Downlink transmission in a MU-MIMO system
First Claim
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1. A method comprising:
- managing a downlink transmission in a Multi User-Multiple Input Multiple Output MU-MIMO system, the MU-MIMO system comprising a base station, and a set of remote radio units connected to the base station, the method comprising the following acts performed by the base station;
obtaining large scale fading data related to a large scale fading over uplink transmission associated with a user equipment (UE), the act of obtaining comprising sorting remote radio units antennas sensed by the user equipment into two sets Di and Ui which are expressed as;
Di={j;
lij>
lik,∀
kε
Ui}
Ui={j;
lik>
lij,∀
kε
Di}
where lij refers to an estimation of large scale channel gain from user equipment i to antenna j,generating a UE-specific channel vector by using the large scale fading data, andscheduling the downlink transmission in the MU-MIMO system by using the UE-specific channel vector.
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Abstract
A method is provided for managing a downlink transmission in a Multi User-Multiple Input Multiple Output (MU-MIMO) system. The MU-MIMO system includes a base station and a set of remote radio units connected to the base station. The method includes: obtaining large scale fading data related to a large scale fading over uplink transmission associated with a user equipment (UE); generating a UE-specific channel vector by using the large scale fading data; and scheduling a downlink transmission by using the UE-specific channel vector.
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Citations
9 Claims
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1. A method comprising:
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managing a downlink transmission in a Multi User-Multiple Input Multiple Output MU-MIMO system, the MU-MIMO system comprising a base station, and a set of remote radio units connected to the base station, the method comprising the following acts performed by the base station; obtaining large scale fading data related to a large scale fading over uplink transmission associated with a user equipment (UE), the act of obtaining comprising sorting remote radio units antennas sensed by the user equipment into two sets Di and Ui which are expressed as;
Di={j;
lij>
lik,∀
kε
Ui}
Ui={j;
lik>
lij,∀
kε
Di}
where lij refers to an estimation of large scale channel gain from user equipment i to antenna j,generating a UE-specific channel vector by using the large scale fading data, and scheduling the downlink transmission in the MU-MIMO system by using the UE-specific channel vector. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A non-transitory computer readable medium comprising a computer program product and having thereon a computer program comprising program instructions, the computer program being loadable into a data-processing unit and adapted to cause the data-processing unit of a base station to carry out a method when the computer program is run by the data-processing unit, the method comprising:
managing a downlink transmission by the base station in a Multi User-Multiple Input Multiple Output MU-MIMO system, the MU-MIMO system comprising the base station, and a set of remote radio units connected to the base station, wherein managing comprises; obtaining large scale fading data related to a large scale fading over uplink transmission associated with a user equipment (UE), the act of obtaining comprising sorting remote radio units antennas sensed by the user equipment into two sets Di and Ui which are expressed as;
Di={j;
lij>
lik,∀
kε
Ui}
Ui={j;
lik>
lij,∀
kε
Di}
where lij refers to an estimation of large scale channel gain from user equipment i to antenna j,generating a UE-specific channel vector by using the large scale fading data, and scheduling a downlink transmission in the MU-MIMO system by using the UE-specific channel vector.
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8. A base station of a Multi User-Multiple Input Multiple Output MU-MIMO system, the MU-MIMO system further comprising a set of remote radio units connected to the base station, the base station comprising:
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a non-transitory computer-readable medium comprising instructions stored thereon; a data processing unit configured by the instructions to perform acts of; managing a downlink transmission in the Multi User-Multiple Input Multiple Output MU-MIMO system, wherein managing comprises; obtaining large scale fading data related to a large scale fading over uplink transmission associated with a user equipment, the act of obtaining comprising sorting remote radio units antennas sensed by the user equipment into two sets Di and Ui which are expressed as;
Di={j;
lij>
lik,∀
kε
Ui}
Ui={j;
lik>
lij,∀
kε
Di}
where lij refers to an estimation of large scale channel gain from user equipment i to antenna j,generating a UE-specific channel vector by using the large scale fading data, and scheduling the downlink transmission in the MU-MIMO system by using the UE-specific channel vector. - View Dependent Claims (9)
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Specification