INTERFERENCE CANCELLATION
First Claim
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1. A method for cancelling interference in a wireless network, the method comprising:
- detecting interference between a neighboring cell and a serving cell; and
cancelling the interference based at least in part on the interference being from a Dedicated Reference Signal (DRS) tone of the neighboring cell colliding with a DRS tone of the serving cell;
wherein cancelling the interference comprises;
estimating a channel of the neighboring cell based at least in part on a Dedicated Reference Signal (DRS) tone of the neighboring cell;
cancelling the interference from the neighboring cell DRS tone to estimate a serving cell channel; and
estimating the serving cell channel.
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Abstract
A method to enhance coverage and/or throughput in a heterogeneous wireless network includes detecting interference between a neighboring cell and a serving cell. The method also includes cancelling the interference using an adaptive technique based on whether the interference has colliding Common Reference Signal (CRS) tones or whether the interference has colliding Dedicated Reference Signal (DRS) tones.
22 Citations
20 Claims
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1. A method for cancelling interference in a wireless network, the method comprising:
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detecting interference between a neighboring cell and a serving cell; and cancelling the interference based at least in part on the interference being from a Dedicated Reference Signal (DRS) tone of the neighboring cell colliding with a DRS tone of the serving cell; wherein cancelling the interference comprises; estimating a channel of the neighboring cell based at least in part on a Dedicated Reference Signal (DRS) tone of the neighboring cell; cancelling the interference from the neighboring cell DRS tone to estimate a serving cell channel; and estimating the serving cell channel. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for cancelling interference in a wireless network, the method comprising:
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detecting interference between a neighboring cell and a serving cell; and cancelling the interference based at least in part on the interference being from a neighboring cell control tone or a neighboring cell data tone colliding with a Dedicated Reference Signal (DRS) tone of the serving cell or based at least in part on the interference being from a neighboring cell DRS tone colliding with a control or data tone of the serving cell; wherein cancelling the interference comprises; estimating a channel of the neighboring cell based at least in part on a CRS or Dedicated Reference Signal (DRS) tone of the neighboring cell; and cancelling the interference based at least in part on the estimated channel of the neighboring cell. - View Dependent Claims (8, 9, 10)
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11. An apparatus to enhance coverage in a wireless network, comprising:
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a memory; and at least one processor coupled to the memory and configured; to detect interference between a neighboring cell and a serving cell; and to cancel the interference based at least in part on the interference being from a Dedicated Reference Signal (DRS) tone of the neighboring cell colliding with a DRS tone of the serving cell; in which the at least one processor is further configured to cancel interference by; estimating a channel of the neighboring cell based at least in part on a Dedicated Reference Signal (DRS) tone of the channel of the neighboring cell; cancelling the interference from the neighboring cell DRS tone to estimate a serving cell channel; and estimating the serving cell channel. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An apparatus to enhance coverage in a wireless network, comprising:
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a memory; and at least one processor coupled to the memory and configured; to detect interference between a neighboring cell and a serving cell; and to cancel the interference based at least in part on the interference being from a neighboring cell control tone or a neighboring cell data tone colliding with a Dedicated Reference Signal (DRS) tone of the serving cell or based at least in part on the interference being from a neighboring cell DRS tone colliding with a control or data tone of the serving cell; wherein the at least one processor is further configured to cancel interference by; estimating a channel of the neighboring cell based at least in part on a CRS or Dedicated Reference Signal (DRS) tone of the neighboring cell; and cancelling the interference based at least in part on the estimated channel of the neighboring cell. - View Dependent Claims (18, 19, 20)
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Specification