Method and system for diversity using orthogonal frequency/division multiplexing
First Claim
1. A method for improving overall link budget in a diverse communication system, the communication system including a plurality of terrestrial mobile stations in communication with one or more receiving stations, the method comprising:
- determining relative timing differential values between the plurality of mobile stations when the mobile stations transmit to the one or more receiving stations via one or more diverse paths wherein the relative timing differential values result in a timing misalignment; and
resolving the timing misalignment by allocating the relative timing differential values among the one or more diverse paths,wherein allocating the relative timing differential values comprises performing ranging through each of the diverse paths and adjusting transmission timing to equalize the timing misalignment among the diverse paths.
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Accused Products
Abstract
A method and system for achieving a link budget improvement in a diverse OFDM radio system by addressing the timing misalignment issue that can occur due to the differences in propagation time in signals between mobile stations and Radio Access Nodes. Timing misalignment is shared or split between the primary path to a primary Radio Access Node and a diverse path to a diverse Radio Access Node. The relative timing offsets between mobile stations are adjusted, the mobile stations are grouped into zones using a variety of different grouping techniques, and the transmission for each mobile station is scheduled, using one or more of a variety of scheduling techniques.
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Citations
35 Claims
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1. A method for improving overall link budget in a diverse communication system, the communication system including a plurality of terrestrial mobile stations in communication with one or more receiving stations, the method comprising:
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determining relative timing differential values between the plurality of mobile stations when the mobile stations transmit to the one or more receiving stations via one or more diverse paths wherein the relative timing differential values result in a timing misalignment; and resolving the timing misalignment by allocating the relative timing differential values among the one or more diverse paths, wherein allocating the relative timing differential values comprises performing ranging through each of the diverse paths and adjusting transmission timing to equalize the timing misalignment among the diverse paths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A base transceiver system for improving overall link budget in a diverse communication network, comprising:
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a timing differential module, the timing differential module for determining relative timing differential values between mobile stations when the mobile stations transmit via diverse paths; and a transmission module for distributing the relative timing differential values among the diverse paths, wherein the base transceiver system instructs the mobile stations to transmit ranging signals through the diverse paths and adjusts transmission timing to equalize timing error among the diverse paths. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for improving overall link budget in a diverse communication system, the communication system including a plurality of terrestrial mobile stations in communication with one or more transmitting stations, the method comprising:
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determining the relative timing differential values between the plurality of mobile stations when the mobile stations receive signals via diverse paths wherein the relative timing differential values result in a timing misalignment; and resolving the timing misalignment by allocating the relative timing differential values among the diverse paths, wherein allocating the relative timing differential values comprises performing ranging through each of the diverse paths and adjusting transmission timing to equalize the timing misalignment among the diverse paths. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification