Estimation of channel quality indicator using unused codes
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsAndreas Cedergren, Anders Rosenqvist
Life of this patent
Estimating the term…
Abstract
Methods, a user equipment and a radio network node relating to estimation of a channel quality indicator, CQI, are provided. Downlink channels of a radio communication system are associated to a plurality of codes for code division multiplexing. Each downlink channel is associated to a respective code of said plurality of codes. The radio network node obtains information about an unused code among said plurality of codes. The user equipment obtains information about the unused code. The user equipment receives a downlink transmission from the radio network node. The user equipment estimates the CQI based on the unused code, wherein the unused code is unused with respect to the received downlink transmission.
Claims28
A method in a user equipment for estimating a Channel Quality Indicator, CQI, wherein the user equipment and a radio network node are comprised in a radio communication system, wherein downlink channels of the radio communication system are associated to a plurality of codes for code division multiplexing, wherein each downlink channel is associated to a respective code of said plurality of codes, wherein the method comprises:
- obtaining information about an unused code among said plurality of codes;
- receiving a downlink transmission from the radio network node;
- and
- estimating the CQI based on the unused code, wherein the unused code is unused with respect to the received downlink transmission.
A user equipment for estimating a Channel Quality Indicator, CQI, wherein the user equipment and a radio network node are comprised in a radio communication system, wherein downlink channels of the radio communication system are associated to a plurality of codes for code division multiplexing, wherein each downlink channel is associated to a respective code of said plurality of codes, wherein the user equipment comprises:
- a receiver configured to receive a downlink transmission from the radio network node, and
- a processing circuit configured to obtain information about an unused code among said plurality of codes, wherein the processing circuit further is configured to estimate the CQI based on the unused code, wherein the unused code is unused with respect to the received downlink transmission.
A method in a radio network node for enabling estimation of a Channel Quality Indicator, CQI, by a user equipment, wherein the radio network node and the user equipment are comprised in a radio communication system, wherein downlink channels of the radio communication system are associated to a plurality of codes for code division multiplexing, wherein each downlink channel is associated to a respective code of said plurality of codes, wherein the method comprises:
- obtaining information about an unused code;
- and
- sending a downlink transmission to the user equipment while taking the unused code into account.
A radio network node for enabling estimation of a Channel Quality Indicator, CQI, by a user equipment, wherein the user equipment and a radio network node are comprised in a radio communication system, wherein downlink channels of the radio communication system are associated to a plurality of codes for code division multiplexing, wherein each downlink channel is associated to a respective code of said plurality of codes, wherein the radio network node comprises:
- a processing circuit configured to obtain information about an unused code, and
- a transmitter configured to send a downlink transmission to the user equipment while taking the unused code into account.
Dependencies are inferred from the claim text.