Method for reporting channel state information (CSI) and base station
A technology for channel state information and reporting, applied in transmission path sub-channel allocation, wireless communication, signaling allocation, etc., can solve problems such as affecting the reliability of CSI report data transmission, increasing feedback overhead, and redundancy.
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Embodiment 1
[0109] Define two periodic CSI report methods:
[0110] Method 1: Feedback the periodic CSI report of one component carrier at a time;
[0111] Method 2: feedback periodic CSI reports of multiple component carriers at one time;
[0112] The base station configures the periodic CSI reporting mode of a user equipment as mode 1 or mode 2 through high-layer signaling. When it is configured as mode 2, the user equipment feeds back periodic CSI reports of all configured or activated (downlink) component carriers once.
Embodiment 2
[0114] The base station enables a user equipment to feed back periodic CSI reports of multiple component carriers at one time through high-layer signaling.
[0115] If for a certain user equipment, the periodic CSI report of multiple component carriers fed back at one time is not enabled, the user equipment feeds back the periodic CSI report of one (downlink) component carrier configured or activated at one time; The periodic CSI report of component carriers is enabled, and the user equipment feeds back the periodic CSI reports of all configured or activated (downlink) component carriers at a time.
[0116] When the user equipment feeds back the periodic CSI reports of multiple component carriers at a time, the periodic CSI reports are transmitted on a PUCCH with a specific format, or transmitted on multiple PUCCHs, or transmitted on the PUSCH.
[0117] The PUCCH in a specific format refers to a PUCCH specially used to carry uplink control information with a large amount of in...
Embodiment 3
[0142] Define 2 aperiodic CSI reporting methods:
[0143] Method 1: Feed back the aperiodic CSI report of one component carrier at a time;
[0144] Method 2: feedback aperiodic CSI reports of multiple component carriers at one time;
[0145] The base station configures the aperiodic CSI reporting mode of a user equipment as mode 1 or mode 2 through high-layer signaling. When it is configured as mode 2, the user equipment feeds back the aperiodic CSI reports of all configured or activated (downlink) component carriers once.
[0146] In the TDD system, the base station configures or activates three component carriers for the user equipment, namely CC0, CC1 and CC2.
[0147] If the aperiodic CSI reporting mode of the user equipment is configured as mode 1:
[0148] When the user equipment detects its PDCCH with a specific downlink control information format, the PDCCH schedules the user equipment to send PUSCH on CC0 (or CC1 or CC2), and where CQI request=1, the user equipment...
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