| 主权项 |
1. A user equipment (UE) for time division duplex (TDD) communication through a wireless communication channel with an evolved Node B (eNB), the TDD communication having a radio frame including an uplink subframe and a special subframe preceding the uplink subframe, the UE comprising:
a receiver configured to receive from the eNB, a channel state information reference signal (CSI-RS) subframe configuration value, a CSI-RS configuration value, and a CSI-RS; and circuitry configured to:
determine, based on the CSI-RS subframe configuration value, a subframe index corresponding to a temporal position of a special subframe including the CSI-RS in the radio frame;determine, based on the CSI-RS configuration value, a CSI-RS pattern of one or more orthogonal frequency division modulation (OFDM) resource elements carrying the CSI-RS, the pattern being from among a group of CSI-RS patterns that include OFDM resource elements in OFDM symbols corresponding to a physical downlink control channel (PDCCH) region of a long term evolution (LTE) wireless communication channel;control the receiver to receive from the eNB the special subframe carrying the CSI-RS during the temporal position and at the one or more OFDM resource elements of the CSI-RS pattern; andmeasure the wireless communication channel based on the CSI-RS, in which the CSI-RS subframe configuration value has a value according to an expression 1+(x*5), where x satisfies the relationship 0≦x≦30. |
