Time multiplexed channel state information reporting in a multi antenna wireless communication system

A method in a base station for scheduling a user equipment in a wireless communication system, which wireless communication system is in Multiple Input Multiple Output, MIMO, mode and comprises four transmit antennas, the base station being connected to the user equipment via a radio carrier, the method comprising:

• receiving Channel State Information, CSI, from the user equipment over a plurality of Transmission Time Intervals, TTIs, which CSI comprises Channel Quality Information, CQI, a Rank Indicator, RI, a Precoding Channel Indicator, PCI, and an Hybrid Automatic Repeat reQuest ACKnowledgement/Not ACKnowledgement, HARQ ACK/NACK;
• and
• scheduling the user equipment based on the received CSI.

A user equipment for enabling a base station to schedule the user equipment in a wireless communication system, which wireless communication system is in Multiple Input Multiple Output, MIMO, mode and comprises four transmit antennas, the user equipment being connected to the base station via a radio carrier, the user equipment comprises:

• a determining unit configured to determine a Channel State Information, CSI, based on information about a Common Pilot Indicator CHannel, CPICH, which CSI comprises Channel Quality Information, CQI, a Rank Indicator, RI, a Precoding Channel Indicator, PCI, and an Hybrid Automatic Repeat reQuest ACKnowledgement/Not ACKnowledgement, HARQ ACK/NACK;
• and
• a transmitter configured to transmit the CSI to the base station over a plurality of Transmission Time Intervals, TTIs, enabling the base station to schedule the user equipment.

A base station scheduling a user equipment in a wireless communication system, which wireless communication system is in Multiple Input Multiple Output, MIMO, mode and comprises four transmit antennas, the base station being connected to the user equipment via a radio carrier, the base station comprises:

• a receiver configured to receive Channel State Information, CSI, from the user equipment over a plurality of Transmission Time Intervals, TTIs, which CSI comprises Channel Quality Information, CQI, a Rank Indicator, RI, a Precoding Channel Indicator, PCI, and an Hybrid Automatic Repeat reQuest ACKnowledgement/Not ACKnowledgement, HARQ ACK/NACK;
• and
• a scheduler configured to schedule the user equipment based on the received CSI.