Method and apparatus for transmitting signal using spatial silencing
First Claim
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1. A method for a base station to transmit a signal in a heterogeneous network, the method comprising:
- transmitting, to a plurality of user equipment, information associated with a weight vector set, the weight vector set including one or more weight vectors that can be applied to reference signals carried by a subsidiary carrier through downlink control signals carried by a primary carrier;
transmitting, to the plurality of user equipment, the reference signals to which each of the one or more weight vectors included in the weight vector set has been applied;
receiving, from the plurality of user equipment, feedback information associated with channel measurement results for the reference signals;
determining weight vector information applied to a downlink signal carried by the subsidiary carrier, the weight vector information determined based on the feedback information, wherein the weight vector information is specific to each user equipment of the plurality of user equipment;
transmitting, to each user equipment of the plurality of user equipment, the determined weight information; and
transmitting, to each user equipment of the plurality of user equipment, the downlink signal carried by the subsidiary carrier using the determined weight vector information.
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Abstract
The present invention relates to a method for transmitting signals in a heterogeneous network, the method comprising: a step wherein a base station determines a value-added vector for forming a beam pattern to be applied to a subsidiary carrier; a step wherein carrier operation information including information related to the determined value-added vector is transmitted via a primary carrier; and a step wherein the subsidiary carrier is transmitted by applying the determined value-added vector.
22 Citations
15 Claims
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1. A method for a base station to transmit a signal in a heterogeneous network, the method comprising:
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transmitting, to a plurality of user equipment, information associated with a weight vector set, the weight vector set including one or more weight vectors that can be applied to reference signals carried by a subsidiary carrier through downlink control signals carried by a primary carrier; transmitting, to the plurality of user equipment, the reference signals to which each of the one or more weight vectors included in the weight vector set has been applied; receiving, from the plurality of user equipment, feedback information associated with channel measurement results for the reference signals; determining weight vector information applied to a downlink signal carried by the subsidiary carrier, the weight vector information determined based on the feedback information, wherein the weight vector information is specific to each user equipment of the plurality of user equipment; transmitting, to each user equipment of the plurality of user equipment, the determined weight information; and transmitting, to each user equipment of the plurality of user equipment, the downlink signal carried by the subsidiary carrier using the determined weight vector information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for a user equipment to receive a signal in a heterogeneous network, the method comprising:
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receiving, from a base station, information associated with a weight vector set including one or more weight vectors that can be applied to reference signals carried by a subsidiary carrier through downlink control signals carried by a primary carrier; receiving, from the base station, the reference signals to which each of the one or more weight vectors included in the weight vector set has been applied; transmitting, to the base station, feedback information associated with a channel measurement result for the reference signals; receiving, from the base station, weight vector information applied to a downlink signal carried by the subsidiary carrier, the weight vector information determined based on the feedback information; and receiving, from the base station, the downlink signal carried by the subsidiary carrier to which the weight vector information has been applied. - View Dependent Claims (9, 10)
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11. A base station in a heterogeneous network, the base station comprising:
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a transmission module configured to transmit a radio signal; a reception module configured to receive a radio signal; and a processor configured to; determine a weight vector for forming a beam pattern to be applied to a subsidiary carrier that is transmitted through the transmission module; control the transmitting module to transmit, to a plurality of user equipment, information associated with a weight vector set, the weight vector set including one or more weight vectors that can be applied to reference signals carried by the subsidiary carrier through downlink control signals carried by a primary carrier; control the transmitting module to transmit, to the plurality of user equipment, the reference signals to which each of the one or more weight vectors included in the weight vector set has been applied; control the reception module to receive, from the plurality of user equipment, feedback information associated with a channel measurement result for the reference signals; determine a weight vector information applied to downlink signals carried by the subsidiary carrier, the weight vector information determined based on the feedback information, wherein the weight vector information is specific to each user equipment of the plurality of user equipment; control the transmitting module to transmit, to each user equipment of the plurality of user equipment, the determined weight vector information; and control the transmitting module to transmit, to each user equipment of the plurality of user equipment, the downlink signals carried by the subsidiary carrier using the determined weight vector information.
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12. A user equipment in a heterogeneous network, the user equipment comprising:
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a reception module configured to receive a radio signal; a transmission module configured to transmit a radio signal; and a processor configured to; perform a channel measurement based on a downlink signal received through the reception module; control the reception module to receive, from a base station, information associated with a weight vector set, the weight vector set including one or more weight vectors that can be applied to reference signals carried by a subsidiary carrier through downlink control signals carried by a primary carrier; control the reception module to receive, from the base station, the reference signals to which each of the one or more weight vectors included in the weight vector set has been applied; control the transmitting module to transmit, to the base station, feedback information associated with a channel measurement result for the reference signals; control the reception module to receive, from the base station, weight vector information applied to a downlink signal carried by the subsidiary carrier, the weight vector information determined based on the feedback information; and control the reception module to receive, from the base station, downlink signals carried by the subsidiary carrier to which the weight vector information has been applied. - View Dependent Claims (13, 14, 15)
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Specification