Reference signal design for coordinated multipoint transmission
First Claim
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1. A method, comprising:
- controlling a plurality of transmission points, which are configured to operate in accordance with a Coordinated Multipoint (CoMP) transmission scheme, to transmit from the plurality of transmission points a same composite Reference Signal (RS) simultaneously with one another, coherently with one another and in the same time-frequency resource elements (REs) to a mobile communication terminal;
receiving from the terminal feedback, which is estimated in the terminal based on the composite RS that originated simultaneously and coherently from the plurality of the transmission points, the feedback being calculated in the terminal assuming a single-transmission-point transmission, but is indicative of a response of a composite communication channel between the plurality of the transmission points and the terminal; and
configuring subsequent transmission from the plurality of the transmission points based on the received feedback that was calculated in the terminal assuming the single-transmission-point transmission.
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Abstract
A method includes controlling a set of transmission points, which are configured to operate in accordance with a Coordinated Multipoint (CoMP) transmission scheme, to simultaneously transmit a composite Reference Signal (RS) to a mobile communication terminal. Feedback, which is indicative of a response of a composite communication channel between the transmission points and the terminal, is received from the terminal. The feedback is estimated in the terminal based on the composite RS received in the terminal from the transmission points. Subsequent transmission from the transmission points is configured based on the received feedback.
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Citations
20 Claims
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1. A method, comprising:
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controlling a plurality of transmission points, which are configured to operate in accordance with a Coordinated Multipoint (CoMP) transmission scheme, to transmit from the plurality of transmission points a same composite Reference Signal (RS) simultaneously with one another, coherently with one another and in the same time-frequency resource elements (REs) to a mobile communication terminal; receiving from the terminal feedback, which is estimated in the terminal based on the composite RS that originated simultaneously and coherently from the plurality of the transmission points, the feedback being calculated in the terminal assuming a single-transmission-point transmission, but is indicative of a response of a composite communication channel between the plurality of the transmission points and the terminal; and configuring subsequent transmission from the plurality of the transmission points based on the received feedback that was calculated in the terminal assuming the single-transmission-point transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Apparatus, comprising:
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an interface, which is configured to communicate with a plurality of transmission points that operate in accordance with a Coordinated Multipoint (CoMP) transmission scheme; and at least one processor, which is configured to control the plurality of the transmission points to transmit from the plurality of transmission points a same composite Reference Signal (RS) simultaneously with one another, coherently with one another and in the same time-frequency resource elements (REs) to a mobile communication terminal, to receive from the terminal feedback, which is estimated in the terminal based on the composite RS that originated simultaneously and coherently from the plurality of the transmission points, the feedback being calculated in the terminal assuming a single-transmission-point transmission, but is indicative of a response of a composite communication channel between the plurality of the transmission points and the terminal, and to configure subsequent transmission from the plurality of the transmission points based on the received feedback that was calculated in the terminal assuming the single-transmission-point transmission. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification