Method and arrangement in a telecommunication system
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsLars Lindbom, George Jöngren, Stefan Parkvall
Life of this patent
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Abstract
A method and an arrangement in a user equipment for reporting Channel State Information, CSI, and a method and an arrangement in a base station for obtaining CSI are provided. The user equipment is in connection with the base station in a cellular communication network. After receiving a receiving a grant in a subframe n to be used for CSI reporting, from the base station, the user equipment determines subframe type of a subframe n+p. The user equipment then reports to the base station, CSI reflecting channel conditions in the subframe type of subframe n+p. p is a variable value.
Claims18
A method in a user equipment for reporting Channel State Information (CSI) to a base station in a cellular communication network, the method comprising:
- receiving, from the base station, in a subframe n, a grant of uplink resources to be used for CSI reporting,
- determining a subframe type of a subframe n+p, where p is a value or function known to the user equipment and the cellular communication network;
- and
- reporting, to the base station, CSI that reflects channel conditions in subframes of the determined subframe type;
- wherein the determined subframe type is one of two or more subframe types, each of which two or more subframe types is associated with a respective set of different subframes, and wherein the reported CSI reflects channel conditions particular to subframes belonging to the set of subframes associated with the determined subframe type.
A user equipment adapted to communicate with a base station in a cellular communication network, said user equipment being capable of reporting channel state information to said base station and said arrangement comprising processing circuitry configured to:
- receive, from the base station, a grant in a subframe n, a grant of uplink resources to be used for CSI reporting;
- determine a subframe type of a subframe n+p, where p is a value or function known to the user equipment and the cellular communication network;
- and
- report, to the base station, CSI that reflects channel conditions in subframes of the determined subframe type;
- wherein the determined subframe type is one of two or more subframe types, each of which two or more subframe types is associated with a respective set of different subframes, and wherein the reported CSI reflects channel conditions particular to subframes belonging to the set of subframes associated with the determined subframe type.
Dependencies are inferred from the claim text.