Method and apparatus for controlling uplink transmissions of a wireless communication system
First Claim
1. A method for controlling transmissions on an uplink in a communication system, comprising:
- determining one or more characteristics of the communication system;
partitioning available system resources into a plurality of channels;
defining a plurality of back-off factors for the plurality of channels based at least in part on the one or more determined characteristics of the communication system, wherein each channel is associated with a respective back-off factor that identifies a reduction from peak transmit power level, and wherein each back-off factor ranges from zero to one; and
assigning the plurality of channels to terminals for data transmission at power levels determined based at least in part on the plurality of back-off factors, wherein at least one channel is associated with a back-off factor of one, representative of full transmit power, and remaining channels are associated with back-off factors of less than one.
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Accused Products
Abstract
Techniques to partition and allocate the available system resources among cells in a communication system, and to allocate the resources in each cell to terminals for data transmission on the uplink. In one aspect, adaptive reuse schemes are provided wherein the available system resources may be dynamically and/or adaptively partitioned and allocated to the cells based on a number of factors such as the observed interference levels, loading conditions, system requirements, and so on. A reuse plan is initially defined and may be redefined to reflect changes in the system. In another aspect, the system resources may be partitioned such that each cell is allocated a set of channels having different performance levels. In yet another aspect, terminals in each cell are scheduled for data transmission (e.g., based on their priority or load requirements) and assigned channels based on their tolerance to interference and the channels'"'"' performance.
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Citations
20 Claims
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1. A method for controlling transmissions on an uplink in a communication system, comprising:
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determining one or more characteristics of the communication system; partitioning available system resources into a plurality of channels; defining a plurality of back-off factors for the plurality of channels based at least in part on the one or more determined characteristics of the communication system, wherein each channel is associated with a respective back-off factor that identifies a reduction from peak transmit power level, and wherein each back-off factor ranges from zero to one; and assigning the plurality of channels to terminals for data transmission at power levels determined based at least in part on the plurality of back-off factors, wherein at least one channel is associated with a back-off factor of one, representative of full transmit power, and remaining channels are associated with back-off factors of less than one. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for controlling transmissions on an uplink in a communication system, comprising:
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defining a reuse pattern for the communication system, wherein the reuse pattern includes a plurality of cells; determining one or more characteristics for each cell in the communication system; partitioning available system resources into a plurality of channels; defining a plurality of back-off factors for the plurality of channels for each cell in the communication system based at least in part on the determined one or more characteristics, wherein each channel of each cell is associated with a respective back-off factor that identifies a reduction from peak transmit power level, and wherein each back-off factor ranges from zero to one; and assigning the plurality of channels in each cell to terminals within the cell for data transmission at power levels determined based at least in part on the back-off factors associated with the assigned channels, wherein the back-off factors for each cell in the reuse pattern are approximately staggered from those of neighboring cells in the reuse pattern. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification