Precoding Control Indication Feedback Method, User Equipment, and Base Station
AssigneeHuawei Technologies Co., Ltd.
InventorsWenying Xu, Xueli Ma
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Abstract
Embodiments of the present invention disclose a precoding control indication feedback method, a user equipment, and a base station. Channel capacity values corresponding to precoding matrices in a precoding matrix set are calculated. A sequence number of a precoding matrix corresponding to a maximum channel capacity value is used as a PCI to be used. The PCI to be used, a CQI indicating downlink channel quality, and ACK/NACK indicating a data decoding result are borne over an uplink HS-DPCCH. The same are fed back to a corresponding base station node to instruct the base station node to select a MIMO single-stream manner or a single-antenna manner to send data to be sent.
Claims20
A precoding control indication feedback method, comprising:
- calculating channel capacity values corresponding to precoding matrices in a precoding matrix set, wherein a channel capacity value corresponding to a precoding matrix;
- using a sequence number of a precoding matrix corresponding to a maximum channel capacity value as a precoding control indication (PCI) to be used;
- bearing the PCI to be used, a channel quality indication (CQI) indicating downlink channel quality, and ACK/NACK indicating a data decoding result over an uplink high-speed dedicated physical control channel (HS-DPCCH);
- and
- feeding back the PCI, the CQI and the ACK/NACK to a corresponding base station node to instruct the base station node to select a multiple input multiple output (MIMO) single-stream manner or a single-antenna manner to send data to be sent;
- wherein the precoding matrix set comprises antenna switching precoding matrices and original precoding matrices in a precoding protocol;
- and
- wherein the antenna switching precoding matrices enable a result of precoding processing performed by the base station node on the data to be sent to be one-dimensional data, thereby using the single-antenna manner to send the data to be sent.
A precoding control indication feedback method, comprising:
- receiving feedback information which is sent by a user node over an uplink high-speed dedicated physical control channel (HS-DPCCH), wherein the feedback information comprises a precoding control indication (PCI) to be used, a channel quality indication (CQI) indicating downlink channel quality, and ACK/NACK indicating a data decoding result;
- obtaining a current precoding matrix in a precoding matrix set corresponding to the PCI to be used;
- performing precoding processing on data to be sent by using the current precoding matrix;
- and
- selecting a single-antenna manner to send the data to be sent when a precoding processing result is one-dimensional data.
A user equipment, comprising a precoding control indication feedback system, wherein the precoding control indication feedback system comprises:
- a channel capacity calculating module, configured to calculate channel capacity values corresponding to precoding matrices in a precoding matrix set, wherein a channel capacity value corresponds to a precoding matrix;
- a precoding control indication (PCI) determining module, configured to use a sequence number of a precoding matrix corresponding to a maximum channel capacity value as a PCI to be used;
- and
- a feedback information sending module, configured to bear the PCI to be used, a channel quality indication (CQI) indicating downlink channel quality, and ACK/NACK indicating a data decoding result over an uplink high-speed dedicated physical control channel (HS-DPCCH), and to feed back the PCI, the CQI and the ACK/NACK to a corresponding base station node to instruct the base station node to select a multiple input multiple output (MIMO) single-stream manner or a single-antenna manner to send data to be sent;
- wherein the precoding matrix set comprises antenna switching precoding matrices and original precoding matrices in a precoding protocol;
- and
- wherein the antenna switching precoding matrices enable a result of precoding processing performed by the base station node on the data to be sent to be one-dimensional data, thereby using the single-antenna manner to send the data to be sent.
A base station, comprising a data precoding system, wherein the data precoding system comprises:
- a feedback information receiving module, configured to receive feedback information that is sent by a user node over an uplink high-speed dedicated physical control channel (HS-DPCCH), wherein the feedback information comprises a precoding control indication (PCI) to be used, a channel quality indication (CQI) indicating downlink channel quality, and ACK/NACK indicating a data decoding result;
- a precoding matrix determining module, configured to obtain a current precoding matrix in a precoding matrix set corresponding to the PCI to be used;
- a precoding module, configured to perform precoding processing on data to be sent by using the current precoding matrix;
- and
- an analysis processing module, configured to select, when a precoding processing result is one-dimensional data, a single-antenna manner to send the data to be sent.
Dependencies are inferred from the claim text.