Systems and methods for network MIMO
First Claim
1. A method of enabling network Multiple-Input Multiple-Output (MIMO) among a plurality of Base Stations (BSs) and a Mobile Station (MS), the method comprising:
- determining at a first BS of the plurality of BSs that the MS is eligible for MIMO;
sending to the MS an indication of network MIMO, wherein the indication of network MIMO causes the MS to measure Carrier to Interference Ratios (C/Is) based on pilot signals received from the first BS and at least a second BS selected from the plurality of BSs; and
receiving feedback information from the MS, wherein the feedback information comprises at least;
an indication that the second BS is eligible for MIMO, the C/Is based on the pilot signals, and a precoding matrix index preferred by the MS.
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Abstract
A multiple-input, multiple-output (MIMO) communication system comprising a master base station and a slave base station. The master base station has a plurality of transmit antennas and transmits a first set of data to a mobile station in a first transmission. The slave base station has a plurality of transmit antennas and transmits a second set of data to the mobile station in the first transmission. The master base station retransmits the second set of data to the mobile station during a first retransmission and the slave base station retransmits the first set of data to the mobile station during the first retransmission.
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Citations
20 Claims
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1. A method of enabling network Multiple-Input Multiple-Output (MIMO) among a plurality of Base Stations (BSs) and a Mobile Station (MS), the method comprising:
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determining at a first BS of the plurality of BSs that the MS is eligible for MIMO; sending to the MS an indication of network MIMO, wherein the indication of network MIMO causes the MS to measure Carrier to Interference Ratios (C/Is) based on pilot signals received from the first BS and at least a second BS selected from the plurality of BSs; and receiving feedback information from the MS, wherein the feedback information comprises at least;
an indication that the second BS is eligible for MIMO, the C/Is based on the pilot signals, and a precoding matrix index preferred by the MS. - View Dependent Claims (2, 3, 4, 5, 6, 14, 15, 16, 17, 18, 19, 20)
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7. A base station (BS) in a Multiple-Input Multiple-Output (MIMO) system for enabling network MIMO among a plurality of BSs and at least one mobile station (MS), the BS comprising:
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at least one transmitting antenna; and a control system configured to; determine that the MS is eligible for MIMO; send to the MS an indication of network MIMO, wherein the indication of network MIMO causes the MS to measure Carrier to Interference Ratios (C/Is) based on pilot signals received from the BS and at least a second BS selected from the plurality of BSs; and receive feedback information from the MS, wherein the feedback information comprises at least;
an indication that the second BS is eligible for MIMO, the C/Is based on the pilot signals, and a precoding matrix index preferred by the MS. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification