Method for signaling MU-MIMO parameters

摘要

Methods for signaling multi-user multiple-input multiple output (MU-MIMO) parameters for Evolved-UTRA (E-UTRA) are disclosed. Example signaling format methods are presented that allow use of distributed virtual resource blocks (DVRB) or support of four wireless transmit/receive units (WTRUs) but maintaining a predetermined signal format size. A signaling format is also presented that signals transmission precoding matrix indexes used by all co-scheduled WTRUs.

主权项

1. A method for signaling multi-user multiple-input multiple-output (MU-MIMO) transmission parameters, the method comprising:
receiving a first downlink control information message with a distributed virtual resource block (DVRB) flag, a power share bit, and transmission precoding matrix index (TPMI) bits conveying a first set of transmission parameters on a condition of a two transmitting antenna configuration, wherein the TPMI bits are configured to indicate TPMIs of wireless transmit receive units (WTRUs) co-scheduled using the two transmitting antenna configuration; processing the first downlink control information message and applying the first set of transmission parameters to perform MU-MIMO reception in accordance with the two transmitting antenna configuration; receiving a second downlink control information message with a DVRB flag and additional TPMI bits conveying a second set of transmission parameters on a condition of a four transmitting antenna configuration, wherein the additional TPMI bits for the four transmitting antenna configuration comprise more TPMI bits than are used for the two transmitting antenna configuration, wherein the additional TPMI bits are configured to indicate TPMIs of WTRUs scheduled using the four transmitting antenna configuration, and wherein power sharing for the four transmitting antenna configuration is configured to be obtained from the additional TPMI bits; and processing the second downlink control information message and applying the second set of transmission parameters to perform MU-MIMO reception for the four transmitting antenna configuration.