station; wherein said high speed transmission rate is based on said reverse link capacity available for each base station in communication with said remote station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for scheduling high speed transmissions on a reverse link in a communication network comprising one or more systems, each system comprising one or more base stations, each base station in communication with zero or more remote stations, said apparatus comprising:
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channel element means for receiving reverse link transmissions from remote stations, said reverse link transmissions containing requests for high speed transmission and soft handoff status of each requesting remote station; BTS scheduler means for receiving said request for high speed transmission and said soft handoff status, said BTS scheduler means scheduling high speed transmission of remote stations not in soft handoff; selector scheduler means for receiving said request for high speed transmission and said soft handoff status, said selector scheduler means scheduling high speed transmission of remote station in soft handoff with base stations which are within the same system; and network scheduler means for receiving said request for high speed transmission and said soft handoff status, said network scheduler means scheduling high speed transmission of remote stations in soft handoff with base stations which are within different systems.
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14. A circuit for scheduling high speed transmissions on a reverse link in a communication network comprising one or more systems, each system comprising one or more base stations, each base station in communication with zero or more remote stations, said apparatus comprising:
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channel elements for receiving reverse link transmissions from remote stations, said reverse link transmissions containing requests for high speed transmission and soft handoff status of each requesting remote station; BTS schedulers for receiving said request for high speed transmission and said soft handoff status, said BTS schedulers scheduling high speed transmission of remote stations not in soft handoff; selector schedulers for receiving said request for high speed transmission and said soft handoff status, said selector scheduler scheduling high speed transmission of remote station in soft handoff with base stations which are within the same system; and network scheduler for receiving said request for high speed transmission and said soft handoff status, said network scheduler scheduling high speed transmission of remote stations in soft handoff with base stations which are within different systems.
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Specification