CSI AND ACK REPORTING ENHANCEMENTS IN LTE/LTE-A WITH UNLICENSED SPECTRUM
First Claim
1. A method of wireless communication, comprising:
- staggering within a radio frame, by a base station, at least one of Channel State Information Reference Signal (CSI-RS) resources or Interference Measurement Resource (IMR) resources at least one of;
across subframes;
between slots within subframes;
oracross different symbols and tones in each resource block; and
transmitting, by the base station, the radio frame to a user equipment (UE).
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
15 Claims
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1. A method of wireless communication, comprising:
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staggering within a radio frame, by a base station, at least one of Channel State Information Reference Signal (CSI-RS) resources or Interference Measurement Resource (IMR) resources at least one of; across subframes; between slots within subframes;
oracross different symbols and tones in each resource block; and transmitting, by the base station, the radio frame to a user equipment (UE). - View Dependent Claims (2, 3, 4)
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5. 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 stagger within a radio frame, by a base station, at least one of Channel State Information Reference Signal (CSI-RS) resources or Interference Measurement Resource (IMR) resources at least one of; across subframes; between slots within subframes;
oracross different symbols and tones in each resource block; and to transmit, by the base station, the radio frame to a user equipment (UE). - View Dependent Claims (6, 7, 8)
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9. A non-transitory computer-readable medium having program code recorded thereon, comprising:
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code for causing one or more computers to stagger within a radio frame, by a base station, at least one of Channel State Information Reference Signal (CSI-RS) resources or Interference Measurement Resource (IMR) resources at least one of; across subframes; between slots within subframes;
oracross different symbols and tones in each resource block; and code for causing the one or more computers to transmit, by the base station, the radio frame to a user equipment (UE). - View Dependent Claims (10, 11, 12)
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13. A method of wireless communication, comprising:
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receiving, by a user equipment (UE), a radio frame from a base station, wherein the radio frame has at least one of Channel State Information Reference Signal (CSI-RS) or Interference Measurement Resource (IMR) resources staggered at least one of; across subframes; between slots within subframes;
orwithin a plurality of symbols across a slot for different resource blocks; and performing, by the UE, at least one of channel estimation or interference estimation based on the staggered at least one of CSI-RS or IMR resources. - View Dependent Claims (14, 15)
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Specification