Method and apparatus for interference reporting in a N-MIMO communication system
First Claim
1. A method performed by a user equipment unit, the method comprising:
- identifying a set of network cells operable to conduct communication with inter-site coordination;
measuring an amount of received power from one or more network cells not associated with the identified set of network cells;
reporting the measured amount of received power to one or more network cells in the identified set of network cells; and
receiving communications from at least a subset of the identified set of network cells, the subset coordinated according to a coordination scheme selected at least in part based on the reported measured amount of received power.
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Accused Products
Abstract
Systems and methodologies are described herein that facilitate interference measurement and reporting in a network multiple-in-multiple-out (N-MIMO) communication system. As described herein, a network device can measure and report interference corresponding to network nodes outside a designated set of nodes that can cooperatively serve the device. Respective interference reports can additionally identify dominant interfering nodes, correlation between transmit antennas of respective nodes, or the like. Subsequently, respective interference reports can be combined with per-node channel information to manage coordination and scheduling across respective network nodes. As further described herein, interference from a network node can be measured by observing reference and/or synchronization signals from the network node. To aid such observation, respective non-interfering network nodes can define null pilot intervals in which transmission is silenced or otherwise reduced. As additionally described herein, loading information broadcasted by respective interfering network nodes can be identified and utilized in connection with interference calculation.
14 Citations
55 Claims
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1. A method performed by a user equipment unit, the method comprising:
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identifying a set of network cells operable to conduct communication with inter-site coordination; measuring an amount of received power from one or more network cells not associated with the identified set of network cells; reporting the measured amount of received power to one or more network cells in the identified set of network cells; and receiving communications from at least a subset of the identified set of network cells, the subset coordinated according to a coordination scheme selected at least in part based on the reported measured amount of received power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A wireless communications apparatus, comprising:
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a memory that stores data relating to a set of serving network cells operable to conduct communication with inter-site coordination; a processor configured to measure an amount of received power from one or more network cells not associated with the set of serving network cells and to report a measured amount of received power to one or more serving network cells; and a receiver configured to receive communications from at least a subset of the set of serving network cells, the subset coordinated according to a coordination scheme selected at least in part based on the reported measured amount of received power. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An apparatus, comprising:
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means for identifying a set of network cells operable to perform at least one of uplink communication or downlink communication using inter-site coordination; means for reporting an amount of received power corresponding to one or more network cells not associated with the set of identified network cells; and means for receiving communications from at least a subset of the identified set of network cells, the subset coordinated according to a coordination scheme selected at least in part based on the reported measured amount of received power. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37. A computer program product, comprising:
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a non-transitory computer-readable medium, comprising; code for causing a computer to identify a set of network cells operable to perform at least one of uplink communication or downlink communication using inter-site coordination; and code for causing a computer to report an amount of received power corresponding to one or more network cells not associated with the set of identified network cells; and code for causing a computer to receive communications from at least a subset of the identified set of network cells, the subset coordinated according to a coordination scheme selected at least in part based on the reported measured amount of received power. - View Dependent Claims (38, 39, 40, 41, 42, 43)
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44. A method performed by a network cell of a set of network cells operable to conduct communication using inter-site coordination with associated user equipment units, the method comprising:
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defining an interference reporting schedule for one or more of the associated user equipment unit; scheduling respective null pilot intervals within the interference reporting schedule; conducting limited transmission upon occurrence of a scheduled null pilot interval within the interference reporting schedule; receiving interference feedback from the one or more associated user equipment units subsequent to occurrence of a null pilot; and selecting a coordination scheme to be utilized across the set of network cells for communication with at least one of the one or more associated user equipment units based at least in part on the received interference feedback. - View Dependent Claims (45, 46, 47)
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48. A wireless communications apparatus of a network cell, the network cell operable to conduct communication using inter-site coordination across a set of network cells with one or more associated user equipment units, comprising:
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a memory that stores data relating to the one or more associated user equipment units and an interference reporting schedule associated with the one or more user equipment units; and a processor configured to define one or more null pilot intervals within the interference reporting schedule such that limiting is performed for communication occurring substantially simultaneously with the respective null pilot intervals, receive interference feedback from the one or more user equipment units subsequent to occurrence of a null pilot, and select a coordination scheme to be utilized across the set of network cells for communication with at least one of the one or more associated user equipment units based at least in part on the received interference feedback. - View Dependent Claims (49, 50, 51)
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52. An apparatus of a network cell, the network cell operable to conduct communication using inter-site coordination across a set of network cells with one or more associated user equipment units, comprising:
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means for defining an interference reporting schedule for the one or more associated user equipment units, wherein the interference reporting schedule includes one or more null pilots; means for performing at least one of transmit silencing or transmit power backoff upon occurrence of respective null pilots in the interference reporting schedule; means for receiving interference feedback from the one or more associated user equipment units subsequent to occurrence of a null pilot; and means for selecting a coordination scheme to be utilized across the set of network cells for communication with at least one of the one or more associated user equipment units based at least in part on the received interference feedback. - View Dependent Claims (53)
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54. A computer program product, comprising:
a non-transitory computer-readable medium, comprising; code for causing a computer of a network cell to define an interference reporting schedule for one or more associated user equipment units, wherein the interference reporting schedule includes one or more null pilots, the network cell operable to conduct communication using inter-site coordination across a set of network cells with the one or more associated user equipment units; code for causing a computer to conduct at least one of transmit silencing or transmit power backoff upon occurrence of respective null pilots in the interference reporting schedule; code for causing a computer to receive interference feedback from the one or more associated user equipment units subsequent to occurrence of a null pilot; and code for causing a computer to select a coordination scheme to be utilized across the set of network cells for communication with at least one of the one or more associated user equipment units based at least in part on the received interference feedback. - View Dependent Claims (55)
Specification