Wireless node, radio node and methods for transmitting and receiving a reference signal
First Claim
1. A method, performed in a first wireless node, for transmitting a reference signal, wherein the first wireless node operates in a wireless communications network, the method comprising:
- turning transmission of the reference signal on or off based on reception or scheduling information; and
when the transmission of the reference signal is on and when data is to be received at the first wireless node, transmitting the reference signal, wherein the reference signal is transmitted from at least two transmit antennas of the first wireless node, wherein the reference signal is transmitted with a phase between the at least two transmit antennas indicating a desired phase related to radio conditions for reception of a transmission, from a first radio node, at the first wireless node, and wherein the reference signal is to be received and taken into account by at least one other radio node in the wireless communications network.
1 Assignment
0 Petitions
Accused Products
Abstract
A method in a first wireless node for transmitting a reference signal is provided. The first wireless node operates in a wireless communications network. The first wireless node transmits the reference signal from at least two transmit antennas of the first wireless node. The reference signal is transmitted with a phase between the at least two transmit antennas indicating a desired phase related to radio conditions for reception of a transmission from a first radio node at the first wireless node. The reference signal is to be received and taken into account by one or more other radio nodes in the wireless communications network, e.g. when scheduling transmissions to other wireless nodes.
18 Citations
22 Claims
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1. A method, performed in a first wireless node, for transmitting a reference signal, wherein the first wireless node operates in a wireless communications network, the method comprising:
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turning transmission of the reference signal on or off based on reception or scheduling information; and when the transmission of the reference signal is on and when data is to be received at the first wireless node, transmitting the reference signal, wherein the reference signal is transmitted from at least two transmit antennas of the first wireless node, wherein the reference signal is transmitted with a phase between the at least two transmit antennas indicating a desired phase related to radio conditions for reception of a transmission, from a first radio node, at the first wireless node, and wherein the reference signal is to be received and taken into account by at least one other radio node in the wireless communications network.
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2. A method, performed in a second radio node, for receiving a reference signal from a first wireless node, wherein the second radio node operates in a wireless communications network, the method comprising:
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receiving, in at least two receive antennas of the second radio node, the reference signal from the first wireless node, wherein the received reference signal has a phase indicating a desired phase related to radio conditions for reception of a transmission, from a first radio node, at the first wireless node; and selecting, based on the phase of the received reference signal, pre-coder weights for data transmission to a second wireless node.
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3. A first wireless node configured to operate in a wireless communications network, the first wireless node comprising a transmitter, wherein the transmitter is configured to:
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turn transmission of a reference signal on or off based on reception or scheduling information; and when the transmission of the reference signal is on and when data is to be received at the first wireless node, transmit the reference signal, wherein the reference signal is transmitted from at least two transmit antennas of the first wireless node, wherein the reference signal is transmitted with a phase between the at least two transmit antennas indicating a desired phase related to radio conditions for reception of a transmission, from a first radio node, at the first wireless node, and wherein the reference signal is to be received and taken into account by at least one other radio node in the wireless communications network. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A second radio node configured to operate in a wireless communications network, the second radio node comprising a receiver, wherein the receiver is configured to:
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receive, in at least two receive antennas of the second radio node, a reference signal from a first wireless node, wherein the received reference signal has a phase indicating a desired phase related to radio conditions for reception of a transmission, from a first radio node, at the first wireless node; and select, based on the phase of the received reference signal, pre-coder weights for data transmission to a second wireless node. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification