Channel state information feedback in coordinated multi-point system
First Claim
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1. An apparatus comprising:
- a channel estimation and feedback module (CEFM) to;
set a first rank for a plurality of nodes in coordinated multipoint (CoMP) measurement set, the plurality of nodes including a serving node to wirelessly communicate with a user equipment and one or more coordinating nodes to coordinate with the serving node to facilitate wireless communication with the user equipment;
calculate first-stage channel state information (CSI), including a first subband configuration, for the first rank;
calculate second-stage CSI for a second rank based on the first subband configuration, wherein the second rank is less than the first rank; and
calculate third-stage CSI for the first subband configuration and the first rank based on the second-stage CSI; and
a transmitter module to receive the third-stage CSI from the CEFM and to feed back the third-stage CSI to a selected node of the plurality of nodes.
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Abstract
Embodiments of the present disclosure describe devices, methods, computer-readable media and systems configurations for communication of channel state information among network entities. In various embodiments, may calculate first-, second- and third-stage channel state information for nodes of a coordinated multipoint measurement set. Other embodiments may be described and/or claimed.
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Citations
25 Claims
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1. An apparatus comprising:
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a channel estimation and feedback module (CEFM) to; set a first rank for a plurality of nodes in coordinated multipoint (CoMP) measurement set, the plurality of nodes including a serving node to wirelessly communicate with a user equipment and one or more coordinating nodes to coordinate with the serving node to facilitate wireless communication with the user equipment; calculate first-stage channel state information (CSI), including a first subband configuration, for the first rank; calculate second-stage CSI for a second rank based on the first subband configuration, wherein the second rank is less than the first rank; and calculate third-stage CSI for the first subband configuration and the first rank based on the second-stage CSI; and a transmitter module to receive the third-stage CSI from the CEFM and to feed back the third-stage CSI to a selected node of the plurality of nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. One or more non-transitory computer-readable media having instructions stored thereon, that, when executed cause a user equipment to:
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calculate second-stage channel state information (CSI) for one or more coordinating nodes of a coordinated multipoint (COMP) measurement set based on first rank that is equal to one, the second-stage CSI include a precoding vector, calculate a third-stage CSI for the one or more coordinating nodes based on a second rank that is greater than one, the third-stage CSI to include a plurality of precoding vectors with at least one component vector being the precoding vector or correlating to the precoding vectors; set a first rank for a plurality of nodes in the CoMP measurement set including the one or more coordinating nodes and a serving node, and calculate, for the serving node, first-stage CSI including a first subband configuration for the first rank. - View Dependent Claims (20, 21)
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22. An apparatus comprising:
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a receiver module configured to receive first and second channel state information (CSI) from user equipment; a transmit control module (TCM) coupled to the receiver module and configured to; determine, based on the first CSI, first transmission parameters, including one or more precoding vectors, to be used in downlink communications to the user equipment from a serving node of a coordinated multipoint (CoMP) system; and determine, based on the second CSI and a type of the CoMP system, second transmission parameters, including at least one precoding vector, to be used in downlink communications by one or more coordinating nodes of the CoMP system; and a transmitter module coupled to the TCM and configured to distribute the second transmission parameters to the one or more coordinating nodes. - View Dependent Claims (23, 24, 25)
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Specification