Artificial interference injection for channel state information reporting
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsDavid Hammarwall, Svante Bergman, George Jöngren
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Abstract
A system and method for improving the link adaptation in a wireless communication system is disclosed. User Equipment (UE) forms an interference hypothesis by amending a measured interference and noise by artificially injecting, to the measured interference and noise, interference corresponding to at least one emulated interfering isotropic signal that is virtually transmitted over an associated estimated effective channel. The UE further determines at least one channel state information (CSI) report based on the interference hypothesis, and transmits the CSI report to the network.
Claims27
A method for improving link adaptation in a wireless communication system, the method performed at a User Equipment, UE, and comprising:
- measuring interference on a set of time-frequency resources, TFREs, configured by an eNodeB;
- injecting at least one emulated interference signal into the measured interference to form a modified measured interference;
- determining a first Channel State Information, CSI, report based in part on the modified measured interference;
- and
- sending the first CSI report to the eNodeB.
A User Equipment, UE, configured to improve link adaptation in a wireless communication system, the UE comprising:
- a communications interface configured to receive a reference signal transmitted by a plurality of transmission points over an effective channel using a set of time-frequency resources, TFREs, configured by an eNodeB, wherein a first transmission point is muted on the set of TFREs by the eNodeB;
- and
- a programmable controller configured to:
- measure interference on the set of TFREs configured by the eNodeB;
- inject at least one emulated interference signal into the measured interference to form a modified measured interference;
- determine a first Channel State Information, CSI, report based on the modified measured interference;
- and
- send the first CSI report to the eNodeB.
A method for improving link adaptation in a wireless communication system, the method performed at an eNodeB and comprising:
- muting one or more transmission points on a set of time-frequency resources, TFREs, wherein a UE has been configured to measure interference on the set of TFREs;
- transmitting at least one distinct reference signal from at least one of the transmission points;
- and
- configuring the UE to inject at least one emulated interference signal into the measured interference based on a virtual transmission over the at least one effective channel that is specified by the at least one transmitted distinct reference signal, to report Channel State Information, CSI.
An eNodeB configured to improve link adaptation in a wireless communication system, the eNodeB comprising:
- a communications interface configured to communicate with a UE via the wireless communication system;
- and
- a programmable controller operatively coupled to the communication interface and configured to:
- mute one or more transmission points on a set of time-frequency resources, TFREs, wherein the UE has been configured to measure interference on the set of TFREs;
- transmit at least one distinct reference signal from at least one of the transmission points;
- and
- configure the UE to inject at least one emulated interference signal into the measured interference based on a virtual transmission over the at least one effective channel that is specified by the at least one transmitted distinct reference signal, to report Channel State Information, CSI.
Dependencies are inferred from the claim text.