Methods and arrangements for CSI reporting
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsDavid Hammarwall, Svante Bergman
Life of this patent
Estimating the term…
Abstract
Some embodiments provide a method in a wireless device for reporting channel state information, CSI, for a CSI process. The CSI process corresponds to a reference signal resource and an associated interference measurement resource, IMR. According to the method, the wireless device obtains an interference power adjustment value. The wireless device estimates interference and noise based on the IMR, and on the interference power adjustment value. Furthermore, the wireless device determines channel state information based on an estimated effective channel measured based on the reference signal resource, and on the estimated interference and noise. Finally, the wireless device transmits the channel state information to a network node.
Claims27
A method in a wireless device for reporting channel state information, CSI, for a CSI process, the CSI process corresponding to a reference signal resource and an associated interference measurement resource, IMR, the method comprising:
- obtaining an interference power adjustment value;
- estimating interference and noise based on the IMR, and on the interference power adjustment value;
- determining channel state information based on an estimated effective channel measured based on the reference signal resource, and on the estimated interference and noise;
- and
- transmitting the channel state information to a network node.
A method in a network node for receiving, from a wireless device, channel state information, CSI, for a CSI process, the CSI process corresponding to a reference signal resource and an interference measurement resource, the network node being comprised in a cluster for coordinated multipoint transmission, the method comprising:
- transmitting, to the wireless device, an indication of an interference power adjustment value associated with the CSI process;
- and
- receiving channel state information related to the CSI process from the wireless device.
A wireless device for reporting channel state information (CSI), for a CSI process, the CSI process corresponding to a reference signal resource and an associated interference measurement resource (IMR), the wireless device comprising:
- radio circuitry and processing circuitry, the processing circuitry being configured to:
- obtain an interference power adjustment value;
- estimate interference and noise based on the IMR, and on the interference power adjustment value;
- determine channel state information based on an estimated effective channel measured, via the radio circuitry, based on the reference signal resource, and on the estimated interference and noise;
- and
- transmit, via the radio circuitry, the channel state information to a network node.
A network node configured to receive channel state information (CSI), for a CSI process, the CSI process corresponding to a reference signal resource and an interference measurement resource, the network node comprising:
- processing circuitry being connectable to radio circuitry, wherein the processing circuitry is configured to:
- transmit, to a wireless device and via the radio circuitry, an indication of an interference power adjustment value associated with the CSI process;
- and
- receive, via the radio circuitry, channel state information related to the CSI process from the wireless device.
Dependencies are inferred from the claim text.