Apparatus and method for periodic channel state reporting in a wireless network

摘要

Channel State Information (CSI) is reported by a subscriber station to a base station. The CSI is reported periodically for at least two physical uplink control channels (PUCCH). In case of a collision between a report for a first PUCCH and a report for the second PUCCH, each of the report types is partitioned into one of a number of classes, which include: a first class for rank indicator related report types and wideband (WB) W1 report types; a second class for WB report types or WB channel quality indicator report types; and a third class for subband related report types or W1 report types. A priority rule assigns a priority to each of the classes. The CSI feedback reports are transmitted according to the priority rule such that the report type included in a higher class is transmitted and the report type included in the lower class are dropped.

主权项

1. For use in a wireless communication network, a subscriber station configured to report channel characteristics of at least two component carriers to at least one base station, the subscriber station comprising:
a transceiver configured to transmit channel state information (CSI) feedback reports; and a controller configured to perform periodic CSI reporting regarding the at least two component carriers on at least two individually configured physical uplink control channels (PUCCH), wherein, in case of a collision between a first report type on a first PUCCH and a second report type for a second PUCCH in a same subframe, the controller is configured to determine each of the two report types to be one of a number of priority classes, the number of priority classes comprising: a first priority class comprising a rank indicator (RI) related report type and a wideband (WB) Precoding Matrix Indicator (PMI) report type; a second priority class comprising at least one WB channel quality indicator (CQI) related report type; and a third priority class comprising at least one subband (SB) related report type, and where the controller is configured to apply a priority rule to assign a priority to each one of the priority classes such that the controller causes the transceiver to transmit the report type included in a higher priority class and drop the report type included in a lower priority class, wherein when the first report type and the second report type are assigned a same priority class, the controller is configured to cause the transceiver to transmit a report corresponding to a lowest component carrier identifier and drop the other report type.