Method for transmitting and receiving signals using collaborative MIMO scheme
First Claim
1. A method for a mobile station to receive a signal using a collaborative multiple-input multiple-output (Co-MIMO) scheme, the method comprising:
- measuring a channel from a serving base station and collaborative base stations including at least one neighboring base station, wherein the collaborative base stations perform the collaborative MIMO scheme together with the serving base station;
determining precoding matrix indexes for each of the collaborative base stations and reporting the precoding matrix indexes to the serving base station; and
receiving a same signal or independent signals from the collaborative base stations.
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Abstract
A method for reducing inter-cell interference and a method for transmitting a signal by a collaborative MIMO scheme, in a communication system having a multi-cell environment are disclosed. An example of a method for transmitting, by a mobile station, precoding information in a collaborative MIMO communication system includes determining a precoding matrix set including precoding matrices of one more base stations including a serving base station, based on signal strength of the serving base station, and transmitting information about the precoding matrix set to the serving base station. A mobile station in an edge of a cell performs a collaborative MIMO mode or inter-cell interference mitigation mode using the information about the precoding matrix set collaboratively with neighboring base stations.
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Citations
15 Claims
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1. A method for a mobile station to receive a signal using a collaborative multiple-input multiple-output (Co-MIMO) scheme, the method comprising:
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measuring a channel from a serving base station and collaborative base stations including at least one neighboring base station, wherein the collaborative base stations perform the collaborative MIMO scheme together with the serving base station; determining precoding matrix indexes for each of the collaborative base stations and reporting the precoding matrix indexes to the serving base station; and receiving a same signal or independent signals from the collaborative base stations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for a specific base station to transmit a signal together using a collaborative multiple-input multiple-output (Co-MIMO) scheme, the method comprising:
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receiving, from a mobile station that receives a signal using the collaborative MIMO scheme, precoding matrix indexes for the specific base station and collaborative base stations including at least one neighboring base station, wherein the collaborative base stations performing the collaborative MIMO scheme together with the specific base station; transmitting the precoding matrix indexes for each of the collaborative base stations to the at least one neighboring base station through an inter-network interface; and transmitting the same signal or independent signals to the mobile station together with the at least one neighboring base station. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification