Method and system for a handoff in a broadcast communication system
First Claim
1. A method for handoff in a broadcast communication system, the method being operable by a subscriber station, comprising:
- receiving a list of sectors that broadcast data on a channel from one or more sectors that broadcast data on the channel;
assigning each sector with a quality metric that exceeds a maximum threshold to an active set;
assigning each sector with a quality metric that falls below a minimum threshold to an inactive set;
monitoring the broadcasted data from each sector in the active set;
assigning each sector with a quality metric that exceeds an intermediate threshold to a holding set; and
assigning each sector in the holding set to the active set if the sector remains in the holding set for a time threshold.
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Accused Products
Abstract
A method and system for a handoff in a broadcast communication system is disclosed. A subscriber assisted handoff is impractical in a broadcast communication system due to e.g., a high signaling load, a difficulty to synchronize the broadcast transmission. On the other hand, the small number of broadcast channels enables the subscriber station to perform the handoff autonomously. To streamline the autonomous handoff decision process, several distinct sets of pilot identifiers and rules for transitioning among the sets are defined. To fully integrate broadcast services with the services provided by the cellular telephone systems in a subscriber environment, a method for various handoff scenarios are analyzed.
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Citations
16 Claims
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1. A method for handoff in a broadcast communication system, the method being operable by a subscriber station, comprising:
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receiving a list of sectors that broadcast data on a channel from one or more sectors that broadcast data on the channel; assigning each sector with a quality metric that exceeds a maximum threshold to an active set; assigning each sector with a quality metric that falls below a minimum threshold to an inactive set; monitoring the broadcasted data from each sector in the active set; assigning each sector with a quality metric that exceeds an intermediate threshold to a holding set; and assigning each sector in the holding set to the active set if the sector remains in the holding set for a time threshold. - View Dependent Claims (2, 3, 4)
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5. A subscriber station comprising:
circuitry configured to receive a list of sectors that broadcast data on a channel from one or more sectors that broadcast data on the channel, assign each sector with a quality metric that exceeds a maximum threshold to the active set. assign each sector with a quality metric that falls below a minimum threshold to an inactive set, monitor the broadcasted data from each sector in the active set, assign each sector with a quality metric that exceeds an intermediate threshold to a holding set, and assign each sector in the holding set to the active set if the sector remains in the holding set for a time threshold. - View Dependent Claims (6, 7, 8)
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9. A subscriber station comprising:
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means for receiving a list of sectors that broadcast data on a channel from one or more sectors that broadcast data on the channel; means for assigning each sector with a quality metric that exceeds a maximum threshold to the active set; means for assigning each sector with a quality metric that falls below a minimum threshold to an inactive set;
means for monitoring the broadcasted data from each sector in the active set;means for assigning each sector with a quality metric that exceeds an intermediate threshold to a holding set; and means for assigning each sector in the holding set to the active set if the sector remains in the holding set for a time threshold. - View Dependent Claims (10, 11, 12)
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13. A tangible, non-transitory processor-readable medium for a handoff in a broadcast communication system, the processor-readable medium having processor-readable instructions stored thereon, comprising:
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instructions for receiving a list of sectors that broadcast data on a channel from one or more sectors that broadcast data on the channel; instructions for assigning each sector with a quality metric that exceeds a maximum threshold to the active set; instructions for assigning each sector with a quality metric that falls below a minimum threshold to an inactive set; instructions for monitoring the broadcasted data from each sector in the active set; instructions for assigning each sector with a quality metric that exceeds an intermediate threshold to a holding set; and instructions for assigning each sector in the holding set to the active set if the sector remains in the holding set for a time threshold. - View Dependent Claims (14, 15, 16)
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Specification