CSI and ACK reporting enhancements in LTE/LTE-A with unlicensed spectrum
First Claim
1. A method of wireless communication, comprising:
- generating, by a base station, at least one of Channel State Information Reference Signal (CSI-RS) or Interference Measurement Resource (IMR); and
transmitting the CSI-RS or the IMR in a radio frame to a user equipment (UE), wherein the transmitting of the CSI-RS or the IMR includes transmitting the CSI-RS or the IMR on resources located in different resource blocks in terms of frequency, wherein the resources on which the CSI-RS or the IMR is transmitted are staggered within the radio frame between slots within a subframe.
1 Assignment
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Accused Products
Abstract
Channel state information (CSI) and acknowledgement (ACK) reporting enhancements in Long Term Evolution (LTE)/LTE-Advanced (LTE-A) enabling communications over an unlicensed spectrum are disclosed. For example, ACK/NAK may include unlicensed spectrum interference information, such as WIFI interference. Additionally, in anticipation of a future downlink transmission, UEs may report WiFI interference to base stations absent a current downlink transmission. Also, CSI-RS and/or IMR resources may be staggered across subframes and/or within slots of subframes. Further, CSI reporting may include separate reports for CSI-RS resources that experience unlicensed spectrum interference and interference free CSI-RS resources. Still further, CSI reports may include a request to the base station to switch the current channel or band. Finally, inter-RAT ACK and CSI reporting may be provided on a second unlicensed spectrum band, such as a WIFI band, for a first unlicensed spectrum band, such as an LTE/LTE-A unlicensed band.
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Citations
19 Claims
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1. A method of wireless communication, comprising:
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generating, by a base station, at least one of Channel State Information Reference Signal (CSI-RS) or Interference Measurement Resource (IMR); and transmitting the CSI-RS or the IMR in a radio frame to a user equipment (UE), wherein the transmitting of the CSI-RS or the IMR includes transmitting the CSI-RS or the IMR on resources located in different resource blocks in terms of frequency, wherein the resources on which the CSI-RS or the IMR is transmitted are staggered within the radio frame between slots within a subframe. - View Dependent Claims (2, 3, 4)
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5. A method of wireless communication, comprising:
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generating, by a base station, at least one of Channel State Information Reference Signal (CSI-RS) or Interference Measurement Resource (IMR); indicating, by the base station, to other base stations at least one of; a resource staggering pattern; an IMR resource configuration; and a null tone configuration; and transmitting the CSI-RS or the IMR in a radio frame to a user equipment (UE), wherein the transmitting of the CSI-RS or the IMR includes transmitting the CSI-RS or the IMR on resources located in different resource blocks in terms of frequency, wherein the resources on which the CSI-RS or the IMR is transmitted are staggered within the radio frame at least one of; between slots within a subframe;
oracross different symbols and tones in each resource block. - View Dependent Claims (6, 7, 8)
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9. An apparatus configured for wireless communication, the apparatus comprising:
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at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configured; to generate, by a base station, at least one of Channel State Information Reference Signal (CSI-RS) or Interference Measurement Resource (IMR); and to transmit the CSI-RS or the IMR in a radio frame to a user equipment (UE), wherein the configuration to transmit includes configuration to transmit the CSI-RS or the IMR on resources located in different resource blocks in terms of frequency, wherein the resources on which the CSI-RS or the IMR is transmitted are staggered within the radio frame between slots within a subframe. - View Dependent Claims (10, 11)
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12. An apparatus configured for wireless communication, the apparatus comprising:
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at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configured; to generate, by a base station, at least one of Channel State Information Reference Signal (CSI-RS) or Interference Measurement Resource (IMR); to indicate, by the base station, to other base stations at least one of; a resource staggering pattern; an IMR resource configuration; and a null tone configuration; and to transmit the CSI-RS or the IMR in a radio frame to a user equipment (UE), wherein the configuration to transmit includes configuration to transmit the CSI-RS or the IMR on resources located in different resource blocks in terms of frequency, wherein the resources on which the CSI-RS or the IMR is transmitted are staggered within the radio frame at least one of; between slots within a subframe;
oracross different symbols and tones in each resource block.
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13. A non-transitory computer-readable medium having program code recorded thereon, comprising:
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code for causing one or more computers to generate, by a base station, at least one of Channel State Information Reference Signal (CSI-RS) or Interference Measurement Resource (IMR); and code for causing one or more computers to transmit the CSI-RS or the IMR in a radio frame to a user equipment (UE), wherein the code for causing the one or more computers to transmit includes code for causing the one or more computers to transmit the CSI-RS or the IMR on resources located in different resource blocks in terms of frequency, wherein the resources on which the CSI-RS or the IMR is transmitted are staggered within the radio frame between slots within a subframe. - View Dependent Claims (14, 15)
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16. A non-transitory computer-readable medium having program code recorded thereon, comprising:
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code for causing one or more computers to generate, by a base station, at least one of Channel State Information Reference Signal (CSI-RS) or Interference Measurement Resource (IMR); code for causing the one or more computers to indicate, by the base station, to other base stations at least one of; a resource staggering pattern; an IMR resource configuration; and a null tone configuration; and code for causing one or more computers to transmit the CSI-RS or the IMR in a radio frame to a user equipment (UE), wherein the code for causing the one or more computers to transmit includes code for causing the one or more computers to transmit the CSI-RS or the IMR on resources located in different resource blocks in terms of frequency, wherein the resources on which the CSI-RS or the IMR is transmitted are staggered within the radio frame at least one of; between slots within a subframe;
oracross different symbols and tones in each resource block.
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17. A method of wireless communication, comprising:
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receiving, by a user equipment (UE), at least one of Channel State Information Reference Signal (CSI-RS) or Interference Measurement Resource (IMR) in a radio frame from a base station, wherein the receiving of the CSI-RS or the IMR includes receiving the CSI-RS or the IMR on resources located in different resource blocks in terms of frequency, wherein the resources on which the CSI-RS or the IMR is received are staggered within the radio frame between slots within a subframe; and performing, by the UE, at least one of channel estimation or interference estimation based on the staggered at least one of the resource on which the CSI-RS or the IMR is received. - View Dependent Claims (18, 19)
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Specification