Network assisted interference cancellation
First Claim
Patent Images
1. A method comprising:
- broadcasting control information from a first cell over a common control channel, wherein the control information is associated with a data channel transmitted by the first cell and the control information is usable by user equipment served by a second cell to mitigate interference caused by the data channel at the user equipment, wherein broadcasting the control information comprises broadcasting control information indicating at least one of an identity of user equipment served by the first cell, a spreading code used to transmit a dedicated control channel toward user equipment served by the first cell, an indication of time or frequency resources used to transmit a dedicated control channel, or demodulation information for a subset of physical resource blocks allocated to user equipment served by the first cell.
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Abstract
The present application describes embodiments of methods for network assisted interference cancellation. Some embodiments of the method include broadcasting control information from a first cell over a common control channel. The control information is associated with a data channel transmitted by the first cell and the control information is usable by user equipment served by a second cell to mitigate interference caused by the data channel at the user equipment.
15 Citations
19 Claims
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1. A method comprising:
broadcasting control information from a first cell over a common control channel, wherein the control information is associated with a data channel transmitted by the first cell and the control information is usable by user equipment served by a second cell to mitigate interference caused by the data channel at the user equipment, wherein broadcasting the control information comprises broadcasting control information indicating at least one of an identity of user equipment served by the first cell, a spreading code used to transmit a dedicated control channel toward user equipment served by the first cell, an indication of time or frequency resources used to transmit a dedicated control channel, or demodulation information for a subset of physical resource blocks allocated to user equipment served by the first cell. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method comprising:
broadcasting control information from a first cell over a common control channel, wherein the control information is associated with a data channel transmitted by the first cell and the control information is usable by user equipment served by a second cell to mitigate interference caused by the data channel at the user equipment, wherein broadcasting the control information comprises broadcasting control information indicating at least one of a modulation scheme used for transmission of the data channel, a coding scheme used for transmission of the data channel, a number of spatial layers used for transmission of the data channel, a number of codewords used for transmission of the data channel, or a precoding matrix used to precode information transmitted over the data channel.
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8. A method comprising:
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decoding, at user equipment, control information received from a first cell over a common control channel, wherein the user equipment is served by a second cell; using the control information to mitigate interference at the user equipment caused by a data channel received from the first cell; decoding the data channel using the control information received from the first cell; and mitigating the interference at the user equipment by subtracting the decoded data channel from signals received at the user equipment, wherein decoding the data channel comprises decoding the data channel using control information indicating at least one of an identity of user equipment served by the first cell, a spreading code used to transmit a dedicated control channel toward user equipment served by the first cell, an indication of time or frequency resources used transmit the dedicated control channel, or demodulation information for a subset of physical resource blocks allocated to user equipment served by the first cell. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method comprising:
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decoding, at user equipment, control information received from a first cell over a common control channel, wherein the user equipment is served by a second cell; using the control information to mitigate interface at the user equipment caused by a data channel received from the first cell; and mitigating the interference by suppressing interference caused by the data channel based on the control information without decoding the data channel, wherein mitigating the interference comprises mitigating the interference using control information indicating at least one of a modulation scheme used for transmission of the data channel, a coding scheme used for transmission of the data channel, a number of spatial layers used for transmission of the data channel, a number of codewords used for transmission of the data channel, or a precoding matrix used to precode information transmitted over the data channel.
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16. A device to provide wireless connectivity and to serve a first cell, comprising:
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at least one processor configured to; broadcast control information over a common control channel, wherein the control information is associated with a data channel transmitted by the device and the control information is usable by user equipment served by a second cell to mitigate interference caused by the data channel at the user equipment, wherein broadcasting the control information comprises broadcasting control information indicating at least one of an identity of user equipment served by the device, a spreading code used to transmit a dedicated control channel toward user equipment served by the device, an indication of time or frequency resources used to transmit a dedicated control channel, or demodulation information for a subset of physical resource blocks allocated to user equipment served by the device.
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17. A device to provide wireless connectivity and to serve a first cell, comprising:
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at least one processor configured to; broadcast control information over a common control channel, wherein the control information is associated with a data channel transmitted by the device and the control information is usable by user equipment served by a second cell to mitigate interference caused by the data channel at the user equipment, wherein broadcasting the control information comprises broadcasting control information indicating at least one of a modulation scheme used for transmission of the data channel, a coding scheme used for transmission of the data channel, a number of spatial layers used for transmission of the data channel, a number of codewords used for transmission of the data channel, or a precoding matrix used to precode information transmitted over the data channel.
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18. User equipment comprising:
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at least one processor configured to; decode control information received from a first cell over a common control channel, wherein the user equipment is served by a second cell; use the control information to mitigate interference at the user equipment caused by a data channel received from the first cell; decode the data channel using the control information received from the first cell; and mitigate the interference at the user equipment by subtracting the decoded data channel from signals received at the user equipment, wherein decoding the data channel comprises decoding the data channel using control information indicating at least one of an identity of user equipment served by the first cell, a spreading code used to transmit a dedicated control channel toward user equipment served by the first cell, an indication of time or frequency resources used transmit the dedicated control channel, or demodulation information for a subset of physical resource blocks allocated to user equipment served by the first cell.
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19. User equipment comprising:
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at least one processor configured to; decode control information received from a first cell over a common control channel, wherein the user equipment is served by a second cell; use the control information to mitigate interference at the user equipment caused by a data channel received from the first cell; and mitigate the interference by suppressing interference caused by the data channel based on the control information without decoding the data channel, wherein mitigating the interference comprises mitigating the interference using control information indicating at least one of a modulation scheme used for transmission of the data channel, a coding scheme used for transmission of the data channel, a number of spatial layers used for transmission of the data channel, a number of codewords used for transmission of the data channel, or a precoding matrix used to precode information transmitted over the data channel.
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Specification