METHOD AND APPARATUS FOR SEPARABLE CHANNEL STATE FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM
First Claim
1. A method, comprising:
- identifying one or more intra-node codebooks comprising a set of vector quantized entries relating to per-node channel conditions and one or more inter-node codebooks comprising a set of vector quantized entries relating to channel conditions between respective associated network nodes;
selecting one or more intra-node codebooks or inter-node codebooks from which to provide channel state feedback to an associated network node; and
providing channel state feedback to the associated network node corresponding to at least one selected codebook.
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Accused Products
Abstract
Systems and methodologies are described herein that facilitate the generation and use of separable, hierarchical channel state feedback in a wireless communication system. As described herein, in the event that multiple network nodes cooperate to conduct downlink transmissions to a network user, channel state feedback as reported by the network user can be separated into intra-node feedback relating to per-node channel conditions and inter-node feedback relating to relative phase and/or amplitude between channels corresponding to respective nodes. Further, a network user can select to report intra-node feedback and/or inter-node feedback based on network instructions, a cooperation strategy to be utilized by respective network nodes, or the like. As additionally described herein, respective codebooks on which inter-node and intra-node channel feedback is based can be configured to convey information relating to a partial channel description and/or to vary based on resource units (e.g., sub-bands, resource blocks, etc.) utilized for downlink communication.
67 Citations
61 Claims
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1. A method, comprising:
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identifying one or more intra-node codebooks comprising a set of vector quantized entries relating to per-node channel conditions and one or more inter-node codebooks comprising a set of vector quantized entries relating to channel conditions between respective associated network nodes; selecting one or more intra-node codebooks or inter-node codebooks from which to provide channel state feedback to an associated network node; and providing channel state feedback to the associated network node corresponding to at least one selected codebook. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A wireless communications apparatus, comprising:
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a memory that stores data relating to one or more intra-node codebooks comprising a set of vector quantized entries relating to per-node channel conditions and one or more inter-node codebooks comprising a set of vector quantized entries relating to channel conditions between respective associated network nodes; and a processor configured to select one or more intra-node codebooks or inter-node codebooks from which to provide channel state feedback to an associated network node and to provide channel state feedback to the associated network node corresponding to at least one selected codebook. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An apparatus, comprising:
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means for identifying one or more per-node channel state information (CSI) codebooks and one or more inter-node CSI codebooks constructed via vector quantization; means for selecting a per-node CSI codebook, an inter-node CSI codebook, or both a per-node CSI codebook and an inter-node CSI codebook from which channel state feedback is to be provided to one or more serving network nodes; and providing channel state feedback to the one or more serving network nodes based on one or more selected CSI codebooks. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A computer program product, comprising:
a computer-readable medium, comprising; code for causing a computer to identify one or more per-node channel state information (CSI) codebooks and one or more inter-node CSI codebooks constructed via vector quantization; code for causing a computer to select a per-node CSI codebook, an inter-node CSI codebook, or both a per-node CSI codebook and an inter-node CSI codebook from which channel state feedback is to be provided to one or more serving network nodes; and code for causing a computer to provide channel state feedback to the one or more serving network nodes based on one or more selected CSI codebooks. - View Dependent Claims (38, 39, 40, 41, 42)
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43. A method, comprising:
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analyzing one or more parameters relating to at least one of mobility of an associated user equipment unit (UE) or network backhaul conditions; selecting a downlink coordination strategy to be utilized across network nodes for communication with an associated UE based on one or more analyzed parameters; and instructing the associated UE to provide at least one of per-node or inter-node channel state feedback based at least in part on a selected downlink coordination strategy. - View Dependent Claims (44, 45, 46, 47, 48, 49)
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50. A wireless communications apparatus, comprising:
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a memory that stores data relating to a network user and a backhaul link between the wireless communications apparatus and at least one cooperative network node; and a processor configured to analyze respective parameters relating to at least one of mobility of the network user or condition of the backhaul link, to select a downlink coordination strategy to be utilized across network nodes for communication with the network user based on the respective parameters, and to instruct the network user to provide at least one of intra-node or inter-node channel state feedback based at least in part on the selected downlink coordination strategy. - View Dependent Claims (51, 52, 53)
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54. An apparatus, comprising:
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means for selecting a coordination strategy to be utilized across network nodes for downlink communication with a user equipment unit (UE) based on at least one of mobility of the UE, network backhaul conditions, or a number of associated transmit antennas; and means for requesting one or more of per-node channel state feedback or inter-node channel state feedback from the UE based at least in part on a selected coordination strategy. - View Dependent Claims (55, 56, 57)
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58. A computer program product, comprising:
a computer-readable medium, comprising; code for causing a computer to select a coordination strategy to be utilized across network nodes for downlink communication with a user equipment unit (UE) based on at least one of mobility of the UE, network backhaul conditions, or a number of associated transmit antennas; and code for causing a computer to request one or more of per-node channel state feedback or inter-node channel state feedback from the UE based at least in part on a selected coordination strategy. - View Dependent Claims (59, 60, 61)
Specification