Methods and systems to mitigate inter-cell interference
First Claim
1. A method for execution in an OFDM communications environment having a plurality of cells, comprising:
- for a transmitter corresponding to a first cell;
partitioning a time-frequency transmission resource comprising a plurality of sub-carriers over a plurality of OFDM symbol intervals into a first zone and a second zone;
in the first zone, transmitting on at least one set of sub-carriers which is used by all of the plurality of cells;
in the second zone, transmitting on at least one set of sub-carriers which is used by less than all of the plurality of cells so as to mitigate inter-cell interference.
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Accused Products
Abstract
The present invention provides methods and devices for mitigating inter-cell interference in communication environments having a plurality of cells. In some embodiments, a time-frequency transmission resource that includes multiple sub-carriers over multiple OFDM symbol intervals is partitioned into a first zone and a second zone. In the first zone, transmissions are transmitted on at least one frequency sub-band which is common to all of the plurality of cells. In the second zone, transmissions are transmitted on at least one frequency sub-band which is used by less than all of the plurality of cells, so as to mitigate inter-cell interference. In some embodiments, in the first zone transmissions are transmitted using a transmission power which is common to all of the plurality of cells and in the second zone transmissions are transmitted using a transmission power which is used by less than all of the plurality of cells so as to mitigate inter-cell interference.
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Citations
37 Claims
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1. A method for execution in an OFDM communications environment having a plurality of cells, comprising:
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for a transmitter corresponding to a first cell; partitioning a time-frequency transmission resource comprising a plurality of sub-carriers over a plurality of OFDM symbol intervals into a first zone and a second zone; in the first zone, transmitting on at least one set of sub-carriers which is used by all of the plurality of cells; in the second zone, transmitting on at least one set of sub-carriers which is used by less than all of the plurality of cells so as to mitigate inter-cell interference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 33, 35)
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23. A method for execution in an OFDM communications environment having a plurality of cells, comprising:
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for a transmitter corresponding to a first cell; partitioning an time-frequency transmission resource comprising a plurality of sub-carriers over a plurality of OFDM symbol intervals into a first zone and a second zone; transmitting in the first zone using a transmission power which is used by all of the plurality of cells; transmitting in the second zone using a transmission power which is used by less than all of the plurality of cells so as to mitigate inter-cell interference. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 34)
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36. A communication network comprising:
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a plurality of telecommunication cells, each cell comprising an OFDM transmitter, the OFDM transmitter in each respective cell adapted to; partition an time-frequency transmission resource comprising a plurality of sub-carriers over a plurality of OFDM symbol intervals into a first zone and a second zone; in the first zone, transmit on at least one set of sub-carriers which is used by all of the plurality of cells; in the second zone, transmit on at least one set of sub-carriers which is used by less than all of the plurality of cells so as to mitigate inter-cell interference. - View Dependent Claims (37)
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Specification